KR20070035851A - Apparatus and method for advertising the features of relay station in a multi-hop relay broadband wireless access communication system - Google Patents

Abstract

The present invention relates to an apparatus and method for providing relay station type information in a cellular communication system using a multi-hop relay scheme. In another embodiment, a method for providing relay station type information includes: transmitting, by a relay station, a message including its own type information to a terminal; obtaining, by the terminal, type information of the relay station from the message; A) performing an initial access procedure to the relay station using the obtained type information of the relay station. As such, the present invention provides the terminal with the type information of the relay station, so that the terminal and the relay station can perform an appropriate connection procedure according to the relay station type.

Relay communication system, relay station, relay station type information

Description

FIELD OF THE INVENTION Apparatus and method for providing relay station type information in a broadband wireless access communication system using a multi-hop relay method

1 is a diagram schematically showing the structure of a general IEEE 802.16e communication system.

2 is a diagram schematically illustrating a structure of a broadband wireless communication system using a multi-hop relay scheme for expanding a base station service area.

3 is a schematic diagram illustrating a structure of a broadband wireless communication system using a multi-hop relay scheme for increasing system capacity.

4 is a diagram illustrating a procedure for providing relay station type information to a terminal in a broadband wireless communication system using a multi-hop relay scheme according to an embodiment of the present invention.

5 is a diagram illustrating a procedure for providing relay station type information to a terminal in a broadband wireless communication system using a multi-hop relay scheme according to another embodiment of the present invention.

6 is a diagram illustrating a procedure for providing relay station type information to a terminal in a broadband wireless communication system using a multi-hop relay scheme according to another embodiment of the present invention.

7 is a diagram illustrating a procedure for providing relay station type information to a terminal in a broadband wireless communication system using a multi-hop relay scheme according to an embodiment of the present invention.

8 is a block diagram of a node in a broadband wireless communication system using a multi-hop relay method according to an embodiment of the present invention.

The present invention relates to a broadband wireless access communication system using a multi-hop relay scheme, and more particularly, to an apparatus and a method for providing relay station type information to a terminal in a broadband wireless access communication system using a multi-hop relay scheme.

In the 4th Generation (hereinafter, referred to as '4G') communication system, users of various quality of service (hereinafter referred to as 'QoS') having a transmission rate of about 100 Mbps are provided to users. Active research is underway to provide to the community. In particular, broadband wireless access (BWA) such as a wireless local area network (hereinafter referred to as "LAN") system and a wireless metropolitan area network (hereinafter referred to as "MAN") system Research is being actively conducted in the form of ensuring mobility and high speed and quality of service (QoS) services in wireless access communication systems, and the representative communication systems are IEEE (Institute of Electrical and Electronics Engineers). 802.16d communication system and IEEE 802.16e communication system.

The IEEE 802.16d communication system and the IEEE 802.16e communication system are orthogonal frequency division multiplexing (OFDM) / orthogonal frequency division multiple access (OFDM) for a physical channel. OFDMA: Orthogonal Frequency Division Multiple Access (hereinafter, referred to as 'OFDMA') is used. The IEEE 802.16d communication system is a system in which a subscriber station (SS) (hereinafter referred to as SS) is currently fixed, that is, a state in which no mobility of the SS is considered and only a single cell structure is considered. . In contrast, the IEEE 802.16e communication system is a system that considers the mobility of the SS in the IEEE 802.16d communication system, and the SS having the mobility is referred to as a mobile terminal (MS). do.

1 is a diagram schematically illustrating a structure of a general IEEE 802.16e communication system.

Referring to FIG. 1, the IEEE 802.16e communication system has a multi-cell structure, that is, a base station (BS) 110 having a cell 100 and a cell 150 and managing the cell 100. And a base station 140 that manages the cell 150 and a plurality of MSs 111, 113, 130, 151, and 153. Signal transmission and reception between the base stations 110 and 140 and the MSs 111, 113, 130, 151 and 153 is performed using the OFDM / OFDMA scheme. Herein, the MS 130 among the MSs 111, 113, 130, 151, and 153 is located in a boundary region of the cell 100 and the cell 150, that is, a handover region. Accordingly, when the MS 130 moves toward the cell 150 managed by the base station 140 while transmitting and receiving a signal with the base station 110, the serving BS moves to the base station 110. Is changed to the base station 140.

