Mobile IP for mobile Ad Hoc networks
First Claim
1. A method for communicating information between nodes in a mobile ad hoc network and the Internet, the mobile network including at least one first mobile node and a second node, the at least one first mobile node having a home address and using the home address for communicating with the Internet, the second node acting as a gateway for communicating information between the first mobile node and the Internet, wherein in sending information from the at least one of the mobile nodes first default routes and network routes using either tunnelling or proxying are incorporated.
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Accused Products
Abstract
In a wireless or mobile ad hoc network the routing intetworks with the ordinary Internet routing using the Mobile IP. Mobile IP foreign agents are used as gateways between the ad hoc network and the Internet. The nodes in the ad hoc network use their s home addresses for all communication and register with a foreign agent in the network. To send packets to hosts on the Internet either tunnelling or proxying is used. To receive packets from the Internet the packets are routed to the foreign agent using the Mobile IP. The foreign agent then routes the packets to the destination in the ad hoc network. Since the ordinary Mobile IP requires link-layer connectivity between the foreign agent and a visiting node which is not guaranteed on the ad hoc network, modifications are accordingly made to the procedures of the Mobile IP.
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Citations
42 Claims
- 1. A method for communicating information between nodes in a mobile ad hoc network and the Internet, the mobile network including at least one first mobile node and a second node, the at least one first mobile node having a home address and using the home address for communicating with the Internet, the second node acting as a gateway for communicating information between the first mobile node and the Internet, wherein in sending information from the at least one of the mobile nodes first default routes and network routes using either tunnelling or proxying are incorporated.
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2. A method for route discovery in a mobile ad hoc network which is interworking with the Internet, the ad hoc network comprising a first mobile node having a home address, the first node using its home address for communicating with the Internet, and further comprising a second node acting as a gateway for communicating information packets between the first node in the ad hoc network and the Internet, the gateway being a Mobile IP foreign agent, the method comprising the steps of:
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sending a route request at initiation of communication with a destination using the gateway;
forwarding from the gateway the route request comprising a sequence number, the destination being external to the ad hoc network;
sending a check to the destination;
receiving an indication from the destination, the indication being positive or negative;
sending a proxy route reply after receiving a positive indication from the destination; and
adding a route table entry for the external destination comprising a sequence number equal to or higher than the sequence number in the route request.
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- 3. A mobile ad hoc network comprising a plurality of nodes including at least one first mobile node and a second node, the at least one first mobile node having a home address and using the home address for communicating with the Internet, the second node acting as a gateway for communicating information between the first mobile node and the Internet, wherein at least one of the nodes in the mobile ad hoc network comprises means for incorporating default routes and network routes using either tunnelling or proxying, in order to be capable of sending information from the at least one first mobile node to the Internet.
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19. The mobile ad hoc network of
claim 19 , wherein agents periodically broadcast an agent advertisement to all nodes in the network, and when nodes solicit foreign agents, the agents respond by broadcasting an agent advertisement to all the nodes in the network.
Specification