CN107454625A - A kind of confirmation feedback information processing method and processing device of hybrid automatic repeat-request - Google Patents
A kind of confirmation feedback information processing method and processing device of hybrid automatic repeat-request Download PDFInfo
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Abstract
The invention discloses a kind of confirmation feedback information processing method and processing device of hybrid automatic repeat-request.Determine whether the first default subframe and the second default subframe are obscured according to subframe configuration information；If it happens obscure, then send situation according to the data of the described first default subframe or the second default subframe and retransmit the type that situation determines the feedback information that the described first default subframe and the second default subframe carry.The embodiment of the present invention situation can be sent according to data and re-transmission situation determines the descending HARQ feedback information type of descending conventional subframe and descending special subframe on PUCCH channels, and then reduce HARQ ACK flase drop, fallout ratio on PUCCH, make up the defects of 3GPP consensus standards exist in itself, the detection efficiency of HARQ ACK on PUCCH is improved, improves PUCCH demodulation performance.
Description
Technical Field
The present invention relates to communications technologies, and in particular, to a method and an apparatus for processing acknowledgement feedback information of a hybrid automatic repeat request.
Background
In a mobile communication system, the signal transmission fails due to the time-varying characteristics of the wireless channel and the influence of multipath fading on the signal transmission, as well as some unpredictable interference. Forward Error Correction (FEC) and automatic repeat request (ARQ) methods are generally used to perform error control, thereby ensuring quality of service. A Time-Division Duplex (TDD) Long Term Evolution (LTE) technology system combines FEC and ARQ, and uses FEC and ARQ in a Hybrid automatic repeat-request (HARQ) manner.
For the downlink hybrid automatic repeat request of LTE TDD, the Third generation partnership Project (3 GPP) standard defines 2 HARQ-Acknowledgement (ACK) feedback methods: binding (bundling), multiplexing (multiplexing). The HARQ multiplexing (multiplexing) mode is: the transmission result of the downlink subframe is determined by confirming the resource position and the feedback value of a Physical Uplink Control Channel (PUCCH) used for feedback, and two code words sent by the same downlink subframe of the same serving cell (serving cell) are subjected to logical and to obtain Acknowledgement/Negative Acknowledgement (ACK/NACK) information of the subframe. What performs HARQ multiplexing operation is a Downlink subframe belonging to the same HARQ feedback window, and a terminal (User Equipment, UE) determines how many bits of ACK/NACK information to transmit according to how many subframes have transmitted Downlink data or the number (M value) of Downlink assignment index values (K) in the HARQ feedback window.
In The existing 3GPP standard, when a HARQ-ACK multiplexing feedback mode is adopted on a PUCCH channel, HARQ-ACK feedback confusion between a downlink normal subframe and a downlink special subframe (DWPTS) and HARQ-ACK confusion between a downlink normal subframe and a normal subframe may occur. In this case, the base station (eNodeB) cannot correctly distinguish between them, and erroneous detection are likely to occur.
Disclosure of Invention
The invention provides a method and a device for processing acknowledgement feedback information of a hybrid automatic repeat request (HARQ), which are used for accurately detecting downlink HARQ feedback results of a downlink conventional subframe and a downlink special subframe on a Physical Uplink Control Channel (PUCCH).
In a first aspect, an embodiment of the present invention provides a method for processing acknowledgment feedback information of a hybrid automatic repeat request, including:
determining whether the first preset subframe and the second preset subframe are mixed up or not according to the subframe configuration information;
and if confusion occurs, determining the types of the feedback information carried by the first preset subframe and the second preset subframe according to the data transmission condition and the retransmission condition of the first preset subframe or the second preset subframe.
In a second aspect, an embodiment of the present invention further provides an apparatus for processing acknowledgment feedback information of a hybrid automatic repeat request, including:
the confusion determining unit is used for determining whether the first preset subframe and the second preset subframe are confused according to the subframe configuration information;
a feedback information type determining unit, configured to determine, if the confusion determining unit determines that confusion occurs, a type of feedback information carried by the first preset subframe and the second preset subframe according to a data transmission condition and a retransmission condition of the first preset subframe or the second preset subframe.
According to the embodiment of the invention, whether the first preset subframe and the second preset subframe are confused can be determined according to the subframe configuration information, and whether false detection and false detection are caused by the confusion of the first preset subframe and the second preset subframe can be further determined. When a first preset subframe and a second preset subframe are mixed, determining the types of feedback information carried by the first preset subframe and the second preset subframe according to the data transmission condition and the retransmission condition of the first preset subframe or the second preset subframe. In the prior art, the 3GPP protocol standard itself cannot find that the first preset subframe and the second preset subframe are confused, and cannot determine the type of the feedback information carried by the first preset subframe and the second preset subframe according to the data transmission condition and the retransmission condition of the first preset subframe or the second preset subframe, which results in higher false detection and false detection rate of the hybrid automatic repeat request on the PUCCH. The embodiment of the invention can determine the downlink HARQ feedback information types of the downlink conventional subframe and the downlink special subframe on the PUCCH according to the data sending condition and the retransmission condition, further reduce the false detection and the false detection rate of the HARQ-ACK on the PUCCH, make up the defects of the 3GPP protocol standard, improve the detection efficiency of the HARQ-ACK on the PUCCH and improve the demodulation performance of the PUCCH.