In the general IEEE 802.16e communication system, since signaling is transmitted and received through a direct link between the fixed base station and the MS as shown in FIG. 1, a reliable wireless communication link can be easily configured between the base station and the MS. However, in the IEEE 802.16e communication system, since the location of the base station is fixed, the flexibility of the wireless network configuration is low, and thus, it is difficult to provide an efficient communication service in a wireless environment in which the traffic distribution and the call demand change are severe.

In order to overcome this disadvantage, a multi-hop relay data transfer scheme can be applied to a general cellular wireless communication system such as the 802.16e communication system using a fixed relay station, a mobile relay station, or general MSs. have. The wireless communication system using the multi-hop relay method can quickly reconfigure the network in response to changes in the communication environment, and can operate the entire wireless network more efficiently. For example, a wireless communication system using the multi-hop relay scheme can expand cell service area and increase system capacity. That is, when the channel state between the base station and the MS is poor, a relay station may be provided between the base station and the MS to configure a multi-hop relay path through the relay station, thereby providing the MS with a better channel state. In addition, by using the multi-hop relay scheme in a cell boundary region having a poor channel state from a base station, it is possible to provide a faster data channel and expand a cell service area.

Next, a structure of a wireless communication system using a multi-hop relay scheme for expanding the base station service area will be described.

2 is a diagram schematically illustrating a structure of a broadband wireless communication system using a multi-hop relay scheme for expanding a base station service area.

Referring to FIG. 2, the multi-hop relay wireless communication system has a multi-cell structure, that is, a cell 200 and a cell 240, and a base station (BS) 210 that manages the cell 200. ), A base station 250 that manages the cell 240, a plurality of MSs 211 and 213 located in an area of the cell 200, and the base station 210 manage the cell 200. A relay station that provides a multi-hop relay path between a plurality of MSs 221 and 223 present in an area 230 outside the area and between the base station 210 and the MSs 221 and 223 present in the area 230. 220, a plurality of MSs 251, 253, and 255 located within an area of the cell 240, and a plurality of MSs 251, 253, and 255 that are managed by the base station 250 but present in an area 270 outside the area of the cell 240. The relay station 260 provides a multi-hop relay path between the MSs 261 and 263 of the MSs and the MSs 261 and 263 existing in the region 270. Here, signal transmission and reception between the base stations 210 and 250, the relay stations 220 and 260, and the MSs 211, 213, 221, 223, 251, 253, 255, 261 and 263 are performed in the OFDM / OFDMA. Is done using the method.

In this case, the MSs 211 and 213 and the RS 220 included in the cell 200 area may directly transmit and receive a signal to or from the base station 210, but the MSs present in the area 230 may be used. 221 and 223 do not directly transmit and receive signals with the base station 210. Accordingly, the relay station 220 controls the area 230 and relays a signal between the base station 210 and the MSs 221 and 223 that cannot directly transmit and receive a signal, and the MSs 221 and 223. ) May transmit and receive signals to and from the base station 210 via the relay station 220. In addition, although the MSs 251, 253, and 255 included in the cell 240 region and the RS 260 may directly transmit and receive signals with the base station 250, the MSs present in the region 270 may be used. The fields 261 and 263 may not directly transmit / receive signals with the base station 250. Accordingly, the relay station 260 manages the area 270 and relays a signal between the base station 250 and the MSs 261 and 263 that cannot directly transmit and receive a signal, and the MSs 261 and 263. ) May transmit and receive signals to and from the base station 250 through the relay station 260.

Next, a structure of a wireless communication system using a multi-hop relay scheme for increasing system capacity will be described.

3 is a diagram schematically illustrating a structure of a broadband wireless communication system using a multi-hop relay scheme for increasing system capacity.

Referring to FIG. 3, the multi-hop relay wireless communication system includes a base station 310 and a plurality of MSs 311, 313, 321, 323, 331, and 333 and the base station 310 and the MSs 311 and 313. , 321, 323, 331, and 333 are relay stations 320 and 330 that provide a multi-hop relay path. The base station 310, the relay stations 320 and 330, and the MSs 311, 313, 321, 323, 331, and 333 transmit and receive signals using the OFDM / OFDMA scheme. The base station 310 manages the cell 300, and the MSs 311, 313, 321, 323, 331, and 333 and the relay stations 320 and 330 included in the cell 300 area are connected to the base station ( 310 may directly transmit and receive a signal.

