Method and device for carrying out fast handover through rapid range control in wireless broadband communication systems

FIELD: wireless communication.

SUBSTANCE: present invention pertains to a method of carrying out fast handover by a subscriber station (SS) in a broadband wireless communications system, consisting of a base station (BS), exchanging data with a SS, and at least one BS, neighboring a service BS. The SS receives downlink signals from the service BS and neighboring BS, measures the arrival time difference of the downlink signal, received from the service BS, and the downlink signal received from the neighboring BS, and sends the measured time difference to the service BS.

EFFECT: effective range control in a wireless broadband communications system.

53 cl, 11 dwg, 4 tbl

 

The technical field to which the invention relates

The present invention in General relates to a broadband wireless communication system, in particular to a method and apparatus for performing fast transfer service with fast regulation of the range.

Description of the prior art

Broadband wireless communication system, which is currently under discussion in the group standardization Institute of engineers on electrical and electronics (IEEE) 802.16 standard, communicates point-the set of points between the base station (BS) and subscriber station (SS). Standard physical (PHY) level sets dupliciranje with a time division multiplexing (TDD) and dupliciranje with frequency division multiplexing (FDD) scheme duplexing and multiplexing time division channels using single-carrier (TDM-SC), multiplexing orthogonal frequency division multiplexing (OFDM) and multiple access orthogonal frequency division multiplexing (OFDMA) as a multiplexing scheme, and sets the standard control medium access (MAC)that can work together in the above PHY standards.

The following describes the configuration of the conventional communication system, described in IEEE 802.16, the link is th figure 1.

Figure 1 is a diagram illustrating the configuration of a broadband wireless communication system using the concept of the honeycomb, in particular the configuration of the IEEE 802.16e communication system.

Referring to figure 1, the IEEE 802.16e communication system based on the cell configuration and consists of BS1 and BS2 110 and 130, each of which manages its own hundredth, many SS 120a, 120b, 120c and 120d, managed BS1 110, and multiple SS 140a, 140b and 140c, managed BS2 130. SS are classified as stationary SS (FSS) and mobile SS (MSS) in accordance with their mobility.

Line 150 radio communications between the BS 110 and 130 and SS 120a, 120b, 120c, 120d, 140a, 140b and 140c, through which are transmitted/received signals is implemented using the above-mentioned schemes PHY. BS 110 and 130 are connected to each other in a wired way to exchange information among themselves.

If MSS4 120d is moved in an overlapping region between cells controlled BS1 and BS2 110 130 and continuously moves from the BS1 110, currently serving MSS4 120d (called a serving BS), in the direction of the target BS2 for MSS4 120d (called the target BS), in this case, there is a relay transmission or transfer service. I.e. serving BS MSS4 120d changes from BS1 BS2 110 130.

Figure 2 is a diagram illustrating a frame structure for the TDD system OFDMA, example of a broadband wireless communication system.

Referring to Fig. 2, the horizontal axis represents the nome the OFDM symbol, and the vertical axis represents the number of the subchannel. As illustrated in figure 2, each OFDMA frame includes Subcat downlink (DL)consisting of a set of, for example, 6 OFDM symbols, and Subcat uplink communication (UL)consisting of a set of, for example, 5 OFDM symbols. Each OFDM symbol consists of a set of, for example, M subchannels.

Each of the frames TDD OFDMA has a DL-MAP 210 and UL-MAP 220, representing the information of resource allocation subbarow descending/ascending line. Message DL-MAP specifies how resources contributing to Subcat downlink, are assigned to the SS, and the message UL-MAP defines how the resources that make up Subcat ascending line of communication assigned to the SS.

The frame of the TDD OFDMA may include a message 230a descriptor channel downlink (DCD)message 230V descriptor channel uplink communication (UCD) and the message 230c alert neighboring station (NBR-ADV), and these messages are periodically included in the frame of the TDD OFDMA and may differ from each other in terms of the acceptance period. Message 230a DCD includes associated with the channel downlink parameters message 230V UCD includes associated with channel uplink communication parameters, and the message 230c NBR-ADV includes information about the neighbor BS.

Figure 3 is a diagram illustrating the procedure of the initial regulirovaniya to compensate for the delay of the signal in both directions (RTD) due to the difference of position between BS and SS in the broadband wireless communication system. Referring to figure 3, the BS 310 assigns the interval 311 initial control range corresponding to the multiple of the initial transmission regulation range, allowing reception RTD SSn 330 placed in the farthest position from the service area of its cell. Figure 3 BS 310 includes one possibility to transfer the initial regulation range. After the appointment of the initial interval regulation range BS 310 broadcasts this information to all SS through the UL-MAP.

SS, who should perform the initial adjustment range, for example, SS1 320 and SSn 330 transmit messages 321 and 331 of the request regulation range (RNG-REQ), respectively, in the beginning of the interval 311 initial regulation of the range specified in the UL-MAP. In the OFDMA scheme, the message RNG-REQ includes code regulation band CDMA.

Message 321 and 331 RNG-REQ is transmitted on a competitive basis, and based on competition can lead to conflict messages for SS placed at the same distance from the BS 310. To resolve this problem, the standard IEEE 802.16e communication system provides the ability SS arbitrarily to determine the possibility of transmission before the transmission of messages RNG-REQ. The OFDMA scheme allows SS to arbitrarily choose before sending not only the transmission but also the codes of the regulation range is C-specific set, thereby reducing the conflict messages. However, the OFDMA scheme still suffers from a conflict message.

SS1 320 and SSn 330 do not experience conflicts RNG-REQ due to different distances from the BS 310. Therefore, the BS 310 can successfully receive the transmitted messages RNG-REQ. BS 310 can be measured RTD value 312a SS1 320 by calculating the time difference between the time of receipt 321 RNG-REQ transmitted from SS1 320, and the start time of the interval 311 initial regulation range can be measured RTD value 312b SSn 330 by calculating the time difference between the time of receipt 331 RNG-REQ transmitted from SSn 330, and the start time of the interval 311 initial regulation range.

BS 310 allows SS 320 and 330 to adjust the transmission time in the ascending line by providing the measured RTD value SS1 320 and SSn 330 through messages 322 and 332 answer for regulation range (RNG-RSP). The above processes are repeated until until time transfer SS 320 and 330 in the ascending line of communication will not come within the range specified in BS 310. Since the BS 310 allocates uplink communication SS1 320 and SSn 330, the next transmission of RNG-REQ may be performed not on a competitive basis.

Figure 4 is a block diagram of a sequence of operations illustrating a procedure of initial entry into the network and transmission service MSS standard IEEE 802.16e communication system. Referring to Fig. 4, after inclusion of the first MSS performs the process of selecting cell (step 401). The process of cell selection is the process of measuring the channel quality of the ascending and descending lines of communication, and it includes the process of receiving messages DL/UL-MAP and DCD messages/UCD for downlink and the initial regulation range for uplink communication. In the process of selecting a cell MSS records collected information about many hundred for future use, select the cell that provides the best quality of the ascending and descending line from the honeycomb, and performs the process of logging on to the network, described below, according to the result of selecting the cell.

When you are finished selecting cell MSS performs a synchronization process with the descending line of communication provided by the BS of the selected cell and obtaining the parameters of the reception (step 403). The process of obtaining parameters consists of a process of continuous reception of the message DL-MAP and receive associated with them DCD messages. After synchronization with the downward communication line MSS should take the UCD message from the BS, to get a possible transmission parameters for a channel of upward communication line (step 405).

After obtaining the parameters of the uplink connection MSS adjusts its transmission parameters in the ascending line of communication, such as time shift, frequency shift, and the shift of power by the percent of the initial sa of the control range (step 407). During the initial regulation range of the MSS is assigned from the BS connection identifier (CID), which should be used for transmission/reception of the control message.

After you have completed the initial regulation range of the MSS provides transmit/receive traffic for the BS, and the BS provides the following features transmit/receive traffic MSS-BS to MSS through messages based on information about MSS and their possibilities of transmission/reception, thereby performing the procedure basic bandwidth (step 409).

After the procedure of agreement on the basic bandwidth MSS shall perform authentication and key exchange with the BS according to the procedure specified in the IEEE 802.16 standard (step 411). After completing authorization and key exchange MSS is assigned from the BS additional CID for management purposes and is registered in the BS (step 413). After the registration process is complete BS MSS is assigned the IP address to send/receive traffic during the process of configuring IP connection (step 415) and performs the process of configuring the system time and receiving system parameters (step 417). Then MSS is assigned additional CID, which must be used to transmit/receive traffic for each service stream (step 419), and then ends the procedure log on to the network, if it reaches normal the second mode to transmit/receive traffic (step 423).

