Method and device for dynamic time-domain interference coordination in heterogeneous networks

Abstract

The present invention provides a method for the dynamic time domain interference coordination of a heterogeneous network. The method comprises the steps of acquiring the available ABS modes and the available levels of a system according to the current time slot configuration of the system by a macro cell; conducting the load evaluation by the macro cell to obtain the cell load of the macro cell; receiving a cell-edge user load sent from a pico cell by the macro cell, wherein the cell-edge user load is obtained through the load evaluation of the pico cell; judging whether to adjust the current ABS mode of the system or not by the macro cell according to the cell-edge user load and the cell load; and determining a final ABS mode. The invention also provides an apparatus for the dynamic time domain interference coordination of the heterogeneous network. The apparatus comprises an acquisition module, an evaluation module, a receiving module and a determining module. According to the invention, the reasonable configuration of ABS resources is realized. Therefore, the optimized configuration of system resources in cross-layer cells is realized. Meanwhile, the higher interference coordination performance gain and the higher system capacity gain are obtained.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for dynamic time-domain interference coordination of heterogeneous networks. Background technique [0002] In order to solve the unbalanced load problem of cross-layer cells in heterogeneous networks and improve the utilization rate of system resources, the Long Term Evolution-advanced (LTE-A) system introduces Cell Range Expansion (CRE) technology, namely An offset is added to the Reference Signal Receiving Power (RSRP) of the pico cell, so that a macro cell user close to the pico cell selects to access the pico cell. Since the serving cell of the user equipment (User Equipment, UE) in the CRE area is not the cell with the strongest signal, the UE often suffers serious downlink interference from the macro cell. [0003] In order to solve this problem, LTE-A proposes a downlink enhanced interference coordination method based on time domain resource coo...

AI Technical Summary

Problems solved by technology

[0004] The existing dynamic time-domain interference coordination method mainly has two defects: 1) the ABS subframe PRB utilization rate reported by the X2 interface cannot effectively reflect the load situation of the user at the edge of the pico cell; 2) the available ABS mode reported by the X2 interface is only It can be a subset of or the same as the ABS subframe pattern indicated by the Load Information message, and cannot reflect the situation that the demand for the number of ABS subframes increases as the edge user load of the pico cell increases

Based on the above two problems, although the existing technical solutions adjust the ABS configuration mode as the load of the macro cell or pico cell changes, the subframe resources corresponding to the ABS mode may not be optimal, which not only affects the interference coordination performance, but also reduces the utilization of system resources

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