However, when located near the edge of the cell 300, such as the some MSs (321, 323, 331, 333), a direct link between the base station 310 and the some MSs (321, 323, 331, 333) The received signal-to-noise ratio (SNR) may be low. Accordingly, the relay station 320 relays unicast traffic between the base station 310 and the MSs 321 and 323, and the MSs 321 and 323 communicate with the base station 310 through the relay station 320. Send and receive cast traffic. In addition, the relay station 330 relays the unicast traffic of the base station 310 and the MSs 331 and 333, and the MSs 331 and 333 are connected to the base station through the relay station 330. 310 transmits and receives unicast traffic. In other words, the RSs 320 and 330 may provide high-speed data transmission paths to the MSs 321, 323, 331 and 333 to increase effective transmission rates and increase system capacity of the MSs.

Here, in the broadband wireless communication system using the multi-hop relay of FIG. 2 or 3, the relay stations 220, 260, 320, 330 are installed by the service provider, so that the base stations 210, 250, 310 It may be an infrastructure relay station known and managed in advance, or a client relay station operating as a subscriber station (SS or MS) or a relay station according to a situation. Also, the relay stations 220, 260, 320, and 330 may be fixed relay stations without mobility, nomadic relay stations (eg, laptops) having nomadic characteristics, or mobile relay stations with mobility such as the MS. Can be.

In a wireless communication system using a multi-hop relay method through various types of relay stations as described above, in order for an MS to communicate with a base station through the relay station, an access procedure with the relay station must be performed, and the access procedure is the relay station type. It may vary. Therefore, in a wireless communication system using the multi-hop relay method, it is necessary to define a signaling procedure for informing the MS of type information of a relay station to which the MS performs the access procedure.

Accordingly, an object of the present invention is to provide an apparatus and method for informing a terminal of type information of a relay station for providing relay communication in a broadband wireless access communication system using a multi-hop relay method.

Another object of the present invention is to provide an apparatus and method for informing a terminal of type information of an adjacent relay station in a broadband wireless access communication system using a multi-hop relay scheme.

According to an aspect of the present invention for achieving the above object, a communication method in a cellular communication system using a multi-hop relay method, the relay station, the process of transmitting a message containing its type information to the terminal, and the terminal The method may include obtaining type information of the relay station from the message, and performing, by the terminal, an initial access procedure to the relay station using the obtained type information of the relay station.

According to another aspect of the present invention, in a cellular communication system using a multi-hop relay method, a communication method includes a process of a serving station transmitting a message including type information of a neighboring relay station managed by a serving station to a terminal; And acquiring, by the terminal, type information of an adjacent relay station from the message, and performing, by the terminal, a handover and network re-entry procedure using the acquired type information of the relay station. do.

According to still another aspect of the present invention, in a cellular communication system using a multi-hop relay method, a relay station apparatus includes a message generator for generating a message including type information of the relay station, and a message from the message generator. It characterized in that it comprises an interface module for converting according to the radio standard to transmit through the antenna.

According to still another aspect of the present invention, in a cellular communication system using a multi-hop relay method, a serving station apparatus includes a message generator for generating a message including type information of an adjacent relay station managed by the serving station. And an interface module for converting the message from the message generating unit according to a prescribed radio standard and transmitting the same through an antenna.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

The present invention relates to a serving relay station and a neighbor to a mobile station (MS) in a broadband wireless access (BWA) communication system using a multi-hop relay scheme. We propose a signaling procedure for providing type information of a neighbor relay station.

Here, the broadband wireless access communication system using the multi-hop relay method is, for example, orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA). Frequency division multiple access, hereinafter referred to as " OFDMA. &Quot; In the broadband wireless access communication system using the multi-hop relay method, since the OFDM / OFDMA method is used, high-speed data transmission is possible by transmitting a physical channel signal using a plurality of sub-carriers. A multi-cell architecture can support MS mobility.

In the following description, a broadband wireless access communication system is described as an example, but the present invention may be equally applicable to a cellular-based communication system using a multi-hop relay method.

4 illustrates a procedure for providing a relay station type information to a terminal in a broadband wireless communication system using a multi-hop relay scheme according to an embodiment of the present invention.

Referring to FIG. 4, first, the terminal 440 powered on determines the relay station 410 as a serving station in step 411, and transmits a downlink preamble transmitted by the relay station 410. Receive a system synchronization with the relay station 410. After acquiring the system synchronization, the terminal 440 receives a DL-MAP message and a Downlink Channel Descriptor (DDC) message from the RS 410 in step 413. In this case, the DCD message includes a downlink channel characteristic and type information of the relay station 410.

Here, the relay station type encoding information (TVL: Type / Value / Length) according to the present invention is shown in Table 1 below.

