Push-to-talk handling in a dual processor environment

Details Push-to-talk handling in a dual processor environment Push-to-talk handling in a dual processor environment

2007-06-12

2007-06-12

Urban, Edward (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S517000, C455S502000, C455S552100

Reexamination Certificate

active

10728189

ABSTRACT:
In a push-to-talk device having two processors where one of said processors is a radio chip and one of said processors is a microprocessor, a method and apparatus for synchronizing said microprocessor and said radio chip comprising the steps of: checking the status of a radio push-to-talk key on said radio chip when a user push-to-talk button is turned on or off on said microprocessor; if said user push-to-talk button is on and said radio push-to-talk key is off, performing the steps of: sending a command to said radio chip to turn on said radio push-to-talk key; and waiting for a response from said radio chip, and if said response indicates said radio push-to-talk key is on, remaining in this synchronized state, otherwise repeating said sending and waiting steps; if said user button is off and said radio push-to-talk key is on, performing the steps of: sending a command to said radio chip to turn off said radio push-to-talk key; and waiting for a response from said radio chip, and if said response indicates said radio push-to-talk key is off, remaining in this synchronized state, otherwise repeating said sending and waiting steps; if said user push-to-talk button is off and said radio push-to-talk key is off, remaining in this synchronized state; and if said user push-to-talk button is on and said radio push-to-talk key is on, remaining in this synchronized state.

REFERENCES:
patent: 4328581 (1982-05-01), Harmon et al.
patent: 6522894 (2003-02-01), Schmidt
patent: 6871144 (2005-03-01), Lee
patent: 2006/0114314 (2006-06-01), Dunko
Product Information Sheet:Remote Control, 4 pages, www.my-symbian.com/uiq/applications.php?faq=6&fldAuto=8; ©2002 My-Sybian.com.
Product Information Sheet:Remote P800—Remote P900, 3 pages, www.my-symbian.com/uiq/applications/applications.php?faq=2&fldAuto=248; ©2002 My Symbian.com.

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