Improvement of radio communication line protocol for decreasing time needed for establishing connection on data calls

FIELD: wireless communications.

SUBSTANCE: estimate of time needed for transfer and confirmation of receipt is synchronized by both sides of radio communication line protocol without necessity for three-side synchronization of communication establishing process usually necessary for said synchronization. Method includes procedures used by both sides of communication line to dynamically renew and correct their starting estimates of time needed for transfer and confirmation of receipt.

EFFECT: higher efficiency, broader functional capabilities.

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The technical field to which the invention relates.

The invention relates to wireless communications. More specifically, the present invention relates to an improved method and system that require reduced time to establish connection with the formation of call data Protocol radio link (RLP, PCR).

The level of technology

One of several methods to facilitate communication systems, in which there are a large number of system users is the use of modulation techniques, multiple access systems with code division multiplexing (CDMA, mdcr). In the prior art known to other ways of communication systems, multiple access, as for example, schemes, multiple access with time division multiplexing (TDMA, mdvr), schemes with multiple access frequency division multiplexing (FDMA, FDMA equipment), as well as with amplitude modulation, such as schemes with single-sideband signal with komandirovannoi amplitude (ACSSB, OSCA). In order to promote mutual functioning of the equipment manufactured by different companies, these methods were standardized. Communication systems, multiple access, code division channels were standardized in the U.S. telecommunications industry Association (Telecommunications Industry Association) document TIA/EIA/IS-95-B, SAG allonym "MOBILE STATION-BASE STATION COMPATIBILITY STANDARD FOR DUAL-MODE WIDEBAND SPREAD SPECTRUM CELLULAR SYSTEMS", hereinafter referred to here as "standard IS-95". In addition, the U.S. telecommunications industry Association has proposed a new standard for communication systems, multiple access, code-division multiplexing PN-4431, prepared for publication as TIA/EIA/IS-2000-5, entitled "UPPER LAYER (LAYER 3) SIGNALING STANDARD FOR cdma2000 SPREAD SPECTRUM SYSTEMS", dated July 11, 1999, hereinafter referred to as "standard IS-2000".

The international telecommunication Union (The International Telecommunications Union) has recently recommended to the consideration of the proposed methods to ensure high-speed data stream and high quality voice services over wireless communication channels. The first of these proposals was published by the telecommunications industry Association and entitled "The CDMA2000 ITU-R RTT Candidate Submission". The second of these proposals has been published by the European Institute of telecommunications standards (ETSI) and entitled "The ETSI UMTS Terrestrial Radio Access (UTRA) ITU-R RTT Candidate Submission", it is also known as "broadband system mdcr", hereafter referred to us as "W-mdcr". The third proposal was submitted by the USA document TG 8/1, entitled "The UWC-136 Candidate Submission", hereinafter referred to us as "EDGE". The content of these proposals are disclosed in the public records, are well known in the prior art.

Initially with the standards IS-95 has been optimized for the transmission of speech frames with variable speed. To support two-way voice communication, which is a standard for cordless telephone applications, it is desirable that the communication system was provided to some extent constant and minimum time delay data. Based on this system standard IS-95 is designed with a powerful protocols forward error correction (FEC, PIO) and vocoders, designed to correctly respond to errors of speech frames. Protocols, error control, which require repeated procedures for the transfer of personnel, introduce unacceptable delays in the transmission of speech, so they are not adapted to the technical conditions of the standard IS-95.

Optimizations that make the technical conditions of the standard IS-95 is ideal for speech applications, make it awkward to use for applications with data packets. In many non-voice applications such as data transfer by internetwork Protocol (IP, MP), the requirements on the time delay of the communication system are much less stringent than in speech applications. In the transmission control Protocol data (TCP, UPD), which is probably the most widespread Protocol used in networks internetworking protocols to ensure error-free transmission allowed virtual endless transmission delay. To t the th in order to provide reliable transmission, when typically requested MP packets, the Protocol UPD uses retransmission MP datagrams.

MP datagrams are usually too big to fit in one frame of the standard IS-95. Even after the division MP datagrams into segments small enough, such that they were placed in the sequence of frames of standard IS-95, the entire sequence of frames of the standard IS-95 should be accepted without error in order to separate MP datagram was useful for Protocol PUPD. The frequency of human errors, typical for systems standard IS-95, makes the probability of error-free reception of all segments of the individual datagrams very low.

As described in the standard IS-95, alternative service settings allow that can be transferred to other data types instead of the speech frames. The document TIA/EIA/IS-707-A, entitled "DATA SERVICE OPTIONS FOR SPREAD SPECTRUM SYSTEMS" and later referred to as "IS-707", describes the procedure used in the transmission of packet data in the system standard IS-95.

Protocol radio link (RLP, PCR) are described in the document TIA/EIA/IS-707-A.8, entitled "DATA SERVICE OPTIONS FOR SPREAD SPECTRUM SYSTEMS: RADIO LINK PROTOCOL TYPE 2", hereinafter referred to as PCR-2. The PCR Protocol 2 includes a Protocol error control procedure retransmission of the frame, through the frame of the standard IS-95. The PCR Protocol refers to the Klah is su protocols, error control, known as the protocols of the ARQ (automatic request for repetition), based on the lack of acknowledgment (NAK, OPP), which are well known in the prior art. The PCR Protocol for IS-707 when using the communication standard IS-95 more facilitates the transfer of a byte stream, than the sequence of speech frames.

