New Routing Update Mechanisms of Kademlia

Putting forward new routing update mechanisms, improved lookup performance of standard kademlia protocol: each node would advertise others in a range when it is leaving overlay network; and each node should backward notice its routing providers about the failed links founded in its routing lookup process, then lookup initiator and routing providers could update their k-buckets corporately. In the new mechanisms, the dead nodes would be accessed in very low possibility so that the lookup process can be more effective, especially under churn state. Determine arguments of mechanisms and analyze the lookup performance through simulation, prove the validity of the mechanisms.