Technologies for decrease in cross noises in wireless communication networks

FIELD: physics, communication.

SUBSTANCE: invention gives technologies for reaction to overlapping requirements in networks of a wireless communication which includes a transmit-receive of data from a sending device through a wireless communication network, these data transmission correspond to linking with a sending device and occur within the reserved part of a resource of communication, the requirement of cross noises which includes allocation of a resource of communication for the next device which is overlapped with the reserved part, on the basis of this detection is found out, in an expedient the notice on a sending device goes, the notice specifies presence of overlapped transmissions in the reserved part of a resource of communication.

EFFECT: decrease in cross noises of transmissions in wireless communication networks.

43 cl, 8 dwg

 

This international application claims the priority application for the grant of a U.S. patent, serial number 10/961,092, registered October 12, 2004, entitled "Techniques for reducing interference in wireless networks". This application is included in the materials of the present application by reference in its entirety.

The technical FIELD TO WHICH the INVENTION RELATES.

The present invention relates to wireless communication. More precisely, the present invention relates to technology for reducing the mutual interference of transmissions in wireless networks.

The prior art INVENTIONS

Wireless networks neighboring steps typically include devices that have communication range within one hundred meters or less. To communicate over long distances, these networks often mate with other networks. For example, the network range can be interfaced with cellular networks, telecommunication networks with wired communication lines and the Internet.

Currently, for IEEE 802.15.3a, select standard high-speed physical layer (PHY). The existing level of access control for transmission medium (MAC) IEEE 802.15.3 is supposed to be used as much as possible with the selected PHY. Currently, there are two remaining candidate for the PHY. One of these candidates foundations of the N. on the use of frequency hopping multiplexing orthogonal frequency division multiplexing (OFDM). Another candidate based on M-ary binary manipulation of the shift. The proposal called OFDM multiband OFDM (MBO). Moreover, in order to further develop the proposal OFDM outside the IEEE (Institute of electrical and electronics engineers), there was formed a new Association called the Association of multiband OFDM (MBOA).

MBO uses OFDM modulation and frequency hopping. Hopping the frequency of MBO may include the transmission of each of the OFDM symbols at different frequencies according to predetermined codes such as premaculture codes (TFC). Premaculture codes can be used to encode a broader spectrum of perenesennyj information bits at a greater frequency band.

Today, within MBOA there is interest to create level access control for transmission medium (MAC), which could be used with the physical layer OFDM instead of a MAC-level IEEE802.15.3. The current MBOA MAC version includes a group of wireless communications devices (referred to as the group of emission of the beacon), which is capable of communication with each other. Synchronizing groups of emission of the beacon based on the pattern of repeating "supercarb", in which devices can be allocated communication resources.

Levels of MAC control the communications between the devices of the transmission frames. The MAC frame outstanging different parts. Examples of such parts include the frame headers and body frames. The body frame includes a payload containing the data, associative associated with higher levels of the Protocol, such as custom applications. Examples of such custom applications include web browsers, email applications, messaging applications, and the like.

In addition, the levels of MAC control the allocation of resources. For example, each device requires a dedicated portion of the available bandwidth of operating frequencies of the communication channel to transmit frames. The current proposal MBOA MAC provides for the allocation of resources through transmission of the data indicated as beacons. Beacons are transmitting device uses to transmit not related to the payload information. Each device in the group of emission of the beacon is allocated portion of the bandwidth for transmission of beacons.

Such programs provide an opportunity MBOA MAC to work according to the distributed control approach, in which multiple devices share the responsibility of the MAC layer. The channel access mechanism, referred to as the Protocol of the distributed reservation (DRP)is an example of this shared responsibility. The DRP includes the basic tools for connection and disconnection of the od is napravlennogo connection between two or more devices.

In a distributed network, the device, making a reservation for a connection with another device, may be unaware of the reservations devices around another device. Therefore, MBOA MAC provides information element availability (AIE), which specifies the use of communication resources from the perspective of the other device.

The current specification MBOA MAC (version 0.62, September 2004) requires AIE, which should be sent only in limited circumstances, result in the establishment of the new connection. Otherwise send AIE not necessarily. However, the mobility of the device may cause the previously acceptable allocation of resources to become the kind which cause significant interference.

Supply appeared to device passed AIE each supercade. Although this approach could reduce mutual interference, it also would cause some problems. Such problems include the bandwidth allocated to makovich transmission. This overload could impede send other important makovich transmission. Accordingly, the required technology to reduce mutual interference, which are not wasting communication resources.

The INVENTION

The present invention provides technologies to respond to overload conditions in wireless networks is telecommunication. For example, the methods of the present invention shall receive transmission data from a transmitting device on the wireless network. These data correspond to the connection with the transmitting device and occur within a reserved portion of the communication resource. The method also detects a condition of mutual interference, which includes the allocation of the communication resource for the neighboring device, overlapping with the reserved part. Based on this discovery, a notification is sent to the transmitting device, the notification indicating the presence of overlapping transmissions in the reserved portion of the communication resource.