Some protocols link-local are usually higher PCR levels. MP datagram, for example, is usually converted to a byte stream Protocol point-to-point link (PPP, CTPS) before they will be presented as a stream of bytes in the level of the PCR Protocol. Because PCR level ignores Protocol and breaking frames higher levels of the Protocol data stream, a portable PCR, referred to as "a stream of bytes without features".

The PCR Protocol was originally designed to meet the requirements of sending large frames through the channel of the standard IS-95. For example, if MP datagram from 500 bytes should be simply sent in frames of the standard IS-95, the bearing 20 bytes each, it would fill 25 consecutive frames of the standard IS-95. If there is any type of level error control, then to MP datagram was useful for higher levels of the Protocol, all of these 25 frames had to be accepted without errors. For a channel in the standard IS-95, with the frequency in which znackovania human errors 1%, effective frequency errors in the received MP datagram is equal to (1-(0,99)25or 22%. This is a very large error rate, compared to most networks that use to send traffic to an Internet Protocol. The PCR Protocol was developed as a Protocol level of the communication line, which would reduce the frequency of errors MP graphics so that it was comparable to the error rate, typical for the LAN channel standard 10 Base 2.

The PCR Protocol is a Protocol based on the lack of acknowledgment (OPP), in which frames are sent to the RPF in order to stimulate the re-transmission of frames lost due to communication errors. Synchronization transmission OPP frames based on the estimated time to transmit and ACK (RTT, RTT), defined from the beginning of the PCR session. The timing of the runway in the current version of PCR protocols requires tripartite acknowledgement (confirmation) communication, in which both parties share specific types of frames based on the received frame types. To complete tripartite handshakes't sent any data. This tripartite handshaking communication requires time, which otherwise could be used for data transfer.

In a typical configuration service is portable the second computer connects to the wireless modem, which communicates with the network through the connection Protocol PCR. In a typical application of a portable computer, such as browsing web pages on the Internet, the computer is not communicating with the network continuously. Instead, the computer typically sends a short request to the address containing the data on a web page. Wireless modem responds by forming a communication session according to the PCR Protocol with the local base station and transmits the request through the base station in the network. Then through this PCR session wireless modem receives the requested data (such as the content of the web page) and displays the data to the user. While the user reads the displayed data between the wireless modem and the base station or network communication is not performed.

To ensure the most efficient use of the radio spectrum, a typical network uses timers activity", which cut PCR session after the specified period of passive state of the communication line. If this happens before attempting laptop again to send the data through a wireless modem, you will have a new PCR session in order to maintain the transmission of new data. Re-establishing a new PCR session causes an additional delay in the communication network, which can b the th-described "slowness" portable computers.

The attraction of a new PCR session in order to send new data always takes more time than sending new data over the existing PCR session. Existing versions of PCR protocols require tripartite handshakes to establish PCR session. Thus, it is highly desirable to minimize service information required to establish PCR session, including minimization or elimination of delays inherent in the three-way handshake communication.

The invention

The present invention can be used in order to ensure the possibility of transferring PCR data without the requirement of making the tripartite handshakes. The present invention is applicable to any communication system using the transfer byte stream wirelessly. The present invention is applicable to such systems as mdcr-2000, broadband mdcr system and EDGE, in which a stream of bytes can be transported by air within the frames specified for use in wireless communication systems.

The present invention includes methods of coordination of initial assessment runway used for PCR call. Initial evaluation of the runway, along with other PCR parameters such as scheme OPP and encryption parameters, and consistent what about the time of the implementation of the coordination service. Upon completion of the negotiation of service both sides PCR communication line provided an initial assessment of the runway and can start sending PCR data frames without performing tripartite handshakes.

The present invention includes the ways in which the base station can determine and update the values of the initial evaluation runway proposed during the negotiation of the service. The present invention also includes the ways in which both sides PCR communication line can dynamically update and Refine the initial assessment of the runway specified during the negotiation of the service.

Brief description of drawings

The invention is further explained in the description of specific variants of its implementation with reference to the accompanying drawings, in which

figure 1 depicts a diagram of data transmission system arranged according to a variant implementation of the present invention,

figure 2 depicts a diagram showing the message flow used to generate estimates of the runway using triangular handshake communication Protocol PCR,

figa depicts a diagram showing the message flow used to form the originating subscriber stations PCR call with the assessment of the runway according to a variant implementation of the present invention,

fig.3b depicts the diagram, p is practice showing a message flow, used to generate outbound from the base station PCR call with the assessment of the runway according to a variant implementation of the present invention,

figa depicts a block diagram of the sequence of operations performed in the subscriber station to initialize and use of PCR communication line according to a variant implementation of the present invention,

fig.4b depicts a block diagram of the sequence of operations performed in the base station to initialize and use of PCR communication line according to a variant implementation of the present invention,

figure 5 depicts a block diagram of the sequence of operations used to update the RTT estimates during the session PCR according to a variant implementation of the present invention,

6 depicts a block diagram of the device used for the formation and use of PCR communication line through mdcr wireless communication channel according to a variant implementation of the present invention.

A detailed description of the preferred embodiments

Figure 1 depicts a diagram of data transmission system arranged according to a variant implementation of the present invention. As shown, the subscriber station 102 establishes communication with the network 108 via a wireless channel connection 106 and base station 104.

