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Multi-channel collaboration multi-address access method and system

An access method and access system technology, applied in the field of multi-channel cooperative multiple access access methods and systems, can solve problems such as packet transmission conflicts, achieve the effects of reducing the probability of conflicts, improving network throughput, and ensuring successful transmission

Inactive Publication Date: 2010-06-23
BEIHANG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a multi-channel coordinated multiple access method and system, which can effectively solve technical defects such as large conflicts in the existing single-channel coordinated technology packet transmission

Method used

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  • Multi-channel collaboration multi-address access method and system
  • Multi-channel collaboration multi-address access method and system
  • Multi-channel collaboration multi-address access method and system

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Embodiment Construction

[0047] The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments.

[0048] figure 1 It is a flow chart of the multi-channel coordinated multiple access method of the present invention, including:

[0049] Step 1. According to the stored and maintained channel state table, the source node selects a data channel and sends a CRTS packet on the control channel;

[0050] Step 2. When the destination node receiving the CRTS packet judges that the data channel is available, the CCTS packet is sent on the control channel;

[0051] Step 3, when the neighbor node detects the CRTS grouping and the CCTS grouping on the control channel and judges that the data channel is available and satisfies the cooperation condition, it sends the HA grouping on the control channel and sends the RTH grouping as a cooperative node;

[0052] Step 4. After the source node and the destination node receive the RTH packet on ...

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Abstract

The invention relates to a multi-channel collaboration multi-address access method and a system. The method comprises the following steps: a source node selects a data channel from a channel state table and sends a CRTS packet on a control channel; when a target node which receives the CRTS packet judges that the data channel is available, the target node sends a CCTS packet on the control channel; when a neighbor node judges that the data channel is available and meets the collaboration conditions; the neighbor node sends a HA packet on the control channel and sends an RTH packet as a collaborative node; when the source node and the target node receive the RTH packet on the control channel, the source node and the target node respectively send an SCA packet and a DCA packet on the control channel, and the source node sends the data packet to the target node through the collaborative node on the data channel; and the target node sends a busy tone after receiving the data packet. On the one hand, the invention can solve the technical defects of low transmission reliability and the like of the existing data transmission due to conflicts, on the other hand, the invention can greatly reduce the application complexity and the cost.

Description

technical field [0001] The present invention relates to a multiple access method and system, in particular to a multi-channel cooperative multiple access method and system. Background technique [0002] The multiple access (ie medium access control, MAC for short) method is used to solve the problem of how multiple nodes or users can share channel resources quickly, efficiently, fairly and reliably. In wireless communication, multipath fading is an important factor affecting communication quality. Diversity techniques are widely used in traditional wireless communications to reduce the effects of multipath fading. The so-called diversity means that in order to ensure the transmission quality, the transmitting end adopts the method to transmit multiple copies of the same signal through mutually independent fading channels. Since the fading of each path is independent of each other, as long as the signal of one path is strong enough, reliable communication can be guaranteed. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04L1/16
Inventor 张军刘凯刘云徐桢
Owner BEIHANG UNIV
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