KR20090043696A - Apparatus and method for supporting peer to peer communication in broadband wireless communication system - Google Patents

Abstract

The present invention relates to peer to peer (P2P) communication in a broadband wireless communication system, wherein a terminal receives uplink resource allocation information from a serving base station and is not allocated using the uplink resource allocation information. A P2P including a checker for confirming that the P2P communication radio resource allocation information is allocated to the terminal performing P2P communication, and a resource allocator for allocating P2P communication radio resources for P2P communication in the remaining radio resource region. By assigning a coordinator role to the terminal for communication, it is possible to perform P2P communication without loss of radio resources to be used for cellular communication.

Peer to Peer (P2P), Coordinator, Slot Indexing

Description

Apparatus and method for supporting peer-to-peer communication in a broadband wireless communication system {APPARATUS AND METHOD FOR SUPPORTING PEER TO PEER COMMUNICATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a broadband wireless communication system, and more particularly, to an apparatus and method for supporting peer-to-peer communication between terminals in a broadband wireless communication system.

In general, in a cellular communication system, a terminal performs direct communication with the base station using a radio resource managed by the base station. In other words, in order for the two terminals to communicate with each other, each of the two terminals must establish a connection with the base station and be allocated an uplink and downlink radio resource from the base station. The base station transmits data received from one terminal through a corresponding connection to another terminal through a separate connection.

Another way in which two terminals communicate with each other is a peer to peer (P2P) scheme. The P2P forms a direct connection between the two terminals to perform communication, and the two terminals directly transmit and receive signals between the two terminals. An example of a wireless communication system supporting the P2P is a wireless world initiated NEw (WINNER) system of the Wireless World Initiative (WWI).

The frame structure of the WINNER system is as shown in FIG. The frame of the WINNER system consists of a super frame, and one super frame includes a control signal region 110, a plurality of downlink regions 120, a plurality of uplink regions 130, and a P2P region 140. Include. Here, the P2P region 140 is a resource region allocated for P2P communication between terminals. Therefore, the P2P region 140 is not used for communication between the base station and the terminal. As a result, the terminals can perform interference-free P2P communication of the base station.

However, by separately allocating the resource region for the P2P communication, the amount of traffic resources to be used by the base station is reduced. This means poor performance of cellular systems. Accordingly, the cellular wireless communication system operator avoids P2P communication using a separate resource area. Even if an operator supports P2P communication using a separate resource area, cellular communication charges may increase as much as the damages caused by P2P communication. Therefore, there is a need for an alternative to perform P2P communication while minimizing radio resource damage to be used for cellular communication.

Accordingly, an object of the present invention is to provide an apparatus and method for performing peer to peer (P2P) communication without radio resource loss to be used for cellular communication in a broadband wireless communication system.

Another object of the present invention is to provide an apparatus and method for allowing a plurality of terminals to perform P2P communication under the control of a terminal representing a group in a broadband wireless communication system.

Another object of the present invention is to provide an apparatus and method for minimizing mutual interference with cellular communication in P2P communication in a broadband wireless communication system.

According to a first aspect of the present invention for achieving the above object, in a broadband wireless communication system, a terminal device receives uplink resource allocation information from a serving base station, and remaining radios not allocated using the uplink resource allocation information. A checker for identifying a resource area, a resource allocator for allocating a P2P communication radio resource for peer-to-peer communication to the remaining radio resource area, and transmitting the P2P communication radio resource allocation information to a terminal performing P2P communication Characterized in that it comprises a communication unit.

According to a second aspect of the present invention for achieving the above object, a P2P communication method of a terminal in a broadband wireless communication system, receiving uplink resource allocation information from a serving base station, and is not allocated using the uplink resource allocation information Identifying a remaining radio resource region that has not been received, assigning a P2P communication radio resource for P2P communication to the remaining radio resource region, and transmitting the P2P communication radio resource allocation information to a terminal performing P2P communication; It is characterized by including.