The subscriber station 102 and base station 104 forms the t line communication Protocol radio link (PCR), to pass the byte streams of data through a wireless channel 106 communication. The data bytes are transmitted between the subscriber station 102 and the network 108 via base station 104 may be a by internetwork datagram Protocol (MP), converted to a byte stream using such conversion protocols as Protocol point-to-point communication (CTPS). As the Protocol (MP), and the Protocol CTPS are well known in the prior art.

Before you can transfer data between the subscriber station 102 and base station 104, between them should be generated PCR communication line. The formation of PCR communication line includes establishing time for transmission and the ACK (WFP), which should be used as the subscriber station 102 and base station 104 to synchronize the lack of acknowledgment (NAK, OPP). In the illustrative embodiment of the present invention the subscriber station 102 sends the base station 104 request message to the service indicating that the subscriber station 102 may take the initial evaluation, WFP sent in the message service response from the base station 104. After receiving this message, a service request, the base station 104 sends the subscriber station 102 message service response, including the initial evaluation of the runway to be used by subscriber stations is th 102. After the base station 104 has provided an initial assessment of the runway for the subscriber station 102, there is no need to perform time consuming tripartite handshaking communication. Then, when any party transmits the frame of the RPF, it uses the delay between frame transmission OPP and reception of the corresponding frame retransmission to update its assessment of the runway for the PCR line.

Figure 2 depicts how the initial evaluation of WFP in the well-known PCR communication lines using a tripartite handshakes. The subscriber station 102 transmits frames synchronization SINGH 202, frames 204 synchronization/acknowledgement (SYNC/ACK)frames 206 CONFIRM and frames 208 data to the base station 104 over a reverse link. The base station 104, in turn, transmits frames SINGH 220, frames, SYNC/ACK 222, ACK frames 224 and data frames 226 in the subscriber station 102 in a straight line. In the above example, the 230 to send and ACK (WFP) has a length of 8 frames. The entire period 232 synchronization generating a first assessment of the runway has a length of 12 frames, or he has the duration of a half period of the runway (one period and half-period).

During the beginning of the PCR synchronization 240 both sides transmit frames SINGH 202 and 220. As shown, the subscriber station 102 before the t of one frame SYNC in each period of the frame. The base station 104 also begins the process of synchronizing the transmission of one frame SYNC 220 in each period of the frame.

At time 242 after the initial half of the first period runway 230, and after the subscriber station 102 has sent four frame SYNC from a to 202d, the subscriber station 102 receives the first frame SYNC 220, transmitted by the base station 104. After reception of this first frame SYNC 220 subscriber station stops the transmission frame SYNC and instead transmits one frame SYNC/ACK 204 in each period of the frame. Also at time 242 base station 104 receives the first frame SYNC a transferred to the subscriber station 102. After reception of this first frame SYNC a base station 104 stops transmitting frames SINGH and instead transmits one frame SYNC/ACK 222 in each period of the frame.

At the time 244 subscriber station 102 receives the first frame SYNC/ACK 222 transmitted by the base station 104. After reception of this first frame SYNC/ACK 222 subscriber station stops the transmission frame SYNC/ACK, and instead transmits one ACK frame 206 in each period of the frame. Also at the time 244 base station 104 receives the first frame SYNC/ACK 204, transmitted to the subscriber station 102. After reception of this first frame SYNC/ACK 204 base station 104 stops transmitting ka the ditch SYNC/ACK, and instead transmits one ACK frame 224 in each period of the frame.

At the time 246 subscriber station 102 receives the first ACK frame 224, transferred to the base station 104. After receiving the first ACK frame 224 subscriber station stops the transmission of ACK frames and can start sending frames 208 data in each frame period. Also at time 246 base station 104 receives the first ACK frame 206, transferred to the subscriber station 102. After receiving the first ACK frame 206 of the base station 104 stops the transmission of ACK frames and can begin forwarding frames 226 data.

The period of time between 240 and 246 lasts one period and half-period of the runway 232, which is used to synchronize subsequent frames OPP. In other words, the time between the transmission of the first frame SYNC 240 and the transmission of the first frame 246 data lasts one period and half-period of the runway 232. If the RTT 230 is 8 frames, as shown, the time required to perform the tripartite handshakes 232 is 12 frames.

If any of the frame SYNC, SYNC/ACK or ACK is lost due to communication errors during the tripartite handshakes, the synchronization time can be longer. Additionally, such communication errors may cause the resulting estimate of the runway is longer than the actual runway PCR line of the runway, which is longer than the actual runway PCR communication line, leads to unnecessary delays in the shipment of additional personnel OPP, when the previous frame OPP is lost (again due to communication errors). Such delays can cause slowness in the Protocol and can degrade throughput PCR communication lines.

Figa depicts a diagram of the improved flow of messages that are used to generate estimates of the runway for the originating subscriber stations PCR call, according to a variant implementation of the present invention. Instead of performing a tripartite handshakes base station 104 sends to the subscriber station 102 initial evaluation WFP for use in the message in the air before the formation of the PCR line.

