| 摘要 |
A node ( 200 ) for routing Peer-to-Peer, P2P, communication between subscribers in a public land mobile network, PLMN, adapted to be located as a gateway between the packet switched domain of the PLMN and an external Packet Data Network, PDN, comprising a routing functionality for routing messages between the packet switched domain of the PLMN and the external PDN, connectable to at least a second node, the node ( 200 ) wherein it further comprises a terminating functionality ( 202 ) for terminating a protocol carrying a request from a sending subscriber for an IP address given a MSISDN identity of a receiving subscriber, and a database ( 201 ) comprising the mapping between the IP address and the MSISDN identity of the receiving subscriber.
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