Orthogonal frequency division multiple access relay system resource allocation method based on game theory

Abstract

The invention discloses a resource allocation method comprehensively considering trunk node selection, subcarrier pairing and power control, which is based on the solution of orthogonal frequency division multiple access relay system resource allocation of a game theory. The trunk nodes divide equivalent channel gain obtained by calculation into quantized intervals, and feed back the serial number of the quantized interval to which the trunk node belongs, thereby ensuring that cooperative node selection can be determined through less bit information interchange. A base station firstly allocates the subcarrier of each trunk node for the second jump, and then the trunk nodes select a user node. Subcarriers of two jumps are matched by using megamerger as the purpose, and the maximum flow and minimum division theory are utilized to determine the transmitted power on corresponding subcarrier when trunk nodes are forwarded. Particularly, a speed utility function based on unit power is established, a price mechanism based on link quality and transmitted power is introduced, and price factors can be adjusted in real time according to different service requirements, thereby realizing the optimized allocation of transmitted power of user nodes on each selected subcarriers.

Description

technical field [0001] The present invention relates to a solution for distributed dynamic resource allocation in an Orthogonal Frequency Division Multiple Access (OFDMA) relay system, specifically a method for uplink OFDMA A dynamic resource allocation method based on non-cooperative game-based relay selection, subcarrier pairing and power allocation in a relay system that takes performance optimization and fairness into account. Background technique [0002] In order to meet the requirements of high transmission rate and high-band time wide coverage of the next-generation broadband mobile communication standard (IMT-Advanced), people regard cooperative communication technology as one of the key technologies of future mobile communication systems, hoping to achieve Obtain synergistic diversity gain, improve data transmission rate, increase system coverage and save terminal power consumption. As one of the important application scenarios of cooperative communication, relay-...

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Problems solved by technology

[0004] In recent years, there are mainly deficiencies in the following aspects: 1) There are few dynamic resource allocation algorithms that comprehensively consider resource optimization issues such as relay selection, subcarrier pairing, and power allocation; 2) A large part of research is aimed at Centralized relay system or downlink OFDMA relay system; 3) In terms of resource allocation, it is difficult to model according to the actual situation, and to take into account performance optimization and fairness guarantee. For this point, it is especially worth introducing non-cooperative game, which is introduced as It provides a new method to solve the distributed resource allocation problem in wireless communication systems, especially the resource allocation problem in which "selfish" participants have conflicts of interests and compete with each other

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