CN104796233A - Retransmitting method and communication equipment for retransmission - Google Patents
Retransmitting method and communication equipment for retransmission Download PDFInfo
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- CN104796233A CN104796233A CN201510188952.5A CN201510188952A CN104796233A CN 104796233 A CN104796233 A CN 104796233A CN 201510188952 A CN201510188952 A CN 201510188952A CN 104796233 A CN104796233 A CN 104796233A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1838—Buffer management for semi-reliable protocols, e.g. for less sensitive applications such as streaming video
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
Abstract
The invention describes a retransmitting method and communication equipment for retransmission. The method includes: enabling a protocol layer (136) in receiving equipment (102) to receive a data block (1001) transmitted from a corresponding protocol layer (126) in transmitting equipment (104); in the step of (305), confirming that the data block cannot be decoded; in the step of (315), confirming that the possibility that the data block can be decoded is quite low even if the corresponding protocol layer in the transmitting equipment transmits the data block to the protocol layer in the receiving equipment once or repeatedly; in the step of (316), transmitting messages from the protocol layer in the receiving equipment to the corresponding protocol layer in the transmitting equipment, so that data block transmission in the corresponding protocol layer in the transmitting equipment is stopped.
Description
The divisional application that the application is the applying date is on 02 18th, 2009, application number is 200980156961.9, name is called the Chinese invention patent application of " data retransmission scheme ".
Technical field
The present invention relates to moving communicating field.More particularly, aspect of the present invention relates to the data retransmission scheme improved in radio access network.
Background technology
Again transmission plan is important to the communication by insecure communication link.Such as, if (a) chain route by forward node (such as, router or gateway) the several links composition that connects, and one of those forward node can not forwarding data, or (b) the vicissitudinous link-quality of link tool (such as, link is radio link) and this quality stops expection receiver to be correctly decoded the data of transmission, then communication link can be insecure.Situation about herein considering is a rear situation.Several patten's design becomes to offset radio link quality change, and this comprises transmission again and the control of conveyer power, chnnel coding and combination thereof.
The transmission plan again that some networks (such as, high-speed packet access (HSPA) and Long Term Evolution (LTE)) adopt stops based on the N channel realized at medium education (MAC) layer and waits for agreement.In this quasi-protocol in LTE environment, MAC layer transmits N number of piece of coded data in N number of continuous subframes.To the time of (N+1) individual subframe, whether the MAC layer in receiver should respond it and can to detect and decode the first data block.The reason of N number of parallel procedure deal with data allows receiver to detect, decode and report positive acknowledgement (ACK) or Negative Acknowledgement (NACK) if having time.ACK and NACK can use individual bit to transmit.
If receiver instruction it can not by first data block decoding (such as, receiver transmits NACK to conveyer), then the MAC layer in conveyer will in (N+1) individual subframe " retransferring " this data block.That is, MAC layer will again transmit this data block in (N+1) individual subframe, as it is new data block, and/or transmits and help MAC layer in receiver to decode the information (such as, strengthening other coded-bit of the coding of data block) of this data block.
Again the maximum permission number of times K transmitted is configured by more higher protocol layer.If data block is not correctly decoded after K time again transmission, then NACK is sent to radio link in conveyer and controls automatic repeat request (ARQ) process of (RLC) layer, this data block (that is, the size of data block can be different) may can be retransferred at rlc layer after a certain segmentation again.
It is more high-rise that rlc layer is configured to be sure of that data block is transported in order.This means that then the correct data block received has to wait for subsequently if data block disappearance, until the data block of disappearance arrives.If the maximum times K of the quantity N of channel and again transmission attempt is very large, then this delay can be quite large.Therefore; if it is poor to assign the protection of the code for transmitting and data transfer rate to mate with radio link situation; then before data block correctly receives, RLC waits for a rapid lapse of time (such as, at least (N*k+1) individual subframe+RLC processing time) possibly.
Desirably overcome the transmission plan again of the improvement of above-mentioned and/or other shortcoming in conventional transmission plan again.
