Back to results
US 8,014,750 B2Granted
Reducing call setup delays from non-call related signaling
AssigneeStarent Networks Corporation
InventorsKaitki Agarwal, Rajat Ghai, Jim Towey
Life of this patent
Estimating the term…
Abstract
Methods and apparatus are provided for reducing call setup delays resulting from non-call related signaling. In session initiation protocol (SIP) messaging, SIP session setup messaging can have the same priority for placement on the airlink to a mobile phone as other non-call session setup messaging. Method and apparatus for providing priority to call session setup messaging are providing, and in some cases, emergency call setup messaging. By providing priority to call setup messaging, delays that might result from being stuck in a queue behind non-call setup messaging can be reduced.
Claims15
A chassis that facilitates network connectivity comprising:
- a proxy-call session control function (P-CSCF) residing on the chassis, the P-CSCF including a first queue with at least one session initiation protocol (SIP) message and at least one non-call related message waiting for airlink availability, a second queue reserved for call session setup messages for emergency calls, and a third queue reserved for non-call related messages, wherein the call session setup messages in the second queue are placed on the airlink prior to the at least one SIP message and the at least one non-call related message in the first queue and wherein the non-call related messages in the third queue wait for airlink availability until the at least one SIP message in the first queue and the call session setup messages in the second queue are placed on the airlink;
- and
- wherein the P-CSCF is configured to:
- receive a session initiation protocol (SIP) call session setup request message for an emergency call;
- send a SIP Invite message to set up an emergency call with a public service answering point (PSAP);
- receive a call session setup message in response to the call session setup request message;
- place the call session setup message in the first queue for the airlink ahead of the at least one SIP message and the at least one non-call related message waiting in the first queue;
- and
- if the first queue is congested,
- place the call session setup message in the second queue for the airlink;
- and
- place the at least one non-call related message in the first queue into the third queue.
9 more elements
A call session setup method comprising:
- receiving a session initiation protocol (SIP) call session setup request message for a priority call at a proxy-call session control function (P-CSCF), wherein the priority call has a priority that is higher than a priority for at least some other calls;
- sending a SIP Invite message from the P-CSCF to complete the call session request;
- receiving a call session setup message in response to the call session setup request message at the P-CSCF and checking the call session setup message;
- determining whether the call session setup message receives priority over other SIP messages and at least one non-call related message residing in a first queue for airlink availability;
- placing the call session setup message in the first queue for the airlink ahead of the other SIP messages and the at least one non-call related message residing in the first queue;
- if the first queue is congested,
- placing the call session setup message in a second queue for the airlink, wherein the second queue is reserved for call session setup messages for priority calls and the call session setup messages in the second queue are placed on the airlink prior to the other SIP messages and the at least one non-call related message in the first queue;
- and
- placing the at least one non-call related message in the first queue into a third queue, wherein the third queue is reserved for non-call related messages and the non-call messages in the third queue wait until the other SIP messages in the first queue and the call session setup messages in the second queue are placed on the airlink.
6 more elements
A chassis comprising:
- a proxy-call session control function (P-CSCF) residing on the chassis, the P-CSCF including a first queue with at least one session initiation protocol (SIP) message and at least one non-call related message waiting for airlink availability, a second queue reserved for call session setup messages for priority calls, and a third queue reserved for non-call related messages, wherein the call session setup messages in the second queue are placed on the airlink prior to the at least one SIP message and the at least one non-call related message in the first queue and wherein the non-call related messages in the third queue wait for airlink availability until the at least one SIP message in the first queue and the call session setup message in the second queue are placed on the airlink;
- and
- wherein the P-CSCF is configured to:
- receive a session initiation protocol (SIP) call session setup request message for a priority call;
- send an SIP Invite message to set up a priority call;
- receive a call session set up message in response to the call session setup request message;
- place the call session setup message in the first queue for the airlink ahead of the at least one SIP message and the at least one non-call related message waiting in the first queue;
- and
- if the first queue is congested,
- place the call session setup message in the second queue for the airlink;
- and
- place the at least one non-call related message in the first queue into the third queue.
9 more elements
Dependencies are inferred from the claim text.