초록 ▼

An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an R

An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver. The BS transmitter transmits a broadcast common-synchronization channel, which includes a frame-timing signal. The broadcast common-synchronization channel has a common chip-sequence signal, which is common to the plurality of remote stations. In response to the RS-spread-spectrum receiver receiving the broadcast common-synchronization channel, and determining frame timing from the frame-timing signal, an RS-spread-spectrum transmitter transmits an access-burst signal. The BS-spread-spectrum transmitter, responsive to the BS-spread-spectrum receiver receiving the access-burst signal, transmits an acknowledgment signal. In response to the first RS-spread-spectrum receiver receiving the acknowledgment signal, the first RS-spread-spectrum transmitter transmits a spread-spectrum signal having data.

대표청구항 ▼

[ We claim:] [1.]1. A code-division-multiple-access (CDMA) wireless base station, comprising:a CDMA transmitter;a CDMA receiver; anda controller coupled to the CDMA receiver for responding to signals received via the CDMA receiver and coupled for controlling the CDMA transmitter, such that in operat

[ We claim:] [1.]1. A code-division-multiple-access (CDMA) wireless base station, comprising:a CDMA transmitter;a CDMA receiver; anda controller coupled to the CDMA receiver for responding to signals received via the CDMA receiver and coupled for controlling the CDMA transmitter, such that in operation the CDMA base station is for performing the following steps:receiving from a remote station an access burst comprising a sequence of coded preamble signals at sequentially increasing discrete power levels;detecting a first one of the coded preamble signals of the sequence that is received at an adequate power level;upon detection of the first coded preamble signal at the adequate power level, transmitting an acknowledgement signal;receiving from the remote station a remote station collision detection preamble;transmitting to the remote station a base station collision detection preamble corresponding to the received remote station collision detection preamble; andsubsequently, receiving any of data and control information over the common packet channel from the remote station, or transmitting any of data and control information to the remote station.