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Adapter distribution multi-address access method

An access method and distributed technology, applied in the field of communication, to achieve the effects of eliminating packet collision, high channel utilization, and good collision avoidance

Inactive Publication Date: 2009-11-11
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The present invention provides an adaptive distributed multiple access method for multi-channel reserved access to effectively solve the problems of hidden terminals and exposed terminals in a multi-hop network environment, as well as the problem of intruding terminals caused by node movement. for better multi-access performance

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  • Adapter distribution multi-address access method

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Embodiment Construction

[0025] In order to solve the problem of hidden terminals and exposed terminals in a multi-hop network environment, as well as the problem of intruding terminals caused by the movement of nodes, and further reduce the transmission collision time between the sender and hidden terminals, the present invention provides a multi-channel reservation The adaptive distributed multiple access method in which access and service transmission are separated on channels includes: monitoring a common channel; specifying a communication channel; confirming a specified channel; transmitting service packets; Assumptions:

[0026] t PKT The sending time of the business packet;

[0027] t TR is the sending time of TR packet;

[0028] t RR is the sending time of the RR packet;

[0029] t ACK is the sending time of the ACK packet;

[0030] t p is the signal propagation delay;

[0031] t p-maxis the longest signal propagation delay between any two nodes in the network;

[0032] t rt is th...

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Abstract

This invention relates to an adaptive distributed multi-address accessing method including: monitoring a public channel, the transmitting party selects an idle service channel and transmits transmission required packet to the receiving party on the public channel to point out the channel to the receiving party after one or more than one signal transmission idle periods, after confirming that the channel is available, the receiving party transmits a response packet request to the transmitting party, if it receives the request correctly, it sends the service packet to the receiving party on an appointed channel, which solves a problem of hidden terminals or exposed terminals under multi-hop network environment.

Description

technical field [0001] The invention relates to a multiple access method, in particular to an adaptive distributed multiple access method, and belongs to the technical field of communication. Background technique [0002] The multiple access (or media access control) method solves the problem of how multiple nodes or users share channel resources quickly, efficiently, fairly and reliably. The quality of the multiple access method directly affects the usage efficiency of extremely limited wireless resources. According to the way of channel allocation, it is usually divided into three ways: fixed allocation, random access and on-demand allocation. [0003] The fixed-allocation multiple access method generally allocates channel resources to some nodes or all nodes that share the channel for a long time. Since there are a large number of mobile nodes in various mobile communication networks, and the business of each node is mostly bursty business, the multiple access method of...

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Application Information

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IPC IPC(8): H04W72/04H04L12/56H04B7/26H04W74/08H04W76/02
Inventor 刘凯张军张彦
Owner BEIHANG UNIV
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