JP2000349814A - Radio communication apparatus and radio communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent data, whose restoration is not affected from a frame loss, from being not restored caused by even division data not substantially required to be discarded relating to data not affected for the restoration by the frame loss that takes place in a transmission line. SOLUTION: An SDU head detection section 102 of a transmitter 100 detects the head of transmission data, and an LI provision section 104 adds length identifier denoting a break of data into the head of the data as well as the end of the data. An SDU assembly section 115 of a receiver 110 obtains received data by detecting the break of the data depending on the length identifier denoting the head of data even when a frame having the length identifier denoting the end of data is lost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a radio communication method and a radio communication apparatus in a digital radio communication system.

[0002]

2. Description of the Related Art Conventionally, the following method is used for a transmitter to assemble data into a frame and transmit the data, and a receiver to obtain data from a received frame.

FIG. 4 is a schematic diagram showing an example of a frame format used for wireless communication. In FIG.
A frame (indicated as “PDU” in FIG. 4) is composed of control information and a payload, and the control information is a continuous sequence number (indicated as “SN” in FIG. 4).
And a length identifier (indicated as "LI" in FIG. 4).
It is configured by an extension flag (shown as “E” in FIG. 4) indicating the presence or absence of a length identifier.

The transmitter transmits data (“SD” in FIG. 4).
U ". ), The data is divided into divided data having a fixed payload length (indicated as “divided SDU” in FIG. 4), control information is added thereto, and the data is assembled into a frame and transmitted.

[0005] For example, as shown in FIG.
When transmitting the DU 11, the SDU 11 is divided into the divided SDU 12 having a fixed payload length and the remaining divided SDU 13 because the SDU 11 does not fit in one payload. Then, the transmitter sets the sequence number 15 and the extension flag 16 in the payload 14 in which the divided SDU 12 is stored, and assembles the PDU 17 to transmit. In this case, since the payload 14 is filled with the divided SDU 12, it is not necessary to set a length identifier. Since there is no length identifier following the sequence number 15 in the control information, the extension flag 16 is set to “0”. You.

[0006] For the divided SDU 13, the transmitter determines that the divided SDU 13 does not satisfy the payload 18,
Since a transmission interval is provided between the U11 and the SDU 31, a portion after the divided SDU 13 is padded with padding (indicated as “Pad” in FIG. 4) 19 so as to fill the payload 18. Then, the transmitter sets the sequence number 20, the length identifiers 21 and 22, and the extension flags 23, 24 and 25 in the payload 18, and assembles and transmits the PDU 26. In this case, in order to indicate the end of the SDU 11, the length identifier 21 is divided S from the leading end of the payload 18.
The length of the DU 13 is set to “a”. Further, the length identifier 22 is set to “Pad” indicating that the divided SDU 13 and the subsequent portions are filled with padding 19 because padding 19 is used. Also, the extension flag 2
No. 3 is extended to “1” because the length identifier 21 following the sequence number 20 exists in the control information, and the extension flag 24 is extended to “1” because the length identifier 22 following the length identifier 21 exists. The flag 25 is set to “0” because there is no length identifier following the length identifier 22.

[0007] Next, for SDU31, the transmitter may not be able to fit SDU31 in one payload.
The SDU 31 is divided into a divided SDU 32, a divided SDU 33 having a fixed payload length, and the remaining divided SDU 34.
Then, the transmitter transmits the payload 35 and the payload 3
As for the PDU 9, the PDU 38 and the PDU 42 are assembled and transmitted in the same procedure as the procedure for assembling the PDU 17.

[0008] Further, with respect to the divided SDU 34, the transmitter determines that the divided SDU 34 does not satisfy the payload 43,
Since there is an SDU 51 to be transmitted following the U31, the divided SDU 52 corresponding to the remaining payload length after storing the divided SDU 34 in the payload 43 is divided from the SDU 51, and the divided SDU 52 is added to the divided SDU 34.
Then, the transmitter adds the sequence number 4 to the payload 43.
4, a length identifier 45, and extension flags 46 and 47 are set, assembled into a PDU 48, and transmitted. In this case, the length identifier 45 is set to the length “b” of the divided SDU 34 from the leading end of the payload 43 to indicate the end of the SDU 31. The extension flag 46 is set to "1" because the length identifier 45 following the sequence number 44 is present in the control information, and the extension flag 47 is set to "0" because there is no length identifier following the length identifier 45. Are set respectively.

