KR100939707B1 - Apparatus and method for receiving data in a communication system - Google Patents

Abstract

According to an embodiment of the present invention, a burst of a plurality of packet data units concatenated is received, and the first packet data unit is transmitted to the first packet data unit through a header check sequence (HCS) of the first packet data unit in the burst. Confirm the decoding success, update the decoding count according to whether the first decoding succeeds, and if the first decoding fails, the second packet data through the header check sequence of the second packet data unit in the burst; A second decoding success for the unit is checked to decode the packet data unit.

Description

APPARATUS AND METHOD FOR RECEIVING DATA IN A COMMUNICATION SYSTEM

The present invention relates to a communication system, and more particularly, to a data receiving apparatus and method for normally decoding data in a wireless access communication system.

In the next generation communication system, active researches are being conducted to provide users with services of various quality of service (QoS: QoS) having high transmission speeds. In particular, research is being actively conducted to support high-speed services in the form of guaranteeing mobility and QoS in the BWA communication system.

In addition, data received in a standard for a broadband wireless access (BWA) communication system, that is, referred to as Media Access Control (MAC) Packet Data Unit (PDU) (hereinafter referred to as 'PDU') (hereinafter referred to as 'MAC PDU') at the layer, or Hybrid Automatic Repeat Request (HARQ: Hybrid Automatic) Repeat reQuest, hereinafter referred to as 'HARQ', has been proposed an error check scheme for checking whether a packet has been correctly decoded. The error check scheme is referred to as a header check sequence (HCS). And cyclic redundancy check (CRC) 32 and CRC16, respectively. In more detail, the method using the HCS is used to confirm whether the decoded MAC header information is correct, and the method using the CRC32 is used to confirm whether the MAC payload included in the MAC header is correct. In the method using the CRC16, when the MAC PDU is transmitted through the HARQ channel, the CRC16 is added to the end of the MAC PDU so that the HARQ subburst is correctly received at the physical layer (PHY: physical, hereinafter referred to as 'PHY'). It is used to check.

In addition, the MAC PDUs may be concatenated within one burst or HARQ burst, wherein if decoding of a MAC header including full PDU length information fails within one MAC PDU, then the receiver is connected to the next connected MAC. Decoding of PDUs always fails. In particular, in order to reduce the overhead of control information, such as MAP information elements (IE), in the WiMAX system, the concatenation of the MAC PDUs is performed. Although widely used, the decoding problem as described above degrades the performance of the system. Accordingly, there is a need for a specific scheme for reducing decoding failure rates for concatenated MAC PDUs.

Accordingly, an object of the present invention is to provide an apparatus and method for receiving data in a communication system.

Another object of the present invention is to provide an apparatus and method for receiving data by decoding a PDU in a communication system.

Another object of the present invention is to provide an apparatus and method for receiving data to increase decoding success rates of concatenation PDUs in a communication system.

In accordance with another aspect of the present invention, a method for receiving data in a receiver includes a burst in which a plurality of PDUs are concatenated, and a header check sequence (HCS) of a first PDU in the burst. Confirming the first decoding success for the first PDU, updating the decoding count according to the success of the first decoding, and checking the header of the second PDU in the burst when the first decoding fails. Confirming a second decoding success for the second PDU through a sequence and decoding the PDU.

According to another aspect of the present invention, there is provided a method of receiving data in a receiver, the method comprising: receiving a burst including a plurality of concatenated MAC PDUs, and a first for a first MAC PDU in the burst; Performing decoding, and performing a second decoding on a second MAC PDU by using length information in the first MAC PDU when the first decoding fails.

An apparatus of the present invention for achieving the above object, in the data receiving apparatus of the wireless communication system, the receiving apparatus comprises a receiver for receiving a burst (concatenation) of a plurality of PDUs, the receiver, Confirming the first decoding success for the first PDU through the header check sequence (HCS: Header Check Sequence) of the first PDU, the field of the header corresponding to the first PDU or the Cyclic Redundancy Check (CRC) in the burst The decoding count is updated according to whether the first decoding is successful, and when the first decoding fails, the header check sequence of the second PDU and the field or cyclic redundancy check of the header corresponding to the second PDU are performed in the burst. The second decoding success for the second PDU is confirmed by decoding the PDU.