In a broadband wireless communication system, by giving a terminal a coordinator role for peer-to-peer communication, P2P communication can be performed without loss of radio resources to be used for cellular communication.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, the present invention describes a technique for minimizing radio resource loss to be used for cellular communication in a broadband wireless communication system and performing peer-to-peer communication. The present invention is described by taking an orthogonal frequency division multiplexing (hereinafter referred to as "OFDM") wireless communication system as an example, and may be equally applicable to other wireless communication systems.

2 illustrates a schematic relationship of terminals performing P2P communication in a broadband wireless communication system according to the present invention.

As shown in FIG. 2, in the broadband wireless communication system according to the present invention, a plurality of terminals form one group 210 to perform P2P communication. One terminal among the plurality of terminals included in the group 210 operates as a 'P2P coordinator terminal' 211, and the plurality of terminals other than the P2P coordinator terminal are 'P2P member terminals' 213-1. To 213-3). For convenience of description, the 'P2P coordinator terminal' is referred to as a 'P2P Coordinator' and the 'P2P member terminal' is referred to as a 'P2P member'.

The P2PC 211 performs the following role. First, the P2PC 211 checks the P2P participation request message received from another terminal and determines whether to accept it as P2PMs 213-1 to 213-3 of its own P2P group 210. That is, the terminal may perform P2P communication as the P2PM 213 only with the consent from the P2PC 211. Second, the P2PC 211 allocates resources for P2P communication to the P2PMs 213-1 to 213-3. Third, the P2PC 211 generates a P2P map (MAP) message for P2P communication, and transmits the P2P map message to the P2PMs 213-1 to 213-3.

All terminals are qualified to be the P2PC, and when it is determined that there is no P2PC around when P2P communication is performed, it operates as a P2PC itself. In other words, the terminal for P2P communication attempts to detect the P2P map message. If the P2P map message is not received as a result of the attempt, the terminal which intends to perform the P2P communication determines that there is no P2PC nearby and operates as a P2PC itself. On the other hand, when the P2P map message is received as a result of the attempt, the UE to perform the P2P communication transmits a P2P participation request message and operates as a P2PM. However, depending on the location or capability of the terminal, the P2PM may operate as a new P2PC through a negotiation procedure with the P2PC.

P2PC and P2PM are used for cellular communication and the remaining radio resources are used for P2P communication. As shown in FIG. 3A, a radio resource for P2P communication has a super frame structure, and one super frame is configured by collecting residual radio resources generated from a plurality of cellular frames. The P2P super frame includes a P2P map area 310, a slot area 320, and a contention access area 330. The P2P map region 310 occupies a promised position and a promised size within a super frame, and the slot region 320 and the contention access region 330 occupy a position and size indicated by a P2P map message. . That is, the location and size of the slot area 320 and the contention access area 330 vary depending on the allocation result of the P2PC.

At this time, as shown in Figure 3b, radio resources for P2P communication is divided into a predetermined size is indexed (indexed) to be used. By confirming the map message received from the base station, the terminal can know the distribution of the remaining radio resources that are not used for cellular communication. After confirming the distribution of the residual radio resources, the terminal divides the residual radio resources into units of a predetermined size and indexes the slots classified according to the promised scheme. As a result, all terminals acquire the same slot indexing information. Accordingly, terminals performing P2P communication classify the P2P map area 310, the slot area 320, and the contention access area 330 using slot index numbers, and identify slots in each area. When the indexed slots shown in FIG. 3B are compared to the first frame of the super frame shown in FIG. 3A, the P2P map area 310 occupies slots 1 and 2, and the slot area 320. Occupies slots 3 through 7.

The P2P map message includes a reference signal for synchronization, slot allocation information, and contention access area start information. The reference signal is a signal for super frame synchronization acquisition of terminals other than the P2PC, and is a signal promised between terminals, which is designed to be easily recognized, such as a preamble. The slot allocation information is information indicating which terminal the slots in the slot area 320 will use. The specific form of the slot allocation information varies according to embodiments. The contention access area start information is information indicating a start point of the contention access area 330 appearing after the slot area 320 and is represented by a slot number. However, the method of notifying the location and size of the contention access area 330 by notifying the starting point may be used when the contention access area 330 is located at the end of the super frame. Therefore, when the contention access area 330 is located at the end of the super frame according to another embodiment, the position and size of the contention access area 330 are known as other types of information.

