Shortcut network layer routing for mobile hosts

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5442633
SERIAL NO

07910701

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method for routing a packet of information between two hosts that are coupled to a network. Each of the hosts have a unique network address, and at least one of the hosts is a mobile host (10) that does not have a fixed network coupling location. The method includes a first step of (a) transmitting a packet from the mobile host to a second, destination host on the network through a wireless link that is established between the mobile host and a base access station (12) that serves a current physical location of the mobile host. The base access station is coupled to the network via a subnetwork (LAN) (14), and the packet includes a first Internet Protocol (IP) Loose Source Routing (LSR) option that includes a network address of the base access station. A second step (b) receives with the destination host the packet that includes the first IP LSR option. A third step (c) transmits a further, reply packet from the second host to the mobile host via the base access station in accordance with a path reversal technique wherein the reply packet includes a second IP LSR option that specifies as a first Routing address the network address of the base access station. As a result, the reply packet is directed through the network to the base access station that serves the current physical location of the mobile host, and an optimal, fast routing of the packet is achieved without involving intermediate gateways (16, 18).

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTERNATIONAL BUSINESS MACHINES CORPORATIONARMONK, NY46177

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Perkins, Charles E Ossining, NY 20 1732
Rekhter, Jacob Y Putnam Valley, NY 1 256

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