Summary of the invention
On the one hand, the invention provides a kind of re-transmission method.In certain embodiments, the method comprises the following steps: (1) at receiver (such as, base station or mobile terminal) in protocol layer (such as, MAC layer) receive from conveyer (such as, base station or mobile terminal) in the data block that transmits of corresponding protocol layer (such as, MAC layer); (2) determine this data block to be decoded; (3) even if this data block is retransmitted to protocol layer in receiver once or several times by the corresponding protocol layer determining in conveyer, this data block of also can not be able to decoding; (4) send the first feedback information from the protocol layer receiver to the corresponding protocol layer signal in conveyer, instruction have received this data block; And (5) send second feedback information relevant with this data block from the protocol layer receiver to the corresponding protocol layer signal in conveyer, the second feedback information comprises the information relevant with the time of reception of this data block and indicates this data block to be stopped (abort).
In certain embodiments, the step of this data block of determining be able to decode comprises the value again relevant with the probability of decoded data block after transmission once or several times calculated from conveyer.Described calculation procedure can comprise: determine or estimate the value relevant with radio condition; And at least in part based on the value determined or estimate, calculate the value relevant with the probability of this data block of decoding.In certain embodiments, relevant with radio condition value is the value (such as, the estimation of average SIR) of identification signal interference (SIR) ratio.
In certain embodiments, described calculation procedure comprises and monitors soft bit decision tolerance and use the soft bit decision tolerance monitored to determine that decoding is attempted whether close to success.The soft bit decision tolerance that described calculation procedure also can comprise use supervision determines that the decoding of failure is attempted whether attempting closer to success than last decoding.
In certain embodiments, comprise by the step that signal sends the second feedback information the channel status reporting comprising the second feedback information to conveyer transmission.In certain embodiments, the second feedback information comprises special control element (such as, special MAC control element), and the first feedback information is by indicating the individual bit of ACK or NACK to form.
In certain embodiments, after the first feedback information is received by conveyer, second feedback information is received by conveyer, and the second feedback information comprises receiving time information, in described receiving time information instruction receiver, protocol layer corresponding protocol layer from conveyer receives the time at this data block place.Conveyer can be configured to use receiving time information to determine the data block relevant with the second feedback information.Conveyer and receiver can have common time reference on protocol level.When sending second feedback information relevant with data block with signal, preferably also using and ACK (such as, the first feedback information can be made up of the individual bit of instruction ACK) is sent to the first feedback information signal of identical block.
In certain embodiments, conveyer is configured to help the protocol layer in receiver, this data block be decoded this data block that retransfers by again transmitting this data block (as it is new data block) and/or transmitting the information relevant with this data block.Advantageously, the transformat for again transmitting this data block is applicable to the radio condition determined.
In certain embodiments, response reception second feedback information, the corresponding protocol layer of conveyer to the second protocol layer in conveyer (such as, rlc layer) notify that this data block is stopped, and other data block that this second protocol layer identification is relevant with the data block of this termination in the response; In some embodiments, the data block of this termination belongs to certain Protocol layer data unit, and the identification of second protocol layer belongs to other data blocks all of described Protocol layer data unit.Protocol layer data unit can be received from the 3rd protocol layer (such as, network layer) conveyer side by second protocol layer.
On the other hand, the invention provides a kind of communicator of improvement.In certain embodiments, this communicator comprises: receiver; Conveyer; Data-storage system; And data handling system, this system operable with: protocol layer from conveyer of determining to decode is sent to the data block of protocol layer in communicator; Even if this data block is retransmitted to communicator and also can not be able to decodes once or several times this data block by the protocol layer determining in conveyer; Send the first feedback information to the protocol layer signal in conveyer, instruction have received this data block; And respond the determination of this data block of can not be able to decoding, send second feedback information relevant with this data block to the protocol layer signal in conveyer, the second feedback information comprises the information relevant with the time of reception of this data block and indicates this data block to be stopped.
Above-mentioned and other side and embodiment are described with reference to the accompanying drawings.
Accompanying drawing explanation
Accompanying drawing is combined in herein, and forms a part for specification, and it illustrates various embodiment of the present invention, and together with the description, is further used for explaining principle of the present invention and making those skilled in the relevant art can manufacture and use the present invention.The element that reference numeral instruction similar in figure is identical or functionally similar.
