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Realization method of 802.11n block transmission mechanism

An implementation method and block transmission technology, applied in the field of wireless local area network, can solve the problems of increasing the driving processing time, reducing the transmission efficiency, and reducing the receiving efficiency, etc.

Active Publication Date: 2013-05-15
BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The data frames sent are all sent to the hardware by the driver. Using the driver to maintain the sending record is the most direct way to achieve it, but the driver maintains the sending record and compares it with the response record of the received block response frame, which will increase the processing time of the driver. reduce sending efficiency
The received data frame is also received by the hardware, and then uploaded to the driver, so it is the most direct way to use the driver to maintain the receiving record and build the block response frame, but the driver's maintenance of the sending record and building the block response frame will also increase the processing time of the driver and reduce the Receiving efficiency

Method used

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  • Realization method of 802.11n block transmission mechanism
  • Realization method of 802.11n block transmission mechanism

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Experimental program
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Embodiment approach

[0017] When a sequence of data frames is sent in a block transmission mode, a sequence of frames first sends a start signal. T_bitmap is reset to all 0s when a frame sequence is triggered by sending the start signal. When the first frame of the sequence starts to be sent, the lowest position of t_bitmap is 1, and t_SSN is assigned to the SN of the sent frame. When the subsequent frame in the sequence starts to be sent, the corresponding bit of t_bitmap is set to 1, and t_TID is assigned to the TID of the sent data frame, and this step is repeated until the entire frame sequence is sent. If the data frame is not sent in block transmission mode, t_TID, t_bitmap and t_SSN are not updated. The logic for updating and storing t_TID, t_bitmap and t_SSN is figure 1 The logic inside the block diagram "t_TID t_bitmap t_SSN". In order to improve the utilization rate of the channel, the BAR frame is not sent after the sequence is sent, and the BA frame is always waited for. After receiv...

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Abstract

The invention provides a high-efficinecy and rapid realization method for supporting a 802.11n block transmission mechanism. 802.11n MAC of a supporting block transmission mechanism maintains a receiving bitmap and a window initial value of the bitmap for a receiving data frame sequence as well as a transmitting bitmap and a window initial value of the bitmap for a transmitting data frame sequence. All the updating processes, the comparison processes and the response processes of the bitmaps and the window initial values are completely realized by using hardware, so the invention realizes simple and rapid process, avoids the drive of maintenance transmitting and receiving record, effectively improves the efficiency and reduces the time cost.

Description

Technical field [0001] The invention relates to the field of wireless local area networks. As an efficient and fast realization method of a block response mechanism, the invention is particularly suitable for the realization of a high-throughput and high-bandwidth wireless local area network card and access point chip using a block transmission mechanism. Background technique [0002] Improving the channel utilization rate under the premise of the same bandwidth is the simplest and cheapest way to improve efficiency. The 802.11 international standard uses a block transmission mechanism to improve channel utilization. The common frame sequence in 802.11 is [data frame, response frame, data frame, response frame...], the response frame only responds to the data frame transmitted before it. The frame sequence using the block transmission mechanism is [data frame 1, data frame 2...data frame n, (block response request frame), block response frame], and the block response frame respo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/04H04W28/06H04W72/04H04W84/12
Inventor 李霞
Owner BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD