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Feedback method and device

A technology of feedback information and division method, applied in the field of mobile communication, can solve the problem of high feedback overhead

Active Publication Date: 2016-04-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during retransmission, other error-free code blocks must also be retransmitted. The reason is that the ACK / NACK of the existing LTE system is based on TB feedback, and there is no A / N feedback based on CB. If it is based on CB feedback, The feedback overhead of uplink A / N is too large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0230] Embodiment one (method embodiment):

[0231] This embodiment proposes a feedback method, which is applied to the first transmission node, such as image 3 Shown, including:

[0232] Step 101: The first transmission node receives a signal containing a transmission block sent by a second transmission node; wherein, the transmission block includes K code blocks, and the K code blocks are divided into P code block sets; wherein , K and P are positive integers, K≥3, 2≤P≤K;

[0233] Step 102: The first transmission node obtains the status of P code block sets according to the signal including the transmission block;

[0234] Step 103: The first transmission node determines at least one type of feedback information from a preset feedback information set according to the status of the P code block sets;

[0235] Step 104: The first transmission node sends the determined feedback information to the second transmission node. Wherein, the feedback information set includes at least: correc...

example 1

[0280] In this example, the first transmission node is a terminal, and the second transmission node is a base station:

[0281] Step A1: The terminal receives the signal containing the transmission block sent by the base station, where the transmission block includes K=8 code blocks, and the 8 code blocks are divided into P=2 code block sets. Such as Figure 4 As shown, code block set (CBset) 1 includes code blocks CB1, CB2, CB3, and CB4; code block set 2 includes code blocks CB5, CB6, CB7, and CB8. In this example, the code block set adopts a continuous division method. The number of code block sets P=2 is configured by the base station, and the base station selects P=2 from a set of preset values ​​{2, 3, 4, 5}, and sends it to the terminal through downlink signaling.

[0282] Step A2: The terminal determines at least one type of feedback information from the feedback information set according to the status of the two code block sets, and sends the feedback information to the ba...

example 2

[0286] The difference between this example and example one is that, in this example, the number of code block sets P is determined by the size of the transmission block. In this example, the size of the transmission block belongs to the preset value interval, and the number of The number of code block sets corresponding to the value interval is P=2. At this time, the number P of code block sets does not need to be sent through signaling between the base station and the terminal.

[0287] Another difference between this example and the second example is that both code block set 1 and code block set 2 receive errors. At this time, the number of correct code block sets is less than the preset threshold 1, or the data of the error code block set is greater than The preset threshold is 1, or the correct rate of the code block set is lower than the preset threshold 0.5, or the error rate of the code block set is higher than the preset threshold 0.5. In this case, if the retransmitted d...

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Abstract

The invention provides a feedback method and device. The method comprises that a first transmission node receives a signal which includes a transmission block and is sent by a second transmission node, the transmission block comprises K code blocks, and the K code blocks belong to P code block sets; the first transmission node obtains the states of the P code block sets according to the signal including the transmission block; according to the states of the P code block sets, the first transmission node determines at least one type of feedback information in a preset feedback information set, and the feedback information set comprises correct indication information and n types of wrong indication information at least; and the first transmission node sends the determined feedback information to the second transmission node. According to the information, the amount of retransmitted data can be effectively reduced, and the efficiency of data retransmission is improved.

Description

Technical field [0001] The present invention relates to the field of mobile communication, in particular to a feedback method and device. Background technique [0002] In the existing LTE system, the physical layer data shared channel uses the transport block (TB) as the basic unit for data transmission. The receiving end judges whether the current TB is received correctly through the cyclic redundancy check code (CRC) of the TB. If the TB is received correctly, the receiving end feeds back an ACK message to the sending end. If the TB is not received correctly, the receiving end feeds back a NACK message to the sending end. After receiving the NACK message, the sending end will retransmit the data to the receiving end, and the retransmission will still be performed in units of TB. [0003] When the size of the transmission block (TB) exceeds the specified threshold, the sender usually needs to perform code block (CB) segmentation. The TB is divided into multiple CBs, and each CB ...

Claims

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Application Information

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IPC IPC(8): H04L1/16
CPCH04L1/0026H04L1/0057H04L1/0081H04L1/1607H04L1/1621H04L1/1692H04W72/541H04L1/1816H04L5/0055H04L5/0064H04W28/04
Inventor 许进徐俊戴博
Owner ZTE CORP
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