Fig. 1 illustrates a part for mobile communications network.
Fig. 2 illustrates the functional block diagram of the functional block diagram of some assemblies of UE and some assemblies of base station.
Fig. 3 is the flow chart of the process illustrated according to some embodiments of the present invention.
Fig. 4 is the flow chart of the process illustrated according to some embodiments of the present invention.
Fig. 5 is the flow chart of the process illustrated according to some embodiments of the present invention.
Fig. 6 is the functional block diagram of UE according to some embodiments of the invention.
Fig. 7 is the functional block diagram of base station according to some embodiments of the invention.
Fig. 8 illustrate to pass by time according to the radio condition of SIR and constant and use Chase to merge while attempting (each retransfer identical data block) time each transmission attempt block error probability.
Fig. 9 illustrates the link performance modeling being divided into demodulator and decoder modeling.
Figure 10 illustrates the functional block diagram of the functional block diagram of some assemblies of UE and some assemblies of base station.
Embodiment
A part for mobile communications network 100 is shown referring now to Fig. 1, Fig. 1.As shown in Figure 1, mobile terminal 102 (also referred to as subscriber equipment (UE) 102) service that user can be provided through the core network 106 of base station 104 access carrier.Base station 104 as known to the skilled person processes wireless radio transmission in one or more community (i.e. geographic area) and reception.In LTE environment, base station 104 is called evolution NodeB (eNB).
The functional block diagram of the functional block diagram of some assemblies of UE 102 and some assemblies of base station 104 is shown referring now to Fig. 2, Fig. 2.As shown in Figure 2, base station 104 comprises rlc layer 122 (a), MAC layer 126 (a) and physical layer 130 (a).Similarly, UE 102 comprises rlc layer 122 (b), MAC layer 126 (b) and physical layer 130 (b).Although not shown, what may have on rlc layer 122 is one or more more high-rise.
Also as shown in Figure 2, MAC layer in the communicator being called conveyer or conveyer (such as, the MAC layer 122 (b) of UE 102 or MAC layer 122 (a)) coded data can be sent to the MAC layer (such as, MAC layer 122 (a) or MAC layer 122 (b)) be called in another communicator of receiving system or receiver.MAC layer in receiver is configured to the coded data detected and decoding transmits, and transmits a response to the MAC layer in conveyer.Such as, MAC layer response success decoded data in receiver and transmit positive acknowledgement (ACK) to the MAC layer in conveyer, if but receiver detects data and can not decoded data, then, the MAC layer in receiver transmits Negative Acknowledgement (NACK) to the MAC layer in conveyer.Generally, ACK and NACK uses individual bit to transmit.
Referring now to Fig. 3, Fig. 3 is the flow chart of the transmitting procedure again 300 of the improvement illustrated according to some embodiments of the present invention, this process is performed (such as, MAC layer 122 (a) or MAC layer 122 (b)) by the MAC layer 122 in receiver.Process 300 starts in step 302, and in this step, the MAC layer in receiver receives the data block (or data relevant with data block) that MAC layer transmits from conveyer.In step 304, MAC layer attempts using the data received in step 302 data block to be decoded.In step 305, MAC layer determines its whether successful decoded data block.If so, then process 300 proceeds to step 308, and in this step, MAC layer transmits ACK to the MAC layer in conveyer.Otherwise the MAC layer in receiver transmits NACK (step 314) or abort message (316) by the MAC layer in conveyer.
Such as, in certain embodiments, if data block can not be decoded by the MAC layer in receiver, then process 300 proceeds to step 312, and in this step, MAC layer calculated value P also compares P and threshold value T.If P is less than T, then process 300 proceeds to step 316, in this step, MAC layer connection closed message, designation data block is stopped, that is, indicate MAC layer determination MAC layer decoded data block to be impossible; Otherwise process 300 proceeds to step 314, in this step, MAC layer transmits NACK.
In certain embodiments, abort message is made up of special control element (such as, special MAC control element).Be in other embodiment of receiver at UE, abort message channel status report (such as, CQI (CQI) report or other channel status reporting) transmits.
