CN101582755A - Method, device and system for feeding back response information - Google Patents
Method, device and system for feeding back response information Download PDFInfo
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- CN101582755A CN101582755A CNA2008100672944A CN200810067294A CN101582755A CN 101582755 A CN101582755 A CN 101582755A CN A2008100672944 A CNA2008100672944 A CN A2008100672944A CN 200810067294 A CN200810067294 A CN 200810067294A CN 101582755 A CN101582755 A CN 101582755A
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Abstract
The embodiment of the invention discloses a method for feeding back response information, which comprises the following steps: setting a first threshold of the number of sub data packets at a receiving terminal and receiving N sub data packets of a large data packet; carrying out cyclic redundancy coding CRC check for the N sub data packets respectively; and when the N is larger than the first threshold, respectively feeding back response information for the N sub data packets according to the result of CRC check. The embodiment of the invention also provides a corresponding device and a system. Through the method, the device and the system provided by the embodiment of the invention, the data packet receiving terminal transmits a feedback response bit map to a data packet, and a data packet transmission terminal only needs to transmit the data packets with correct CRC check according to the bit value of the response bit map, thereby the bandwidth resource is saved.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of technology of feeding back response information.
Background technology
At AIE (the Air Interface Evolution that adopts orthogonal frequency division multiplexi, AIE) and Long Term Evolution (Long Term Evolution, LTE) in the system, need to send the demand that big packet satisfies high rate user, because hard-wired restriction, for big packet greater than 6144 bits, transmitting terminal will be divided into a plurality of subdata bags, and each subdata bag is added cyclic redundancy check (CRC) (the Cyclic Redundancy Check of 24 bits respectively in physical layer, CRC), subdata bag behind the interpolation CRC is less than or equals 6144 bits, encodes again, interweave etc. and to send after the processing.Receiving terminal is after receiving each subdata bag, at first each subdata bag is carried out CRC check, after all subdata bags all pass through CRC check, again whole packet is carried out CRC check, and transmission response message, if whole packet by CRC check, is then replied affirmative acknowledgement (ACK) to transmitting terminal; Otherwise, send negative response (NACK) to transmitting terminal, after transmitting terminal is received NACK, at first whether the number of retransmissions of judgment data bag has reached maximum retransmission, if do not have, then retransmits all subdata bags, up to receiving ACK, or number of retransmissions reaches maximum retransmission.
Because the running time-frequency resource that big packet takies is more, and there is a frequency selective fading, all subdata bags can not be in the simultaneously correct CRC check of receiving terminal, therefore in the HARQ retransmission processes, when most subdata bags correct CRC check all, and has only seldom subdata bag correctly during CRC check, because transmitting terminal is not received ACK, need resend all subdata bags of this big packet one time, waste bandwidth resources.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of method, Apparatus and system of feeding back response information, to improve the transmitting efficiency of packet, saves bandwidth resources.
The embodiment of the invention provides a kind of method of feeding back response information, and this method comprises: at first thresholding of receiving terminal setting subdata bag number, receive the N sub data packets of big packet; Described N sub data packets is carried out the cyclic redundancy code CRC check respectively; As described N during greater than described first thresholding, according to the result of described CRC check to described N sub data packets feeding back response information respectively.
The embodiment of the invention provides a kind of method according to the response message handle packet, and this method comprises: when the subdata bag of big packet is counted N greater than first thresholding, obtain the response message of each subdata bag in the described big packet; If described response message is ACK, no longer send corresponding subdata bag; If described response message is NACK, and the number of retransmissions of corresponding subdata bag resends this subdata bag when not reaching maximum retransmission.
The embodiment of the invention provides a kind of receiving terminal, and this receiving terminal comprises: receiving element is used to receive the N sub data packets of big packet; Verification unit is used for the N sub data packets that described receiving element receives is carried out CRC check respectively; Processing unit is used for as described N during greater than first thresholding, according to the CRC check result of described verification unit, to described N sub data packets feeding back response information respectively.
The embodiment of the invention provides a kind of transmitting terminal, and this transmitting terminal comprises: receiving element is used for obtaining the response message of each subdata bag in the described big packet when the subdata bag of big packet is counted N greater than first thresholding; Processing unit, the response message that is used for obtaining when described receiving element is NACK, and the number of retransmissions of corresponding subdata bag sends this subdata bag when not reaching maximum retransmission.