Drawings
Fig. 1 is a flowchart of a method for processing acknowledgment feedback information of a first harq according to a first embodiment of the present invention;
fig. 2 is a flowchart of a method for processing acknowledgment feedback information of a second harq according to a first embodiment of the present invention;
fig. 3 is a flowchart of a method for processing ack/nack information of a third harq according to a first embodiment of the present invention;
fig. 4 is a flowchart of a method for processing acknowledgment feedback information of a fourth harq according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for processing harq acknowledgment feedback information according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. The specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for processing feedback information for acknowledgement of hybrid automatic repeat request according to an embodiment of the present invention, where the embodiment is applicable to a situation of detecting downlink HARQ feedback results of a downlink normal subframe and a downlink special subframe on a PUCCH channel, and the method may be executed by a terminal for detecting downlink HARQ feedback results of a downlink normal subframe and a downlink special subframe on a PUCCH channel, where the terminal may be a personal computer, a smart phone, a tablet computer, or the like, and the method specifically includes the following steps:
and step 110, determining whether the first preset subframe and the second preset subframe are mixed up or not according to the subframe configuration information.
The first preset subframe and the second preset subframe are used for bearing confirmation feedback information. The subframe configuration information comprises subframe configuration parameters and feedback window length.
Specifically, when the HARQ adopts A multiplexing acknowledgement feedback mode, the subframe configuration parameter is A preset subframe configuration parameter, and the feedback window length is A preset feedback window length, determining whether the first preset subframe and the second preset subframe are confused according to two bit values of the feedback information, A PUCCH format used by HARQ- A/NCK feedback, and A PUCCH resource index number.
The preset subframe configuration parameter is subframe configuration parameter 2 in Table 10.1.3.1-1 of 36.213 protocol, and the preset feedback window length is 4.
The first preset subframe is a preset special subframe, and the second preset subframe is a first preset conventional subframe; correspondingly, the determining whether the first preset subframe and the second preset subframe are confused according to the two bit values of the feedback information, the PUCCH format used by the HARQ- A/NCK feedback and the number of the PUCCH resource index includes:
if the table 10.1.3-4 is according to the 36.213 protocol, according to b (0), b (1) is 1,0 andconfiguring, and mixing the special subframe and the normal subframe of the preset special subframe and the first preset normal subframe, wherein b (0) and b (1) represent two bit values of feedback information,the PUCCH format used by the hybrid automatic repeat request HARQ-A/NCK feedback is represented as PUCCH format 1b, and the PUCCH resource index used by the hybrid automatic repeat request HARQ-A/NCK feedback is numbered 1.
Or,
the first preset subframe is a second preset conventional subframe, and the second preset subframe is a third preset conventional subframe; correspondingly, the determining whether the first preset subframe and the second preset subframe are confused according to the two bit values of the feedback information, the PUCCH format used by the HARQ- A/NCK feedback and the number of the PUCCH resource index includes:
if according to the 36.213 protocol 10.1.3-4 tableAccording to b (0), b (1) is 0,1 andconfiguring, and confusion of the normal subframe and the normal subframe occurs between the second preset normal subframe and the third preset normal subframe, whereinThe PUCCH format used by the hybrid automatic repeat request HARQ-A/NCK feedback is represented as PUCCH format 1b, and the PUCCH resource index used by the hybrid automatic repeat request HARQ-A/NCK feedback is numbered 3.
In the existing 3GPP standard, when the HARQ-ACK multiplexing feedback mode is adopted on the PUCCH channel, at this time, the base station (eNodeB) side cannot correctly distinguish between them, which is prone to cause false detection and false detection, and the reason for the false detection and false detection is that there is confusion between the special subframe and the normal subframe (which may also be called as confusion between downlink special subframe and downlink normal subframe) and confusion between the normal subframe and the normal subframe (which may also be called as confusion between downlink normal subframe and downlink normal subframe). The reason for the confusion is that:
referring to table 1, when the subframe configuration is 2/7 (DSUDD/10: 2:2), that is, when the subframe configuration parameter in table 1 is 2, for uplink Subframes (SF) 2 and 7, each uplink subframe corresponds to HARQ-ACK feedback of 4 downlink subframes, and the feedback window M is 4, and there are 4K values. Wherein, Table 1 is the configuration Table of the Downlink subframe of TDD in the protocol, Table (Table) 10.1.3.1-1(Downlink association set index: { k:) of 36.213 protocol0,k1,…kM-1For TDD), table 1 "-" indicates no configuration. In table 1, 0-6 in the sub-frame configuration parameter column represents the sub-frame configuration types defined by seven 3GPP protocols. Subframe configuration bits 2/7 (DSUDD/10: 2:2) indicate that the second subframe and the seventh subframe in the uplink frame data are configured as special subframes, and the total number of the special subframes is two, and this configuration mode corresponds to subframe configuration parameter 2, i.e. one row of subframe configuration parameter 2 in table 1. In the row, the uplink subframe 2 and the uplink subframe 7 are two special subframes respectively, and the uplink subframe 2 and the uplink subframe 7 correspond to each otherThe HARQ-ACK feedback of the downlink subframe is 8, 7, 4, 6, 8, 7, 4, 6 respectively corresponding to different indexes k. Since feedback is performed through 8, 7, 4, and 6 subframes, it is known that the length of the feedback window is 4.
