Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate
2001-04-26
2008-08-05
Pham, Chi H. (Department: 2616)
Multiplex communications
Communication over free space
Combining or distributing information via time channels
C455S502000, C455S503000, C375S355000, C375S357000
Reexamination Certificate
active
07408916
ABSTRACT:
The invention concerns a method for synchronising clocks of base transceiver stations in a telecommunications system and a mobile communications system. According to the invention, in either some or in all base station sites of the telecommunications network a location measurement unit is installed, which receives an accurate clock including an extra-system signal. The clock information is transmitted further to base transceiver stations, whose frame transmissions are synchronised in accordance with the clock information. By using the implementation in accordance with the invention both economic and functional advantages are achieved, e.g. the capacity can be increased by up to 50-300%, depending on the manner of implementation.
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GSM 08.31 V7.0.1 (Jan. 2000) Digital Cellular Telecommunications System (Phase 2+); Location Services (LCS); Serving Mobile Location Centre—Serving Mobile Location Centre—Serving Mobile Location Centre (SMLC-SMLC); SMLCPP specification (GSM 08.31 version 7.0.1 Release 1998), p. 6.
Finnish Search Report.
Annala Heikki
Kassinen Juha P.
Melero Juan
Niemela Kari
Parkkinen Jari
Chou Albert T
Nokia Corporation
Pham Chi H.
Squire Sanders & Dempsey L.L.P.
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