Mobile communications system and communication channel control m

Details Mobile communications system and communication channel control m Mobile communications system and communication channel control m

1994-05-09

1996-06-18

Kuntz, Curtis

Telephonic communications

Audio message storage, retrieval, or synthesis

379 59, 370 581, 370 951, H04Q 722

Patent

active

055286682

ABSTRACT:
In the construction of a mobile communications system wherein coder-decoder units for high-efficiency coding which should originally be placed in base stations are arranged in a concentrated manner in a mobile exchange office, a circuit changing-over switch is provided as a part of the communications circuits extending from the base stations to the mobile exchange office and the coder-decoder units in the same office. Consequently, the total number of coder-decoder units is reduced to a number which is smaller than the total number of base stations and which corresponds to the volume of traffic of the entire system. Further, when a communication channel is prepared at the time of a call origination or hand-over, since the setting of a communication channel is completed after synchronization is established between a base station and a coder-decoder unit, interruptions of the service are prevented at an initial stage of setting of a communication channel.

REFERENCES:
patent: 5119375 (1992-06-01), Paneth et al.
GSM Recommendation 08.52, "Base Station Controller (BSC) to Base Transceiver Station (BTS) Interface Principles", Version 3.0.1, pp. 1-15, (1989).
GSM Recommendation 08.60, "Inband Control of Remote Transcoders and Rate Adaptors", Version 3.2.0, pp. 1-29, (1990).

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