In addition, the present device provides a computer program product containing program code for providing to the processor capabilities, for example, to perform the features of the process.

The device according to the present invention includes a receiver, controller, and transmitter. The receiver receives data from the sending device over the wireless network. These data correspond to the connection with the transmitting device and occur within a reserved portion of the communication resource. The controller detects a condition of mutual interference, which includes the allocation of the communication resource for the neighboring device, which overlaps the I reserved part. The transmitter sends a notification to the transmitting device, which indicates the presence of overlapping transmissions in the reserved portion of the communication resource.

In addition, the present invention provides a device containing transmitter, receiver, memory, and processor. The receiver receives data from the sending device over the wireless network, which correspond to the connection with the transmitting device and occur within a reserved portion of the communication resource. The memory stores instructions for the processor to detect a condition of mutual interference, which includes the allocation of the communication resource for the neighboring device, which overlaps with the reserved part. The transmitter sends a notification to the transmitting device, the notification indicating the presence of overlapping transmissions in the reserved portion of the communication resource.

Additionally, mutual interference may include the allocation of the communication resource for the neighboring device with a higher priority than the connection with the transmitting device. In addition, the mutual interference can additionally include the allocation of the communication resource for the neighboring device that contains the installation confirmation.

Notification is sent to the sending device may be in the form of information the ion of element availability (AIE) and/or modified information element Protocol distributed reservation (DRP IE).

Additional characteristics and advantages of the present invention will become apparent from the following description and the accompanying drawings.

BRIEF DESCRIPTION of DRAWINGS

In the drawings, the same reference numbers generally indicate identical, functionally similar, and/or structurally similar elements. Drawing on which the element appears for the first time, specified with the left-most digit(s) in the reference number. The present invention will be described with reference to the accompanying drawings, on which:

1 is a diagram of an exemplary operating environment;

2 is a diagram showing an exemplary format of superquadra MBOA;

figa and 3B is a diagram of exemplary communication scenario;

figa and 4B is a diagram showing an exemplary allocation of resources for connections wireless communication network;

5 is a block diagram of the operational sequence of the method of operation of the device according to the variant of implementation of the present invention;

6 is a block diagram of the operational sequence of the method of operation of the device according to an additional variant of implementation of the present invention;

7 is a structural diagram of an exemplary architecture of a wireless device according to a variant implementation of the present invention; and

Fig - structural diagram of an exemplary implementation of the wireless communication devices according to a variant implementation of this is bretania.

A DETAILED DESCRIPTION of the PREFERRED embodiments

I. Operating environment

Before a detailed description of the invention, first and foremost, it is useful to describe the environment in which the present invention can be applied. Accordingly, figure 1 is a diagram of an exemplary operating environment. This environment includes many groups 101 emission of the beacon, each of which contains multiple devices 102. For example, figure 1 shows the group 101A of emission of the beacon, which includes a device (DEV) 102A-E. Figure 1 also shows the group 101b of emission of the beacon, which includes a device (DEV) 102A, 102g and 102h.

In the group 101A emission beacon every DEV 102a-d may communicate with the DEV 102e through the appropriate line 120 connected. For example, figure 1 shows DEV 102a, support communication with DEV 102e through the line 120A communication. In addition, the group 101A emission lighthouse each device 102A-e may communicate with each other directly. For example, figure 1 shows DEV 102 and 102d that communicates via a straight line a connection.

In the group 101b emission beacon every DEV 102f and 102g may communicate with the DEV 102h through the appropriate line 120 connected. For example, DEV 102f liaise with DEV 102h through the line 120f communication, while DEV 102g liaise with DEV 102h through the line 120g communication. DEV 102f and 102g in the group 101b emission lighthouse is also able to communicate with each other. For example, figure 1 shows DEV 102f and 102g that communicates via line 122b connection.

Each of the lines 122 and 120 may use various schemes of frequency hopping. These schemes may include, for example, one or more breechcloth codes (TFC). In embodiments implementing the present invention, each group 101 emission beacon uses a specific scheme of frequency hopping. These schemes may be the same or different.

Each of the transmission groups 101a and 101b of emission of the beacon based on a repeatable pattern, called superquadra. Accordingly, figure 2 diagram showing an exemplary format of superquadra MBOA. In particular, figure 2 shows the frame format containing supercarry 202a, 202b and s. As shown in figure 2, supercar 202b immediately following superquadra 202a, and supercat 202c immediately following superquadra 202b.

Each supercar 202 includes makovy period 204 and the period 206 data. Macovei periods 204 deliver transmission from each of the devices in the group of emission of the beacon. Accordingly, each makovy period 204 includes Macovei intervals 207, each of which corresponds to a specific device in the group of emission of the beacon. During these intervals, the corresponding device may send different service or network information is the situation.

For example, such information may be used to define distributions of resource for transmitting control information for a group of emission of the beacon. In addition, according to the present invention, the periods 206 data can be used to transmit information about services/services and functionality (for example, information services, applications, games, topologies, tariffs, protective features and other devices within the group of emission of the beacon. The transfer of such information to makovich periods 204 may occur in response to requests from devices, such as scanning devices.

