Weight-based HeNB interference coordination method

Abstract

The present invention discloses a weight-based HeNB interference coordination method. The method comprises the steps that a cognitive engine analyzes a channel state from a PHY layer and considers a real-time conflict probability of an MAC layer and a service demand of an application layer so as to detect blank resource blocks (RB) intelligently; a CR-HeNB self-configuration module acquires related data from a spectrum state database so as to perform adaptive configuration; a home cell coverage is divided into a center area and an edge area, a fractional spectrum resource that can be dynamically used is divided from a system bandwidth, and adjacent home cells acquire the edge spectrum resource in a dynamic competition manner; and few CR-HeNBs among densely deployed HeNBs are used as center nodes, and the CR-HeNBs detect in time idle RBs in a frequency domain, a time domain and a space domain, learn related information of each HeNB, make an optimal policy in a centralized manner, and deliver a control signal to each node, so as to implement interference coordination.

Description

technical field [0001] The invention relates to the communication field, in particular to a weight-based home base station interference coordination method. Background technique [0002] LTE-A is an evolved version of LTE. LTE-A is committed to achieving lower transmission delay and higher transmission rate. Due to the characteristics of "indoor traffic, hotspot effect, low-speed movement, and high-speed data" in mobile Internet services, in order to improve wireless coverage and enhance user experience, 3GPP proposed a solution for LTE-A heterogeneous networks (Heterogeneous Networks, HetNet). A home base station (Home eNodeB, HeNB / Femtocell) is introduced as a low-power node to improve indoor coverage quality and increase spectrum efficiency. [0003] There is serious HeNB-HeNB inter-cell interference in the scenario of dense deployment of Femtocells. The same-layer interference between home cells seriously affects the performance of the network and reduces the service q...

AI Technical Summary

Problems solved by technology

The same-layer interference between home cells seriously affects the performance of the network and reduces the service quality of mobile communication services

Although the traditional frequency domain interference coordination method - Fractional Frequency Reuse (FFR) can improve the overall SINR of the home cell, the static resource allocation scheme is difficult to adapt to different service distributions, resulting in low spectrum utilization

The FFR interference coordination method has two disadvantages: First, the completely orthogonal edge frequency band allocation scheme reduces the available spectrum resources at the edge of each cell

Second, in reality, the traffic volumes in the edge areas of different family cells are different, and the fixed edge bandwidth ratio is used in the static FFR scheme, resulting in low spectrum efficiency and unfair spectrum resource allocation in cells with small edge business requirements.

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