CN101932008A

CN101932008A - Automatic repeat method and device

Info

Publication number: CN101932008A
Application number: CN2009101494968A
Authority: CN
Inventors: 吴起; 郑旭峰; 王海; 仲川; 周雷; 赵铮
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2009-06-25
Filing date: 2009-06-25
Publication date: 2010-12-29

Abstract

The invention discloses an automatic repeat method. After a sender acquires the information of all automatic repeat request (ARQ) blocks which requires the initiation of repeat, for each ARQ block, the method comprises the following steps of: dividing the ARQ block into a plurality of sub-blocks according to the size of the ARQ block; and selecting at least one sub-block for the repeat in a media access controller protocol data unit (MAC PDU) according to the ascending number sequence of the sub-block until the repeat of all the sub-blocks of the ARQ block is completed. The invention also discloses an automatic repeat device. The device comprises a sub-block dividing module, a packaging repeat module and a header setting module. The automatic repeat method and the automatic repeat device provided by the embodiment of the invention realize data repeat and obviously reduce occupied system resources in an MAC PDU header.

Description

A kind of method and apparatus of autonomous retransmission

Technical field

The present invention relates to mobile communication technology, be specifically related to a kind of method and apparatus of automatic re-transmission.

Background technology

In mobile communication system, after transmission is sent to the recipient and sends packet, when transmit leg is received negative feedback message from the recipient--as NACK or NAK message, perhaps in system's official hour, do not receive any feedback message, mean that this packet may lose in transport process, therefore need to trigger retransmission processes, the packet of losing is retransmitted, the described packet of losing is commonly referred to automatic repeat requests (Auto Repeat Request, ARQ) piece is because the ARQ piece is generally a plurality of, therefore, each ARQ piece corresponding to a block number (Block Serial Number, BSN).

Under the framework of existing protocol regulation, following two kinds of methods can be arranged usually during re-transmission:

One, monoblock retransmits: this method is that the ARQ piece of losing is not resend one time with not doing any change.

Two, rearrange rear re-transmission: the ARQ piece that this method will be lost is divided into a plurality of sub-blocks, one or more sub-blocks are formed a medium access control sublayer protocol Data Unit (Media AccessController Protocol Data Unit, MAC PDU) to be retransmitted.According to the size of ARQ piece, the sub-piece that ARQ piece is divided into may be formed one or more MAC PDU.

The method of first kind of monoblock re-transmission is comparatively simple, and does not need the ARQ piece that retransmits is carried out operation bidirectional, and this paper no longer specifically introduces.

Rearrange the method that the back retransmits for second kind, because the ARQ piece can be for a plurality of, and after an ARQ piece was divided into a plurality of sub-pieces, described a plurality of sub-pieces further may need a plurality of MAC PDU to retransmit again.Therefore, need to identify what comprise among this MAC PDU in the header of each MAC PDU is sub-block in which ARQ piece, and what comprise among this MAC PDU is which sub-block in this ARQ piece.Current, the mapping structure of the header of described MAC PDU as shown in Figure 1, for ease of describing, only show the sign position relevant among Fig. 1 with this paper, understand easily, the content of clipped should be conspicuous to those skilled in the art among Fig. 1, comprises at least in the header of described MAC PDU:

The BSN flag: the value representation of this flag is by the block number of the corresponding ARQ piece of each sub-block of this MAC PDU transmission;

SUB_SN: in each sub-piece that the value of this sign position equals to comprise among this MAC PDU, the sub-block number of the sub-piece that numbering is minimum;

Last: this sign position is effectively the time, represents to include last height piece of the ARQ piece of described each sub-piece correspondence in each sub-piece that this MAC PDU comprises; And when should sign position invalid, then represent in each sub-piece that this MAC PDU comprises, do not comprise last height piece of the ARQ piece of described each sub-piece correspondence.

