CN103905169A - Data unit transmission method - Google Patents
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- CN103905169A CN103905169A CN201410124016.3A CN201410124016A CN103905169A CN 103905169 A CN103905169 A CN 103905169A CN 201410124016 A CN201410124016 A CN 201410124016A CN 103905169 A CN103905169 A CN 103905169A
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Abstract
The invention relates to a data unit transmission method, and discloses the method controlling data unit transmission from a transmitter (10) to a receiver (11). The method includes the following steps that the transmitter (10) transmits a data unit to the receiver (11), the receiver (11) sends a feedback message (102) of receiving state information (104) including the data unit (101) to the transmitter (10), the receiving state information indicates one of correct receiving and incorrect receiving, and after the feedback message (102) is received, the transmitter (10) sends feedback response information (105) which indicates the receiving state provided by the received feedback message (102) to the receiver (11).
Description
Female case applying date of this divisional application is that August 24, application number in 2005 are 200580051386.8, denomination of invention is " data cell conveying method ".
Technical field
The present invention relates to the field of the data unit communication between transmitter and receiver, relate to the method for controlling transmitter and receiver, and relate to transmitter and the receiver of relative set.
Background technology
In the field of data unit communication, be known that the data cell transmission of controlling in the following manner from transmitter to receiver: sender to receiver sends one or more data cells, and the return messages of receiver one or more correspondences from receiving status information to transmitter loopback that comprise.Receiving status information for example can show correct reception or incorrect reception, and wherein incorrect reception may comprise and has the reception that can not correct mistakes or do not receive completely.Example is to send known acknowledge message (ACK) or negative acknowledgement message (NACK).
A problem that may occur is, feedback message may be easy to make mistakes.This may cause following impact: the receiving status information in feedback message changes, and makes transmitter correctly not receive the notice about the accepting state on receiver.A kind of solution of imagining of this problem is so that receiving status information becomes abundant mistake proofing, for example, by adding the mode of redundancy, receiving status information is encoded.
Summary of the invention
The object of this invention is to provide improvement control method and corresponding improved transmitter and the receiver of improving one's methods of controlling that data cell from transmitter to receiver transmits and transmitter and receiver.
Object of the present invention realizes by the method and apparatus described in independent claims.Preferred embodiment is described in the dependent claims.
According to one embodiment of present invention, transmitter is through arranging, make after receiving the feedback message that comprises receiving status information, send feedback response information to receiver, wherein feedback response information shows accepting state represented in received feedback message.In other words, transmitter is determined accepting state represented in feedback message, is then represented that loopback is to receiver.For example, if receiver sends ACK or NACK, sender to receiver sends the feedback response information that shows whether to receive ACK or NACK.
Rely on this concept, whether receiver can following feedback message correctly arrive transmitter.Receiver can by any suitably or expection mode utilize this information.For example, can preserve this information completely for the ease of statistics.Preferably, receiver is carried out the judgement whether feedback response information identical data-oriented unit being provided about receiving status information and the transmitter of data-oriented unit shows identical accepting state.Judge according to this, can assess transmitter and whether correctly receive the notice about accepting state.The result of this judgement can have different purposes.
For example, in the time considering that sender to receiver sends the ordinary circumstance of sequence of some data cells, receiver can be monitored the quantity that receiving status information and feedback response information do not show the event of identical accepting state, for example encode by improvement or increase signal strength signal intensity by this quantity as making feedback message more can prevent wrong basis.
According to a preferred embodiment, if determining feedback response information and receiving status information, receiver do not show identical accepting state, wrong instruction is sent out as error response procedure.Response receives wrong instruction, and transmitter for example can carry out the re-transmission of described data cell where necessary.For example, if the receiving status information on receiver shows incorrect reception, feedback response information shows correct reception, this means that the information in feedback message shows correct reception from showing that incorrect reception is changed into, and the described data cell of transmitter re-transmission is preferred.In other words, in this case, data cell is not correctly received on receiver, and still, the feedback message that arrives transmitter shows correct reception, makes transmitter think that data cell is correctly transmitted.
Note, in an embodiment of the present invention, feedback response information can by any suitably or expection mode, for example in the data cell such as such as special feedback response message or in another data cell of institute's transfer sequence, send to receiver, or feedback response information also can by with send for the signaling channel that is connected separation that transmits data cell.
