초록 ▼

In time domain multiplex/time domain multiple access communications between a base station and subscriber unit, the base station sends a timing reference signal. A subscriber unit responds with a data packet (a) sufficiently short to ensure correct reception by the base irrespective of transmission

In time domain multiplex/time domain multiple access communications between a base station and subscriber unit, the base station sends a timing reference signal. A subscriber unit responds with a data packet (a) sufficiently short to ensure correct reception by the base irrespective of transmission time. The base determines the transmission time taken and instructs the subscriber unit to advance its timings so that longer data packets (b) can be sent so as to be received when expected. The timing adjustment includes both a fixed present component dependent on approximate separation of base station and subscriber unit, and a second component from measurement of the transmission time taken.

대표청구항 ▼

[ We claim:] [1.] A method of controlling the timing of transmissions of data packets from at least one first transmitting and receiving unit (NTE) to a second transmitting and receiving unit (BTE) in predetermined time slots within fixed length time frames, the second unit transmitting a timing ref

[ We claim:] [1.] A method of controlling the timing of transmissions of data packets from at least one first transmitting and receiving unit (NTE) to a second transmitting and receiving unit (BTE) in predetermined time slots within fixed length time frames, the second unit transmitting a timing reference signal to a first unit, the first unit transmitting in response a relatively short first packet at a time dependent on a preset first value, the first value being a predetermined estimate of the propagation delay dependent on the approximate separation of the first unit and the second unit, the second unit determines a second value dependent upon the actual propagation delay from the time of reception of the first packet, and the second unit transmits an adjustment signal dependent upon at least the second value to the first unit to adjust the timing of subsequent transmissions of relatively long packets from the first unit in response thereto.