Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1997-07-29
2000-03-14
Pham, Chi H.
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
370337, 375202, H04B 7212, H04B 1500, H04J 312
Patent
active
060382384
ABSTRACT:
The object of the invention is a method to realize discontinuous transmission (DTX) in a telecommunications network, e.g. in a GSM (Global System for Mobile Communications) mobile phone network, particularly on the downlink. The disadvantage of known methods is that dummy bursts transmitted on the frequency of the broadcasting channel cause disturbing responses in a mobile phone, when frequency hopping is used. In the solution according to the invention the bursts transmitted on the frequency of the broadcasting channel are encoded so that after decoding the mobile phone prevents information contained in a dummy burst to be interpreted as speech. In this way the mobile phone responds with noise on the dummy bursts transmitted on the broadcasting frequency.
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Change Request, Technical Specification GSM 05.02, version 3.6.1, Dec. 12, 1994.
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British Telecom Technology Journal, vol. 8, No. 1, Jan. 1990, Hodges, "The GSM Radio Interface" p. 31-43.
Jokinen Harri
Pirila Hannu
Nokia Mobile Phones Limited
Pham Brenda H.
Pham Chi H.
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