The present invention can improve the reception efficiency of data by verifying success of decoding of concatenated PDUs in a communication system, respectively, to correctly decode not only one PDU but also the next PDU in the connected PDU. Therefore, the present invention can improve the performance of the system by not only reducing the overhead of control information but also improving the reception efficiency of data.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

The present invention relates to a data receiving apparatus and method in an IEEE 802.16 communication system, which is a communication system, for example, a broadband wireless access (BWA) communication system. Suggest. Here, in the embodiment of the present invention to be described later, orthogonal frequency division multiplexing (OFDM) / orthogonal frequency division multiplexing (OFDM) in the IEEE 802.16 communication system for convenience of description. Although an example of a communication system using an access (OFDMA: Orthogonal Frequency Division Multiple Access (OFDMA)) scheme is described as an example, the data receiving apparatus and method proposed by the present invention may be applied to other communication systems. .

In addition, in the present invention, a base station (BS: Base Station, hereinafter referred to as "BS") that manages a predetermined cell in a communication system exists in the predetermined cell and receives a service from the BS. Send and receive a packet data unit (PDU: Packet Data Unit, hereinafter referred to as PDU) corresponding to the service type to provide a service to the mobile station, hereinafter referred to as MS. (MAC: Media Access Control, hereinafter referred to as 'MAC') Data receiving apparatus and method for improving the decoding success rate for PDU (hereinafter referred to as 'MAC PDU') in the layer (layer) Suggest.

In an embodiment of the present invention to be described later, two or more MAC PDUs are reduced in order to reduce an overhead of control information including information corresponding to the MAC PDU, for example, location information, modulation, and coding information of the MAC PDU. When concatenated and transmitted by the BS or the transmitter of the MS, the receiver of the MS or BS receives data by increasing the decoding success rate of the concatenated MAC PDUs. That is, the present invention receives data by correctly decoding not only one MAC PDU, for example, the MAC PDU located at the head of the connected MAC PDUs, but also the next MAC PDU. In particular, the present invention decodes the next MAC PDU to receive data even if one MAC PDU is not correctly decoded in one MAC PDU in the connected MAC PDUs.

Further, in an embodiment of the present invention, a header check sequence (HCS: Header Check Sequence, hereinafter referred to as 'HCS') included in a MAC header of a MAC PDU, or a field of the MAC header, for example, HT The MAC PDU is normally decoded by checking whether the MAC PDU is successfully decoded by using a field, an EC field, or a cyclic redundancy check (CRC: Cyclic Redundancy Check). Check if it is a PDU. In this case, the receiver according to the embodiment of the present invention, one MAC PDU in the connected MAC PDUs, for example, the MAC located at the head using the HCS, the HT field, EC field, or CRC of the MAC PDU located at the head Even if the PDU is not a successfully decoded MAC PDU, the HCS, the HT field, the EC field, or the CRC of the next MAC PDU is used to determine whether the next MAC PDU is successfully decoded, and the next MAC PDU is decoded to receive data. That is, the receiver normally decodes the connected MAC PDUs using the HCS, HT field, EC field, or CRC of the next MAC PDU as well as one MAC PDU in the connected MAC PDUs to receive data. Next, a structure of a communication system according to an exemplary embodiment of the present invention will be described with reference to FIG. 1.

1 is a view schematically showing the structure of a communication system according to an embodiment of the present invention.

Referring to FIG. 1, the communication system includes a BS 110 that manages a predetermined cell 100, an MS1 120, and an MS2 that exist in the cell 100 and receive a service from the BS 110. 130. Here, the MSs, that is, MS1 (120), MS2 (130) has both mobility and fixed, and the signal transmission and reception between the BS (110) and the MSs (120, 130) is made using the OFDM / OFDMA scheme It will be explained on the assumption.

In addition, the transmitter of the BS 110 and the MSs 120 and 130 connects and transmits two or more MAC PDUs to reduce the overhead of control information, as described above, and the BS 110 and the MSs 120 and 130. The receiver of the UE verifies whether the decoding of each MAC PDU is successful using the HCS, the HT field, the EC field, or the CRC of the connected MAC PDUs, and receives the decoded MAC PDU. Next, the MAC PDU format in the communication system according to the embodiment of the present invention will be described with reference to FIG. 2.