In the illustrative embodiment, the subscriber station 102 starts to send the message 302 a service request to the base station 104. In a preferred embodiment of the present invention, this message includes the pointers to the fact that the subscriber station 102 supports the initial runway from the base station 104 without tripartite handshakes. In a preferred embodiment of the present invention, the message 302 service request does not necessarily include dopolnitelnyefunktsii, such as specifying one or more OPP schemes supported by the subscriber station 102. Message 302 a service request, also don't necessarily includes the encryption settings for PCR communication lines.

The RPF scheme is characterized by the number of RPF personnel sent after each expiration of the RPF timer, if not received its corresponding frame retransmission. An example of the RPF scheme is the RPF scheme 1, 2, 3, which sent the first message OPP. If the timer OPP is associated with the fact that the first "cycle" of the RPF graduated from the action without receiving the corresponding frame retransmission, then passed to another cycle OPP, consisting of two frames OPP. If the timer OPP is associated with the fact that the second "cycle" of the RPF graduated from the action without receiving at least one corresponding frame retransmission, then passed the third cycle of the RPF from three frames OPP. Other possible OPP schemes include patheticaly scheme 1, 1, 1, 1, 1, dvuhlitrovuyu scheme 1, 2. Alternative message 302 request for service may show the absence of the RPF scheme, suitable for simultaneous PCR Protocol, which is well known in the prior art.

After receiving 302 a service request, showing no three-way handshakes, the base station 104 transmits a message 304 response service, sod is rashee any additional or proposed modifications of the parameters of the line. After a message is received 304 response service the subscriber station 102 transmits a second message 306 service request indicating the acceptance or rejection of the settings suggested in the message 304 response service. Upon receipt of a message 306 a service request, the base station 104 transmits a message 308 connection service that shows the final parameters of the communication line to be used. All messages 304 and 308 service response, and the message 308 connection service can optionally display the RPF scheme or encryption settings, as discussed above.

After sending the message, 308 connection service base station 104 can immediately start to transmit frames 210 data in the subsequent frame periods. Upon receipt of a message 308 connection service the subscriber station 102 can immediately start to transmit frames 312 data to the base station 104. As discussed in IS-2000, the transmission frame 310 and 312 data also may be delayed until such time as one or both parties will not be accepted "time steps", specified in one or more of the previous message, or the message is complete connections service (not shown). The specialist should be clear that the additional parameter "duration" or the message is complete, connect the service may be used without straying from altoadige of the invention.

When receiving the first message 302 a service request, the base station 104 may also decide to immediately send a message 308 connection service. This short abrupt transition eliminates the need to spend time on a message 304 response service and message 306 service request. Such a short abrupt transition works only when the parameters of the proposed base station 104 in the message 308 connection service supported by the subscriber station 102 and suitable for the type of data transferred by PCR communication lines.

In the preferred embodiment, if a different message is not indicated no scheme OPP, both parties accept the specified schema, OPP default, for example, the above scheme 1,2,3. The adoption of such specified scheme OPP default protects the message area and the width of the strip during the negotiation of the service.

In a preferred embodiment, the format of each message (message 302 service request messages 304 and 308 of the service response and the message 308 connection service) is described in the above specifications IS-2000. In the preferred embodiment, each of the messages includes a section PCR/BV, which is a new form BLB adapted for the purposes of harmonization PCR. In IS-2000 reduction BLB (BLOB) Ref is no "block of bits". In a preferred embodiment, PLRV used includes an initial assessment of the runway and the scheme OPP. An illustrative format for PLRV described in the table below.

FieldLength (bits)
PLLBLIC3
Runway4
OPTICLEAN3
OPTIKER3
OPTICLEAN events next:
OPNELY3
OPTICLEAR events next:
APPRASIAL3

In the table field PLLBLIC shows the version number of the format PLRV used to interpret the remainder of the content section PLRV. WFP is the initial value of the runway, which should be used in the call. OPTICLEAN shows the number of cycles of the RPF, which should be used for transmission by direct PCR of the connection line. OPTICLEAR shows the number of cycles of the RPF, which should be used for transmission on the reverse PCR line. As shown, field OPTICLEAR should the number of fields OPNELY corresponding to the value in the field OPTICLEAN. In the last of the fields OPNELY should the number of fields OPP ON the ikl clicks, corresponding to the value in the field OPTICLEAR. If the field OPTICLEAN is zero, then the fields APPRASIAL (if any) will immediately follow the field OPTICLEAR.

For example, the message indicating that the RPF scheme 1, 2, 3 is available on both the forward and backward lines, field PLRV is set OPTICLEAN equal to 3, and is OPTICLEAR equal to 3. For field OPTICLEAR followed by three fields OPNELY having values 1, 2, and 3, respectively. For the last field OPNELY followed by three fields APPRASIER having values 1, 2, and 3, respectively.

In addition to using the above-described message types the initial times of the runway, schemes OPP and encryption settings can be aligned using PLRV sections in other types of messages. These types of messages include a message to the main direction of the transfer service (GHDM, SONPO) and the universal message of the direction of transmission service (UHDM, SHUNPO)described in the above-mentioned standard IS-2000.

In the preferred embodiment, any of the previously described messages that omit section PLRV interpreted as showing the execution of the tripartite handshakes. Then the scheme OPP may be specified by the schema by default or can be according to the van during the tripartite handshakes.