For instance, suppose in certain data transmission procedure, block number is the ARQ lost block of k, suppose when using MAC PDU to retransmit, this ARQ piece is divided into 6 sub-pieces again, establishes it and is numbered #0～#5, and per three sub-pieces are formed a MAC PDU and retransmitted, then sending 6 sub-pieces needs two MAC PDU altogether, is called MAC PDU#1 and MAC PDU#2;

1, transmit leg three sub-pieces that will be numbered #0～#2 send to the recipient in the middle of being included in MAC PDU#1; At this moment, in the header of MAC PDU#1:

1) it is resulting that each sub-block that retransmits all is that block number is that the ARQ piece of k is repartitioned, and therefore, the BSN flag is k;

2) for MAC PDU#1 and since comprising each sub-piece in, sub-block number minimum be 0, therefore, at this moment, SUB_SN sign position is 0;

3) for MAC PDU#1 and since comprising sub-block be #0～#2, do not comprise last sub-block (being sub-block #5) of this ARQ piece, therefore, at this moment, the Last flag is invalid, usually represents with 0.

2, transmit leg three sub-pieces that will be numbered #3～#5 send to the recipient in the middle of being included in MAC PDU#2; Comparison A obtains easily, at this moment, and in the header of MAC PDU#2:

1) the BSN flag is k;

2) for MAC PDU#2 and since comprising each sub-piece in, sub-block number minimum be 3, therefore, at this moment, SUB_SN sign position is 3;

3) for MAC PDU#2 and since comprising sub-block be #3～#5, comprise last sub-block (being sub-block #5) of this ARQ piece, therefore, at this moment, the Last flag is effective, usually represents with 1.

As seen, the recipient is after receiving MAC PDU, by above-mentioned 3 the sign positions in the header, the numbering of the pairing ARQ piece of the sub-piece that can clearly wherein comprise and each sub-piece, needing to obtain the whole ARQ piece of re-transmission thereby each sub-piece can be combined in order, realize retransmitting automatically.

Yet this method also exists certain defective: the header resource-constrained of MAC PDU, and when data re-transmission, prior art need all be added BSN and SUB_SN sign position in the header of each MAC PDU.For a data transfer, in order to identify each data block of transmission, then need the data block transmitted more many, the block number of last data block (being BSN) nature will be more big; Further, because the ARQ piece that need to retransmit may be any data block in the data transfer, therefore adding the bit that the BSN flag in the MAC PDU header takies to will be more many, thereby takies more resource; Simultaneously, in the header of each MAC PDU, all add SUB_SN and also can cause too much taking of resource.As seen, in the existing repeating method, the expense of system resource is too big.

Summary of the invention

The embodiment of the invention provides a kind of method and apparatus of automatic re-transmission, and is less in the system resource of carrying out need taking when data block retransmits.

For achieving the above object, technical scheme of the present invention specifically is achieved in that

A kind of method of autonomous retransmission, transmit leg is after the information of obtaining all HARQ ARQ pieces that need the initiation re-transmission, and to each ARQ piece, this method comprises:

According to this ARQ block size it is reclassified as several sub-blocks;

According to the ascending order of sub-block numbering, select at least one sub-block to be included among the medium access control sublayer protocol Data Unit MAC PDU at every turn and retransmit, until retransmit all sub-blocks of this ARQ piece complete;

Wherein, comprise in the header of the MAC PDU at first of each ARQ piece sub-piece place:

The first sign position: in each sub-piece that this MAC PDU comprises, when including the sub-piece of first of ARQ piece of described each sub-piece correspondence, this sign position effectively; In each sub-piece that this MAC PDU comprises, when not comprising the sub-piece of first of ARQ piece of described each sub-piece correspondence, this sign position is invalid;

Second flag: in each sub-block that this MAC PDU comprises, when including last sub-block of ARQ piece corresponding to described each sub-block, this flag is effective; In each sub-block that this MAC PDU comprises, when not comprising last sub-block of ARQ piece corresponding to described each sub-block, this flag is invalid;

The 3rd flag: identify the corresponding ARQ piece of each sub-block of current re-transmission, and each ARQ piece unique corresponding the 3rd flag in retransmitting flow process;

The 4th flag: the block number that identifies the corresponding ARQ piece of each sub-block that this MAC PDU comprises;

Do not comprise the MAC PDU of each first sub-block of ARQ piece, comprise in its header: first, second, and third flag, and the 5th flag;

Described the 5th sign position: identify in each the sub-piece that comprises among this MAC PDU the block number of the sub-piece that numbering is minimum.