2 is a diagram schematically illustrating a MAC PDU format in a communication system according to an embodiment of the present invention.

Referring to FIG. 2, the MAC PDU format includes a MAC PDU1 210 that does not include a payload corresponding to data transmitted by a transmitter to a receiver and a MAC PDU2 220 that includes the payload. Can be distinguished. In addition, the MAC PDUs 200 and the two or more MAC PDUs, that is, the first MAC PDU 260, the second MAC PDU 270, and the third MAC, which are not connected together with the MAC PDU1 210 and the MAC PDU2 220, may also be used. The PDU 280 may be divided into a MAC PDU 250 connected thereto.

The MAC PDU1 210 that does not include the payload includes the MAC header 212 located in the first 6 bytes and the last 1 byte of the MAC header 212 located in the first 6 bytes, that is, the MAC header 212. Contains the HCS 214 located in the sixth one byte and does not include the CRC. The MAC PDU2 220 including the payload includes a MAC header 222, a MAC payload 220, and a CRC 226 at the end. Here, the receiver checks whether the decoding of the MAC header 212 of the MAC PDU1 210 is successful using the HCS 214. That is, it checks whether the decoded MAC header information is correct and receives the normally decoded MAC PDU1 210. In addition, the receiver checks whether the MAC payload 224 is correct using the CRC 226 of the MAC PDU2 220 and receives the MAC PDU2 220 that is normally decoded.

In addition, the first MAC PDU 260, the second MAC PDU 270, and the third MAC PDU 280 of the connected MAC PDU 250 are MAC headers 262, 272, 282 located in the first 6 bytes and the MAC of 6 bytes, respectively. HCSs 264,274,284 located in the last 1 byte of headers 262,272,282, i.e., 6th 1 byte of MAC headers 262,272,282, and MAC payloads 266,276,286 located after the MAC headers 262,272,282. ), And CRCs 268, 278, and 288 located in the last byte of the MAC PDU after the MAC payloads 266, 276, and 286. Here, in the communication system according to an embodiment of the present invention, the receiver may include each MAC PDU of the connected MAC PDU 250, that is, the first MAC PDU 260, the second MAC PDU 270, and the third MAC PDU 280. In the 6th byte, HCSs 264, 274 and 284 or HT and EC fields of MAC headers 262, 272 and 282 are used to check whether the MAC headers 262, 272 and 282 are decoded successfully. That is, the first MAC PDU 260 and the second MAC PDU are checked by checking whether the decoded MAC header information is correct and whether the MAC payloads 266, 276, 286 located by using the CRCs 268, 278, and 288 located in each last byte are correct. In operation 270, the decoding success of the third MAC PDU 280 is determined. Accordingly, the receiver receives the MAC PDU normally decoded of the first MAC PDU 260, the second MAC PDU 270, and the third MAC PDUs 280.

In this case, the receiver compares the HCS located in the last byte of the MAC header with the HCS calculated by excluding the first 5 bytes, and confirms whether the decoded MAC header information is correct through the comparison result. If '1' is set in the bits of the HT field and the EC field, the MAC PDU is uplink (UL: UpLink, hereinafter referred to as 'UL'). Not included, the boundary of the MAC PDU connected through the bits of the HT field and the EC field can be inferred. In addition, the length of the MAC PDU is the length of the MAC PDU connected as a generic MAC header and 11-byte length information for downlink (DL) compressed MAP. Determine the boundary. Next, an operation of the receiver in the communication system will be described with reference to FIG. 3.

3 is a diagram illustrating an operation of a receiver in a communication system.

Referring to FIG. 3, first, as described above with reference to FIG. 2, in operation S302, two or more MAC PDUs, for example, a first MAC PDU 260, a second MAC PDU 270, and a third MAC PDU 280, are connected. Receive a burst containing Then, after reading the first 6 bytes of the burst in step S304, that is, the MAC header of the first MAC PDU 260 in the connected MAC PDU 250, the padding bits in the first 6 bytes read in step S306 Check for the presence of padding bits.