In certain embodiments, abort message indicates the HARQ procedure of trial solution code data in the MAC layer of receiver.This information can by the MAC layer in conveyer for identifying the data block be associated with abort message.Abort message can also comprise and identifies that HARQ procedure fails the information of time of decoded data block, and this information can by the MAC layer in conveyer for identifying the data block be associated with abort message.
In certain embodiments, in step 316, except connection closed message, MAC layer also transmits ACK with the transmission impelling the MAC layer in conveyer to stop data block.This feature is shown in Figure 10, this illustrate receiver 102 to conveyer 104 connection closed message 1002 and ACK 1003 with respond received code data block 1001, can not decode encoded data block 1001 and determine that P is less than T.In certain embodiments, do not send ACK, and send NACK.
As noted above, in step 312, the MAC layer calculated value P in receiver.In certain embodiments, P is decoding probability.Such as, P can be represent MAC layer in receiver can in conveyer K time of the MAC layer probability (K>0) of decoded data block in transmission attempt again.If P is less than predefine threshold value T, then to this means in conveyer that MAC layer continues to the MAC layer transmission block in receiver or information to help MAC layer decoded data block in receiver to be useless.
In certain embodiments, P is the function of decoder metric (such as, soft decoder metric), and in decoder metric instruction receiver, MAC layer has how close from successful decoded data block.Such as, in certain embodiments, again transmit for each of data block, MAC layer (1) produces and carrying recorded decoding tolerance amount, and instruction MAC layer has how close from successful decoded data block, and (2) use this information to determine P.Such as, by recording this type of decoder metric, the MAC layer of receiver can by checking that the soft decoder metric between transmission attempt increases, the decoding determining once transmission attempt again whether than the front decoding once again transmitted closer to success.The tolerance growth behavior designator whether possible data is correctly decoded the most at last.Slow growth can be considered as instruction even after many transmission attempts radio condition for be correctly decoded be still inadequate.Fast growth can be considered as designation data and will finally be correctly decoded.Correspondingly, value P can be the function of decoder metric change.
In other embodiments, P (decoding probability) also can be the function of the value relevant with radio condition.Such as, relevant with radio condition value can be the value of identification signal interference ratio (SIR) or the value (such as, identifying the value of the estimation of average SIR) that draws from it.Such as, can create the model relevant according to the radio condition of SIR and P (or block error probability (BLEP), this is complementary amount-namely, BLEP=1-P).This class model can draw by using the detailed description of modulation and coding in simulator and specification.More accurately model SIR can be distributed (more generally, the statistical attribute of SIR) relevant to BLEP.In one embodiment, P equals the estimation of effective SIR in repeatedly transmission attempt, and this estimation can be added up based on the SIR of the estimation from the transmission attempt completed.Such as, if K
1average SIR in <K transmission attempt is less than SIR
thres, then decoding probability is considered to be not enough after K transmission attempt.In relevant with particular transmission format in Fig. 8 example, if average SIR is less than or equal to-2dB, then prediction decoding probability is not enough.
After considering repeatedly transmission attempt during the decoding of data, modeling being separated into two parts is that useful-part depends on modulation, and a part depends on chnnel coding.After each transmission attempt coding gain different and modulate identical time, this is applicable.Fig. 9 illustrates the modeling in an example embodiment.For each piece of data, by determining the bit information received from the mapping of SINR.One this type of to map be channel capacity (C=log according to Shannon
2(1+SINR) [bit/symbol]).Subsequently, the bit information rate of reception is defined as the linear average in consecutive data block.This uses in mapping to second of block error probability in decoder model.The bit information rate received is linear, the bit information bit rate of the reception of the transmission attempt of considering over.This fact to be conducive to when such as assumed wireless electricity situation remains unchanged the prediction of the information rate after transmission attempt subsequently.
It is the flow chart of the process 400 performed by communicate mac layer illustrated according to some embodiments referring now to Fig. 4, Fig. 4.Process 400 can from step 402, and in this step, communicate mac layer receives data from more high-rise (such as, rlc layer), and this more high-risely have received data cell from more high-rise (such as, network layer).In step 404, data block (such as, from the coded data of data cell) is sent to the MAC layer in receiver by MAC layer.In a step 406, the MAC layer in conveyer receives the feedback from the relevant data block of MAC layer in receiver.If feedback is ACK, then process 400 turns back to step 402.If feedback is NACK, then process 400 turns back to step 408.
