WLAN date retransmission method, equipment and system

Abstract

The invention discloses a WLAN (Wireless Local Area Network) date retransmission method. The method comprises the following steps: after sending out wireless frames, a sender judges whether PIFS (Point coordination function Interframe Space) retransmission is needed according to the indication information, used for indicating the frame acknowledgment mode for a receiver, of the wireless frames and the detection result of an information channel through which the wireless frames are sent out; and performing PIFS retransmission after determining that PIFS retransmission is needed. The invention further discloses WLAN date retransmission equipment and a WLAN date retransmission system. Through the adoption of the method, the equipment and the system provided by the invention, the probability of collision in date retransmission in quick frame exchange is effectively reduced, and further the utilization ratio of the information channel is improved.

Description

technical field [0001] The present invention relates to wireless local area network (WLAN, Wireless Local Area Networks) technology, in particular to a method, device and system for data retransmission in WLAN. Background technique [0002] At present, in the wireless network field, WLAN is developing rapidly, and the application demand for WLAN is increasing day by day. For WLAN technology, the Institute of Electrical and Electronics Engineers industry standard IEEE802.11 group has defined a series of standards such as 802.11a, 802.11b, and 802.11g. Improved specification. Among them, the 802.11ah task group mainly formulates WLAN network air interface standards using license-free frequency bands below 1 GHz to support new network applications such as smart grids and sensor networks. [0003] The basic architecture of WLAN refers to a basic service set (BSS, Basic Service Set), and a BSS includes: an access point (AP, Access Point) and multiple stations (STA, Station) ass...

AI Technical Summary

Problems solved by technology

Since the STA detects that the channel is busy after sending the SIFS of the data frame, it does not parse the data frame sent by the AP. Therefore, when it detects that the channel is idle in the PIFS, it will retransmit the data frame to the AP at the PIFS boundary; When the AP sends a data frame to the STA, it detects that the channel is idle in the PIFS, and it will also initiate a retransmission to the STA at the PIFS boundary. In this way, the data sent by the STA and the AP will collide, and the number of frame exchanges will increase. And channel access times, that is to say, it will affect the original intention of reducing frame exchange and channel access times in Speed ​​frame exchange, which will cause a decrease in channel utilization

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