If there is no padding bits in the first 6 bytes as a result of checking in step S306, the HCS is calculated by excluding 5 bytes from the first 6 bytes in step S308. Then, it is checked whether the calculated HCS matches the sixth 1-byte HCS of the MAC header in step S310. If the HCS matches in the result of step S310, the padding connection identifier (CID: Connection) is assigned to the MAC header in step S312. Identifier, referred to as 'CID' hereinafter). If the padding CID does not exist as a result of checking in step S312, it is checked in step S314 whether '0' is set in the HT field of the MAC header. Here, if '0' is set in the HT field of the MAC header, the MAC header is a generic MAC header for DL or UL.

If the HT field of the MAC header is '0' in step S314, the remaining bytes other than the first 6 bytes are read from the total MAC PDU length in step S316. That is, in step S314, the MAC payload of the MAC PDU and the bytes of the CRC are read. Next, the CRC is calculated in step S318, and it is checked in step S320 whether the calculated CRC coincides with the CRC of the last 4 bytes of the MAC PDU. If the CRC does not match as a result of the checking in step S320, the first MAC PDU, for example, the first MAC PDU 260, is discarded in step S322. Next, in step S324, it is checked whether there are bytes to read in the burst, and if there are bytes to read in the burst as a result of the check in step S324, the flow proceeds to step S304.

On the other hand, if the HT field of the MAC header is not '0' as a result of the check in step S314, it is checked whether '1' is set in both the HT field and the EC field of the MAC header in step S326. Herein, when '1' is set in both the HT field and the EC field of the MAC header, the MAC header is a compressed DL-MAP message in the case of DL, and includes information for decoding the DL-MAP message. In case of the DL, if the HT field and the EC field of the MAC header are both '1' in step S326, after reading the remaining bytes except the first 6 bytes in the compressed MAP-message length in step S328, step S318. Proceed to calculate CRC.

If the HT field of the MAC header is '1' and the EC field is '0' in the DL as a result of the check in step S326, or if the HT field is not '0' in the UL, the MAC PDU decoded correctly in step S330; For example, the first MAC PDU 260 accurately decoded is transmitted to an upper layer through the successful decoding of the MAC header of the first MAC PDU 260. In addition, if the CRC coincides with the check result in step S320, the MAC PDU normally decoded in step S330, for example, the first MAC PDU 260 normally decoded through the CRC, is transmitted to the upper layer.

In addition, if the padding bits exist in the first 6 bytes read in step S306, the padding CID exists in step S312, or there is no byte to read in the burst in step S324, the MAC burst in step S332. After confirming that the decoding is successful, complete the decoding operation. If the HCS does not match as a result of the checking in step S310, the decoding of the MAC header is failed in step S334 and the MAC burst is abnormally decoded, and then the decoding operation is completed.

Thus, the receiver described with reference to FIG. 3 checks whether the decoding success of the MAC PDU, for example, the first MAC PDU 260, which is located at the head of two or more connected MAC PDUs, receives the decoded MAC PDU in case of decoding success, and in case of decoding failure. MAC PDU decoding after the connection will also fail. 4 to 6, an operation of receiving a connected MAC PDU by checking whether the decoding of the connected MAC PDU succeeds for each MAC PDU in the communication system according to an exemplary embodiment of the present invention will be described.

4 to 6 are diagrams illustrating an operation process of a receiver in a communication system according to an embodiment of the present invention.

4 to 6, first, as described above with reference to FIG. 2, in operation S402, two or more MAC PDUs, for example, a first MAC PDU 260, a second MAC PDU 270, and a MAC connected to a third MAC PDU 280, are described. Receive a burst that includes a PDU 250. Then, after reading the first 6 bytes of the MAC burst, that is, the MAC header of the first MAC PDU 260 in the connection MAC PDU 250 in step S404, whether the padding bits are present in the first 6 bytes read in step S406 Check it.

If there is no padding bits in the first 6 bytes as a result of checking in step S406, the HCS is calculated in step S408 excluding 5 bytes from the first 6 bytes. Then, it is checked whether the calculated HCS coincides with the HCS of the sixth 1 byte of the MAC header in step S410. If the HCS is matched in the check in step S410, in step S412, the presence of the padding CID is checked in the MAC header. do. If the padding CID does not exist as a result of the checking in step S412, it is checked in step S414 whether "0" is set in the HT field of the MAC header. Here, if '0' is set in the HT field of the MAC header, the MAC header is a generic MAC header for DL or UL.