Table 1(Table 10.1.3.1-1)
Table 2(Table 10.1.3-4)
Table 2 shows the content of the feedback information when the feedback window is 4 and the configuration feedback information is 2 bits. B (0), b (1) indicates that the bit number fed back by the HARQ- A/NCK is 2 bits, and b (0) and b (1) respectively indicate that b (0) can be obtained after setting, wherein b (1) is 0, 1; or b (0), b (1) 1, 0; or b (0), b (1) is 0, 0; or b (0) and b (1) are 1 and 1. As can be seen from table 1, when subframe configuration 2 is performed, downlink HARQ- A/NCK is fed back on uplink subframes 2 and 7, and the corresponding K values are: k is a radical of0＝8、k1＝7、k2＝4、k36. According to the definition of 3GPP protocol, the time sequence relation of the downlink PDSCH and the downlink HARQ-A/NCK is n-K, namely n-K is the subframe number corresponding to the downlink subframe PDSCH.
When n is 2 (uplink subframe number):
2-8 ═ 4// subframe 4 corresponding to the last radio frame; wherein "-" represents a correspondence;
2-7 ═ 5// subframe 5 corresponding to the last radio frame;
2-4 ═ 8// subframe 8 corresponding to the last radio frame;
2-6 ═ 6// subframe 6 corresponding to the last radio frame.
When n is 7 (uplink subframe number):
7-8 ═ 9// subframe 9 corresponding to the last radio frame;
7-7 ═ 0// corresponds to subframe 0 of the same radio frame as the uplink subframe;
7-4 ═ 3// corresponds to subframe 3 of the same radio frame as the uplink subframe;
and 7-6 is 1// corresponds to the subframe 1 of the same radio frame as the uplink subframe.
Due to HARQ-ACK (i) ' i ' and { k ' in Table 10.1.3.1-10,k1,…kM-1M-1 is one-to-one, so based on Table 2, HARQ-ACK (0), HARQ-ACK (1), HARQ-ACK (2), HARQ-ACK (3), and SF 4/5/8/6; SF9/0/3/1 corresponds one to one. The correspondence relationship is shown in table 3 for more clear representation. Taking SF4(2-8) as an example, it indicates that HARQ-ACK (0) of the downlink subframe corresponding to feedback subframe SF2 is SF4, and it is SF4 because the corresponding relationship 2-8 is 4.
TABLE 3
Look up b (0) from table 2, b (1) is 1,0 andHARQ-ACK feedback of time, wherein feedback information of SF2 is shown in table 4, and feedback information of SF7 is shown in table 5. Wherein,the corner marks "0, 1, 2, 3" in the lower right corner of (A) indicate the number of PUCCH resource indexes used for HARQ-A/NCK feedback, i.e. km-1M-1 of (1). The corner mark in the upper left corner "(1)" indicates the PUCCH used for HARQ-A/NCK feedbackThe format is PUCCH format 1 b.
TABLE 4
TABLE 5
According to HARQ-ACK feedback on SF2 provided in table 4, when b (0), b (1) is 1,0 andin time, the base station (eNodeB) side cannot distinguish between HARQ-ACKs corresponding to SF8(HARQ-ACK (2)) and SF6(HARQ-ACK (3)). The reason is that the HARQ feedback result of HARQ-ACK (2) has three kinds: for the base station side, it cannot be accurately determined whether the current HARQ feedback is ACK or NACK/DTX. Similarly, according to the HARQ-ACK feedback at SF7 provided in table 5, b (0), b (1) is 1,0 andin time, the eNodeB side cannot distinguish between HARQ-ACKs corresponding to SF3(HARQ-ACK (2)) and SF1(HARQ-ACK (3)).
It can be seen that the subframes where confusion occurs are the preset special subframe SF1 and the first preset normal subframe SF3, which is referred to as special subframe and normal subframe confusion (also referred to as HARQ-ACK feedback confusion of DWPTS and downlink normal subframe) in this embodiment.
Similarly, look up b (0), b (1) is 0,1 andHARQ-ACK feedback of time, wherein feedback information of SF2 is shown in table 6, and feedback information of SF7 is shown in table 7.
TABLE 6
TABLE 7
According to HARQ-ACK feedback on SF2 provided in table 6, when b (0), b (1) is 0,1 andin time, the eNodeB side cannot distinguish between HARQ-ACKs corresponding to SF4(HARQ-ACK (2)) and SF5(HARQ-ACK (3)). According to HARQ-ACK feedback on SF7 provided in table 7, b (0), b (1) is 0,1 andin time, the eNodeB side cannot distinguish between HARQ-ACKs corresponding to SF9(HARQ-ACK (2)) and SF0(HARQ-ACK (3)).
It can be seen that the subframes where confusion occurs are the second regular subframe SF9 and the third regular subframe SF0, which is referred to as the confusion of the regular subframes and the regular subframes in the embodiment (also referred to as the HARQ-ACK feedback confusion of the downlink regular subframes and the downlink regular subframes). Optionally, a second normal subframe SF0 and a third normal subframe SF 9.
