US 2015/0319196 A1Published application

Method and System for Transfer of Call Control

AssigneeTelefonaktiebolaget L M Ericsson (publ)

InventorsRogier Noldus, Sjoerd de Jong, Jos Den Hartog

Life of this patent

Estimating the term…

Loading patent…

Abstract

According to an aspect of the present disclosure, a method is disclosed for a SIPIMR node to withdraw from a SIP session set-up loop by replying a redirect message to the SIP Invite sending node. The redirect message contains information for setting up alternative SIP session, said information being available in the SIP Invite receiving node. This information is usable by the SIPIMS node for establishing an alternative SIP session as well as information needed by other nodes and applications further on in the SIP session set-up loop. The SIPIMS node is specially adapted to retrieve the information from the redirect message for establishing a new SIP session based on and containing the information from the redirect message. Several implementations are given for use in an IP Multimedia Subsystem of a telecommunication network.

Claims6

Dependent claims

A method, implemented in a Session Initiation Protocol (SIP) Invite message-receiving (SIPIMR) node in a communication network, for withdrawing the SIPIMR node from a SIP session setup loop, while still passing on information available at the SIPIMR node to other nodes further on in a SIP loop that is to be established, the method comprising:

receiving a SIP Invite message from a SIP Invite message-sending (SIPIMS) node;
halting a SIP session setup requested by the SIP Invite message;
comparing said SIP Invite message with conditions stored at said SIPIMR node to determine whether the SIP Invite message meets said conditions;
responsive to said SIP Invite message not meeting said conditions, continuing the halted SIP session setup without removing the SIPIMR node from the SIP session setup loop;
and
responsive to said SIP Invite message meeting said conditions:
forwarding fields of said SIP Invite message to higher level functions in said SIPIMR node;
receiving a command responsive to said forwarding, to either continue the halted SIP session setup without removing the SIPIMR node from the SIP session setup loop;
or to redirect the SIP session setup loop, the command to redirect including SIP Invite header field identifications with field content values;
and
responsive to said command to redirect, subsequently:
assembling a SIP Redirect message having header URI parameters including said SIP Invite header field identifications with field content values;
and
sending the SIP Redirect message back to the SIPIMS node and discontinuing the halted SIP session setup.

11 more elements

A Session Initiation Protocol (SIP) Invite message receiving (SIPIMR) node in a communication network comprising circuitry configured as:

a receiver for receiving SIP messages;
a sender for sending SIP Redirect messages;
and
a SIP stack controller for handling received SIP messages;
and
a redirect handler for handling SIP Redirect messages, said redirect handler comprising:
a first interface for exchanging SIP Invite and SIP Redirect messages with said SIP stack controller, to trigger said SIP stack controller to continue operation;
storage for storing conditions to be applied to received SIP Invite messages;
a second interface configured to receive said conditions from one or more higher level functions in said SIPIMR node, to send relevant field information of said SIP Invite or SIP Redirect messages, and to receive decision commands for handling said SIP Invite or SIP Redirect messages;
and
control logic configured to:
receive a SIP Invite message from a SIP Invite message-sending (SIPIMS) node;
halt a SIP session setup requested by the SIP Invite message;
compare said SIP Invite message said conditions stored at said SIPIMR node to determine whether the SIP Invite message meets said conditions;
responsive to said SIP Invite message not meeting said conditions, continue the halted SIP session setup without removing the SIPIMR node from the SIP session setup loop;
and
responsive to said SIP Invite message meeting said conditions:
forward fields of said SIP Invite message to higher level functions in said SIPIMR node;
receive a command responsive to said forwarding, to either continue the halted SIP session setup without removing the SIPIMR node from the SIP session setup loop;
or to redirect the SIP session setup loop, the command to redirect including SIP Invite header field identifications with field content values;
and
responsive to said command to redirect, the control logic being further configured to subsequently:
assemble a SIP Redirect message having header URI parameters including said SIP Invite header field identifications with field content values;
and
send the SIP Redirect message back to the SIPIMS node and discontinue the halted SIP session setup.

22 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/797,822Filed 13 Jul 2015
Priority: 23 Jan 2012
Published: 5 Nov 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04L 65/104
Signalling gateways: in the network
H04L 65/1016
Architectures or entities: iP multimedia subsystem [IMS]
H04L 65/1069
Session management: session establishment or de-establishment
H04L 65/1095
In-session procedures: inter-network session transfer or sharing

Family

Application13/321,063Continuation · filed 23 Jan 2012
Application14/797,822Continuation
US 2012/0124222 A1Published application
US 9,112,876 B2Related patent
US 9,736,192 B2Related patent
US 2015/0319196 A1This patent

From the US filing history. Foreign family members aren’t listed.