Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Patent
1996-04-01
1998-06-09
Olms, Douglas W.
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
370347, 370478, H04B 7212, H04Q 732
Patent
active
057646325
ABSTRACT:
A wireless user terminal (10), such as a cellular telephone, is of a type that receives a forward digital control channel that is comprised of a plurality of continuously transmitted frames, comprised of time slots, which are logically organized into Superframes contained within Hyperframes. A method includes the steps of (a) receiving and storing a first SPACH slot from a first Hyperframe; (b) receiving and storing at least a F-BCCH slot from a second, next Hyperframe; (c) receiving a second SPACH slot from the second, next Hyperframe; (d) decoding the stored first SPACH slot and the second SPACH slot and calculating a CRC of each decoded SPACH slot using DVCC information contained within the received F-BCCH slot; and (e) comparing a state of a BCN flag in the first SPACH slot to the state of the BCN flag in the second SPACH slot and, if they are equal, declaring that the received and stored F-BCCH slot is valid.
REFERENCES:
patent: 5276691 (1994-01-01), Kivari
patent: 5404355 (1995-04-01), Raith
patent: 5606548 (1997-02-01), Vayrynen
patent: 5625629 (1997-04-01), Wenk
Nokia Mobile Phones Limited
Olms Douglas W.
Phillips Matthew C.
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