Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2005-02-15
2005-02-15
Duong, Frank (Department: 2666)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S342000, C370S350000, C370S503000, C455S442000
Reexamination Certificate
active
06856611
ABSTRACT:
Various techniques are disclosed for unambiguously determining and tracking frame offset in asynchronous wireless communication user equipment. The user equipment determines the unambiguous connection frame number of a downlink channel. The equipment then determines frame timing information for neighbor cells. The frame timing information for the primary common control physical channel and uplink dedicated physical channels is determined. The frame timing is determined as a coarse resolution frame offset in conjunction with a fine resolution chip offset. The frame numbering information for the uplink and downlink dedicated physical channels and the primary common control physical channel is also determined. Then the frame number and timing information is updated using a counter accurate to one chip resolution. The frame offset is updated if the number of chips underflows or overflows a predetermined window. Frame timing may be updated by updating only the fine chip offset or may be completely determined.
REFERENCES:
patent: 5828659 (1998-10-01), Teder et al.
patent: 6539004 (2003-03-01), Sawyer
patent: 6584087 (2003-06-01), Czaja et al.
patent: 6788959 (2004-09-01), Jokinen et al.
Universal Mobile Telecommunications System; Synchronization in Utran Stage 2, Jun. 2001, pp. 1-44, XP002189086.
Wheatley C: Self-Synchronizing a CDMA Cellular Network:, Microwave Journal, Horizon House, Dedham, US., vol. 42, No. 5, May 1999, p. 320, 322, 324, 326, 328, XP000913206.
Chaudhuri Siddhartha Ray
Emani Chalapathi Rao
Hsu Chih-Ping
Lin Jeremy H.
Singh Gurdeep
Brown Charles D.
Duong Frank
Jagannathan Melanie
Poppas George C.
Qualcomm Incorporated
LandOfFree
Radio interface synchronization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radio interface synchronization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio interface synchronization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3486733