KR20090115046A - Method for managing data in relay station - Google Patents

Abstract

PURPOSE: A data process method of a repeater capable of selectively operating a data process method in the repeater is provided to process the data by selectively using a amplification method in the repeater. CONSTITUTION: An identification value is received(S510). The identification value indicates data process method from a base station. The data are received from the base station(S520). The received data is processed in a data process method of a decoding-encoding method and an amplification method(S540). The processed data is transmitted from the terminal(S560).

Description

Method for managing data in relay station

The present invention relates to a data processing method of a repeater in a communication system, and more particularly, to a method of processing data using a decoding-encoding method and an amplify method.

1 and 2, a data transmission and reception process in a general communication system will be described. 1 is a structural diagram of a general communication system, Figure 2 is a general frame structure for data transmission and reception in the communication system shown in FIG.

In general, the communication system may include a base station 110, repeaters 121 to 123, and terminals 131 to 135, and between the base station 110, repeaters 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 repeaters 121 to 123 through an access link between the base station 110 (or the repeaters 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 relays 121 to 123, and the downlink access area 212 is the base station 210 (or repeater). (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 relays 121 to 123), and the uplink relay area 222 is the relays 121 to 123. Is a subframe part for transmitting data to the base station 110.

Hereinafter, the data transmission and reception process will be described based on the first repeater 121.

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

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

In this case, the first repeater 121 may decode and encode the received data and transmit the decoded-encoded data to the terminals 131 and 132 when the decoding-encoding method is a predetermined repeater. have. Alternatively, when the amplify method is a predetermined repeater, the first repeater 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 repeater 121 receives data from the terminal 131 or 132 through the access link in the uplink access region 221, and receives the data in the uplink relay region 222. The transmitted data may be transmitted to the base station 110 through the relay link.

In particular, according to a hybrid automatic repeat request (HARQ) scheme, the relay link between the base station 110 and the first repeater 121 and the access between the first repeater 121 and the terminal 131 or 132. Links may operate independently and sequentially.

According to the conventional method described above, the repeater must process the data received from the base station or the terminal by using a data processing method that is previously assigned to the repeater. Therefore, even if the received data is data suitable for a data processing method other than the predetermined data processing method, it is cumbersome to use the predetermined data processing method.

Therefore, the necessity of selectively operating a plurality of data processing methods in consideration of data characteristics in one repeater has emerged.

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 processing method of a repeater capable of selectively operating a data processing method in one repeater.

Another object of the present invention is to provide a data processing method of a repeater capable of determining a data processing method according to an identification value designating a data processing method received from a base station.

In addition, another object of the present invention is to provide a data processing method of a repeater capable of determining a data processing method according to the repeater identification information received from the base station.

In order to achieve the above object, the data processing method of the repeater according to the present invention comprises the steps of: receiving an identification value indicating a data processing method from the base station; Receiving data from the base station; Processing the received data in any one of a decoding-encoding scheme and an amplify scheme according to the received identification value; And transmitting the processed data to the terminal.

The identification value may be set to any one of a plurality of codes including a first code and a second code, and the amplification is performed when the decoding-encoding scheme is the second code. Can direct the way.

In addition, in order to achieve the above object, a data processing method of a repeater according to the present invention, receiving any one of the repeater identification information of the plurality of repeater identification information set in one repeater from the base station; Receiving data from the base station; Processing the received data in one of a data processing scheme of a decoding-encoding scheme and an amplification scheme according to the received repeater identification information; And transmitting the processed data to the terminal.

Here, in the processing step, when the received repeater identification information is the first repeater identification information, the received data is processed in the decoding-encoding scheme, and the received repeater identification information is the second repeater identification information. The received data may be processed by the amplification scheme.

As described above, the effects of the repeater data processing method according to the present invention are as follows.

First, data may be processed using a decoding-encoding scheme and an amplification scheme selectively in one repeater.

Second, since the data processing method specified according to the data type is performed, transmission speed can be guaranteed for real time data and data transmission efficiency can be improved for non real time data.

The following embodiments combine the components 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 embodied in a form that is not combined with other components or features. In addition, some components 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 components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.

