KR20080104664A - Apparatus and method for transmitting and receiving data in a communication system - Google Patents

Abstract

An apparatus and a method for transmitting and receiving data in a communication system are provided to obtain the information of packet order based on the resource allocation information of packets. A method for receiving an SDU(Service Data Unit) comprises the steps of: receiving a burst from a base station; judging a sequence number of the burst; judging a sequence number of a PDU(Protocol Data Unit) included in the burst; and configuring an SDU with at least one PDU by considering the judged PDU sequence number. An SDU generating unit(101) generates an SDU, and a PDU generating unit(105) generates a PDU by dividing the SDU. An MAP generating unit(103) generates MAP information by performing scheduling of a transmitter and a receiver. A burst generating unit(107) generates a burst by including at least one generated PDU, and a burst/PDU sequence number storage(109) stores the burst and PDU sequence numbers.

Description

Apparatus and method for transmitting and receiving data in communication system {APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA IN A COMMUNICATION SYSTEM}

1 is a diagram illustrating a transmitting device in a communication system according to an exemplary embodiment of the present invention.

2 is a diagram illustrating a receiving apparatus in a communication system according to an exemplary embodiment of the present invention.

3 is a diagram schematically showing data transmitted by a transmitter in a communication system according to an embodiment of the present invention.

4 is a diagram schematically showing data transmitted by a transmitter in a communication system according to an embodiment of the present invention.

5 is a diagram schematically showing data transmitted by a transmitter in a communication system according to an embodiment of the present invention.

6 is a diagram illustrating a data transmission process of a transmitter in a communication system according to an embodiment of the present invention.

7 is a diagram illustrating a process in which a receiver receives data in a communication system according to an embodiment of the present invention.

The present invention relates to a communication system, and more particularly, to an apparatus and method for transmitting and receiving data in a communication system.

The next generation communication system has been developed in the form of a packet service communication system, and the packet service communication system divides data into a plurality of packet forms and transmits the data to a mobile station (MS).

Meanwhile, in the packet service communication system, when a base station (BS) generates data to be transmitted to the terminal, that is, a service data unit (SDU), the base station (BS) generates a plurality of packet types, that is, a plurality of packets. A protocol data unit (PDU) is divided into bursts, and a burst including at least one or more PDUs is transmitted to the terminal. At this time, the base station includes packet order information in the PDU header. The terminal completes one SDU by collecting at least one or more PDUs in the burst using the packet order information.

In the Institute of Electrical and Electronics Engineers (IEEE) 802.16e system, the base station uses 3 bits or 11 bits to inform the terminal of the packet order.

However, as described above, there is a problem in that overhead of the PDU header occurs when 3 or 11 bits of packet order information is included in each of the PDUs.

Accordingly, the present invention proposes a data transmission / reception apparatus and method for reducing the overhead of a packet header in a communication system.

In addition, the present invention proposes a data transmission / reception apparatus and method for notifying packet order information based on resource allocation information of packet data in a communication system.

Hereinafter, the operation principle of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

The method of the present invention includes a method of receiving a service data unit (SDU) of a terminal in a communication system, the method comprising: receiving a burst from a base station, determining a sequence number of the burst, and including the burst within the burst; Determining a sequence number of the protocol data unit (PDU) and configuring the SDU with at least one PDU in consideration of the determined PDU sequence number.

According to another aspect of the present invention, in a method for transmitting a service data unit (SDU) of a base station in a communication system, when an SDU to be transmitted to a terminal is generated, the generated SDU is transmitted to a predetermined protocol data unit (PDU). ), Storing the sequence number of the divided PDU, generating the predetermined PDU in the form of burst data, and transmitting the generated burst data to the terminal.

The apparatus of the present invention is a service data unit (SDU) receiving apparatus in a communication system, which receives a burst, determines a sequence number of the burst, and includes a protocol data unit (PDU: Protocol) included in the burst. And a terminal configured to determine a sequence number of the data unit and to configure an SDU with at least one or more PDUs in consideration of the determined PDU sequence number.