In normal mode MSS, which can transmit/receive traffic must perform periodic adjustment range at the intervals agreed with the BS in order to achieve synchronization of the uplink communication and keep/to adjust transmission parameters. In addition, the MSS must obtain the network topology using the BS (step 421). This allows faster execution of process re-entering the network during the transmission service. Obtaining network topology (step 421) is periodically broadcast by the aforementioned BS information of the neighboring BS. When this broadcast is BS information of the neighboring BS is performed by passing messages NBR-ADV.

If the channel layer downlink transmitted from the BS, i.e. the serving BS falls below a predetermined threshold, MSS searches BS that it acted as a new serving BS, i.e. the target BS using the information about the neighbor BS obtained through messages NBR-ADV. At this point, the MSS can only measure the signal levels downlink from the candidate target BS or send messages RNG-REQ candidate target BS along with the measurement signals downlink. In the following description of the first case, when the MSS measures only the signal levels falling is the second line connection from the target BS, referred to as "passive scanning", whereas the second case, when the MSS performs the measurement of the signal levels of the descending line, and transmit messages RNG-REQ, referred to as "active scanning".

Candidate target BS, receiving the RNG-REQ transmitted via active scanning, provides MSS adjustment value parameters uplink communication and the estimated level of service through the transmission of the RNG-RSP. When the signal of the downlink from the serving BS is less than the signal strength of the candidate target BS, collected through the scanning process, the MSS transmits a request message for transmission service (HO-REQ) serving BS in order to begin the process of transmission service (step 425).

Message HO-REQ may include information associated with multiple candidate target BS. Serving BS, receiving the HO-REQ, selects the optimal target BS through the exchange of information with the candidate target BS and MSS notifies about the selected optimal target BS through a response message transmission service (HO-RSP). MSS receiving the HO-RSP, sends a message specifying a transmission service (HO-IND) serving BS, the serving BS will void all system resources allocated to the MSS when the message is received HO-IND (step 427).

MSS begins the process popcorn the input to the network for the target BS, beginning with a synchronization process with the descending line from the target BS and obtain the corresponding parameters (step 431). Further, the MSS performs the adjustment process parameters uplink communication (step 437) through the process of obtaining the parameters of the uplink communication (step 433), and procedures for regulating range (step 435).

After further correction parameters uplink connection MSS performs the authorization process in the new serving BS (step 439) and configures the connection with the MAC level by performing the registration process in the new serving BS (step 441). Through this MSS can usually perform transmission/reception of data with the new serving BS and can be assigned a new IP address in the following process (step 443).

As described above, in the conventional technology, the BS may assign a CID corresponding SS when sending RNG-RSP in response to message RNG-REQ and can allocate resources in an uplink communication for the subsequent, not based on competition send the message RNG-REQ. At this point, these resources are not necessarily intended for the SS seeking to select cells and obtaining the topology.

The invention

Traditional technology has disadvantages in that SS, exposed transmission service, performs the competition-based transmission regulated the I band in the process of obtaining the network topology or the process of re-entering the network. This can lead not only to loss of network resources, but also to unexpected significant delay and becomes a direct cause of reduced quality of service traffic for SS, attempting to complete the transfer.

Additionally, in the traditional way, when the target BS assigns an information element for fast regulation of the communication parameters (fast ranging; in the text of this application is referred to as "speed regulation range"), the target BS you want to assign resources, allow for the adoption of maximum RTD as described above, which leads to inefficient use of resources, and unexpected significant delay is invoked based on a competitive request for adjustment of communication parameters (ranging; in the text of this application is referred to as "throttling range"), carried out in the scanning process.

Therefore, the aim of the present invention is to provide a method and apparatus for more effective implementation of the regulatory process range in the broadcast, wireless communications system that uses the schema hundred.

Another objective of the present invention is to provide a method and apparatus for faster execution of transmission service by receiving the designated temporary connection identifier (CID) from the target base station during the scan the provision for transfer of service in broadband wireless systems.

Additional another objective of the present invention is to provide a method and apparatus for faster execution transfer service through effective evaluation delay of the signal in both directions (RTD) from the target base station required for transmission service, the subscriber station in the broadband wireless communication system.

Another another objective of the present invention is to provide a method and apparatus for faster execution of transmission service through the implementation of rapid regulatory range with the target base station based on the CID small length during the broadcast service in a broadband wireless systems.

In accordance with the first aspect of the present invention, a method of performing transfer of service of a subscriber station (SS) in a broadband wireless communication system that includes a serving base station (BS)communicating with the SS, and at least one neighboring BS, located essentially from the serving BS. The method contains the steps that will accept signals in downlink from the serving BS and the neighboring BS, measure the time difference of signal downlink, received from the serving BS signal downlink, received from the neighbor's, and transmit the measured time difference of receipt of the serving BS.

In accordance with the second aspect of the present invention, a method of performing transfer of service of a subscriber station (SS) from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located adjacent to the serving BS. The method comprises the steps on which the transfer request message to the control range of the target BS; receiving from the target BS in response to the request message on the regulation range of the response message for the regulation range, which includes a temporary connection identifier (CID)assigned to the SS; and accept the assigned information element fast regulation range from the target BS through the temporary CID in the process of determining transmission service to the target BS.

In accordance with a third aspect of the present invention, a method of performing transfer of service of a subscriber station (SS) from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many neighboring BS con is camping next to the serving BS. The method comprises the steps on which measure the time difference of signal downlink, received from the target BS, the relative signal downlink, received from the serving BS; evaluate the delay of the signal flow in both directions between the SS and the neighboring BS by using the measured time difference of receipt; and transmit the serving BS, a request message for transmission service, including the estimated delay of the signal in both directions.

In accordance with the fourth aspect of the present invention, a method of performing transfer of service of a subscriber station (SS) from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located next to the serving BS. The method comprises the steps on which measure the ratio of carrier power to interference and noise ratio (CINR) of the signal transmitted from the serving BS, and compare measured the resulting value with a predetermined threshold; if the measured result value is less than the threshold, scan on the subject of the neighboring BS, detect the signal transmitted from the neighboring BS, and measure the CINR of the detected signal and the time difference Postup the value of the signal relative to the signal, transmitted from the serving BS; after scanning on the subject of the neighboring BS, transmitting a request message for transmission service, including the measured time difference signal; after receiving the response message for transmission service from the serving BS in response to the request message transfer service, send the message specifying a transmission service serving BS; and performing the process to re-log into the network with a delay signal flow in both directions (RTD), reflected by the difference in time of receipt of the signal for transmission service to the target BS.

In accordance with the fifth aspect of the present invention provides a method for supporting transmission service serving base station (BS) in a broadband wireless communication system, which includes serving BS that communicates with the subscriber station (SS), and at least one neighboring BS, located next to the serving BS. The method contains the steps that take from SS request message for transmission service, including the difference between the time of receipt, the measured SS between signals downlink from the serving BS and the selected neighboring BS; evaluate information on the delay signal flow in both directions (RTD) through the difference of the time of receipt; and transmit on tennou information RTD selected neighboring BS.

In accordance with the sixth aspect of the present invention provides a method for supporting transmission service serving base station (BS) in a broadband wireless communication system, which includes serving BS that communicates with the subscriber station (SS), and at least one neighboring BS, located next to the serving BS. The method contains the steps that take from SS request message for transmission service, including the information on the delay of the signal in both directions (RTD), estimated SS between SS and selected neighboring BS; and transmitting information on the RTD to the selected neighboring BS.

In accordance with the seventh aspect of the present invention provides a method for supporting transmission service serving base station (BS) in a broadband wireless communication system, which includes serving BS that communicates with the subscriber station (SS), and many of the neighboring BS, located next to the serving BS. The method comprises steps, in which upon receipt of a message transfer request service from a specific SS generate a table of transmission service using the information related to the request message for transmission service; transmit a notification message transmission service, including the information, otnosiashiysia SS, which has transmitted the request message to the transfer of the neighboring BS; after receiving the response message for notification of transmission service corresponding to the notification message about the transfer service from the neighboring BS, update the table transfer service by using the information included in the response message for notification of transmission service; specify the target BS, which can provide SS an appropriate level of service, through the analysis of the temporary connection identifier (CID)included in the response message for notification of transmission service, and transmission to the target BS confirmation message transfer service, indicating that service of the SS will be transferred to the target BS; and after receiving a confirmation message transfer service, transfer to SS response message transmission service, including information on the target BS and the temporary CID.