Name Type (1 byte) Length (bytes) Value RS type TBD One Bit 0: infrastructure relay station Bit 1: client relay station Bit 2: fixed Bit 3: nomadic Bit 4: mobile Bit 5-7: reserved; shall be set to zero

As shown in Table 1, the RS type encoding information according to the present invention includes a name of the encoding (RS type) and a type of encoding (TBD: To be determined, hereinafter referred to as 'TBD'). And the size of the encoding (1 byte) and the encoding value. The encoding value of the RS type is an infrastructure relay station installed by the service provider so that the relay station 410 is installed by the service provider, or is a general subscriber station or a client having a relay function. ) Indicates information indicating whether the relay station is a station. The client relay station may include a fixed terminal as well as a mobile terminal such as the MS 440. In addition, the encoding value of the RS type indicates information on whether the RS 410 is a fixed RS, a nomadic RS, or a mobile RS. The MS recognizes the type of the relay station using the encoding information of the RS type, and performs an initial access procedure necessary for communicating with the base station according to the relay station type.

That is, after receiving the DL-MAP message and the DCD message, the terminal 440 obtains information (parameters) necessary for an initial access procedure from the received messages in step 415. That is, according to the present invention, the terminal 440 obtains relay station type information from the DCD message in step 415. As such, the relay station type information may be provided to the terminal through the DCD message, or may be provided to the terminal through a separate new message.

As described above, after acquiring the relay station type information, the terminal 440 receives an Uplink Channel Descriptor (UCD) message and an UL (Uplink) -MAP message from the relay station 410 in step 417, and receives the UCD message from the UCD message. Acquire uplink parameters. The UL-MAP message includes initial ranging opportunities section information and the like, and the UCD message includes uplink channel characteristic information and initial ranging related parameters.

Thereafter, the terminal 440 performs an initial ranging procedure with the relay station 410 in step 419, and performs a basic capability negotiation procedure with the relay station 410 in step 421. In step 423, the terminal 440 performs an authorization procedure for communicating with the base station through the relay station 410. The authentication procedure may vary depending on the relay station type information obtained in step 415. Since the authentication procedure is not directly related to the present invention, a detailed description thereof will be omitted. After performing the authentication procedure, the terminal 440 proceeds to step 425 and performs a registration procedure to the base station through the relay station 410.

5 is a flowchart illustrating a procedure for providing relay station type information to a terminal in a broadband wireless communication system using a multi-hop relay scheme according to another embodiment of the present invention.

Referring to FIG. 5, first, the terminal 540 powered on determines the relay station 510 as a serving station in step 511 and receives the downlink preamble transmitted from the relay station 510 to receive the relay station 510. System synchronization with) is obtained. After acquiring the system synchronization, the terminal 540 receives a DL-MAP message and a Downlink Channel Descriptor (DDC) message from the RS 510 in step 513, and downlink channel characteristic information from the received messages. And so on.

In step 515, the terminal 540 receives a UL-MAP message and an Uplink Channel Descriptor (UCD) message from the relay station 510, and receives initial ranging opportunity period information and uplink channel characteristics from the received messages. Obtain information, initial ranging related parameters, and the like.

In step 517, the terminal 540 performs an initial ranging procedure with the RS 510, and performs a basic capability negotiation procedure with the RS 510 in step 519. In step 521, the terminal 540 acquires the type information of the relay station from the basic capability information message (eg, SBC-RSP message) received from the relay station 510 in the basic capability negotiation procedure. The relay station type information has a structure as shown in Table 1.

In step 523, the terminal 540 performs an authentication procedure for communicating with the base station through the relay station 510. The authentication procedure may vary depending on the relay station type information obtained in step 521. Since the authentication procedure is not directly related to the present invention, a detailed description thereof will be omitted. After performing the authentication procedure, the terminal 540 proceeds to step 525 to perform a registration procedure to the base station through the relay station 510.

4 and 5 illustrate the case in which the terminal acquires relay station type information in the process of performing an initial access procedure with the relay station. In addition, there may be a case where the base station obtains the relay station type information from the base station while the base station operates as a serving station of the terminal. This is described in detail below.

6 illustrates a procedure for providing relay station type information to a terminal in a broadband wireless communication system using a multi-hop relay scheme according to another embodiment of the present invention.

Referring to FIG. 6, first, the terminal 640 that is powered on determines the base station 610 as a serving station in step 611, receives a downlink preamble transmitted by the base station 610, and receives the base station 610. System synchronization with) is obtained. After acquiring the system synchronization, the terminal 640 receives a DL-MAP message and a Downlink Channel Descriptor (DCD) message from the base station 610 in step 613, and downlink channel characteristic information from the received messages. And so on.

