METHOD AND APPARATUS FOR EFFICIENT SIGNALING AND USAGE OF RESOURCES FOR WIRELESS COMMUNICATIONS SUPPORTING CIRCUIT SWITCHED AND PACKET SWITCHED SESSIONS
First Claim
Patent Images
1. A method performed by a visitor location register (VLR) for avoiding an inter-system change for a wireless transmit/receive unit (WTRU) comprising:
- deciding to abort a mobile terminating (MT) circuit switched fallback (CSFB) to the WTRU;
determining if a paging request to start the MT CSFB call has been sent; and
on a condition that the paging request has been sent, sending an abort message to a mobility management entity (MME) requesting the MME to cancel the MT CSFB call.
2 Assignments
0 Petitions
Accused Products
Abstract
Method and apparatus efficiently signal and use resources for wireless communications supporting circuit switched (CS) and packet switched sessions (PS). Signaling and interaction between the wireless transmit/receive unit (WTRU), and various network entities, such as the Mobility Management Entity (MME), the Visitor Location Register (VLR), and Base Stations (BS), are used to implement circuit switched fall back (CSFB) in a PS system.
-
Citations
32 Claims
-
1. A method performed by a visitor location register (VLR) for avoiding an inter-system change for a wireless transmit/receive unit (WTRU) comprising:
-
deciding to abort a mobile terminating (MT) circuit switched fallback (CSFB) to the WTRU; determining if a paging request to start the MT CSFB call has been sent; and on a condition that the paging request has been sent, sending an abort message to a mobility management entity (MME) requesting the MME to cancel the MT CSFB call. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A visitor location register (VLR) configured to avoid an inter-system change for a wireless transmit/receive unit (WTRU) comprising:
-
the VLR configured to decide to abort a mobile terminating (MT) circuit switched fallback (CSFB) to the WTRU; the VLR configured to determine if a paging request to start the MT CSFB call has been sent; and on a condition that the paging request has been sent, the VLR configured to send an abort message to a mobility management entity (MME) requesting the MME to cancel the MT CSFB call. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A method performed by a Mobility Management Entity (MME) for avoiding an inter-system change for a wireless transmit/receive unit (WTRU) comprising:
-
receiving an abort message from a visitor location register (VLR) indicating to the MME to cancel a mobile terminating (MT) circuit switched fallback (CSFB) call to the WTRU; on a condition that the MME has already received an extended service request (ESR) from the WTRU, sending a service reject message to the WTRU indicating that the MT CSFB call is aborted; and sending no further messages to the WTRU. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A mobility management entity (MME) configured to avoid an inter-system change for a wireless transmit/receive unit (WTRU) comprising:
-
the MME configured to receive an abort message from a visitor location register (VLR) indicating to the MME to cancel a mobile terminating (MT) circuit switched fallback (CSFB) call to the WTRU; on a condition that the MME has already received an extended service request (ESR) from the WTRU, the MME configured to send a service reject message to the WTRU indicating that the MT CSFB call is aborted; and the MME configured to send no further messages to the WTRU. - View Dependent Claims (17, 18, 19, 20)
-
-
21. A method for synchronizing bearer contexts between a transmitter entity and a receiver entity in wireless communications comprising:
-
detecting an update in a status of a bearer context in a transmitter entity; including a bearer context status information element (IE) in a next non-access stratum (NAS) message to the receiver entity, wherein the bearer context status IE is based on the update in the status of the bearer context; and sending the next NAS message to the receiver entity. - View Dependent Claims (22, 23, 24, 25, 26)
-
-
27. A transmitter entity configured to synchronize bearer contexts between with a receiver entity in wireless communications comprising:
-
a processor configured to detect an update in a status of a bearer context in a transmitter entity; the processor configured to include a bearer context status information element (IE) in a next non-access stratum (NAS) message to the receiver entity, wherein the bearer context status IE is based on the update in the status of the bearer context; and a transmitter configured to send the next NAS message to the receiver entity. - View Dependent Claims (28, 29, 30, 31, 32)
-
Specification