In accordance with the eighth aspect of the present invention provides a method for supporting transmission service to the target base station (BS) in a broadband wireless communication system, which includes serving BS that communicates with the subscriber station (SS), and many of the neighboring BS, located next to the serving BS. The method contains the steps that take from the serving BS notification message is transmission service, includes estimated latency signal flow in both directions between the SS and the target BS; determine, to approve the transmission service requested by the requesting transmission service SS included in the notification message transmission service, determine the bandwidth and the level of service that can be provided by SS; transmit serving BS a response message for notification of transmission service, including the aforementioned specific information in the response message for notification of transmission service; and after receiving a confirmation message transfer service from the serving BS in response to the response message for notification of transmission services, prescribed information element rapid regulation of the range reflected by the estimated delay of the signal in both directions for fast regulation range, SS.

In accordance with the ninth aspect of the present invention, a method of performing transfer of service of a subscriber station (SS) from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located next to the serving BS. The method comprises the taps, which estimate the delay value of the signal flow in both directions (RTD) to the target BS based on the RTD value for the serving BS and the time difference signal between the signal received from the serving BS, and the signal received from the target BS; transmit evaluated RTD value to the target BS serving BS; and determine to transmit the service to the target BS, and receiving from the target BS a message that includes the assigned information element rapid regulatory range and estimated RTD value.

In accordance with the tenth aspect of the present invention, a subscriber station (SS) to perform a transfer service from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located next to the serving BS. The device comprises a receiving device for calculating the difference of time between receipt of the signal received from the serving BS, and the signal received from the target BS; CPU controls the medium access (MAC) to estimate the value of the delay signal flow in both directions (RTD) to the target BS based on the RTD value for the serving BS and the time difference post the crime, the calculated receiver; and transmitting device for transmitting RTD values for the target BS, estimated by the MAC processor, the serving BS or the target BS.

Brief description of drawings

The above and other objectives, features and advantages of the present invention will become clearer from the subsequent detailed description, taken together with the accompanying drawings, of which:

Figure 1 is a diagram illustrating the configuration of a broadband wireless communication system supporting transmission service;

Figure 2 is a diagram illustrating a frame structure for time-frequency broadband wireless communication system TDD OFDMA;

Figure 3 is a diagram illustrating the procedure for the initial control range to compensate for the delay of the signal in both directions (RTD) due to the difference of positions between BS and SS in the broadband wireless communication system;

Figure 4 is a block diagram of a sequence of operations illustrating a procedure for initial logon and transfer of MSS according to the standard IEEE 802.16e communication system;

Figure 5 is a diagram illustrating a situation of transfer of service resulting from movement of MSS;

6 is a diagram of signal transmission, illustrating based on the active scanning procedure transfer service which I by means of a quick control range according to the first variant implementation of the present invention;

Fig.7 is a diagram of signal transmission, illustrating based on the passive scanning procedure transfer services through a rapid regulation of the range according to the second variant of implementation of the present invention;

Fig is a block diagram illustrating the structure of the receiving / transmitting device in the device SS according to a variant implementation of the present invention;

Fig.9 is a block diagram of a sequence of operations illustrating the procedure of transfer of servicing, SS performed according to a variant implementation of the present invention;

Figure 10 is a block diagram of a sequence of operations illustrating the procedure of transfer of service performed serving BS according to a variant implementation of the present invention; and

11 is a block diagram of a sequence of operations illustrating the procedure of transfer of maintenance performed by the target BS according to a variant implementation of the present invention.

A detailed description of the preferred option exercise

Hereinafter described in detail several preferred embodiments of the present invention with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations contained in this document is omitted for brevity.

On toadie the invention provides a method of indirect initial regulation range (IIR), to reduce the time delay required during the initial regulation range with the target base station (BS) during a transmission service.

The way IIR according to the present invention reduces the transmission of scanning signals and minimizes the time delay by allowing a subscriber station (SS) to estimate the delay of the signal in both directions (RTD) by a preamble of the frame of the downlink (DFP)received from the target BS during the scanning process.

In the present invention BS prescribing information element (IE) rapid regulation range, uses a 16-bit temporary connection identifier (CID) instead of the 48-bit MAC address of the broadcast service, to distinguish the corresponding SS, thereby increasing the efficiency of resources.

In addition, the present invention provides the ability to quickly control range during transmission services by providing opportunities to be assigned to the temporary SS CID from the target BS during a scan for transmission service.

Hereinafter described in detail preferred embodiments of the present invention with reference to Fig. 5-11.

The following is a brief description of the situation when there is a transfer service in W is rotoprone the wireless communication system, with reference to Fig. 5.

Figure 5 is a diagram illustrating a situation of transfer of service resulting from moving MSS. Referring to figure 5, as MSS1 510 served by BS1 520 moves in the direction of the BS2 530, BS1 520 attempts to transfer the MSS1 510 BS2 530. In this case, BS1 520, MSS1 510 and BS2 530 realize the process of rapid regulatory range according to the present invention. In this case, as described above, BS1 and BS2 520 530 can communicate over a wired network 540, connecting them.

In this structure, the traditional way to quickly control range enables MSS1 510 to transmit non-competitive request for initial adjustment range in BS2 530, thereby providing the ability to quickly control range. However, the traditional way of fast regulation range leads to inefficient allocation of resources BS2 530. I.e. BS2 530 must allocate resources, allow for the adoption of the RTD between MSS1 510 and BS2 530. In addition, BS2 530 have to use 48-bit MAC address to indicate SS1 510 in the notification process on the allocation of resources through the message UL-MAP. Therefore, the present invention offers an effective way to quickly control range by means of Fig. 6 and 7.

As described above, the scanning process, in which the SS measures the levels of signals received from Sosa is them BS, to perform a transfer of shares in passive scanning, in which the SS measures only the level of the signal downlink from the target BS, and active scanning, in which the SS performs the measurement of the signal levels of the descending line, and send a message RNG-REQ. The following is a separate detailed description of how to quickly control range based on passive scan and how to quickly control range based scan.

The first version of the implementation (based on the active scanning procedure transfer service)

6 is a diagram of signal transmission, illustrating based on the active scanning procedure transfer services through a rapid regulation of the range according to the first variant implementation of the present invention. Referring to Fig.6, the method of transfer service according to the first variant implementation of the present invention allocates resources ascending line by 16-bit CID instead of the 48-bit MAC address of the SS used in the traditional way of fast regulation range.

Referring to Fig.6, SS1 610 requiring transmission service, transmits the request message to scan (SCN-REQ) in BS1 620 (step 641), and receives a response message scan (SCN-RSP) from BS1 620 in from the em to the message SCN-REQ (step 643). Next SS1 610 transmits a request message to the primary control range (RNG-REQ) in BS2 630 according to the process of active scanning (step 645). BS2 630 transmits a response message for the regulation range (RNG-RSP) in SS1 610 in response to message RNG-REQ (step 647). At this point, BS2 630 may appoint a temporary CID SS1 610 according to a variant implementation of the present invention. Temporary CID is CID, which can be temporarily used SS1 610 to perform the initial adjustment range for the target base station to send the service, i.e. BS2 630. Therefore, BS2 630 may be implemented in such a way as to cancel the assigned temporary CID, if there is no traffic from SS1 610 by using the temporary CID to a specified point in time.

After completion of the scan, if SS1 610 transmits a request message for transmission service (HO-REQ) for transmission service BS2 630 in BS1 620 (step 649), BS1 620 notifies BS2 630 of the transfer request service from SS1 610 with a message of notification of transfer of service (HO-Notification) (step 651). After that, BS2 630 informs BS1 620 whether to accept the transfer, using a response message for notification of transmission service (HO-Notification.Response) (step 653). Next BS1 620 receives the message HO-Notification.Response and BS2 determines 630 as the target BS, which will be re the ANO maintenance SS1 610, if it is determined that BS2 630 may receive transmission service. Then BS1 620 transmits a confirmation message transfer service (HO-Confirm) in BS2 630 (step 654).

After that, BS1 620 notifies SS1 610 how does BS2 630 transmission service in response to the message HO REQ from SS1 610, using the reply message transfer service (HO-RSP) (step 655). Next SS1 610 transmits a message specifying a transmission service (HO-IND) in BS1 620 (step 657), thereby taking the final decision on the transfer.

When BS2 630 receives the request for transmission service from SS1 610, it can provide the opportunity to send the message, non-competitive request for initial adjustment range SS1 610 by assigning IE fast regulation range (step 659). The purpose of IE quick regulation range can use a temporary CID assigned during the scanning process, instead of the MAC address SS1 610, according to a variant implementation of the present invention. Given that the MAC address SS1 610, as a rule, consists of 48 bits, and CID, as a rule, consists of 16 bits, using a temporary CID can contribute to the reduction of resources.