Another apparatus of the present invention is a service data unit (SDU) transmitting apparatus in a communication system, when an SDU to be transmitted to a terminal is generated, the generated SDU is converted into a predetermined protocol data unit (PDU). And a base station for dividing, storing a sequence number of the divided predetermined PDU, generating the predetermined PDU in the form of burst data, and transmitting the generated burst data to a terminal.

The present invention proposes a data transmission / reception apparatus and method for reducing overhead in a communication system.

In the embodiment of the present invention to be described later in the Institute of Electrical and Electronics Engineers (IEEE) 802.16 communication system when transmitting data from a transmitter, for example, a base station (BS) from a base station (BS), a receiver (MS) mobile station (MS) An apparatus and method are provided. However, the data transmission and reception apparatus and method proposed by the present invention can be applied to other communication systems as well. In addition, the present invention will be described by using a downlink (Downlink) in which the base station transmits data to the terminal as an example, of course, the same can be applied to the uplink (Uplink).

Next, an apparatus for transmitting data to a receiver by a transmitter in a communication system according to an embodiment of the present invention will be described with reference to FIG. 1.

1 is a diagram illustrating a transmitter in a communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the transmitting apparatus includes an SDU generation unit 101 for generating a service data unit (hereinafter, referred to as an SDU), and a protocol data unit by dividing the SDU. A PDU generation unit 105 for generating a PDU), a MAP generation unit 103 for generating MAP information through scheduling of the transmitter and the receiver, and the generated at least one PDU. A burst generation unit 107 for generating bursts, a burst / PDU sequence number storage unit 109 for storing bursts and PDU sequence numbers, and a code and modulation generated by the MAP generation unit; And a code and modulator 111 for performing code and modulation, and a transmitter 113 for transmitting a radio frequency (RF) signal for performing the code and modulation.

The SDU generating unit 101 generates an SDU corresponding to a communication service to be provided to the receiver. At this time, the transmitter performs scheduling with the receiver. Next, the MAP generation unit 103 generates MAP information corresponding to the scheduling information between the transmitter and the receiver and transmits the MAP information to the PDU generation unit 105. The MAP information includes a burst size, code and modulation scheme (MCS) information applied to the burst. The PDU generator 105 generates the SDU as a predetermined PDU according to the MAP information and transmits the SDU to a burst generator 107.

Next, the burst generator 107 generates the predetermined PDU in the form of burst data and transmits it to the burst / PDU sequence number storage unit 109. The burst / PDU sequence number storage unit 109 stores the PDU sequence number corresponding to the burst-type PDU received by the burst generator 107 and transmits the PDU sequence number to the code and modulator 111. In this case, the burst / PDU sequence number storage unit 109 stores the PDU transmitted to the receiver if the transmitter can provide an Automatic Repeat Request (ARQ) function. This is because, when the receiver requests the retransmission of the PDU having the predetermined sequence number transmitted by the transmitter to the receiver, the PDU having the predetermined sequence number can be retransmitted. The code and modulator 111 encodes the PDU received from the burst / PDU sequence number storage unit 109 according to the MAP information generated by the MAP generator, and modulates the PDU according to a predetermined modulation scheme. Output as a signal and transmit to the transmitter 113. The transmitter 113 transmits the RF signal to a receiver.

Next, an apparatus in which a receiver receives data from a transmitter in a communication system according to an embodiment of the present disclosure will be described with reference to FIG. 2.

2 is a diagram illustrating a receiving apparatus in a communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the reception apparatus includes a receiver 201 that receives an RF signal from a transmitter, a decoder and demodulator 203 that performs decoding and demodulation of the received RF signal, and performs the decoding and demodulation. A MAP decoding unit 205 for obtaining MAP information from an RF signal, a burst extracting unit 207 for obtaining a burst corresponding to the MAP information, a PDU extraction unit 209 for obtaining a predetermined PDU from the burst, and A burst / PDU sequence number calculator 211 for calculating a sequence number of the received PDU according to the MAP information, and an SDU assembly unit 213 for acquiring the SDU according to the sequence number. do.