As described above, when the end of data is present in the payload, the transmitter uses the length identifiers “LI = a”, “LI = b”, etc., indicating the end of the data, as control information, as payload. To assemble the frame and transmit it to the receiver. On the other hand, when receiving each frame, the receiver decomposes each frame into respective divided data in a procedure reverse to the above-described procedure in which the transmitter assembles the frame, and combines the divided data to obtain received data. .

Next, the operation of the receiver when the frame transmitted from the transmitter is lost in the transmission path during transmission will be described. If the transmission frame is lost in the transmission path, and if the data stored in the payload of the lost frame is one of the divided data, the receiver discards the other divided data divided from the same data. . This is because if even one of the divided data that is a part of the data is lost, the original data cannot be correctly restored even if other received divided data is combined.

For example, in FIG. 4, when the PDU 38 is lost in the transmission path, the receiver divides the SDU 32 from the SDU 31 because the divided SDU 32 stored in the PDU 38 is one of the divided data. When the loss is detected in the transmission path, even if the PDU 42 and the PDU 48 are received, the divided SDU 33 and the divided SDU 34 as the other divided data of the SDU 31 are discarded by the operation described below.

Since the receiver does not have a length identifier in the PDU 42, the receiver determines that only the divided data of the SDU 31 is stored in the PDU 42, discards the divided SDU 33, and outputs the length identifier existing in the PDU 48. 45 (LI
= B), it is detected that the end of the SDU 31 is present in the payload 43, and the divided SDU3 which is the end data is detected.
Discard 4 That is, when the receiver detects that a frame loss has occurred, the receiver discards all the divided SDUs until the end of the data is indicated by the length identifier. The receiver detects that a frame loss has occurred by discontinuity of sequence numbers or the like.

When the transmitter retransmits the lost frame, after discarding, the receiver sends a transmission confirmation frame for requesting the transmitter to retransmit the lost frame and the frame related to the discarded divided data. Send. The transmitter retransmits these frames according to the retransmission request.

[0014]

However, the conventional wireless communication method has the following problems. That is, in FIG. 4, when the PDU 26 is lost in the transmission path, the receiver discards all the divided SDUs until the end of the data is indicated by the length identifier, and thus the PDU 38, PDU 42 and PDU 48 are discarded. When the data is received, it is not affected by the loss of the divided SDU 13 and the divided SD which is the divided data relating to the SDU 31 which does not prevent the data from being restored.
There is a problem that the U32, the divided SDU 33, and the divided SDU 34 are discarded, and even the divided data that should not be discarded is discarded.

When the transmitter retransmits a lost frame, the receiver requests the transmitter to retransmit the discarded divided data after discarding. By discarding such a request, a retransmission request that does not need to be performed and a re-transmission of the divided data in response to the request are performed, causing wasteful traffic and a reduction in transmission efficiency. Here, for convenience, all transmission data (SDU) has been described as not being contained in one payload, but transmission data (SDU) may be contained in one payload and not divided. However, also in this case, the data stored in the payload will be referred to as “divided data (divided SDU)”, and the following description will be made.

[0016] The present invention has been made in view of the above point, and when a frame loss occurs in a transmission path,
Data that is not affected by the data (SDU) that is not affected by the loss and that is not affected by the data (SDU) that is not required to be discarded is discarded. (SD
It is an object of the present invention to provide a wireless communication device and a wireless communication method for preventing the restoration of U) from becoming impossible.

[0017]

The inventor of the present invention has determined that data that should not be originally discarded is discarded when a frame having a length identifier indicating the end of data is lost. The present invention has been found that it is possible to prevent data that does not need to be originally discarded from being discarded by clarifying a data break even in this case. I came to.

