Communication method based on full-duplex mac protocol in wireless network

Abstract

The invention discloses a communication method based on a full duplex MAC protocol in a wireless network. The method comprises the following steps: 1, carrying out pretreatment; the initiating node sends a first data frame to the first receiving node, when the first receiving node needs to send the second data frame to the initiating node; immediately sending a second data frame to the initiatingnode according to the source address of the first data frame, and if the end time of the second data frame is earlier than the end time of the first data frame, the first receiving node continuously sending a busy tone signal after sending the second data frame until receiving the first data frame; If the end time of the first data frame is earlier than the end time of the second data frame, the initiating node continues to send a busy tone signal after sending the first data frame until receiving the second data frame; And then sending a confirmation frame to the opposite side. Therefore, therandom access full-duplex MAC protocol is realized, so that the spatial multiplexing rate and the spectrum utilization rate of the channel are improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a communication method based on IEEE 802.11 random access full-duplex MAC (Media Access Control, Media Access Control) protocol in a wireless network. Background technique [0002] Currently used wireless communication systems generally adopt a half-duplex communication method, that is, two-way communication is realized between wireless devices through different frequency bands or different time slots, and signals cannot be sent and received simultaneously in the same frequency band. Full-duplex wireless communication is an emerging communication technology in recent years, that is, full-duplex nodes can simultaneously send and receive wireless signals in the same frequency band, but the biggest obstacle to achieving simultaneous same-frequency full-duplex is that the receiving end will suffer from its own transmission Signal interference (referred to as se...

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Problems solved by technology

[0004] However, the existing full-duplex MAC protocols are all implemented based on the RTS / CTS (RequestToSend / ClearToSend, request to send / clear to send) handshake mechanism, although most of them are compatible with half-duplex transmission, but these protocols require data The frame structure is modified, and it does not support the random access mode in the current wireless network. It is necessary to frequently transmit the control frame for handshake, which will cause a certain waste of spectrum and reduce the throughput of the network.

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