The receiver 201 receives the RF signal transmitted by the transmitter 113 of the transmitter, and transmits the received RF signal to the decoder and demodulator 203. The decoding and demodulation unit 203 decodes and demodulates the RF signal according to a decoding and demodulation scheme and transmits the RF signal to the MAP decoding unit 205. The MAP decoder 205 obtains MAP information from the decoded and demodulated RF signal, obtains information on a PDU to be received by the receiver, and transmits the information to the burst extractor 207. In the burst extractor 207, the receiver extracts a burst region corresponding to the MAP information and transmits the burst region to the PDU extractor 209. Next, the PDU extractor 209 obtains a PDU in the extracted burst region and transmits the PDU to the burst / PDU sequence number calculator 211. The burst / PDU sequence number calculator 211 calculates and stores a sequence number of the obtained PDU. At this time, if the receiver is a receiver capable of supporting an ARQ function, it is determined whether the received PDU is in error. If the received PDU does not generate an error, the sequence number of the PDU is fed back to the transmitter. Next, the SDU assembling unit 213 assembles the received PDU corresponding to the sequence number calculated and stored in the burst / PDU sequence number calculating unit, and obtains the SDU through the assembled PDU.

Next, a process for obtaining an order of PDUs transmitted from a transmitter to a receiver in a communication system according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5.

3 is a diagram schematically showing data transmitted by a transmitter in a communication system according to an embodiment of the present invention. 3 will be described using a single burst system as an example.

Referring to FIG. 3, the single burst system refers to a system in which a receiver receives only one burst in each frame. First, it is assumed that the transmitter transmits burst # 1 321 in frame t 300 and burst # 2 323 in frame t + 1 350. In addition, it is assumed that the transmitter divides SDU # 1 311 into PDU # 1 and PDU # 2, and transmits SDU # 2 313 to PDU # 3.

Meanwhile, the sequence number of the burst may be defined as a frame number, and the sequence number of the PDU in the burst may be defined by Equation 1 below.

PDU sequence number = burst sequence number X 10 + PDU index within the burst

For example, when the number of the frames t 300 is '10', the sequence number of the burst # 1 321 may be defined as '10'. The sequence number of the PDU # 1 315 is defined by Equation 1. That is, the sequence number of the PDU # 1 315 is determined by multiplying the burst sequence number 10 by 10 and adding a value corresponding to the PDU index in the burst # 1 321, that is, '1'. That is, since the sequence number of the PDU # 1 315 transmitted in the frame t 300 is (10x10) +1, it is '101'.

In addition, when the number of the frames t + 1 350 is '11', the sequence number of the burst # 2 323 may be defined as '11'. The sequence number of PDU # 2 317 is defined by Equation 1. That is, the sequence number of the PDU # 2 317 is determined by multiplying the burst sequence number 11 by 10 and adding a value corresponding to the PDU index in the burst # 2 323, that is, '1'. That is, since the sequence number of PDU # 2 317 transmitted in the frame t + 1 350 is (11x10) +1, it is '111'.

In addition, when the number of the frames t + 1 350 is '11', the sequence number of the burst # 2 323 may be defined as '11'. The sequence number of PDU # 3 319 is defined by Equation 1. That is, the sequence number of the PDU # 3 319 is determined by multiplying the burst sequence number 11 by 10 and adding a value corresponding to the PDU index in the burst # 2 323, that is, '2'. That is, since the sequence number of PDU # 3 319 transmitted to the frame t + 1 350 is (11x10) +2, it is '112'.

4 is a diagram schematically showing data transmitted from a transmitter to a receiver in a communication system according to an exemplary embodiment of the present invention. 4 will be described using a multi-burst system as an example.