That is, the gist of the present invention is that a frame having a length identifier indicating the end of data is added to the end of the data by adding a length identifier indicating the end of the data to the beginning of the data. In the event of loss, it is necessary to make data breaks clear.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A radio communication apparatus according to a first aspect of the present invention is a radio communication apparatus for performing communication using a frame constituted by control information and a payload. Sequence number adding means for adding a sequence number as control information, first identifier adding means for adding a first identifier indicating that the leading end of the payload is the leading end of the transmission data, and transmission data in the payload. And a second identifier adding means for adding, as control information, a second identifier indicating that the end of the data exists.

According to a second aspect of the present invention, there is provided a wireless communication apparatus for performing communication using a frame constituted by control information and a payload. Detecting means for detecting a break in the received data from a first identifier indicating the leading end of the received data and a second identifier indicating the end of the received data, and, when the sequence numbers are continuous, according to the break in the received data. Restoring means for restoring the received data by combining the data stored in the payload,
Is adopted.

[0021] In a wireless communication apparatus according to a third aspect of the present invention, in the second aspect, when the sequence number is discontinuous, the restoring means stores the stored data stored in the payload according to the break of the received data. Is adopted.

According to these configurations, by adding a length identifier indicating the leading end of the data to the payload, it becomes possible to indicate a data break even by the identifier, so that there is no need to discard the data. It is possible to prevent data from being discarded.

A wireless communication terminal device according to a fourth aspect of the present invention employs a configuration in which the wireless communication device according to any one of the first to third aspects is mounted.

A radio communication base station controller according to a fifth aspect of the present invention employs a configuration in which the radio communication apparatus according to any one of the first to third aspects is mounted.

According to these configurations, since a wireless communication apparatus capable of preventing data that should not be originally discarded from being discarded is mounted, the radio communication between the radio communication terminal apparatus and the radio communication base station apparatus is installed. In communication, frame transmission efficiency can be improved.

A wireless communication method according to a sixth aspect of the present invention is the wireless communication method for performing communication using a frame constituted by control information and a payload, wherein the sequence number and the leading end of the payload are the leading end of data. Is communicated using a frame having, as control information, a first identifier indicating the end of data in the payload and a second identifier indicating that the end of the data exists in the payload.

[0027] In a wireless communication method according to a seventh aspect of the present invention, in the wireless communication method for performing communication using a frame composed of control information and a payload, the transmitting side stores transmission data in the payload and transmits the control data as control information. , A sequence number, a first identifier indicating that the leading end of the payload is the leading end of the transmission data, and a second identifier indicating that the end of the transmission data exists in the payload. The receiving side detects a break of the received data from the first identifier indicating the leading end of the received data and the second identifier indicating the end of the received data, and when the sequence numbers are continuous, The received data is restored by combining the stored data stored in the payload according to the break.

[0028] In the wireless communication method according to an eighth aspect of the present invention, in the seventh aspect, when the sequence number is discontinuous, the receiving side can determine whether the sequence number is not continuous according to a break of the received data.
Data stored in the payload is discarded.

According to these methods, by adding a length identifier indicating the leading end of the data to the payload, it is possible to indicate a data break even by the identifier, and it is not necessary to discard the data. It is possible to prevent data from being discarded.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. (Embodiment) A wireless communication apparatus according to an embodiment of the present invention adds a length identifier indicating a data break not only to the end of data but also to the leading end of data.

Hereinafter, a radio communication apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a main block diagram showing a schematic configuration of a wireless communication apparatus according to one embodiment of the present invention. First, the configuration of the transmitter will be described.

In the transmitter 100, the SDU dividing unit 10
1 divides continuously input transmission data into payloads of a fixed length. The SDU tip detection unit 102
When the U dividing section 101 divides transmission data into payloads of a fixed length, the U-divider 101 detects divided data in which the leading end of the payload is the leading end of the data before division. SDU end detection unit 1
03, when the SDU division unit 101 divides the transmission data into payloads of a fixed length, if the end of the data before division is included in the payload, from the beginning of the payload to the end of the data before division. Length "X" is detected.
Here, “X” indicates the length from the leading end of the payload to the end of the transmission data, and is a value that changes according to the length.

