Cooperative channel access method and cooperative communication system capable of guaranteeing quality of service

A channel access method and a quality of service technology, applied in the field of wireless communication, can solve the problems of increased transmission time, low transmission data rate, unfavorable real-time service QoS requirements, etc., to ensure QoS requirements and meet the needs of real-time services. Effect

CN102170665AInactive Publication Date: 2011-08-31BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-08-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a cooperative channel access method and a cooperative communication system capable of guaranteeing quality of service, wherein the method is characterized in that a plurality of transmitter nodes compete for the access to a channel according to the priorities of respective to-be-transmitted service packets and a winning transmitter node with the highest priority obtains access to the channel; the winning transmitter node sends a CRTS packet to the channel; a receiver node receives the CRTS packet on the channel and replies with a CCTS packet; a plurality of cooperative nodes compete for the access to the channel according to the CRTS packet and the CCTS packet and a winning cooperative node with the highest priority obtains the access to the channel; and the winningtransmitter node transmits the service packet to the receiver node through the transmission of the winning cooperative node. The method and system can better guarantee the quality of service under high speed information transmission, thereby meeting the requirement of service real time for users.
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Description

technical field

[0001] The invention relates to a cooperative channel access method and a cooperative communication system for guaranteeing service quality, and belongs to the technical field of wireless communication. Background technique

[0002] In wireless communication, factors such as channel fading and channel quality deterioration will lead to a decrease in communication quality and a reduction in communication range. In this case, in order to ensure the communication between nodes, the method of increasing the transmission power of nodes is usually adopted, but the increase of transmission power will not only bring unnecessary interference, but also consume a lot of energy. Another solution is to use a node relay method, that is, one or more nodes perform one or more relays between nodes, so as to realize multi-hop communication. At present, a Multiple-Input Multiple-Output (MIMO for short) system can provide greater diversity gain, greatly improve communication qu...

Examples

Embodiment Construction

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] figure 1 It is a flow chart of Embodiment 1 of the cooperative channel access method for ensuring service quality described in the present invention. As shown in the figure, the method includes the following steps:

[0041] Step 110, multiple sender nodes compete to access the channel according to the priorities of their service packets to...