In step 615, the terminal 640 receives an UL-MAP message and an Uplink Channel Descriptor (UCD) message from the base station 610, and receives initial ranging opportunity period information and uplink channel characteristics from the received messages. Obtain information, initial ranging related parameters, and the like.

 Thereafter, the terminal 640 performs an initial ranging procedure with the base station 610 in step 617, and performs a basic capability negotiation procedure with the base station 610 in step 619. In step 621, the terminal 640 performs an authentication procedure necessary for communication with the base station 610, and performs a registration procedure with the base station 610 in step 623.

As described above, after completing the initial access procedure, the terminal 640 receives a serving cell relay station information message including type information of neighboring relay stations managed by the base station 610 in step 625, and in step 627. Obtain type information of neighboring relay stations from the received serving cell relay station information message. The serving cell RS information message may be a broadcast message transmitted to all terminals or a unicast message transmitted to a specific terminal.

Here, the serving cell RS information message structure is shown in Table 2 below.

Syntax Size (bits) Notes RS_INFO_Message_Format () {   Management Message Type = TBD 8 To be determined N_RS 8 Number of RS in serving cell   For (i = 0; i <N_RS; i ++) {     RS ID 48 Identifier of RS     RS type 8 RS type information bit # 0: infrastructure relay station bit # 1: client relay station bit # 2: fixed bit # 3: nomadic bit # 4: mobile bit # 5-7: reserved;   } }

As shown in Table 2, the RS_INFO message according to the present invention includes a plurality of IEs, that is, a message type (Management Message Type) indicating a type of a message to be transmitted, and a number of relay stations included in the message. A number of RS serving cells, an identifier (ID) of each relay station, and type information (RS type) of each relay station are included.

The relay station type information indicates whether it is an infrastructure relay station installed by a service provider and thus known and managed by the base station 610, or whether it is a general subscriber station but a client relay station having a relay function. The client relay station may be a mobile terminal such as MS 640 or a fixed terminal. In addition, the relay station type information indicates whether the relay station 650 is a fixed relay station, a nomadic relay station, or a mobile relay station. The MS 640 recognizes the type of relay station to perform an access procedure using the relay station type information, and performs an access procedure with the relay station according to the recognized relay station type.

Meanwhile, the RS_INFO message of Table 2 may have the same message structure as a neighbor RS Advertisement message of a serving cell area providing information required for synchronization acquisition between the terminal and the RS. have. Here, the neighboring relay station information message may include identifier information of the relay station existing in the serving cell region, preamble information, information necessary for obtaining synchronization with the relay station, information necessary for relay communication through the relay station, and the like. . Accordingly, in the case of having the same message structure as the neighboring relay station information message, the relay station information (RS_INFO) message of Table 2 may be added as one parameter of the neighboring relay station information message.

As such, after acquiring the type information of the relay station 650 to communicate with, the terminal 640 performs a ranging procedure with the relay station 650 using the obtained type information of the relay station 650 in step 629. In step 631, the remaining procedures (basic capability negotiation procedure, authentication procedure, registration procedure, etc.) necessary for the traffic relay of the relay station 650 are performed.

Meanwhile, in another embodiment, type information of an adjacent relay station may be obtained from a serving station (base station or relay station) in communication.

7 illustrates a procedure for providing relay station type information to a terminal in a broadband wireless communication system using a multi-hop relay scheme according to another embodiment of the present invention.

Referring to FIG. 7, first, the terminal 740 communicates with the serving station 710 in step 711. In this case, the serving station 710 may be a base station or a relay station. During the communication, the terminal 740 receives a neighbor RS Advertisement message transmitted by the serving station 710 in step 713, and receives type information of the neighbor RS from the received message in step 715. Acquire. The obtained type information of the neighboring relay station is shown in Table 1, and may be included as a parameter of the neighboring relay station information message.

Meanwhile, the terminal 740 may perform handover to one of the neighbor base stations or the neighbor relay stations. When the terminal 740 is handed over to one of the neighboring relay stations included in the neighboring relay station information message, the relay station type information may be a criterion for selecting a target relay station to be handed over. That is, when there are several target relay station candidates among the neighboring relay stations, the terminal 740 may select the target relay station by comparing the neighboring relay station type information.

That is, when a handover is necessary, the terminal 740 compares the obtained neighboring relay station type information in step 717 to determine a target relay station 750, and in step 719, the network re-entry procedure with the determined target relay station 750. Perform Even during the network re-entry procedure, the terminal 740 may utilize the acquired type information of the target relay station 750. Since network re-entry procedures using the type information are not directly related to the present invention, a detailed description thereof will be omitted.