The slot allocation and the form of the slot allocation information will be described below. According to an embodiment of the present invention, a slot allocation scheme is classified into a dedicated scheme and a dynamic scheme. The dedicated scheme is a method of fixedly allocating slots of the same number to a specific P2PM every super frame, and is suitable for a service such as Voice over Internet Protocol (VoIP), which is sensitive to delay. The dynamic scheme is a scheme in which slots are freely allocated for every super frame without the same limitation as the dedicated scheme. Therefore, when using the dedicated scheme, the P2P map message may not include allocation information for some or all slots in every super frame. However, when using the dynamic scheme, the P2P map message should include allocation information for all slots in every super frame. According to an embodiment of the present invention, the dedicated scheme and the dynamic scheme may be adaptively used during system operation, or only one may be fixedly used.

The P2PC uses downlink MAP message received from the serving base station to check the information on the resource being used for cellular communication. In addition, the P2PC informs P2PMs of subordinates of information on resources used for cellular communication. Accordingly, when indexing P2P radio resources, P2PC and P2PM allocate resources to areas other than those used by terminals performing cellular communication in the vicinity, and at the same time, resources used by terminals performing cellular communication Classify the P2P radio resources so that In addition, the P2PC allocates slots to the P2PMs with reference to resource information used by a terminal performing cellular communication in the vicinity. Cellular terminal detection of the P2PC may be performed in various ways. As an example of the uplink case, the P2PC checks an uplink resource allocated to a cellular terminal through a downlink map message received from a base station, and receives a signal received by itself through the downlink resource. Measure the power. The P2PC averages the received power for each terminal over several frames, and determines that a cellular terminal having an averaged received power over a threshold is present in an adjacent position.

4 illustrates a signal exchange for P2P communication in a broadband wireless communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the P2PC 410 transmits a P2P map message (step 401). In this case, the map message includes a reference signal, slot allocation information, contention access area start information, and is transmitted with a power small enough not to act as interference to a terminal not performing P2P communication.

By detecting the P2P map message, the P2PM-A 420 which intends to perform 2P2 communication recognizes that there is a P2PC 410 around it, and checks the contention access area through the P2P map message (step 403).

Thereafter, the P2PM-A 420 transmits a P2P participation request message to the P2PC 410 using the contention access area (step 405). In this case, it is assumed that the P2PM-A 420 requests P2P communication with the P2PM-B 430.

Upon receipt of the P2P participation request message, the P2PC 410 approves P2P communication to the P2PM-A 420 with reference to slot request information and counterpart terminal information included in the P2P participation request message, In step 407, a P2P participation ACK message is transmitted to the P2PMs.

Thereafter, the P2PC 410 allocates a slot for P2P communication between the P2PM-A 420 and the P2PM-B 430 and transmits a P2P map message including slot allocation information (step 409). Here, the map message includes the reference signal, the slot assignment information, the contention access area start information, and is transmitted with a power small enough to not interfere with the terminal not performing P2P communication.

Upon receiving the P2P map message, the P2PM-A 420 and the P2PM-B 430 perform P2P communication with each other using the allocated slot (step 411).

5 is a block diagram of a terminal in a broadband wireless communication system according to an exemplary embodiment of the present invention.

As shown in FIG. 5, the terminal includes a radio frequency (RF) receiver 502, an OFDM demodulator 504, a subcarrier mapper 506, a demodulator and decoder 508, an encoder and a modulator 510, and a subcarrier. Mapper 512, OFDM Modulator 514, RF Transmitter 516, Cellular Resource Identifier 518, P2P Resource Sorter 520, P2P Controller 522, P2P Message Processor 524, Data Buffer 526 It is configured to include).