Referring to FIG. 4, the multi-burst system refers to a system in which a receiver receives at least one burst in each frame. First, it is assumed that the transmitter transmits two bursts for each frame to the receiver. That is, the transmitter transmits burst # 1 427 and burst # 2 429 in frame t400, and transmits burst # 1 431 and burst # 2 in frame t + 1 450.

On the other hand, the sequence number of the burst may be defined in the following equation (2).

Burst Sequence Number = Frame Number X 10 + MAP IE Assignment Order

In addition, the PDU sequence number in the burst may be defined in the following equation (3).

PDU sequence number = burst sequence number X 10 + PDU index

For example, if the number of the frames t 400 is '10', the sequence number of the burst # 1 427 is defined by Equation 2. That is, the sequence number of burst # 1 427 is determined by multiplying the frame number '10' by 10 and adding a value corresponding to the MAP IE allocation order, that is, '1'. That is, since the sequence number of burst # 1 (427) transmitted in the frame t (400) is (10X10) + 1, it is '101'. Next, the sequence number of the PDU # 1 417 in the burst # 1 427 is defined by Equation 3. That is, the sequence number of the PDU # 1 417 is determined by multiplying the burst sequence number 101 by 10 and adding a value corresponding to the PDU index in the burst # 1 427, that is, '1'. That is, since the sequence number of the PDU # 1 417 transmitted in the frame t (400) is (101X10) +1, it is '1011'.

In addition, when the number of the frame t (400) is '10', the sequence number of the burst # 2 (429) is defined by the equation (2). That is, the sequence number of burst # 2 429 is determined by multiplying the frame number '10' by 10 and adding a value corresponding to the MAP IE allocation order, that is, '2'. That is, since the sequence number of burst # 2 (429) transmitted in the frame t (400) is (10X10) + 2, it is '102'. Next, the sequence number of PDU # 2 419 in burst # 2 429 is defined by equation (3). That is, the sequence number of the PDU # 2 419 is determined by multiplying the burst sequence number 102 by 10 and adding a value corresponding to the PDU index in the burst # 2 429, that is, '1'. That is, since the sequence number of the PDU # 2 419 transmitted to the frame t 400 is (102X10) +1, it is '1021'.

In addition, when the number of the frame t (400) is '10', the sequence number of the burst # 2 (429) is defined by the equation (2). That is, the sequence number of burst # 2 429 is determined by multiplying the frame number '10' by 10 and adding a value corresponding to the MAP IE allocation order, that is, '2'. That is, since the sequence number of burst # 2 (429) transmitted in the frame t (400) is (10X10) + 2, it is '102'. Next, the sequence number of PDU # 3 421 in burst # 2 429 is defined by equation (3). That is, the sequence number of the PDU # 3 421 is determined by multiplying the burst sequence number 102 by 10 and adding a value corresponding to the PDU index in the burst # 2 429, that is, '2'. That is, since the sequence number of PDU # 3 421 transmitted in the frame t 400 is (102X10) +2, it is '1022'.

Next, when the number of the frames t + 1 450 is '11', the sequence number of the burst # 1 431 is defined by Equation 2. That is, the sequence number of the burst # 1 431 is determined by multiplying the frame number '11' by 10 and adding a value corresponding to the MAP IE allocation order, that is, '1'. That is, since the sequence number of the burst # 1 431 transmitted to the frame t + 1 450 is (11X10) +1, it is '111'. Next, the sequence number of PDU # 4 423 in burst # 1 431 is defined by equation (3). That is, the sequence number of the PDU # 4 423 is determined by multiplying the burst sequence number 111 by 10 and adding a value corresponding to the PDU index in the burst # 1 431, that is, '1'. That is, since the sequence number of the PDU # 4 423 transmitted in the frame t + 1 450 is (111X10) +1, it is '1111'.