In an alternative embodiment, base station 104 can further reduce the number of messages required to specify runway and the RPF scheme for PCR call. Saving settings modes supported in previous calls PCR directed to each subscriber station, the base station 104 may initiate a call transfer message 308 connection service that specifies PCR parameters. After sending the message 308 connection service without receiving 302 a service request message or service response from the subscriber station 102, the base station 104 begins to transmit user data.

To determine the initial evaluation of the runway to set subscriber stations at the beginning of the PCR call, the base station 104 may use several methods. In a preferred embodiment, the base station 104 receives the initial evaluation of the runway, adding the specified protective time interval to the average of the values of the runway, calculated during the tripartite handshakes for previous calls. In an alternative embodiment, the initial assessment of the runway shall be made in the base station 104 by the operator of the wireless service.

Fig.3b depicts a graph showing the variation of the improved flow of messages that are used to generate estimates of the runway for outgoing the C base station PCR call, according to a variant implementation of the present invention. In contrast originating from the subscriber station call, outgoing from the base station challenge message 342 service request is transmitted to the base station 104, and the message 344 service response is transmitted to the subscriber station 102. Message 308 connection service has the same format and content, as discussed earlier. As shown, base station 104 begins transmitting frames 310 PCR data in a straight line immediately after the message 308 connection service. When the message is received 308 connection service the subscriber station 102 starts sending frames 312 PCR data on the reverse link.

In the illustrative embodiment, the message service request 342 includes the assumption that both sides of the communication line using the initial evaluation of the runway instead of using triangular handshakes. As shown, the subscriber station 102 receives a proposal message 344 service response, and triangular handshake communication is not performed between the message 308 connection service and frames 310 and 312 PCR data.

All the same PCR parameters described in connection with exiting your subscriber stations PCR calls can be consistent in the messages shown to the originating base station PCR will cause the and. For example, the message 342 service request includes a proposed OPP scheme, which is received in the message 344 service response.

Figa depicts a block diagram of the sequence of operations performed in the subscriber station to initialize and use of PCR communication line, according to a variant implementation of the present invention. All operations are shown for departing from the subscriber stations PCR calls, such as for example, shown in figa, and outbound from the base station PCR call, as for example shown in fig.3b.

In the outgoing of the subscriber stations PCR call 400 subscriber station initiates negotiation of service, sending the first message 402 a service request, showing the ability of the subscriber station to coordinate the initial assessment of the runway during the negotiation of the service or other proposed PCR parameters. Then the subscriber station receives and decodes the 404 response from the base station. Type of response is evaluated at operation 406, in order to decide whether to agree PCR parameters. If the received message was a response message service may offer changes to pre-sent parameters, the subscriber station sends another message 402 of the service request. The new message of the service request contains a set of parameters that either Glashutte, or modify new PCR parameters, the proposed base station. Then the subscriber station waits until, until it reaches a different response 404 to the most recent message of the service request.

Ultimately, if the operation 406, it turns out that the answer is a message service that contain used options. The message service is estimated at operation 408 to determine whether the message service execution tripartite handshakes. If the connection message service shows the implementation of the tripartite handshakes, then the tripartite handshaking handshaking is performed at operation 410 before sending user data in operation 412. If the connection message service shows that three-way handshake communication is not necessary, and instead specifies the initial evaluation of the runway, then the subscriber station can immediately start sending user data 412.

As mentioned earlier, the message service can show that three-way handshaking handshaking is not required, but does not include the initial evaluation of the runway. In this case, the subscriber station will use the specified initial evaluation of ITPO default.

If coming from the base station PCR call 420 subscriber station receives and decodes the first message 422 a service request from the base station. This message is a service request could show that the base station supports specifying the initial evaluation of the runway during the negotiation of the service. The subscriber station responds with a message message 424 service response indicates that the caller also supports the use of the initial evaluation WFP adopted during the negotiation of the service. Then the subscriber station receives and decodes the following response message 426 sent to the base station. Type of response is evaluated at operation 428. The answer may be another message service request, for example, shows the proposal for a specific OPP schemes or other additional PCR parameters. Then, the subscriber station sends another message 424 service response indicating acceptance or non-acceptance of additional PCR parameters. After the connection message service is accepted, the processing proceeds from operation 428 to the previously described operation 408.

Fig.4b depicts a block diagram of the sequence of operations undertaken by the base station to initialize and use of PCR communication line, according to a variant implementation of the present invention. These operations is provided for the originating subscriber stations PCR call, for example, such as shown in Fig, and outbound from the base station PCR call, for example, such as shown in fig.3b.

In case of subscriber stations PCR call 450 base station receives and decodes the first message 452 service request, showing the ability of the subscriber station to coordinate the initial assessment of the runway during the negotiation of the service or other proposed PCR parameters. Next, at operation 454 evaluated PCR parameters shown in the message service request to determine whether to agree any changes to the settings. If Yes, then the base station sends a new set of proposed PCR parameters in the response message of service and operations 456 sends it to the user.

If PCR parameters, evaluated at operation 454, acceptable to the base station, the base station sends a message 470 connection service, showing the used PCR parameters. Then, based on the message content connect service base station in operation 472 decides whether to perform a tripartite handshake 474 communication, and then begins transferring the user data. If the message service is not indicated in the presence of tripartite handshakes, the base station goes directly from Opera and 472 to transfer user data 476.

