Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2011-08-30
2011-08-30
Urban, Edward (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C375S356000, C375S357000
Reexamination Certificate
active
08010138
ABSTRACT:
A host base transceiver station BTS derives a reference timing signal from a physical layer training signal (such as a preamble) received from a neighbor network node/BTS. Downlink transmissions are then synchronized to the derived reference timing signal. This may be used as a holdover timing mode, such as when the host BTS determines that synchronization from a primary source is no longer reliable. In an embodiment, a reference oscillator of the host BTS is phase locked to the derived reference timing signal. Variations include one or multiple such training signals from one or multiple neighbor BTSs, selecting one BTS when the primary synchronization mechanism fails for several BTSs in the same area, and how to phase lock the oscillator without dithering about the target frequency. Apparatus and computer programs are also detailed.
REFERENCES:
patent: 5537685 (1996-07-01), Matsuno
patent: 5784368 (1998-07-01), Weigand et al.
patent: 6493539 (2002-12-01), Falco et al.
patent: 7110725 (2006-09-01), Kent
patent: 2002/0054611 (2002-05-01), Seta
patent: 2003/0203745 (2003-10-01), Chiang et al.
patent: 2006/0061501 (2006-03-01), Sheng et al.
patent: 2007/0177605 (2007-08-01), Benco et al.
patent: 1 393 473 (2004-03-01), None
patent: WO-94/28643 (1994-12-01), None
“Autonomous inter base station synchronization via a common broadcast control channel” Vehicular Technology Conference, 1994 IEEE 44thStockholm, Sweden Jun. 8-10, 1994, New York NY ISA, IEEE, Jun. 8, 1994, pp. 1050-1054, XP010123236 ISBN.
“Network Synchronisation for UTRA TDD”, A.P. Hulbert et al., IEEE 2001, pp. 2804-2807.
“TDD Synchronisation”, TSG-RAN Working Group4 meeting #3 , Tokyo, Japan Mar. 29-31, 1999, 5 pgs.
“Draft LS about TDD Synchronisation Methods”, TSG-RAN working Group 3, meeting #6, Sophia Antipolis, France, Aug. 23-27, 1999, 7 pgs.
“Technical Specification Group Radio Access Netowrk; Synchronisation in UTRAN Stage 2 (Release 7)”, 3GPP TS 25.402 V7.0.0 (Mar. 2006), pp. 1-48.
Harrington & Smith
Nokia Corporation
Sorowar Golam
Urban Edward
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