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Harq sending and receiving method, device and node

A sending method and technology of the sending end, applied in the field of communication, can solve the problems of downlink system throughput impact, no solution proposed, high HARQ information occupation overhead, etc.

Active Publication Date: 2020-04-07
ADVANCED STANDARD COMM LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] If there is only one error in the above-mentioned bound transport blocks, node 2 cannot determine which of the above-mentioned bound transport blocks detects an error according to the HARQ information fed back by node 1, and it is necessary to check the above-mentioned bound transport blocks for safety reasons. All retransmissions are performed, and this waste of resources will have a negative impact on the throughput of the downlink system
Moreover, the bound transport blocks have a strong correlation on the channel, and usually the channels of different carriers are independent. In the above related technology, when node 2 sends data to node 1 on multiple carriers, if still Using the method of bundling transport blocks to bind the HARQ information of transport blocks on multiple carriers, the negative impact on system throughput will be further amplified
[0008] Aiming at the problem of high overhead for feeding back HARQ information in related technologies, no effective solution has been proposed so far

Method used

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  • Harq sending and receiving method, device and node
  • Harq sending and receiving method, device and node
  • Harq sending and receiving method, device and node

Examples

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Effect test

Embodiment 1

[0142] The terminal (node ​​1) and the base station (node ​​2) agree to use M bits to feed back the HARQ information of N transport blocks, where the N transport blocks can be respectively located on I carriers, and carrier i (i=1, 2...I The number of transport blocks on ) is Q i , Suppose the number of correct transmission blocks detected by the terminal is k, where M is a positive integer not less than 2, N is a positive integer not less than 3, and satisfies:

[0143] 1i ≤N; 0≤k≤N.

[0144] For the above k transport blocks that are detected correctly, according to the indexes in the above N transport blocks corresponding to these transport blocks, there are a total of In this case, considering 0≤k≤N, there are a total of situation.

[0145] In the preferred embodiment of the present invention, node 1 determines the corresponding HARQ state according to a threshold U, where U is a positive integer and satisfies The threshold U can be agreed upon by node 2 and node 1...

Embodiment 2

[0154] Based on the method 1 above, set N=32 and M=21. Normally, the base station determines the coded transmission resource and the corresponding coding and modulation mode for a certain transmission block with the probability p that the transmission block is detected correctly according to the channel state between the base station and the terminal. A typical value of p is 0.9. Assuming that the probability of correct detection of each transmission block is independent of each other, then the probability Y(k) that the terminal detects that k transmission blocks are correct is:

[0155]

[0156] Figure 8 A schematic diagram of the probability distribution of Y(k) is given when N=32 and p=0.9. from Figure 8 It can be seen that the probability distribution of the number of correct transmission blocks detected by the terminal is not uniform, but concentrated on a few values ​​with a high probability. Figure 8 For example, the number of correctly detected transport block...

Embodiment 3

[0160] Based on the above method 2, the terminal (node ​​1) and the base station (node ​​2) agree to use M bits to feed back the HARQ information of N transport blocks. In this preferred embodiment, node 1 according to two thresholds U 1 and U 2 determine the corresponding HARQ state, where U 1 and U 2 (1≤U 1 ≤ U 2

[0161] Among them, the threshold U 1 and U 2 It can be agreed between node 2 and node 1, for example, node 2 determines U according to channel state information, scheduling strategy, etc. 1 and U 2 The value of is used to inform node 1 about U through signaling 1 and U 2 The value of , or both parties agree on U 1 and U 2 Equal to a value related to N, for example: U 1 and U 2 to satisfy And U 2 -U 1 The maximum corresponding value of .

[0162] When U 1 ≤k≤U 2 , each case corresponds to a HARQ state one by one (each state is represented by M bits, and the total situation). For other cases, total case with the rest One or more of the s...

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Abstract

The invention provides a HARQ sending and receiving method, device and node. Wherein, the method includes: detecting the reception status of N transmission blocks; according to the reception status, generating a first HARQ state value with a length of M bits, wherein each value of all values ​​of the first HARQ state value is one One corresponds to a reception situation of N transport blocks when k falls within the preset value range, k is the number of correctly received transport blocks among the received transport blocks, M, N, and k are integers, 2≤M< N, 0≤k≤N; send the first HARQ state value as HARQ information. The present invention solves the problem of high overhead for feeding back HARQ information, and reduces the overhead for feeding back HARQ information.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a hybrid automatic repeat request (HARQ) sending and receiving method, device and node. Background technique [0002] In order to improve the user's peak rate and user experience, node 1 (such as a terminal, or a base station) is often not limited to receiving data sent by node 2 (such as a base station, or a terminal) on one carrier or one process. Correspondingly, node 1 needs to feed back Hybrid Automatic Repeat Request (HARQ for short) information to node 2, that is, if the detection is correct for the transmission block on each carrier / process, it will feed back an acknowledgment ( Acknowledgment, ACK for short), otherwise, negative acknowledgment (Negative Acknowledgment, NACK for short). [0003] In the existing Long Time Evolution (LTE) system of the 3rd Generation Partnership Project (3GPP for short), the terminal (node ​​1) needs to configure the carrier according to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18
CPCH04L1/1806H04L1/1812H04L1/1864H04L1/18H04L1/1614H04L1/1621H04L1/1635H04L1/1825
Inventor 夏树强戴博左志松梁春丽
Owner ADVANCED STANDARD COMM LLC
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