KR20100094309A - Method of transmitting data via a relay station in a broadband wireless access system - Google Patents

Abstract

PURPOSE: A data communications method is provided to classify data for each terminal which passes a relay station by using a header structure. CONSTITUTION: A mapping information is included in a relay medium access control protocol data unit. The relay station medium access control protocol data unit is transmitted to a receiving terminal. The mapping information is included in the relay station medium access control protocol data unit. The mapping information comprises at least a part among the number of terminals a station identifier of the terminals.

Description

Method of transmitting data via a relay station in a broadband wireless access system

The present invention relates to a wireless communication system, and more particularly, to a data transmission method in a mobile communication system including a relay station for recognizing a terminal.

A relay station (RS) is proposed for the purpose of extending cell coverage and increasing throughput of a mobile communication system. The relay station supports IEEE 802.16e / 16m terminals, and has some functions of a base station, and provides network entry, mobility, and radio resource management (RRM) of point-to-multipoint (PMP) -based relay stations. : Active Repeater which can include Radio Resource Management) and Security. The RS decodes the signal received from the transmitter, re-encodes it, and delivers it to the receiver, which serves as a digital amplifier that can achieve high performance using noise reduction and higher data rate coding. Can be. On the other hand, communication through a relay station has a disadvantage in that a delay may occur during decoding and encoding. In addition, in the communication through the relay station, the backward compatibility problem of the PMP mode should be considered.

Types of relay stations are classified as follows according to mobility. Fixed RSs are permanently fixed and used to increase shadow area or cell coverage. This type can also be used as a simple repeater. The outdoor relay station (Nomadic RS) is a relay station that can be temporarily installed when the user suddenly increases or can be moved arbitrarily within a building. Mobile RS is a relay station that can be mounted on public transportation such as buses and subways.

1 and 2, a process of transmitting and receiving data through a relay station in a general communication system will be described. 1 is a structural diagram of a general communication system including a relay station, and FIG. 2 is a general frame structure diagram for data transmission and reception in the communication system shown in FIG.

In general, the communication system may include a base station 110, relay stations 121 to 123, and terminals 131 to 135, and between the base station 110, relay stations 121 to 123 and terminals 131 to 135. Data may be transmitted and received via uplink or downlink. In particular, a relay link between the base station 110 and the relay stations 121 to 123 through an access link between the base station 110 (or the relay stations 121 to 123) and the terminals 131 to 135. Data may be transmitted and received through.

The frame 200 shown in FIG. 2 may include a downlink region 210 and an uplink region 220. Here, the downlink region 210 includes a downlink relay region 211 and a downlink access region 212, and the uplink region 220 includes an uplink access ( uplink access region 221 and uplink relay region 222.

Here, the downlink relay area 211 is a subframe portion for transmitting data from the base station 210 to the relay stations 121 to 123, and the downlink access area 212 is the base station 210 (or a relay station). (121 to 123)} is a subframe part for transmitting data to the terminal. The uplink access area 221 is an area for transmitting data from the terminal to the base station 210 (or the relay stations 121 to 123), and the uplink relay area 222 is the relay station 121 to 123. Is a subframe part for transmitting data to the base station 110.

Hereinafter, a process of transmitting and receiving data based on the first relay station 121 will be described.

The first relay station 121 receives data to be transmitted from the base station 110 to the terminals 131 and 132 belonging to the first relay station 121 through the relay link in the downlink relay area 211. In this case, scheduling of downlink data may be performed by the base station 110.

The first relay station 121 transmits the received data to the terminals 131 and 132 belonging to the first relay station 121 in the downlink access area 212 through the access link. In this case, the scheduling of the downlink data may mean centralized scheduling by the base station 110 or distributed scheduling by the first relay station 121.

In this case, when the decoding-encoding data processing method is a predetermined relay station, the first relay station 121 may decode and encode the received data and transmit the decoded data to the terminals 131 and 132. Can be. Alternatively, when the Amplify scheme is a predetermined RS, the first RS 121 may amplify the received data and transmit the amplified data to the terminals 131 and 132.

In addition, in the uplink process, the first relay station 121 receives data from the terminal 131 or 132 through the access link in the uplink access area 221 and receives the data in the uplink relay area 222. The transmitted data may be transmitted to the base station 110 through the relay link.

