Patent ID: 7617316

Claim:
A network connection device comprising: a bridge module relaying a communication module of a first communication mode connected to a first network line and a communication module of a second communication mode connected to a second network line; a proxy Universal Plug and Play (UPnP) service module connected with the bridge module, and providing a proxy function of a network device of the second communication mode; and a duplicate proxy Universal Plug and Play service module connected with the communication module of the first communication mode and the proxy Universal Plug and Play service module, wherein the duplicate proxy Universal Plug and Play service module, in the case where a normal bridge has access to a network first and then the network connection device has access to the network, according to a response message of the normal bridge responding to a search message which the network connection device sends, checks whether a proxy Universal Plug and Play device in which the proxy function of a non-TCP/IP layer based network device is realized is activated at the normal bridge and prevents the proxy function of the network device of the second communication mode from being duplicated and activated at a plurality of bridges, and wherein the duplicate proxy Universal Plug and Play service module, in the case where the network connection device has access to a network first and then a normal bridge has access to the network, checks whether a proxy Universal Plug and Play device which is activated at the normal bridge is identical to a proxy Universal Plug and Play device which has been already activated at the proxy Universal Plug and Play service module and prevents the proxy function of the network device of the second communication mode from being duplicated and activated at a plurality of bridges.