Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2011-04-26
2011-04-26
Edouard, Patrick N (Department: 2617)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S515000, C455S464000, C455S452200, C455S450000, C455S509000, C455S511000, C455S512000, C455S519000, C370S329000
Reexamination Certificate
active
07933620
ABSTRACT:
A method, system, and device are provided for transmit channel request messaging in wireless half-duplex voice communication systems. A new transmit channel request message (TCRM) is provided and sent over a logical control channel from a receiving device capable of walkie-talkie-like functionality, during an active half-duplex session, to a transmitting device capable of walkie-talkie-like functionality, indicating that the transmit channel is requested. In some embodiments, the invention provides for the display of information on the transmitting device user interface (UI) indicating, during an active session, that another user wishes to talk. The TCRM includes an indication that another device has requested the transmit channel and preferably includes an identification of the device which sent the transmit channel request message. In some embodiments, a qualifier flag in the TCRM is used to specify what, if any, extended functionality in respect of the TCRM is to be performed.
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Rao Padakandla Krishna
Yau Sing Janus
Edouard Patrick N
Heiber Shantell
Research In Motion Limited
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