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WLAN system aggregation retransmission method and WLAN system aggregation retransmission system

A technology for retransmitting and aggregating frames. It is used in transmission systems, digital transmission systems, and error prevention/detection using return channels. It can solve problems such as reduced throughput, packet loss in frame aggregation transmission, and massive packet loss.

Active Publication Date: 2019-12-03
浙江科睿微电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In an environment with poor channel quality, packet loss will occur in frame aggregation transmission, resulting in a decrease in throughput. Therefore, the sender needs to retransmit
The existing retransmission algorithm confirms the position of the lost aggregated subframe according to the "BlockACK" frame replied by the receiving end, and aggregates the lost aggregated subframe again for aggregated retransmission. However, when the channel quality continues to be poor, the aggregated retransmission There will still be a lot of packet loss, which will reduce the system throughput

Method used

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  • WLAN system aggregation retransmission method and WLAN system aggregation retransmission system
  • WLAN system aggregation retransmission method and WLAN system aggregation retransmission system
  • WLAN system aggregation retransmission method and WLAN system aggregation retransmission system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This implementation provides a WLAN system aggregation retransmission method, see figure 1 , the method includes:

[0047] S101. Confirm the lost subframes and the lost number n of the aggregation transmission of the WLAN system;

[0048] S102. Determine whether the number n of losses is greater than a preset threshold N; where 0max / 2,N max is the maximum number of aggregated subframes allowed in an aggregated frame;

[0049] S103. If not, copy the lost number n M times to obtain M×n copied subframes; where n+M×n≤N max ;

[0050] S104. Perform aggregated retransmission of the M×n copied subframes and the lost subframe together.

[0051] Refer below figure 1 , to explain each step in this implementation in detail.

[0052] Firstly, step S101 is executed to confirm the lost subframes and the lost number n of aggregated transmission of the WLAN system.

[0053] In the specific implementation process, in order to obtain the lost aggregated subframe and the number n ...

Embodiment approach

[0067] Of course, in the specific implementation process, the preset condition may not be satisfied, wherein, when n is less than 0, it means that no aggregation subframe loss occurs, and the method of this embodiment does not need to be executed again. When the number n of lost aggregated subframes is greater than N max / 2, as an optional implementation manner, the method further includes:

[0068] If the number of losses n is greater than N max / 2, aggregate and retransmit the lost subframes.

[0069] Therefore, if copying is performed at this time, the number of aggregated subframes after copying will exceed N max , no longer meet the requirements of the WLAN system protocol, therefore, the aggregation retransmission is directly performed.

[0070] However, as an optional implementation manner, if the number n of the lost aggregated subframes is greater than N max , the lost aggregated subframes can be partially replicated, so that after replication, the total number of...

Embodiment 2

[0078] Based on the same inventive concept as that of Embodiment 1, this embodiment provides a WLAN system aggregation retransmission system, see image 3 , the system includes:

[0079] A first acquiring module, configured to confirm the lost subframes and the lost number n of the WLAN system aggregation transmission;

[0080] A first judging module, configured to judge whether the number n of losses is greater than a preset threshold N; where 0max / 2,N max is the maximum number of aggregated subframes allowed in an aggregated frame;

[0081] A subframe copying module, for if not, copying the lost quantity n M times to obtain M×n copied subframes; wherein, n+M×n≤N max ;

[0082] The first retransmission module is configured to aggregate and retransmit the M×n copied subframes and the lost subframes together.

[0083] As an optional implementation manner, the system also includes:

[0084] The second acquiring module is configured to acquire the maximum number N of aggreg...

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Abstract

The invention discloses a WLAN (Wireless Local Area Network) system aggregation retransmission method. The method comprises the following steps: confirming lost sub-frames and a lost number n of aggregation transmission of the WLAN system; judging whether the loss number n is greater than a preset threshold N or not; wherein N is greater than 0 and less than Nmax / 2, and Nmax is the maximum numberof aggregation subframes allowed to be contained in one aggregation frame; if not, copying the lost number n for M times to obtain M*n copied subframes; wherein n+M*n is less than or equal to Nmax; and aggregating and retransmitting the M*n copied sub-frames and the lost sub-frames together. The success rate of retransmission can be improved, so that the throughput efficiency of a WLAN system is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless local area networks, in particular to a method and system for aggregation and retransmission of a WLAN system. Background technique [0002] With the formulation and promotion of IEEE 802.11n / ac / ad / ay / ax / be wireless LAN standards, the transmission rate of the physical layer has been greatly improved. However, the fixed overhead of the Media Access Control layer (Media Access Control, MAC) and the physical layer frame header reduces the effective utilization of the channel. In order to reduce the protocol overhead and improve the efficiency of the MAC layer, the IEEE 802.11n / ac / ad / ay / ax / be protocol proposes a MAC layer frame aggregation algorithm, which can reduce the physical layer by aggregating multiple MAC subframes. The impact of the preamble on the throughput, thereby improving the channel utilization. [0003] In an environment with poor channel quality, packet loss will occur in ...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/18H04W84/12
CPCH04L1/1607H04L1/1809H04W84/12
Inventor 不公告发明人
Owner 浙江科睿微电子技术有限公司
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