Further, when the number of the frames t + 1 450 is '11', the sequence number of the burst # 1 431 is defined by Equation 2. That is, the sequence number of the burst # 1 431 is determined by multiplying the frame number '11' by 10 and adding a value corresponding to the MAP IE allocation order, that is, '1'. That is, since the sequence number of burst # 1 431 transmitted to the frame t + 1 450 is (11X10) +1, it is '111'. Next, the sequence number of PDU # 5 425 in burst # 1 431 is defined by equation (3). That is, the sequence number of the PDU # 5 425 is determined by multiplying the burst sequence number 111 by 10 and adding a value corresponding to the PDU index in the burst # 1 431, that is, '2'. That is, since the sequence number of the PDU # 5 425 transmitted in the frame t + 1 450 is (111X10) +2, it is '1112'.

Meanwhile, in FIG. 4, when the transmitter or the receiver supports ARQ, it is assumed as an example that an error occurs in PDU # 2. At this time, the receiver receives PDU # 1 to PDU # 5 from the transmitter. The receiver feeds back to the transmitter that the PDUs # 1 to PDU # 5 have been normally received except for the error PDU #PDU # 2. Accordingly, the transmitter recognizes that the receiver did not normally receive PDU # 2, and retransmits the PDU # 2 to the receiver.

Next, FIG. 5 schematically illustrates data transmitted from a transmitter to a receiver in a communication system according to an exemplary embodiment of the present invention. 5 will be described with reference to an example of a communication system using two different FAs.

Referring to FIG. 5, in the communication system, a transmitter transmits data to a receiver through FA 1 through FA 2. Here, the FA may be a frequency assignment (FA). In addition, the transmitter transmits burst # 1 527 and burst # 2 529 through FA 1 and transmits burst # 1 531 through FA 2 during frame t 500. In addition, burst # 1 533 is transmitted on FA 1 during frame t + 1 550.

On the other hand, the sequence number of the burst may be defined in the following equation (4).

Burst Sequence Number = (Frame Number X 100) + (FA Index X 10) + MAP IE Assignment Order

In addition, the PDU sequence number in the burst may be defined as Equation 4 below.

PDU sequence number = burst sequence number X10 + PDU index

For example, when the number of the frames t 500 is '10', the sequence number of the burst # 1 527 is defined by Equation 4. That is, the sequence number of burst # 1 (527) multiplies the frame number '10' by 100, the value corresponding to the FA index, that is, FA 1, and thus multiplies '1' by 10, and corresponds to the MAP IE allocation order. , That is, by adding '1'. That is, since the sequence number of the burst # 1 (527) transmitted in the frame t (500) is (10X100) + (1X10) + 1, it is '1011'. Next, the sequence number of PDU # 1 517 in burst # 1 527 is defined by Equation 5. That is, the sequence number of the PDU # 1 517 is determined by multiplying the burst sequence number 1011 by 10 and adding a value corresponding to the PDU index in the burst # 1 527, that is, '1'. That is, since the sequence number of PDU # 1 517 transmitted in the frame t (500) is (1011X10) +1, it is '10111'.

Also, if the number of the frames t 500 is '10', the sequence number of the burst # 2 529 is defined by Equation 4. That is, the sequence number of the burst # 2 (529) is multiplied by 100 to the frame number '10', the value corresponding to the FA index, that is, FA 1, multiplied by '1' to 10, the value corresponding to the MAP IE allocation order , That is, by adding '2'. That is, since the sequence number of burst # 2 (529) transmitted in the frame t (500) is (10X100) + (1X10) + 2, it is '1012'. Next, the sequence number of PDU # 2 519 in burst # 2 529 is defined by equation (5). That is, the sequence number of the PDU # 2 519 is determined by multiplying the burst sequence number 1012 by 10 and adding a value corresponding to the PDU index in the burst # 2 529, that is, '1'. That is, since the sequence number of the PDU # 2 519 transmitted in the frame t (500) is (1012X10) +1, it is '10121'.