The embodiment of the invention provides a kind of system, and this system comprises: receiving terminal, and this receiving terminal comprises: receiving element is used to receive the N sub data packets of big packet; Verification unit is used for the N sub data packets that described receiving element receives is carried out CRC check respectively; Processing unit is used for as described N during greater than first thresholding, according to the CRC check result of described verification unit, to described N sub data packets feeding back response information respectively; Transmitting terminal, this transmitting terminal comprises: receiving element is used for obtaining the response message of each subdata bag in the described big packet when the subdata bag of big packet is counted N greater than first thresholding; Processing unit, the response message that is used for obtaining when described receiving element is NACK, and the number of retransmissions of corresponding subdata bag sends this subdata bag when not reaching maximum retransmission.
In the methods, devices and systems that the embodiment of the invention provides, when the subdata bag number of big packet during greater than first thresholding, the packet receiving terminal is to each subdata bag feeding back response information of this big packet, the packet transmitting terminal is according to the response message of each subdata bag, only send the packet that does not have correct CRC check, saved bandwidth resources.
Description of drawings
Fig. 1 is the method flow schematic diagram of the feeding back response information that provides of the embodiment of the invention;
Fig. 2 is the structural representation of the receiving terminal that provides of the embodiment of the invention;
Fig. 3 is the structural representation of the transmitting terminal that provides of the embodiment of the invention;
Fig. 4 is the structural representation of the system that provides of the embodiment of the invention.
Embodiment
For the purpose that makes the embodiment of the invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the embodiment of the invention is further described.
Transmitting terminal is the transmission packet in the embodiment of the invention, and the entity that receives response message, and receiving terminal is the reception packet, and sends the entity of response message.Be that example describes with the LTE system below.
As shown in Figure 1, the embodiment of the invention provides a kind of method of feeding back response information, and this method comprises:
Step 102, receiving terminal are judged the number N of subdata bag and the relation of the first thresholding N1, when N＜N1, and execution in step 103, when N＞N1, execution in step 104.
Step 103, receiving terminal carry out CRC check to each subdata bag, and according to existing method to the transmitting terminal feeding back response information.
Step 104, receiving terminal carry out CRC check to each subdata bag, and to each subdata bag feeding back response information.
In the present embodiment, when not having Traffic Channel on the subframe of response message correspondence, on the control channel of this subframe, each subdata bag is fed back response message respectively.
In the present embodiment, when on the subframe of response message correspondence Traffic Channel being arranged, receiving terminal is replied bitmap according to method one composition, method one is specially: corresponding respectively one-tenth bit value of the response message of each subdata bag and composition are replied bitmap, with ACK correspondence 1, NACK correspondence 0, perhaps, with ACK correspondence 0, NACK correspondence 1.After all subdata bag CRC check are finished, N bit value composition replied bitmap, preset processing to replying bitmap then, this presets to handle and is specially: will reply bitmap and other signaling messages, as channel quality information (Channel Quality Information, CQI), add CRC after forming the signaling packet of control channel together, encode again, modulation, perhaps add CRC separately, encode again replying bitmap, modulation is perhaps encoded separately to each bit of replying in the bitmap, modulation, and the packet after will modulating and the packet on the Traffic Channel carry out multiplexingly, and sends packet after handling.
In the present embodiment, in order to improve the performance of system, the second thresholding N2 further is set, wherein said N2＞N1, and the relation of judgement N and N2, if N＜N2 is then at the packet that sends on the Traffic Channel of subframe after handling, if N＞N2, because reply bitmap this moment may be bigger, in order to reduce the proper communication of the Traffic Channel that influences subframe, preferably can be at the packet after send handling on the Dedicated Traffic Channel, this Dedicated Traffic Channel is distributed when the assignment ascending resource by the base station.
In the present embodiment, the value of N1 and N2 can by but be not limited to following method and obtain: carry out performance simulation, perhaps,, get the value that makes that whole network performance is best by the method for field experiment.Those skilled in the art can be configured to N=N1 in the Rule of judgment when judging the concerning of N and thresholding according to actual needs, and promptly Rule of judgment is N≤N1, or N 〉=N1, for N2, can do same processing.
In the present embodiment, if each bit of replying in the bitmap is encoded separately, is modulated, if control channel free time this moment, the bitmap of replying after the modulation can also be sent on control channel, save the resource of Traffic Channel, can select coded system this moment according to actual conditions, for example selects the coded system identical with the control channel of current system.