Period 206 data is used for devices to transmit data, for example, according to the technology frequency hopping, which use OFDM and/or TFC. For example, periods 206 data can support data transmission lines 120 and 122 connected. In addition, the device (for example, DEV 102a-e) may use periods 206 data to transmit control information, such as request messages to other devices. In order to facilitate the flow of currency, each DEV can be assigned a specific time interval within each period 206 data. In the context of the specification MBOA MAC, these time intervals are referred to as intervals access is to the transmission medium (MAS).

MAS is a time period inside the period 206 data in which two or more devices are protected from competitive access devices confirming the reservation. MAS can be distributed according to the distribution Protocol, such as Protocol distributed reservation (DRP).

II. Scenarios mutual interference

Figa and 3B is a diagram of exemplary communication scenario in which multiple devices 302 participate in the network 300 short-range wireless communications, such as a group 101 of emission of the beacon. Under this scenario figa shows the initial position of the communication devices. The subsequent location of these devices is shown in figv.

With reference to figa shows the initial set of conditions. These initial conditions include the device 302a connected 350a device 302b, and the device 302d connected 350B water with the device 302e. Traffic (flow) can be transmitted through the connection 350 a variety of ways. For example, an exemplary connection 350 includes a transmitting device (also indicated as the sender) and the receiver (also indicated as the recipient).

The transmitting device sends data to the receiving device. In response, the receiving device may send information such as a confirmation message to indicate acceptance transferred to the s data. Data messages and Acknowledgements are transmitted through the selected portion of the available bandwidth communication, such as the part(s) period of data superquadra. As an illustrative example, the device 302a is the sender, and the device 302b is a recipient for the connection 350a. To connect 350B water device 302e is the sender, and the device 302d is the recipient.

Each device 302 sends macavoy transfer during makabago period, such as makovy period superquadra defined MBOA MAC. In addition, for each connection 350 participating device 302 transmit data. These data may occur, for example, during transfer of the data superquadra defined MBOA MAC.

To illustrate figa and 3B include the circle 304, each of which represents a spatial region or location. Devices that are inside each circle 304 that can receive transmissions of each other. For example, figa shows that the device a and 302b can receive each other as they are within the circle a. In this way the device 302b is can receive transmissions of each other, as both devices are within the circle 304b. Moreover, the device 302c, 302d and 302e can receive transmissions of others is g other because they are inside the circle 304c.

Due to the mobility of the devices 302 communication conditions may vary, for example figv shows that the device 302d moved within the circle 304b. Hence, the device 302d is now able to receive transmissions from devices 302b, 302c and 302e. If the regulations of the data (e.g., DRP reservation) compounds 350a and 350B water overlap in time, the relationship one or both of these compounds will be exposed to strong mutual interference.

Figa and 4B show the approximate distribution of the transmission time (for example, DRP-regulation) communications network 300. These distributions are shown along the axis 400 time from the perspectives of different devices. In particular, figa shows a view of the device with the initial conditions figa, while figv shows a view of the device for subsequent terms figv.

With reference to figa, view 402 distribution for the connection 350a shown from the point of view of the devices 302a and 302b. In addition, figa shows a perspective 404 allocation to connect 350B water from the point of view of the device 302d and 302e. These angles can be seen that the distribution of transmission data for compounds 350a and 350B water overlap in time. However, with angles devices 302a, 302b, 302d and 302e, these distributions do not interfere with each other at the time of initial conditions on figa. This is because for these Nacha is lnyh conditions device 302a and 302b may not accept transfers from device 302d and 302e, and Vice-versa.

However, for subsequent conditions of figv, there are mutual interference.

In particular, figv shows a perspective 406 distribution from the point of view of the device 302a, view 408 and 410 distribution from the point of view of the device 302b and 302d, and the angle 412 distribution from the point of view of the device 302e.

As shown by the angles 406 and 412 distributions of transfer (e.g., data) from the device 302b on the device 302a and the device 302e on the device 302d do not intersect. However, the angles 408 and 410 distributions show that the transmission device 302a to the device 302b and device 302e on the device 302d intersect each other. However, due to conditions of transmission network 300 devices 302a and 302e can't identify the source of the interference (which manifest as a capacity reduction).

In these situations, the devices that are inclined to accept such interference may notice the overlap of the distribution circuits and identify the sources of interference, receiving and processing Macovei transfer from its neighboring devices. Accordingly, a variant of implementation of the present invention provides that the device report such sources of interference devices, with whom they share a connection.

III. Work

5 is a block diagram of a sequence of operas is under way according to aspects of the present invention. This work involves interaction between the first device (sender) and second device (receiver). In this work, the recipient informs the sender if there are one or more interfering conditions. On the basis of such notification nuisance conditions can be removed. Work on figure 5 are described in the context of the MBOA network, such as group 101 emission beacon of figure 1. However, this work can also be used in other contexts.

