Mobile station apparatus and base station apparatus

Details Mobile station apparatus and base station apparatus Mobile station apparatus and base station apparatus

1994-10-26

1997-04-29

Olms, Douglas W.

Multiplex communications

Communication over free space

Combining or distributing information via time channels

370350, 455 331, H04J 316

Patent

active

056256272

ABSTRACT:
A mobile station apparatus and a base station apparatus for carrying out mobile communications according to TDMA technique and time alignment control are provided, wherein a guard time of a signal transmitted from a mobile station is reduced to improve the transmission efficiency, and also instantaneous disconnection of data signal at the time of channel switching is shortened. A measuring unit measures the received electric field strength of a radio wave from a base station, and a readout unit reads a time alignment value from a correlation table stored in a storage unit, based on the received electric field strength measured by the measuring unit. The correlation table is obtained beforehand through measurement or the like, taking account of a correlation found between the received electric field strength and time alignment value. A transmitting unit transmits data to the base station according to transmission timing adjusted based on the time alignment value read by the readout unit. The correlation table may alternatively be stored in the base station, or where no correlation table is used, the time alignment value may be calculated.

REFERENCES:
patent: 5355515 (1994-10-01), Sicher
patent: 5404376 (1995-04-01), Dent
patent: 5471649 (1995-11-01), Rees et al.

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