有許多技術使用在家庭網路方面，而其中之一就是UPnP協定。但UPnP受限於本身的限制只能在一個子網路內進行其訊息的傳輸。之前Intel曾提供一個系統“Intel Relay”來連接二個子網路， 但這系統的一些缺點使得這個系統不適合實用在數位家庭與辨公室等處之連接。另外，UPnP開放式的架構使其在安全性一直不完整。建立一個有效，省資源，又有一定安全性的系統，讓它在家庭或辨公室或圖書館等不同子網路形成連接，就是本研究的目的。

　　Many techniques are used in home networking ，and UPnP is one of them .UPnP messages are transported in a subnet because of the limitation.．Before，Intel supported a system called“Intel Relay ”to connect two subnets． But the disadvantage of the system makes it not suitable for being used in connections between home network and office。Otherwise，the web service architecture of UPnP makes it not safe ．Building an effective，resource saving，and safe system，using it to connect subnets like a home network or an office or a library is the purpose of the research．

[1]Allard, J.; Chinta, V.; Gundala, S.; Richard, G.G., III; Jini meets UPnP : An architecture for Jini/UPnP Interoperability , Applications and the Internet, 2003. Proceedings. 2003 Symposium on 27-31 Jan. 2003 Page(s):268 – 275
[2]CyberLink Homepage http://www.cyberlink.com/
[3]Corcoran, P.M.; Desbonnet, J.; Bigioi, P.; Lupu, I.;Home network infrastructure for handheld/wearable appliances , Consumer Electronics, IEEE Transactions onVolume 48, Issue 3, Aug. 2002 Page(s):490 - 495
[4]Intel Homepage http://www.intel.com/
[5]Microsoft Homepage http://www.microsoft.com/
[6]Miller, B.A.; Nixon, T.; Tai, C.; Wood, M.D Home Network with Universal Plug and Play ,.;Communications Magazine, IEEE,Volume 39, Issue 12, Dec. 2001
[7]Mills, K.; Dabrowski, Adaptive jitter control for UPnP M-search , C.;Communications, 2003. ICC '03. IEEE International Conference onVolume 2, 11-15 May 2003 Page(s):1008 - 1013
[8]UPnP Architecture 1.0
[9]UPnP Device Security 1.0
[10]UPnP Forum http://upnp.org/
[11]UPnP Security Console 1.0