Hanset for a multiple channel communication system and use there

Details Hanset for a multiple channel communication system and use there Hanset for a multiple channel communication system and use there

1993-11-03

1995-11-28

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

455 62, 455 63, 375224, H04B 1700

Patent

active

054716713

ABSTRACT:
A handset (24, 25) in a radio communication system (20) determines the quality of a channel (500 and 502) in response to an RSSI signal generated by a receiver (174) in combination with either an eye closure measurement (510) or a bit error rate detected by a CRC codeword in received digital information (502). The battery operated handset is also capable of conserving scanning power while operating in an area having high channel quality (520, 560, 566). The handset also has a method for determining the amount of handovers between base stations (21, 22, 23) by use of dual channel quality thresholds (582, 590) which require a higher quality threshold for establishing communication with a base station and a reduction in channel quality before a handover to a new base station.

REFERENCES:
patent: 4309771 (1982-01-01), Wilkens
patent: 4449223 (1984-05-01), Liskov et al.
patent: 4887265 (1989-12-01), Felix
patent: 5170485 (1992-12-01), Levine et al.
patent: 5280630 (1994-01-01), Wang
patent: 5333147 (1994-07-01), Nohara et al.
Richard C. Bernhardt, "An Improved Algorithm for Portable Radio Access", Proceedings of the 38th IEEE Vehicular Technology Conference, Jun. 15-17, 1988, pp. 163-169.
Richard C. Bernhardt, "User Access in POrtable Radio Systems in a Co-Channel Interference Environment", IEEE Journal of Selected Areas in Communications vol. 7, No. 1, Jan. 1989, pagers 49-58.
Richard C. Bernhardt, "Call Performance in a Frequency Reuse Digital POrtable Radio System", IEEE Transactions on Vehicular Technology vol. 40, No. 4 Nov. 1991, pp. 74-82.

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