Cell Locking Method for Mobile Terminal and Mobile Terminal Capable of Locking Cell

• US 20120202463A1
• Filed: 08/25/2010
• Published: 08/09/2012
• Est. Priority Date: 10/23/2009
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Wang, Yanping, Zuo, Yanqiang, Feng, Hu
• Granted Patent: US 8,825,010 B2
• Time in Patent Office: Days
• US Class Current: 455/411
• CPC Class Codes: H04W 48/20 Selecting an access point

Abstract

A cell locking method for a mobile terminal and a mobile terminal capable of locking a cell are disclosed in the present invention. The method includes: the mobile terminal acquiring a system identification (SID), a network identification (NID), a base station identifier (BASE ID) and a pseudo-random number (PN) of a current cell; judging whether the SID, NID, BASE ID and PN are already stored in a database of the mobile terminal, if yes, then setting the mobile terminal to a normal status; judging whether the SID, the NID, and the PN are already stored in the database of the mobile terminal and the database is not full, or whether the BASE ID and PN are already stored in the database of the mobile terminal, if yes, then transferring to D; and D. writing the SID, NID, BASE ID and PN into the database of the mobile terminal.

Claims

1. A cell locking method for a mobile terminal, wherein said method comprises:

step A. the mobile terminal searching a cell at a current location to acquire a system identification (SID), a network identification (NID), a base station identifier (BASE ID) and a pseudo-random number (PN) of said cell;

step B. judging whether said SID, said NID, said BASE ID and said PN are already stored in a database of said mobile terminal, if yes, then setting said mobile terminal to a normal status and transferring to step E, otherwise transferring to step C ;

step C. judging whether said SID, said NID, and said PN are already stored in the database of said mobile terminal and said database is not full, or said BASE ID and said PN are already stored in the database of said mobile terminal, if yes, then transferring to step D, otherwise setting said mobile terminal to a lock status and transferring to step E;

step D. writing said SID, said NID, said BASE ID and said PN into the database of said mobile terminal and setting said mobile terminal into a normal status and transferring to step E; and

step E. finishing lock procedure.

2. The cell locking method for a mobile terminal according to claim 1, wherein before step A, the method further comprises an initialization procedure, and said initialization procedure comprises:

setting a number N of limited dials;

limiting a maximum number of BASE IDs simultaneously supported by a user terminal;

said user terminal, after a user acquiring the user terminal dials a (N+1)th non-emergent number, acquiring and storing said SID, said NID, said BASE ID and said PN in a system parameter message and a PN sequence set stored in said user terminal according to a current network signaling.

3. The cell locking method for a mobile terminal according to claim 2, wherein said PN sequence set comprises an active set, a candidate set and a neighbor set.

4. The cell locking method for a mobile terminal according to claim 1, wherein after the mobile terminal is set to the lock status, the method further comprises an unlock procedure F, and said F comprises:

step F1. an operator determining whether identity and requirement of said user is legal according to a cell unlock request of the user, if yes, then transferring to step F2, otherwise ending;

step F2. the operator sending an unlock instruction or unlock short message to the user terminal;

step F3. after receiving said unlock instruction or said unlock short message, the user terminal emptying the SID, NID, BASE ID and PN stored in said database and resetting locked cell configuration.

5. The cell locking method for a mobile terminal according to claim 4, wherein when the cell unlock request of said user is sent to the operator by dialing a specified service number, the operator sends said unlock short message to the user terminal.

6. The cell locking method for a mobile terminal according to claim 4, wherein when the cell unlock request of said user is sent to the operator by sending said user terminal to the operator, the operator sends said unlock instruction to the user terminal by using a tool.

7. The cell locking method for a mobile terminal according to claim 1, wherein when setting the mobile terminal to the lock status, the method further comprises:

if said user terminal responds or initiates a service connection, then forbidding said user terminal to access or to respond to the system and sending back a specified error code to the system.

12. The cell locking method for a mobile terminal according to claim 2, wherein when setting the mobile terminal to the lock status, the method further comprises:

if said user terminal responds or initiates a service connection, then forbidding said user terminal to access or to respond to the system and sending back a specified error code to the system.

13. The cell locking method for a mobile terminal according to claim 3, wherein when setting the mobile terminal to the lock status, the method further comprises:

if said user terminal responds or initiates a service connection, then forbidding said user terminal to access or to respond to the system and sending back a specified error code to the system.

14. The cell locking method for a mobile terminal according to claim 4, wherein when setting the mobile terminal to the lock status, the method further comprises:

if said user terminal responds or initiates a service connection, then forbidding said user terminal to access or to respond to the system and sending back a specified error code to the system.

15. The cell locking method for a mobile terminal according to claim 5, wherein when setting the mobile terminal to the lock status, the method further comprises:

if said user terminal responds or initiates a service connection, then forbidding said user terminal to access or to respond to the system and sending back a specified error code to the system.

16. The cell locking method for a mobile terminal according to claim 6, wherein when setting the mobile terminal to the lock status, the method further comprises:

if said user terminal responds or initiates a service connection, then forbidding said user terminal to access or to respond to the system and sending back a specified error code to the system.

8. A mobile terminal capable of locking a cell, wherein said mobile terminal comprises a current cell parameter acquisition unit, a data storage unit, a parameter comparison unit, a database writing-in unit and a status setting unit, wherein

the current cell parameter acquisition unit is used for acquiring a system identification (SID), a network identification (NID), a base station identifier (BASE ID) and a pseudo-random number (PN) of a current cell;

the data storage unit is used for storing a database of the mobile terminal, wherein, the database includes the SID, NID, BASE ID and PN parameters;

the parameter comparison unit is used for comparing the parameter acquired by the current cell parameter acquisition unit with the parameter stored in said data storage unit;

the database writing-in unit is used for writing data into said database according to comparison result of said parameter comparison unit;

the status setting unit is used for setting status of said mobile terminal according to the comparison result of said parameter comparison unit.

9. The mobile terminal according to claim 8, wherein said database writing unit is further used for writing said SID, said NID, said BASE ID and said PN acquired by said current cell parameter acquisition unit into the database of said mobile terminal when said comparison result is that said SID, said NID and said PN acquired by said current cell parameter acquisition unit are the same as the SID, NID and PN stored in said database and said database is not full, or when said BASE ID and said PN acquired by said current cell parameter acquisition unit are the same as the BASE ID and PN stored in said database.

10. The mobile terminal according to claim 8, wherein said status setting unit is further used for setting said mobile terminal to a normal status when said comparison result is that said SID, said NID, said BASE ID and said PN acquired by said current cell parameter acquisition unit are the same as the SID, NID, BASE ID and PN stored in said database, or when said SID, said NID and said PN acquired by said current cell parameter acquisition unit are the same as the SID, NID and PN stored in said database and said database is not full, or when said BASE ID and said PN acquired by said current cell parameter acquisition unit are the same as the BASE ID and PN stored in said database, otherwise, setting said mobile terminal to a lock status.

11. The mobile terminal according to claim 8, wherein said mobile terminal further comprises an unlock unit which is connected to said data storage unit and is used for emptying the SID, NID, BASE ID and PN in said database according to a received unlock instruction or unlock short message and resetting the locked cell configuration.