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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 coordinated multiple access access methods and systems, to achieve the effects of ensuring successful transmission, reducing the probability of conflicts, and improving network throughput

Inactive Publication Date: 2012-09-12
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008]In addition, the cooperation method using two or more channels in the existing technology requires other additional technical support, such as directional antennas, etc., which greatly increases the application complexity and cost

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

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[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 CRTS packets on the control channel;

[0050] Step 2, when the destination node receiving the CRTS packet judges that the data channel is available, it sends a CCTS packet on the control channel;

[0051] Step 3. After the adjacent node detects the CRTS group and CCTS group on the control channel and judges that the data channel is available and satisfies the cooperation condition, it sends an HA group on the control channel and sends an RTH group as a cooperative node;

[0052] Step 4, after the source node and the destination node receive the RTH grouping on the control channel, they send the SCA grouping and the DCA grouping respectively on the control channel, and the source node sends the destination node to the destinat...

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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 coordinated 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 share channel resources quickly, efficiently, fairly and reliably. In wireless communication, multipath fading is an important factor affecting communication quality. Diversity technology is widely used in traditional wireless communication to reduce the impact of multipath fading. The so-called diversity means that in order to ensure the quality of transmission, the sending end adopts a certain 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 there is a signal of one path that is strong enough to ensure reliable communicatio...

Claims

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Application Information

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