System and method for speed indication through transmit...

Details System and method for speed indication through transmit... System and method for speed indication through transmit...

2008-07-08

2008-07-08

Anderson, Matthew (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S069000, C455S441000

Reexamination Certificate

active

10506389

ABSTRACT:
Speed indication device (100) for determining a speed indication signal (410) indicating a speed of a wireless mobile telecommunication device (14) relative to the speed indication device (100), wherein the speed indication device (100) determines the speed indication signal (410) from a sequence of transmit power control commands sent by the wireless mobile telecommunication device (14) to an access point (12) in a wireless telecommunication device (14) to an access point (12) in a wireless telecommunication network for controlling, in use, a transmit power of a radio signal transmitted by the access point (12) to the wireless mobile telecommunication device (14). If the relative speed is found to be above a threshold, the speed may be calculated using a measurement of the Doppler frequency.

REFERENCES:
patent: 5924043 (1999-07-01), Takano
patent: 6249682 (2001-06-01), Kubo et al.
patent: WO 0131824 (2001-05-01), None
patent: WO 0141335 (2001-06-01), None
patent: WO 0199303 (2001-12-01), None
Eropean Patent Office, International Search Report for PCT/NL02/00156, dated Nov. 7, 2002.

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