Illustratively, as shown in fig. 2, step 110 may be implemented as:
in step 201, the feedback mode of the hybrid automatic repeat request of the high-level configuration TDD is a multiplexing (multiplexing) mode. Step 202 is performed.
Step 202, determine whether the HARQ feedback window length M is 4 and the subframe configuration parameter is 2. If so, step 203 is performed. If not, step 204 is performed.
And step 203, determining whether the first preset subframe and the second preset subframe are confused according to the two bit values of the feedback information, the PUCCH format used by hybrid automatic repeat request HARQ-A/NCK feedback and the number of the PUCCH resource index.
Specifically, if the table is 10.1.3-4 according to the 36.213 protocol, according to b (0), b (1) is 1,0 andand configuring, and mixing the special subframe and the normal subframe when the preset special subframe and the first preset normal subframe occur. If the table 10.1.3-4 is according to the 36.213 protocol, according to b (0), b (1) is 0,1 andand configuring, and mixing the normal subframe and the normal subframe of the second preset normal subframe and the third preset normal subframe.
And step 204, processing according to a normal multiplexing (multiplexing) feedback flow.
And step 120, if confusion occurs, determining the types of the feedback information carried by the first preset subframe and the second preset subframe according to the data transmission condition and the retransmission condition of the first preset subframe or the second preset subframe.
Specifically, when confusion between the special sub-frame and the normal sub-frame occurs, as shown in fig. 3, step 120 can be implemented as:
step 301, if the special subframe is mixed with the normal subframe, judging whether the preset special subframe sends data or not. If the data is not sent, go to step 302; otherwise, if the data is transmitted, step 303 is performed.
Step 302, if the preset special subframe does not send data, the feedback information type carried by the first preset conventional subframe is processed according to ACK.
Specifically, when the DWPTS is configured as the special subframe configuration 0 and 5, the SF6/SF1 has no Physical Downlink Shared Channel (PDSCH) data transmission, and the HARQ-ACK feedback does not exist.
a) HARQ-ACK feedback usage for DWPTS SF6 and SF8Resource indexingAnd b (0), b (1) is 1, 0.
b) HARQ-ACK feedback usage for DWPTS SF1 and SF3Resource indexingAnd b (0), b (1) is 1, 0.
a) B) normal subframes SF8, SF3 under two scenarios are processed by ACK, i.e. the final HARQ-ACK (0) - - -HARQ-ACK (2) is fed back as ACK/ACK.
Step 303, if the preset special subframe sends data, judging whether the preset special subframe and the first preset conventional subframe are retransmission or initial transmission, and determining the type of the feedback information according to the transmission condition.
Specifically, if the preset special subframe sends data and the preset special subframe and the first preset conventional subframe are both primary transmission, then:
(1) and calculating a first MCS and a second MCS, wherein the first MCS is the MCS corresponding to the preset special subframe, and the second MCS is the MCS corresponding to the first preset conventional subframe.
(2) And calculating the MCS difference value according to the first MCS and the second MCS.
(3) And if the MCS difference is larger than a preset threshold value, the first preset conventional subframe is processed according to NACK.
(4) And if the MCS difference is less than or equal to the preset threshold value, processing the preset special subframe according to NACK.
The MCS refers to a Modulation and Coding Scheme (MCS), and may be calculated according to a downlink adaptive Coding and Modulation Scheme algorithm. This is described only briefly: and the UE reports a downlink CQI value to the base station side according to the measured quality of the downlink, and the base station side selects a proper downlink MCS as a coding modulation mode of downlink data transmission of the downlink subframe according to the detected downlink CQI value and in combination with the principle that the downlink error code does not exceed 10%.
And 304, if the preset special subframe and the first preset conventional subframe both send data, the preset special subframe is primary transmission, and the first preset conventional subframe is retransmission, the preset special subframe is processed according to NACK.
Preferably, the special subframe is preset to transmit data.
305, if the preset special subframe sends data and both the preset special subframe and the first preset conventional subframe are retransmitted, comparing the retransmission times of the preset special subframe and the first preset conventional subframe, and processing the subframe with less retransmission times according to NACK; and if the retransmission times of the preset special subframe and the first preset conventional subframe are the same, processing the preset special subframe and the first preset conventional subframe according to NACK.
By the method shown in fig. 3, when the special subframe is confused with the normal subframe, the type of the feedback information can be determined to be performed based on factors such as transmission reliability of priority guarantee retransmission, and the like, so that the identification rate is improved.
Specifically, when the normal subframe is confused with the normal subframe, as shown in fig. 4, step 120 may be implemented as:
step 401, if the normal subframe is confused with the normal subframe, acquiring data transmission conditions of a second preset normal subframe and a third preset normal subframe.
And step 402, if the second preset conventional subframe does not send data, processing the third preset conventional subframe according to ACK.
Step 403, if the second preset conventional subframe and the third preset conventional subframe both transmit data and both the second preset conventional subframe and the third preset conventional subframe are primary transmission, both the second preset conventional subframe and the third preset conventional subframe are processed according to NACK.
