Network support for caller ID verification
First Claim
1. In a communication system supporting a Voice over IP (VoIP) call, wherein a calling party node initiates the VoIP call by sending a Session Initiation Protocol SIP message to a network device the SIP message including an offered IP address associated with the calling party node, and wherein Caller ID information associated with the calling party node and based on the offered IP address is displayed to a called party node, a method of determining the validity of the Caller ID information, the method comprising the network device:
- detecting the offered IP address;
comparing the offered IP address to an actual IP address associated with the calling party node to determine the validity of the offered IP address; and
determining the validity of the Caller ID information based on the validity of the offered IP address, the Caller ID information being valid if the offered IP address is the same as the actual IP address and the Caller ID information being invalid if the offered IP address differs from the actual IP address.
5 Assignments
0 Petitions
Accused Products
Abstract
Caller ID information provided coincident to a Voice over IP (VoIP) call is validated by one or more network devices. An originating router detects an offered IP address associated with a calling party node, for example, upon receiving a SIP Invite message initiated by the calling party node. The originating router determines the validity of the offered IP address and hence determines the validity of the Caller ID information based on the validity of the offered IP address. The originating router sends indicia of the validity to a terminating router, connected to a called party node, by inserting a verification bit in the SIP Invite message and sending the transformed SIP Invite message to the terminating router. Alternatively, the terminating router may query the originating router for indicia of validity. Upon receiving the indicia of validity, the terminating router may notify the called party node and so inform the called party whether it can rely on the Caller ID information.
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Citations
8 Claims
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1. In a communication system supporting a Voice over IP (VoIP) call, wherein a calling party node initiates the VoIP call by sending a Session Initiation Protocol SIP message to a network device the SIP message including an offered IP address associated with the calling party node, and wherein Caller ID information associated with the calling party node and based on the offered IP address is displayed to a called party node, a method of determining the validity of the Caller ID information, the method comprising the network device:
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detecting the offered IP address; comparing the offered IP address to an actual IP address associated with the calling party node to determine the validity of the offered IP address; and determining the validity of the Caller ID information based on the validity of the offered IP address, the Caller ID information being valid if the offered IP address is the same as the actual IP address and the Caller ID information being invalid if the offered IP address differs from the actual IP address. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a communication system supporting a Voice over IP (VoIP) call, wherein a calling party node initiates the VoIP call by sending a Session Initiation Protocol (SIP) message to a network device, the SIP message including an offered IP address associated with the calling party node, and wherein Caller ID information associated with a the calling party node and based on the offered IP address is displayed to a called party node, a network device comprising:
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means for receiving a the SIP message and detecting the offered IP address; means for comparing the offered IP address to an actual IP address associated with the calling party node to determine the validity of the offered IP address; and means for determining the validity of the Caller ID information based on the validity of the offered IP address, the Caller ID information being valid if the offered IP address is the same as the actual IP address and the Caller ID information being invalid if the offered IP address differs from the actual IP address.
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Specification