The present disclosure describes methods and systems for establishing a Session Initiation Protocol Session. One method includes transmitting a first message requesting authentication configuration information; in response to the first message, receiving a second message that includes the authentication configuration information; transmitting a third message that includes authentication information based upon the received authentication configuration information; receiving an authentication challenge request that is formatted according to the second protocol; and in response to receiving the authentication challenge request, transmitting an authentication response to the second network node.

A method and an apparatus for processing a call to an aggregate endpoint device over a network are disclosed. For example, the method receives a session request by a Serving-Call Session Control Function (S-CSCF), wherein a route header for the session request comprises an aggregate endpoint identifier, and interacts with an application server to receive a Public User Identity (PUID) of the aggregate endpoint device in accordance with the aggregate endpoint identifier. The method performs a termination processing for the session request using the PUID of the aggregate endpoint device, and forwards the session request towards the aggregate endpoint device.

An example system includes: at least one memory; programmable circuitry; and instructions to cause the programmable circuitry to: obtain a public internet protocol (IP) address associated with a household and a timestamp in response to a census impression request indicating a media access on a first client device of the household; obtain a private IP address associated with the first client device; cause storing of the public IP address, the private IP address, and the timestamp in a panelist impression record in association with a panelist identifier, the panelist identifier corresponding to a panelist audience member, the panelist audience member enrolled in a panel of an audience measurement entity; send the census impression request to a census system; and send the panelist impression record to a meter collection system.

A method for RADIUS proxy or Diameter agent address resolution is disclosed. The method may be implemented in a network node including a plurality of message processors. The method includes receiving an inbound RADIUS or Diameter message. The method further includes determining whether address resolution is required for the inbound message. The method further includes, in response to determining that address resolution is required for the inbound message, performing the address resolution. The method further includes routing an outbound message to a destination based on a result of the address resolution, where at least one of the inbound message and the outbound message comprises a RADIUS message.

A method and an apparatus for processing a call to an aggregate endpoint device over a network are disclosed. For example, the method receives a session request by a Serving-Call Session Control Function (S-CSCF), wherein a route header for the session request comprises an aggregate endpoint identifier, and interacts with an application server to receive a Public User Identity (PUID) of the aggregate endpoint device in accordance with the aggregate endpoint identifier. The method performs a termination processing for the session request using the PUID of the aggregate endpoint device, and forwards the session request towards the aggregate endpoint device.

An apparatus is provided that includes a processor configured to maintain a first implicit registration set for a first apparatus, where the first implicit registration set includes a first identity unique to the first apparatus and a shared identity. The processor is also configured to maintain a second implicit registration set for a second apparatus, where the second implicit registration set includes a second identity unique to the second apparatus and the shared identity. In this regard, the first and second implicit registration sets may be maintained to enable registration of the first and second apparatuses with a network such that each of the first and second apparatuses are configured to receive communication requests to the respective first and second identities, and such that both of the first and second apparatuses are configured to receive communication requests to the shared identity.

An example system includes: at least one memory; programmable circuitry; and instructions to cause the programmable circuitry to: obtain a public internet protocol (IP) address associated with a household and a timestamp in response to a census impression request indicating a media access on a first client device of the household; obtain a private IP address associated with the first client device; cause storing of the public IP address, the private IP address, and the timestamp in a panelist impression record in association with a panelist identifier, the panelist identifier corresponding to a panelist audience member, the panelist audience member enrolled in a panel of an audience measurement entity; send the census impression request to a census system; and send the panelist impression record to a meter collection system.