Heterogeneous cellular network energy efficiency optimization method based on independent sets

Abstract

The invention discloses a heterogeneous cellular network energy efficiency optimization method based on independent sets, and belongs to the technical field of wireless communication. The method comprises the following steps that firstly, a transmission power initial value is given for each user, and independent sets of sub-channel users are determined based on a macro cell, a family base station user transmission power and sub-channel characteristics; secondly, a candidate matching scheme of the sub-channels and the independent sets is built, and a partial optimal sub-channel distribution scheme is determined based on sub-channel combined energy efficiency optimization; thirdly, a sub-channel matching scheme is given, user transmission power iteration and sub-channel matching updating are executed; fourthly, the above steps are repeated until a convergence condition is met, and a family base station user sub-channel and power combined optimization distribution scheme is obtained. The heterogeneous cellular network energy efficiency optimization method based on the independent sets can effectively guarantee the QoS requirement of heterogeneous cellular network macro users and family base station users, achieve spectrum resource sharing, and improve the spectrum utilization rate and network comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to the technical field of resource allocation of heterogeneous cellular networks, and relates to an energy efficiency optimization method for heterogeneous cellular networks based on independent sets. Background technique [0002] With the rapid development of wireless communication technology, all kinds of intelligent terminals are showing explosive growth trend, and rich and diverse data services are also emerging. The high-speed service needs of users pose a severe challenge to traditional cellular networks. Heterogeneous cellular network technology introduces other communication methods, such as relay sites, picocell sites, and home base stations, within the coverage of traditional macrocells, to strengthen the coverage of specific areas in a targeted manner and form multi-layer network coverage, which can effectively realize User QoS guarantee improves system res...

AI Technical Summary

Problems solved by technology

[0005] Existing research mainly focuses on maximizing system throughput as the optimization goal, and seldom considers the energy consumption of home base station users, which may lead to low user energy efficiency. For a large number of users, especially those using energy-sensitive terminals, the service experience will be seriously affected; In addition, the existing research considers the subchannel allocation or power allocation in the heterogeneous cellular network in isolation, without comprehensively considering the joint optimization of multiple factors, and cannot achieve the overall performance optimization of the network.

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