If the HT field of the MAC header is '0' in step S414, the remaining bytes are read except the first 6 bytes in the total MAC PDU length in step S416. That is, in step S414, the MAC payload of the MAC PDU and the bytes of the CRC are read. Next, the CRC is calculated in step S418, and it is checked in step S420 whether the calculated CRC matches the CRC of the last 4 bytes of the MAC PDU. If the CRC does not match as a result of checking in step S420, the first MAC PDU, for example, the first MAC PDU 260, is discarded in step S422. Next, in step S424, it is checked whether there is a byte to read in the burst. If the check result in step S424 includes a byte to read in the burst, the flow proceeds to step S404.

On the other hand, if the HT field of the MAC header is not '0' as a result of the check in step S414, it is checked whether '1' is set in both the HT field and the EC field of the MAC header in step S426. Herein, when '1' is set in both the HT field and the EC field of the MAC header, the MAC header is a compressed DL-MAP message in the case of DL, and includes information for decoding the DL-MAP message. In the case of the DL, if the HT field and the EC field of the MAC header are both '1' in step S426, after reading the remaining bytes except the first 6 bytes in the compressed MAP-message length in step S428, step S418. Proceed to calculate CRC.

As a result of checking in step S426, when the HT field of the MAC header is '1' and the EC field is '0' in the DL, or when the HT field is not '0' in the UL, the success count of MAC PDU decoding in step S430 After updating, the MAC PDU correctly decoded in step S432, for example, the MAC header decoded correctly by the first MAC PDU 260, is correctly transmitted to the upper layer. In addition, if the CRC coincides with the check result in step S420, the MAC PDU correctly decoded in step S430, for example, the first MAC PDU 260 correctly decoded through the CRC, is transmitted to the upper layer.

If the padding bits are present in the first 6 bytes read in step S406, the padding CID exists in step S412, or there are no bytes to read in the burst in step S424, the MAC burst is successful in step S434. After confirming the decoding, the decoding operation is completed. If the HCS does not match, the MAC header decoding of the MAC PDU corresponding to the first MAC PDU, for example, the first MAC PDU 260, fails to decode the first MAC PDU 260 abnormally. After confirming that the decoding failure count is updated in step S436, it is checked whether the decoding failure count is the maximum failure count. Here, the decoding failure count may be different from the first MAC PDU 260 in the connected MAC PDU 250 when the receiver decodes two or more MAC PDUs according to an embodiment of the present invention. Even if the first MAC PDU 260 is abnormally decoded, it is set according to the environment of the system in order to normally receive the next MAC PDU in accordance with whether the next MAC PDU is successfully decoded.

If the decoding failure count is not the maximum as a result of checking in step S436, it is checked in step S438 whether the MAC header HT field of the first MAC PDU is '0'. If the MAC header HT field of the first MAC PDU is '0' as a result of checking in step S438, the first MAC PDU is abnormally decoded MAC PDU and thus discards the byte corresponding to the first MAC PDU. Then, it is checked whether there is a byte to read in the burst in step S442.

If there is a byte to read in the burst as a result of the check in step S442, the first 6 bytes of the burst in step S444, that is, the first 6 bytes of the second MAC PDU 270 corresponding to the next MAC PDU in the burst, that is, the second MAC PDU After reading the MAC header (270), it is checked in step S446 whether padding bits exist in the first 6 bytes.

If there is no padding bits in the first 6 bytes as a result of the checking in step S466, the HCS is calculated in step S468 excluding 5 bytes from the first 6 bytes. Then, it is checked whether the calculated HCS matches the HCS of the sixth 1 byte of the MAC header in step S450. If the HCS is matched as a result of the check in step S450, in step S452, the presence of a padding CID is checked in the MAC header. do. If the padding CID does not exist as a result of the checking in step S452, it is checked in step S454 whether '0' is set in the HT field of the MAC header. Here, if '0' is set in the HT field of the MAC header, the MAC header is a generic MAC header for DL or UL.