The RF receiver 502 downconverts an RF band signal received through an antenna to a baseband signal. The OFDM demodulator 504 classifies signals provided from the RF receiver 520 in OFDM symbol units, removes a cyclic prefix (CP), and restores signals for each subcarrier through a fast fourier transform (FFT) operation. . The subcarrier mapper 506 extracts signals to be detected among subcarrier-specific signals provided from the OFDM demodulator 504. The demodulator and decoder 508 demodulates and decodes the signals provided from the subcarrier mapper 506 into information bit strings.

The encoder and modulator 510 encodes and modulates an information bit stream and converts the complex bit into complex symbols. The subcarrier mapper 512 maps the complex symbols provided from the encoder and modulator 510 to usable subcarriers. The OFDM modulator 514 converts subcarrier signals provided from the subcarrier mapper 512 into time-domain signals through an inverse fast fourier transform (IFFT) operation, and constructs an OFDM symbol by inserting a CP. do. The RF transmitter 516 up-converts the baseband signal provided from the OFDM modulator 514 to an RF band signal and transmits it through an antenna.

The cellular resource identifier 518 identifies a radio resource used for cellular communication through a map message received from the base station.

The P2P resource classifier 520 classifies the P2P radio resource region within the remaining radio resources except for the resources used for cellular communication. That is, the P2P resource classifier 520 determines a region to be used as a P2P radio resource in the remaining radio resources, divides the determined P2P radio resource region into slot units according to a promised rule, and then slots according to the promised rule. By indexing them, the P2P radio resource region is classified. Here, the P2P radio resource region is composed of a unit of a super frame grouping a plurality of cellular frames, one super frame is a P2P map region for transmitting and receiving P2P map messages, a slot region for transmitting and receiving P2P communication data, contention based And a contention access area for requesting P2P slot allocation. However, the P2P resource classifier 520 determines the P2P radio resource region by referring to cellular terminal information that acts on the interference screened by the P2P. That is, the P2P resource classifier 520 determines the P2P radio resource region such that the P2P resource classifier 520 is separated by a predetermined interval from the resource used by the cellular terminal acting the interference. In this case, the P2PC may be the terminal itself or may be another terminal.

The P2P controller 522 controls the overall function for performing P2P communication. When P2P communication is to be performed, for example, when P2P communication is performed by a user's manipulation, the P2P controller 522 controls the P2P message processor 524 to attempt to detect a P2P map message. The P2P controller 522 controls to perform P2P communication using resources allocated from the P2PC. In this case, the P2PC may be the terminal itself or may be another terminal. The function of the P2P controller 522 is divided into a function in the P2PC mode and a function in the P2PM mode, and is selectively performed according to the detection result of the P2P map message. The function of the P2P control unit 522 according to the mode will be described in detail after explaining the general function of each block.

The P2P message processor 524 generates and interprets a control message for P2P communication. In particular, in accordance with the present invention, the P2P message processor 524 attempts to detect a P2P map message at a promised location within the P2P radio resource. In this case, the detection of the P2P map message is performed using a reference signal included in the P2P map message. The function of the P2P message processor 524 is divided into a function in the P2PC mode and a function in the P2PM mode, and is selectively performed according to the detection result of the P2P map message. The function of the P2P message processor 524 according to the mode will be described in detail after explaining the general function of each block.

The data buffer 526 temporarily stores data to be transmitted through P2P communication, and outputs the stored data under the control of the controller 522.

When the detection of the P2P map message fails, the functions of the P2P controller 522 and the P2P message processor 524 are as follows.

If the detection of the P2P map message fails, the P2P controller 522 controls the terminal to operate as a P2PC. In other words, the P2P controller 522 determines whether to approve P2P communication of P2PMs present in the P2P group, allocates slots to the P2PMs, and controls to transmit a P2P map message. Accordingly, the P2P message processor 524 checks a P2P participation request message received from another terminal to perform P2P communication, generates a P2P participation ACK message in response to the P2P participation request message, and generates a P2P map message. Create The P2P participation request message is transmitted and received using the contention access area and includes slot request information. The P2P participation ACK message is transmitted and received using the contention access area, and includes information on the presence or absence of a counterpart terminal that wants P2P communication. The P2P map message has a predetermined size, is transmitted and received to a predetermined position in a P2P resource region, and includes a reference signal for obtaining frame synchronization of the P2PMs, slot allocation information, and contention access region start information. .