And step 404, if the second preset conventional subframe and the third preset conventional subframe both send data, the second preset conventional subframe is initial transmission, and the third preset conventional subframe is retransmission, the second preset conventional subframe is processed according to NACK.
Step 405, if the second preset conventional subframe transmits data and both the second preset conventional subframe and the third preset conventional subframe are retransmitted, comparing the retransmission times of the second preset conventional subframe and the third preset conventional subframe, and processing the subframe with less retransmission times according to NACK; and if the retransmission times of the second preset conventional subframe and the third preset conventional subframe are the same, processing the second preset conventional subframe and the third preset conventional subframe according to NACK.
By the method shown in fig. 4, when the normal subframe is confused with the normal subframe, the type of the feedback information can be determined to be performed based on factors such as transmission reliability of priority guarantee retransmission, and the like, so that the identification rate is improved.
As can be seen from steps 303 and 304, and from steps 404 and 405, determining the types of the feedback information carried by the first preset subframe and the second preset subframe according to the data transmission condition and the retransmission condition of the first preset subframe or the second preset subframe includes:
if the first preset subframe and the second preset subframe both send data, the first preset subframe is initial transmission, and the second preset subframe is retransmission, the first preset subframe is processed according to NACK;
if the first preset subframe sends data and both the first preset subframe and the second preset subframe are retransmitted, comparing the retransmission times of the first preset subframe and the second preset subframe, and processing the subframe with less retransmission times according to NACK; and if the retransmission times of the first preset subframe and the second preset subframe are the same, processing the first preset subframe and the second preset subframe according to NACK.
The above embodiments are further described below with a specific usage scenario:
the RRC configured AckNackFeedBackMode is a multiplexing mode and subframe configuration 2. And when the value of the HARQ-ACK feedback window M is larger than 1 and smaller than 4, the normal multiplex HARQ-ACK feedback process is carried out. And when the value of the HARQ-ACK feedback window M is equal to 4, the multiplexing HARQ-ACK feedback optimization process is carried out. The feedback optimization process of the multiplexing HARQ-ACK is shown in the step 2-3.
DWPTS and downlink regular subframe confusion
1) DWPTS non-data transmission
That is, when the DWPTS is configured as the special subframe configuration 0 and 5, the SF6/SF1 has no Physical Downlink Shared Channel (PDSCH) data transmission, and the HARQ-ACK feedback does not exist.
a) HARQ-ACK feedback usage for DWPTS SF6 and SF8Resource indexingAnd b (0), b (1) is 1, 0.
b) HARQ-ACK feedback usage for DWPTS SF1 and SF3Resource indexingAnd b (0), b (1) is 1, 0.
a) B) normal subframes SF8, SF3 under two scenarios are processed by ACK, i.e. the final HARQ-ACK (0) - - -HARQ-ACK (2) is fed back as ACK/ACK.
2) DWPTS data transmission
I.e. DWPTS configuration is not special subframe configuration 0, 5.
a) DWPTS SF6& SF8, SF1& SF3 are the first pass.
-calculating the difference between the DWPTS SF6 code Modulation Scheme (MCS) and the SF8MCS, SF1MCS and SF3 MCS.
-comparing the calculated MCS difference with an MCS difference threshold (eNodeB side configuration). If the difference is greater than the threshold, feeding back NACK by the downlink conventional subframes SF8 and SF 3; if the difference is smaller than the threshold, the SF6 and the SF1 feed back NACK.
b) SF6 initial transmission & SF8 retransmission, SF1 initial transmission & SF3 retransmission.
The SF6, SF1 process on NACK, i.e. the final HARQ-ACK (0) - - -HARQ-ACK (3) feedback is ACK/NACK.
c) SF6 retransmission & SF8 retransmission, SF1 retransmission & SF3 retransmission.
And judging according to the retransmission times: feeding back NACK (negative acknowledgement) by subframes with less retransmission times; the retransmission times are the same, and NACK is fed back by both subframes.
3. Downlink regular subframe and downlink regular subframe confusion
HARQ-ACK feedback usage of SF4 and SF5Resource indexingAnd b (0), b (1) is 1, 0; HARQ-ACK feedback usage of SF9 and SF0Resource indexingAnd b (0), b (1) is 0, 1.
1) One subframe of SF4& SF5 has no downlink PDSCH scheduling, and one subframe of SF9& SF0 has no downlink PDSCH scheduling, and HARQ feedback of the subframe having downlink PDSCH scheduling is ACK.
2) And normal downlink scheduling is carried out on four subframes SF4& SF5 and SF9& SF 0.
a) SF4& SF5 and SF9& SF0 are both initial transmissions, and the corresponding HARQ feedback is NACK.
b) One of SF4& SF5 is initial transmission and one is retransmission, one of SF9& SF0 is initial transmission and one is retransmission, and HARQ feedback corresponding to an initial transmission subframe is NACK.
c) SF4 retransmission & SF5 retransmission, SF9 retransmission & SF0 retransmission.
And judging according to the retransmission times: HARQ feedback corresponding to the sub-frame with less retransmission times is NACK; the retransmission times are the same, and NACK is fed back by both subframes.
