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Code merging buffer allocation method and device

A buffer allocation and buffering technology, applied in the field of communication, can solve the problems of reducing the actual gain of HARQ characteristics, predicting the combination of retransmissions, and not guaranteeing the HARQ process.

Inactive Publication Date: 2014-11-19
CHINA ACAD OF TELECOMM TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

In this case, there is no guarantee that each downlink HARQ process can be allocated a code combining buffer under any circumstances.
[0007] The inventors of the present invention found that at present, only the downlink control signaling carried by the control channel PDCCH is used for scheduling, but the physical layer needs to determine for which process the code combination result in the code combination space is reserved first, and the downlink control signaling carried by the PDCCH Scheduling the PDSCH channel later is not conducive to the physical layer predicting the process number that needs to be retransmitted and combined in advance, and it is not conducive to the physical layer to determine in real time which process the code combination result needs to be kept in the code combination BUFFER. When the maximum number of downlink HARQ processes is greater than 8 will cause data conflicts in different processes, reducing the actual gain of the HARQ feature

Method used

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  • Code merging buffer allocation method and device
  • Code merging buffer allocation method and device

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Embodiment Construction

[0019] Embodiments of the present invention provide a method and device for allocating a code combining buffer. When it is determined that the currently transmitted data is newly transmitted data and the decoding is incorrect, the HARQ reserved code combining buffer is requested for the HARQ corresponding to the data. And the de-rate matching result before this decoding is pre-stored in the code combining buffer, which realizes the reasonable use of the code combining buffer and improves the actual gain of the HARQ feature.

[0020] Such as figure 1 As shown, the code merging buffer allocation method provided by the embodiment of the present invention includes:

[0021] Step S101. Determine whether the currently transmitted data is newly transmitted data according to the new data indication information;

[0022] Step S102, when it is determined that the currently transmitted data is newly transmitted data and the decoding is incorrect, reserve the code merging buffer for the ...

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Abstract

The invention discloses a code merging buffer allocation method and device, and relates to communication technology. When currently transmitted data are determined to be newly transmitted data and decoding is incorrect, a code merging buffer is reserved for an HARQ corresponding to the data, and a rate de-matching result before decoding of this time is prestored in the code merging buffer, thereby realizing reasonable use of the code merging buffer, and improving the actual gain of HARQ characteristics.

Description

technical field [0001] The present invention relates to communication technology, in particular to a method and device for code merging and buffer allocation. Background technique [0002] Currently, the LTE TDD (Long Term Evolution Time Division Duplex) protocol uses adaptive asynchronous HARQ (Hybrid Automatic Repeat Request) for downlink. In the LTE protocol, HARQ technology is a very important feature. Downlink HARQ adopts the "Stop-and-Wait" (Stop-and-Wait) HARQ implementation method of multiple processes, that is, for a certain HARQ process, wait until the receiving end feedbacks Before the ACK / NACK (correctly decoded positive / negative acknowledgment) is fed back, the process is temporarily terminated. After the sender receives the ACK / NACK, it decides to send new data or retransmit old data according to whether it is ACK or NACK. At the receiving end, the received data is code-combined and then decoded, and it is determined whether to feed back ACK or NACK to the sen...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04W28/04
Inventor 苗玉梅孙军帅
Owner CHINA ACAD OF TELECOMM TECH
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