Method and server entity for forwarding a message containing a host name or domain name in an internet based communications network
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsRogier August Caspar Joseph Noldus, Jos Den Hartog
Life of this patent
Estimating the term…
Abstract
Method and server entity for forwarding a message containing a host name or domain name in an interne based communications network from a User Agent (UA) to the communications network or vice versa. The method comprises the steps of querying, by a proxy entity, a Domain Name Server (DNS) for obtaining from the Domain Name Server an Internet Protocol (IP) address associated with the host name or domain name, and including the Internet Protocol address in the message prior to forwarding the message to the communications network or User Agent, respectively, by the proxy entity.
Claims12
A method, implemented by a proxy entity, of forwarding a Session Initiation Protocol (SIP) message in an Internet Protocol (IP) Multimedia Subsystem (IMS) telecommunications network from a User Agent (UA) to the communications network or vice versa, the method comprising:
- receiving, at the proxy entity, a SIP message containing a host name or domain name, wherein the proxy entity is a Proxy Call Session Control Function (P-CSCF) entity or an Access Session Border Gateway (A-SBG);
- querying a Domain Name Server (DNS) to obtain, from the DNS, an IP address associated with the host name or domain name contained in the received SIP message;
- and
- including the IP address in the SIP message prior to the proxy entity forwarding the SIP message to the telecommunications network or UA, respectively;
- wherein including the IP address in the SIP message comprises replacing the host name or domain name with the IP address in the SIP message.
A server entity corresponding to a Proxy Call Session Control Function (P-CSCF) entity or an Access Session Border Gateway (A-SBG), the server entity comprising:
- a receiving circuit configured to receive a Session Initiation Protocol (SIP) message containing a host name or domain name in an Internet Protocol (IP) Multimedia Subsystem (IMS) telecommunications network from a User Agent (UA) or the telecommunications network;
- a forwarding circuit configured to forward the message to the telecommunications network or User Agent, respectively;
- a querying circuit configured to query a Domain Name Server (DNS) to obtain from the DNS an IP address associated with the host name or domain name;
- and
- an including circuit configured to include the IP address in the message prior to forwarding the message, wherein including the IP address in the SIP message comprises replacing the host name or domain name with the IP address in the SIP message.
Dependencies are inferred from the claim text.