A method and device for transmitting an indication message to be received

Abstract

A method for transmitting an indication message to be received, comprising: an access point sending a broadcast message, the broadcast message comprising: indication bitmap information to be transmitted, information about a first station group waiting to receive and send time information about a first trigger message, wherein the first station group waiting to receive corresponds to the first trigger message; the first trigger message is used for instructing stations waiting to receive which support a multi-user transmission mechanism in the first station group waiting to receive to simultaneously send the indication message to be received to the access point; and the stations waiting to receive are stations indicating that there is downlink data in the TIM; the access point sending the first trigger message according to the sending time information about the first trigger message; and the access point receiving the indication message to be received sent by at least one station of the first station group waiting to receive according to the first trigger message and using the multi-user transmission mechanism.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for transmitting an indication message to be received. Background technique [0002] In a wireless local area network, in order to save power, the station usually works in the power saving mode. When the station works in the power saving mode, its working state alternates between the Awake state and the Doze state according to certain rules. When in the Doze state, the power consumption of the station can be reduced to a very low level, but the messages sent by the access point cannot be received. [0003] In order to enable the access point to send the arriving data to the station as soon as possible, the current Wireless Fidelity (WiFi, WIreless-FIdelity) 802.11 standard defines a data transmission indication map (TIM, Traffic Indication Map) downlink data transmission mechanism. According to the TIM mechanism, stations working in power-saving mode nee...

AI Technical Summary

Problems solved by technology

[0005] Through the above-mentioned channel free competition process, it can be seen that when two stations happen to randomly select the same backoff time value, the PS-Poll messages sent by the two stations at the same time will conflict, and in this case the stations will re-channel compete

Since the channel competition of multiple stations is carried out on the entire access point working channel, obviously, the conflict of PS-Poll messages will inevitably cause the waste of the entire channel resource

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