As shown in figure 5, this work includes the step 502, where the sender and receiver participate in the wireless communication network, such as a group 101 of emission of the beacon. Accordingly, each of these devices are being related to the payload communication resources, such as makovy interval.

At step 503 is formed the connection between the sender and the recipient. This connection includes the allocation of communication resources (e.g., one or more parts of the transmission period data superquadra). In MBOA network such distribution can be performed according to the Protocol of the distributed reservation (DRP).

DRP provides devices with the ability to make a reservation for a certain period of data superquadra. Creating a backup is referred to as DRP negotiation. In order to establish and maintain a backup (or link) is a device, requesting the reservation (e.g., the sender), transmits the DRP information element (DRP IE) during his makabago interval. Another device(a) on the connection (for example, the receiver also transmits the DRP IE in its Makova interval. Both of these devices transmit DRP IE in their respective makovich intervals each superquadra during the lifetime of the reservation.

At step 504, the sender transmits the data to the recipient via the selected communication resources (e.g., existing DRP reservation). In the variants of implementation, this step includes receiving one or more data transmissions within the resources allocated to the connection between the two devices. On receiving this signal, the receiver can transmit the relevant confirmation message to the sender at step 506. These data and confirmation can be in the form of OFDM.

At step 507, the receiver tracks not related to the payload transmission (for example, Macovei transfer) any of the neighboring devices (i.e. devices, from which the recipient can accept the transfer). This tracking includes receiving information connections neighboring device(s). Such connection information describes the resources allocated to these devices for communication. In embodiments, the implementation of this information about the connection comes in the form of DRP IE. As the EAC is zdeno above, IE DRP determines which specific intervals are used emits a beacon device.

Based on this tracking, the receiver determines whether there are one or more conditions of redistribution. Examples of such conditions are described below with reference to steps 508, 512.

Figure 5 shows that at step 508, the receiver determines whether the distribution (for example, DRP reservation) neighboring devices overlap with the distributions (e.g., DRP-redundant) resources belonging to the compounds of the recipient. If so, the action moves to step 510. However, as an alternative, figure 5 provides that the action may proceed to step 512 or step 516, depending on implementation. Otherwise, figure 5 shows that if such overlapping is no, the step goes to step 518.

At step 510, the receiver determines whether the overlapping distribution of the neighboring device priority, which is higher than that of the recipient. If so, the action moves to step 512. However, alternatively, figure 5 shows that the action may proceed to step 516, depending on implementation. Otherwise, if the overlapping distribution does not have a higher priority, the action moves to step 518. Also be the marked under certain environmental conditions, such as in the case of asymmetric communication line, the action (implementation options) go to step 516, even when the priority of the neighboring device below such compounds of the recipient.

At step 512, the receiver determines are in overlapping distribution (or redundancy) of a neighboring device confirmation. For example, with reference to the MBOA, step 512 may contain the definition applies whether overlapping redundancy strategy confirm the imm-ack or b-ack. As will be described below, these definitions can be obtained thanks to the information that is contained in the strategy ACK from DRP IE. If such confirmation is used, the action moves to step 516. Otherwise, at step 518.

Figure 5 shows that the step 516 is performed, when they were satisfied with the condition(I) redistribution in step 508, and (in the variants of implementation) stages 510 and/or 512. At step 516, the recipient and the sender contacted in order to reallocate resources communication recipient. However, figure 5 shows that the step 518 is performed when such conditions are not satisfied. At this stage, the device refuses to perform actions redistribution.

The step 516 can be made in various ways. One way involves the exchange of information through makovich transmission. For example, step 516 may include the formation and transmission of the updated recipient information item availability (AIE) during his makabago interval. Alternatively, step 516 may include the formation and transfer of the recipient updated and modified DRP IE. As a further alternative, step 516 may include the formation and transfer of a recipient of both, updated AIE, as well as updated and modified DRP IE. In addition, the receiving device can receive DRP IE from the transmitting device.

IV. Information items availability and DRP

According to the current specification MBOA MAC, AIE is used by the device to indicate its view of the current use of MAS in supercade device. Format AIE shown below in table 1.

Table 1< / br>
Format AIE
Octets: 3211
Bitmap availabilityLength

(=x)
ID

As shown in table 1, AIE contains a bitmap availability, which is 256 bits. Each of these bits corresponds to each MAS in supercade. More precisely, each bit in the bitmap indicates the availability of devices for sootvetstvujushej the MAS. For example, '0' indicate that the device is available during the relevant MAS, and '1' indicate that the device is not available during the relevant MAS.

Thus, at step 516, the sender can take AIE, which indicates the presence of overlapping distributions. Currently, MBOA MAC sets of limited use for AIE. During the DRP negotiation unicast transmission, the device needs to respond to the requesting device using AIE, if the request could not be fully acceptable. This requirement may occur when the device is not able to recognize the request due to a conflict with other reservations. Otherwise transfer AIE optional. The transmitting device may use AIE recipient to make a new reservation or changes for intervals MAS that are free for the recipient. Accordingly, step 516 may further comprise sending the receiving device of the modified DRP IE in the following supercade.

