Interference coordination method of two-layer non-uniform topological structure heterogeneous network

Abstract

The invention provides an interference coordination method of a two-layer non-uniform topological structure heterogeneous network. According to the method, a frequency domain division coefficient is introduced; the frequency band of the ABS time slot is divided into two parts; one part is only used for a Pico base station; the other part is only used for an Macro base station. A problem model is built by using the maximum logarithm accumulation sum of the transmission speed of all users in the network as the target problem; the target problem is split into four sub problems to be sequentially solved; the four sub problems are respectively the user connection, the ABS ratio allocation, the frequency domain resource division and the power distribution. The method has the advantages that the interference of the special layer small intervals can be reduced; the total user speed of the system is accelerated; the fairness among the users is ensured.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to an interference coordination method for a heterogeneous network with a two-layer non-uniform topological structure. Background technique [0002] The demand for wireless data has grown rapidly in recent years. Traditional cellular networks can no longer meet the growing demand, so LTE-A heterogeneous networks (HetNets, Heterogeneous networks) are proposed to improve wireless spectrum efficiency. The so-called heterogeneous network is to add some low power nodes (LPN, Low Power node) on the basis of the original macro cell (Macro cell), and the two generally share the same frequency band. A high-power Macro cell will seriously affect the performance of the LPN. In order to solve the interference problem between different-layer cells, the LTE standard proposes a mode in which Macro base stations transmit silently in the time domain. This method is also called enhanced Intercel...

AI Technical Summary

Problems solved by technology

When the Pico base station is deployed near the center of the Macro base station, the users in the Pico base station will be more susceptible to the interference of the Macro base station, so the effect of using LP-ABS will be similar to that of ZP-ABS, because even the extremely low The power will also cause great interference to users in the Pico base station

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