High energy efficiency base station on/off selection method in cloud radio access network (CRAN)

Abstract

The invention discloses a high energy efficiency base station on / off selection method in a cloud radio access network (CRAN). Due to optimization of a beam forming precoding matrix, transmitting power consumption is lowered; and a base station on / off state and a connection between a base station and users are adjusted according to an optimized beam forming precoding matrix, so that link power consumption is lowered and total network power consumption is lowered. Firstly, iteration solution is performed on the beam forming precoding matrix through relaxation on total network power consumption by a reweighted method and limiting on an objective function by a forwarding link capacity; when a weighting factor is given, the beam forming precoding matrix is designed by use of a standard convex optimization method; the weighting factor is updated according to the optimized beam forming precoding matrix; and then the base station on / off state is determined according to the optimized beam forming precoding matrix, so that the user demand is met when some base stations are closed, and the total power consumption of the whole network is minimized. The method can save network power consumption more effectively, and is applicable to the design of a cloud computing radio access network featured by limited forwarding. Through adoption of the method, fewer base stations provide a cooperative service for specific users.

Description

technical field [0001] The invention relates to a method for efficiently implementing base station switch selection in a cloud computing radio access network (CloudRadioAccessNetwork, C-RAN) under the condition that the capacity of a fronthaul link is limited, and belongs to the technical field of mobile communication. Background technique [0002] In recent years, more and more serious environmental problems have been faced by human beings, and energy saving, consumption reduction and emission reduction have become the general trend. As a service industry, communication relies on a large number of industrial products, such as base stations, terminal equipment, transmission lines, etc. These will double with the large-scale expansion of the network market, and consume a lot of energy. Therefore, the concept of "green communication" was born. Green Communications (Green Communications) refers to a new generation of communication concepts for energy saving, emission reduction...

AI Technical Summary

Problems solved by technology

However, the shutdown of some base stations will increase the load of the part of the base station that is turned on. At the same time, the coordinated transmission will also enable the base station to serve more users and increase the transmission rate of the fronthaul link.

In the actual cloud computing wireless access network, due to the limitation of the fronthaul link capacity, the switch selection of the base station and the design of beamforming precoding become more complicated

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