If coming from the base station PCR call 460 base station starts the orchestration service, sending a message 462 service request in a subscriber station. This message is a service request indicates that the base station supports specifying the initial evaluation of the runway during the negotiation of the service. Then, when the operation 464 base station receives and decodes the message service response received from the subscriber stations.

PCR parameters shown in the message service response, measured during the operation 466 to determine whether it is necessary to agree on any changes to the settings. If Yes, the base station returns to operation 462 and sends a new set of proposed PCR parameters in the request message to the service. Otherwise, at operation 470, the base station sends a connection message service and continues to operate with this operation, as described previously.

Figure 5 depicts a block diagram of the sequence of operations used to update the RTT estimates during the session, PCR, according to a variant implementation of the present invention. In the case when the initial evaluation of WFP agreed during the negotiation of the service is beneficial to both parties were able to adjust their estimates of the runway according to the measurements made during a call. This method uses the information, obrannou during transmission OPP, and re-transmits frames to dynamically update the assessments of the runway during a PCR call, leading to the update process of the runway, which is integrated into the process of the RPF. For convenience, the following describes the procedure on the example of a subscriber station in a PCR call. Specialist in the art should be understood that embodiments of procedures can be performed in the subscriber station, the base station or both parties without departing from the scope of the present invention.

The update procedure of evaluation WFP begins when the subscriber station detects a gap consecutive numbering at operation 502. At operation 504 subscriber station begins the account of the runway to measure how long you need to take the frame re-transmission for one or more frames sent to the RPF. Also a subscriber station initializes the timer OPP with the current rating of the runway and at operation 506 starts the timer OPP. Then at operation 508 subscriber station sends the number of RPF personnel associated with the first cycle in the current scheme, OPP.

Operation 510 evaluates, accepts the corresponding frame retransmission before the timer OPP finishes the countdown. If so, then at operation 520 checks the meter runway. If the meter runway is not working, when receiving the frame retransmission, then the meter runway and the timer stop OPP as required. If Chechik WFP continues to work, when receiving the frame retransmission, then the estimate of the runway used for PCR of the call is updated at operation 522 according to a new assessment. In the illustrative embodiment, a new assessment of the runway is calculated by performing the calculation of the weighted average of the old assessment runway and the amount of the countdown timer runway and the specified guard time interval. Specialist in the art will understand that you can use other United ways without departing from the scope of the present invention. These other methods include the replacement of evaluation WFP sum of the values of the timer runway and guard time interval.

After the upgrade assessment runway during operation 522 meter runway and the timer stop OPP, and the update process of the runway, integrated in the process of the RPF ends at operation 540. If, at operation 520, it appears that the timer OPP does not work, then update the runway during operation 522 is skipped and the method proceeds directly to operation 520 to operation 524.

If at operation 510 a subscriber station detects that the timer OPP finished the countdown before adopted a frame retransmission, then the subscriber station estimates at operation 530, how many cycles OPP has passed without receiving the corresponding frame retransmission. The limit on the number OPP cycles in the current scheme, the RPF was the limit at the beginning of the call, or through the above field OPTICLEAR through the above given scheme OPP default. If the number of elapsed cycles of the RPF is equal to this limit, then the limit of the RPF reached. If the limit of the RPF reached, then for the corresponding space is no longer allowed cycles of the RPF and the subscriber station proceeds to operation 524.

If at operation 530 OPP limit has not been reached, then the subscriber station is in operation 532 estimates are updated if an evaluation of WFP for PCR call. If it was recently updated, the subscriber station stops the counter runway during operation 534 before restart the timer OPP at operation 506 and send the next cycle of the RPF personnel at operation 508. Stop counter runway before sending another cycle RPF personnel prevents inaccuracies in the estimates of the runway because of the ambiguity of frame retransmissions. For example, if the frame re-transmission would be adopted after he was sent a second cycle of the RPF frame, the subscriber station could not know whether the frame re-transmission OPP in the first cycle or the second cycle. A misalignment of such a frame retransmission with the later cycle of the RPF could lead to an incorrect estimate of the runway.

However, when you stop counter runway after the expiration of the first timer OPP raises another problem. If for some reason the initial assessment runway specified during the negotiation of the service was quite small, what about the first timer OPP could complete the action before than the first frame retransmission will have the chance to reach the subscriber station. In such circumstances erroneously low estimate of the runway would never be updated, which can cause bad characteristic length PCR call.

This problem is solved in the illustrative embodiment, that allows continuous operation of the meter runway, if the subscriber station determines at operation 532, the evaluation of the WFP has not yet been updated. If the evaluation of WFP has not yet been updated, the operation 534 is skipped, and the user re-starts the timer OPP at operation 506 and sends the next cycle of the RPF personnel at operation 508. In the worst case this can lead to an updated assessment of the runway, which is excessively long, but it is preferable to estimate runway that is too short. Accordingly, in a preferred embodiment, first, when the estimation of the RTT is updated, the operation 522 gives existing assessment WFP little or no weight in the weighted average. In an alternative embodiment, the weighting of existing evaluation in the first update varies based on the amount by which the first evaluation of WFP higher than the current estimate of the runway, and based on the number OPP cycles, sent before receiving frame retransmission.

In the alternative the implementation of the decision at operation 532 is not based on fact, updated ever assessment of the runway, and on whether the space corresponding to the stopped timer OPP, the first space found in PCR session. If the space was first discovered by a space, then the counter runway does not stop before proceeding to operation 506. If you have found other gaps, the counter runway stops before proceeding to operation 506.