The embodiment provides a method for determining an ACK feedback information type with a feedback window of 4 and a subframe configuration of 2 in a TDD LTE subframe configuration 2HARQ multiplexing manner, and specifically determines whether a first preset subframe and a second preset subframe are confused according to subframe configuration information, and further determines whether false detection and false detection are caused by confusion of the first preset subframe and the second preset subframe. When a first preset subframe and a second preset subframe are mixed, determining the types of feedback information carried by the first preset subframe and the second preset subframe according to the data transmission condition and the retransmission condition of the first preset subframe or the second preset subframe. In the prior art, the 3GPP protocol standard itself cannot find that the first preset subframe and the second preset subframe are confused, and cannot determine the type of the feedback information carried by the first preset subframe and the second preset subframe according to the data transmission condition and the retransmission condition of the first preset subframe or the second preset subframe, which results in higher false detection and false detection rate of the hybrid automatic repeat request on the PUCCH. According to the embodiment, the downlink HARQ feedback information types of the downlink conventional subframe and the downlink special subframe on the PUCCH can be determined according to the data sending condition and the retransmission condition, so that the false detection and the false detection rate of the HARQ-ACK on the PUCCH are reduced, the defects of the 3GPP protocol standard are overcome, the detection efficiency of the HARQ-ACK on the PUCCH is improved, and the demodulation performance of the PUCCH is improved.
Example two
Fig. 5 is a schematic structural diagram of an apparatus for processing harq acknowledgement feedback information according to a second embodiment of the present invention, including:
an confusion determining unit 11, configured to determine whether a first preset subframe and a second preset subframe are confused according to the subframe configuration information;
a feedback information type determining unit 12, configured to determine, if the confusion determining unit 11 determines that confusion occurs, a type of feedback information carried by the first preset subframe and the second preset subframe according to a data transmission condition and a retransmission condition of the first preset subframe or the second preset subframe.
Further, the confusion determining unit 11 is specifically configured to, when the HARQ adopts A multiplexing acknowledgement feedback mode, and the subframe configuration parameter is A preset subframe configuration parameter, and the feedback window length is A preset feedback window length, determine whether confusion occurs between the first preset subframe and the second preset subframe according to two bit values of the feedback information, A PUCCH format used for HARQ- A/NCK feedback, and A PUCCH resource index number.
Further, the first preset subframe is a preset special subframe, and the second preset subframe is a first preset conventional subframe; accordingly, the confusion determination unit 11 comprises a special sub-frame and regular sub-frame confusion determination sub-unit,
the special subframe confusion determination subunit is configured to determine, if the 10.1.3-4 table is in accordance with the 36.213 protocol, b (0) by b (1) being 1,0 andconfiguring, and mixing the special subframe and the normal subframe of the preset special subframe and the first preset normal subframe, wherein b (0) and b (1) represent two bit values of feedback information,the PUCCH format used by the hybrid automatic repeat request HARQ-A/NCK feedback is represented as PUCCH format 1b, and the PUCCH resource index used by the hybrid automatic repeat request HARQ-A/NCK feedback is numbered 1.
Or,
the first preset subframe is a second preset conventional subframe, and the second preset subframe is a third preset conventional subframe; accordingly, the confusion determination unit 11 comprises a normal subframe and normal subframe confusion determination subunit,
the normal subframe confusion determination subunit is configured to determine, if the 10.1.3-4 table according to the 36.213 protocol is satisfied, according to b (0), b (1) is 0,1, andconfiguring, and confusion of the normal subframe and the normal subframe occurs between the second preset normal subframe and the third preset normal subframe, whereinThe PUCCH format used by the hybrid automatic repeat request HARQ-A/NCK feedback is represented as PUCCH format 1b, and the PUCCH resource index used by the hybrid automatic repeat request HARQ-A/NCK feedback is numbered 3.
Further, the feedback information type determining unit 12 is specifically configured to:
if the special subframe confusion determination subunit determines that the special subframe is confused with the conventional subframe, judging whether the preset special subframe sends data or not;
and if the preset special subframe does not send data, processing the feedback information type carried by the first preset conventional subframe according to ACK.
Further, the feedback information type determining unit 12 is further configured to:
if the preset special subframe sends data and the preset special subframe and the first preset conventional subframe are both initially transmitted, calculating a first MCS and a second MCS, wherein the first MCS is an MCS corresponding to the preset special subframe, and the second MCS is an MCS corresponding to the first preset conventional subframe;
calculating an MCS difference value according to the first MCS and the second MCS;
if the MCS difference is larger than a preset threshold value, the first preset conventional subframe is processed according to NACK;
and if the MCS difference is less than or equal to the preset threshold value, processing the preset special subframe according to NACK.
Further, the feedback information type determining unit 12 is specifically configured to:
if the normal subframe and normal subframe confusion determining subunit determines that the normal subframe and normal subframe confusion occurs, acquiring data transmission conditions of the second preset normal subframe and the third preset normal subframe;
and if the second preset conventional subframe does not send data, processing the third preset conventional subframe according to ACK.
Further, the feedback information type determining unit 12 is further configured to:
and if the second preset conventional subframe and the third preset conventional subframe both send data and are primarily transmitted, processing the second preset conventional subframe and the third preset conventional subframe according to NACK.
