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TRS (Request-To-Send)/CTS (Clear-To-Send) communication control method

A technology for communication control and control signaling, applied in wireless communication, electrical components, network topology, etc., can solve the problems of not improving channel utilization, process complexity, etc., to improve channel utilization, improve utilization, and reduce protocols. Effects of parameters

Inactive Publication Date: 2017-01-18
韦彩勇
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AI Technical Summary

Problems solved by technology

Although this method ensures that data packets do not collide, and can solve the problem of hidden terminals and exposed terminals, it does not improve channel utilization, and the introduction of new control packet communication complicates the process.

Method used

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  • TRS (Request-To-Send)/CTS (Clear-To-Send) communication control method
  • TRS (Request-To-Send)/CTS (Clear-To-Send) communication control method
  • TRS (Request-To-Send)/CTS (Clear-To-Send) communication control method

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Embodiment Construction

[0059] The present invention will be further described below in combination with specific examples of typical scenarios. This embodiment only shows the principle description of the present invention, and does not represent any limitation to the present invention.

[0060] In this embodiment, all channel resources are 5MHz continuous wireless spectrum, which are divided into: "data channel" 4.5kHz, RTS channel 0.25kHz, CTS channel 0.25kHz according to frequency division. The parameter n is 0.9.

[0061] The channel time slot length is T1=1250 μs, the guard interval T2=0, the backoff time T3 is a random number, and the waiting time T4=10*T1.

[0062] The address code length is K=4, which can support 16 dynamic nodes.

[0063] Spreading factors are SF1=16, SF2=16. The spreading code adopts the Gold sequence.

[0064] All nodes are in a synchronized state, including: spreading code synchronization, chip synchronization, frame synchronization, and carrier synchronization necess...

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Abstract

The invention provides a TRS (Request-To-Send) / CTS (Clear-To-Send) communication control method. In the method, a channel is divided into three sub-channels which are a data channel, an RTS control channel and a CTS control channel; control packets are continuously transmitted on the control channels in a spread spectrum form; a source node detects the control channels before the transmission of an RTS, and transmits RTS request signaling if a destination node is idle and does not have other CTS information; and the destination node transmits a multi-state CTS response through detecting the RTS control channel, and the source node makes a corresponding response. According to the method, a hidden terminal problem and an exposed terminal problem can be completely solved, and the utilization rate of the sub-channels can be improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication networks, and in particular relates to an RTS / CTS handshake mechanism (the full name of RTS is Request-To-Send, and the full name of CTS is Clear-To-Send), and a solution to the problem of WLAN hidden terminals and exposed terminals. Background technique [0002] The communication range of each node in WLAN is limited, and the broadcast channel is shared, which leads to the emergence of "hidden terminal" and "exposed terminal". [0003] "Hidden terminal" refers to a terminal located within the communication range of the receiver but out of the communication range of the sender. The hidden terminal may send packets to the same receiving node because it cannot listen to the transmission of the sending node, resulting in packet collision at the receiving node. If the terminal sends information at this time, it is "hidden sender", see figure 1 , node C is the hidden sender. Hiding th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W84/12H04W74/00
CPCH04W74/0816H04W74/002H04W84/12
Inventor 韦彩勇
Owner 韦彩勇
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