6 depicts a block diagram of the device used for the formation and use of PCR communication line through mdcr wireless communication channel according to a variant implementation of the present invention. For convenience below, the device described in the example subscriber stations. Specialist in the art should be understood that shows the configuration and its variations can also be used in connection with a wireless base station without departing from the scope of the invention.

The depicted device includes an interface 602 data, which can be connected to an external device input/output, such as a terminal display or laptop or desktop computer. The interface 602 data may be excluded, if the subscriber station 102 further comprises an internal user interface, such as a specialized keyboard or display. For example, the subscriber station 102 may be mdcr besprovodnoy electronic assistant (PDA, AC)that can communicate with the Internet and displays them on the LCD display (LCD, LCD).

Regardless, are the raw user data via the interface 602 data or some other internal interface I/o, the data is properly processed by the control processor 604. Control processor 604 performs the necessary formatting and generation of data packet according to the Protocol to send data over the wireless link. In the preferred embodiment, control processor 604 takes a stream of bytes passed through the interface 602, and generates a data packet in PCR frames for transmission in module 620 modulation mdcr. Control processor 604 also extracts data from PCR frames taken through the module 640 demodulation mdcr, and delivers the resulting stream of bytes in the interface 602 data. In addition to PCR personnel control processor 604 also negotiates service by transmitting and receiving the above message service request, service response, service and other messages via module 620 modulation mdcr and module 640 demodulation mdcr.

Control processor 604 is connected to the module 620 modulator mdcr and gives it personnel transfer. In the preferred embodiment on the present invention, control processor 604 delivers the frames to the transmission module 610, a forward error correction (FEC, PIO), which encodes the frames on the basis of the code PIO. PIO module 610 uses any of several methods of forward error correction, including turbomotive, convolutional coding and other form of software solutions or block coding. The resulting encoded frames are served PIO module 610 interleaver 612, which punctuates data in order to provide temporal diversity in the transmitted signal. Interleaver 612 applies any of the methods alternation, such as block interleaving or alternation with inverted bits. The output signal of the interleaver 612 is binary and is served in the device 614 expansion Walsh, which extends the signal using Walsh codes. After the expansion Walsh output device 614 expansion Walsh served in pseudocumene device 616 expansion, where it is expanded using pseudotumour codes. Then the output signal pseudotumor device 616 expansion is served in the transmitter 618, where it is converted with increasing frequency, is amplified and fed to the diplexer 650, and then transmitted through the antenna 652.

In a preferred embodiment of the present invention pseudocumene device 616 expansion is a complex PSH the expansion unit, which multiplies the complex signal output device 614 of the extensions is LSA on the complex PN code. In an alternative embodiment, pseudocumene device 616 expansion multiplies the complex signal output device 614 expansion Walsh on the real (not complex) PSH code.

The signals received through the antenna 652, pass through the diplexer 650, and then made him gain control and conversion with decreasing frequency in the receiver 638. From there the signals are fed into the module 640 demodulator mdcr in which they are compressed with the PN code PN device 636 compression, compressed with a Walsh code in the device 634 compression Walsh, are converted to the alternation in facing the interleaver 632 and decoded ID PIO the PIO decoder 630. PIO decoder 630 delivers the resulting footage taken in the control processor 604.

In a preferred embodiment of the present invention PSH device 636 compression is a complex PSH compression device, which multiplies the flow of complex samples from the receiver 638 on the complex PN code. In an alternative embodiment, pseudocumene device 638 compression multiplies the flow of complex samples from the receiver 638 on the real (not complex) PN code. Facing interleaver 632 applies any of the methods addressed alternation, as for example, block facing the alternation or reversed alternation with inverted bits. PIO decoder 610 IP which leverages your any one of several methods of forward error correction, including turbomotive, convolutional coding and other form of software solutions or block encoding.

The above description of preferred embodiments given in order to give the specialist in the art to implement or use the present invention. Various modifications to these embodiments will become obvious to a person skilled in the art, and described here, the fundamental principles can be applied to other variants of implementation without the use of inventive abilities. Thus, the present invention should not be limited to the options shown here, but must confine itself according to the principles and new features revealed here.

1. Way stream of information bytes, namely, that carry out the request a communication session Protocol radio link (PCR), take a message indicating the estimated time to transfer and acknowledgement (WFP) for PCR, and the evaluation of the WFP does not endorse during establishment of the communication session PCR, determine the synchronization message to the lack of acknowledgment (OPP), using a measure of the runway, and conduct a communication session PCR using estimates of the runway for determining a synchronization message to the absence of p is dorigine reception (OPP).

2. The method according to claim 1, characterized in that the message is the message coordination service.

3. The method according to claim 1, wherein the message is a message service.

4. The method according to claim 3, characterized in that the connection message service additionally indicates the schema of the RPF and in addition use scheme OPP.

5. The method according to claim 1, characterized in that it further agree with the use of message coordination service scheme OPP used during a subsequent communication session PCR.

6. The method according to claim 1, characterized in that coordinate using the message coordination service encryption settings used during a subsequent communication session PCR.