According to the present invention, provide the improvement control transmitting for the data cell from transmitter to receiver, because the mistake of feedback message can be detected and may eliminate.
According to a preferred embodiment, concept of the present invention is applicable to the context that the grand diversity (macro-diversity) from transmitter to multiple receivers transmits.
Brief description of the drawings
By the description to specific embodiment referring to accompanying drawing, concept of the present invention and advantage will become and be easier to understand, and accompanying drawing comprises:
Fig. 1 illustrates the information exchange between transmitter according to an embodiment of the invention and receiver;
Fig. 2 illustrates the flow chart of one embodiment of the present of invention;
Fig. 3 illustrates the information exchange between transmitter and receiver according to another embodiment of the invention;
Fig. 4 illustrates the information exchange between transmitter and receiver according to still another embodiment of the invention;
Fig. 5 illustrates the flow chart of an alternative embodiment of the invention;
Fig. 6 explanation according to another embodiment of the invention, the transmitter of grand diversity in transmitting and the information exchange between multiple receiver;
Fig. 7 illustrates the flow chart of the control method of transmitter according to an embodiment of the invention;
Fig. 8 illustrates the flow chart of the control method of receiver according to an embodiment of the invention; And
Fig. 9 illustrates the schematic block diagram of transmitter embodiment of the present invention and receiver embodiment.
Embodiment
Fig. 1 illustrates the of the present invention first basic embodiment, and wherein reference number 10 belongs to transmitter and reference number 11 belongs to receiver.At first, sender to receiver 11 sends data cell 101.Receiver 11 is determined accepting state, and receiving status information 104 is correspondingly provided.Receiving status information can by any suitably or expection mode provide, but at least show correct reception or incorrect reception.About receiving, whether correct judgement can be undertaken by any known way, for example, add data cell 101, information for allowing to check whether data cell has been destroyed to by inspection, as cyclic redundancy check information etc.Be noted that incorrect reception comprises the data cell with correctable error not or the situation that does not receive data cell completely of receiving.
The transmission that may be noted that in this respect feedback message 102 not necessarily triggers by receiving data cell 101, but it may trigger by receiving data cell 101.For example, data cell 101 may be in sending to from transmitter 10 among the data unit sequence of receiver 11, and in the time receiving one of data cell from this sequence, receiver 11 sends feedback message to transmitter 10, and wherein feedback message provides about the information of other data cell that is different from received data unit.Its example is to produce cumulative acknowledgment messages.Receiver also may be arranged to regularly send receiving status information, even if do not have data cell to arrive completely.But preferably, receiver 11 responses receive data cell 101 and send feedback message 102, wherein feedback message 102 comprises the receiving status information relevant to data cell 101.
In the example of Fig. 1, after receiving feedback message 102, transmitter 10 is determined indicated accepting state in the feedback message 102 receiving, and then sends corresponding feedback response information 105 to receiver 11.The accepting state being provided by received feedback message 102 is provided feedback response information 105.For example, if transmitter 10 reads the accepting state of correct reception from feedback message 102, feedback response information 105 shows correct reception.
Transmission in data cell can by any suitably or expection mode carry out.Feedback response information can be placed in the head or payload of data cell.It may be for example the single position that shows correct reception or incorrect reception, or may be the bitmap that comprises predetermined number of bits.A kind of very favourable mode of feedback response information being put into data cell is that information is added to through redundancy encoding, as CRC coded data cell mesh.By that mode, the reliable transmission of feedback response information can adopt simple components to provide.In the above example sending by the data cell in sequence in feedback response information, if CRC coding is used for payload portions by data cell, for example can add feedback response information to payload portions.
According to another embodiment, the feedback response information 105 of data-oriented unit 101 also can send together with the feedback response information of other data cell of this sequence.In other words, may realize concept of the present invention by following manner: send the feedback response information report that comprises the information associated with multiple data cells.
Fig. 2 illustrates the flow chart of an embodiment of the method for the present invention.At first step S21, sender to receiver sends data cell.At step S22, receiver sends feedback message to transmitter, and at step S23, sender to receiver sends feedback response information.
