Technique for Terminating Call Set Up in a CSFB Situation
First Claim
Patent Images
1. A method of controlling set up of a terminating call to a User Equipment, UE, in a Circuit Switched Fallback, CSFB, situation involving a first Mobile Switching Center, MSC, paging the UE and a second MSC where the UE is performing a Location Update, the method being performed by the first MSC and comprising:
- receiving, from a Home Location Register, HLR, a Provide Roaming Number, PRN, message;
receiving, from a Gateway MSC, GMSC, a call set up request message;
receiving a notification message from the second MSC, the notification message triggering an enhanced Roaming Retry procedure to the first MSC;
forwarding information received in the PRN message towards the second MSC; and
forwarding the call set up request message towards the second MSC.
1 Assignment
0 Petitions
Accused Products
Abstract
A technique for controlling set up of a terminating call to a UE in a CSFB situation involving a first MSC paging the UE and a second MSC where the UE is performing a Location Update is described. A method implementation of this technique comprises receiving, from an HLR, a PRN message and forwarding information received in the PRN message to the second MSC.
-
Citations
21 Claims
-
1. A method of controlling set up of a terminating call to a User Equipment, UE, in a Circuit Switched Fallback, CSFB, situation involving a first Mobile Switching Center, MSC, paging the UE and a second MSC where the UE is performing a Location Update, the method being performed by the first MSC and comprising:
-
receiving, from a Home Location Register, HLR, a Provide Roaming Number, PRN, message; receiving, from a Gateway MSC, GMSC, a call set up request message; receiving a notification message from the second MSC, the notification message triggering an enhanced Roaming Retry procedure to the first MSC; forwarding information received in the PRN message towards the second MSC; and forwarding the call set up request message towards the second MSC. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of handling set up of a terminating call to a User Equipment, UE, in a Circuit Switched Fallback, CSFB, situation involving a first Mobile Switching Center, MSC, paging the UE and a second MSC where the UE is performing a Location Update, the method being performed by the second MSC and comprising:
-
triggering an enhanced Roaming Retry procedure to the first MSC; receiving, from the first MSC, Provide Roaming Number, PRN, information; receiving, from the first MSC, a call set up request message; and handling call setup to the UE in accordance with the PRN information. - View Dependent Claims (15, 16, 17, 18, 19)
-
- 12. The method of claim 12, further comprising receiving a Location Update message from the UE.
-
20. A Mobile Switching Center, MSC, for controlling set up of a terminating call to a User Equipment, UE, in a Circuit Switched Fallback, CSFB, situation involving another MSC adapted to perform a Location Update procedure with the UE, the MSC being adapted to page the UE and comprising:
-
a receiving component adapted to; receive, from a Home Location Register, HLR, a Provide Roaming Number, PRN, message, receive, from a Gateway MSC, GMSC, a call set up request message, receive a notification message from the second MSC, the notification message triggering an enhanced Roaming Retry procedure to the first MSC; and a forwarding component adapted to; forward information received in the PRN message towards the other MSC, and forward the call set up request message towards the second MSC.
-
-
21. A Mobile Switching Center, MSC, for handling set up of a terminating call to a User Equipment, UE, in a Circuit Switched Fallback, CSFB, situation involving another MSC paging the UE, the MSC being adapted to perform a Location Update procedure with the UE and comprising:
-
a triggering component adapted to trigger an enhanced Roaming Retry procedure to the first MSC; a receiving component adapted to receive, from the other MSC, Provide Roaming Number, PRN, information and further adapted to receive, from the other MSC, a call set up request message; and a handling component adapted to handle call set up to the UE in accordance with the PRN information.
-
Specification