Patent ID: 6763007
Filing Date: 2004-07-13
Classification: H04L,H04W

Abstract:
A method of establishing a routing path for packet delivery to a destination node within a packet-based subnet, said destination node having a destination node address, said method comprising the steps of:launching a path setup message from said destination node; receiving said path setup message over a first interface at a first router; and creating a first routing table entry for a first routing table, said first routing table entry associating a second interface and said destination node address with said first interface, wherein a packet, subsequently received over said second interface and having said destination node address as a packet header destination address, is forwarded from said first router over said first interface after said first router associates said second interface and said destination node address with said first routing table entry, and wherein said first router is incorporated within a first wireless base station, further including forwarding a handoff path setup message, for handoffs processed at a network layer, from a second wireless base station to said first wireless base station if said wireless device is handed off from said first wireless base station to said second wireless base station, said handoff update path setup message used to alter routing table entries for a plurality of subnet routers and further comprising the step of maintaining said first routing table entry as a soft state in said first router, said first routing table entry overwritten with a default entry if a refresh path setup message is not received at said router within a specified period of time.