US 7,321,771 B2 | ||
Control method capable of reducing call dropped rate of mobile station in wireless communication system, control circuit and mobile station thereof | ||
Chun-Hsiung Lin, Taipei (Taiwan); and Sung-Yao Lin, Taipei (Taiwan) | ||
Assigned to Mediatek Incorporation, Hsin-Chu Hsien (Taiwan) | ||
Filed on Nov. 29, 2004, as Appl. No. 10/904,776. | ||
Claims priority of application No. 92134476 A (TW), filed on Dec. 05, 2003; and application No. 93123275 A (TW), filed on Aug. 03, 2004. | ||
Prior Publication US 2005/0124349 A1, Jun. 09, 2005 | ||
Int. Cl. H04Q 7/20 (2006.01) |
U.S. Cl. 455—450 [455/437; 455/425; 455/449] | 34 Claims |
1. A control method capable of reducing a call dropped rate of a mobile station in a wireless communication system, the control
method comprising:
monitoring receiving power levels of a plurality of neighbor cells of the wireless communication system according to an information
of a serving cell of the wireless communication system;
the mobile station reconfirming the synchronization of the mobile station with respect to the BCCHs of neighbor cells having
known BSICs in response to Base Station Identification Codes (BSICs) of the six neighbor cells corresponding to the six strongest
receiving power levels being known; and
entering a second priority mode for performing frequency correction and synchronization of the mobile station with respect
to at least one neighbor cell's Broadcast Control Channel (BCCH) to decode the at least one neighbor cell's BSIC only when
the mobile station reconfirming the synchronization of the mobile station with respect to the BCCHs of neighbor cells having
known BSICs is completed, wherein the at least one neighbor cell corresponds to at least one receiving power level other than
the six strongest ones.
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