Radio communication terminal unit and method of transmitting base station identification number

• US 20030022674A1
• Filed: 07/08/2002
• Published: 01/30/2003
• Est. Priority Date: 07/26/2001
• Status: Active Grant

• Current Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Original Assignee: DENSO Corporation
• Inventors: Hayashida, Atsushi, Shintai, Tatsuya
• Granted Patent: US 7,047,024 B2
• Time in Patent Office: Days
• US Class Current: 455/456.1
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 52/0254 detecting a user operation or a tactile contact or a motion of the device
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A cellular phone unit, upon turning from a standby mode to a data communication mode, responds to a user'"'"'s instruction of location positioning to turn from the data communication mode to the dormant mode, receives again base station identification numbers from several base stations through a paging channel, and designates again one of the base stations with the received identification numbers as the base station of primary communication with the phone unit. The phone unit can send the identification number of the proper base station of primary communication to a location information server even in case the phone unit is instructed by the user to commence the location positioning after it has moved from the location where it had commenced the data communication.

Claims

1. A radio communication terminal unit comprising:

a radio communication means which receives base station identification numbers from base stations through a paging channel; and

a control means which designates one of the base stations with the received identification numbers as a base station of primary communication,

wherein the control means, upon receiving an instruction of location positioning after the radio communication means has turned from the standby mode to the data communication mode, operates on the radio communication means to turn from the data communication mode to the dormant mode and receive again base station identification numbers from the base stations through the paging channel, designates again one of the base stations with the received identification numbers as the base station of primary communication, and operates on the radio communication means to send the base station identification number of the designated base station to a location information server.

2. The radio communication terminal unit according to claim 1, wherein the control means operates on the radio communication means to turn from the data communication mode to the dormant mode on condition that a prescribed time length has expired after the radio communication means had turned from the standby mode to the data communication mode.

3. The radio communication terminal unit according to claim 1, wherein the control means compares between the number of neighboring base stations of the base station of primary communication with the terminal unit immediately after the radio communication means has turned from the standby mode to the data communication mode and the number of neighboring base stations of the base station of primary communication with the terminal unit immediately after the terminal unit has received the instruction of location positioning, and operates on the radio communication means to turn from the data communication mode to the dormant mode on condition that the difference in terms of the numbers of base stations compared is in excess of a prescribed number.

13. The radio communication terminal unit according to claim 1, wherein the position information server determines an approximate position of the terminal unit based on the received base station identification number upon receiving the base station identification number from the radio communication means, and sends assist information related to the approximate position of the terminal unit.

14. The radio communication terminal unit according to claim 13, wherein the assist information includes a list of satellites of a global positioning system which can be accessible from a specified position.

15. The radio communication terminal unit according to claim 14, wherein the terminal unit makes access to the satellites based on received assist information upon receiving the list of satellites from the location information server.

4. A computer program which is run by a radio communication terminal unit to carry out:

a process of operating on a radio communication means to turn from a data communication mode to a dormant mode, upon receiving an instruction of location positioning after the radio communication means has turned from a standby mode to the data communication mode;

a process of operating on the radio communication means to receive again base station identification numbers from base stations through a paging channel;

a process of designating one of the base stations with the received identification numbers as a base station of primary communication with the terminal unit; and

a process of operating on the radio communication means to send the identification number of the designated base station to a location information server.

5. A method of transmitting a base station identification number from a radio communication terminal unit, the method comprising steps of:

turning a radio communication means from a data communication mode to a dormant mode upon receiving an instruction of location positioning after the radio communication means of the terminal unit has turned from a standby mode to the data communication mode;

receiving base station identification numbers from base stations through a paging channel by the radio communication means;

designating again one of the base stations with the received identification numbers as a base station of primary communication with the terminal unit; and

sending the identification number of the designated base station from the radio communication means to a location information server.

6. A radio communication terminal unit comprising:

a radio communication means which receives base station identification numbers from base stations through a paging channel; and

a control means which designates one of the base stations with the received identification numbers as a base station of primary communication with the terminal unit,

wherein the control means, upon receiving an instruction of location positioning after the radio communication means has turned from a standby mode to a data communication mode, and operates on the radio communication means to receive through a traffic channel the base station identification number from a base station of primary communication with the terminal unit and send the received identification number to a location information server.

7. A computer program which is run by a radio communication terminal unit to carry out:

a process of operating on a radio communication means to receive through a traffic channel a base station identification number from a base station of primary communication with the terminal unit, upon receiving the instruction of location positioning after the radio communication means of the terminal unit has turned from the standby mode to the data communication mode; and

a process of operating on the radio communication means to send the received identification number to a location information server.

8. A method of transmitting a base station identification number from a radio communication terminal unit, the method comprising steps of:

receiving through a traffic channel by a radio communication means a base station identification number from a base station of primary communication with the terminal unit upon receiving an instruction of location positioning after the radio communication means of the terminal unit has turned from a standby mode to a data communication mode; and

sending the received identification number from the radio communication means to a location information server.

9. A radio communication terminal unit comprising:

a first radio communication means which receives base station identification numbers from base stations through a paging channel; and

a control means which designates one of the base stations with the received identification numbers as a base station of primary communication with the terminal unit,

wherein the terminal unit includes a second radio communication means, and

wherein the control means, upon receiving an instruction of location positioning after the first radio communication means has turned from a standby mode to a data communication mode, operates on the second radio communication means to receive again base station identification numbers from the base stations through the paging channel, designates one of the base stations with the received identification numbers as the base station of primary communication with the terminal unit, and operating on the second radio communication means to send the identification number of the designated base station to a location information server.

10. A computer program which is run by a radio communication terminal unit to carry out:

a process of, upon receiving an instruction of location positioning after a radio communication means of the terminal unit has turned from a standby mode to a data communication mode, operating on another radio communication means of the terminal unit to receive again base station identification numbers from base stations through a paging channel;

a process of designating again one of the base stations with the received identification numbers as a base station of primary communication with the terminal unit; and

a process of operating on the another radio communication means to send the base station identification number of the designated base station to a location information server.

11. A method of transmitting a base station identification number from a radio communication terminal unit, the method comprising steps of:

receiving again base station identification numbers from base stations through a paging channel by another radio communication means of the terminal unit upon receiving an instruction of location positioning after a radio communication means of the terminal unit has turned from a standby mode to a data communication mode;

designating again one of the base stations with the received identification numbers as a base station of primary communication with the terminal unit; and

sending the identification number of the designated base station from the another radio communication means to a location information server.

12. A method of transmitting a base station identification number from a radio communication terminal unit to a location information server, the method comprising steps of:

sending a terminal unit identification number of the terminal unit, which is received from the terminal unit, to a base station control facility; and

sending the base station identification number of a base station of primary communication with the terminal unit to the location information server in accordance with the terminal unit identification number received from the terminal unit.