Energy saving method of BBU (Base Band Unit) pool under C-RAN (Cloud Radio Access Network) architecture

Abstract

The invention discloses an energy saving method of a BBU (Base Band Unit) pool under a C-RAN (Cloud Radio Access Network) architecture, and belongs to the field of mobile communication. The energy saving method comprises the particular steps of: firstly, establishing a system model of users, RRHs (Remote Radio Heads) and the BBU pool; acquiring rates of transmitting the RRHs connected with a certain specific BBU to the users and a pre-coding matrix; calculating a transmission power usage rate rho trans and a traffic usage rate rho traff; then calculating a resource usage rate rho BBU of the specific BBU, and setting a kernel variable; pre-defining an upper limit and a lower limit of the resource usage rates of the BBUs, and defining four types of the BBUs; calculating the resource usage rates of all the BBUs in the BBU pool, carrying out partitioning according to four types and carrying out statistics on the numbers of various types; and finally, according to the kernel variables and the type numbers of all the BBUs in the BBU pool, carrying out switching among the BBUs to achieve energy saving. The energy saving method has the advantages that the resource usage rate of the specific BBU can be calculated and states of the BBUs can be dynamically switched; in the case of not influencing QoS of the users, one part of active BBUs in the BBU pool are closed and are enabled to enter a sleep state so as to save energy consumption.

Description

Technical field [0001] The invention belongs to the field of mobile communication, and specifically relates to an energy-saving method for a baseband processing pool under the C-RAN (Cloud Radio Access Network) architecture. Background technique [0002] With the increase of smartphones and tablets, mobile data traffic is growing rapidly. It is estimated that mobile data traffic will increase 13 times from 2012 to 2017. In order to meet this growing demand, operators need to deploy more equipment, capital expenditure (CAPEX) and operating expenditure (OPEX) will increase accordingly, and at the same time will lead to more energy consumption. On the other hand, operators also face the corporate responsibility of energy conservation and emission reduction. In response to this situation, a radio access network (Cloud Radio Access Network, C-RAN) emerged. C-RAN is a green radio access network architecture based on centralized processing, cooperative radio, and real-time cloud compu...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem of waste of energy consumption when the BBU is idle in the prior art, and proposes an energy-saving method for the baseband processing pool under the C-RAN architecture

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