Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2005-08-09
2005-08-09
Nguyen, Lee (Department: 2682)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S063100, C455S067110, C370S447000
Reexamination Certificate
active
06928303
ABSTRACT:
Methods and apparatus for combined wireless telephony and data communication of the present invention include providing a Home RF transceiver and a WDCT transceiver in a common enclosure and synchronizing the operation of the Home RF transceiver to specific time slots in the WDCT TDM frame. More particularly, the Home RF transceiver is prevented from transmitting whenever the WDCT transceiver is receiving and is prevented from receiving whenever the WDCT transceiver is transmitting. This effectively prevents the Home RF transceiver from interfering with the WDCT transceiver and vice versa. According to a presently preferred embodiment, synchronization is keyed to the repeating WDCT TDM frame but is dynamically adjustable based on the actual use of bandwidth by the WDCT devices. Thus, when there is no telephony traffic, the Home RF transceiver has full bandwidth. For each WDCT telephone call in progress, no more than 1/12 of the Home RF transceiver bandwidth is sacrificed. The methods and apparatus of the invention allow the reuse of key components from existing standards to provide a combined voice and data base station. The invention also takes advantage of two proven technologies to achieve its goals.
REFERENCES:
patent: 5515374 (1996-05-01), Atkinson
patent: 2002/0061031 (2002-05-01), Sugar et al.
Steinbach Holger
Sydon Uwe
Nguyen Lee
Siemens Communications Inc.
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