In a step 408, communicate mac layer " retransfers " data block.That is, such as, the data block that communicate mac layer transmits in transfer step 404 again, as it is new data block, and/or the data block (such as, strengthening other coded-bit of the coding of data block) that the information of transmission sent in the past to help the MAC layer decoding in receiver.
In step 410, communicate mac layer receives the feedback from MAC layer in receiver.If feedback is ACK, then process 400 then turns back to step 402.If feedback is NACK, then process 400 then turns back to step 408.If feedback is abort message, then process 400 proceeds to step 412.Above with reference to described in step 316, the MAC layer in receiver may can send two feedback informations (such as, abort message and ACK) relevant with individual data block.Therefore, it is possible that repeat step 410, and the MAC layer in conveyer need not transmit anything further to the MAC layer in receiver.Therefore, MAC layer in conveyer can receive the first feedback message (such as from the corresponding MAC layer receiver, ACK) and the second feedback message (such as, abort message), two message transmit by the MAC layer in receiver and receive and process data block to respond it.In certain embodiments, the first feedback message received before the second feedback message.
In step 412, response receives abort message, and the MAC layer in conveyer determines the data block relevant with abort message.As mentioned above, determine for ease of this, abort message can comprise time reference.MAC layer in the MAC layer be conducive in conveyer and receiver is had the determination in the embodiment of common time base by time reference.MAC layer in conveyer and the MAC layer in receiver have in other embodiment of common time base, and the MAC layer in conveyer can receive time at abort message place based on the MAC layer in conveyer and determine to be received the data block that the MAC layer in device stops.
In step 414, the MAC layer in conveyer is stopped to the data block of more high-rise notice identification, and/or uses different transpost formats (such as, being applicable to the transformat of current radio condition) or segmentation to this data block that retransfers.Relevant data block (such as, belonging to the data block of same data unit) also can be stopped in step 414.
It is the flow chart of the process 500 performed by communicate mac layer illustrated according to some embodiments referring now to Fig. 5, Fig. 5.If except receiving NACK in step 410, then process proceeds to step 502 instead of then gets back to outside step 408, and process 500 is identical with process 400.In step 502, communicate mac layer determines the data whether useless (that is, repeating step 408 will be useless) that retransfer.If MAC layer determines that it can not be useless, then process turns back to step 408, otherwise it proceeds to step 512.In step 512, communicate mac layer determines termination to more high-rise notice, and/or uses different transpost formats or segmentation to retransfer data (relevant data block also can be stopped).In certain embodiments, communicate mac layer is determined whether to retransfer data by useless based on the radio condition report transmitted from receiver (such as, CQI (CQI) report).Such as, there is sizable deterioration in radio condition report instruction radio channel quality, and subsequently, MAC layer data of can determining to retransfer are useless.
Referring now to the functional block diagram that Fig. 6, Fig. 6 are the UE 102 according to some embodiments of the present invention.As shown in the figure, UE 102 can comprise the computer software 608 that data handling system 602 (such as one or more microprocessor), data-storage system 606 (such as, one or more Nonvolatile memory devices) and storage system 606 store.Configuration parameter 610 (such as, above mentioned threshold value) also can be stored in storage system 606.UE 102 also comprises transmission/reception (Tx/Rx) circuit 604 for the data transferring data to base station 104 and receive from base station 104.Software 608 is configured, and makes when processor 602 executive software 608, and UE 102 performs above-mentioned steps (such as, above with reference to the step that the flow chart shown in Fig. 3,4 and/or 5 describes).
Such as, software 608 can comprise: the computer instruction of the data block that (1) transmits for from the conveyer protocol layer of determining to decode; (2) even if the protocol layer for determining in conveyer retransfers, data block also can not be able to be decoded the computer instruction of this data block once or several times; (3) for sending the first feedback information with the computer instruction indicating this data block received by signal to the protocol layer in conveyer; And (4) are for sending second feedback information relevant with data block with the computer instruction in response to this data block of determining be able to decode by signal to the corresponding protocol layer in conveyer, the second feedback information comprises the information relevant with the time of reception of this data block and indicates this data block to be stopped.