Hereinafter, a block diagram of a terminal MS, a relay station RS, and a base station BS will be described. Since the terminal MS, the relay station RS, and the base station BS having the same interface module (communication module) have the same block configuration, an operation of the terminal, the relay station, and the base station with one device will be described below. do.

8 is a block diagram of a terminal (or relay station or base station) according to an embodiment of the present invention. The following description will focus on the control message processing.

First, referring to FIG. 8, a configuration of a terminal is as follows.

The interface module 821 is a module for communicating with a relay station or a base station, and includes an RF processor and a baseband processor. The RF processor converts a signal received through an antenna into a baseband signal and provides the baseband signal to the baseband processor, and transmits a baseband signal from the baseband processor on an actual air. Transmit to and transmit through the antenna. For example, when the broadband wireless access method is used, the baseband processor transfers the original signal to the controller 819 by performing FFT (Fast Fourier Transform) operation and channel decoding on the signal from the RF processor. Conversely, channel encoding and inverse fast fourier transform (IFFT) operations are performed on the data from the controller 819 and provided to the RF processor.

The controller 819 controls the overall operation of the terminal. For example, it performs processing and control for voice calls and data communications, and handles operations related to relay station type information in accordance with the present invention in addition to conventional functions. According to the present invention, the control unit 819 provides a control message received from the relay station or the base station to the message processing unit 811 and receives a message to be transmitted to the relay station or the base station from the message generator 813. 821).

The storage unit 817 stores a program for controlling the overall operation of the terminal and temporary data generated during program execution. That is, the storage unit 817 may generally store data and control information to be transmitted to the relay station or the base station.

The message processing unit 811 decomposes the control message received from the relay station or the base station and notifies the control unit 819 of the result. When receiving the message including the relay station type information of Table 1 or Table 2, according to the present invention, the control unit 819 extracts various control information included in the message including the relay station type information. to provide. Then, the controller 819 performs a corresponding process according to the control information from the message processor 811.

The relay station type information processing unit 815 processes the relay station type information received from the relay station or the base station under the control of the control unit 819, generates information necessary for a communication procedure with the relay station, and provides the same to the control unit 819. In addition, the relay station type information processing unit 815 manages adjacent relay station type information received from the relay station or the base station.

The message generator 813 generates a message to be transmitted to the relay station or the base station under the control of the controller 819 and transmits the message to the controller 819. The message generated by the message generator 813 is transferred to the interface module 821 through the controller 819.

In the above configuration of the terminal, the controller 819 controls the message processing unit 811, the message generating unit 813, and the relay station type information processing unit 815. That is, the controller 819 may perform the functions of the message processor 811, the message generator 813, and the relay station type information processor 815. In the present invention, it is shown to configure them separately to explain each function separately. Therefore, when the product is actually implemented, all of them may be configured to be processed by the controller 819, and only some of them may be configured to be processed by the controller 819.

Next, a configuration of the relay station will be described with reference to FIG. 8.

The interface module 821 is a module for communicating with a terminal or a base station, and includes an RF processor, a baseband processor, and the like. The RF processor converts a signal received through an antenna into a baseband signal and provides the baseband signal to the baseband processor, and transmits a baseband signal from the baseband processor on an actual air. Transmit to and transmit through the antenna. For example, when using a broadband wireless access method, the baseband processor controls the fast Fourier transform (FFT) and channel decodes a signal from the RF processor to control the original information data (traffic or control message). To pass). On the contrary, channel data and IFFT (Inverse Fast Fourier Transform) calculation are performed on the information data from the controller 819 and provided to the RF processor.

The controller 819 controls the overall operation of the relay station. For example, it performs processing and control for voice call and data communication, and processes operations related to relay station type information information according to the present invention in addition to the usual functions. According to the present invention, the control unit 819 provides a control message received from the terminal or the base station to the message processing unit 811 and receives a message to be transmitted to the terminal or the base station from the message generating unit 813 to the interface module ( 821).

The storage unit 817 stores a program for controlling the overall operation of the relay station and temporary data generated during program execution. That is, the storage unit 817 may store data and control information to be transmitted to the terminal or the base station.

The message processor 811 disassembles the control message received from the terminal or the base station and provides the result to the controller 819. When a message is received from the terminal or the base station according to the present invention, various control information included in the received message is extracted and provided to the controller 819. Then, the controller 819 performs a corresponding process according to the control information from the message processor 811.

