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A hybrid automatic repeat request method, device and system

A hybrid automatic retransmission and retransmission technology, applied in the field of communication, can solve problems such as multi-user data collisions

Active Publication Date: 2019-09-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a hybrid automatic repeat request method, device and system to solve the problem of multi-user data collision in the shared channel of HARQ in the prior art

Method used

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  • A hybrid automatic repeat request method, device and system
  • A hybrid automatic repeat request method, device and system
  • A hybrid automatic repeat request method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0231] figure 1 For a schematic flowchart of the hybrid automatic repeat request method provided in Embodiment 1 of the present invention, refer to figure 1 , which may specifically include the following steps:

[0232] Step 10, the sending end sends a hybrid automatic repeat request HARQ capability negotiation request message to the receiving end.

[0233] Wherein, in step 10, the MAC layer of the sending end learns that a new service flow needs to be sent to a certain receiving end, and creates a new traffic identification (Traffic Identification, TID for short). The MAC layer of the sending end sends a HARQ capability negotiation request message to the receiving end. The content of the message includes but is not limited to the following:

[0234] (1) Whether the receiving end supports HARQ;

[0235] (2) Whether the receiver supports Orthogonal Frequency Division Multiple Access (OFDMA);

[0236] (3) Message length threshold;

[0237] (4) Whether the receiving end supp...

Embodiment 2

[0255] This embodiment is an optimization solution when the receiving end only supports CSMA / CA and the receiving end supports special codewords on the basis of the above implementation. refer to image 3 as shown, image 3 A schematic flowchart of a hybrid automatic repeat request method is provided for Embodiment 2 of the present invention (where image 3 Only the keywords in the steps are shown in , and the specific description refers to the embodiment), which may specifically include the following steps:

[0256] Step 301, the sending end sends a hybrid automatic repeat request HARQ capability negotiation request message to the receiving end.

[0257] Wherein, in step 301, the MAC layer of the sending end learns that a new traffic flow needs to be sent to a certain receiving end, and creates a new traffic identification (Traffic Identification, TID for short). The MAC layer of the sending end sends a HARQ capability negotiation request message to the receiving end. The ...

Embodiment 3

[0316] This embodiment is an optimization solution when the receiving end only supports OFDMA and supports special codewords on the basis of the first implementation above. Image 6 It is a schematic flowchart of the hybrid automatic repeat request method provided by Embodiment 3 of the present invention. in Image 6 Only the key words in the steps are shown in , and the specific description refers to the embodiment.

[0317] refer to Image 6 , which may specifically include the following steps:

[0318] Step 401, the sending end sends a hybrid automatic repeat request HARQ capability negotiation request message to the receiving end.

[0319] Wherein, in step 401, when the MAC layer of the sending end learns that a new service flow needs to be sent to a certain receiving end, a new flow identifier TID is created. The MAC layer of the sending end sends a HARQ capability negotiation request message to the receiving end. The content of the message includes but is not limited...

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Abstract

Disclosed are a hybrid automatic repeat request method, apparatus, and system, applied to the field of communications, so as to solve the problem of collision of data of multiple users in hybrid automatic repeat request (HARQ) caused by channel sharing in the prior art. The method comprises: a transmit end sending an HARQ capability negotiation request packet; receiving an HARQ capability negotiation response packet fed back by a receive end, determining, according to the HARQ capability negotiation response packet, whether the receive end supports HARQ, and if the receive end supports HARQ, allocating an HARQ session identifier to the receive end; obtaining a channel use right of sending an HARQ data packet, and sending an HARQ data packet to the receive end through a channel according to the HARQ session identifier; and the transmit end receiving a response packet fed back by the receive end, and according to the response packet, determining that the data packet is successfully sent or determining to perform a retransmission operation according to a preset rule. Embodiments of the present invention are applied to the HARQ technology.

Description

technical field [0001] The present invention relates to the communication field, in particular to a hybrid automatic repeat request method, device and system. Background technique [0002] Hybrid Automatic Repeat Request (HARQ) is a hybrid method combining Forward Error Correction Coding (FEC) and Automatic Repeat Request (ARQ). The codeword sent by the sender can not only check for errors, but also has certain error correction capabilities. A Wireless Fidelity (WiFi for short) communication system adopts an Automatic Repeat Request (ARQ) method. The codeword sent by the sending end has a certain error correction capability. If the receiving end successfully receives the codeword, it will feed back a successful acknowledgment signal (Acknowledgment, ACK) to the sending end; if the receiving end fails to receive the codeword, the receiving end will not give any feedback. If the sending end does not receive a successful acknowledgment signal ACK from the receiving end withi...

Claims

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Application Information

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IPC IPC(8): H04L1/18
Inventor 倪锐罗毅刘亚林
Owner HUAWEI TECH CO LTD
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