An Uplink Cooperative MAC Method for Optimizing System Energy Efficiency

Abstract

The invention provides an uplink cooperative MAC (media access control) protocol for optimizing energy efficiency of a system. An energy consumption model of the system is established through an information source and the number of candidate cooperative station points, the responsive probabilities of cooperation requests of all the candidate cooperative station points are configured by utilizing an optimization theory, and the energy efficiency of an uplink of a traditional single-relay cooperation system is improved. The protocol performs channel access by adopting a competition-based multi-address way and realizes the establishment of cooperative transmission by using request-to-send (RTS) of the information source, clear-to-send (HTS) of the cooperative station points and the clear-to-send (CTS) of an information sink to perform handshaking. The invention provides a compound type cooperative station point selection method, i.e. on the basis of selection of the cooperative station points by the information source, the cooperative station points can judge whether to participate in cooperation or not according to the responsive probabilities of the cooperation requests, and the energy efficiency of the system can be optimized by relieving the energy consumption of the cooperative station points in a traditional cooperation mode. The protocol provided by the invention has great practical values in a quasi-static indoor environment, in particular to applications in energy-limited scenes.

Description

technical field [0001] The present invention relates to the cooperation probability configuration of each site that supports cooperation in the uplink in the cooperative communication, and adopts a composite cooperative site selection method to alleviate the problem of low energy efficiency of the system caused by excessive energy consumption of the cooperative sites, and provides An uplink cooperative MAC scheme for system energy efficiency optimization. Background technique [0002] Cooperative communication technology (cooperative technology) is a key technology of next-generation mobile communication. By using the antennas of idle terminals in the system to construct a virtual multiple-input multiple-output system, the space diversity gain can be realized, and then the system can be improved without adding additional system hardware conditions. System throughput, reduce packet delay. [0003] The IEEE 802.11 series standards are currently widely accepted in the industry...

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Problems solved by technology

[0009] The purpose of the present invention is to provide a new composite cooperative station selection method to balance the source terminal and the cooperative station in order to solve the problem of system energy efficiency reduction caused by the excessive energy consumption of the cooperative station support terminal due to cooperative transmission in the cooperative MAC. The energy consumption speed between the time, improve the energy efficiency of the system

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