The relay station type information processing unit 815 manages the terminals managed by the relay station and the relay station type information to be provided to the terminals under the control of the controller 819. That is, the relay station type information processing unit 815 collects type information of the neighboring relay station, and processes an operation for broadcasting the collected type information of the neighboring relay station or unicasting to a specific terminal.

The message generator 813 generates a message including the relay station type information of Table 1 or Table 2 to be transmitted to the terminal under the control of the controller 819 and provides the message to the controller 819. The message generated by the message generator 813 is transferred to the interface module 821 through the controller 819.

In the above-described configuration of the relay station, the controller 819 controls the message processor 811, the message generator 813, and the relay station type information processor 815. That is, the controller 819 may perform the functions of the message processor 811, the message generator 813, and the relay station type information processor 815. In the present invention, it is shown to configure them separately to explain each function separately. Therefore, when the product is actually implemented, all of them may be configured to be processed by the controller 819, and only some of them may be configured to be processed by the controller 819.

Next, the configuration of the base station with reference to FIG. 8 is as follows.

The interface module 821 is a module for communicating with a terminal or a relay station, and includes an RF processor, a baseband processor, and the like. The RF processor converts a signal received through an antenna into a baseband signal and provides the baseband signal to the baseband processor, and transmits a baseband signal from the baseband processor on an actual air. Transmit to and transmit through the antenna. For example, when using a broadband wireless access method, the baseband processor controls the fast Fourier transform (FFT) and channel decodes a signal from the RF processor to control the original information data (traffic or control message). To pass). On the contrary, channel data and IFFT (Inverse Fast Fourier Transform) calculation are performed on the information data from the controller 819 and provided to the RF processor.

The controller 819 controls the overall operation of the base station. For example, it performs processing and control for voice call and data communication, and processes operations related to the relay station type information of the terminal according to the present invention in addition to the usual functions. According to the present invention, the control unit 819 provides a control message received from a terminal or a relay station to the message processing unit 811 and receives a message to be transmitted to the terminal or relay station from the message generator 813. 821).

The storage unit 817 stores a program for controlling the overall operation of the base station and temporary data generated during program execution. That is, the storage unit 817 may generally store data and control information to be transmitted to the terminal or the relay station.

The message processing unit 811 decomposes the control message received from the terminal or the relay station and notifies the control unit 819 of the result. When a message is received from the relay station or the terminal according to the present invention, various control information included in the received message is extracted and provided to the controller 819. Then, the controller 819 performs a corresponding process according to the control information from the message processor 811.

The relay station type information processing unit 815 manages terminals managed by the base station and relay station type information to be provided to the terminals under the control of the controller 819. According to the present invention, the relay station type information processing unit 815 collects type information of a neighboring relay station, and processes an operation for broadcasting the collected type information of the neighboring relay station or unicasting to a specific terminal.

The message generator 813 generates a message to be transmitted to the terminal or relay station under the control of the controller 819 and provides the message to the controller 819. According to the present invention, a message including the relay station type information of the <Table 1> or the <Table 2> to be transmitted to the terminal is generated and provided to the controller 819. The message generated by the message generator 813 is transferred to the interface module 821 through the controller 819.

In the above-described configuration of the base station, the controller 819 controls the message processor 811, the message generator 813, and the relay station type information processor 815. That is, the controller 819 may perform the functions of the message processor 811, the message generator 813, and the relay station type information processor 815. In the present invention, it is shown to configure them separately to explain each function separately. Therefore, when the product is actually implemented, all of them may be configured to be processed by the controller 819, and only some of them may be configured to be processed by the controller 819.

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.

As described above, the present invention provides a relay station capable of providing a multi-hop relay path between the terminal and the base station when the direct link channel situation between the base station and the terminal is poor in a broadband wireless access communication system using the OFDM / OFDMA scheme. By using the same, it is possible to provide the terminal with the same service and function as the case of performing communication using the direct link with the base station through the relay station. In particular, the present invention provides the terminal with the type information of the relay station capable of providing the multi-hop relay path, so that the terminal and the relay station can perform an appropriate access procedure according to the relay station type. In addition, the relay station type information may be utilized to select a target relay station to be handed over by the terminal.