In the present embodiment, further, if all CRC check is correct for all subdata bags, then whole big packet is carried out CRC check, if big packet CRC check mistake then will be replied the bit value that bit positions all in the bitmap is the NACK correspondence, and this is replied bitmap handle according to the above-mentioned processing method that presets, and, on the Traffic Channel of subframe or Dedicated Traffic Channel, send the packet after handling according to the relation of N and N2.
After step 105, transmitting terminal receive response message, if receiving terminal is that then transmitting terminal is handled according to response message according to existing method according to the response message of existing method when N1 (be N＜) feedback; If receiving terminal is to each subdata bag feeding back response information, when transmitting terminal when control channel obtains N response message, then handle according to each response message, if promptly response message is ACK, no longer send the subdata bag of this ACK correspondence, if response message is NACK, and the number of retransmissions of the subdata bag of this NACK correspondence resends this subdata bag when not reaching maximum retransmission; When transmitting terminal obtains when replying bitmap from Traffic Channel, this Traffic Channel is the Traffic Channel or the Dedicated Traffic Channel of subframe, then transmitting terminal detects each bit value of replying in the bitmap, if the corresponding NACK of bit value, and the number of retransmissions of corresponding subdata bag does not reach maximum retransmission, then resend this subdata bag, if bit value corresponding A CK, no longer send corresponding subdata bag, the resource of this subdata bag can be used for sending new business datum, perhaps is used to send the subdata bag that response message is NACK.
The method that the embodiment of the invention provides is set the threshold value of subdata bag number at receiving terminal, the group number-of-packet satisfies when pre-conditioned, reply at each subdata bag, and form and to reply bitmap and send to transmitting terminal, then transmitting terminal is known the subdata bag that is not correctly decoded, and is retransmitted according to the bit information of replying in the bitmap, and do not need to correctly the subdata bag of CRC check retransmit, saved bandwidth resources.
The embodiment of the invention also provides a kind of receiving terminal, and this receiving terminal comprises receiving element 201, verification unit 202, processing unit 203, wherein,
Receiving element 201 is used for the N sub data packets that receiving end/sending end sends.
Verification unit 202 is used for described N sub data packets is carried out CRC check respectively.
Processing unit 203 is used for when N＞N1, according to the CRC check result of verification unit 202 to each subdata bag feeding back response information.
In the present embodiment, if do not have Traffic Channel on the subframe of response message correspondence, processing unit 203 also is used on the control channel of subframe the CRC check result according to verification unit 202, to each subdata bag feedback response message.
In the present embodiment, if on the subframe of response message correspondence Traffic Channel is arranged, processing unit 203, also be used for CRC check result according to verification unit 202, reply bitmap according to one composition of the method described in the foregoing description, preset processing according to the method described in the foregoing description to replying bitmap, and according to the relation of N and N2, on the Traffic Channel of subframe or Dedicated Traffic Channel, send the packet after presetting processing.
Processing unit 203, also be used for each bit of replying bitmap is encoded separately, and on control channel, send, perhaps each bit of replying in the bitmap is encoded separately, carry out the packet of replying on bitmap and the Traffic Channel behind the coding multiplexing, and according to the relation of N and N2, at the packet that sends on the Traffic Channel of subframe or the Dedicated Traffic Channel after multiplexing.
If all CRC check is correct for all subdata bags, verification unit 202 also is used for whole big packet is carried out CRC check, if CRC check mistake, processing unit 203 also is used for the CRC check result according to verification unit 202, this is replied in the bitmap bit value that N bit all is changed to the NACK correspondence, preset processing according to the method in the foregoing description to replying bitmap, and according to the relation of N and N2, on the Traffic Channel of subframe or Dedicated Traffic Channel, send the packet after handling.
In the present embodiment, processing unit 203 also is used for when N＜N1, according to the method for prior art to the transmitting terminal feeding back response information.
The method that the embodiment of the invention provides is set the threshold value of subdata bag number, the group number-of-packet satisfies when pre-conditioned, at each subdata bag feeding back response information, and when the subframe of response message correspondence has Traffic Channel, bitmap is replied in formation, send to the packet transmitting terminal, thus can be so that transmitting terminal be known the CRC check state of each packet.
The embodiment of the invention provides a kind of transmitting terminal, and this transmitting terminal comprises receiving element 301 and processing unit 302, wherein,
Receiving element 301 is used for obtaining the response message of each subdata bag in this big packet when the subdata bag of big packet is counted N＞N1.
Processing unit 302, the response message that is used for obtaining when described receiving element 301 is NACK, and the number of retransmissions of corresponding subdata bag resends this subdata bag when not reaching maximum retransmission.