In addition, when the number of the frames t 500 is '10', the sequence number of the burst # 1 531 is defined by Equation 4. That is, the sequence number of burst # 1 (531) is multiplied by 100 to the frame number '10', the value corresponding to the FA index, that is, FA 2, and multiplied by '2' to 10, the value corresponding to the MAP IE allocation order. , That is, by adding '1'. That is, since the sequence number of burst # 1 531 transmitted in the frame t (500) is (10X100) + (2X10) + 1, it is '1021'. Next, the sequence number of PDU # 3 521 in burst # 1 531 is defined by Equation 5. That is, the sequence number of the PDU # 3 521 is determined by multiplying the burst sequence number 1021 by 10 and adding a value corresponding to the PDU index in the burst # 1 531, that is, '1'. That is, since the sequence number of the PDU # 3 521 transmitted in the frame t 500 is (1021X10) +1, it is '10211'.

Next, when the number of the frames t + 1 550 is '11', the sequence number of the burst # 1 533 is defined by Equation 4. That is, the sequence number of burst # 1 (533) multiplies the frame number '11' by 100, the value corresponding to the FA index, that is, FA 1, and thus multiplies '1' by 10, and corresponds to the MAP IE allocation order. , That is, by adding '1'. That is, since the sequence number of burst # 1 533 transmitted to the frame t + 1 550 is (11X100) + (1X10) +1, it is '1111'. Next, the sequence number of PDU # 4 523 in burst # 1 533 is defined by equation (5). That is, the sequence number of the PDU # 4 523 is determined by multiplying the burst sequence number 1111 by 10 and adding a value corresponding to the PDU index in the burst # 1 533, that is, '1'. That is, since the sequence number of the PDU # 4 523 transmitted to the frame t + 1 550 is (1111X10) +1, it is '11111'.

Further, if the number of the frames t + 1 550 is '11', the sequence number of the burst # 1 533 is defined by Equation 4. That is, the sequence number of burst # 1 533 multiplies the frame number '11' by 100, multiplies the value corresponding to the FA index, that is, multiplies' 1 'by 10, and corresponds to the MAP IE allocation order, that is,' Is determined by adding 1 '. That is, since the sequence number of burst # 1 533 transmitted to the frame t + 1 450 is (11X100) + (1X10) +1, it is '1111'. Next, the sequence number of PDU # 5 525 in burst # 1 533 is defined by equation (5). That is, the sequence number of the PDU # 5 525 is determined by multiplying the burst sequence number 1111 by 10 and adding the value corresponding to the PDU index in the burst # 1 533, that is, '2'. That is, since the sequence number of the PDU # 5 525 transmitted in the frame t + 1 550 is (1111X10) +2, it is '11112'.

Although not shown in the drawing, the packet order method is performed by the transmitter and the receiver transmitting and receiving a subscriber station basic capability (SBC) request (REQ: REQuest) and an SBC response (RSP: ReSPonse) message.

For example, when the transmitter transmits an SBC-REQ message to the receiver, the transmitter includes a TLV (Type-Length-Value) type field as shown in Table 1 below in the SBC-REQ message.

Type Length Value 100 One Bit # 0: Support packet sequence number calculation (0: Not supported, 1: Supported) Bit # 1-7: Reserved, shall be set to zero

In this case, when the transmitter transmits 1 byte of negotiation information to the receiver, setting the first bit to 1 indicates that the transmitter supports the PDU sequence number calculation method described above. It does not support the PDU sequence number calculation method described above.

When the receiver receives the SBC-REQ message from the transmitter, the receiver transmits an SBC-RSP message including a TLV field as shown in Table 2 to the transmitter.

Type Length Value 100 One Bit # 0: Whether to use packet sequence number calculation (0: don't use, 1: use) Bit # 1-7: Reserved, shall be set to zero

Here, the receiver receives the SBC-REQ message to determine whether to use the sequence number calculation scheme. As a result of the determination, when the receiver determines to use the PDU sequence number calculation method, if the first bit is set to 1 and is transmitted through the SBC-RSP message, and when the receiver determines not to use the PDU sequence number calculation method, The first bit is set to 0 and transmitted through the SBC-RSP message.

Next, a data transmission process of a transmitter in a communication system according to an exemplary embodiment of the present invention will be described with reference to FIG. 6.