Another example of error response procedure is to send error message to transmitter 10.This situation illustrates in conjunction with Fig. 4, and Fig. 4 adopts the reference number identical with Fig. 1, thereby do not need to repeat the element of Fig. 1.In Fig. 4, after receiving the feedback response message 103 that comprises feedback response information 105, receiver 11 compares 107, and in the example of Fig. 4, suppose and mistake detected, feedback response information 105 and receiving status information 104 do not show identical accepting state.For example in message 109, send wrong instruction 108 to transmitter 10.Message 109 may be the feedback message of for example different from m data cell 101 of associated receiving status information 104 and feedback response information 105 data cell.Message 109 may be also dedicated error message.Also may in a message, send more than one wrong instruction, for example, relate to and will send to the sequence of the data cell of receiver from transmitter if transmitted, wrong instruction, as the instruction 108 in Fig. 4 also can transmission together with being different from the mistake instruction of other data cell of m data cell.
In addition, correctly receive the possibility of wrong instruction 108 in order to increase transmitter 10, the transmission of mistake instruction 108 can repeat once above, for example repeat pre-determined number.
According to a preferred embodiment, transmitter and receiver be through arranging, and makes relatively 107 showing that receiving status informations 104 show incorrect reception and feedback response information 105 shows to retransmit while correctly reception.In other words, in this case, correctly do not receive data cell 101 on receiver 11, still, by the mistake in feedback message 102, transmitter thinks that it is correctly received.Therefore, wish to carry out the re-transmission of m the data cell sending in data cell 101.This target can realize by different modes.For example, receiver 11 can arrange by the mode of transmitting comparative result by mistake instruction 108.Then, transmitter 10 can read wrong instruction, determines concrete not mating, and then triggers in transmitting 111 and retransmits m data cell.Or, receiver 11 may be set as follows: only send the mistake instruction of a type, and only show that receiving status information 104 shows incorrect reception and feedback response information 105 is just sent out while showing correctly to receive in 107 result relatively.10 of transmitters can, through arranging, make it when receiving wrong instruction at every turn, carry out and retransmit.
In this context, be also noted that, mistake instruction may or may clearly not identify comparison 107 to its produce the sequence position identifier of the data cell of wrong instruction, as the m in Fig. 4.If wrong instruction 108 comprises sequence position identifier, suitable re-transmission is direct.But mistake instruction 108 may be also the simple binary signal that shows mistake, and 10 of transmitters retransmit the last data cell sending.Rear a kind of alternative may cause than the lower reliability of front a kind of alternative, but does not always need or expect absolute reliability.For example, if transmitter 10 and receiver 11 are given protocol layers, as the peer-to-peer of link layer, and if upper-layer protocol allow certain data loss rate, do not need absolute reliability.As an example, transmitter 10 and receiver 11 are link layer peers, if higher level operation TCP, 10
-6data loss rate be completely acceptable, and if just moving for example the Internet telephony application, what for to 10
-3data loss rate be also acceptable.For example, if the vision response test of the misunderstanding of for example, incorrect reception (NACK) to correct reception (ACK) is 10
-4and if adopt and do not have the embodiment of the mistake of sequence position identifier instruction that Loss Rate is reduced to 10
-6, this is enough for above-mentioned TCP example, even without reaching completely reliable.
Above-mentioned concept and embodiment may be specially adapted to the environment that the data cell from a transmitter to multiple receivers transmits.As shown in Figure 6, Fig. 6 relates to from the grand diversity transmission of transmitter 10 to first receivers 61 and the second receiver 62 its example.Term " grand diversity " represents to communicate by least two different paths, to increase overall transmission quality.In other words, in the time checking the example of Fig. 6, if data cell sends to two different receivers 61 and 62 from transmitter 10, even if data cell is lost or destroyed in the way of being sent to a receiver, still there is the correct possibility that arrives another receiver.In the example of Fig. 6, two receivers 61 and 62 are shown.This is an example, because the communication from a transmitter to multiple receivers may relate to an any amount n receiver, wherein n is greater than 1 integer.In one embodiment of the invention, transmitter to each of n receiver, the receiver 61 and 62 in the example of Fig. 6 send to given data unit, as the data cell 601 in Fig. 6.For the each value of the i from 1 to n, i receiver sends i feedback message to transmitter, for example, send to the first feedback message 602_1 of transmitter 10 and send to the second feedback message 602_2 of transmitter 10 from the second receiver 62 from receiver 61.For the each value of the i from 1 to n, i receiver sends i feedback message to transmitter, for example, send to the first feedback message 602_1 of transmitter 10 and send to the second feedback message 602_2 of transmitter 10 from the second receiver 62 from receiver 61.The receiving status information that each feedback message comprises data cell, described receiving status information shows that at least correct on i receiver receives and incorrect reception the two one of them.In the example of Fig. 6, suppose at the first receiver 61 and on the second receiver 62 and receive improperly data cell 601, making feedback message 602_1 and 602_2 is NACK message.In the ordinary course of things, after receiving i feedback message, transmitter 10 will send i the feedback response information that shows accepting state represented in i received feedback message to i receiver.The example of Fig. 6, this means again, and transmitter 10 is determined the indicated accepting state on receiver 61 and determines the indicated accepting state on the second receiver 62 according to feedback message 602_2 according to received feedback message 602_1.Then produce respectively and send each feedback response information of multiple receivers.In previous example, the transmission of feedback response information can by any suitably or expection mode carry out, for example carry out via the signaling channel different from the path that sends data cell.
