Ericsson Ab

Telefonaktiebolaget Lm Ericsson (publ)

Venkatesan Pradeep

Chandramouli Balasubramanian

Vamsidhar Valluri

Janardan Ramesh

Rajesh I Balay

Sriganesh Kini

Hua Autumn Liu

Neelesh Bansod

Janaradan Ramesh

A method and apparatus for flexible Mobile IP foreign agent architecture for enabling converged services are described herein. According to one embodiment of the invention, a packet is received over a circuit bound with a converged services domain of a network element. The converged services domain enables forwarding of wired and wireless traffic to a plurality of destination network elements. Upon determining that the circuit is capable of carrying Mobile Internet Protocol (IP) packets, the packet is processed according to an entry in a Mobile IP forwarding information base upon determining that the packet has a corresponding entry in the Mobile IP forwarding information base, and the packet is processed according to a different entry in an IP forwarding information base upon determining that the packet does not have an entry in the Mobile IP forwarding information base. Other methods and apparatuses are also described.

Flexible mobile IP foreign agent architecture for enabling converged services

Techniques for recovering Mobile Internet Protocol (IP) session(s) of a mobility agent in a Mobile IP network are described herein. In one embodiment of the invention, for each mobility session associated with a mobility agent, the mobility agent distributively backs up mobility agent specific information to the mobility agent peer associated with that mobility session. The mobility agent specific information is not used by the mobility agent peer. Upon the mobility agent inadvertently losing at least one mobility session, the mobility agent recovers the stored mobility agent specific information associated with those sessions from the mobility agent peers respectively associated with those sessions. Other methods and apparatuses are also described.

Method and apparatus for mobility agent recovery

Transferring a mobile node from one ASN-GW (anchor access service network gateway) to another ASN-GW is referred to as a hand-over. To facilitate transfer of data for the hand-over, a GRE (generic routing encapsulation) tunnel is established between the two ASN-GWs. Traffic through the GRE tunnel arriving at a line card of an ASN-GW is redirected from the arrival line card to the one line card that contains information for the mobile node. The redirection is based on traversal of one or more tables on the line cards. These tables are indexed according to GRE keys corresponding to the mobile nodes. Therefore, the appropriate line card for the traffic can be identified quickly and efficiently using a distributed forwarding plane with minimal provisioning overhead, resulting in lower latency during the hand-over.

Method and apparatus for providing WiMAX (worldwide interoperability for microwave access) anchor mode service on a system with distributed forwarding planes

According to one embodiment, in response to at least one of a link failure and node failure of a protected label switched path (LSP), network traffic is switched onto a protection path according to a fast re-reroute (FRR) scheme. A HELLO session is established with the remote node that is not immediately adjacent to the network element, including exchanging one or more HELLO messages with the remote node, each HELLO message having a time-to-live (TTL) value of greater than one if IP forwarding is used. The TTL value of the HELLO message is set to one if the HELLO message is sent via tunnel. In response to a request to restart, a resource reservation protocol (RSVP) traffic engineering (TE) graceful restart (GR) procedure is performed using information obtained from the one or more HELLO messages exchanged with the remote node during the HELLO session.

Growing community of inventors

Cupertino, CA, United States of America

Venkatesan Pradeep