The LI adding section 104 adds a length identifier as control information to the leading end of the payload. SN assigning unit 10
5 adds a sequence number and an extension flag indicating the presence or absence of a length identifier as control information to the end of the payload, and transmits the assembled frame (PDU).

Next, the configuration of the receiver will be described.
In receiver 110, SN separation section 111 separates a sequence number from the received frame (PDU) and outputs the sequence number to SDU assembling section 115. LI
The separating unit 112 separates the length identifier and the extension flag from the received frame (PDU), and
It outputs to the U front end detection unit 113 and the SDU end detection unit 114.

The SDU head detecting section 113 detects the head of the received data by the length identifier of “LI = 0” of the length identifiers, and outputs a signal indicating the break of the head of the received data to the SDU assembling section 115. I do. SDU end detection unit 11
4 detects the end of the received data based on the length identifier “LI = X” among the length identifiers, and outputs a signal indicating the end of the received data to the SDU assembling unit 115.

The SDU assembling section 115 obtains the reception data by combining the divided data according to the sequence number and the signal indicating the break of the reception data.

Next, the operation of the wireless communication apparatus having the above configuration will be specifically described with reference to FIG. FIG.
FIG. 3 is a schematic diagram illustrating a frame format used when the wireless communication device having the above configuration performs communication. In FIG. 2, the data before division is “SDU”, the divided data is “SDU”, and the sequence number is “SN”.
, The length identifier as “LI”, and the extension flag as “E”.

First, the operation of the transmitter 100 will be described. Transmission data SDU input to SDU division section 101
The SDU 201, the SDU 221 and the SDU 241 are divided by the SDU dividing unit 101 into payloads having a fixed length.
Here, it is assumed here that the SDU 201 and the SDU 221 are input to the SDU division unit 101 with an interval, and the SDU 221 and the SDU 241 are continuously input to the SDU division unit 101 without an interval.

Since the SDU 201 does not fit into one payload, the divided SDU 20
2 and the remaining divided SDU 204. further,
The divided SDU 204 does not satisfy the payload 206, and the SDU 201 and the SDU 221
Since the data is input to the U dividing unit 101, padding (indicated as “Pad” in FIG. 2) 205 after the divided SDU 204 is filled so as to fill the payload 206.

Next, since the SDU 221 does not fit in one payload, the SDU 221
, The divided SDU 224 satisfying the payload 225, and the remaining divided SDU 226. Further, regarding the divided SDU 226, the divided SDU 226 does not satisfy the payload 227, and
Since the DU 221 and the SDU 241 are continuously input to the SDU division unit 101 without an interval, the payload 22
7, the divided SDU 242 corresponding to the remaining payload length after storing the divided SDU 226 is divided from the SDU 241, and the divided SDU 242 is added to the divided SDU 226. Each of the payloads storing the divided data is sent from the SDU dividing unit 101 to the LI adding unit 104.
Output to

In addition, SDU201, SDU221, SD
When the U241 is divided, the leading end of the payload is set to the SDU 201, SDU 221,
The payload serving as the leading end of the SDU 241 is detected, and a detection signal is output to the LI provision unit 104. Specifically, since the leading end of the payload 203 is the leading end of the SDU 201 and the leading end of the payload 223 is the leading end of the SDU 221, the payload 203 and the payload 223 are detected.

Similarly, SDU201 and SDU22
1. When the SDU 241 is divided,
When the end of DU201, SDU221, and SDU241 is included, the SDU end detection unit 103 detects the SDU201, SDU221, and SDU24 from the leading end of the payload.
The length up to the end of 1 is detected, and the length information “X” is output to the LI provision unit 104. Specifically, since the end of the SDU 201 is included in the payload 206, the division S
The length “a” of the DU 204 is the LI provision unit 1 as the length information.
04 is output. Also, SDU2 is added to the payload 227.
21, the length “b” of the divided SDU 226 is output to the LI provision unit 104 as length information.

Next, the LI adding section 104 adds a length identifier (LI) to the leading end of the payload according to the flowchart shown in FIG.

