Low-energy cooperation transmission method in heterogeneous network

Abstract

The invention discloses a low-energy cooperation transmission method in a heterogeneous network. A heterogeneous network system comprises a macro cell and a micro cell. The macro cell comprises a macro base station. The micro cell comprises a micro base station. A cooperation cluster is composed of the macro cell and the micro cell. The low-energy cooperation transmission method in the heterogeneous network includes a first step of obtaining normalization precoding of a Co MP-JP model, a micro base station (MBS) model and a micro base station (m BS) model based on P-ZFBF, a second step of constructing mixed cooperation precoding, wherein the Co MP-JP model, the MBS model and the m BS model are arrayed in a weighted and plural mode to obtain mixed precoding vector quantity of a user i of all base stations, a third step of ensuring data range of compound weighted coefficient amplitude value |Lambada ij| and obtaining circuit power consumption, signal processing power consumption, backbone network power consumption and emission power consumption in the data range and a fourth step of obtaining corresponding total power consumption of seven mixed models in the third step and obtaining a service model which enables the total power consumption to be the minimum, corresponding mixed precoding and the minimum power consumption. The low-energy cooperation transmission method in the heterogeneous network self-adaptively selects a cooperation model with the minimum power consumption, thereby achieving the minimum energy consumption.

Description

technical field [0001] The invention relates to a low-energy cooperative transmission method in a heterogeneous network, and belongs to the technical field of wireless communication. Background technique [0002] The energy consumed by the information and communication technology (ICT, Information and Communication Technology) industry is growing at a rate of 15-20% per year, making it an increasingly important factor in global greenhouse gas emissions. In order to reduce the impact of the ICT industry on the environment, more and more people have begun to pay attention to how to reduce the energy consumption of related industries. Green Communication (GR, Green Radio) is oriented to the future mobile communication system and aims to propose a network architecture and transmission technology with low energy consumption. It has attracted extensive attention from the industry and academia. See Reference 1. [0003] Research data shows that global mobile data traffic may incre...

AI Technical Summary

Problems solved by technology

[0005] From the perspective of energy consumption, CoMP-JP adopts multi-cell joint precoding to obtain higher array gain, so it can effectively reduce the power consumption of base station transmission; however, the higher computational complexity of multi-cell joint precoding will bring High signal processing power consumption; at the same time, the cooperative base stations need to share user data and channel information, which will increase the power consumption of the backbone network

In contrast, in CoMP-CB, each user's data is sent by only one base station, so the array gain of CoMP-CB precoding is low, and the transmission power consumption is large; but the lower-dimensional transmission precoding reduces Signal processing power consumption; and since there is no need to share user data information between base stations, the backbone network consumes less power

In addition, the power consumption of the circuit is an important part of the total power consumption of the base station, which depends on the working state of the base station (on or sleep). CoMP-JP and CoMP-CB cooperation modes both require the cooperative base station to work at the same time, so a higher circuit is required power consumption

The total energy consumption of CoMP-JP and CoMP-CB depends on the power consumption of each item, which is related to the user's data rate requirements. Therefore, when meeting user needs, a single cooperation mode will not always achieve the lowest energy consumption.

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