Methods for making active channel measurements in a personal bas

Details Methods for making active channel measurements in a personal bas Methods for making active channel measurements in a personal bas

1995-12-21

1998-03-10

Chin, Wellington

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

379 60, 455 331, 370310, H04B 7212

Patent

active

057269815

ABSTRACT:
A wireless communications system (1) has at least one base station, such as a personal base station (5), and a plurality of mobile stations (10) capable of wireless slotted communications with the at least one personal base station. A method includes a step of periodically deactivating, for a predetermined period of time, a base station transmitter (32) from transmitting a RF signal to at least one MS. A next step, executed during the predetermined period of time, operates a base station receiver (34) to perform a received signal strength (RSS) measurement. In a first embodiment of this invention the step of deactivating includes a preliminary step of reserving a reverse slot for use by the base station, thereby insuring that a mobile station will not transmit during the reserved slot. In this case the RSS measurement occurs during the reserved slot. In a second embodiment of this invention the step of deactivating includes an initial step of transmitting at least a synchronizing data pattern during the predetermined interval before disabling the transmitter, thereby enabling a mobile station to maintain synchronization with the base station even through the transmitter is switched off.

REFERENCES:
patent: 4989230 (1991-01-01), Gillig et al.
patent: 5214687 (1993-05-01), Kansakoski et al.
patent: 5260988 (1993-11-01), Schellinger et al.
patent: 5276691 (1994-01-01), Kivari
patent: 5483537 (1996-01-01), Dupuy
patent: 5574976 (1996-11-01), Schellinger
"TDMA Forum, Implementation Guide: Non-Public Mode Operation and Selection in IS-136 Compliant Mobile Stations", Version 2.0, Mar. 9, 1995.

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