Cell search method in UMTS

Details Cell search method in UMTS Cell search method in UMTS

2008-01-29

2008-01-29

Nguyen, Brian (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S335000

Reexamination Certificate

active

07324479

ABSTRACT:
A cell search method in an asynchronous mobile communication system. For cell search, a UE searches signals received from Node Bs in a slot synchronization step, calculates the timing offset of each of the Node Bs by comparing signals having slot peaks higher than a first threshold with each other among the searched signals in a frame synchronization and code group identification step, and detects the timing offsets of neighbor Node Bs by comparing the timing offsets of signals higher than a second threshold with each other in a code identification step. In addition, Node Bs that transmit signals higher than the second threshold in the code identification step are included in a candidate set and are subject to a cell search periodically.

REFERENCES:
patent: 6526039 (2003-02-01), Dahlman et al.
patent: 6744747 (2004-06-01), Shiu et al.
patent: 6775242 (2004-08-01), Grilli et al.
patent: 2003/0036384 (2003-02-01), Chen et al.

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