6 is a diagram illustrating a data transmission process of a transmitter in a communication system according to an embodiment of the present invention.

Referring to FIG. 6, in step 601, the transmitter generates an SDU to be transmitted to a receiver and proceeds to step 603. In step 603, the transmitter performs scheduling with the receiver to generate MAP information according to the scheduling result. The transmitter proceeds to step 607 after generating the generated SDU as a predetermined PDU in step 605. In step 607, the transmitter generates the predetermined PDU in the form of burst data and proceeds to step 609. In step 609, the transmitter stores the sequence number of the PDU and proceeds to step 611. In step 611, the transmitter transmits the PDU to the receiver and ends.

Next, a process of receiving data by a receiver in a communication system according to an exemplary embodiment of the present invention will be described with reference to FIG. 7.

7 is a diagram illustrating a process of receiving data by a receiver in a communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 7, in step 701, the receiver receives an RF signal from a transmitter, decodes and demodulates the received RF signal, and proceeds to step 703. In step 703, the receiver acquires MAP information through the decoded and demodulated RF signal and proceeds to step 705. In step 705, the receiver extracts a burst to be received by the receiver through the MAP information and proceeds to step 707. Next, in step 707, the receiver acquires a PDU from the extracted burst and proceeds to step 709. In step 709, the receiver calculates a sequence number of the obtained PDU. In addition, if the receiver is a terminal capable of supporting ARQ, it transmits an acknowledgment message indicating that the received PDU is normally received to the transmitter. In step 711, the receiver assembles the PDU according to the obtained sequence number of the PDU, and obtains an SDU through the assembled PDU.

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

As described above, the present invention is proposed to reduce the overhead of a packet header in a communication system, and has an advantage of obtaining packet order information based on resource allocation information of a packet.

Claims (10)

A method of receiving a service data unit (SDU) of a terminal in a communication system, Receiving a burst from a base station, Determining a sequence number of the burst; Determining a sequence number of a protocol data unit (PDU) included in the burst; And configuring the SDU from at least one PDU in consideration of the determined PDU sequence number. The method of claim 1, The process of determining the sequence number of the burst, And a frame number, an operating frequency index, and an MAP information element (IE) allocation order transmitted by the base station. The method of claim 1, The process of determining the sequence number of the PDU, A service data unit receiving method characterized by using a burst sequence number and a PDU index. The method of claim 1, The process of determining the sequence number of the PDU, Calculating the sequence number of the PDU to determine whether the PDU is normally received, and including the determination result in a feedback message and transmitting the result to the base station. A method of transmitting a service data unit (SDU) of a base station in a communication system, When the SDU to be transmitted to the terminal is generated, dividing the generated SDU into a predetermined protocol data unit (PDU); Storing the sequence numbers of the divided predetermined PDUs and generating the predetermined PDUs in the form of burst data; And transmitting the generated burst data to a terminal. An apparatus for receiving a service data unit (SDU) in a communication system, A burst is received, a sequence number of the burst is determined, a sequence number of a protocol data unit (PDU) included in the burst is determined, and at least one PDU is considered in consideration of the determined PDU sequence number. And a service data unit receiving apparatus comprising a terminal constituting a terminal. The method of claim 6, The terminal, And determining the sequence number of the burst by using a frame number transmitted from the base station, an operating frequency index, and an MAP information element allocation order. The method of claim 1, The terminal, And determining a sequence number of the PDU using a burst sequence number and a PDU index. The method of claim 1, The terminal, And calculating the sequence number of the PDU to determine whether the PDU is normally received, and including the determination result in a feedback message and transmitting the result to the base station. An apparatus for transmitting a service data unit (SDU) in a communication system, When an SDU to be transmitted to the terminal is generated, the generated SDU is divided into a predetermined protocol data unit (PDU), the sequence number of the divided predetermined PDU is stored, and the predetermined PDU is in the form of burst data. And a base station for generating and transmitting the generated burst data to a terminal.

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