First, steps (hereinafter, referred to as “ST”)
If the detection signal is output from the SDU tip detection unit 102 to the LI adding unit 104 in 301, ST3
In 02, a length identifier “LI = 0” indicating that the leading end of the payload is the leading end of the transmission data is added to the leading end of the payload by the LI attaching section 104. On the other hand, S
The detection signal from the DU tip detection unit 102 is sent to the LI provision unit 1
04, the length identifier "LI = 0"
Is not added.

Further, when the length information is output from SDU end detecting section 103 to LI adding section 104 in ST 303, LI adding section 1 is output in ST 304.
At the end of the payload, the length identifier “LI =
"X" is added. On the other hand, when the length information is not output from the SDU end detecting unit 103 to the LI adding unit 104, the length identifier “LI = X” is not added.

Specifically, the leading end of the payload 203 is S
Since this is the leading end of the DU 201, a length identifier 207 “LI = 0” is added to the leading end of the payload 203. In addition, since the leading end of the payload 223 is the leading end of the SDU 221, the leading end of the payload 223 has a length identifier 228
“LI = 0” is added.

Further, the SDU 201 is added to the payload 206.
, The length identifier 212 “LI = a”
Is added to the top of the payload 206, and the split SD
The length identifier 213 “LI = Pad” indicating that U204 and subsequent portions are filled with padding is included in the payload 20.
6 is added to the tip. In addition, the payload 227 has SD
Since the end of U221 is included, the length identifier 236 “L
“I = b” is added to the leading end of the payload 227.

By adding the length identifier LI to the payload as described above, the transmission data SDU20
1, the boundaries between SDU 221 and SDU 241 are clearly shown. Then, each payload is output to SN assigning section 105.

Next, a continuous sequence number and an extension flag indicating the presence or absence of a length identifier are added as control information to the end of each payload by the SN assigning section 105, and the payload is assembled.

More specifically, a sequence number 208 “SN = 0” is added to the leading end of the payload 203, and a length identifier 207 following the sequence number 208 exists. Is set to "
Since there is no length identifier following the length identifier 207, the extension flag 210 is set to “E = 0” and added to each. Similarly, at the end of the payload 206, the sequence number 214 and the extension flags 215, 21
6 and 217, and a sequence number 229 and extension flags 230 and 23 are added to the end of the payload 223.
1 is added, a sequence number 233 and an extension flag 234 are added to the leading end of the payload 225, and a sequence number 237 is added to the leading end of the payload 227.
Extension flags 238 and 239 are added. Then, PDU21, which is the five frames assembled, is used.
1, PDU218, PDU232, PDU235, PD
U240 is transmitted from transmitter 100.

As described above, the transmission data is divided into a payload of a fixed length, and the length identifier L
The control information such as I is added, the frame is assembled, and transmitted from the transmitter 100.

Next, the operation of the receiver 110 will be described. Here, it is assumed that the PDU 218 having the length identifier 212 “LI = a” indicating the end of the SDU 201 has been lost in the transmission path in the middle of transmission and has not been received by the receiver 110.

First, in the SN separation section 111, the received frame PDU 211, PDU 232, PDU 235, PDU
From 240, the sequence numbers are separated and those sequence numbers are output to SDU assembling section 115. Then, the frame after the sequence number separation is performed by the LI separation unit 1.
12 is output.

Next, the LI separation unit 112
11, the presence / absence of a length identifier is determined from the PDU 232, PDU 235, and PDU 240 according to the setting of the extension flag E, and the length identifier is separated. The extension flag is also separated. And the separated length identifier is the SDU
It is output to the leading end detecting unit 113 and the SDU end detecting unit 114. Specifically, the length identifier 207 “LI = 0” indicating the head of the SDU 201, the length identifier 228 “LI = 0” indicating the head of the SDU 221 and the length identifier 236 “LI = b” indicating the end of the SDU 221 Is output to the SDU leading end detecting unit 113 and the SDU end detecting unit 114. Further, the frame in which the length identifier and the extension flag are separated is only the payload, and the payloads 203 and 22
3, 225 and 227 are output to the SDU assembling section 115.