After sending current MAC PDU, send before the next MAC PDU, this method further comprises:

If receive the successful feedback message of affirmation reception that the recipient returns, then proceed the transmission of next MAC PDU; Otherwise, proceed the transmission of next MAC PDU after the sub-block that comprises among the current MAC PDU recorded.

This method further comprises:

After finishing the re-transmission of all sub-blocks, the sequencing of sub-block when retransmitting first that comprises among each MAC PDU according to record, the sub-block that needs are retransmitted again is included in the method that retransmits among the MAC PDU according to described at least one sub-block of each selection and again sends, until all sub-blocks that will need again to retransmit retransmit complete;

If the sub-piece that still has not success to send after sending once more, repeat the sequencing of sub-piece when retransmitting first that comprises among described each MAC PDU according to record, the sub-piece that needs are retransmitted once more is included in the method that retransmits among the MAC PDU according at least one height piece of described each selection and sends once more, retransmit the step that finishes up to all sub-pieces that will need to retransmit once more, until all sub-pieces are all successfully sent to the recipient, finish to retransmit flow process.

A kind of device of automatic re-transmission, this device comprises:

The partition module is used for to each ARQ piece, according to this ARQ block size it being reclassified as several sub-blocks after the information of obtaining all HARQ ARQ pieces that need the initiation re-transmission;

The encapsulation retransmission module, be used for each the ARQ piece after repartitioning, according to the ascending order of each sub-block number in this ARQ piece, at least one height piece packing of each selection is packaged into a MAC PDU and accepts header the setting of module to its header is set, the MAC PDU that setting is finished retransmits, and retransmits up to all the sub-pieces with this ARQ piece to finish;

Header arranges module, is used for each MAC PDU that encapsulation retransmission module encapsulation packing obtains is carried out the header setting; Wherein, the header to the MAC PDU at first sub-block place of each ARQ piece arranges:

Header for the MAC PDU of first sub-block that does not comprise this ARQ piece then arranges first, second, and third flag, and the 5th flag:

This device also comprises:

Retransmit the sub-block logging modle, be used for after the encapsulation retransmission module is finished the transmission of a MAC PDU, wait for and receive the feedback message that returns from the recipient, if receive the successful feedback message of affirmation reception that the recipient returns, then notice encapsulation retransmission module is proceeded the transmission of next MAC PDU; Otherwise, after the sub-block that comprises among this MAC PDU recorded, reinform the transmission that the encapsulation retransmission module is proceeded next MAC PDU.

This device also comprises:

Judge module is used to receive the notice of encapsulation retransmission module, judges after this that finish all sub-pieces retransmits, and retransmits the sub-piece that the needs that whether have record in the sub-piece logging modle retransmit once more, if having, and notice encapsulation retransmission module;

Retransmit sub-piece logging modle, the information notice judge module of the sub-piece that the needs that are further used for self whether having record retransmit once more;

The encapsulation retransmission module, be further used for notice judge module after once re-transmission is finished, receive the notice of judge module afterwards, according to the information that retransmits each the sub-piece that writes down in the sub-piece logging modle, according to its sequencing when retransmitting first, the sub-piece that needs are retransmitted once more is included in the method that retransmits among the MAC PDU according at least one height piece of described each selection and sends once more, and notifies judge module once more after transmission finishes.

As seen from the above technical solutions, the method and apparatus of the automatic re-transmission that the embodiment of the invention provides, by in the header of the MAC PDU that comprises first sub-piece of ARQ piece, use bit expense first, the three sign position suitable to replace SUB_SN with SUB_SN of the prior art; And in the header for the MAC PDU that does not comprise first sub-piece of ARQ piece, use the first, the 3rd sign position to replace BSN of the prior art, and the bit expense of BSN is much larger than the bit expense sum of the first, the 3rd sign position, thereby when realizing data re-transmission, the system resource that remarkable minimizing need take.