In the following, it is assumed that a plurality of terminals communicate with a base station via a relay station. In this case, in communication between the relay station and the base station or between the relay station and another relay station, data for each of a plurality of terminals (for example, a predetermined map (MAP) or a medium access control protocol data unit (MAC PDU: Medium Access Control Protocol data) unit), hereinafter referred to as "MPDU", needs to be addressed.

In a typical broadband wireless access system, a connection identifier (CID) may be used for this purpose. The CID refers to an identifier uniquely assigned for each connection between the terminal and the base station. That is, the CID performs a function of identifying a specific terminal or identifying a specific service between the base station and the terminal. Such a CID may be included in a header of the MPDU, which will be described with reference to FIG. 3.

3 illustrates an example of a general media access control header (GMH: Generic MAC Header, hereinafter referred to as "GMH") form used in a wireless MAN mobile communication system based on a general IEEE 802.16 system.

Referring to FIG. 3, the GMH of the MPDU includes a 16-bit Connection Identifier (CID) field. Therefore, during communication between the relay station and the base station or between the relay station and the relay station, even if data for a plurality of terminals are simultaneously transmitted through one transmission unit, the relay station or base station serving as the receiving end may receive an MPDU (or map) to any terminal through the CID. I can tell whether

However, in the IEEE 802.16m system, an addressing method using a station ID (STID: Station ID) is used instead of addressing through CID. That is, in the IEEE 802.16m system, one unique STID is assigned to the terminal, and additional connection information is indicated through a flow ID. As a result, the GMH of the IEEE 802.16m system does not include a CID field unlike the header structure described above with reference to FIG. 3. This will be described with reference to FIG. 4.

4 illustrates an example of a general media access control header form that can be used in a general IEEE 802.16m system.

As shown, the GMH of FIG. 4 includes a 4-bit long flow identifier field and does not include a CID field. The STID for identifying the terminal is also not included in the GMH, and is masked in a map (MAP) or data cyclic redundancy check (CRC) and implicitly delivered.

Therefore, in the IEEE 802.16m system, when data for a plurality of terminals are simultaneously transmitted through one transmission unit during communication between the relay station and the base station or between the relay station and the relay station, the relay station or base station serving as the receiving end may have an MPDU (or map). It is unknown to which terminal.

The present invention has been made to solve the problems of the general technology as described above, an object of the present invention is to provide a data transmission method through a more efficient relay.

Another object of the present invention is to provide a data transmission method by which a base station or a relay station can distinguish data for each of a plurality of terminals.

Technical problems to be achieved in the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

In order to achieve the above technical problem, a method for transmitting data at a transmitting end of a broadband wireless communication system including at least one relay station according to an embodiment of the present invention, a medium access control protocol data unit (MAC) for each of a plurality of terminals; PDU) and including mapping information indicating a MAC PDU for each of the plurality of terminals and a correspondence relationship between the plurality of terminals in a relay station MAC PDU and transmitting the relay station MAC PDU to a receiving end.

In this case, the mapping information may be included in the RS MAC PDU in the form of a first extension header.

The mapping information may include the number of the plurality of terminals and at least a portion of a station ID of each of the plurality of terminals.

The mapping information may be a bitmap in which station identifiers of each of the plurality of terminals are mapped according to a rule preset in the transmitting end and the receiving end.

In addition, each bit of the bitmap may be set to '1' when the MAC PDU for the UE mapped to the bit is included in the RS MAC PDU.

In addition, the MAC PDU for each of the plurality of terminals may be included in the RS MAC PDU in the form of one or more MPDU bundles in the payload of the RS MAC PDU.

In addition, the RS MAC PDU may further include a relay station data including a message for the one or more relay stations and a second extension header including information on the relay station data.

The RS MAC PDU may further include a multiplexing header capable of accommodating a plurality of flow identifiers, and the first extension header and the second extension header may have different flow identifiers.

In addition, the second extended header may include a length field indicating the size of the relay station data.

In order to achieve the above technical problem, a method of transmitting data at a transmitting end of a broadband wireless communication system including at least one relay station according to another embodiment of the present invention, a medium access control protocol data unit (MAC) for each of a plurality of terminals; Transmitting a relay station MAC PDU including a PDU) and mapping information indicating a correspondence relationship between the plurality of terminals to a receiving end, and concatenating with the relay station MAC PDU to receive MAC PDUs for each of the plurality of terminals. And transmitting to the.

In this case, the mapping information may be included in the RS MAC PDU in the form of a first extension header.

In addition, the mapping information may include the number of the plurality of terminals and at least a part of a station ID of each of the plurality of terminals.

