Method and system for distributing session key across gatekeeper zones in a direct-routing mode
AssigneeHuawei Technologies Co., Ltd.
InventorKun Li
Life of this patent
Estimating the term…
Abstract
A method for distributing a session key across GateKeeper (GK) zones in a direct-routing mode, including the following steps: a caller's GK and a callee's GK determine a session key distributing mode for a caller and a callee to distribute the session key according to information contained in a received message and pre-configured rules for selecting the session key distribution mode. An embodiment of the present invention also provides a system for distributing a session key across GK zones in a direct-routing mode. The method and the system make it possible for the caller's GK and the callee's GK to select the session key distribution mode, and improves the flexibility of the session key distribution for the GKs.
Claims20
A method for distributing a session key across GateKeeper (GK) zones in a direct-routing mode, comprising:
- a caller carrying session key distribution modes supported by the caller in an Admission Request (ARQ) message, and sending the ARQ message to a caller's GK;
- the caller's GK determining a session key distribution mode of the caller according to the session key distribution modes supported by the caller carried in the ARQ message, carrying the determined session key distribution mode of the caller in a Location Request (LRQ) message, and sending the LRQ message to a callee's GK;
- the callee's GK determining a session key distribution mode of the callee according to the information carried in the LRQ message, generating a session key between the caller and the callee, and sending a Location Confirm (LCF) message containing the session key distribution mode of the callee and the generated session key to the caller's GK;
- the caller's GK determining a session key between the caller and the callee according to the information carried in the LCF message and the session key distribution modes supported by the caller, sending a call Admission Confirm (ACF) message containing the determined session key to the caller;
- the caller sending a Setup message containing the session key to the callee.
A system for distributing a session key across GateKeeper (GK) zones in a direct-routing mode, comprising:
- a caller, a callee, a call's GK and a callee's GK;
- wherein
- the caller is configured to carry session key distribution modes supported by the caller in an Admission Request (ARQ) message and send the ARQ message to the caller's GK;
- the caller's GK is configured to determine a session key distribution mode for the caller according to the session key distribution modes supported by the caller carried in the ARQ message, carry the determined session key distribution mode in a Location Request (LRQ) message, and send the LRQ message to the callee's GK;
- the callee's GK is configured to determine the session key distribution mode of the callee according to the information carried in the LRQ message, generate a session key between the caller and the callee, and send a Location Confirm (LCF) message containing the session key distribution mode of the callee and the generated session key to the caller's GK;
- the caller's GK is further configured to determine the session key according to the information carried in the LCF message and the session key distribution modes supported by the caller, send a call Admission Confirm (ACF) message containing the determined session key to the caller;
- the caller is further configured to send a Setup message containing the session key to the callee.
Dependencies are inferred from the claim text.