Next, the SDU leading end detection unit 113 uses the length identifier “LI = 0” of the length identifiers to store the SD
The leading end of U is detected, and a signal indicating the break of the leading end of SDU is output to SDU assembling section 115. The SDU end detecting unit 114 detects the end of the SDU based on the length identifier “LI = X” of the length identifiers, and outputs a signal indicating the end of the SDU to the SDU assembling unit 115. . Specifically, first, the SDU leading end detection unit 113 outputs a signal indicating a break of the leading end of the SDU according to the length identifier 207 “LI = 0”, and then, according to the length identifier 228 “LI = 0”. A signal indicating the end of the SDU is output, and then the SDU end detector 11
4, the SDU according to the length identifier 236 “LI = b”
Is output.

In the SDU assembling section 115, the payload output from the LI separation section 112 is temporarily stored until a signal indicating the end of the SDU is output from the SDU end detection section 114, and the stored payload is The continuity of the sequence numbers is checked. Specifically, when the payload 227 is output from the LI separation unit 112, a signal indicating the end of the SDU is output from the SDU end detection unit 114.
23, 225 and 227 are temporarily stored in the SDU assembling section 115.

Then, the SDU assembling section 115 checks the continuity of the sequence numbers of the stored payload, and checks whether or not a lost frame has occurred. If they are continuous, it is determined that there is no lost frame, and the divided data is combined according to the SDU break to obtain received data. On the other hand, if they are discontinuous, it is determined that a lost frame has occurred, and other divided SDUs divided from SDUs that cannot be assembled without the divided SDUs included in the lost frame according to the SDU breakpoints Is discarded. Specifically, since the sequence number 208 and the sequence number 229 are discontinuous, the divided SDU 202 is discarded according to the SDU break. Further, since the sequence number 229, the sequence number 233, and the sequence number 237 are continuous, the divided SDU 222, the divided SDU 224, and the divided SDU
226 are combined to obtain received data.

The operation of the wireless communication device according to the present embodiment as described above will be described below in comparison with the operation of the above-described conventional wireless communication device.

That is, in the above-described conventional radio communication apparatus, since only the length identifier indicating the end of the transmission data is added at the transmitter, the break of the reception data is determined by the end of the data at the receiver. There was only. Therefore, when the discontinuity of the sequence number is detected, the receiver discards the divided data from the end of the data to the end of the next data.

However, in the wireless communication device according to the present embodiment, since the transmitter also adds the length identifier indicating the leading end of the transmission data, the receiver sets the boundary of the received data by the leading end of the data. You can judge. Therefore, when the discontinuity of the sequence number is detected, the receiver discards the divided data from the end of the data to the start of the next data.

More specifically, in the above-described conventional radio communication apparatus, in FIG. 2, when the PDU 218 having the length identifier 212 “LI = a” indicating the end of the data is lost on the transmission line during transmission, , The data break is set to the length identifier 236 “LI = b” indicating the end of the data.
I had no choice but to judge. Therefore, the divided SDU
202, divided SDU 222, divided SDU 224, divided S
DU 226 will be discarded and the lost split SD
SDU2 that cannot be assembled without U204
01, a divided SDU 222 that is not a part of 01, and a divided SDU 22
4. As a result of discarding even the divided SDU 226, the divided SD
SDU221 unaffected by U204 loss
Could not be assembled.

However, in the wireless communication apparatus according to the present embodiment, in FIG. 2, even if the PDU 218 having the length identifier 212 “LI = a” indicating the end of the data is lost on the transmission line during transmission. , A data break is set to a length identifier 228 “L
It can also be determined by "I = 0". For this reason,
Only the split SDU 202 will be discarded, and the split SDU 202
The DU 222, the divided SDU 224, and the divided SDU 226 are not discarded. Therefore, in the SDU assembling section 115, S
Length identifier 228 indicating the leading end of DU 221 "LI = 0"
, The length identifier 23 indicating the end of the SDU 221
6 With the location indicated by “LI = b” as the end,
22, the divided SDU 224 and the divided SDU 226 can be combined to construct the SDU 221 which is not affected by the loss of the divided SDU 204.

