Patent ID: 8732298

Claim:
A method for maintaining routing information, comprising: receiving, by a super maintenance node, routing update information of an ordinary node in a home network area of the super maintenance node from the ordinary node; sending, by the super maintenance node, the received routing update information to super maintenance nodes in other network areas; calculating, by the super maintenance node, a range of node IDs in a second network area and creating routing update information according to a method for constructing a node ID that carries geographic location information when the super maintenance node knows that super maintenance nodes in the second network area have failed and notifying, by the super maintenance node, ordinary nodes in the home network area of the super maintenance node of the created routing update information; and performing, by the super maintenance node, a registration including: registering, by the super maintenance node, node ID, IP address, and hierarchical relations, of the super maintenance node in a DHT; or registering, by the super maintenance node, in a public address; or registering, by the super maintenance node, as an IP Anycast group member.