Further, the feedback information type determining unit 12 is specifically configured to:
if the first preset subframe and the second preset subframe both send data, the first preset subframe is initial transmission, and the second preset subframe is retransmission, the first preset subframe is processed according to NACK;
if the first preset subframe sends data and both the first preset subframe and the second preset subframe are retransmitted, comparing the retransmission times of the first preset subframe and the second preset subframe, and processing the subframe with less retransmission times according to NACK; and if the retransmission times of the first preset subframe and the second preset subframe are the same, processing the first preset subframe and the second preset subframe according to NACK.
The device can execute the method provided by the first embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided in the first embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (16)
1. A method for processing acknowledgement feedback information of hybrid automatic repeat request (HARQ) is characterized by comprising the following steps:
determining whether the first preset subframe and the second preset subframe are mixed up or not according to the subframe configuration information;
and if confusion occurs, determining the types of the feedback information carried by the first preset subframe and the second preset subframe according to the data transmission condition and the retransmission condition of the first preset subframe or the second preset subframe.
2. The method of claim 1, wherein the determining whether the first subframe and the second subframe are confused according to the subframe configuration information comprises:
when the hybrid automatic repeat request adopts A multiplexing acknowledgement feedback mode, the subframe configuration parameter is A preset subframe configuration parameter, and the feedback window length is A preset feedback window length, determining whether the first preset subframe and the second preset subframe are confused according to two bit values of feedback information, A PUCCH format used by hybrid automatic repeat request HARQ-A/NCK feedback and the serial number of PUCCH resource indexes.
3. The HARQ acknowledgement feedback information processing method according to claim 2,
the first preset subframe is a preset special subframe, and the second preset subframe is a first preset conventional subframe; correspondingly, the determining whether the first preset subframe and the second preset subframe are confused according to the two bit values of the feedback information, the PUCCH format used by the HARQ- A/NCK feedback and the number of the PUCCH resource index includes:
if the table 10.1.3-4 is according to the 36.213 protocol, according to b (0), b (1) is 1,0 andconfiguring, and mixing the special subframe and the normal subframe of the preset special subframe and the first preset normal subframe, wherein b (0) and b (1) represent two bit values of feedback information,the PUCCH format used by the hybrid automatic repeat request HARQ-A/NCK feedback is represented as PUCCH format 1b, and the PUCCH resource index used by the hybrid automatic repeat request HARQ-A/NCK feedback is numbered 1.
Or,
the first preset subframe is a second preset conventional subframe, and the second preset subframe is a third preset conventional subframe; correspondingly, the determining whether the first preset subframe and the second preset subframe are confused according to the two bit values of the feedback information, the PUCCH format used by the HARQ- A/NCK feedback and the number of the PUCCH resource index includes:
if the table 10.1.3-4 is according to the 36.213 protocol, according to b (0), b (1) is 0,1 andconfiguring, and confusion of the normal subframe and the normal subframe occurs between the second preset normal subframe and the third preset normal subframe, whereinThe PUCCH format used by the hybrid automatic repeat request HARQ-A/NCK feedback is represented as PUCCH format 1b, and the PUCCH resource index used by the hybrid automatic repeat request HARQ-A/NCK feedback is numbered 3.
4. The method according to claim 3, wherein the determining the types of the feedback information carried by the first predetermined subframe and the second predetermined subframe according to the data transmission condition and the retransmission condition of the first predetermined subframe or the second predetermined subframe comprises:
if the special subframe is confused with the conventional subframe, judging whether the preset special subframe sends data or not;
and if the preset special subframe does not send data, processing the feedback information type carried by the first preset conventional subframe according to ACK.
5. The method of claim 4, further comprising, after determining whether the predetermined special subframe transmits data, the step of:
if the preset special subframe sends data and the preset special subframe and the first preset conventional subframe are both initially transmitted, calculating a first MCS and a second MCS, wherein the first MCS is an MCS corresponding to the preset special subframe, and the second MCS is an MCS corresponding to the first preset conventional subframe;
calculating an MCS difference value according to the first MCS and the second MCS;
if the MCS difference is larger than a preset threshold value, the first preset conventional subframe is processed according to NACK;
and if the MCS difference is less than or equal to the preset threshold value, processing the preset special subframe according to NACK.
6. The method according to claim 3, wherein the determining the types of the feedback information carried by the first predetermined subframe and the second predetermined subframe according to the data transmission condition and the retransmission condition of the first predetermined subframe or the second predetermined subframe comprises:
if the conventional subframe is confused with a conventional subframe, acquiring data transmission conditions of the second preset conventional subframe and the third preset conventional subframe;
and if the second preset conventional subframe does not send data, processing the third preset conventional subframe according to ACK.
7. The method of claim 6, further comprising, after obtaining the data transmission status of the second and third pre-determined regular subframes, the step of:
and if the second preset conventional subframe and the third preset conventional subframe both send data and are primarily transmitted, processing the second preset conventional subframe and the third preset conventional subframe according to NACK.
