Method and system for lowering downlink out-of-band radiated interference of micro cell to macro cell terminal

Abstract

The invention discloses a method and a system for lowering descending out-of-band radiated interference of a micro cell to a macro cell terminal. The method comprises the following steps: a micro cell determines the time-frequency sources position used by an uplink channel of a macro cell terminal on a second frequency band; the radio frequency power or the radio frequency signal intensity of signals emitted by the macro cell terminal to the micro cell is measured on the time frequency position, and the measurement result and / or recognition information of the macro cell terminal are / is reported to a network side; the network side determines the macro cell terminal suffering from strong downlink out-of-band radiated interference of the micro cell by utilizing the content reported by the micro cell, and assigns downlink channel resources out of a first downlink out-of-band radiated interference isolation frequency band for the macro cell terminal on the first frequency band, and / or assigns downlink channel resources out of a third downlink out-of-band radiated interference isolation frequency band for micro cell wireless switched points of the micro cell on a third frequency band. According to the scheme, the out-of-band radiated interference of the macro cell terminal subjected to the micro cell strong interference of micro cell wireless switched points can be lowered.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and a system for reducing downlink out-of-band radiation interference from a micro cell to a macro cell terminal. Background technique [0002] In order to increase the system capacity and improve the flexibility and efficiency of spectrum use, more and more radio access networks adopt a networking mode combining macro cell coverage and micro cell coverage. In the actual networks of some operators, femtocells or microcell base stations have been applied. In standard discussions, the Long Term Evolution (LTE for short) of the 3rd Generation Partnership Project (3GPP) In the system, digital repeater (RELAY) technology and femtocell technology have also been discussed periodically, and the standardization of the heterogeneous network (HetNet) composed of micro cells and macro cells has also attracted the attention of operators and equipment manufacturers in 3GP...

AI Technical Summary

Problems solved by technology

[0011] In terms of spectrum sharing between macro cells and micro cells, the above document 2 provides a method for allocating resources for micro cell terminals by using the information contained in the control command sent by the macro base station to the macro cell terminal, including the realization of micro cell terminals and macro cells There is a method for spatially multiplexing macro cell resources between cell terminals, but there is no method for controlling the adjacent channel interference of micro cell wireless access point transmission channels to macro cell terminals

[0012] In terms of suppressing adjacent frequency interference, the above-mentioned document 3 provides a method for a terminal to suppress adjacent frequency band interference, which is aimed at outputting unilaterally filtered signals, and requires the introduction of a new filter in the terminal, which increases the complexity of the terminal

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