Claims (37)

In a communication method of a relay station in a cellular communication system using a multi-hop relay method, Generating a message including type information of the relay station; Transmitting the generated message to a terminal. The method of claim 1, The type information of the relay station is characterized by designating at least one of an infrastructure relay station, a client relay station, a fixed relay station, a nomadic relay station, a mobile relay station. The method of claim 1, The message is a message for providing downlink channel descriptor information to the terminal. The method of claim 1, The message is a message for basic capability negotiation. In a communication method of a serving station in a cellular communication system using a multi-hop relay method, Generating a message including type information of neighboring relay stations managed by the serving station; Transmitting the generated message to a terminal. The method of claim 5, The type information of the relay station is characterized by designating at least one of an infrastructure relay station, a client relay station, a fixed relay station, a nomadic relay station, a mobile relay station. The method of claim 5, The message is a message for advertising information of neighboring relay stations. The method of claim 5, And the serving station is a base station or a relay station. In a communication method of a terminal in a cellular communication system using a multi-hop relay method, Receiving a message including type information of the relay station when the relay station is connected; Acquiring type information of a relay station from the received message. The method of claim 9, And performing an initial access procedure by using the acquired type information of the relay station. The method of claim 9, The type information of the relay station is characterized by designating at least one of an infrastructure relay station, a client relay station, a fixed relay station, a nomadic relay station, a mobile relay station. The method of claim 9, The message is a message for providing downlink channel descriptor information to the terminal. The method of claim 9, The message is a message for basic capability negotiation. In a communication method of a terminal in a cellular communication system using a multi-hop relay method, Receiving a message including type information of an adjacent relay station managed by a serving station, Acquiring type information of a relay station from the received message. The method of claim 14, And the serving station is a base station or a relay station. The method of claim 14, And performing an initial access procedure to an adjacent relay station by using the obtained type information of the relay station. The method of claim 14, Determining a relay station to be handed over in consideration of the obtained type information of the relay station; And performing a network re-entry procedure using the determined type information of the relay station. The method of claim 14, The type information of the relay station is characterized by designating at least one of an infrastructure relay station, a client relay station, a fixed relay station, a nomadic relay station, a mobile relay station. The method of claim 14, The message is a message for advertising information of neighboring relay stations. A communication method in a cellular communication system using a multi-hop relay method, Transmitting, by the relay station, a message including its type information to the terminal; Acquiring, by the terminal, type information of the relay station from the message; And performing, by the terminal, an initial access procedure to the relay station by using the obtained type information of the relay station. The method of claim 21, The type information of the relay station is characterized by designating at least one of an infrastructure relay station, a client relay station, a fixed relay station, a nomadic relay station, a mobile relay station. The method of claim 21, The message is a message for providing downlink channel descriptor information to the terminal. The method of claim 21, The message is a message for basic capability negotiation. In a communication method in a cellular communication system using a multi-hop relay method, A serving station transmitting a message to the terminal, the message including type information of a neighboring relay station managed by the serving station; Acquiring, by the terminal, type information of a neighboring relay station from the message; And performing, by the terminal, a handover and a network re-entry procedure using the obtained type information of the relay station. The method of claim 24, And the serving station is a base station or a relay station. The method of claim 24, The type information of the relay station is characterized by designating at least one of an infrastructure relay station, a client relay station, a fixed relay station, a nomadic relay station, a mobile relay station. The method of claim 24, The message is a message for advertising information of neighboring relay stations. In a relay station apparatus in a cellular communication system using a multi-hop relay method, A message generator for generating a message including type information of the relay station; And an interface module for converting a message from the message generating unit according to a prescribed radio standard and transmitting the same through an antenna. The method of claim 28, The type information of the relay station is characterized in that at least one of the infrastructure (client), client (fixed), fixed (fixed), nomadic relay station, mobile relay station. The method of claim 28, The message is characterized in that the message for providing a downlink channel descriptor information (downlink channel descriptor) to the terminal. The method of claim 28, And said message is a message for basic capability negotiation. The method of claim 28, And the interface module is an orthogonal frequency division multiplexing (OFDM) communication module. In a serving station apparatus in a cellular communication system using a multi-hop relay method, A message generator for generating a message including type information of an adjacent relay station managed by the serving station; And an interface module for converting a message from the message generating unit according to a prescribed radio standard and transmitting the same through an antenna. The method of claim 33, wherein The type information of the relay station, the apparatus characterized in that at least one of an infrastructure relay station, a client (client) relay station, a fixed (fixed) relay station, a nomadic relay station, a mobile relay station. The method of claim 33, wherein And the message is a message for advertising information of neighboring relay stations. The method of claim 33, wherein And the serving station is a base station or a relay station. The method of claim 33, wherein And the interface module is an orthogonal frequency division multiplexing (OFDM) communication module.

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