Beacon symbol orthogonalization

摘要

Beacon symbols are sent periodically from the base stations in an OFDM system. The entire power of the base station, or a large portion of it is concentrated in these symbols, thus they are very easily recognized by the mobile stations. The frequencies upon which these symbols are transmitted and the time at which they are transmitted communicates information such as the base station/sector identity and the preferred carrier of the given base station/sector to the mobile station. In order to avoid collision between the beacon symbols of different base stations and sectors, the beacon symbols from different base stations/sectors are transmitted at different symbols times and on different subcarriers.

主权项

1. A method of transmitting beacon symbols in different symbol periods or time slots of a superframe in an OFDM configuration and on the same or different subcarriers to mitigate collision with beacon symbols from other sectors and grow the number of available independent channels for beacon symbol transmissions as a factor of the additional available symbol periods, comprising:
determining one or more symbol periods for sending one or more beacon symbols in different symbol periods of a superframe and on different subcarriers to reduce or avoid collision with one or more disparate beacon symbols from a disparate source, the one or more symbol periods being determined from a subset of symbol periods useable for transmitting beacon symbols; and growing the number of available independent channels for beacon symbol transmissions as a factor of the additional available symbol periods by sending the one or more beacon symbols in the one or more determined symbol periods.