Next SS1 610 transmits/receives a message RNG-REQ and message RNG-RSP to/from BS2 630 (steps 661 and 663), thereby performing the initial adjustment range.

The aforementioned method according to the first variant implemented the I of the present invention is this is based on the active scanning method, and it cannot guarantee a quick adjustment range as the competitive transfer request message to the home regulation range is performed in the above process. The second variant implementation of the present invention provides a method of indirect initial regulation range (IIR) as another method, allowing to minimize the transmission delay of service.

The way IIR allows SS wishing to perform the transfer, skip the process of actively scanning and allows the target BS to assign IE fast regulation range with high efficiency, thereby providing the ability to quickly transfer service with high efficiency. Here's the way IIR according to the second variant of implementation of the present invention with reference to Fig.7.

The second variant of implementation (based on IIR procedure transfer service)

Fig.7 is a diagram of signal transmission, illustrating based on the passive scanning procedure transfer services through a rapid regulation of the range according to the second variant of implementation of the present invention. Fig.7 illustrates the procedure for IIR fast is peredachi service proposed in the present invention, in which during the process of obtaining the network topology implemented in transmission service, SS estimates the RTD value of the target BS simply by using the time difference of arrivals between the signals transmitted from the serving BS and the target BS, no transmission/reception of message throttling range to/from the target BS.

Referring to Fig.7, SS1 710 wishing to transfer service takes periodic preamble frames downlink (DFP) 741a, 741b, 741c, 745 and 749, each of which has a frame duration TDD/FDD, from BS1 720. SS1 710 may generate and adjust its own clock signal on the basis of the DFP signals 741a, 741b, 741c, 745 and 749, periodically transmitted from BS1 720.

If the value of the ratio of carrier power to interference and noise ratio (CINR) DFP 741b transmitted from BS1 720, falls below a predetermined threshold, SS1 710 transmits a message SCN-REQ BS1 720 to search for a new BS, and then receives a message SCN-RSP from BS1 720 to scan (step 743).

At this point, SS1 710 receives DFP 747 passed from BS2 730, and can measure the value of Δ (770) difference, the difference between the time of receipt of the preambles frames downlink (DTPA), between DFP 745 from BS1 720 and DFP 747 from BS2 730 through its own clock signal, generated/adjusted on the basis of DFP 741a, 741b, 71c, 745 and 749, periodically transmitted from BS1 720.

SS1 710 can estimate the RTD value RTD_BS2 for BS2 730 measured by DTPA-value 770. RTD_BS2 can be estimated using RTD values RTD_BS1 measured during the control range using BS1 720, and DTPA-value 770 in accordance with equation 1:

RTD_BS2 = RTD_BS1 + 2DTPA(1)

Referring to equation 1, RTD-value RTD_BS2 between SS1 710 and BS2 730 can be estimated as the value that is defined by reflection of the time difference signal flow in both directions (2xDTPA) between BS1 720 and BS2 730 in RTD-value RTD_BS1 between SS1 710 and BS1 720. Therefore, the estimated RTD value RTD_BS2 BS2 730 may be used as the value of the adjustment time, which can be reflected when SS1 710 transmits its BS2 730. When this estimated RTD value RTD_BS2 BS2 730 can be obtained through request/response initial adjustment range using SS1 710 and BS2 730.

To BS2 730 appointed IE fast regulation range SS1 710 with high resource efficiency, SS1 710 you must know the value RTD_BS2, which is the value of the correction that must be applied for transmission over the uplink connection. With this purpose, the second variant of implementation of the present invention proposes to provide an opportunity SS1 710 include DTPA measured-value 770 or is RTD_BS2 in the process is peredachi message HO-REQ (step 751).

BS1 720 receiving the HO-REQ includes adopted estimated DTPA-value or the estimated value RTD_BS2 (ERTD) in the message HO-pre-Notification (i.e. HO-Notification) and transmits the message to the HO-pre-Notification in BS2 730 (step 753). BS2 730 may perform the assignment IE fast regulation range with high efficiency of resource use through reflection value adjustments RTD_BS2 SS1 710 via message HO-pre-Notification, received from the BS 1 720.

As with the first variant of implementation of the present invention, the second variant of implementation of the present invention can also use a 16-bit CID instead of the 48-bit MAC address SS1 710. I.e. BS2 730 assigns a temporary CID SS1 710, recognized by the message HO-pre-Notification, and notifies BS1 720 appoint an interim CID via message HO-pre-Notification.Response (i.e. HO-Notification.Response) (step 755). Then BS1 720 receiving the HO-pre-Notification.Response determines that BS2 730 may receive transmission service, and selects BS2 730 as the target BS, which will be passed to the service SS1 710. Next BS1 720 transmits the message to the HO-Confirm BS2 730 (step 756). After that, BS1 720 notifies SS1 710 of adopted temporary CID via message HO-RSP (step 757).

SS1 710 receiving the HO-RSP, transmits the message to the HO-IND to BS1 720 (step 759) and IE takes quick control range from BS2 720 (step 761). Then SS1 710 and BS2 730 exchange message RN-REQ and RNG-RSP with each other in the way that described in connection with Fig. 6 (step 763 and 765), performing the initial adjustment range.

Although the method is based on the active scanning transmission service according to the first variant implementation of the present invention enables to be assigned to the subscriber station (SS1) temporary CID when the message is received RNG-RSP from the target BS (i.e. BS2), preferably, the method is based on the passive scanning transmission service according to the second variant of implementation of the present invention gave the opportunity to be assigned SS1 temporary CID when the message is received HO-RSP from BS2.

Tables 1-4 illustrate message formats, in which the fields should be partially modified or added to implement the present invention.

Table 1
SyntaxSize
HO-REQ_Message_Format () {
Message Type8-bit
N_Recommended8-bit
Estimated HO Time8-bit
For (j=0: j < N_Recommended; j++) {
Neighbor BS ID48-bit
BS CINR8-bit
DTPA or ERTD8-bit
Service level prediction8-bit
}
}

Table 2
SyntaxSize
HO-RSP_Message_Format 0 {
Message Type8-bit
Estimated HO time8-bit
N_Recommended8-bit
For (j=0; j<N_Recoimmended: j++) {
Neighbor BS ID48-bit
Temporary CID16-bit
Service level prediction8-bit
}
}

8-bit
Table 3
SyntaxSize
HO-pre-Notification_Message_Format () {
Global Header152-bit
For (j=0: j<Num_Records: j++) {
SS unique identifer48-bit
Estimated HO time8-bit
Required BW8-bit
Required QoS8-bit
ERTO8-bit
}
Security field48-bit
CRC field
}

Table 4
SyntaxSize
HO-pre-Notifeation-response_Message_Format 0 {
Global Header152-bit
For (j=0; j<Num_Records; j++) {
SS unique identifier48-bit
BW Estimated8-bit
QoS Estimated8-bit
Temporary CIO16-bit
}
Security field48-bit
CRC field8-bit
}

Referring to tables 1-4, the format of the message HO REQ table 1 must have a field of DTPA or Estimated RTD (ERTD) added to the traditional message format the message format HO-RSP table 2 should have a field Temporary CID added to the traditional message format the message format HO-pre-Notification table 3 must have a field ERTD added to the traditional format of the message, and the message format HO-pre-Notification.Response table 4 must have a field Temporary CID replacement field Ack/Nack in the traditional format of the message.

The following is a description of the receiving / transmitting device SS for implementing the method of transfer service according to the options ASU is estline of the present invention with reference to Fig.

Fig is a block diagram illustrating the device to perform the operation of SS described in connection with Fig.7. Referring to Fig, the device SS consists of a receiver 810, a MAC processor 820 and the transmitting device 830. The receiving device 810 comprises processing extension DFP (DPM) 840, module generation clock (TGM) 850, module 860 calculations DTPA, block 870 fast Fourier transform (FFT) for data reception and demodulator and FEC decoder 880.

DPM 840 is a module for processing DFP, or reference signal received from the current serving BS, and it measures the CINR of a serving BS, and if the measured CINR falls below the threshold, notifies the MAC processor 820 about the fall of the measured CINR. Additionally, DPM 840 notifies TGM 850 on the time of receipt of the periodic DFP and DFP accepts the neighboring BS in response to a request to scan the MAC processor 820. In addition, DPM 840 notifies the module 860 calculation of DTPA on the time of receipt DFP neighboring BS, adopted by scanning, and transmits data received after DFP, FFT-block 870.