The mapping information may be a bitmap in which station identifiers of each of the plurality of terminals are mapped according to a rule preset in the transmitting end and the receiving end.

In the above embodiments, the transmitting end may be a base station, and the receiving end may be a relay station.

In the above embodiments, the transmitting end may be a relay station, and the receiving end may be a base station.

In the above embodiments, the transmitting end may be a first relay station, and the receiving end may be a second relay station.

According to the embodiments of the present invention, the following effects are obtained.

First, it is possible to communicate through the relay station more efficiently by using the header structure provided in the embodiments of the present invention.

Second, since the data for each of the plurality of terminals passing through the relay station can be distinguished by using the header structure provided in the embodiments of the present invention, more efficient data transmission through the relay station is possible.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

The present invention discloses an efficient data transmission method through a relay station in a wireless communication system.

The following embodiments are a combination of elements and features of the present invention in a predetermined form. Each component or feature may be considered to be optional unless otherwise stated. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, some of the elements and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments.

In the description of the drawings, procedures or steps which may obscure the gist of the present invention are not described, and procedures or steps that can be understood by those skilled in the art are not described.

In the present specification, embodiments of the present invention have been described based on data transmission / reception relations between a base station and a terminal. Here, the base station has a meaning as a terminal node of a network that directly communicates with the terminal. The specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.

That is, various operations performed for communication with a terminal in a network consisting of a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station. In this case, the 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), and an access point. In addition, the term 'mobile station' may be replaced with terms such as a user equipment (UE), a subscriber station (SS), a mobile subscriber station (MSS), a mobile terminal, or a terminal. .

Also, the transmitting end refers to a fixed and / or mobile node providing data service or voice service, and the receiving end means a fixed and / or mobile node receiving data service or voice service. Therefore, in uplink, a terminal may be a transmitting end and a base station may be a receiving end. Similarly, in downlink, a terminal may be a receiving end and a base station may be a transmitting end.

Meanwhile, the terminal of the present invention includes a PDA (Personal Digital Assistant), a cellular phone, a PCS (Personal Communication Service) phone, a GSM (Global System for Mobile) phone, a WCDMA (Wideband CDMA) phone, a MBS (Mobile Broadband System) phone, and the like. Can be used. In addition, the terminal may be a personal digital assistant (PDA), a hand-held PC, a notebook PC, a smart phone, a multi-mode multi-band (MM-MB) terminal. And so on.

 Here, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and may mean a terminal incorporating data communication functions such as schedule management, fax transmission and reception, which are functions of a personal mobile terminal, in a mobile communication terminal. have. In addition, a multimode multiband terminal can be equipped with a multi-modem chip to operate in both portable Internet systems and other mobile communication systems (eg, Code Division Multiple Access (CDMA) 2000 systems, wideband CDMA (WCDMA) systems, etc.). Speak the terminal.

Embodiments of the invention may be implemented through various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.

In the case of a hardware implementation, the method according to embodiments of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs). It may be implemented by field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of an implementation by firmware or software, the method according to the embodiments of the present invention may be implemented in the form of a module, a procedure, or a function that performs the functions or operations described above. The software code may be stored in a memory unit and driven by a processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document. In particular, embodiments of the present invention may be supported by one or more of the standard documents P802.16-2004, P802.16e-2005, and P802.16Rev2 documents of the IEEE 802.16 system.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

In addition, specific terms used in the embodiments of the present invention are provided to help the understanding of the present invention, and the use of the specific terms may be changed to other forms without departing from the technical spirit of the present invention.

In general, the link layer (ie, link layer or MAC layer) and physical layer (Physical layer) below the second layer are protocols according to respective systems such as LAN, Wireless LAN, 3GPP / 3GPP2, or Wireless MAN and corresponding MAC PDUs (MPDUs). Header format is defined differently. The MAC header includes a node MAC address or link address for data transfer between nodes in the link layer, and may include header error check and link layer control information.

FIG. 5 is a diagram illustrating an example of a MAC PDU (MAC Protocol Data Unit) form defined in a wireless MAN mobile communication system based on the IEEE 802.16 system.

5, each MAC PDU starts with a MAC header of a certain length. The header is located before the payload of the MAC PDU. The payload of the MAC PDU may include a subheader, a MAC SDU, and a fragment. The length of payload information may be changed to represent a variable byte quantity. Accordingly, the MAC sublayer may transmit various traffic types of the upper layer without recognizing the format or bit pattern of the message. In addition, the MAC PDU may include a cyclic redundancy check (CRC) for error detection. CRC function may be implemented in the physical layer of the OFDMA system.