In the present specification, embodiments of the present invention have been described based on a data transmission / reception relationship between a base station, a repeater, or a terminal. Here, the base station has a meaning as a terminal node of a network that directly communicates with a terminal or a repeater. Of course, certain operations described herein as being performed by a base station may be performed by an upper node of the base station in some cases.

That is, it is obvious that various operations performed for communication with a terminal in a network composed 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. 'Base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like. In addition, the term "terminal" may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and the like.

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). 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.

Specific terms used in the following description are provided to help the understanding of the present invention, and the use of the specific terms may be modified in other forms without departing from the technical spirit of the present invention.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the process of describing the embodiments of the present invention, some procedures basically used to prevent waste of unnecessary ground or obscure the subject matter of the present invention will be omitted and described.

For convenience of description, it may be assumed that the base station, the repeater, and the terminal mentioned below refer to the base station 110, the first repeater 121, and the terminal 131 included in the communication system illustrated in FIG. 1. .

Prior to the detailed description of the data processing method of the repeater according to the present invention, a frame structure suitable for the present invention will be described with reference to FIGS. 3 and 4.

In particular, FIG. 3 illustrates a case where at least two frames are required from the base station 110 to the terminal 131, and FIG. 4 illustrates a case where at least one frame is required from the base station 110 to the terminal 131.

As shown in FIG. 3, the repeater 121 may transmit data 311-1 to be transmitted to the terminal 131 in the downlink relay region 311 of the Nth frame (hereinafter referred to as 'frame N') 310. After receiving from the base station 110, the ACK / NACK message 312-1 for the data 311-1 received from the base station 110 is transmitted in the uplink relay area 312 of the frame N 310. 110).

In addition, the repeater 121 receives the data 321-1 received from the base station 110 in the downlink access area 321 of the N + 1 th frame (hereinafter referred to as 'frame N + 1') 320. 131 and then receive an ACK / NACK message 322-1 for the transmitted data 321-1 from the terminal 131 in the uplink access area 322 of frame N + 1 320. can do.

At this time, the repeater 121 may transmit the data 311-1 received from the base station 110 within the frame N 310 period by the decoding-encoding method or the amplification method, and then transmit the same to the terminal 131. (Details thereof will be described later).

As described above, in FIG. 3, it can be seen that at least two frames are required to complete the data transmission process from the base station 110 to the terminal 131.

As shown in FIG. 4, the repeater 121 receives data 411-1 to be transmitted to the terminal 131 from the base station 110 in the downlink relay region 411 of the frame N 410, and The received data 412-1 is sequentially transmitted from the downlink access area 412 of the frame N 410 to the terminal 131, and the ACK / NACK of the received data 412-1 is sequentially transmitted. The message 413-1 is received from the terminal 131 in the uplink access area 413 of the frame N 410, and the received ACK / NACK message 414-1 is sequentially sent to the base station 110 as it is. I can send it.

At this time, the repeater 121 processes the data 411-1 received from the base station 110 within the downlink subframes 411 and 412 of the frame N 410 by a decoding-encoding method or an amplification method. After that, it may be transmitted to the terminal 131 (a detailed description thereof will be described later).

5 is a flowchart of a data processing method of a repeater according to an embodiment of the present invention.

As illustrated in FIG. 5, the repeater 121 receives an identification value indicating a data processing method from the base station 110 (S510).

In the reception step S510, the repeater 121 may receive an identification value indicating a data processing scheme in the downlink relay region 311 or 411 of the frame N 310 or 410.

At this time, the identification value is included in the downlink map message 311-2 or 411-2 provided from the base station 110 to the relay 121 through the downlink relay area 311 or 411. Can be provided. Here, the downlink map message 311-2 or 411-2 includes control of the downlink including location information of each data burst that the base station 110 intends to substantially provide to the terminal 131. May contain information.

Alternatively, when the present invention is applied to a communication system by 3GPP, the identification value may be provided through a physical downlink control channel (PDCCH). Here, the physical downlink control channel may mean a channel that provides control information for data downlinked from the base station 110 to the terminal 131.

The identification value received in the reception step S510 may be set to any one code among a plurality of codes including a first code and a second code. At this time, the code of the identification value may be set by the base station (110).

