Power distribution method and device in DASs (Distributed Antenna Systems) containing D2D (Device to Device) communication in multiplexing mode

Abstract

The invention is applicable to the technical field of base station communication, and provides a power distribution method in DASs (Distributed Antenna Systems) containing D2D (Device to Device) communication in a multiplexing mode. The optimal power distribution method applicable to maximizing the SE (Spectral Efficiency) comprises the steps of firstly performing initialization, and then calculating P1(i) corresponding to the i-th iteration according to a formula of a CCCP algorithm; enabling i=i+1, calculating P1(i+1) corresponding to the (i+1)-th iteration; if a 2-norm of the difference between P1(i+1) and P1(i) is less than [xi], enabling P1(i+1) to be the optimal power, and terminating the iterative operation; and the method applicable to maximizing the EE (Energy Efficiency) comprises the steps of firstly performing initialization, and then calculating P2(t) corresponding to the t-th iteration according to the formula of the CCCP algorithm; enabling t=t+1, calculating P2(t+1) corresponding to the (t+1)-th iteration; substituting the calculated P2(t+1) into the energy efficiency EEd2d of the system after the D2D communication is added to calculate [omega]1(t+1); and if an absolute value of a transformed optimization function h1(P2(t+1), [omega]1(t+1)) when the EE is maximized is less than [xi], enabling P2(i+1) to be the optimal power, and terminating the iterative operation. The method provided by the invention improves the communication quality of a communication cell and reduces the energy consumption.

Description

technical field [0001] The invention belongs to the technical field of base station communication, and in particular relates to a power allocation method and device in a DAS including D2D communication in a multiplexing mode. Background technique [0002] With the rapid development of the data age, the rapid growth of communication rate and energy consumption has become a huge challenge for modern wireless communication networks. Due to the natural defects of the centralized antenna system (Co-located Antenna Systems, CAS), in order to meet the growing business needs, researchers have proposed the Distributed Antenna Systems (Distributed Antenna Systems, DAS). It has become an effective means to increase the bandwidth of the communication system, meet the user's communication quality and reduce the energy consumption in the communication. DAS is different from traditional CAS, all its base station antennas are scattered in the whole cell, because of this, it can effectively...

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Problems solved by technology

[0004] Most of the research on D2D communication is concentrated in CAS. A large number of studies have shown that D2D communication in CAS can effectively increase the capacity of the communication cell and improve the energy efficiency of the communication cell; but in the research, there are few studies. Consider the case of combining DAS and D2D communication

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