Method and system for reducing PRACH interference

摘要

Disclosed is method and apparatus to help reduce PRACH interference. In accordance with the disclosure, when a first base station determines that there is a threshold level of interference from a second base station, the first base station transmits to the second base station a directive that causes the second base station to reduce PUSCH transmission in PUSCH resources that are coincident in frequency with the first base station's PRACH. In a scenario where two base stations provide overlapping coverage and operate on the same frequency as each other, and where coverage of the second base station may interfere with coverage of the first base station, this process may thereby help to minimize or eliminate interference that PUSCH communication in the second base station's coverage area would have on PRACH communication in the first base station's coverage area.

主权项

1. A method operable in a wireless communication system including multiple base stations that each operate on at least a common frequency bandwidth, wherein each base station is configured to provide wireless service on a respective air interface defining within the frequency bandwidth a respective physical random access channel (PRACH) and a respective physical uplink shared channel (PUSCH), the method comprising:
detecting, by a first one of the base stations, threshold air interface interference from a second one of the base stations; and responsive to at least the detecting, transmitting from the first base station to the second base station a directive causing the second base station to reduce PUSCH transmission in PUSCH resources that are coincident in frequency with the first base station's PRACH, wherein reducing PUSCH transmission in PUSCH resources comprises reducing coding rate for transmission in the PUSCH resources.