For example, the identification value may indicate, as a data processing scheme, a decoding-encoding scheme in the case of the first code and an amplification scheme in the case of the second code.

Preferably, the data processed by the decoding-encoding scheme indicated by the first code may be packet data, and the data processed by the amplification scheme indicated by the second code is real time data (real). -time data). This is because the amplification method is suitable for the real-time data because the guarantee of the data transmission rate is important, and the decoding-encoding method is suitable because the noise removal is important even if the data transmission rate is not guaranteed for the packet data.

The repeater 121 receives data (or a data burst) from the base station 110 (S520).

In the reception step S520, the repeater 121 may receive data 311-1 or 411-1 through the downlink relay region 311 or 411 of the frame N 310 or 410.

The data received in the reception step S520 may be data that the base station 110 substantially intends to provide to the terminal 131.

The repeater 121 determines whether the identification value received in the reception step S510 is the first code or the second code (S530).

If the determination result is the first code, the repeater 121 processes the data received in the reception step S520 in a decoding-encoding manner (S540).

For example, when processing data in a decoding-encoding scheme, at least two frames may be needed as shown in FIG. 3 to secure time for decoding and encoding data. In this case, the repeater 121 may decode and encode data to be transmitted before transmitting data from the downlink access area 321 of the frame N + 1 320 to the terminal 131.

Alternatively, when the determination result is the second code, the repeater 121 processes the data received in the receiving step (S520) by an amplification method (S550).

For example, in the case of the amplification method, since it takes less time for data processing, one frame may be required as shown in FIG. 4.

The repeater 121 then transmits the data processed in the processing step S540 or S550 to the terminal 131 (S560).

In the transmitting step (S560), the repeater 121 is sent to the terminal 131 through the downlink access area 321 of the frame N + 1 (320) or the downlink access area 412 of the frame N (410). Data can be sent.

For example, the data 321-1 processed by the decoding-encoding scheme is transmitted through the downlink access area 321 of the frame N + 1 320, and the data 412-processed by the amplification scheme. 1) may be transmitted over the downlink access area 412 of frame N 410.

6 is a flowchart of a data processing method of a repeater according to another embodiment of the present invention.

As illustrated in FIG. 6, the repeater 121 receives one of the plurality of repeater identification information set in one repeater 121 from the base station 110 (S610).

Here, it is assumed that a plurality of repeater identification information is set in the repeater 121 before the reception step S610.

In the reception step S610, the repeater 121 may receive the relay identification information in the downlink relay region 311 or 411 of the frame N 310 or 410.

For example, the relay identification information may be provided by a downlink map message 311-2 or 411-2 provided from the base station 110 to the relay 121 through the downlink relay area 311 or 411. It may be included in the). Alternatively, when the present invention is applied to a communication system by 3GPP, the relay identification information may be provided through a physical downlink control channel (PDCCH).

In addition, the relay identification information may have the same structure as the base station identification information or the terminal identification information.

In addition, the repeater 121 receives the second repeater identification information when the first relay identification information is real time data when the data received in the reception step S620 to be described later is packet data (an example of non-real time data). can do. In this case, designation of the repeater identification information according to the data type may be performed by the base station 110.

For example, the downlink control signal including the first or second relay identification information (first RS ID or second RS ID) may have a structure shown in Table 1 or Table 2.

TABLE 1

DL control signal Format RS ID ( first RS ID or Second RS ID ) Numbers of MSs For (i = 1; i = <Number of MSs; i ++) {MS ID (e.g. CID or C-RNTI) MCS (e.g. DIUC) Information about time-frequency resource mapping (e.g. OFDMA symbol offset and sub-channel offset)}

TABLE 2

DL control signal Format RS ID ( first RS ID or Second RS ID ) MS ID (eg CID or C-RNTI) MCS (eg DIUC) Information about time-frequency resource mapping (eg OFDMA symbol offset and sub-channel offset)

Here, the downlink control signal may be provided through a downlink map message or a PDCCH provided for downlink resource allocation from the base station 110 to the relay 121 through the relay link.

The repeater 121 receives data (or a data burst) from the base station 110 (S620).

In the receiving step (S620), the repeater 121, through the downlink relay area 311 or 411 of the frame N (310 or 410), the base station 110 substantially to provide the data (the terminal 131) ( 311-1 or 411-1).

