TELECOMMUNICATIONS ROUTING

摘要

A method of controlling routing of packets to a mobile node in a packet switching network including an infrastructure of packet switching nodes, said packet switching nodes including a plurality of fixed core nodes and a plurality of access nodes to which routing paths, defined by next-hop forwarding, may be directed in said infrastructure for a given network address, said next-hop forwarding being defined in response to routing defining processes, specifying a characteristic of a route passing through an access node, said method comprising: altering said next-hop forwarding, in at least one of said packet switching nodes in response to mobility of said mobile host from a first access node to a second access node, by a routing defining process, such that after said routing defining process ends: first routing protocol data is held in a first set of packet switching nodes, said first routing protocol data specifying a characteristic of a first route passing through said first access node; and second routing protocol data is held in a second set of packet switching nodes, said second routing protocol data specifying a characteristic of a second route passing through said second access node.