초록 ▼

A central controller (10) controls the operation of a code division multiple access (CDMA), spread spectrum communication system, which includes base stations (15) and portable transceivers (20) for communicating with the base stations (15). The central controller (10) stores a plurality of seeds, w

A central controller (10) controls the operation of a code division multiple access (CDMA), spread spectrum communication system, which includes base stations (15) and portable transceivers (20) for communicating with the base stations (15). The central controller (10) stores a plurality of seeds, which are used by the portable transceivers (20) in generating pseudo-noise (PN) sequences, and, in response to requests from base stations (15), the central controller (10) distributes at least a portion of the assignable seeds to each of the requesting base stations (15). The base stations (15) that have received seeds from the central controller (10) subsequently transmit the seeds over the air to the portable transceivers (20) within their respective coverage areas. The portable transceivers (20) then utilize the seeds to generate spread spectrum signals for reception by a closest base station (15) having a coverage area in which they are located.

대표청구항 ▼

[ We claim:] [1.] A method for distributing at least a portion of a plurality of seeds which are used by pseudo-noise (PN) generators to spread and despread spread spectrum signals in a spread spectrum code division multiple access (CDMA) communication system comprising base stations for communicati

[ We claim:] [1.] A method for distributing at least a portion of a plurality of seeds which are used by pseudo-noise (PN) generators to spread and despread spread spectrum signals in a spread spectrum code division multiple access (CDMA) communication system comprising base stations for communicating with portable transceivers, the communication system further comprising a central controller having a memory for storing the plurality of seeds in a database and a processing unit for controlling operation of the base stations and distribution of the at least a portion of the plurality of seeds to the bases stations via a data port, the method comprising the steps of:at the central controller(a) receiving a seed request from a first base station coupled to the central controller by the data port,(b) determining which of the plurality of seeds stored in the database are available seeds that are used for communication between the first base station and one or more portable transceivers within an associated coverage area thereof without interfering with other base stations within the communication system, and(c) providing a subset of the available seeds to the data port for transfer to the first base station; andat the first base station(d) subsequently transmitting the subset of the available seeds to the one or more portable transceivers for use in generating uniquely identifiable spread spectrum signals for reception by the first base station.