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Point-to-multipoint in-band full duplex wireless communication media access control method

A media access control and wireless communication technology, applied in wireless communication, duplex signal operation, connection management, etc., can solve the problems of not being able to make full use of full-duplex communication and access, and achieve improved network throughput and high network efficiency. Performance, the effect of reducing network delay

Inactive Publication Date: 2016-04-06
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the in-band full-duplex wireless communication three-node asynchronous bidirectional link, the RTS / CTS access mechanism cannot establish a communication link between the three nodes through one media access, so the RTS / CTS access mechanism is directly applied In-band full-duplex wireless communication cannot make full use of the characteristics of full-duplex communication

Method used

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  • Point-to-multipoint in-band full duplex wireless communication media access control method
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  • Point-to-multipoint in-band full duplex wireless communication media access control method

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Embodiment 1

[0077] Embodiment 1: In a point-to-multipoint in-band full-duplex wireless communication network, there are n+1 nodes, that is, one wireless access point (AP) and n stations.

[0078] Such as figure 1 As shown, when station 1 has a data packet (data packet 1) to send to the AP, station 1 first sends an RTS frame to the AP after completing the backoff process. After the AP receives the RTS frame, it reads that the destination address is itself. When AP has no data packet to send to station 1, AP will send a CTS frame to station 1 after the SIFS time slot, which is the same as in half-duplex wireless communication. When the AP also has a data packet (data packet 2) to send to station 1, after the SIFS time slot, the AP sends a RRTS frame to station 1. According to the received RRTS frame, station 1 knows that the AP has successfully received the RTS frame and requests Send a data packet to station 1 while station 1 sends a data packet, wait for a SIFS time slot, station 1 send...

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Abstract

A point-to-multipoint in-band full duplex wireless communication media access control method belongs to the wireless communication media access control method field, comprising: building connection between a wireless access point (AP) in a communication node and a station by two request frames RTS (Request-to-Send) and RRTS and one response frame CTS (Clear-to-Send), wherein the RRTS frame comprises data package 1 and data package 2 source addresses, a destination address and a data frame length; sending and receiving data packages at the same frequency at the same time by the AP and the station through the built communication link, wherein the transmission type comprises: 1) synchronous two-way link communication taking the station as the source node; 2) synchronous two-way link communication taking the AP as the source node; 3) asynchronous two-way link communication taking the station as the source node; 4) asynchronous two-way link communication taking the AP as the forwarding node. The method provided in the invention is advantaged by that the communication link is built by using amedia access control method once, two different nodes send respective data packages at the same time, the network throughput is remarkably improved, the network delay is reduced, and the method is compatible with the half-duplex wireless communication mode based on RTS / CTS mechanism.

Description

technical field [0001] The invention relates to a medium access control method for wireless communication, in particular to a medium access control method for point-to-multipoint in-band full-duplex wireless communication. Background technique [0002] In-band full-duplex wireless communication supports nodes to simultaneously receive and send data on the same frequency band, and can obtain double throughput compared with time-division duplex and frequency-division duplex. However, there are serious self-interference and intra-node interference problems in in-band full-duplex wireless communication, which greatly affect the reception and decoding of useful signals. Therefore, the realization of in-band full-duplex wireless communication first needs to effectively eliminate self-interference signals and inter-node interference signals. [0003] In recent years, a large number of advanced self-interference cancellation methods such as antenna cancellation, digital cancellatio...

Claims

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Application Information

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IPC IPC(8): H04L5/14H04W76/02
CPCH04L5/1438H04W76/10
Inventor 孙彦景左海维渠倩倩梁迪慧周公博徐永刚蒋宇娜
Owner CHINA UNIV OF MINING & TECH