The repeater 121 determines whether the repeater identification information received in the receiving step S610 is the first repeater identification information or the second repeater identification information (S630).

If the determination result is the first repeater identification information, the repeater 121 processes the data received in the reception step S620 in a decoding-encoding manner (S640).

Or, if the determination result is the second repeater identification information, the repeater 121 processes the data received in the receiving step (S620) in an amplification manner (S650).

Here, the data processed in the decoding-encoding scheme may be packet data, and the data processed in the amplification scheme may be real-time data.

Since the processing steps S640 and S650 are the same as the processing steps S540 and S550 of FIG. 5, detailed description thereof will be omitted below.

The repeater 121 then transmits the data processed in the processing step S640 or S650 to the terminal 131 (S660).

Since the transmission step S660 is the same as the transmission step S560 of FIG. 5, a detailed description thereof will be omitted.

As described above, the repeater 121 may check the data reception error through data decoding after transmitting the data processed by the amplification method (S550 or S650) to the terminal 131.

For example, a case of confirming a data reception error will be described below. The repeater 121 may determine whether the reception is successful after decoding the data transmitted to the terminal 131. The repeater 121 may retransmit the decoded data to the terminal 131 according to whether ACK / NACK is received from the terminal 131 when the confirmation result data is successfully received. Regardless of whether ACK / NACK is received from 131, the base station 110 may transmit a NACK message to request data retransmission.

Next, a case where the data reception error is not confirmed will be described. Since the HARQ process is substantially formed between the base station 110 and the terminal 131, the repeater 121 transfers the received NACK message to the base station as it is and receives a NACK message from the terminal 131 to request data retransmission. Can be.

Terms used herein may be replaced with other terms generally used in the communication field. For example, the terminal is a generic term for electronic devices capable of wireless communication with the base station, and may be replaced with terms such as a mobile station, a mobile terminal, or a user equipment (UE). Also, a base station is a device that serves to provide a specific service to a terminal through wireless communication with the terminal at the end of the network, and may be replaced with a term such as a fixed station.

 The above-described messages and parameters are merely illustrative examples that can be used in one embodiment according to the present invention, and other types of messages and parameters may be used for the same purpose as the present invention. In addition, it will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the above detailed description should not be construed as limiting in all aspects, but should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

1 is a structural diagram of a general communication system.

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

3 and 4 are frame structure diagrams according to an embodiment of the present invention.

5 and 6 are flowcharts of a data processing method of a repeater according to an embodiment of the present invention.

Claims (9)

Receiving an identification value indicating a data processing scheme from a base station; Receiving data from the base station; Processing the received data in any one of a decoding-encoding scheme and an amplify scheme according to the received identification value; And And transmitting the processed data to a terminal. The method of claim 1, wherein the identification value, Data processing of a repeater that can be set to any one of a plurality of codes including a first code and a second code, and instructs the decoding-encoding scheme in the case of the first code and the amplification scheme in the case of the second code. Way. The method of claim 2, The data processed by the decoding-encoding scheme is Packet data, The data processed by the amplification method, Data processing method of repeater which is real time data. The method of claim 1, wherein the identification value, A method for processing data of a repeater received through one of a downlink map (DL-MAP) message and a physical downlink control channel. Receiving one of the plurality of repeater identification information set in one repeater identification information from the base station; Receiving data from the base station; Processing the received data in one of a data processing scheme of a decoding-encoding scheme and an amplification scheme according to the received repeater identification information; And And transmitting the processed data to a terminal. The method of claim 5, wherein the processing step, Processing the received data by the decoding-encoding scheme when the received repeater identification information is first repeater identification information, And processing the received data by the amplification method when the received repeater identification information is second repeater identification information. The method of claim 6, The data processed by the decoding-encoding scheme is Packet data, The data processed by the amplification method, Data processing method of repeater which is real time data. The method of claim 5, wherein the repeater identification information, A method for processing data of a repeater received through one of a downlink map (DL-MAP) message and a physical downlink control channel. The method of claim 5, wherein the repeater identification information, A repeater data processing method having the same structure as any one of the base station identification information and the terminal identification information.

Images