The P2P controller 522 allocates a slot according to a request of the P2PM, and the slot allocation scheme is divided into a dedicated allocation scheme and a dynamic allocation scheme. The P2P controller 522 may use only one of the dedicated allocation scheme and the dynamic allocation scheme, or may use two slot allocation schemes according to the traffic characteristics of each terminal. In addition, the P2P controller 522 scans the cellular terminal to interfere with the interference, and then controls to provide the P2PM with the cellular terminal to interfere with the interference. That is, the P2P message processor 524 generates a control message including cellular terminal information that acts on the interference.

When the P2P map message is successfully detected, the functions of the P2P controller 522 and the P2P message processor 524 are as follows. When the P2P map message is successfully detected, the P2P controller 522 controls the terminal to operate as a P2PM. In other words, the P2P controller 522 requests the P2P to participate in the P2P communication, and performs the P2P communication under the control of the P2PC. Accordingly, the P2P message processor 524 generates a P2P participation request message, confirms a P2P participation ACK message, and confirms a P2P map message. The P2P participation request message is transmitted and received using the contention access area and includes slot request information. The P2P participation ACK message is transmitted and received using the contention access area, and includes information on the presence or absence of a counterpart terminal that wants P2P communication. In addition, the P2P map message has a predetermined size, is transmitted and received to a predetermined position in a P2P resource region, and includes a reference signal for obtaining frame synchronization of the P2PMs, slot allocation information, and contention access region start information. . In addition, the P2P message processor 524 confirms a control message including cellular terminal information that acts on the interference.

6 is a flowchart illustrating an operation procedure of a terminal in a broadband wireless communication system according to an exemplary embodiment of the present invention.

As illustrated in FIG. 6, in step 601, the terminal determines a P2P radio resource region, divides the P2P radio resource region by slots, and indexes slots in order to start P2P communication. For example, as shown in FIG. 2, the P2P radio resource region is composed of a unit of super frame that combines a plurality of cellular frames, and one super frame is a P2P map region for transmitting and receiving a P2P map message, P2P communication. A slot area for transmitting and receiving data, and a contention access area for requesting P2P slot allocation on a contention basis. Slot indexing is performed as shown in FIG.

After determining the P2P radio resource region, the terminal proceeds to step 603 and attempts to detect a P2P map message. Here, the P2P map message has a predetermined size, is transmitted and received to a predetermined position in a P2P resource region, and includes a reference signal for obtaining frame synchronization of the P2PMs, slot allocation information, and contention access region start information. . That is, the terminal attempts to detect the reference signal included in the P2P map message at a predetermined position.

In step 605, the terminal determines whether there is a P2PC in the vicinity. That is, the terminal determines whether the detection of the P2P map message succeeds or fails.

If there is no P2PC nearby, i.e., if the P2P map message detection fails, the terminal proceeds to step 607 to enter the P2PC mode. In other words, the terminal enters a mode for controlling a plurality of P2PMs in the group.

After entering the P2PC mode, the terminal proceeds to step 609 to generate a P2P map message, and transmits the P2P map message. Since this procedure is intended to perform P2P communication, the terminal transmits a P2P map message including slot allocation information to itself. At the same time, the terminal transmits a P2P map message to inform neighboring terminals that the terminal is a P2PC.

In step 611, the terminal performs P2P communication with the counterpart terminal. That is, the terminal performs P2P communication with the counterpart terminal by using the slot allocated by the terminal.

In step 613, the terminal determines whether a P2P participation request message is received from another terminal. Here, the P2P participation request message is transmitted and received using the contention access area, and includes slot request information.

When the P2P participation request message is received, the terminal proceeds to step 615 to approve the P2P communication with reference to the slot request information and the counterpart terminal information included in the P2P participation request message and to participate in P2P to P2PMs subordinate to the peer. Send an ACK message. Here, the P2P participation ACK message is transmitted and received using the contention access area, and includes information on the presence or absence of a counterpart terminal that wants P2P communication.

