Method and apparatus for synchronization in a wireless telephone

Details Method and apparatus for synchronization in a wireless telephone Method and apparatus for synchronization in a wireless telephone

1993-10-18

1995-01-24

Kuntz, Curtis

Telephonic communications

Audio message storage, retrieval, or synthesis

379 63, 379 59, 379 60, 455 331, H04M 1100

Patent

active

053848284

ABSTRACT:
A resynchronization method for use in a communication system, such as a second generation cordless telephone system 800, begins by determining that synchronization has been lost by a receiving unit (830). The receiving unit than mutes any transmit data and generates zero data which is combined with a pattern generated by pattern generator (812). The transmission is then received by handset (830), which detects the pattern generated by pattern generator (812) using pattern detector (850). Pattern detector (850) then generates a pattern detected signal (852) which causes handset (840) to also stop sending data and generate a pattern accompanied by zero data. Base station (830) detects the pattern and again generates another pattern accompanied with zero data which is transmitted to handset (840). Handset (840) after decoding the pattern for the second time begins to resumes the normal transmission of data to base station (830).

REFERENCES:
patent: 4876740 (1989-10-01), Levine et al.
patent: 5081679 (1992-01-01), Dert
patent: 5329635 (1994-07-01), Wadin et al.
ETSI discloses a CT2 Common Air Interface version 1.1, by European Telecommunications Standards Institute, France, Jun. 30, 1991, pp. 1-188.

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