Apparatus and a method for controlling a priority access and channel assignment call in a mobile telecommunication system

• US 20040219939A1
• Filed: 05/24/2004
• Published: 11/04/2004
• Est. Priority Date: 06/01/2000
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Seon, Yong-Moon
• Granted Patent: US 7,221,941 B2
• Time in Patent Office: Days
• US Class Current: 455/509
• CPC Class Codes: H04M 15/8235 Access based
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

Disclosed is a method for controlling a PACA call in a mobile telecommunications system, which comprises: sending a new origination message from a mobile station in a PACA state to a base station; sending a service request message for a PACA call from the base station to a mobile switching center, requesting from the mobile switching center the base station to assign a traffic channel to the mobile station; assigning an available traffic channel to the mobile station to start a communication; and distinguishing the PACA call service from an ordinary call service.

Claims

1. A method for controlling a priority access and channel assignment (PACA) call in a mobile telecommunication system, the method comprising:

sending a new origination message from a mobile station in a PACA state to a base station;

sending a service request message for the PACA call from the base station to a mobile switching center;

requesting from the mobile switching center that the base station assign a traffic channel to the mobile station;

assigning an available traffic channel to the mobile station to start a communication; and

distinguishing the PACA call service from an ordinary call service.

2. A method as defined in claim 1, wherein the new origination message includes a parameter for indicating that that the PACA call is requested again.

3. A method as defined in claim 1, wherein the available traffic channel is assigned to the mobile station to start a communication by the base station.

4. A method as defined in claim 1, wherein the PACA call service is distinguished from the ordinary call service by the mobile switching center.

5. A method for controlling a PACA call in a mobile telecommunication system, the method comprising:

determining whether or not an origination message from a mobile station for the PACA call has the same subscriber'"'"'s registered location as the subscriber'"'"'s registered location in a visitor location register (VLR);

determining that the mobile station has been handed off from a previous base station to a new base station if the subscriber'"'"'s registered location of the origination message is not the same as that of the VLR;

sending a first PACA call update message to the previous base station; and

deleting the first PACA call information from the previous base station.

6. A method as defined in claim 5, wherein the deleted first PACA call information is stored in a PACA call buffer of the previous base station.

7. A method as defined in claim 5, wherein the subscriber'"'"'s location registered in the VLR is registered when the mobile station is shifted to a PACA state after sending the origination message.

8. A method as defined in claim 5, wherein the origination message is determined as the PACA call by detecting a parameter representing the PACA call.

9. A method as defined in claim 8, further comprising:

determining whether the mobile station is in the PACA state or not, if the subscriber'"'"'s registered location of the origination message does not agree with that of the VLR;

determining whether a cell ID of the origination message agrees with the origination message registered in the VLR if the mobile station is in the PACA state;

determining that the mobile station has sent a new origination message in the PACA state if the cell ID of the origination message agrees with that registered in the VLR;

sending a second PACA call update message to the previous base station; and

deleting the second PACA call information from the previous base station.

10. A method as defined in claim 9, wherein the PACA call deleted from the base station is previously stored in the PACA call buffer of the base station.

11. A method for controlling a PACA call in a mobile telecommunication system, the method comprising:

sending a PACA call cancel message from a mobile station in a PACA state to a base station;

sending a PACA call update message from the base station to a mobile switching center; and

sending a mobile station PACA CALL update message from the mobile switching center to the VLR.

12. A method as defined in claim 11, further comprising deleting the PACA call update message from the mobile station.

13. A method for controlling a PACA call in a mobile telecommunication system, the method comprising:

analyzing information from a receiving subscriber toward which a call signal is directed; and

canceling the call signal when a mobile station of the receiving subscriber is in a PACA state.

14. A method as defined in claim 13, further comprising sending a busy tone to a sending subscriber who has generated the call signal.

15. A method as defined in claim 13, further comprising sending a call message to the mobile station of the receiving subscriber when it is not in the PACA state.

16. A system for controlling a priority access and channel assignment (PACA) call in a mobile telecommunication system, the system comprising:

a mobile station configured to send a new origination message in a PACA state to a base station;

the base station configured to send a service request message for the PACA call to a mobile switching center;

the mobile switching center configured to request the base station to assign a traffic channel to the mobile station;

the base station further configured to assign an available traffic channel to the mobile station to start a communication; and

the mobile switching center further configured to distinguish the PACA call from an ordinary call service.

17. An apparatus for controlling a priority access and channel assignment (PACA) call in a mobile telecommunication system, the apparatus comprising:

a mobile switching center configured to distinguish a PACA call from an ordinary call service.