A Method of Interference Management and Resource Allocation in Heterogeneous Networks

Abstract

The invention discloses an interference management and resource allocation method in a heterogeneous network. The interference management and resource allocation method in the heterogeneous network comprises the steps of adopting a separate frequency spectrum and shared frequency spectrum co-existing hybrid frequency spectrum allocation mechanism, to be specific, adopting a separate frequency spectrum scheme between a macro-base station and small cell base station clusters adjacent to the macro-base station, and adopting a shared frequency spectrum scheme between the MBS and SC BS clusters which are far away from the MBS; realizing frequency spectrum allocation between the Macrocell and the Small cell by adopting an adaptive allocation method; solving a target planning problem by adopting a dual decomposition method when a user rate demand is met and fairness is guaranteed; and performing channel and power allocation on the SC BS in each cluster by adopting the optimal resource allocation algorithm and a suboptimal allocation algorithm. Under the precondition of guaranteeing the user satisfaction and fairness, the interference management and resource allocation method in the heterogeneous can efficiently suppress interference and also can increase the resource utilization rate.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for interference management and resource allocation in a heterogeneous network. Background technique [0002] As more and more business needs occur in the indoor environment, the coverage performance of the macro cell (Macrocell) in the indoor environment is poor due to the loss through the wall. Therefore, the deployment of small cells (Small cells) indoors forms a heterogeneous The network is considered by the industry to be an effective means to solve indoor mobile communication coverage. Small cell is a low-power, low-cost small base station installed by users. It can not only provide users with high-quality indoor experience, but also share spectrum with Macrocell to reduce operators' operating and expenditure costs. [0003] However, the introduction of small cells has affected the topology of traditional macro cellular networks. The newly formed h...

AI Technical Summary

Problems solved by technology

Among them, the so-called spectrum sharing means allowing Macrocell and Smallcell to occupy the same channel bandwidth. This method will cause serious cross-layer interference and limit system capacity.

At the same time, in the implementation process, considering security issues, a coordination mechanism is needed between the macro base station (Macrocell Base Station, MBS) and the small cell base station (Small cell Base Station, SC BS), which makes the implementation of the method relatively complicated

The so-called spectrum separation means that the spectrum is divided into two parts for Macrocell and Small cell respectively. This method is simple to implement and can completely avoid cross-layer interference. However, the spectrum resources that Macrocell and Small cell can use are very limited, so it will also limit system capacity

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