The following describes the format of the DRP proposals MBOA MAC. Table 2 below illustrates the format of the DRP IE.

Table 2< / br>
The format of the information element Protocol distributed reservation
About the Teta: 2 22311
DRP

Reserving 1
...DRP reservation

N
DEVID recipient/

source
DRP-managementLength

(=x)
ID

Table 2 shows that the DRP IE includes one or more fields DRP reservation, each is 2 octets in length. The format of this field is shown below in table 3.

Table 3< / br>
Field format DRP reservation
Octets: 11
Duration DRPOffset DRP

Offset field of the DRP in table 3 indicates the starting time of the scheduled transmission. It must be installed in the room of the interval of the first interval redundancy, which is defined relative to the initial moment makabago period (BPST). Duration field DRP table 3 contains, in numerous data intervals, the duration of the backup.

Table 2 also shows that the DRP IE includes tragacete DRP control field. The format of this field is illustrated below in table 4.

Table 4< / br>
Format field DRP control
Bits: 855411
ReservedThread IDPriorityTypeStrategy ACKTx/Rx

In the field DRP control bit Tx/Rx set to '0'if the device is sending a scheduled transmission, and it is set to '1'if the device is a receiver. This bit is decoded only if the reservation type is rigid (Hard) or soft (Soft). Bit strategy ACK (acknowledgement) field DRP control is set to '0' for reservations unicast with a strategy of No-ACK (without confirmation), and for reservations for multicast or broadcast transmission. However, this bit is set to '1' for reservations unicast strategies Imm-ACK or B-ACK. Bit strategy ACK is decoded only if the reservation type is hard or soft. The sending priority field is set DRP control and may have a value between '0' and '7'.

Field field type DRP-control specifies the type of reservation and is encoded as shown below in table 5.

Table 5< / br>
Types DRP reservations
0000 Makovy period
0001Hard reservation
0010Soft reservation
0011Private reservation
0100Spare (reserved)
0101Spare
0110-1111Spare

Field IRRESPECTIVE of the destination/source of the DRP IE is installed in the device ID of the recipient group multicast or broadcast address when the device is sending DRP IE is the sender, and the device ID of the sender, when the device is sending DRP IE is the recipient. Field DEVID is decoded only if the reservation type is hard or soft.

According to aspects of the present invention, when the receiver notices the reservation in their environment (i.e., from a neighboring device, which is overlapped with its own reservation, the receiver informs its sender about the conflict (collision). This notification may be included in the step 516. In the embodiment, the receiving device indicates the intervals MAS collision, passing an indication of these intervals in the DRP IE that it confers. This provides an indication to the transmitter that such specific intervals in the s should not be used for data transmission to the recipient. In an additional embodiment, the receiving device indicates the intervals MAS collision as unavailable in the bit vector, which it passes to the AIE. However, in additional embodiments, the implementation of the present invention, the recipient specifies the interval of collision as by passing the intervals clashes in the DRP IE and by sending AIE, which specifies the interval of collision as unavailable. This helps the transmitter to identify any loose intervals MAS.

V. Initiated by the recipient agreement

An additional alternative for step 516 includes initiated by the recipient of the message exchange between the recipient and the sender. Respectively, 6 is a diagram showing the interaction between the sending device 602 and the receiving device 604, which entails the exchange of such messages. These messages can be transmitted through makovich transmission. Alternatively, these messages may be transmitted via dedicated bandwidth connection (i.e., existing reservation). The advantage of this interaction is that it can save time (for example, one supercat) more of the above AIE approach, which includes a mechanism DRP reservation.

Simocatta on 6 includes numerous stages. For example, at step 610, the receiving device 604 sends a message ChangeRecommendation (recommendation changes) the transmitting device 604. As shown in Fig.6, the message ChangeRecommendation includes setting guidelines for the reservation and AIE. Parameter recommendations reservation specifies the intervals MAS recommends the recipient, and AIE shows all the options.

The transmitting device 602 receives and processes the message. Based on this, the transmitting device 602 generates and sends a message ChangeRequest (change request) in step 612. As shown in Fig.6, this message includes the requested reservation (distribution), as well as current.

To receive messages ChangeRequest the receiving device determines whether the request is acceptable. If found acceptable, the receiving device 604 sends a message ChangeResponse the transmitting device 602 at step 614.

VI. The realization of a device

Fig.7. diagram of the device 700 wireless communication, which can operate according to the technology of the present invention. This device can be used in a variety of external conditions of communication, such as the conditions of figure 1. As shown in Fig.7, the device 700 includes a controller 702 physical layer (PHY), the controller 703 controls access to the transmission medium (MAC)transceiver 704 OFDM, in which rhni level(no) 705 Protocol and the antenna 710.