Referring now to the functional block diagram that Fig. 7, Fig. 7 are the base stations 104 according to some embodiments of the present invention.As shown in the figure, base station 104 can comprise the computer software 608 that data handling system 702 (such as one or more microprocessor), data-storage system 706 (such as, one or more Nonvolatile memory devices) and storage system 706 store.Configuration parameter 710 (such as, above mentioned threshold value) also can be stored in storage system 706.Base station 104 also comprise for transfer data to UE 102 and from its receive data transmission/reception (Tx/Rx) circuit 704 and for transmission/reception (Tx/Rx) circuit 705 transferring data to such as core network 106 and receive data from it.
Although described various embodiment of the present invention above, should be understood that they are exemplarily instead of limit and provide.Therefore, range of the present invention and scope should not limit by any above-mentioned example embodiment.
In addition, show for continuous print step with the process shown in figure although above-described, do the cause just in order to illustrate like this.Correspondingly, expection can add some steps, can omit some steps, and can rearrange the order of step, and can some steps of executed in parallel.
Claims (38)
1. a re-transmission method (300), the method comprises:
Protocol layer (136) in receiving equipment (102) receives the data block (1001) that corresponding protocol layer (126) transmits from transfer equipment (104);
Determine that (305) can not decode described data block;
Determine (315) though the described corresponding protocol layer one or many in described transfer equipment the described data block that retransfers to the described protocol layer in described receiving equipment, the possibility that described data block can be decoded is also very little; And
By described protocol layer transmission (316) message in described receiving equipment to the described corresponding protocol layer in described transfer equipment, the described corresponding protocol layer in described transfer equipment is made to stop the transmission of described data block.
2. method according to claim 1, wherein determines that the very little one or many be included in from described transfer equipment of possibility that described data block can be decoded calculates the value relevant with the possibility of described data block of decoding after again transmitting.
3. method according to claim 2, wherein calculation procedure comprises:
Determine or estimate the value relevant to radio condition;
At least partly based on determine or estimated value, calculate the value relevant with the possibility of described data block of decoding.
4. method according to claim 3, the value that wherein said and described radio condition is relevant is the value that identification signal disturbs SIR ratio, and the value of wherein said identification signal interference SIR ratio is the estimation of average SIR.
5. method according to claim 2, wherein calculation procedure comprises the soft bit decision tolerance of monitoring.
6. method according to claim 5, the method comprises soft bit decision tolerance that use monitors further and determines that decoding is attempted whether close to success.
7. method according to claim 6, the method comprises further determines that the decoding of failure is attempted whether attempting closer to success than decoding before.
8. method according to claim 1, wherein carry out transmission by described protocol layer and comprise:
Transmit the first message, this first message indicates described data block to be received; And
Transmit second message different from described first message, this second message comprises the information relevant with the time of reception of the described data block of the described protocol layer at described receiving equipment.
9. method according to claim 8, wherein transmit described second message and comprise transfer channel status report to described transfer equipment, this channel status reporting comprises the information relevant with described time of reception.
10. method according to claim 8, wherein said second message comprises special MAC control element.
11. methods according to claim 8, wherein said first message comprises the individual bit of instruction ACK.
12. methods according to claim 8, wherein said second message is received after described first message by described transfer equipment.
13. methods according to claim 8, wherein said second message comprises receiving time information, and this receiving time information indicates the described protocol layer in described receiving equipment to receive the time of described data block from the described corresponding protocol layer described transfer equipment.
14. methods according to claim 8, the method comprises use receiving time information to determine the data block belonging to described second message.
15. methods according to claim 14, wherein said transfer equipment and described receiving equipment have common time reference on described protocol layer.
16. methods according to claim 1, the method comprises and to retransfer described data block by again transmitting described data block as new data block.
17. methods according to claim 16, the transformat wherein for again transmitting described data block is applicable to determined radio condition.
18. methods according to claim 1, the method comprises and transmits the information relevant to described data block and to decode described data block and the described data block that retransfers to help the described protocol layer in described receiving equipment.