Description of drawings

Fig. 1 is for carrying out the ARQ piece when retransmitting by MAC PDU in the prior art, the mapping structure schematic diagram of MAC PDU header.

Fig. 2 is the schematic flow sheet of the method for autonomous retransmission in the embodiment of the invention.

Fig. 3 comprises the mapping structure schematic diagram of the MAC PDU header of first sub-block in the ARQ piece for carrying out the ARQ piece when retransmitting by MAC PDU in the embodiment of the invention.

Fig. 4 does not comprise the mapping structure schematic diagram of the MAC PDU header of first sub-piece of ARQ piece for carrying out the ARQ piece when retransmitting by MAC PDU in the embodiment of the invention.

Fig. 5 is the composition structural representation of the automatic device that retransmits in the embodiment of the invention.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

The embodiment of the invention provides a kind of method of autonomous retransmission, and transmit leg to each ARQ piece, is carried out respectively following steps after the information of obtaining all ARQ pieces that need to initiate retransmit, its flow process as shown in Figure 2, comprising:

Step 201: it is reclassified as several sub-blocks according to each ARQ block size;

Concrete method of dividing can be carried out according to the size of the sub-piece of stipulating in the size of ARQ piece and the communication system, does not do concrete qualification in the embodiment of the invention.

Step 202: according to the ascending order of sub-block numbering, select at least one sub-block to be included among the MAC PDU at every turn and retransmit, until retransmit all sub-blocks of this ARQ piece complete.Wherein, the sub-block number that comprises among each MAC PDU needn't equate, and the embodiment of the invention is not done concrete restriction to the sub-block number that comprises among the MAC PDU; In addition, the composition structure of the header of the MAC PDU at each sub-block place can further be divided into two classes:

The mapping structure of the header of A, first MAC PDU (the MAC PDU that promptly comprises first sub-piece of ARQ piece) as shown in Figure 3, comprising:

First identifies the position: this sign position is the new sign position of introducing of the embodiment of the invention, when this sign position is effective, represent in each sub-piece that this MAC PDU comprises, first the sub-piece (promptly in the sub-piece that this ARQ is divided into, the sub-piece of that of sub-block number minimum) that includes the ARQ piece of described each sub-piece correspondence; And when should sign position invalid, then represent in each sub-piece that this MAC PDU comprises, do not comprise first sub-piece of the ARQ piece of described each sub-piece correspondence.

The RSN flag: this flag also is the new flag of introducing of the embodiment of the invention, its value is a flowing water sequence number, be used for identifying the corresponding ARQ piece of each sub-block (i.e. this MACPDU comprise ARQ piece corresponding to each sub-block) of current re-transmission, each ARQ piece is a unique corresponding RSN in retransmitting flow process; For example: having 5 ARQ pieces needs to retransmit, and then for first ARQ piece, its each sub-block that marks off is when retransmitting by MAC PDU, and the RSN value in the header of the MAC PDU at each sub-block place is all identical, such as being 0; To second ARQ piece, its RSN can be 1; To the 3rd ARQ piece, its RSN is 2, by that analogy.

Also comprise BSN flag and Last flag in the header of described first MAC PDU, concrete meaning is same as the prior art, repeats no more.

B, second are to the mapping structure of the header of last MAC PDU (each MAC PDU that does not namely comprise first sub-block of ARQ piece) as shown in Figure 4, comprising: First flag, RSN flag, SUB_SN flag and Last flag, the concrete meaning of each flag is with identical described in prior art and the A.

Owing to losing of MAC PDU may occur in the retransmission processes, therefore once retransmit and possibly described ARQ piece successfully can't be sent to the recipient, thereby need to again retransmit, at this moment, after sending current MAC PDU, send before the next MAC PDU, this method further comprises:

Step 2021: if receive the successful feedback message of affirmation reception that the recipient returns, then proceed the transmission of next MAC PDU; Otherwise, proceed the transmission of next MAC PDU after the sub-block that comprises among the current MAC PDU recorded.

