An IMS system includes an IMS initiator user entity. The system includes an IMS responder user entity that is called by the initiator user entity. The system includes a calling side S-CSCF in communication with the caller entity which receives an INVITE having a first protection offer and parameters for key establishment from the caller entity, removes the first protection offer from the INVITE and forwards the INVITE without the first protection offer. The system includes a receiving end S-CSCF in communication with the responder user entity and the calling side S-CSCF which receives the INVITE without the first protection offer and checks that the responder user entity supports the protection, inserts a second protection offer into the INVITE and forwards the INVITE to the responder user entity, wherein the responder user entity accepts the INVITE including the second protection offer and answers with an acknowledgment having a first protection accept. A method for supporting a call by a telecommunications node.

Claims

6 · 2 independent · depth 2

6 granted claims

›1.independentA method for supporting a protected media session by a telecommunications node using control plane signaling comprising:nreceiving a session control i…+2

›4.independentA media control signaling entity operative in a communication network by processing and forwarding media control signaling messages between an initiat…+2

Classifications

5 codes

IPC · International Patent Classification

Section G — Physics

G06F15/16

Section H — Electricity

H04L29/06

USPC · US Patent Classification

726/14726/4726/1

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Pendency

4.4 y

1,604 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Christopher Revak

art unit 2431 · TC 2400

Law firm

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Citations: 13 back · 0 forward

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Priority chain

2 priority documents

Priority

29 Nov 2007

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 60991014	29 Nov 2007
related publication	US 20110010768 A1	13 Jan 2011

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