As described above, according to the wireless communication apparatus of the present embodiment, by adding the length identifier indicating the leading end of the data to the payload, it is possible to indicate the data break by the identifier. Therefore, it is possible to prevent data that should not be originally discarded from being discarded.

The radio communication device according to the above embodiment is
The present invention can be applied to a wireless communication terminal device and a wireless communication base station control device in a wireless communication system. Therefore, in wireless communication between the wireless communication terminal device and the wireless communication base station device, the frame transmission efficiency can be improved.

[0065]

As described above, according to the present invention,
When a frame loss occurs in the transmission path, the data (SDU) that is not affected by the loss and that is not affected by the restoration of the data (SDU) is also discarded even if it is not necessary to discard the divided data (divided SDU). This can prevent the data (SDU) that is not affected by the above from being restored.

[Brief description of the drawings]

FIG. 1 is a main block diagram showing a schematic configuration of a wireless communication device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram showing a frame format used when the wireless communication device according to one embodiment of the present invention performs communication;

FIG. 3 is a block diagram illustrating L of the wireless communication apparatus according to the embodiment of the present invention;
Operation flowchart for explaining the operation of the I providing unit

FIG. 4 is a schematic diagram showing a frame format used when a conventional wireless communication device performs communication.

[Explanation of symbols]

 Reference Signs List 101 SDU dividing unit 102 SDU leading end detecting unit 103 SDU end detecting unit 104 LI attaching unit 105 SN attaching unit 111 SN separating unit 112 LI separating unit 113 SDU leading end detecting unit 114 SDU end detecting unit 115 SDU assembling unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K028 AA15 BB04 MM08 MM12 PP04 PP22 RR04 5K030 GA12 HB11 JL01 LA01 LC18 MA04 MB13 5K035 AA03 BB01 CC08 DD01 EE01 JJ01 LL01 5K067 AA21 BB21 DD17 DD51 EE02 H23 KK

Claims (8)

[Claims] 1. A wireless communication apparatus for performing communication using a frame composed of control information and a payload, a storage unit for storing transmission data in a payload, a sequence number adding unit for adding a sequence number as control information, A first identifier adding unit that adds, as control information, a first identifier indicating that the leading end of the payload is the leading end of the transmission data; and a second identifier indicating that the end of the transmission data exists in the payload. And a second identifier adding means for adding the identifier. 2. A wireless communication apparatus for performing communication using a frame constituted by control information and a payload, a determining unit for determining continuity of sequence numbers, a first identifier indicating a leading end of received data, Detecting means for detecting a break of the received data from the second identifier indicating the end of the data, and combining the stored data stored in the payload according to the break of the received data when the sequence numbers are continuous. A wireless communication device comprising: a recovery unit configured to recover received data. 3. The wireless communication apparatus according to claim 2, wherein when the sequence numbers are discontinuous, the restoration unit discards the stored data stored in the payload according to a break of the received data. 4. A wireless communication terminal device comprising the wireless communication device according to claim 1. 5. A wireless communication base station control device comprising the wireless communication device according to claim 1. 6. A wireless communication method for performing communication using a frame constituted by control information and a payload, comprising: a sequence number; a first identifier indicating that a leading end of the payload is a leading end of data; A wireless communication method characterized by performing communication using a frame having, as control information, a second identifier indicating that a data end exists. 7. A wireless communication method for performing communication using a frame composed of control information and a payload, wherein a transmitting side stores transmission data in a payload, and a sequence number and a leading end of the payload are transmitted data as control information. And a second identifier indicating that the end of the transmission data is present in the payload, and the receiving side transmits a frame indicating the front end of the reception data. 1 and the second identifier indicating the end of the received data, a break in the received data is detected. If the sequence numbers are continuous, the stored data stored in the payload is stored according to the break in the received data. A wireless communication method characterized in that the received data is restored by combining the methods. 8. The wireless communication method according to claim 7, wherein, when the sequence numbers are discontinuous, the receiving side discards the stored data stored in the payload according to a break of the received data.