Patent ID: 7738466

Claim:
Method for retrieving content of a distributed directory of a telecommunication system comprising a plurality of nodes arranged in a directed ring topology, the method comprising: identifying a storage location of said content by means of a distributed hashing function, where the hashing function maps an element onto a node, where the node is responsible for carrying elements with a hash value between the node and its successor node, wherein a redundancy successor link is used in an opposite direction reverse to the ring direction, for identifying neighbor nodes for data replication in order to generate backups at the neighbor nodes in case of node failure; binding a new node to the predecessor node while the predecessor node remains fully connected to its successor node during the join process; transferring of the distributed hashing table information from the predecessor node to the new node; transferring the successor and the redundancy links from the predecessor node to the new node; joining the new node to the ring by contacting the successor node; and changing a link between the predecessor node and the successor node from successor node to redundancy mode.