After transmitting the P2P participation ACK message, the terminal proceeds to step 617 to allocate a slot for P2P communication of the terminal that sent the P2P participation request message. At this time, the slot allocation scheme is divided into a dedicated allocation scheme and a dynamic allocation scheme. The terminal uses only one of the dedicated allocation scheme and the dynamic allocation scheme or mixes two slot allocation schemes according to the traffic characteristics of each terminal.

After allocating the slot, the terminal proceeds to step 619 and transmits a P2P map message including slot allocation information. Here, the P2P map message includes the reference signal, the slot allocation information, and the contention access area start information.

In step 605, if there is a P2PC in the vicinity, that is, if the P2P map message detection is successful, the terminal proceeds to step 621 to enter the P2PM mode. That is, the terminal enters a mode for performing P2P communication under the control of the P2PC in the group.

After entering the P2PM mode, the terminal proceeds to step 623 and transmits a P2P participation request message to the P2PC. Here, the P2P participation request message is transmitted and received using the contention access area, and includes slot request information.

After transmitting the P2P participation request message, the terminal proceeds to step 625 to check whether a P2P participation ACK message is received from the P2PC. Here, the P2P participation ACK message is transmitted and received using the contention access area, and includes information on the presence or absence of a counterpart terminal that wants P2P communication.

When the P2P participation ACK message is received, the terminal proceeds to step 627 to check the allocated slot through the received P2P map message.

After checking the allocated slot, the terminal proceeds to step 629 to perform P2P communication with a counterpart terminal using the allocated slot.

Although not shown in FIG. 6, the terminal performs an operation for minimizing mutual interference with a terminal performing cellular communication during P2P communication. That is, when operating in the P2PC mode, the terminal scans the cellular terminal for interference, and then provides the cellular terminal information for the interference to the P2P member terminal subordinate to the terminal itself, when operating in the P2PM mode, The terminal confirms cellular terminal information that causes interference received from the P2PC. In addition, the terminal determines the P2P radio resource region to be separated from the resource used by the cellular terminal acting the interference by a predetermined interval or more.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

1 is a diagram illustrating a frame structure of a WINNER (Wireless world INitiative NEw Radio) system;

2 is a view showing a schematic relationship between terminals performing peer to peer (P2P) communication in a broadband wireless communication system according to the present invention;

3A illustrates an example of using a frame for P2P communication in a broadband wireless communication system according to the present invention;

3B is a diagram illustrating an example of indexing of radio resources for P2P communication in a broadband wireless communication system according to the present invention;

4 is a diagram illustrating a signal exchange for P2P communication in a broadband wireless communication system according to an embodiment of the present invention;

5 is a block diagram of a terminal in a broadband wireless communication system according to an embodiment of the present invention;

6 is a diagram illustrating an operation procedure of a terminal in a broadband wireless communication system according to an exemplary embodiment of the present invention.

Claims (25)