The controller 703 MAC generates frames (data) and beacons for wireless transmission. In addition, the controller 703 MAC receives and processes the frames and Macovei transmission, which come from remote devices. The controller 703 MAC exchanged these frames and masowymi the transmission controller 702 PHY. In turn, the controller 702 PHY personnel exchanges and masowymi transmissions from transceiver 704 OFDM. In addition, the controller 703 MAC identifies nuisance conditions and initiates the elimination of such conditions. For example, in variants of implementation, the controller 703 MAC can perform the steps in figure 5.

Fig.7 shows that the transceiver 704 OFDM includes part 750 receiver and part 760 of the transmitter. Part 760 of the transmitter includes a module 714 inverse fast Fourier transform (inverse FFT, IFFT)module 716 additions zero, the inverter 718 with increasing frequency and amplifier 720 transfer. Module 714 inverse FFT accepts frames for transmission from the controller 702 PHY. For each of these frames module 714 inverse FFT generates the OFDM-modulated signals. This formation involves performing one or more operations of the inverse fast Fourier transform. As a result of this OFDM-modulated signal includes one or more OFDM symbols. The signal is sent to the module 716 zero-fill that PR is craplet one or more "zero samples" to the beginning of each OFDM symbol, to create augmented modulated signal. Converter 718 with increasing frequency takes this augmented signal and applies based on carrier technology for placing it in one or more frequency bands. These one or more frequency bands are determined according to the scheme, frequency hopping, such as one or more of the TFC. As a result, the inverter 718 with increasing frequency generates a signal of frequency hopping, which is amplified by the amplifier 720 transmission and transmitted through the antenna 710.

Fig.7 shows that part 750 receiver includes a Converter 722 with decreasing frequency, the amplifier 724 and reception module 726 fast Fourier transform (FFT). These components (also indicated as a receiver) are used to receive wireless signals from remote devices. In particular, the antenna 710 receives wireless signals from remote devices that can apply a schema frequency hopping, such as one or more of the TFC. These signals are sent to the amplifier 724, which generates amplified signals. The amplifier 724 sends the amplified signals to the inverter 722 with decreasing frequency. The Converter 722 with decreasing frequency applies based on bearing technology to convert these signals from one or more bands with accompany frequency (for example, bands TFC) in a predefined frequency range. This is the result of modulated signals, which are received by the module 726 FFT, which performs OFDM-demodulation on these signals. This demodulation involves performing a fast Fourier transform for each character that is transmitted in amplified signals.

As a result of this demodulation module 726 FFT forms one or more frames that are sent to the controller 702 PHY. These frames can transmit information such as the data payload and the header(and) Protocol. The controller 702 PHY handles these frames. This may include removing fields in the PHY layer header and forwarding the remaining parts of the frames in the controller 703 MAC.

As shown in Fig.7, the device 700 additionally includes one or more upper layers 705 Protocol. These levels may include, for example, the user's application. Accordingly, the upper levels of 705 may communicate with remote devices. This entails the level(s) 705 sharing Protocol units of exchange with the controller 703 MAC. In turn, the controller 703 MAC controls the controller 702 PHY and transceiver 704 to send and receive the corresponding wireless signals.

The device 7 may be implemented in hardware, software, software-hardware or any combination. For example, the inverter 718 with increasing frequency, the amplifier 720 transmission amplifier 724 and receive Converter 722 with decreasing frequency may include electronics, such as amplifiers, mixers and filters. Moreover, the implementation of the device 700 may include a digital signal processor(s) (DSP, DSP) to implement various modules, such as module 706 scanning module 714 inverse FFT module 716 zero-fill and module 726 FFT. Moreover, in embodiments of the invention, the processor(s), such as a microprocessor that executes instructions (i.e. software)that are stored in memory (not shown)can be used to control the operation of the various components in the device 700. For example, components such as the controller 702 PHY and controller 703 MAC, mainly, can be implemented by software running on one or more processors.

One such implementation of the architecture shown in Fig.7 Fig. This diagram illustrates the target device implemented according to one of embodiments of the present invention. As shown in Fig, this implementation includes a processor 810, a memory 812 and user interface 814. In addition, the implementation pig includes a transceiver 704 OFDM and antenna 710. These components can be implemented as described above with reference to Fig.7. However, the implementation pig can be modified to include different transceivers that support other wireless technologies.

The processor 810 controls the operation of the device. As shown in Fig, the processor 810 is connected to the transceiver 704. The processor 810 may be implemented by one or more microprocessors, each of which is capable of executing software instructions stored in memory 812, for example, in the form of a computer system.

Memory 812 includes a random access memory (RAM, RAM), a persistent storage device (RAM, ROM) and/or flash memory, and stores information in the form of data and software components (also referred to in the materials of this application as modules). These software components include instructions that can be executed by the processor 810. Different types of software components may be stored in memory 812. For example, the memory 812 may store software components that control the operation of transceiver 704. In addition, the memory 812 may store software components that provide the functionality of a controller 702 PHY, controller 703 MAC and upper level(s) 705 Protocol.

In addition, the memory 812 may store software to mponent, that control the exchange of information through the user interface 814. As shown in Fig, the user interface 814 is also connected to the processor 810. The user interface 814 facilitates information exchange with the user. Fig shows that the user interface 814 includes part 816 user input and part 818 user output.

