Block acknowledgement system and block acknowledgement method based on A-MPDU sub-frame position information control

A technology of information control and subframe location, applied in the field of block acknowledgment systems, can solve the problems affecting the transmission efficiency of A-MPDU transmission, reduce the wireless network throughput rate, restrictions, etc., achieve stable aggregation length, improve throughput rate, and increase transmission The effect of efficiency

Active Publication Date: 2016-04-06
XIDIAN UNIV
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Problems solved by technology

This problem seriously affects the transmission efficiency of A-MPDU tra

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  • Block acknowledgement system and block acknowledgement method based on A-MPDU sub-frame position information control
  • Block acknowledgement system and block acknowledgement method based on A-MPDU sub-frame position information control
  • Block acknowledgement system and block acknowledgement method based on A-MPDU sub-frame position information control

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[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] refer to figure 1 , the technical principle of the present invention is as follows:

[0048] During A-MPDU aggregation frame transmission, since the frame numbers of all aggregated subframes are not necessarily continuous, when multiple subframes are lost, the receiving end will have no way to determine the exact number of currently lost subframes and the number of each lost subframe. The frame number of the subframe, so the receiver can only use the implicit frame number to control the subframe number in [S f , S f +63] for subframes in the range.

[0049] In the block confirmation method based on A-MPDU subframe position information control in the present invention, the sending end uses the bits reserved in the MAC layer frame header of the A-MPDU aggre...

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Abstract

The invention discloses a block acknowledgement system and a block acknowledgement method based on A-MPDU sub-frame position information control, and mainly aims to solve the problem that the number of A-MPDU aggregated sub-frames is decreased mandatorily and fluctuates remarkably due to the influence of lost sub-frames in an IEEE802.11n/ac/ad wireless network. The method comprises the following steps: a sender puts the position information of an aggregated sub-frame in A-MPDU in an MAC layer frame header during A-MPDU frame aggregation; after receiving the aggregated frame, a receiver fills the bit in a corresponding position in a Bitmap acknowledgement table with '1' according to the position information of the received sub-frame; and the receiver assembles the filled Bitmap in BlockACK and feeds the Bitmap back to the sender to complete acknowledgement of the aggregated frame. According to the invention, the number of A-MPDU aggregated sub-frames is no longer subject to the influence of lost sub-frames, the length of aggregated frames is stabilized, and the transmission efficiency is improved. The block acknowledgement system and the block acknowledgement method can be used in a high-speed wireless network.

Description

technical field [0001] The invention belongs to the field of wireless communication networks, and in particular relates to a block confirmation system and method, which are used in IEEE802.11n / ac / ad wireless networks to improve A-MPDU transmission efficiency and network throughput. Background technique [0002] At present, the main technology adopted by the wireless local area network WLAN is the IEEE802.11 series standard protocol. However, as the transmission rate of the physical layer of the wireless network increases greatly, the throughput rate of the MAC layer of the medium access control layer is more and more seriously affected by the overhead of the transmission protocol. In order to solve the problem of limited MAC throughput caused by overhead in high-speed data transmission, IEEE802.11n defines two frame aggregation methods: MAC layer service data unit aggregation A-MSDU and MAC layer protocol data unit aggregation A-MPDU. Among them, the A-MPDU aggregation mech...

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Application Information

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IPC IPC(8): H04L1/00H04L1/16H04L1/18H04L12/855H04L47/2466
CPCH04L1/0007H04L1/0008H04L1/0083H04L1/1664H04L1/1858H04L47/2466H04L1/1614H04L1/08H04L1/1607H04L1/1861H04L1/20
Inventor 姚明旿刘吉龙邱智亮
Owner XIDIAN UNIV
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