Cellular radio network

摘要

To avoid reference symbol collision, between reference symbols used by neighboring cells in an OFDM based cellular telecommunications network, the transmission symbols on a given subcarrier used by respective neighboring base stations are compared and where both transmission symbols are determined to be reference symbols the start time of the frame timing period of one of the base stations is adjusted.

主权项

1. A method of operating a radio network comprising a plurality of base stations and a plurality of subscriber stations, each base station being configured to transmit Orthogonal Frequency Division Multiplexed, OFDM, signals comprising a plurality of subcarriers, each subcarrier being modulated by transmission symbols, a predetermined number of transmission symbols defining a recurring frame timing period, the method comprising:
determining that respective transmission symbols of a first base station and a second base station on the same subcarrier and at the same time are both reference symbols, comprising:
establishing a link quality between a subscriber station and the first base station;establishing a received power level at the subscriber station from the second base station; anddetermining that the respective transmission symbols of the first base station and the second base station on the same subcarrier and at the same time are both reference symbols on the basis of the link quality corresponding to the first base station and the received power level corresponding to the second base station; and adjusting a start time of a frame timing period for the first base station.