Part 816 user input may include one or more devices that provide the user the ability to enter information. Examples of such devices include keypads, touch screens and microphones. Part 818 user output allows the user to receive information from the device. So, part 818 user output may include various devices such as a display and one or more audio speakers (e.g., stereo), and audio processor and/or power for excitation of the speakers. Exemplary displays include color liquid crystal displays (LCD) and color video displays.

The items shown on Fig can be connected according to different technologies. One such technology involves the connection of the transceiver 704, processor 810, memory 812 and the user interface 814 through one or more tire online is hasov. In addition, each of these components attached to the power source, such as a removable and/or rechargeable battery (not shown).

VII. Conclusion

Although the above described embodiments of the present invention, it should be clear that they have been presented only as examples and not limitations. For example, although examples have been described involving communication MBOA, other communication technologies short-range and long range are within the scope of the present invention. Moreover, the technology of the present invention can be used with the technology of transmitting signals other than OFDM.

Accordingly, specialists in the art it will be obvious that various changes in form and content can made it from the comfort of the nature and scope of the invention. Thus, the breadth and scope of the present invention should not be limited by any of the above embodiments, but should be defined only in accordance with the subsequent claims and its equivalents.

1. The method in the wireless communication device to indicate the presence of overlapping reservations in wireless communication network, the method comprises the steps

(a) accept data from the sending device within a wireless communication network, and transmission Yes the data correspond to the connection with the transmitting device and occur within a reserved portion of the transmission period of the data resource communication;

(b) take many makovich transmission from one or more devices belonging to said communication network, and mentioned beacons support coordination between devices in the network, and occur within the allocated makabago period of resource relationships;

(c) find the mutual interference, thus, the mutual interference involves taking macavoy transmission, indicating that resource reservation communication with another device, overlapping with the above-mentioned reserved part of the transmission period of the data resource communication; and

(d) sending a notification to the transmitting device, where the notification indicates the presence of overlapping reservations in a reserved portion of the transmission period of the data resource communication.

2. The method according to claim 1, in which the mutual interference additionally includes the allocation of the communication resource for the neighboring device with a higher priority than the connection with the transmitting device.

3. The method according to claim 2, in which the mutual interference additionally includes the allocation of the communication resource for the neighboring device, with the option of confirmation.

4. The method according to claim 1, in which step (C) contains the notification for part of the link resource allocated is not related to the payload of the transmission.

. The method according to claim 4, in which part of the link resource allocated is not related to the payload of the transmission, is a periodically occurring time interval.

6. The method according to claim 5, in which the periodically occurring time interval is majkovym interval.

7. The method according to claim 4, in which step (C) is that transmit information element availability (AIE) for part of the link resource allocated is not related to the payload of the transmission.

8. The method according to claim 7, in which AIE includes many bits each from the set of bits indicates the status of your booking, the relevant part of the communication resource.

9. The method according to claim 7, in which step (C) further comprises transmitting the modified information element Protocol distributed reservation (DRP IE), modified DRP IE provides guidance overlap the reserved parts of the communication resource to the wireless device.

10. The method according to claim 9, in which the modified DRP IE indicates overlapping reserved part of the resource by skip instructions of corresponding intervals of access to the transmission medium (MAS).

11. The method according to claim 7, additionally comprising

accept information element Protocol distributed reservation (DRP IE) from the sending device, IE DRP reserves the range a new part of the resource connection for receiving data from the sending device.

12. The method according to claim 11, in which the DRP IE is taken during the second part of the link resource allocated is not related to the payload of the transmission, from the sending device.

13. The method according to claim 1, in which step (C) contains the transmission of notifications are not overlapping reserved parts of the communication resource to the wireless device.

14. The method according to item 13, in which the said indication is included in the modified information element Protocol distributed reservation (DRP IE).

15. The method according to 14, in which the modified DRP IE indicates overlapping reserved part of the resource by skip instructions of corresponding intervals of access to the transmission medium (MAS).

16. The method according to claim 1, additionally containing

(e) reserve new part of the resource connection for receiving transmission data from a transmitting device.

17. The method according to clause 16, in which step (e) contains the information element Protocol distributed reservation (DRP IE) from the sending device, DRP IE indicates the new part of the communication resource.

18. The device to send notifications overlapping reservations in wireless communication network, comprising

a receiver configured to receive transmission data from a transmitting device within a wireless communication network, and data transfer with the correspond connection with the transmitting device and occur within a reserved portion of the transmission period of the data resource communication;

and the said receiver additionally has a capability of taking multiple makovich transmission from one or more devices belonging to said communication network, and mentioned beacons support coordination between devices in the network, and occur within the allocated makabago period of resource relationships;

the controller is configured to detect conditions of mutual interference, thus, the mutual interference involves taking macavoy transmission indicating the reservation of the resource connection of other device that overlaps with the reserved part of the transmission period of the data resource communication; and

a transmitter, configured to send a notification to the transmitting device, the notification indicating the presence of overlapping reservations in a reserved portion of the transmission period of the data resource communication.