If the HT field of the MAC header is '0' as a result of checking in step S454, the remaining bytes other than the first 6 bytes are read from the total MAC PDU length in step S456. That is, in step S454, the MAC payload of the MAC PDU and the bytes of the CRC are read. Next, the CRC is calculated in step S458, and it is checked in step S460 whether the calculated CRC matches the CRC of the last 4 bytes of the MAC PDU. As a result of the checking in step S460, if the CRC does not match, after confirming that the MAC header of the next MAC PDU, for example, the second MAC PDU 270, fails to decode, the second MAC PDU 270 is abnormally decoded. In step S436, the decoding failure count is updated, and it is checked whether the decoding failure count is the maximum failure count.

On the other hand, if it is determined in step S460 that the CRC is matched, the burst of the next MAC PDU, for example, the second MAC PDU 270, in the burst, confirms that the second MAC PDU 270 is decoded and then S462. The MAC PDU decoded in step is transmitted to a higher layer. In step S464, the failure count and success count of the MAC PDU decoding are initialized to '0', and then in step S466, the existence of the bytes to be read in the burst is checked.

If there is a byte to read in the burst as a result of the check in step S466, the process proceeds to step S418. If there is no byte to read in the burst, after confirming that the burst has been successfully decoded in step S468, the decoding operation is completed. . In addition, if there is a check result padding bits in step S446 or a check result padding CID in step S452, the decoding operation is completed after confirming that the burst has been successfully decoded in step S468.

On the other hand, if the HT field of the MAC header is not '0' as a result of checking in step S438, in step S470, it is checked whether '1' is set in both the HT field and the EC field of the MAC header. Herein, when '1' is set in both the HT field and the EC field of the MAC header, the MAC header is a compressed DL-MAP message in the case of DL, and includes information for decoding the DL-MAP message. In case of the DL, if the HT field and the EC field of the MAC header are both '1' in step S470, after reading the remaining bytes except the first 6 bytes in the compressed MAP-message length in step S472, step S442 is performed. Proceed to check if there are any bytes to read in the burst.

If the HT field of the MAC header is '1' and the EC field is '0', or if the HT field is not '0' in UL, the first 6 bytes of the MAC header are discarded in step S474. After that, the flow proceeds to step S442 to check whether there are bytes to read in the burst. In addition, when the decoding failure count of the MAC PDU is the maximum as a result of the checking in step S436, the failure count and success count of the MAC PDU decoding are initialized to '0' in step S476, and the decoding of the connected MAC PDU fails in step S478. After confirming that the MAC burst has been abnormally decoded, the decoding operation is completed.

On the other hand, if the HT field of the MAC header is not '0' as a result of checking in step S454, in step S480, it is checked whether '1' is set in both the HT field and the EC field of the MAC header. Here, when '1' is set in both the HT field and the EC field of the MAC header, the MAC header includes information for decoding a compressed DL-MAP message in the case of DL. In case of the DL, if both the HT field and the EC field of the MAC header are '1' in step S480, after reading the remaining bytes except the first 6 bytes in the compressed MAP-message length in step S482, step S458. Proceed to calculate CRC.

If the HT field of the MAC header is '1' and the EC field is '0', or if the HT field is not '0' in the UL in step S480, after buffering the MAC PDU in the buffer in step S484 In step S486, it is determined whether the success count of decoding the MAC PDU is the minimum required success count. If the success count is greater than or equal to the minimum required success count in step S486, after the MAC header decoding success of the MAC PDU buffered in step S488 is transmitted to the higher layer, the MAC burst is transmitted in step S490. After confirming successful decoding, complete the decoding operation. In addition, if the success count is not the minimum required success count in step S486, the controller checks whether there are bytes to be read in the burst in step S442.

Thus, in the communication system according to the embodiment of the present invention, even if the first MAC PDU is abnormally decoded in two or more MAC PDUs, the receiver checks whether the remaining MAC PDUs are successfully decoded, that is, the HCS of the MAC PDU and the HT field of the MAC header. It checks whether the decoding succeeds through the EC field and the CRC, and receives the normally decoded MAC PDU.

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 defined not only by the scope of the following claims, but also by the equivalents of the claims.

1 schematically illustrates the structure of a communication system according to an embodiment of the invention.

2 schematically illustrates a MAC PDU format in a communication system according to an embodiment of the present invention.

