Enabling coordinated multi-point reception

摘要

This invention measures the propagation delay τ1 between the user equipment and a first cooperating unit and the propagation delay τ2 between the user equipment and a second cooperating unit. These propagation delays are used to compute a timing advance amount to the user equipment to enable coordinated multi-point reception. In a first embodiment one cooperating unit receives a function of the propagation delay, computes the timing advance amount and transmits a timing advance command to the user equipment. In a second embodiment a central unit performs these operations.

主权项

1. A method of operating a base station, comprising:
measuring a propagation delay τ1 between a user equipment and the base station; computing a function g(f(τ2), τ1) using a function f(τ2) of another delay τ2 and the propagation delay τ1; computing a timing advance amount for the user equipment from the computed function g(f(τ2), τ1); and transmitting a timing advance command having the computed timing advance amount to the user equipment.