I feedback response information can send to separately i receiver, that is, each receiver receives its own independent feedback response information in private communication.According to a preferred embodiment, transmitter 10 comprises the 1st to n feedback response information in the message of each that sends to multiple receivers.This wherein, puts into the feedback response information of the first receiver 61 and the second receiver 62 data cell 603 that sends to two receivers shown in the example of Fig. 6.
More particularly, in the example of Fig. 6, suppose that transmitter 10 reads the accepting state of incorrect reception (NACK) from feedback message 602_1, and transmitter 10 reads the accepting state of correct reception (ACK) from feedback message 602_2.In other words, suppose that the accepting state on the second receiver 62 is actually incorrect reception, but due to the mistake of the transmission of feedback message 602_2, transmitter 10 receives about the instruction that correctly receives data cell 601 on the second receiver 62.Therefore, the feedback response information that transmitter 10 produces is the incorrect reception of the first receiver 61 and the correct reception of the second receiver 62, is expressed as 61:NACK and 62:ACK in Fig. 6.
In the example of Fig. 6, suppose that feedback response information sends with together with data cell the sequence that sends to receiver 61,62 from transmitter 10.Data cell 601 is relevant to m data cell of this sequence, and in the example of Fig. 6, transmitter 10, by being sent in next data cell in sequence, i.e. m+1 data cell 603, is reacted to receiving feedback message 602_1 and 602_2.Above-mentioned feedback response information is included in data cell 603.The reason that sends the next data cell in this sequence is the second receiver 62 to show correct reception.In general, after receiving the receiving status information that shows the correct reception at least one of multiple receivers of data-oriented unit, the data cell after transmitter 10 sends and leans on than data-oriented unit in these sequences.For example, if adopt the flow process control based on window, the reception of the confirmation of the data-oriented unit in sequence means one or more data cells that can send after leaning in sequence, wherein, depend on and send how many data cells, this data cell after leaning on can comprise the next data cell in sequence, or can be in sequence backward some data cells start.
Get back to the example of Fig. 6, tentation data unit 603 on the first receiver 61 incorrect reception (NACK) and on the second receiver 62 correctly receive (ACK).
In addition, because each of a general n receiver is preferably carried out the comparison of receiving status information and feedback response information, so determining the state information (NACK) that feedback response information (ACK) receives with it, the second receiver 62 do not mate.This produces wrong instruction, and it sends together with feedback response message 604_2, and feedback response message 604_2 also transmits the instruction of the correct reception of data cell 603.On the other hand, the first receiver 61 sends feedback message 604_1, and feedback message 604_1 transmits the instruction of incorrect reception (NACK).
After the mistake instruction receiving in message 604_2, transmitter 10 adopts message 605 to carry out the re-transmission of m data cell.Message 605 also comprises the feedback response information producing according to the accepting state feedback response information showing in feedback message 604_1 and 604_2, wherein, in the example of Fig. 6, suppose that transmitter 10 receives the instruction of incorrect reception on receiver 61 and the correct instruction receiving on transmitter 62, i.e. 61:NACK in Fig. 6 and 62:ACK.