Hereinafter, in this specification, a terminal (Advanced MS) to which an advanced technology is applied, including the IEEE 802.16m standard, is referred to as "AMS". In addition, it is assumed that the relay station may go through one or more other relay stations in order to transmit and receive data with the base station or the terminal. In addition, when the base station and the relay station supports both the general terminal and the AMS, it is assumed that the base station and relay station has both a region having a physical channel frame structure applied to the general system and a region having a physical channel frame structure applied to the new system. do. In this case, in the physical channel frame structure, an area for a general system and an area for an advanced system may be divided into time units, for example, frames or subframes (TDD) in uplink and downlink, respectively. have. The MPDU used for data transmission between the base station and the relay station or between the relay station and another relay station is referred to as "RS MPDU" in the present invention.

6 illustrates MPDUs for each of a plurality of terminals in communication between a relay station and a base station or between a relay station and another relay station according to embodiments of the present invention.

In some cases, MPDUs for a plurality of AMSs as shown in FIG. 6 must be simultaneously transmitted through a relay station in one transmission unit time (for example, transmission time interval (TTI)). Here, through the relay station means a case where at least one of the transmitting end and the receiving end is the relay station.

In this case, the present invention provides a data transmission method capable of distinguishing a terminal (AMS) for each MPDU at the receiving end.

1. for multiple terminals MAC PDU Data of relay station to hear With payload  How to deal.

According to an embodiment of the present invention, there is provided a method of forming and transmitting a payload of one MPDU by making MPDU bundles for a plurality of terminals (AMS) into MPDU bundles.

1.1 MPDU  One per bundle Flow  When using identifier

FIG. 7 illustrates an example of MPDUs including MPDUs for each of a plurality of terminals according to an embodiment of the present invention in one payload using one flow identifier.

Referring to FIG. 7, MPDUs for a plurality of terminals (AMS) are combined into MPDU bundles to form a payload for one new MPDU together with an extended header and RS data. Can be. Here, some of contents included in the payload may be omitted as necessary.

In this case, RS data generally indicates a message for a relay station exchanged between a base station and a relay station or between a relay station and another relay station, and may further include terminal information on MPDUs included in an MPDU bundle.

A method of indicating AMS information about MPDUs included in an MPDU bundle. 1) A method of enumerating at least a part of a station identifier (STID: STID) of an AMS, or 2) A station identifier of an AMS. A method of using a bitmap mapped to may be used. The two methods are described in more detail below.

The first method is to enumerate all or part of the STID of the AMS.

This scheme may indicate the AMS information using, for example, the number of AMSs for the MPDUs included in the MPDU bundle and at least a portion (ie, part or all) of the STID. At this time, it is preferable that the length of the STID of each AMS is included in the transmitter and the receiver in advance.

The second method is to use a bitmap that replaces the STID of AMS.

In this scheme, for example, for 10 AMSs, a base station and a relay station, or a relay station and another relay station share in advance the STID of each AMS and a position on the corresponding bitmap, and actual signaling is performed only as a bitmap. You can do that. That is, if the bit for the corresponding AMS of the bitmap is '0', it may indicate that there is no data (MPDU or MAP) for the corresponding AMS. If the bit is '1', it may indicate that there is data for the corresponding AMS.

The AMS information (hereinafter referred to as "AMS information") for each of the plurality of MPDUs as described above may be included in the RS MPDU in the form of an extended header. In this case, an extended header type for transmitting AMS information may be newly defined.

If the relay station data is included in the RS MPDU, since the relay station data should be distinguished from the MPDU bundle, an extended header including information on the relay station data may be additionally set and included in the RS MPDU. In this case, the extended header for the relay station data, and the extended header for the MPDU bundle may be located. However, this is merely exemplary and the order may be changed.

On the other hand, the receiver has a specific value that is differently set according to whether the GMH flow identifier includes the relay station data, the MPDU bundle, and the MPDU bundle for the upper / lower relay station / base station. You can tell. Additional quality of information (QoS) information may be added to at least one of the above-described extension headers.

In addition, since the length field in the GMH represents the length obtained by adding the relay station data and the MPDU bundles, the length of the MPDU may be indicated by including information about the length of the relay station data in the extension header for the relay station data. . Alternatively, the MPDU bundle may be placed ahead of the relay station data in the RS MPDU to implicitly allow the receiving end to know the RS data length of the relay station data.

