Interference suppression method based on partial frequency reuse and base station collaboration in heterogeneous cloud wireless access network

Abstract

The invention discloses an interference suppression method based on partial frequency reuse and base station collaboration in a heterogeneous cloud wireless access network. The method comprises the following steps: when frequency bands are distributed, considering a user number, user levels, geographical location and other information, wherein users of a macro base station center and a remote radio frequency unit center share the same frequency band, thereby improving the frequency utilization rate; when collaborative base stations are selected, adding remote radio frequency in the same sector in a collaborative base station candidate set, wherein the remote radio frequency unit can be selected to reduce the power consumption under the condition of the same interference strength; and setting the user levels, and adding the weights of senior users, so that the bandwidths available for the senior users are higher than those of ordinary users, and the flexibility of resource allocation is improved.

Description

technical field [0001] The invention relates to an interference suppression method based on partial frequency reuse and base station cooperation in a heterogeneous cloud wireless access network. Background technique [0002] With the increasing demand for data communication services and the diversification of mobile multimedia services, the traditional cellular system can no longer meet the needs. As a new wireless network architecture, the heterogeneous cloud wireless access network will Greatly improve the spectral efficiency and energy efficiency of wireless networks [1] . The heterogeneous cloud wireless access network fully combines the advantages of cloud wireless access network and heterogeneous network. A large number of low-power wireless remote radio units coexist with high-power nodes, providing users with high-speed data services and seamless coverage. . Multiple baseband processing units are gathered together to form a baseband processing unit pool, which per...

AI Technical Summary

Problems solved by technology

[0005] (1) The frequency utilization rate of the micro base station is low: Since the micro base station only uses a fixed frequency, the frequency utilization rate is much lower than that of the macro base station. In the heterogeneous cloud wireless access network access network, a large number of users access to In the low-power node, that is, the remote radio unit, the interference to the user at the center of the low-power node is small, and the frequency band available to the user at the center of the remote radio unit should be increased

[0006] (2) High power consumption: Due to the high transmission power of the macro base station, the joint macro base station in the neighboring cell cooperates with users with low SINR, which not only consumes a lot of power consumption, but also attracts the macro base station in the neighboring cell to other Interference from non-cooperating users

Images