Timing adjustment for synchronous operation in a wireless network

摘要

Techniques for adjusting transmit timing of base stations and user equipments (UEs) in a wireless network are described. In one operating scenario, a femto base station communicates with a femto UE, and a macro base station communicates with a macro UE located within the coverage of the femto base station. In an aspect, the transmit timing of the femto base station may be delayed relative to the transmit timing of the macro base station, e.g., to time align downlink signals from the femto and macro base stations at the femto and macro UEs. In another aspect, the transmit timing of the femto UE may be advanced relative to the transmit timing of femto base station by an amount larger than twice the propagation delay between the femto UE and the femto base station, e.g., to time align uplink signals from the femto and macro UEs at the femto base station.

主权项

1. A method for wireless communication, comprising:
detecting presence of a first base station by a second base station; and delaying transmit timing of the second base station relative to transmit timing of the first base station, wherein the delaying the transmit timing of the second base station comprises:
receiving an uplink transmission from a user equipment (UE) at the second base station, wherein the UE communicates with the first base station, and wherein transmit timing of the UE is advanced relative to the transmit timing of the first base station; anddetermining the transmit timing of the second base station based on receive time of the uplink transmission from the UE at the second base station.