In addition, different MPDU bundles may be configured for MPDUs of AMSs that pass through a relay station of a higher layer or a lower layer according to a layer of each relay station according to an RS hierarchy.

1.2 MPDU  Multiple against a bundle Flow  When using identifier

Unlike the case of FIG. 7, the RS MPDU may be configured using a plurality of flow IDs. In this case, a multiplexing header that can accommodate a plurality of flow identifiers is used. This will be described with reference to FIG. 8.

8 illustrates another example of an MPDU including MPDUs for each of a plurality of terminals according to an embodiment of the present invention in one payload.

Referring to FIG. 8, a flow identifier (FID # 1) for relay station data and a flow identifier (FID # 2 to #n) for MPDU bundle may be set. In this case, the RS MPDU may include one or more MPDU bundles including one or more MPDUs, and different flow identifiers may be set for each MPDU bundle. Conversely, only one flow identifier may be set for a plurality of MPDU bundles.

As the AMS information for the MPDU bundle, as described above in 1.1, 1) a method of enumerating at least a part of the STID of the AMS, or 2) a method of using a bitmap mapped with a station identifier of the AMS can be used. In addition, the above-described AMS information may be used methods using an extension header. In addition, the AMS information may be included in the RS MPDU in the form of an extended header. In this case, one extension header may be used for each flow identifier for the MPDU bundle, and one extension header may be used for the entire MPDU bundle included in the RS MPDU.

2. A method of concatenating and processing MAC PDUs for a plurality of UEs with an RS MPDU.

According to another embodiment of the present invention, a method for concatenating and transmitting MPDUs for each of a plurality of terminals (AMS) to a general RS MPDU is provided. This will be described with reference to FIG. 9.

9 shows an example of a form in which MPDUs for each of a plurality of terminals associated with another embodiment of the present invention are connected to an RS MPDU.

Referring to FIG. 9, MPDUs for each of the plurality of AMSs may be transmitted by simply concatenating with the RS MPDUs. In this case, as the AMS information about the MPDU connected to the RS MPDU, 1) a method of enumerating at least a part of the STID of the AMS, or 2) a method of using a bitmap mapped with the STID of the AMS may be used. Detailed descriptions of the two methods are similar to those described above in an exemplary embodiment, and thus redundant descriptions thereof will be omitted. Such AMS information may be included in the form of an extended header of the RS MPDU, or may be included in the form of data in the payload of the RS MPDU.

In addition, the flow identifier of the GMH of the RS MPDU may have a predetermined specific value depending on whether concatenation is performed so that the receiving end may know whether the MPDUs are connected after the RS MPDU.

In another embodiment of the present invention, a relay station specific header other than the general GMH may be used for the RS MPDU structure applied in the above embodiments. If such a relay station specific header is used, implicit indication of the included MPDU is possible by CRC masking with the relay station's station STID and transmitting to the receiver without additional indication bits.

 As an example of a relay specific header, some (n) bits of four bits of a flow ID field in a general GMH may be included in a length field of 11 bits. In this case, the length field has a size of 11 + n bits and represents a larger payload length.

As another example of the relay station specific header, one bit of the flow identifier 4 bits and the extended header (EH) field may be added, and m bits may be additionally included in the GMH so that the length field has a size of 11 + m bits. If the value of m is less than 8, then (8-m) bits can simply be reserved for byte alignment and used for other purposes.

As another embodiment of the present invention, a terminal and a base station (FBS, MBS) in which embodiments of the present invention can be performed are described.

The terminal may operate as a transmitting device in uplink and as a receiving device in downlink. In addition, the base station may operate as a receiving device in the uplink, and may operate as a transmitting device in the downlink. That is, the terminal and the base station may include a transmitting device and a receiving device for transmitting information or data.

The transmitting device and the receiving device may include a processor, a module, a part and / or a means for performing the embodiments of the present invention. In particular, the transmitting device and the receiving device may include a module (means) for encrypting a message, a module for interpreting an encrypted message, an antenna for transmitting and receiving a message, and the like.

The terminal used in the embodiments of the present invention may include a low power RF (Radio Frequency) / IF (Intermediate Frequency) module in addition to the MAC PDU generation unit described above. In addition, the terminal is a controller function, a MAC (Medium Access Control) frame variable control function, a handover function, authentication and encryption function, data according to the controller function, service characteristics and propagation environment for performing the above-described embodiments of the present invention. Means, modules or parts for performing packet modulation and demodulation, high speed packet channel coding, and real-time modem control for transmission.