Wherein, described affirmation receives successful feedback message and is generally ACK message, if receive ACK message, then carries out the transmission of next MAC PDU; Otherwise, when NACK or the NAK message of receiving that expression takes defeat, perhaps when the agreement in setting time does not receive any feedback message, proceed the transmission of next MAC PDU after then the sub-block that comprises among the current MAC PDU being recorded.

Understand easily, the sub-block that comprises among the MAC PDU that is recorded is exactly the data of lost part during this retransmits, and the described MAC PDU that is recorded may have one or more, and therefore, after the first re-transmission of finishing all sub-blocks, this method also further comprises:

Step 203: the sequencing of sub-block when retransmitting first that comprises among each the MAC PDU according to record, the sub-block that needs are retransmitted again sends again according to select at least one sub-block to be included in the method that retransmits among the MAC PDU described in the step 202 at every turn; Simultaneously, similar with step 2021, between former and later two MAC PDU, if returning, the recipient confirms to receive successful feedback message, then proceed the transmission of next MAC PDU; Otherwise, proceed again the transmission of next MAC PDU after earlier current MAC PDU being recorded.

Step 204: after step 203 was carried out once, if the sub-block that still has not success to send, then repeated execution of steps 203, until the sub-block that comprises among all MAC PDU is all successfully sent to the recipient, finished to retransmit flow process.

In addition, need to prove, the embodiment of the invention is that the re-transmission with an ARQ piece is that object carries out flow process and describes, repeating method for a plurality of ARQ pieces, because it is different that time delay situation, network condition and agreement are stipulated, the method that many kinds of specific implementations can be arranged, such as for each ARQ piece, flow process according to step 201～203 retransmits up to this piece is successfully sent to the recipient, also can carry out order for all ARQ pieces and send, finish once the more sub-piece of losing in the process of transmitting is retransmitted after the transmission; Perhaps in agreement, stipulate after the several ARQ pieces of every transmission; whether need re-transmission once to feed back to these several ARQ pieces; then retransmit if desired; otherwise proceed the transmission of follow-up data etc.; as space is limited; can't enumerate one by one herein; but those skilled in the art should understand that; no matter adopt which kind of mode; with regard to the re-transmission flow process of wherein each ARQ piece; all meet this repeating method that the embodiment of the invention proposes, thereby also all belong within the protection range that the present invention contains.

For further specifying the implementation of the embodiment of the invention, below in conjunction with a concrete examples of applications described step 201～203 are elaborated, it is pointed out that this example only for showing and spirit of the present invention being described, should not be construed as the qualification to embodiment of the present invention:

Be located in certain data transmission procedure, block number is the ARQ lost block of k, need to retransmit, and then in step 201, transmit leg is that the ARQ piece of k is reclassified as 14 sub-blocks with block number, and its sub-block numbering is respectively 0～13;

In step 202, establish per 3 sub-blocks and form a MAC PDU, then amounting to needs 5 MAC PDU can send all 14 sub-blocks, for ease of describing, described 5 MAC PDU is called MAC PDU#0～MAC PDU#4 successively;

According to the ascending order of sub-block numbering, send earlier the MAC PDU#0 of 3 sub-blocks compositions of sub-block numbering 0～2 for the first time, at this moment, comprise in the header of MAC PDU#0:

The First flag: owing to include first sub-block of described ARQ piece among the MAC PDU#0, therefore this moment, this flag was effective, for example was 1;

RSN identifies the position: need to retransmit this moment has only an ARQ piece, and the RSN value can be any, such as being 0;

The BSN flag: needing the block number of the ARQ piece of re-transmission is k, so the value of BSN flag is k;

The Last flag: do not comprise last sub-block of described ARQ piece among first MAC PDU, therefore this moment, this flag was invalid, for example was 0.

