Method and system for reducing inter-cell interference using intra-ENB downlink coordinated multipoint services

摘要

A system and method of cancelling downlink inter-channel interference between a first selected UE in one sector of a cell and a second selected UE in a second sector of said cell by using intra-eNB DL CoMP is described. UEs which are affected by ICI are identified in sectors which are adjacent to each other in the cell. A downlink CoMP operational set is formed for the identified UEs. Channel matrix blocks are estimated for the first and second selected UEs. The channel matrix blocks are representations of the channel characteristics between the first and second UE, in their respective sectors and the serving base station. The estimated channel matrix blocks are then loaded into a cross-sector channel block matrix. The inverse values of the channel matrix blocks are then calculated to form a sector specific cross-sector pre-coding matrix which is used to enable interference cancellation.

主权项

1. A method of cancelling inter-channel interference between a first selected UE in one sector of a cell and a second selected UE in a second sector of said cell, comprising the steps of:
a) estimating channel matrix blocks for said first and second selected UEs, said channel matrix blocks being representative of the channel characteristics between said first and second UE, in their respective sectors and a serving base station; b) loading said estimated channel matrix blocks into a cross-sector channel block matrix; c) calculating the inverse values of said channel block matrix to form a sector specific cross-sector pre-coding matrix; d) performing a pre-coding operation on input data of the formed pre-coding matrix to generate an output signal; and e) using said pre-coding matrix output signals to enable interference cancellation.