Then, receiver 61 all correctly receives m data cell communicating by letter in 605 with 62, corresponding feedback message 606_1 and 606_2 is comprised and show the correct receiving status information (ACK) receiving.In example, can see, due to receiving status information and the feedback response information coupling of m+1 the data cell sending in communication 603, therefore the first receiver 61 and the second receiver 62 all do not respond the feedback response information receiving in data cell 605 and produce wrong instruction.Then, owing to receiving the instruction of correct reception of m and m+1, for example, can send m+2 data cell by transmitter 10, proceed another process.
Be noted that in the example of Fig. 6, in the example of Fig. 4, transmitter 10 is not taken in from its transmission buffer, to remove immediately or delete after the instruction of the correct reception that receives data-oriented unit and has sent data cell.After the instruction of correct reception that receives data-oriented unit, transmitter 10 for example can retain a certain amount of time by described data-oriented unit in its transmission buffer, the time quantum that the measurement for example relating to according to the signal post between transmitter 10 and multiple receiver or average round-trip time calculate.Or transmitter 10 can be retained in data-oriented unit in its transmission buffer, until receive the instruction of the predetermined quantity of the correct reception at least one of receiver, for example, until receive two instructions of correct reception.
In the grand diversity system of transmitter and multiple receivers, may there is following situation: transmitter receives an instruction above of correct reception, but, these indicate the mistake in one of them communication based on feedback message,, transmitter from the receiver of instruction that wherein receives correct reception one of them reality correctly do not receive corresponding data unit.In this case, wish to avoid occurring unnecessary re-transmission.If transmitter just shows the correct reception of perception in its feedback response information, thereby the receiver of discussing determines and do not mate and send wrong instruction, thereby transmitter is carried out and retransmitted, a kind of so unnecessary re-transmission of generation.Some modes of this situation are avoided in existence.
According to a kind of possibility, after receiving the receiving status information that shows the correct reception on k the receiver of at least number of thresholds in n receiver of data-oriented unit, transmitter forbids sending any receiver feedback response information relevant to the receiving status information of data-oriented unit, k is wherein integer, and 1<k≤n.In other words, if receive the correct reception instruction of number of thresholds, suppose that at least one receiver in fact correctly receives discussed data cell, make without any receiver feedback response information that sends that data cell.This has been avoided any re-transmission effectively.The value of K for example can be set to 2.
According to another alternative, as previously described, transmitter 10 comprises the 1st to n feedback response information in a message that sends to n receiver.But receiver arranges as follows: for the each value of the i from 1 to n, i receiver judges whether i receiving status information shows incorrect reception, and whether i feedback response information shows correct reception.In addition, whether i receiver inspection shows incorrect reception with the feedback response information that number of thresholds j other receiver that is different from i receiver is associated, and wherein j is integer, and 0<j<n.If meet two conditions, receiving status information shows incorrect reception and feedback response information shows that correct reception (, in the transmission of feedback message, there is mistake), if and number of thresholds j other receiver shows incorrect reception, wrong instruction is sent to transmitter 10, to make transmitter 10 carry out the re-transmission of described data cell.Like this, receiver carries out about the judgement that whether sends wrong instruction.Not mating to proofread and correct the reception on transmitter of the accepting state of the incorrect reception of this judgement based on from receiver, and the quantity of the instruction of the incorrect reception receiving based on transmitter.For example, j can be selected to and equal n-1, this means, if feedback response information hint transmitter is only from determining the instruction that the wrong receiver of discussing has occurred receives correct reception feedback message, re-transmission is looked like suitable, given receiver just sends wrong instruction.
According to another alternative, in transmitter, again carry out about the judgement whether retransmitting.In other words, system operates, and makes the each value for the i from 1 to n, if i receiving status information shows incorrect reception, and i feedback response information shows correct reception, and i receiver sends i wrong instruction to transmitter.If transmitter shows that to its transmission all receivers of the correct feedback response information receiving receive wrong instruction from it, transmitter retransmits data-oriented unit.In other words, if transmitter for example communicates with four receivers, and receive the feedback of a NACK and three ACK with respect to data-oriented unit, when all three receivers that it only receives ACK at transmitter to it provide wrong instruction, just carry out and retransmit.