In step 2021, establish MAC PDU#0 send after the recipient receive success, then the receive direction transmit leg returns one and confirms to receive successful feedback message, after transmit leg receives this feedback message, proceeds the transmission of next MAC PDU;

Next send the process of MAC PDU#1～MAC PDU#4, all similar with the process that sends MAC PDU#0, difference only is that the identification information that comprises in the header of MAC PDU#1～MAC PDU#4 is different with MAC PDU#0, below specifies:

A, for MAC PDU#1, it comprises sub-block number is 3 sub-pieces of 3～5, comprises in its header:

The First flag: do not comprise first sub-block among the MAC PDU#1, so this flag being invalid, for example is 0;

The RSN flag: because the sub-block that sends among the sub-block of its transmission and the MAC PDU#0 belongs to same ARQ piece, so its value is identical with value among the MAC PDU#0;

The SUB_SN flag: in 3 sub-blocks that comprise among the MAC PDU#1, what the sub-block numbering was minimum is 3, so the value of SUB_SN flag is 3;

The Last flag: do not comprise last sub-block among the MAC PDU#1, so this flag being invalid, for example is 0.

B, for MAC PDU#2, it comprises sub-block and is numbered 3 sub-blocks of 6～8, the First flag that comprises in its header, RSN flag and Last flag are all identical with MAC PDU#1, and in 3 sub-blocks that comprise among the MAC PDU#2, what the sub-block numbering was minimum is 6, so the value of its SUB_SN flag is 6.

C, for MAC PDU#3, it comprises sub-block and is numbered 3 sub-blocks of 9～11, the First flag that comprises in its header, RSN flag and Last flag are all identical with MAC PDU#1, and in 3 sub-blocks that comprise among the MAC PDU#3, what the sub-block numbering was minimum is 9, so the value of its SUB_SN flag is 9.

D, for MAC PDU#4, it comprises sub-block and is numbered 2 sub-blocks of 12～13, the First flag that comprises in its header is all identical with MAC PDU#1 with the RSN flag, and in 2 sub-blocks that comprise among the MAC PDU#4, what the sub-block numbering was minimum is 12, so the value of its SUB_SN flag is 12; Simultaneously, owing to comprise last sub-block of described ARQ piece among the MAC PDU#4, so its Last flag is effective, for example is 1.

Suppose after sending MAC PDU#0～4, transmit leg is noted MAC PDU#0, MACPDU#2 and is lost in retransmission processes, represent that then sub-block number is that 0,1,2,6,7 and 8 sub-piece needs retransmit once more, then after, transmit leg is proceeded to retransmit for the second time:

Earlier sub-block being numbered three sub-blocks of 0,1,2 is included among the MAC PDU#6 and sends, sub-block being numbered three sub-blocks of 6,7,8 is included among the MAC PDU#7 and sends again, and each flag in the MAC PDU#6 header is identical with each flag value in the MAC PDU#0 header, and each flag in the MAC PDU#7 header is then identical with each flag value in the MAC PDU#2 header.

If through retransmitting for the second time, MAC PDU#6 goes out again active, be that sub-block 0,1,2 does not successfully send, then transmit leg is proceeded to retransmit for the third time, sub-block is numbered three sub-blocks of 0,1,2 is included among the MAC PDU#8 and sends, and each flag in the MAC PDU#8 header is all identical with each flag value in MACPDU#0 or the MAC PDU#6 header.

If through this re-transmission, sub-block 0,1,2 successfully sends to the recipient, then retransmit flow process and finish, otherwise proceed to retransmit until the recipient receives success.Certainly, also can set a maximum retransmission, after retransmitting certain number of times, no matter whether the recipient successfully receives, and stops retransmission operation.This part content belongs to known technology well known to those skilled in the art, no longer describes in detail.