7. The method according to claim 1, wherein the message is a request message to the service.

8. The method according to claim 1, wherein the message is a response message to the service.

9. The method according to claim 1, wherein the message is a message to the main direction of the transfer service.

10. The method according to claim 1, wherein the message is a universal message transmission route service.

11. Way stream of information bytes, namely, that carry out the request a communication session Protocol radio link (PCR), sends a message that indicates an estimate of the time n the transmission and the ACK (WFP) for PCR, moreover, the evaluation of the WFP does not endorse during establishment of the communication session PCR, determine the synchronization message to the lack of acknowledgment (OPP), using a measure of the runway, and conduct a communication session PCR using estimates of the runway for determining a synchronization message to the lack of acknowledgment (OPP).

12. The method according to claim 11, wherein the message is a message coordination service.

13. The method according to claim 11, characterized in that the evaluation runway indicate with the help of the operator of the base station and used for determining a synchronization message OPP during communication sessions PCR between one or more subscriber stations and said base station.

14. The method according to claim 11, wherein the message is a message service.

15. The method according to claim 11, wherein the message is a request message to the service.

16. The method according to claim 11, wherein the message is a response message to the service.

17. The method according to claim 11, wherein the message is a message to the main direction of the transfer service.

18. The method according to claim 11, wherein the message is a universal message transmission route service.

19. The method according to 14, characterized in that the connection message service additionally indicates the schema of the RPF and facilities is but use the scheme OPP.

20. The method according to item 12, characterized in that it further agree with the use of message coordination service scheme OPP used during a subsequent communication session PCR.

21. The method according to claim 20, characterized in that it further agree with the use of message coordination service encryption settings used during a subsequent communication session PCR.

22. Way stream of information bytes, namely, that carry out the request a communication session Protocol radio link (PCR)form the first estimate of the time for transmission and acknowledgement (off) by PCR during the negotiation of the service without using handshakes, determine the synchronization message to the lack of acknowledgment (OPP) in a subsequent communication session PCR on the basis of the first assessment runway PCR and conduct subsequent communication session PCR.

23. The method according to item 22, characterized in that it further measure the delay between frame transmission OPP and first reception of the corresponding frame retransmission for the formation of the second assessment runway PCR and update the first assessment runway PCR based on the second assessment runway PCR.

24. The method according to item 23, wherein when the update additionally perform the calculation of the weighted average value of the first evaluation of WFP PCR and the second assessment runway PCR.

25. SPO is about according to item 23, characterized in that when upgrading additionally replace the first evaluation of WFP PCR on the second assessment runway PCR-based reception of the first frame re-transmission of the communication session PCR.

26. Way stream of information bytes, namely, that carry out the request a communication session Protocol radio link (PCR), perform the tripartite handshaking communication for the first time estimates for transmission and acknowledgement (RTT)associated with the first communication Protocol radio link (PCR)form a second assessment of the runway associated with the second communication session PCR, and the second estimate of the runway based on the first assessment of the runway, and the second assessment runway is calculated by adding a specified time to the first assessment and second assessment runway form during negotiation service, determine the synchronization message to the lack of acknowledgment (RFP) for the second communication session, PCR and spend the second communication session PCR.

27. The method according to p, wherein execution of the tripartite handshakes performed between the base station and subscriber station and the forming of the second assessment WFP performed between the base station and subscriber station.

28. The method according to p, wherein execution of the tripartite handshakes performed between the databases is howling station and the first subscriber station, and the formation of the second assessment WFP performed between the base station and the second subscriber station.

29. The method according to p, characterized in that the second evaluation of MLA form, adding the specified protective time interval to the first assessment of the runway.

30. The device of the subscriber station contains a control processor to implement session request communication Protocol radio link (PCR) and to receive messages matching service that indicates an estimate of the time for transmission and acknowledgement (WFP) for PCR, and the evaluation of the WFP does not endorse during establishment of the communication session, PCR, and for determining a synchronization message to the lack of acknowledgment (OPP) in a subsequent communication session PCR using estimates of the runway and the modulation module mdcr (multiple access, code-division multiplexing) modulation frames matching service and staff PCR supplied to the control processor.

31. The device according to clause 29, wherein the modulation module mdcr further comprises pseudocumene expansion unit for multiplying the information signal containing frames matching service and staff PCR, psevdochumoy code.

32. The base station device containing a control processor to implement session request communication Protocol radio link (PCR) and to send the message according to the voting service, specifies the time for transmission and acknowledgement (off) by PCR in the subscriber station, and the evaluation of the WFP does not endorse during establishment of the communication session, PCR, and for determining a synchronization message to the lack of acknowledgment (OPP) in a subsequent communication session PCR between the base station and subscriber station using estimates of the runway and the modulation module mdcr (multiple access, code-division multiplexing) modulation frames matching service and staff PCR supplied to the control processor.

33. The device according to p, wherein the modulation module mdcr further comprises pseudocumene expansion unit for multiplying the information signal containing frames matching service and staff PCR, psevdochumoy code.

34. Device for transmission of a stream of information bytes that contains the means to implement session request communication Protocol radio link (PCR), means for receiving the message indicating the estimated time to transfer and acknowledgement (WFP) for PCR, and the evaluation of the WFP does not endorse during establishment of the communication session PCR, a means for determining a synchronization message to the lack of acknowledgment (OPP) using estimates of the runway, and means for conducting a communication session PCR.



 

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