The above description that is noted that grand diversity provides the remarkable advantage with respect to prior art.Grand diversity is for example applicable to the field of radio honeycomb communication system.If terminal is positioned at cell boarder, it can be operated to remain to the link of one or more base stations, to carry out soft handover.At uplink direction, terminal sends data cell to two or more base stations of the active set that belongs to peripheral base station.The all base stations that belong to this active set attempt receiving data block and received data block being decoded.Finally, the result that they receive is reported respectively to terminal again in base station.This for example can use the machine-processed agreement of the known HARQ (hybrid ARQ) of employing, be undertaken by wireless link.Each base station can send positive acknowledgement (ACK) or Negative Acknowledgement (NACK) according to the result that receives the decode process.If do not receive ACK in terminal, terminal is carried out and is retransmitted.A kind of mode that can imagine for the problem of avoiding causing because of garble is the communication allowing between base station, and still, this is expensive at aspect the stand-by period of introducing and control signal aspect.The another kind of solution that can imagine is to provide the second link layer ARQ agreement, the RLCAM for example operating on HARQ agreement (RLC affirmation mode).This second protocol is guaranteed data that can retransmission of lost, but it can introduce complexity.
In contrast, concept of the present invention is very simple, and improves conveying function, because the problem that the mistake in feedback message causes can be detected and eliminate.
Can see from the above description of the exchanges data between transmitter and one or more receiver, the present invention also can and embody by the form of the method for the method of control data unit sender, control data cell receiver in corresponding data unit sender or data cell receiver.
Fig. 7 explanation is for controlling the flow chart of basic skills embodiment of the data unit sender that communicates with one or more receivers, receiver 11,61 and 62 as previously described, data unit sender 10 as previously described.At step S71, data cell is sent to described receiver, after this at step S72, determine whether feedback message arrives.After the feedback message receiving from receiver, wherein feedback message comprise the data cell that sends in step S71 and show at least correct reception and the receiving status information of incorrect reception the two one of them, in step S73, read the receiving status information in received feedback message, and at step S74, feedback response information being sent to receiver, wherein said feedback response information shows the accepting state reading in step S73.
Describe and controlled other embodiment of the method for data unit sender in conjunction with Fig. 1 to 6 above, thereby do not needed to redescribe.
The present invention also can be presented as shown in Fig. 9, for send the data unit sender 90 of data cell to receiver 91.Data unit sender 90 may be for example the wireless terminal in cellular communication system, and receiver 91 may be corresponding base station.The control system that for example can be provided by processor 901 and memory 902 is provided the data unit sender 90 of Fig. 9.Data unit sender 90 also comprises other traditional element of dispensing device, and they are that technical staff is known, thereby without being described in detail.Control system 901,902 is arranged for to receiver 91 and sends data cell, and through arranging, make, after the feedback message receiving from receiver, the feedback response information that shows accepting state represented in received feedback message to be sent to receiver.Control system can by any suitably or expection mode, realize as any suitable combination of hardware, software or hardware and software.Be also noted that, the present invention also can be presented as computer program, comprising being loaded into programmable data unit dispensing device and carrying out one of them the computer program of said method of controlling data unit sender while moving therein.
The present invention also can be presented as from transmitter, as transmitter 10 to as described in control the method for data cell receiver, receiver 11 as previously described the transmission of receiver.An example of this control method is described in the flow chart of Fig. 8.At first, receiver determines whether and receives data cell at step S81.After receiving data cell, send the feedback message of the receiving status information that comprises data cell to transmitter at step S82, wherein receiving status information shows at least correct reception and incorrect reception the two one of them.After this,, at step S83, receiver is waited for feedback response.After the feedback response information receiving from transmitter, judge whether feedback response information and receiving status information that send, in feedback message show identical accepting state at step S82.If not, carry out error response procedure at step S815.
Below described other embodiment of the control method of data cell receiver, thereby do not needed to redescribe.
With reference to Fig. 9, can see, the present invention also can be presented as for the data cell receiver 91 from transmitter 90 receiving data units.Data cell receiver 91 comprises the control system that for example can be made up of processor 911 and memory 912.Data cell receiver 91 comprises technical staff known other traditional receiver element and parts, thereby without being described further.Control system 911,912 is arranged for the feedback message that sends the receiving status information that comprises received data cell to transmitter 90, and the state information that wherein received shows at least correct reception and incorrect reception the two one of them.Control system is also through arranging, and makes, receive the feedback response information of accepting state represented showing feedback message that transmitter receives from transmitter after, to judge whether receiving status information and feedback response information show identical accepting state.Control system can by any suitably or expection mode, realize as any suitable combination of hardware, software or hardware and software.