3 is a diagram illustrating an operation of a receiver in a communication system.

4 to 6 are diagrams illustrating the operation of a receiver in a communication system according to an embodiment of the present invention.

Claims (16)

In the method of receiving data of a receiver in a wireless communication system, Receive a burst in which a plurality of packet data units (PDUs) are concatenated, and in the burst, the first packet data unit through a header check sequence (HCS) of a first packet data unit Confirming the success of the first decoding on, The decoding count is updated according to whether the first decoding is successful, and when the first decoding fails, the second decoding for the second packet data unit is performed through a header check sequence of the second packet data unit in the burst. Confirming success and decoding the second packet data unit. The method of claim 1, Checking whether the first decoding is successful, after calculating a header check sequence by reading a predetermined byte from the burst, confirms whether the first decoding is successful through the calculated header check sequence. How to receive data. The method of claim 1, Confirming whether the second decoding is successful, after discarding the first packet data unit in the burst, after calculating the header check sequence by reading a predetermined byte from the burst in which the first packet data unit is discarded And checking whether the second decoding is successful through the calculated header check sequence. The method according to claim 2 or 3, Success confirmation of the first decoding or the second decoding, characterized in that for confirming the position of the header check sequence in the read byte. The method of claim 1, Confirming whether the first decoding or the second decoding is successful may be performed through a field or a cyclic redundancy check (CRC) of a header corresponding to the first packet data unit or the second packet data unit. A data receiving method characterized by the above-mentioned. The method of claim 5, Checking whether the first decoding is successful, after calculating a cyclic redundancy check by reading a predetermined byte from the burst, and confirming the success of the first decoding through the calculated cyclic redundancy check How to receive data. The method of claim 5, Confirming whether the second decoding is successful, after discarding the first packet data unit in the burst, calculating the cyclic redundancy check by reading a predetermined byte from the burst in which the first packet data unit is discarded. And checking whether the second decoding is successful through the calculated cyclic redundancy check. The method according to claim 6 or 7, Success confirmation of the first decoding or the second decoding, the data receiving method, characterized in that for confirming the position of the cyclic redundancy check in the read byte. The method of claim 5, Confirming whether the first decoding or the second decoding is successful, confirming the type of the header by checking a value set in the field of the header, and reading and confirming a predetermined byte in the burst according to the checked header type. Data receiving method, characterized in that. The method of claim 1, The decoding count update is updated if the decoding of the first packet data unit fails. The method of claim 10, The acknowledgment of the success or failure of the second decoding may determine whether to perform the success or failure of the second decoding according to the updated decoding count. An apparatus for receiving data in a wireless communication system, The receiving device includes a receiver for receiving a burst in which a plurality of packet data units (PDUs) are concatenated, The receiver may be configured to perform a header check sequence (HCS: Header Check Sequence) of a first packet data unit, a field of a header corresponding to the first packet data unit, or a cyclic redundancy check (CRC) in the burst. Confirm success of the first decoding for the first packet data unit, update the decoding count according to whether the first decoding is successful, and if the first decoding fails, in the burst the header of the second packet data unit The second packet data unit is decoded by confirming the success of the second decoding on the second packet data unit through a check sequence and a field of a header corresponding to the second packet data unit or cyclic redundancy check. Data receiving device. The method of claim 12, And the receiver updates the count if decoding of the first packet data unit fails. In the method of receiving data of a receiver in a wireless communication system, Receiving a burst comprising a plurality of concatenated Media Access Control (MAC) Packet Data Units (PDUs); Performing first decoding on a first medium connection control packet data unit in the burst; And performing a second decoding on a second medium access control packet data unit using the length information in the first medium access control packet data unit when the first decoding fails. The method of claim 14, In the performing of the second decoding, when the second medium access control packet data unit includes a Cyclic Redundancy Check (CRC) code, the second decoding may be performed by checking an error of the cyclic redundancy check code. The method of claim 1, further comprising the step of checking the success of the data. The method of claim 15, The performing of the second decoding may include: a header check sequence included in the second medium access control packet data unit (HCS) when the second medium access control packet data unit does not include the cyclic redundancy check code. And checking whether the second decoding succeeds by checking whether there is an error.

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