The base station may transmit data received from the upper layer to the terminal by wireless or wired. The base station may include a low power radio frequency (RF) / intermediate frequency (IF) module. In addition, the base station is a controller function for performing the above-described embodiments of the present invention, orthogonal frequency division multiple access (OFDMA) packet scheduling, time division duplex (TDD) packet scheduling and channel multiplexing function MAC frame variable control function according to service characteristics and propagation environment, high speed traffic real time control function, hand over function, authentication and encryption function, packet modulation and demodulation function for data transmission, high speed packet channel coding function and real time modem control Means, modules or parts for performing functions and the like.

The invention can be embodied in other specific forms without departing from the spirit and essential features of the invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention. In addition, the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship or may be incorporated as new claims by post-application correction.

1 shows an example of a general communication system including a relay station.

FIG. 2 shows a general frame structure for data transmission and reception in the communication system shown in FIG.

3 illustrates an example of a general medium access control header structure used in a wireless MAN mobile communication system based on a general IEEE 802.16 system.

4 illustrates an example of a general media access control header form that can be used in a general IEEE 802.16m system.

FIG. 5 is a diagram illustrating an example of a MAC PDU (MAC Protocol Data Unit) form defined in a wireless MAN mobile communication system based on the IEEE 802.16 system.

6 illustrates MPDUs for each of a plurality of terminals in communication between a relay station and a base station or between a relay station and another relay station according to embodiments of the present invention.

7 illustrates an example of an MPDU including MPDUs for each of a plurality of terminals according to an embodiment of the present invention in one payload.

8 illustrates another example of an MPDU including MPDUs for each of a plurality of terminals according to an embodiment of the present invention in one payload.

9 shows an example of a form in which MPDUs for each of a plurality of terminals associated with another embodiment of the present invention are connected to an RS MPDU.

Claims (16)

A method for transmitting data at a transmitting end of a broadband wireless communication system including at least one relay station, Including in the relay station MAC PDU, a medium access control protocol data unit (MAC PDU) for each of a plurality of terminals and mapping information indicating a correspondence of the plurality of terminals of the MAC PDU for each of the plurality of terminals; And Transmitting the RS MAC PDU to a receiving end. The method of claim 1, The mapping information, And in the RS MAC PDU in the form of a first extension header. 3. The method of claim 2, The mapping information, And a number of the plurality of terminals and at least a part of a station ID of each of the plurality of terminals. 3. The method of claim 2, The mapping information, And a station map of each of the plurality of terminals is a bitmap mapped according to a rule preset to the transmitting end and the receiving end. The method of claim 4, wherein Each bit of the bitmap, If the MAC PDU for the terminal mapped to the corresponding bit is included in the RS MAC PDU, the data transmission method characterized in that the set to '1'. 3. The method of claim 2, MAC PDU for each of the plurality of terminals, And in the relay station MAC PDU in the form of one or more MPDU bundles within the payload of the relay station MAC PDU. The method of claim 6, The relay station MAC PDU further includes a second extension header including relay station data including a message for the one or more relay stations and information on the relay station data. The method of claim 7, wherein The relay station MAC PDU, Further comprising a multiplexing header (Multiplexing header) that can accommodate a plurality of flow identifiers, And the first extended header and the second extended header have different flow identifiers. The method of claim 7, wherein The second extension header, And a length field indicating the size of the relay station data. A method for transmitting data at a transmitting end of a broadband wireless communication system including at least one relay station, Transmitting, to the receiving end, a relay station MAC PDU including mapping information indicating a correspondence of the plurality of terminals of a medium access control protocol data unit (MAC PDU) for each of the plurality of terminals; And And concatenating with the relay station MAC PDU to transmit MAC PDUs for each of the plurality of terminals to the receiving end. The method of claim 10, The mapping information, And in the RS MAC PDU in the form of a first extension header. The method of claim 11, The mapping information, And a number of the plurality of terminals and at least a part of a station ID of each of the plurality of terminals. The method of claim 11, The mapping information, And a station map of each of the plurality of terminals is a bitmap mapped according to a rule preset to the transmitting end and the receiving end. The method according to claim 1 or 10, The transmitting end is a base station, And the receiving end is a relay station. The method according to claim 1 or 10, The transmitting end is a relay station, The receiving end is a data transmission method, characterized in that the base station. The method according to claim 1 or 10, The transmitting end is a first relay station, And the receiving end is a second relay station.

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