19. methods according to claim 1, to the second protocol layer in described transfer equipment, the described corresponding protocol layer in wherein said transfer equipment notifies that described data block is stopped.
20. methods according to claim 19, other data blocks that the identification of wherein said second protocol layer is relevant with stopped data block.
21. methods according to claim 19, wherein stopped data block belongs to Protocol layer data unit, and the identification of described second protocol layer belongs to other data blocks of described Protocol layer data unit.
22. methods according to claim 21, wherein said Protocol layer data unit is received from the 3rd protocol layer described transfer equipment side by described second protocol layer.
23. methods according to claim 19, wherein
Described protocol layer in described receiving equipment is that media get involved mac layer, and
Described corresponding protocol layer in described transfer equipment is MAC layer.
24. methods according to claim 23, the described second protocol layer wherein in described transfer equipment is that radio link controls rlc layer.
25. 1 kinds of communication equipments for again transmitting, this equipment comprises:
The device of the data block (1001) that corresponding protocol layer (126) transmits from transfer equipment (104) is received for the protocol layer (136) in receiving equipment (102);
For determining that (305) can not decode the device of described data block;
For determining (315) though the described corresponding protocol layer one or many in described transfer equipment the described data block that retransfers to the described protocol layer in described receiving equipment, the device that the possibility that described data block can be decoded is also very little; And
For by the described corresponding protocol layer of described protocol layer transmission (316) message in described receiving equipment extremely in described transfer equipment, the described corresponding protocol layer in described transfer equipment is made to stop the device of the transmission of described data block.
26. communication equipments according to claim 25, wherein for determining that device that possibility that (305) described data block can be decoded is very little comprises the device for calculating the value relevant with the possibility of described data block of decoding after again transmitting at the one or many from described transfer equipment.
27. communication equipments according to claim 26, the device wherein for calculating the value relevant with the possibility of described data block of decoding after again transmitting at the one or many from described transfer equipment comprises:
For determining or estimate the device of the value relevant to radio condition;
For at least part of based on determine or estimated value, calculate the device of the value relevant with the possibility of described data block of decoding.
28. communication equipments according to claim 27, the value that wherein said and described radio condition is relevant is the value that identification signal disturbs SIR ratio, and the value of wherein said identification signal interference SIR ratio is the estimation of average SIR.
29. communication equipments according to claim 26, the device wherein for calculating the value relevant with the possibility of described data block of decoding after again transmitting at the one or many from described transfer equipment comprises the device measured for monitoring soft bit decision.
30. communication equipments according to claim 29, this equipment comprises further for using monitored soft bit decision tolerance to determine that whether decoding is attempted close to successful device.
31. communication equipments according to claim 30, whether the decoding comprised further for determining failure of this equipment is attempted attempting closer to successful device than decoding before.
32. communication equipments according to claim 25, the device wherein for being undertaken transmitting by described protocol layer comprises:
For transmitting the device of the first message, this first message indicates described data block to be received; And
For transmitting the device of second message different from described first message, this second message comprises the information relevant with the time of reception of the described data block of the described protocol layer at described receiving equipment.
33. communication equipments according to claim 32, wherein said second message comprises special MAC control element.
34. communication equipments according to claim 32, wherein said first message forms by indicating the individual bit of ACK.
35. communication equipments according to claim 32, wherein said second message is received after described first message by described transfer equipment.
36. communication equipments according to claim 32, wherein said second message comprises receiving time information, and this receiving time information indicates the described protocol layer in described communication equipment to receive the time of described data block from the described corresponding protocol layer described transfer equipment.
37. communication equipments according to claim 25, the described protocol layer wherein in described communication equipment and described transfer equipment is that media get involved control (MAC) layer.
38. communication equipments according to claim 25, described communication equipment is base station or mobile terminal.
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| CN109921884A (en) * | 2017-12-13 | 2019-06-21 | 华为技术有限公司 | The method, apparatus and communication system of data transmit-receive |
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| CN101034953A (en) * | 2006-03-06 | 2007-09-12 | 西门子通信技术（北京）有限公司 | Method for carrying out data transmission using the low-density parity check code |
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