The present invention also can be presented as computer program, comprising the computer program of the control method of executing data unit receiver in the time being loaded into programmable data unit receiving system and moving therein.
Particularly preferably be concept of the present invention is applied to respectively as link layer protocol, as the transmission peer-to-peer of HARQ with receive transmitter and one or more receiver of peer-to-peer.In other words, the transmission mistake on monitoring and corrected link layer is more high-rise, as more more effective in the error of transmission in network or transport layer than monitoring and correction.For example, preferably, in the case of non-congested relevant loss of data, on link layer, retransmit, because for example TCP reacts to loss of data by initiating congestion control mechanism, this is not during due to congested causing may be disadvantageous in loss of data.
Although according in detail and preferred embodiment the present invention has been described, these are only for explaining the present invention, instead of will limit.Protection range is indicated in the appended claims.Reference numeral in claims is only used for making claim to be easier to read, and there is no restriction.
Claims (27)
1. a method of controlling described receiver the data cell from transmitter to data cell receiver transmits, comprises the following steps:
In response to the data cell receiving from described transmitter, described receiver sends feedback message to described transmitter, the determined receiving status information of receiver that described feedback message comprises described data cell, described receiving status information shows to receive and incorrect reception the two one of them described receiver at least correct;
Described receiver receives the feedback response information from described transmitter, and described feedback response information shows the accepting state that described transmitter is definite according to described feedback message;
Described receiver judges whether described feedback response information shows the accepting state identical with the determined described accepting state of described receiver; And
Show the accepting state different from the determined described accepting state of described receiver in response to definite described feedback response information, described receiver carries out error response procedure.
2. the method for claim 1, wherein described error response procedure comprises that sending mistake to described transmitter indicates.
3. method as claimed in claim 2, comprising: described receiver, after sending described wrong instruction, receives the re-transmission from the described data cell of described transmitter.
4. method as claimed in claim 2 or claim 3, comprising: more than sending described wrong instruction once.
5. the method for claim 1, wherein described error response procedure comprises according to the error coded in the next adaptive feedback message of the not number of matches between described feedback response information and the determined described accepting state of described receiver.
6. method as claimed in claim 5, comprising: adjust through-put power or the described coding of described feedback message, make described feedback message more be not easy to make mistakes.
7. the method as described in any one in claim above, wherein, described feedback response information is included in the part of data cell of redundancy encoding.
8. the method as described in any one in claim above, wherein, is encoded to described feedback response information than described receiving status information and more can prevents error of transmission.
9. the method as described in any one in claim above, wherein, described data unit transmission is the part of grand diversity transmission, in described grand diversity transmission, described data cell sends to multiple receivers from described transmitter.
10. method as claimed in claim 9, comprising: described receiver receives the message that comprises the feedback response information relevant to each receiver in described multiple receivers.
11. methods as claimed in claim 10, wherein, correct reception and showing incorrect reception for the described feedback response information of described receiver in the determined accepting state of described receiver, described method comprises: show incorrect reception in response to definite feedback response information relevant to other receiver of number of thresholds, described receiver sends wrong instruction to described transmitter.
12. methods as claimed in claim 10, comprising: in response to determining that at least the feedback message of described multiple receivers of number of thresholds shows correct reception, described transmitter forbids sending the feedback response information of described data cell.
13. methods as claimed in claim 10, comprising: in response to determining the mistake instruction that receives all receivers that from described transmitter, its transmission shown the correct feedback response information receiving, described transmitter retransmits described data cell.
14. 1 kinds for receiving the data cell receiver from the data cell of transmitter, comprises control system, and described set-up of control system becomes:
In response to the data cell receiving from described transmitter, send feedback message to described transmitter, the determined receiving status information of receiver that described feedback message comprises described data cell, described receiving status information shows to receive and incorrect reception the two one of them described receiver at least correct;
Receive the feedback response information from described transmitter, described feedback response information shows the accepting state that described transmitter is definite according to described feedback message;
Judge whether described feedback response information shows the accepting state identical with the determined described accepting state of described receiver; And
Show the accepting state different from the determined described accepting state of described receiver in response to definite described feedback response information, carry out error response procedure.