TGM 850 generates its own clock information through a signal periodically received from DPM 840, and provides a reference time value for a module 860 calculation of DTPA. Module 860 calculations DTPA calculates the differential value of DTPA (or Δ) between the time of receipt of DFP current serving BS, the estimated OS is ove information about the reference time, provided by TGM 850, and the time of arrival of the new DFP BS provided by DPM 840.

The differential value is available in the MAC processor 820, and the MAC processor 820 transmits the request message to scan the transmitting device 830 and instructs DPM 840 to search for new BS, in response to the search request to the new BS, adopted from DPM 840. After taking calculated DTPA-values from the module 860 calculations DTPA MAC processor 820 evaluates the RTD value for the new BS based on the received DTPA-values.

The transmitting unit 830 transmits the message received from the MAC processor 820, the serving BS or the new BS.

The following is a description of the procedures for the transfer service running SS serving BS and the target BS according to a variant implementation of the present invention with reference to Fig. 9-11.

Fig.9 is a block diagram of a sequence of operations illustrating the procedure of transfer of servicing, SS performed according to a variant implementation of the present invention. Referring to Fig.9, the SS measures the CINR value DFP received from the serving BS, each frame (step 901). If the measured value DFPCINRservingBSless than a predetermined threshold TH_a (step 903), the SS starts to scan the neighboring BS (step 905). In the scanning SS detects DFP signals transmitted from the neighboring BS, measures the CINR values DFP-signals and ishmerai the DTPA-value through the device Fig (step 907).

Then SS completes the scanning of all the neighboring BS, notified serving BS (step 909), and then sets BS, which provides transmission service. How to set BS, which provides transfer service can be implemented in several ways. In the present invention SS generates the message HO REQ by the incorporation of BS ID, CINR and DTPA each BS, considering only those BS CINR values are measured during the scanning process, more of the threshold, and then transmits the message HO REQ serving BS (step 911). However, the present invention is not limited to this method and may use several other ways to specify the target BS.

SS transmits the anticipated time required for transmission service, together with the message HO REQ. Then the SS receives the message HO-RSP from the serving BS (step 913). SS detects a temporary CID assigned by the target BS included in the message HO-RSP. Then SS transmits the message to the HO-IND back to the serving BS (step 915). In conclusion, SS shifts the transmission time in the ascending line of communication for the selected target BS to the value ERTD (step 917), and performs the process of re-entry into the network for transmission service (step 919).

Figure 10 is a block diagram of a sequence of operations illustrating the procedure of transfer of service performed by service B in response to a request for transmission service from the SS according to a variant implementation of the present invention. Referring to Fig. 10, the serving BS receives a message HO REQ-specific SS (step 1001). Message HO-REQ includes the estimated time of transmission service (EHOT), provided by the SS for transmission services, and related information (CINR, DTPA and ERTD) candidate target BS.

Upon receipt of a message HO REQ serving BS is the table of transfer of service-related message HO REQ information (step 1003). Table transfer service is illustrated in table 5, the serving BS can be implemented in such a way as to control specific to the message HO REQ information using the table of transmission service, illustrated in table 5 (step 1009).

Table 5

BS

MSS
BS1BS2...BSi...BSn
MSS1CINRCINR_1-1...CINR_1-i...
ERTDERTD_1-1...ERTD_1-i...
P_BW......
P_QoS......
T_CID......
SLP......
R_BWR_BW_1
R_QoSR_QoS_1
EHOTEHOT_1
Target BS
........................
Violation wereCINRCINR_m-1CINR_m-2......CINR_m-n
ERTDERTD_m-1ERTD_m-2......ERTD_m-n
P_BW......
P_QoS......
T_CID......
SLP......
R_BWR_BW_m
R_QoSR_QoS_m
EHOTEHOT_m
Target BS

As illustrated in table 5, in the table of transfer of recorded information included in the message HO REQ and an information element that must be collected through successful operations, by transferring the neighboring BS serving BS on the horizontal axis and enumeration SS, which conveyed the message HO REQ, on the vertical axis.

Next, with reference to table 5 describes the SS1, which considers the transfer of the neighboring BS BS1-BSi by message HO REQ.

SS1 includes the estimated time of transmission service EHOT1 and values from CINR1-1/ERTD1-1 to CINR_1-i/ERTD_1-i for BS1-BSi, selected by scanning, the message HO REQ and sends the message HO REQ serving BS and the serving BS writes the received message in the table of transmission service, illustrated in table 5. Additionally, the serving BS analyses required SS1 bandwidth (R_BW_1)indicating the bandwidth necessary is directly SS1, and required SS1 QoS (R_QoS_1)indicating the quality of service (QoS)required SS1, based on the information recorded by SS1, and writes R_BW_1 and R_QoS_1 in the field R_BW and R_QoS table 5. Similarly, the serving BS records information HO-REQ adopted from another SS in the table transfer service table. 5.

Then, the serving BS tries to communicate with the neighboring BS to fill your own transfer service. Serving BS, the control table transmission service table 5, first transmits the message to the HO-pre-Notification (i.e. HO-Notification) BS1 (step 1005), and the message HO-pre-Notification includes the identifier (MAC address)/EHOT_1/ERTD_1-1/R_BW_1/R_QoS_1 ID (MAC address)/EHOT_m/ERTD_1-m/R_BW_m/R_QoS_m for SS1-SSm. In addition, the serving BS includes prior information in the message HO-pre-Notification and transmits the message to the HO-pre-Notification in BS2-BSn (step 1005).

After sending the message, the HO-pre-Notification serving BS receives a message HO-pre-Notification.Response (i.e. HO-Notification.Response) from the neighboring BS (step 1007), and the message HO-pre-Notification.Response includes information about SS included in the message HO-pre-Notification. Information includes the granted bandwidth (P_BW)provided QoS (P_QoS) and the temporary CID (T_CID), which may be granted SS from the BS which has transmitted a message to HO-pre-Notification.Response. If the value T_CID is equal to 0x0000, this means that BS, to the which conveyed the message HO-Notification.Response, can't take SS.

Next, the serving BS reflects the information included in the message HO-pre-Notification, in the table of transmission service (step 1009). Based on the recorded information of the serving BS determines the value of the forecast level of service (SLP), indicating the predicted level of service, at which neighboring BS can provide the service corresponding SS. After that, the serving BS determines BS that can provide the appropriate values for SS SLP, which has requested transmission service, and transmits the message to the HO-Confirm certain BS (step 1011), thereby notifying the BS receiving the HO-Confirm that SS will transfer to her.

Serving BS includes information (BS ID and SLP)associated with the BS which has transmitted a message to HO-Confirm message HO-RSP and transmits the message to the HO-RSP corresponding SS (step 1013). If the serving BS receives a message HO-IND in response to the sent message HO-RSP (step 1015), it reflects the final information on the target BS included in the message HO-IND, in the table of transmission service table. 5 (step 1017), thereby completing the procedure.

11 is a block diagram of a sequence of operations illustrating the procedure of transfer of maintenance performed by the target BS in response to the transfer request service from the SS according to a variant of implementation of this and is gaining. Referring to 11, the target BS receives the message HO-pre-Notification from serving BS (step 1101), since the procedure of transmission service. Based on the information about the SS included in the message HO-pre-Notification, the target BS determines whether it is to approve the transfer of requested SS (step 1103).

If the target BS may approve the transfer, the target BS determines a temporary CID (T_CID=value other than 0x0000), which must be assigned to the corresponding SS (step 1109), and determines P_BW and P_QoS that can be provided by SS (step 1111). Then the target BS includes certain information in the message HO-pre-Notification.Response and transmits the message to the HO-pre-Notification.Response serving BS which has transmitted a message to HO-pre-Notification (step 1113). After that, if the target BS receives the message HO-Confirm from the serving BS (step 1115), the target BS assigns IE fast regulation range for fast regulation range for SS included in the message HO-Confirm (step 1117).

The target BS reflects ERTD SS provided by the message HO-pre-Notification according to a variant implementation of the present invention, instead of assigning IE fast regulation range, so that she could take the minimum RTD-based service area cell, thereby releasing the interval with high efficiency use of resources.

However, if the target is th BS is unable to accept the request for the transfer of SS, reported by message HO-pre-Notification, the target BS sets the temporary CID T_CID is 0x0000 (step 1105) and transmits the message to the HO-pre-Notification.Response, including the information T_CID (step 1107), deny requests for transmission service.

As described above, the present invention enables the BS to assign IE fast regulation range for fast regulation range, use the 16-bit CID instead of the 48-bit MAC address of the corresponding SS, thereby increasing the efficiency radioresource. In addition, the method IIR according to a variant implementation of the present invention enables the SS during the scanning process to take only DFP new BS and tell the new BS RTD value to the new BS, which can be estimated on the basis of DFP by serving BS, thereby minimizing the transmission of signals and the delay when scanning and allowing the target BS to assign IE fast regulation range with high efficiency use of resources.