The embodiment of the invention also provides a kind of device of autonomous retransmission, the structure of this device as shown in Figure 5, comprising partition module 510, encapsulation retransmission module 520 and header arrange module 530;

Partition module 510 is used for to each ARQ piece, according to this ARQ block size it being reclassified as several sub-blocks after the information of obtaining all ARQ pieces that need the initiation re-transmission;

Encapsulation retransmission module 520 is used for each the ARQ piece after repartitioning, according to the ascending order of each sub-block number in this ARQ piece, each select at least one height piece packing to be packaged into a MACPDU and accept header the setting to its header in the module 530 is set, the MACPDU that setting is finished retransmits, and retransmits up to all the sub-pieces with this ARQ piece to finish;

Header arranges module 530 and carries out the header setting for each MACPDU that the 520 encapsulation packings to the encapsulation retransmission module obtain; Header to the MAC PDU at first sub-block place of each ARQ piece arranges first, second, third and fourth flag, wherein,

And for the header of the MAC PDU of first sub-block that does not comprise this ARQ piece, first, second, and third flag is set then, and the 5th flag;

The 5th sign position: identify in each the sub-piece that comprises among this MAC PDU the block number of the sub-piece that numbering is minimum.

Preferably, also comprise in this device and retransmit sub-block logging modle 540, be used for after encapsulation retransmission module 520 is finished the transmission of a MAC PDU, wait for and receive the feedback message that returns from the recipient, if receive the successful feedback message of affirmation reception that the recipient returns, then notice encapsulation retransmission module 520 is proceeded the transmission of next MAC PDU; Otherwise, after the sub-block that comprises among this MAC PDU recorded, reinform the transmission that encapsulation retransmission module 520 is proceeded next MAC PDU.

Preferably, this device also comprises judge module 550, is used to receive the notice of encapsulation retransmission module 520, judgement is after this re-transmission of finishing all sub-pieces, retransmit the sub-piece that the needs that whether have record in the sub-piece logging modle 540 retransmit once more, if having, notice encapsulation retransmission module 520;

Correspondingly, retransmit the information notice judge module 550 of the sub-block that needs that sub-block logging modle 540 is further used for self whether having record retransmit again;

Simultaneously, encapsulation retransmission module 520 is further used for notice judge module 550 after once re-transmission is finished, receive the notice of judge module 550 afterwards, according to the information that retransmits each sub-piece of record in the sub-piece logging modle 540, according to its sequencing when retransmitting first, the sub-piece that needs are retransmitted once more is included in the method that retransmits among the MAC PDU according at least one height piece of described each selection and sends once more, and notifies judge module 550 once more after transmission finishes.

In embodiments of the present invention, for a plurality of sub-piece that an ARQ piece marks off, comprise in the header of MAC PDU of first sub-piece, use RSN sign position and First sign position to replace SUB_SN:First sign of the prior art position to need a bit, the bit that RSN sign position needs usually is also less, so its resource overhead and SUB_SN are basic identical; And for other MACPDU, use RSN sign position and First sign position to replace BSN of the prior art in its header: because the bit of BSN needs to hold the block number of all data blocks, and RSN sign position only need hold the sequence number of the ARQ piece that need retransmit, therefore the bit of RSN sign bit stealing is far smaller than BSN, and First sign position only needs to take a bit simultaneously.Therefore, in general, the method and apparatus of the autonomous retransmission that the employing embodiment of the invention provides can be when realizing data re-transmission, the system resource that remarkable minimizing need to take.

In addition, the above is preferred embodiment of the present invention only, is not to be used to limit spirit of the present invention and protection range, and equivalent variations that any those of ordinary skill in the art made or replacement all should be considered as being encompassed within protection scope of the present invention.

Claims

1. the method for an autonomous retransmission, transmit leg, is characterized in that this method comprises to each ARQ piece after obtaining the information that needs to initiate all HARQ ARQ pieces of retransmitting:

According to this ARQ block size it is reclassified as several sub-blocks;

2. method according to claim 1 is characterized in that, after sending current MAC PDU, sends before the next MAC PDU, and this method further comprises:

If receive the successful feedback message of affirmation reception that the recipient returns, then proceed the transmission of next MACPDU; Otherwise, proceed the transmission of next MAC PDU after the sub-block that comprises among the current MAC PDU recorded.

3. method according to claim 2 is characterized in that, this method further comprises:

4. the device of an autonomous retransmission is characterized in that, this device comprises:

5. device according to claim 4 is characterized in that, this device also comprises:

6. device according to claim 5 is characterized in that, this device also comprises: