Method for sending and processing wireless aggregation frame and device for sending wireless aggregation frame

Abstract

The invention discloses a method for sending and processing a wireless aggregation frame. The method comprises the steps of: performing protocol treatment on all the current MSDU (medium service data unit) frames to be sent in a sending device by a protocol sending and processing unit in sequence; then performing judgment on all the processed MSDU frames to be sent, performing different operations according to different judgment results, if judging that a plurality of the current MSDU frames to be sent are existent, separating out a plurality of MSDU sub-chains according to the number of MSDU frames includable in a standard aggregation frame, and adding one MPDU frame for loading the aggregation frame into the head of each sub-chain, then respectively storing the sub-chains into current available idle buffer regions; copying a plurality of MSDU frames in the MSDU sub-chains in the current buffer regions into the MPDU frames at the heads of the sub-chains by establishing and starting DMA (direct memory access) transmission businesses; and after receiving an aggregation completion message, transmitting the MPDU frames after aggregation in cache regions to an MAC (medium access control) sending unit by the protocol sending and processing unit in sequence for sending. According to the method, when MAC hardware does not support aggregation, the aggregation of a plurality of MSDU frames is copied by a hardware DMA controller, so that the efficiency of sending and processing the MPDU frames is improved, and the sequence of sending data frames is guaranteed.

Description

technical field [0001] The invention relates to the field of wireless local area network communication, in particular to a method for sending and processing wireless aggregation frames and a corresponding device. Background technique [0002] In order to increase the transmission rate of a wireless local area network (WLAN), the IEEE802.11 working group established the 802.11n task group to devote itself to this. The 802.11n standard adopts many measures in both the physical layer and the MAC layer. The 802.11n standard introduces a technology combining Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO) in the physical layer. , referred to as PHY) standard. In the basic MAC layer protocol of 802.11n, a series of control mechanisms are used in order to ensure that each station can obtain medium use opportunities fairly and avoid conflicts as much as possible; these mechanisms bring fixed overhead while improving system performance, a...

AI Technical Summary

Problems solved by technology

Obviously, if these copy operations are done by software, then the overhead is quite large, which offsets the transmission efficiency that A-MSDU hopes to bring, and at the same time, most of the current MAC hardware does not support the aggregation of MSDU frames

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