Although the invention is shown and described with reference to its specific embodiments of, specialists in the art should understand that various changes in form and content can be made without deviation from the spirit and scope of the invention, the set included the th claims.

1. Method of performing transfer of service of a subscriber station (SS) from the serving base station (BS) to a target BS selected from the set of neighboring BS through the serving BS in the broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located next to the serving BS, the method includes the steps are:

transmit the request message to the regulation of the communication parameters to the target BS;

receiving from the target BS in response to the request message to the regulation of communication parameters the response message for the regulation of communication parameters, including the temporary connection identifier (CID) of the target BS, assigned to the SS; and

take the assigned information element fast regulation of the communication parameters from the target BS through the use of temporary CID, after determining that the service is transmitted to the target BS;

perform a quick adjustment of communication parameters with the target BS through the use of assigned information element rapid regulatory communication parameters.

2. The method according to claim 1, in which the temporary CID is CID, temporarily used SS to perform the initial adjustment of communication parameters with the target BS, and it consists of 16 bits.

3. The method according to claim 1, in which the target BS cancels the temporary CID, if there is no connection traffic exchange that uses a designated temporary CID, to a predetermined point in time.

4. The method according to claim 1, the method further comprises the steps, passed after reception of the response message to the regulation of the communication parameters from the target BS serving BS, a request message for transmission service for transmission service to the target BS; and receive a response message transmission service from the serving BS.

5. Method of performing transfer of service of a subscriber station (SS) from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located next to the serving BS, the method includes the steps are:

measure the time difference of arrivals between the signal downlink, received from the target BS signal downlink, received from the serving BS;

estimate the delay of the signal flow in both directions between the SS and the target BS using the measured time difference of receipt; and

pass serving BS, a request message for transmission service, including the estimated delay of the signal in both directions.

<> 6. The method according to claim 5, the method further comprises the steps are taken from the target BS information element rapid regulatory communication parameters, adjusted by the estimated delay of the signal in both directions; and perform the initial adjustment of communication parameters for transmission service to the target BS after receiving an information item fast regulation range.

7. The method according to claim 5, in which the time difference of signal downlink, received from the target BS, the relative signal downlink, received from the serving BS is the value used to compensate the delay of the signal in both directions (RTD)caused by transmission/reception of signals between the target BS and SS, located at a distance from the serving BS.

8. The method according to claim 5, in which the delay signal flow in both directions (RTD_BS2) for the target BS is calculated by reflection of the time difference of arrival (DTPA, the difference between the time of receipt of the preambles frames downlink) between the serving BS and the target BS in RTD-value (RTD_BS1) between the SS and the serving BS according to the following:

RTD_BS2=RTD_BS1+2DTPA.

9. The method according to claim 8, in which the RTD for the target BS is used to correct time measured SS when the transmission signal is at the target BS, through the initial adjustment of the parameters of communication between the SS and the target BS.

10. The method according to claim 5, the method further comprises the steps are:

receive a response message transmission service, including temporary connection identifier (CID)assigned to the SS, from the serving BS in response to the request message transmission service after sending a request message for transmission service;

accept information element fast regulation of the communication parameters from the target BS after determining transmission service to the target BS; and

perform the initial adjustment of communication parameters with the target BS through the temporary CID after receiving an information item fast regulation of the communication parameters.

11. The method according to claim 10, the method further comprises the steps are:

detect, by the target BS, the SS through the message of the notification of transfer of service, transmitted from the serving BS; and

appoint, by the target BS, the corresponding temporary CID detected SS, and transmit the serving BS a response message for notification of transmission service, including temporary CID,

while serving BS transmits a temporary CID received from the target BS, the SS through the response message transmission about is the service.

12. The method according to claim 10, in which the temporary CID is CID, temporarily used SS to perform the initial adjustment of communication parameters with the target BS, and it consists of 16 bits.

13. The method according to claim 10, in which the target BS cancels the temporary CID, if there is no connection traffic exchange that uses a designated temporary CID, to a predetermined point in time.

14. Method of performing transfer of service of a subscriber station (SS) from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located next to the serving BS, the method includes the steps are:

measure the ratio of carrier power to interference and noise ratio (CINR) of the signal transmitted from the serving BS, and compare measured the resulting value with a predetermined threshold;

if the measured result value is less than the threshold, scan on the subject of the neighboring BS, detect the signal transmitted from the neighboring BS, and measure the CINR of the detected signal and the difference between the time of its receipt relative to the signal transmitted from the serving BS;

after scanning the subject of a neighboring BS, transmitting a request message for transmission service, including himself measured time difference signal;

after receiving the response message transmission service from the serving BS in response to the request message transfer service, send the message specifying a transmission service serving BS; and

perform process re-enter the network with a delay signal flow in both directions (RTD), reflected by the difference in time of receipt of the signal, for transmission service to the target BS.

15. The method according to 14, in which the difference of the time of receipt is the value used to compensate for the delay of the signal in both directions (RTD)caused by transmission/reception of signals between the target BS and SS, placed at a distance from the serving BS.

16. The method according to 14, in which the delay value of the signal flow in both directions (RTD_BS2) for the target BS is calculated by reflection of the time difference signal (DTPA, the time difference of receipt of preambles frames downlink) between the serving BS and the target BS in RTD-value (RTD_BS1) between the SS and the serving BS according to the following:

RTD_BS2=RTD_BS1+2DTPA.

17. The method according to clause 16, in which the RTD value to the target BS is used as the value of the adjustment time to correct time measured SS when transmitting signals to the target BS, and the estimated RTD value to the target BS is obtained by what redstem initial adjustment of the parameters of communication between the SS and the target BS.

18. The method according to 14, the method further comprises the steps are:

receive a response message transmission service, including temporary connection identifier (CID)assigned to the SS, from the serving BS in response to the request message transmission service, after sending a request message for transmission service;

accept information element fast regulation of the communication parameters from the target BS after determining transmission services to the target BS; and

perform the initial adjustment of communication parameters with the target BS through the temporary CID after receiving an information item fast regulation of the communication parameters.

19. The method according to p in which the temporary CID is CID, temporarily used SS to perform the initial adjustment of communication parameters with the target BS, and it consists of 16 bits.

20. Method of performing transmission service serving base station (BS) in a broadband wireless communication system, which includes serving BS that communicates with the subscriber station (SS), and at least one neighboring BS, located next to the serving BS, the method includes the steps are:

receive, via the serving BS, the SS request message for transmission service, including the differential is the time of receipt, the measured SS between signals downlink from the serving BS and the neighboring BS with respect to the selected neighboring BS;

appreciate the information on the delay signal flow in both directions (RTD) through the mentioned difference of the time of receipt; and

pass valued information RTD mentioned selected neighboring BS.

21. The method according to claim 20, in which the RTD (RTD_BS2) is estimated using RTD (RTD_BS1) between the SS and the serving BS and the time difference of arrival (DTPA, the time difference of receipt of preambles frames downlink) in accordance with the following:

RTD_BS2=RTD_BS1+2DTPA.

22. Method of performing transmission service serving base station (BS) in a broadband wireless communication system, which includes serving BS that communicates with the subscriber station (SS), and at least one neighboring BS, located next to the serving BS, the method includes the steps are:

receive, via the serving BS, the SS request message for transmission service, including the information on the delay of the signal in both directions (RTD) estimated SS between SS and the neighboring BS with respect to the selected neighboring BS; and

transmit information on RTD selected neighboring BS.

23. The method according to item 22, in which RTD (RTD_BS2) is estimated using RTD (RTD_BS1) between S and the serving BS and the time difference of arrival (DTPA, the time difference of receipt of preambles frames downlink) in accordance with the following:

RTD_BS2=RTD_BS1+2DTPA.

24. Method of performing transmission service serving base station (BS) in a broadband wireless communication system, which includes serving BS that communicates with the subscriber station (SS), and many of the neighboring BS, located next to the serving BS, the method includes the steps are:

after ingestion by a serving BS a request message for transmission service from a particular SS, generate a table of transmission service using the information related to the request message transmission services;

transmit the notification message transmission service, including the information relating to the SS, which conveyed the message transfer request service, the neighboring BS;

after receiving the response message for notification of transmission service corresponding to the notification message about the transfer service from the neighboring BS, specify the target BS, which can provide SS an appropriate level of service, through the analysis of the temporary connection identifier (CID)included in the response message for notification of transmission service, and transmission to the target BS confirmation message transfer services shall Denmark, indicates that the service SS will be transferred to the target BS; and

after sending a confirmation message transfer service, transfer SS response message transmission service, including information on the target BS and the temporary CID.

25. The method according to paragraph 24, the method further comprises a step in which upon receipt of a message specifying a transfer service from the SS in response to the response message transmission service update grid transmission service using the final information about the target BS included in the message specifying a transmission service.

26. The method according to paragraph 24, in which the request message for transmission service includes the difference of the time of receipt of signals that SS takes into account for transmission service, and information about the candidate target BS.

27. The method according to p, in which the difference of the time of receipt of signals is a value used to compensate for the delay of the signal in both directions (RTD)caused by transmission/reception of signals between the target BS and SS, while serving BS indicates the difference of the time of receipt of signals at the table transfer service.

28. The method according to item 27, in which the value of the RTD (RTD_BS2) for the target BS is calculated by reflection values of the time difference of arrivals of signals (DTPA, the time difference n the entry of preambles frames downlink) between the serving BS and the target BS in RTD-value (RTD_BS1) between the SS and the serving BS according to the following: RTD_BS2=RTD_BS1+2DTPA.

29. The method according to item 27, in which the RTD value to the target BS is used as the value of the adjustment time to correct time measured SS when transmitting signals to the target BS, and the estimated RTD value to the target BS is obtained by the initial adjustment of the parameters of communication between the SS and the target BS.

30. The method according to paragraph 24, in which the temporary CID is CID, temporarily used SS to perform the initial adjustment of communication parameters with the target BS, and it consists of 16 bits.

31. Method of performing transmission service to the target base station (BS) in a broadband wireless communication system, which includes serving BS that communicates with a particular subscriber station (SS), and many of the neighboring BS, located next to the serving BS, the method includes the steps are:

take, by the target base station, from the serving BS notification message transmission service, including the estimated delay of the signal in both directions (RTD) between the SS and the target BS;

determines that it is necessary to approve the transmission service requested by the requesting transmission service SS included in the notification message transmission service, determine the bandwidth and the level of service that can be provided by SS;

< num="199"> pass serving BS a response message for notification of transmission service, including the aforementioned specific information; and

after receiving a confirmation message transfer service from the serving BS in response to the response message for notification of transmission services, prescribed information element SS fast regulation of the communication parameters, reflected by the estimated delay of the signal in both directions, for fast regulation of the communication parameters.

32. The method according to p, the method further comprises the steps are:

define a temporary connection identifier (CID), which must be assigned to the SS; and

pass serving BS a response message for notification of transmission service, including temporary CID.

33. The method according to p in which the RTD value is used as the value of the adjustment time to correct time measured SS when transmitting signals to the target BS, and it is obtained through the initial adjustment of the parameters of communication between the SS and the target BS.

34. The method according to p in which the temporary CID is CID, temporarily used SS to perform the initial adjustment of communication parameters for the target BS, and it consists of 16 bits.

35. The method according to p in which the target BS cancels the temporary CID,if there is no connection traffic exchange, using the assigned temporary CID, to a predetermined point in time.

36. The method according to p, in which the delay signal flow in both directions (RTD_BS2) between the target BS and SS is calculated by reflection values of DTPA (time difference of receipt of preambles frames downlink) between the serving BS and the target BS in RTD-value (RTD_BS1) between the SS and the serving BS according to the following:

RTD_BS2=RTD_BS1+2DTPA.

37. Method of performing transfer of service of a subscriber station (SS) from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located next to the serving BS, the method includes the steps are:

appreciate the value of the delay signal flow in both directions (RTD) to the target BS based on the RTD value for the serving BS and the time difference signal between the signal received from the serving BS, and the signal received from the target BS;

passed into the serving BS, a request message for transmission service, including the estimated RTD value to the target BS; and

determines that it is necessary to perform the transfer to the target BS, and receiving from the target BS of the community is the group of includes assigned information element fast regulation of the communication parameters and the estimated RTD value.

38. The method according to clause 37, in which the RTD value to the target BS is calculated as follows:

RTD_BS2=RTD_BS1+2DTPA,

where RTD_BS2 indicates the RTD value to the target BS, RTD_BS1 indicates the RTD value for the serving BS, a DTPA refers to the difference between the time of receipt between the signal received from the serving BS, and the signal received from the target BS.

39. The method according to clause 37, in which the signals received from the serving BS and the target BS and used to calculate the difference of the time of receipt, are signals preambles frames downlink (DFP).

40. The method according to clause 37, in which, after transmission of the request message for transmission service, the SS receives from the serving BS a response message transmission service, including temporary connection identifier (CID)assigned by the target BS.

41. The method according to p, in which the SS performs initial adjustment of communication parameters with the target BS using the allocated temporary CID.

42. The method according to p in which the temporary CID is CID, temporarily used SS to perform the initial adjustment of communication parameters with the target BS, and it consists of 16 bits.

43. The method according to p in which the target BS cancels the temporary CID, if n is t join traffic exchange, using the assigned temporary CID, to a predetermined point in time.

44. The method according to clause 37, in which, after receiving the designated information element rapid regulatory communication parameters SS performs a quick adjustment of communication parameters with the target BS through assigned information element rapid regulatory communication parameters.

45. The device of the subscriber station (SS) to perform a transfer service from the serving base station (BS) to a target BS selected from the set of neighboring BS in a broadband wireless communication system, which includes serving BS that communicates with the SS, and many of the neighboring BS, located next to the serving BS, the device contains:

a receiving unit for calculating the difference of time between receipt of the signal received from the serving BS, and the signal received from the target BS, and receiving the designated information item fast regulation of the communication parameters from the target BS through the temporary CID in the process of determining transmission services to the target BS;

the CPU controls the medium access (MAC) to estimate the value of the delay signal flow in both directions (RTD) to the target BS based on the RTD value for the serving BS and the difference between the time of receipt, calculated adoptive us what device; and

a transmitting device for transmission in the serving BS or the target BS RTD values for the target BS, evaluated the MAC processor;

moreover, the SS performs a quick adjustment of communication parameters with the target BS through assigned information element rapid regulatory communication settings when it receives the assigned information element rapid regulatory communication parameters.

46. The unit SS in 45, in which the receiving device comprises: a processing module reference signals for processing the reference signal periodically received from the serving BS;

module generating a clock to generate its own information synchronization via signal periodically received from the processing module reference signals, and providing a reference time value; and

module calculate the time difference to calculate the value of the difference between the time of arrival of the reference signal serving BS provided from the module generating the synchronization signal, and the time of arrival of the reference signal serving BS provided from the processing module reference signals.

47. The device SS on p.46, in which the reference signal is a preamble of a frame of the downlink (DFP), and the processing module reference signals measures the ratio of output chosen to replace the th to interference and noise ratio (CINR) of a serving BS, and if the measured CINR falls below a predetermined threshold, according to the MAC processor of the drop measured CINR.

48. The device SS on p.46, in which the module processing the reference signal tells the module to generate the clock about the time of receipt of the periodic reference signal.

49. The device SS on p.46, in which the response to a scan request from the MAC processor module processing the reference signals processes the reference signals received from the neighboring BS, tells the module for computing the time difference of the time of receipt of the reference signals of neighboring BS to be taken by scanning, and delivers the data received after the reference signal in the block fast Fourier transform.

50. The unit SS in 45, in which the RTD value is evaluated by the evaluation module, the time difference by the time difference of receipt of the signals.

51. The unit SS in 45, in which the RTD value to the target BS is calculated as follows:

RTD_BS2=RTD_BS1+2DTPA,

where RTD_BS2 indicates the RTD value to the target BS, RTD_BS1 indicates the RTD value for the serving BS, a DTPA refers to the difference between the time of receipt between the signal received from the serving BS, and the signal received from the target BS.

52. The unit SS in 45, in which the signals received from the serving BS and the target BS and used to calculate RA is the Apple of the time of receipt, are signals preambles frames downlink (DFP).

53. The unit SS in 45, in which the estimated RTD value to the target BS included in request message for transmission service that is passed in serving BS.



 

Same patents:

FIELD: communications systems.

SUBSTANCE: proposal is given of a method of compressing control information for an up-link in a wireless communication system, where a mobile user station scans neighboring base stations upon request by a service base station and sends information on the neighboring base stations to the service base station. In this method, the service base station sends a message with notice of neighboring base stations, which includes an identifier, of at least one neighboring base station, about which the service station intends to obtain information and an identifier of the above mentioned neighboring base station. The mobile user station then scans the channel, transmitted by at least one neighboring base station, and sends the scanning result together with the index of that neighboring base station to the service base station.