8. The method according to claim 3, wherein the determining the types of the feedback information carried by the first predetermined subframe and the second predetermined subframe according to the data transmission condition and the retransmission condition of the first predetermined subframe or the second predetermined subframe comprises:
if the first preset subframe and the second preset subframe both send data, the first preset subframe is initial transmission, and the second preset subframe is retransmission, the first preset subframe is processed according to NACK;
if the first preset subframe sends data and both the first preset subframe and the second preset subframe are retransmitted, comparing the retransmission times of the first preset subframe and the second preset subframe, and processing the subframe with less retransmission times according to NACK; and if the retransmission times of the first preset subframe and the second preset subframe are the same, processing the first preset subframe and the second preset subframe according to NACK.
9. An acknowledgement feedback information processing apparatus for hybrid automatic repeat request, comprising:
the confusion determining unit is used for determining whether the first preset subframe and the second preset subframe are confused according to the subframe configuration information;
a feedback information type determining unit, configured to determine, if the confusion determining unit determines that confusion occurs, a type of feedback information carried by the first preset subframe and the second preset subframe according to a data transmission condition and a retransmission condition of the first preset subframe or the second preset subframe.
10. The apparatus according to claim 9, wherein the confusion determining unit is specifically configured to determine whether the first pre-configured subframe and the second pre-configured subframe are confused according to two bit values of the feedback information, A PUCCH format used for HARQ- A/NCK feedback, and A PUCCH resource index number when the HARQ- A/NCK feedback is performed in A multiplexed ack feedback manner and the subframe configuration parameter is A pre-configured subframe configuration parameter and the feedback window length is A pre-configured feedback window length.
11. The HARQ acknowledgement feedback information processing apparatus according to claim 10,
the first preset subframe is a preset special subframe, and the second preset subframe is a first preset conventional subframe; accordingly, the confusion determination unit comprises a special sub-frame and regular sub-frame confusion determination sub-unit,
the special subframe confusion determination subunit is configured to determine, if the 10.1.3-4 table is in accordance with the 36.213 protocol, b (0) by b (1) being 1,0 andconfiguring, and mixing the special subframe and the normal subframe of the preset special subframe and the first preset normal subframe, wherein b (0) and b (1) represent two bit values of feedback information,the PUCCH format used by the hybrid automatic repeat request HARQ-A/NCK feedback is represented as PUCCH format 1b, and the PUCCH resource index used by the hybrid automatic repeat request HARQ-A/NCK feedback is numbered 1.
Or,
the first preset subframe is a second preset conventional subframe, and the second preset subframe is a third preset conventional subframe; accordingly, the confusion determination unit comprises a normal subframe and a normal subframe confusion determination subunit,
the normal subframe confusion determination subunit is configured to determine, if the 10.1.3-4 table according to the 36.213 protocol is satisfied, according to b (0), b (1) is 0,1, andconfiguring, if so, the second preset normal subframe and the first preset normal subframeThe third preset normal subframe is confused with the normal subframe, whereinThe PUCCH format used by the hybrid automatic repeat request HARQ-A/NCK feedback is represented as PUCCH format 1b, and the PUCCH resource index used by the hybrid automatic repeat request HARQ-A/NCK feedback is numbered 3.
12. The apparatus according to claim 11, wherein the feedback information type determining unit is specifically configured to:
if the special subframe confusion determination subunit determines that the special subframe is confused with the conventional subframe, judging whether the preset special subframe sends data or not;
and if the preset special subframe does not send data, processing the feedback information type carried by the first preset conventional subframe according to ACK.
13. The apparatus according to claim 12, wherein the feedback information type determining unit is further configured to:
if the preset special subframe sends data and the preset special subframe and the first preset conventional subframe are both initially transmitted, calculating a first MCS and a second MCS, wherein the first MCS is an MCS corresponding to the preset special subframe, and the second MCS is an MCS corresponding to the first preset conventional subframe;
calculating an MCS difference value according to the first MCS and the second MCS;
if the MCS difference is larger than a preset threshold value, the first preset conventional subframe is processed according to NACK;
and if the MCS difference is less than or equal to the preset threshold value, processing the preset special subframe according to NACK.
14. The apparatus according to claim 11, wherein the feedback information type determining unit is specifically configured to:
if the normal subframe and normal subframe confusion determining subunit determines that the normal subframe and normal subframe confusion occurs, acquiring data transmission conditions of the second preset normal subframe and the third preset normal subframe;
and if the second preset conventional subframe does not send data, processing the third preset conventional subframe according to ACK.
15. The apparatus according to claim 14, wherein the feedback information type determining unit is further configured to:
and if the second preset conventional subframe and the third preset conventional subframe both send data and are primarily transmitted, processing the second preset conventional subframe and the third preset conventional subframe according to NACK.
16. The apparatus according to claim 11, wherein the feedback information type determining unit is specifically configured to:
if the first preset subframe and the second preset subframe both send data, the first preset subframe is initial transmission, and the second preset subframe is retransmission, the first preset subframe is processed according to NACK;
if the first preset subframe sends data and both the first preset subframe and the second preset subframe are retransmitted, comparing the retransmission times of the first preset subframe and the second preset subframe, and processing the subframe with less retransmission times according to NACK; and if the retransmission times of the first preset subframe and the second preset subframe are the same, processing the first preset subframe and the second preset subframe according to NACK.
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