In the present embodiment, if receiving terminal is the response message that sends each subdata bag on the Traffic Channel of subframe, then particularly, receiving element 301 is used for obtaining from Traffic Channel and replys bitmap, and obtains this and reply each bit value in the bitmap; Processing unit 302, if be used for the corresponding NACK of bit value that receiving element 301 obtains, and the number of retransmissions of corresponding subdata bag do not reach maximum retransmission, then resends this subdata bag, and when bit value corresponding A CK, then no longer resend corresponding subdata bag.
In the present embodiment, if receiving terminal is the response message that sends each subdata bag on the control channel of subframe, then particularly, receiving element 301, also be used for obtaining the response message of each subdata bag from control channel, processing unit 302, the response message that also is used for obtaining when receiving element 301 is NACK, and when the number of retransmissions of corresponding subdata bag does not reach maximum retransmission, resend this subdata bag, and when response message is ACK, then no longer resend corresponding subdata bag.
The packet transmitting terminal that the embodiment of the invention provides, when receiving the response message of feeding back at each subdata bag, can know the CRC check state of each subdata bag, and have only when response message is NACK, just send corresponding subdata bag, thereby saved bandwidth resources.
The embodiment of the invention also provides a kind of system, and this system comprises receiving terminal 401 and transmitting terminal 402 Hes, wherein,
Description among the concrete operations of receiving terminal 401 such as the above-mentioned embodiment is not described in detail at this.
Description among the concrete operations of transmitting terminal 402 such as the above-mentioned embodiment is not described in detail at this.
The method that the embodiment of the invention provides is set the threshold value of subdata bag number at receiving terminal, the group number-of-packet satisfies when pre-conditioned, reply at each subdata bag, transmitting terminal receives response message or gets access to when replying bitmap, can carry out respective handling according to the response message of each subdata bag, when promptly having only response message to be NACK, just retransmit corresponding subdata bag, thereby saved bandwidth resources, improved the efficiency of transmission of packet.
In the embodiment of the invention, receiving terminal is the base station, and transmitting terminal is a user terminal, and perhaps receiving terminal is a user terminal, and corresponding sending terminal is the base station.
The method that the embodiment of the invention provides, Apparatus and system are applicable to any communication system based on orthogonal frequency division multiplexi, as 802.16, LTE.
All or part of step in the embodiment of the invention method can instruct relevant hardware to finish by program, and described program can be stored in a kind of computer-readable recording medium.
The above; it only is the embodiment of the embodiment of the invention; but the protection range of the embodiment of the invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the embodiment of the invention.Therefore, the protection range of the embodiment of the invention should be as the criterion with the protection range of claim.
Claims (16)
1, a kind of method of feeding back response information is characterized in that, at first thresholding of receiving terminal setting subdata bag number, this method comprises:
Receive the N sub data packets of big packet;
Described N sub data packets is carried out the cyclic redundancy code CRC check respectively;
As described N during greater than described first thresholding, according to the result of described CRC check to described N sub data packets feeding back response information respectively.
2, the method for claim 1 is characterized in that, described to described N sub data packets respectively feeding back response information be specially:
If the subframe of described response message correspondence does not have Traffic Channel, on the control channel of described subframe, send the response message of described N sub data packets respectively.
3, the method for claim 1 is characterized in that, described to described N sub data packets respectively feeding back response information be specially:
If the subframe of described response message correspondence has Traffic Channel, the response message of described N sub data packets is distinguished N bit value of corresponding one-tenth, and described N bit value composition replied bitmap.
4, method as claimed in claim 3 is characterized in that, described N bit value of the corresponding respectively one-tenth of response message with described N sub data packets is specially: the bit value that each bit is changed to the response message correspondence of each subdata bag respectively;
Perhaps,
If the response message of all subdata bags all is ACK, described big packet is carried out CRC check, if the CRC check mistake, each bit all is changed to the bit value of NACK correspondence.
5, method as claimed in claim 4, it is characterized in that, described method also comprises: with described bitmap and other signaling messages composition signaling packet of replying, described signaling packet is added cyclic redundancy code CRC, and encode, modulate, perhaps the described bitmap of replying is added CRC, and encode, modulate, and the packet of data after will modulating and Traffic Channel carries out multiplexingly, sends on Traffic Channel.
6, method as claimed in claim 4, it is characterized in that, described method also comprises: described N bit of replying in the bitmap encoded respectively, modulated, and the bitmap of replying after will modulating sends on control channel, the data after perhaps will modulating and the packet of Traffic Channel carry out multiplexing, send on Traffic Channel.
