Soft space frequency multiplexing method and device, base station

Abstract

The invention discloses a soft spatial-frequency reuse (SSFR) method and an apparatus thereof, and a base station. The method comprises the following steps that: according to intensity of a pilot signal feedbacked by a user, an area of a cell that the user is located at is determined as well as frequency resources that are available for the user are determined; according to the frequency resources that are available for the user, corresponded transmitting powers are distributed and resource scheduling is carried out; according to a resource scheduling result, group users are selected, wherein the group users include users that use the same physical resource block (PRB) as the user uses in the same cell and a neighboring cell; a minimum interference leakage matrix is obtained according to the group users as well as under the minimum interference leakage matrix, the interference of downlink data of the user on the set user is minimum, wherein the downlink data are sent by a serving base station of the cell that the user is located at; a precoding matrix of the user is obtained according to the minimum interference leakage matrix; and on the basis of the precoding matrix, precoding is carried out on the downlink data so as to obtain precoded data. According to the embodiment of the invention, on the condition that the total throughput of a cell is not reduced, the throughput of a cell edge area (CEA) is increased.

Description

technical field [0001] The present invention relates to communication technology, in particular to a soft spatial-frequency reuse (hereinafter referred to as: SSFR) communication method and device, and a base station. Background technique [0002] At present, there are two types of downlink interference coordination technologies commonly used in Orthogonal Frequency Division Multiple Access (hereinafter referred to as OFDMA) networks: one is soft frequency multiplexing (soft frequency reuse, hereinafter referred to as: SFR) technology, One type is a partial frequency reuse (partial frequency reuse, hereinafter referred to as: PFR) technology. [0003] The SFR technology divides all available frequency resources of a cell into available resources in the central area and available resources in the edge area. Among them, the available resources in the central area are transmitted at reduced power, that is, partial power transmission, the available resources in the edge area ar...

AI Technical Summary

Problems solved by technology

[0011] Since the available resources in the edge area of ​​the cell are transmitted at full power, while increasing the amount of available resources at the edge of the cell, it also increases the interference between adjacent cells. Not only will there be interference between the edge areas of adjacent cells, but also Interference will also occur between different areas of the cell, which reduces the Signal to Interference Plus Noise Ratio (Signal to Interference Plus Noise Ratio, hereinafter referred to as: SINR) of users in the edge area of ​​the cell, thereby reducing the throughput of the edge area of ​​the cell; When the total amount of available resources is constant, increasing the available resources in the edge area of ​​the cell will reduce the amount of available resources in the center of the cell, thus resulting in a decrease in the total throughput of the cell

Images