15. data cell receivers as claimed in claim 14, wherein, described error response procedure comprises that sending mistake to described transmitter indicates.
16. data cell receivers as claimed in claim 15, wherein, described set-up of control system becomes after sending described wrong instruction, receives the re-transmission from the described data cell of described transmitter.
17. data cell receivers as described in claim 15 or 16, wherein, more than described set-up of control system becomes to send described wrong instruction once.
18. data cell receivers as claimed in claim 14, wherein, described error response procedure comprises according to the not number of matches between described feedback response information and the determined described accepting state of described receiver carrys out the error coded in adaptive feedback message.
19. data cell receivers as claimed in claim 17, comprising: adjust through-put power or the described coding of described feedback message, make described feedback message more be not easy to make mistakes.
20. data cell receivers as described in any one in claim 14-19, wherein, described feedback response information is included in the part of data cell of redundancy encoding.
21. data cell receivers as described in any one in claim 14-20, wherein, are encoded to described feedback response information than described receiving status information and more can prevent error of transmission.
22. data cell receivers as described in any one in claim 14-21, wherein, described data unit transmission is the part of grand diversity transmission, in described grand diversity transmission, described data cell sends to multiple receivers from described transmitter.
23. data cell receivers as claimed in claim 22, wherein, described set-up of control system becomes to receive the message that comprises the feedback response information relevant to each receiver in described multiple receivers.
24. data cell receivers as claimed in claim 23, wherein, correct reception and showing incorrect reception for the described feedback response information of described receiver in the determined accepting state of described receiver, described set-up of control system becomes to show incorrect reception in response to definite feedback response information relevant to other receiver of number of thresholds, sends wrong instruction to described transmitter.
25. 1 kinds of computer programs, comprise the computer program of carrying out the method as described in any one in claim 1-11 in the time downloading and run on programmable data unit receiving system.
The grand diversity from data unit sender to multiple data cell receivers transmits, control the method for described data unit sender, comprise the following steps for 26. 1 kinds:
Each receiver in described multiple receivers sends data cell;
Receive the feedback message from the each receiver in described multiple receivers, described feedback message comprises that corresponding receiver is for the definite receiving status information of described data cell, and described receiving status information shows to receive and incorrect reception the two one of them described corresponding receiver at least correct;
Determine accepting state according to each described feedback message;
Determine whether that at least the described feedback message of the described receiver of number of thresholds shows correct reception;
In response to determining that its feedback message shows that the quantity of the correct described receiver receiving is less than described number of thresholds, each receiver in described multiple receivers sends feedback response information, and described feedback response information shows that described transmitter is according to the accepting state of the definite corresponding receiver of respective feedback message; And
In response to determining that its feedback message shows that the quantity of the correct described receiver receiving is at least described number of thresholds, forbids sending described feedback response information.
The grand diversity from data unit sender to multiple data cell receivers transmits, control the method for described data unit sender, comprise the following steps for 27. 1 kinds:
Each receiver in described multiple receivers sends data cell;
Receive the feedback message from the each receiver in described multiple receivers, described feedback message comprises that corresponding receiver is for the definite receiving status information of described data cell, and described receiving status information shows to receive and incorrect reception the two one of them described corresponding receiver at least correct;
Determine accepting state according to each described feedback message;
Send feedback response information to each described receiver, the described feedback response information that sends to given receiver shows the accepting state of transmitter for the definite described data cell of described given receiver;
Receive the one or more wrong instruction from described multiple receivers, described wrong instruction shows that the accepting state showing in described feedback response information is different from the determined accepting state of described corresponding receiver;
Determine whether the mistake instruction that receives all receivers that from described transmitter, its transmission shown the correct feedback response information receiving; And
In response to determining the mistake instruction that has received all receivers that from described transmitter, its transmission shown the correct feedback response information receiving, retransmit described data cell.
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| CN201410124016.3A CN103905169A (en) | 2005-08-24 | 2005-08-24 | Data unit transmission method |
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| CN201410124016.3A CN103905169A (en) | 2005-08-24 | 2005-08-24 | Data unit transmission method |
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| CNA2005800513868A Division CN101248611A (en) | 2005-08-24 | 2005-08-24 | Data cell conveying method |
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