19. The device according to p, in which the mutual interference additionally includes the allocation of the communication resource for the neighboring device with a higher priority than the connection with the transmitting device.

20. The device according to claim 19, in which the mutual interference additionally includes the allocation of the communication resource for the neighboring device that contains the installation confirmation.

21. The device according to p, to the torus transmitter is additionally configured to send said notification within part of the resource connection, selected not related to the payload of the transmission.

22. The device according to item 21, in which part of the link resource allocated is not related to the payload of the transmission, is a periodically occurring time interval.

23. The device according to item 22, in which the periodically occurring time interval is majkovym interval.

24. The device according to item 21, in which the notification includes information element availability (AIE), passed during part of the link resource allocated is not related to the payload of the transmission.

25. The device according to paragraph 24, in which AIE includes many bits each from the set of bits indicates the status of your booking, the relevant part of the communication resource.

26. The device according to paragraph 24, in which the notification additionally includes a modified information element Protocol distributed reservation (DRP IE), modified DRP IE provides guidance overlap the reserved parts of the communication resource to the wireless device.

27. The device according to p, in which the modified DRP IE indicates overlapping reserved part of the resource by skip instructions of corresponding intervals of access to the transmission medium (MAS).

28. The device according to paragraph 24, in which the receiver additionally konfigurera is for receiving an information element Protocol distributed reservation (DRP IE) from the sending device, IE DRP reserves new part of the resource connection for receiving data from the sending device.

29. The device according to p in which the DRP IE is taken during the second part of the link resource allocated is not related to the payload of the transmission, from the sending device.

30. The device according to p in which a wireless network is a network of IEEE 802.15.3.

31. The device according to p, in which the receiver is additionally configured to receive transmission data from a transmitting device in the form of signal multiplexing orthogonal frequency division multiplexing (OFDM).

32. The device according to p in which the notification includes an indication of non-overlapping reserved parts of the communication resource to the wireless device.

33. The device according to p, in which the indication is included in the modified information element Protocol distributed reservation (DRP IE).

34. The device according to p, in which the modified DRP IE indicates overlapping reserved part of the resource by skip instructions of corresponding intervals of access to the transmission medium (MAS).

35. Computer system to detect the presence of overlapping reservations in wireless communication network, comprising

a receiver configured to receive transmission data from the transmitting device the VA within a wireless communication network, the data correspond to the connection with the transmitting device and occur within a reserved portion of the transmission period of the data resource communication;

and the said receiver additionally has a capability of taking multiple makovich transmission from one or more devices belonging to said communication network, and mentioned beacons support coordination between devices in the network, and occur within the allocated makabago period of resource relationships;

processor;

memory, and the memory stores instructions for the processor to detect a condition of mutual interference, thus, the mutual interference involves taking macavoy transmission indicating the reservation of the resource connection of other device that overlaps with the reserved part of the transmission period of the data resource communication; and

a transmitter, configured to send a notification to the transmitting device, the notification indicating the presence of overlapping reservations in a reserved portion of the transmission period of the data resource communication.

36. Computer system p, in which the mutual interference additionally includes the allocation of the communication resource for the neighboring device with a higher priority than the connection with the transmitting of mouth is Euston.

37. Computer system p, in which the mutual interference additionally includes the allocation of the communication resource for the neighboring device that contains the installation confirmation.

38. Computer system p in which the notification includes an indication of non-overlapping reserved parts of the communication resource to the wireless device.

39. A computer system according to § 38, in which the said indication is included in the modified information element Protocol distributed reservation (DRP IE).

40. Computer system p, in which the transmitter is additionally configured to send a notification for part of the link resource allocated is not related to the payload of the transmission.

41. Computer system p in which the notification includes information element availability (AIE), passed during part of the link resource allocated is not related to the payload of the transmission.

42. A computer system according to paragraph 41, in which the notification additionally includes a modified information element Protocol distributed reservation (DRP IE), modified DRP IE provides guidance overlap the reserved parts of the communication resource to the wireless device.

43. Computer-readable media, the content is a first computer program logic, written on it to indicate the presence of overlapping reservations in wireless communication networks, and computer software logic contains

program code for providing the processor to accept data from the sending device within a wireless communication network, the data correspond to the connection with the transmitting device and occur within a reserved portion of the transmission period of the data resource communication;

program code for forwarding the processor the opportunity to take many makovich transmission from one or more devices belonging to said communication network, and mentioned beacons support coordination between devices in the network, and occur within the allocated makabago period of resource relationships;

program code for providing to the processor the ability to detect mutual interference, under the condition that mutual interference involves taking macavoy transmission, indicating that resource reservation communication with another device, overlapping with the reserved part of the transmission period of the data resource communication; and

program code for providing to the processor the ability to send a notification to the transmitting device, where the notification indicates the presence of perekryvaya the reservations in a reserved portion of the transmission period of the data resource communication.



 

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