7, as claim 5 or 6 described methods, it is characterized in that, set second thresholding of subdata bag number at receiving terminal, as N during less than described second thresholding, described Traffic Channel is the Traffic Channel of described subframe;
As N during greater than described second thresholding, described Traffic Channel is a Dedicated Traffic Channel;
Described second thresholding is greater than described first thresholding.
8, a kind of method according to the response message handle packet is characterized in that, described method comprises:
When the subdata bag of big packet is counted N greater than first thresholding, obtain the response message of each subdata bag in the described big packet;
If described response message is ACK, no longer send corresponding subdata bag;
If described response message is NACK, and the number of retransmissions of corresponding subdata bag resends this subdata bag when not reaching maximum retransmission.
9, a kind of receiving terminal is characterized in that, described receiving terminal comprises receiving element, verification unit, processing unit, wherein,
Receiving element is used to receive the N sub data packets of big packet;
Verification unit is used for the N sub data packets that described receiving element receives is carried out CRC check respectively;
Processing unit is used for as described N during greater than first thresholding, according to the CRC check result of described verification unit, to described N sub data packets feeding back response information respectively.
10, receiving terminal as claimed in claim 9 is characterized in that,
Described processing unit does not have Traffic Channel if also be used for the subframe of described response message correspondence, sends the response message of described N sub data packets on the control channel of described subframe respectively.
11, receiving terminal as claimed in claim 9 is characterized in that,
Described processing unit has Traffic Channel if also be used for the subframe of described response message correspondence, and the response message of described N sub data packets is distinguished N bit value of corresponding one-tenth, and described N bit value composition replied bitmap.
12, as receiving terminal as described in the claim 11, it is characterized in that,
Described processing unit also is used for each bit is changed to the bit value of the response message correspondence of each subdata bag;
Perhaps,
If all CRC check is correct for described N sub data packets, described verification unit also is used for described big packet is carried out CRC check, if CRC check mistake, described processing unit also is used for, according to the check results of described verification unit, described each bit of replying bitmap all is changed to the bit value of NACK correspondence.
13, receiving terminal as claimed in claim 12, it is characterized in that, described processing unit also is used for described bitmap and other signalings composition signaling packet of replying, described signaling packet is added cyclic redundancy code CRC, and encode, modulate, perhaps the described bitmap of replying is added CRC, and encode, modulate, and the packet of data after will modulating and Traffic Channel carries out multiplexingly, sends on Traffic Channel.
14, receiving terminal as claimed in claim 12, it is characterized in that, described processing unit also is used for described N bit of replying bitmap encoded respectively, modulated, also be used for the bitmap of replying after the modulation is sent on control channel, the data after perhaps will modulating and the packet of Traffic Channel carry out multiplexing, send on Traffic Channel.
15, a kind of transmitting terminal is characterized in that, described transmitting terminal comprises
Receiving element is used for obtaining the response message of each subdata bag in the described big packet when the subdata bag of big packet is counted N greater than first thresholding;
Processing unit, the response message that is used for obtaining when described receiving element is NACK, and the number of retransmissions of corresponding subdata bag sends this subdata bag when not reaching maximum retransmission.
16, a kind of system is characterized in that, described system comprises
As any described receiving terminal of claim among the claim 9-14; With,
Receiving terminal as claimed in claim 15.
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| CNA2008100672944A CN101582755A (en) | 2008-05-14 | 2008-05-14 | Method, device and system for feeding back response information |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401618A (en) * | 2013-08-01 | 2013-11-20 | 魏先民 | UWSN transmission method and system |
| CN103944820A (en) * | 2014-05-15 | 2014-07-23 | 东莞市联臣电子科技有限公司 | Data communication method, host, slave and communication system |
| CN115150648A (en) * | 2022-05-31 | 2022-10-04 | 海信视像科技股份有限公司 | Display device and message transmission method |
-
2008
- 2008-05-14 CN CNA2008100672944A patent/CN101582755A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401618A (en) * | 2013-08-01 | 2013-11-20 | 魏先民 | UWSN transmission method and system |
| CN103944820A (en) * | 2014-05-15 | 2014-07-23 | 东莞市联臣电子科技有限公司 | Data communication method, host, slave and communication system |
| CN115150648A (en) * | 2022-05-31 | 2022-10-04 | 海信视像科技股份有限公司 | Display device and message transmission method |
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Open date: 20091118 |