System and method for determining trust for SIP messages
First Claim
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1. A method performed by a first network node of an Internet Protocol (IP) Multimedia Subsystem (IMS) Network, the method comprising:
- receiving, at the first network node, a Uniform Resource Identifier (URI) in a header field in a first Session Initiation Protocol (SIP) message;
receiving, at the first network node, a token in the header field in the first SIP message, the token indicative of a type of a network node in a path of the first SIP message, wherein the first SIP message is a SIP REGISTER message;
based on the received token, sending, from the first network node, a second SIP message including the received URI, the second SIP message conveying information about the first network node; and
receiving a third SIP message triggered by the first SIP REGISTER message, wherein the third SIP message triggered by the first SIP REGISTER message involves a configuration by initial Filter Criteria on a Serving Call Session Control Function (S-CSCF).
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Abstract
A method for performing initial registration is provided. The method includes receiving a server timeout message, the server timeout message including at least a field set to a value equal to a value received during a first registration. The method further includes initiating restoration procedures by performing an initial registration.
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Citations
19 Claims
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1. A method performed by a first network node of an Internet Protocol (IP) Multimedia Subsystem (IMS) Network, the method comprising:
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receiving, at the first network node, a Uniform Resource Identifier (URI) in a header field in a first Session Initiation Protocol (SIP) message; receiving, at the first network node, a token in the header field in the first SIP message, the token indicative of a type of a network node in a path of the first SIP message, wherein the first SIP message is a SIP REGISTER message; based on the received token, sending, from the first network node, a second SIP message including the received URI, the second SIP message conveying information about the first network node; and receiving a third SIP message triggered by the first SIP REGISTER message, wherein the third SIP message triggered by the first SIP REGISTER message involves a configuration by initial Filter Criteria on a Serving Call Session Control Function (S-CSCF). - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system, comprising:
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a first network node of an Internet Protocol (IP) Multimedia Subsystem (IMS) Network, the first network node configured to; receive a Uniform Resource Identifier (URI) in a header field in a first Session Initiation Protocol (SIP) message; receive a token in the header field in the first SIP message, the token indicative of a type of a network node in a path of the first SIP message, wherein the first SIP message is a SIP REGISTER message; and based on the received token, send a second SIP message including the received URI, the second SIP message conveying information about the first network node; and receive a third SIP message triggered by the first SIP REGISTER message, wherein the third SIP message triggered b the first SIP REGISTER message involves a configuration by initial Filter Criteria on a Serving Call Session Control Function (S-CSCF). - View Dependent Claims (8, 9, 10, 11, 12)
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13. A computer program product comprising a non-transitory tangible computer readable storage medium having instructions stored thereon that, when executed by a processing device, implement a method performed by a first network node of an Internet Protocol (IP) Multimedia Subsystem (IMS) Network, the method comprising:
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receiving a Uniform Resource Identifier (URI) in a header field in a first Session Initiation Protocol (SIP) message; receiving a token in the header field in the first SIP message, the token indicative of a type of a network node in a path of the first SIP message, wherein the first SIP message is a SIP REGISTER message; based on the received token, sending a second SIP message including the received URI, the second SIP message conveying information about the first network node; and receiving a third SIP message triggered by the first SIP REGISTER message, wherein the third SIP message triggered by the first SIP REGISTER message involves a configuration by initial Filter Criteria on a Serving Call Session Control Function (S-CSCF). - View Dependent Claims (14, 15, 16, 17, 18)
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19. A system, comprising:
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a first network node of an Internet Protocol (IP) Multimedia Subsystem (IMS) Network, the first network node comprising; a receiver configured to receive a Uniform Resource Identifier (URI) in a header field in a first Session Initiation Protocol (SIP) message and a token in the header field in the first SIP message, the token indicative of a type of a network node in a path of the first SIP message, wherein the first SIP message is a SIP REGISTER message; and a transmitter configured to send, based on the received token, a second SIP message including the received URI, the second SIP message conveying information about the first network node, wherein the receiver is further configured to receive a third SIP message triggered by the first SIP REGISTER message, wherein the third SIP message triggered by the first SIP REGISTER message involves a configuration by initial Filter Criteria on a Serving Call Session Control Function (S-CSCF).
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Specification