Method for cell locking in a wireless communication device

• US 20060063530A1
• Filed: 08/16/2005
• Published: 03/23/2006
• Est. Priority Date: 09/08/2004
• Status: Abandoned Application

• Current Assignee: Spreadtrum Communications USA
• Original Assignee: Spreadtrum Communications USA
• Inventors: Niu, Yongwei
• Application Number:
  US11/205,359
• Publication Number:
  US 20060063530A1
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

A method is provided for fixing the use of a wireless communication device in certain cell areas. The method comprises: determining the predetermined number of strongest cells and checking each of the cells in descending order of received signal level to determine whether this cell belongs to one of the operator-permitted cells. If not, the signal strength of this cell is set to zero. The checking process continues until an operator-permitted cell is found, at which point the wireless terminal marks this cell as the serving cell. If after the completion of the checking of all of the cells without finding a suitable cell, the wireless terminal enters a limited service state.

Claims

1. A method for cell locking in a wireless device comprising:

(a) determining a predetermined number of cells that the wireless device receives a signal from;

(b) determining which of said predetermined number of cells is an operator-permitted cell; and

(c) determining from said operator-permitted cells of step (b) which has the strongest signal and having the wireless device lock onto that cell.

2. The method of claim 1 wherein if there are no operator-permitted cells detected, causing said wireless device to enter into a limited service state.

3. The method of claim 1 wherein said limited service state is a no service state.

4. A method for cell locking in a wireless device comprising:

(a) determining a predetermined number of cells that the wireless device receives a signal from;

(b) in descending order of signal strength of said predetermined number of cells, determining if said cell is an operator-permitted cell; and

(i) if not, marking said cell as disqualified and checking the next cell; and

(ii) if yes, marking said cell as the selected cell for said wireless device.

5. The method of claim 4 wherein if there are no operator-permitted cells detected, causing said wireless device to enter into a limited service state.

6. The method of claim 4 wherein said limited service state is a no service state.