EFFECT: reduced unproductive expenses.

13 cl, 4 dwg, 1 tbl

FIELD: radio engineering.

SUBSTANCE: equipment and method for positioning in sector for wireless communication device and data transmission from base station to wireless communication device through signalling channel in wireless communication network without allocated data access channelisation. When base station is ready to transmit data through signalling channel to wireless communication device, at first it sends routing table update message to wireless communication device. Wireless communication device sends response back to base station, not starting any traffic channelisation procedure. The response is delivered with sector position information to base station. After response is received base station transmits data to signalling channel in sector where wireless communication device is connected.

EFFECT: internet protocol (IP) data package transmitting to signalling channel without transmitting of IP data packages to sectors where target wireless communication device is not connected, thus avoiding network flooding with unnecessary signalling messages.

22 cl, 4 dwg

FIELD: radio engineering.

SUBSTANCE: invention refers to cellular telephone communications. Method of relaxed service transmission includes the first control channelisation through network between the first base station controller (BSC) and the first base transceiver station (BTS). Besides method includes the second control channelisation through network between the second BSC and the second BTS. Dial-up between mobile station (MS) and the first BTS is accompanied with evidence of MS signal reception from the second BTS that is sent to the first BSC. As respond to evidence start signal is transmitted from the first BSC to the second BTS. And as respond to reception of start signal to the second BTS, additional traffic, associative connected with dial-up, is directed between MS, the second BTS and the first BSC without transmission of the additional traffic through the second BSC.

EFFECT: every BTS is capable to connect through numerous communication lines with many BSC, and every BSC is capable to connect through numerous communication lines with many BTS.

24 cl, 4 dwg

FIELD: radio engineering.

SUBSTANCE: invention refers to identification of transmitters for signals received by terminal. In order to evaluate transmitter of this received signal, candidate list of transmitters which could transmit this signal is made out. Besides coverage area is detected to be used for received signal. This coverage area is area where terminal can receive signal to be identified. Then predicted power for each candidate transmitter is evaluated, e.g. using route and coverage area loss prediction model. Predicted powers for candidate transmitters are compared (directly or relatively) to measured power of received signal. Candidate transmitter with (direct/relative) predicted power closest to (direct/relative) measured power is considered to be that one transmitted this signal. Distribution delays can be predicted and used for transmitter identification as well.

EFFECT: estimation of terminal location.

27 cl, 12 dwg

FIELD: radio engineering.

SUBSTANCE: method and device for wireless one-way channel location within transmitting of multimedia multipoint connection using base parameter configuration of wireless one-way only channel for rapid location of wireless one-way only channel, when mobile terminal travels between cells, are offered. Using parameter configuration of wireless one-way only channel for certain service within multipoint connection, applying base configuration so that parameters of protocol and channel, the same or with equal values are determined for every cell, various cells within communication system in which certain point-to-point connection service is rendered, can configure objects of wireless protocol, channels and wireless one-way only channel simultaneously, using the same parameters values.

EFFECT: method allows for minimal delay of wireless one-way only channel location and data loss during transmission service, thus keeping network resources and improving reception performance through smooth combination.

79 cl, 8 dwg

FIELD: radio engineering.

SUBSTANCE: invention refers to data transmission in wireless communication system with multiple-key access. Wireless communication terminal scans pilot signals transmitted by sectors in wireless communication system, measures scanned pilot signals, selects serving sector (e.g. sector providing the strongest reception) and identifies nonservicing sectors which can receive strong noise from this terminal. Servicing sector allocates terminal sub-band (sub-bands) which can be used by servicing sector and cannot be used by nonservicing sectors. Terminal transmits data symbols to allocated sub-bands to servicing and nonservicing sectors. These sectors process return communication line transmission from terminal and receive symbols of relaxed solution which represent transmitted data estimations. Symbols of relaxed solution can be combined from common sectors and then decoded to receive decoded packages. Sectors can decode symbols of relaxed solution independently, and decoded packages of these sectors can be combined to receive resultant decoded packages for terminal.

EFFECT: development of relaxed service forwarding for return communication line with restrictive reuse.

43 cl, 15 dwg, 1 tbl

FIELD: information technology.

SUBSTANCE: after a wireless communication device makes an emergency call to the emergency service centre, for example police station, the wireless communication device can answer when called back from the emergency service centre. The wireless communication device can answer when called back based on information about the class of the emergency call and the priority level of the call back.

EFFECT: possibility of operation of a wireless communication device when there is a limited access class for receiving incoming emergency calls within a predetermined time interval.

23 cl, 7 dwg

FIELD: physics, communication.

SUBSTANCE: invention is related to communication systems. Method of channel scores transmission on multiple subcarriers between transmitting device and receiving device is based on the fact that transmitting device determines channel scores on multiple subcarriers, and then codes these multiple scores into at least one coded channel signal, then transmitting device sends at least one coded signal to receiving device.

EFFECT: provides efficient presentation of channel data to transmitter with the purpose of their application in closed transmission.

10 cl, 11 dwg, 1 tbl

FIELD: physics, communication.

SUBSTANCE: invention is related to systems of wireless communication. Method and system for distribution of data bursts in system of wireless communication with availability of frame installed along symbol interval axis and frequency band axis, frame includes the first area, in which MAP-message is transmitted, and the second area, to which data bursts are distributed, the third area on the basis of symbol interval and frequency band is located in the second area, data bursts are serially distributed to the third area from the first interval of symbol along axis of frequency band.

EFFECT: provision of efficient distribution of data bursts in system of wireless communication.

14 cl, 2 dwg

FIELD: physics, communication.

SUBSTANCE: present invention is related to technology of development of efficient service of broadcasting group transfer of data for mobile stations from base station, which performs broadcasting group transfer of data in wireless network, in which every of mobile stations inputs information that designates property of quality of service (KO, QoS), for generation of message on the basis of input information, and for transfer of generated message to base station that performs broadcasting transfer of group data.

EFFECT: optimisation of data group transfer.

39 cl, 7 dwg

FIELD: radio communications.

SUBSTANCE: proposed method intended for single-ended radio communications between mobile objects whose routes have common initial center involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mentioned mobile objects and destroyed upon completion of radio communications. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning of several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

1 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer from mobile object to stationary one residing at initial center of common mobile-object route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mobile object. Proposed radio communication system is characterized in reduced space requirement which enhanced its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 6 dwg

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile object from stationary one residing at initial center of mobile-object route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 6 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method for single-ended radio communications between mobile objects whose routes have common initial center involves use of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile objects. Proposed radio communication system is characterized in reduced space requirement and, consequently, in enhanced effectiveness when operating simultaneously with several other radio communication systems.

EFFECT: reduced mass and size, enhanced noise immunity and electromagnetic safety for attending personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in simultaneous functioning of several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method for single-ended radio communications between mobile objects having common initial center involves use of low-power intermediate transceiver stations equipped with non-directional antennas and dropped from mobile objects. Proposed radio communication system is characterized in reduced space requirement and, consequently, in enhanced effectiveness when operating simultaneously with several other radio communication systems.

EFFECT: reduced mass and size, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object and destroyed upon completion of radio communications between mobile and stationary objects. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications engineering; digital communications in computer-aided ground-to-air data exchange systems.

SUBSTANCE: proposed system designed to transfer information about all received messages irrespective of their priority from mobile objects to information user has newly introduced message processing unit, group of m modems, (m + 1) and (m + 2) modems, address switching unit, reception disabling unit whose input functions as high-frequency input of station and output is connected to receiver input; control input of reception disabling unit is connected to output of TRANSMIT signal shaping unit; first input/output of message processing unit is connected through series-connected (m + 2) and (m + 1) modems and address switching unit to output of control unit; output of address switching unit is connected to input of transmission signal storage unit; t outputs of message processing unit function through t respective modems as low-frequency outputs of station; initialization of priority setting and control units, message processing unit clock generator, and system loading counter is effected by transferring CLEAR signal to respective inputs.

EFFECT: enhanced efficiency due to enhanced throughput capacity of system.

1 cl, 2 dwg

FIELD: radiophone groups servicing distant subscribers.

SUBSTANCE: proposed radiophone system has base station, plurality of distant subscriber stations, group of modems, each affording direct digital synthesizing of any frequency identifying frequency channel within serial time spaces, and cluster controller incorporating means for synchronizing modems with base station and used to submit any of modems to support communications between subscriber stations and base station during sequential time intervals.

EFFECT: enhanced quality of voice information.

12 cl, 11 dwg

Up!