Uplink frame at the transcoder rate adaptation unit/base...

Details Uplink frame at the transcoder rate adaptation unit/base... Uplink frame at the transcoder rate adaptation unit/base...

1995-07-06

2008-12-02

Abelson, Ronald (Department: 2619)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S345000, C370S442000, C370S458000

Reexamination Certificate

active

07460562

ABSTRACT:
An uplink transmission frame transmitted from a base transceiver station to a transcoder rate adaptation unit in a cellular mobile radio network includes in the conventional way an information area in the form of at least one data field and at least one control field, the latter including a subfield representative of the validity of data transmitted in the at least one data field. This subfield is substantially at the start of the information area. This frame structure prevents transmission of invalid speech signals during a call from the cellular network to a fixed network such as the public switched telephone network at the time of handover affecting a mobile station involved in the call.

REFERENCES:
patent: 5260987 (1993-11-01), Mauger
patent: 5430774 (1995-07-01), Dupuy
patent: 5436900 (1995-07-01), Hammar et al.
patent: 5438569 (1995-08-01), Kapadia et al.
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patent: 5475686 (1995-12-01), Bach et al.
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GSM Recommendation 08.60 Version 3.1.0, Jun. 1989.
Mouly et al, “The GSM System foro Mobile Communications”, 1992,Europe Media, Lassay-Les Chateaux, France.

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