Method and device for scheduling users by low-power nodes in heterogeneous networks

Abstract

The embodiment of the invention provides a scheduling method and device of users corresponding to low power nodes in a heterogeneous network. The method comprises that: the low power nodes determine pre-coding matrixes according to the signal channel information of user terminals and the position information of the user terminals; the maximum rates of the user terminals are calculated; determining a target user terminal according to the maximum rates corresponding to every user terminal and the average throughput rate, distributing spectrum resource to the target user terminal. According to the embodiment of the invention, the pre-coding matrixes are determined according to the signal channel information of the user terminals and the position information of the user terminals; interference among layers is eliminated by the pre-coding matrixes; the angle of an antenna is adjusted through spectrum sensing; a new interference coordination technique is realized; the problem of great interference among the nodes in the traditional heterogeneous network is solved; the average throughput rate of the user terminals is determined through the maximum rates of the user terminals; the throughput capacity of the heterogeneous network is improved; and the balance between system performance and fairness is ensured through user scheduling based on a proportional fairness algorithm.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular to a method and device for scheduling users by low-power nodes in a heterogeneous network. Background technique [0002] As one of the key technical means of the third-generation mobile communication technology, the heterogeneous network (Heterogeneous Network, referred to as HN) adopts a hybrid structure including macro cells, radio remote and low power nodes (Low Power Node, referred to as LPN). Among them, LPN includes pico-cells, femto-cells, relays and other forms, which can not only effectively solve the coverage problem of the cellular network, but also improve the utilization rate of spectrum resources in the cellular network. [0003] A typical heterogeneous network includes two types of access points, a macro base station and a low-power node. A single-antenna user can be served by a macro base station or a low-power node. If a single-ant...

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Problems solved by technology

[0004] In the prior art, users served by low-power nodes are subject to greater interlayer interference from macro base stations or adjacent low-power nodes, and the system throughput in heterogeneous networks is small. In addition, low-power nodes in heterogeneous networks are The user's scheduling method cannot guarantee the balance between system performance and fairness

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