A terminal device in a broadband wireless communication system, An identifier for receiving uplink resource allocation information from a serving base station and identifying an unallocated remaining radio resource region using the uplink resource allocation information; A resource allocator for allocating P2P communication radio resources for peer-to-peer communication in the remaining radio resource region; And a communication unit for transmitting the P2P communication radio resource allocation information to a terminal performing P2P communication. The method of claim 1, And the uplink resource allocation information is resource allocation information for an uplink terminal communicating through a communication network being used by the serving base station. The method of claim 1, The uplink resource allocation information is information received from a serving base station to a specific terminal currently in service through a specific channel or information broadcasted to terminals in a cell periodically through a broadcast channel. Device. The method of claim 1, The communication unit, in transmitting the P2P communication radio resource allocation information, characterized in that for transmitting to the terminal that does not perform P2P communication with a power small enough to not act as interference. The method of claim 1, Determining an area to be used as a P2P radio resource in the remaining radio resources, dividing the determined P2P radio resource area into slots according to a promised rule, and then indexing slots according to the promised rule, thereby performing the P2P radio. And a classifier for classifying resource regions. The method of claim 5, The P2P radio resource zone, Consists of a unit of a super frame grouping a plurality of cellular frames, one super frame is a P2P map area for sending and receiving P2P map messages, a slot area for sending and receiving P2P communication data, competition to request P2P slot allocation on a contention basis And at least one area of the connection area. The method of claim 6, And a processor that attempts to detect a P2P map (MAP) message at a promised location within the P2P radio resource. The method of claim 7, wherein If the P2P map message is not received, the terminal controls itself to operate as a P2P coordinator, And a controller for controlling the terminal to operate as a P2P member when the P2P map message is received. The method of claim 8, The control unit, if the P2P map message is not received, characterized in that for assigning a slot in the P2P radio resources to the P2P communication member terminal subordinate to the terminal itself. The method of claim 9, The processor generates a P2P map message including at least one of a reference signal, slot allocation information, and contention access region start information for obtaining frame synchronization of the P2P communication member terminal. Device. The method of claim 9, The controller may include a slot using at least one of a dedicated allocation method for fixedly allocating slots of the same number every super frame or a dynamic method for allocating slots independently in every super frame. Device for assigning. The method of claim 9, The control unit, after scanning the cellular terminal that interferes with the control, controls to provide the cellular terminal information that interferes with the interference to the P2P member terminal subordinate to the terminal itself, And the classifier determines the P2P radio resource region to be separated by a predetermined interval from a resource used by the interfering cellular terminal. The method of claim 8, The control unit, if the P2P map message is received, characterized in that the control to transmit a P2P participation request message to the P2P coordinator terminal that transmitted the P2P map message. The method of claim 13, The processor checks cellular terminal information acting on interference received from the P2P coordinator terminal, And the classifier determines the P2P radio resource region to be separated by a predetermined interval from a resource used by the interfering cellular terminal. In a peer-to-peer communication method of a terminal in a broadband wireless communication system, Receiving uplink resource allocation information from a serving base station and identifying an unallocated remaining radio resource region using the uplink resource allocation information; Allocating a P2P communication radio resource for P2P communication to the remaining radio resource region; And transmitting the P2P communication radio resource allocation information to a terminal performing P2P communication. The method of claim 15, And the uplink resource allocation information is resource allocation information for an uplink terminal communicating through a communication network being used by the serving base station. The method of claim 15, The uplink resource allocation information is information received from a serving base station to a specific terminal currently serving through a specific channel or broadcasted to terminals in a cell periodically through a broadcast channel. How to. The method of claim 15, The P2P communication radio resource allocation information is transmitted to a terminal that does not perform P2P communication at a power low enough to not act as interference. The method of claim 15, Determining an area to be used as a P2P radio resource in the remaining radio resources; Dividing the determined P2P radio resource zone into slot units according to a promised rule; And indexing the slots according to the promised rules. The method of claim 19, The P2P radio resource zone, Consists of a unit of a super frame grouping a plurality of cellular frames, one super frame is a P2P map area for sending and receiving P2P map messages, a slot area for sending and receiving P2P communication data, competition to request P2P slot allocation on a contention basis At least one of the connection areas. The method of claim 20, And attempting to detect a P2P map (MAP) message at a promised location within the P2P radio resource. The method of claim 21, If the P2P map message is not received, operating the terminal itself as a P2P coordinator, and further comprising allocating slots in the P2P radio resource to P2P communication member terminals subordinate to the terminal itself. . The method of claim 22, And transmitting a P2P map message including at least one of a reference signal, slot allocation information, and contention access region start information for obtaining frame synchronization of the P2P communication member terminal. How to. The method of claim 22, Scanning the cellular terminal for interference and providing the cellular terminal information for interference to a P2P member terminal subordinate to the terminal itself; And determining the P2P radio resource region to be separated from the resource used by the cellular terminal acting the interference by a predetermined interval or more. The method of claim 21, If the P2P map message is received, operating the terminal itself as a P2P communication member (P2P Member), and further comprising the step of transmitting a P2P participation request message to the P2P coordinator terminal that sent the P2P map message. .

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