Energy consumption optimization method for D2D communication in single cell

Abstract

The invention provides an energy consumption optimization method for D2D communication in a single cell. A D2D user resource allocation strategy based on optimal matching of bipartite graphs is proposed. On the premise of not exceeding the system capacity, an appropriate time is selected, and an appropriate cellular link is selected to match with a D2D transmission link, so that the energy consumption of the system is optimal; experiments prove that compared with maximum power transmission, the energy loss of an optimal allocation strategy based on the Hungarian algorithm can be reduced by 40%, and with the increase of the number of users , energy saving is more obvious; further, compared with some common distance-based allocation strategies, such as closest allocation, farthest allocation, random allocation, the energy consumption of the optimal allocation strategy is the lowest in all allocation strategies, and thus the optimal allocation strategy can replace the traditional maximum power transmission scheme and the distance-based resource allocation scheme.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to an energy consumption optimization method for D2D communication under a single cell. Background technique [0002] As one of the key technologies of next-generation wireless communication, D2D (terminal direct to device to device) communication can provide higher transmission rate, increase system throughput, improve spectrum utilization efficiency, reduce the burden of cellular base stations, and enhance system stability, etc. . [0003] The energy consumption problem of D2D communication is closely related to the resource allocation problem of D2D, and the energy consumption under different allocations is very different. The distance-based resource allocation strategy provides a set of allocation criteria for resource allocation, which can meet the transmission requirements of cellular users and D2D users, but will cause a large waste of energy. If a simple maximum power t...

AI Technical Summary

Problems solved by technology

For a given rate requirement, as the transmission rate increases, the required transmission time will become smaller, but the transmission energy loss will still increase, so in order to reduce the energy loss, the transmission rate needs to be reduced

However, as the transmission rate decreases, the required transmission time will become longer and the energy loss of the circuit will increase

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