Two way live communication between web and windows application

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.NET4

I need to build a website and an Window application that communicate together, in both directions, communication will be a video communication. In fact I have to create a video conffrecing application between Doctor and Patient.I am using website with ASP.NET, and the window application in C#.

Request is fist initiated by the window application(patient).

Please let me know, is it possible to do this through the using ASP.net web application and window application???

Since I think it is not possible to do the dual communication, since the once the request is sent by window application to the website, the request life lime will be ended after processing the request.


If not? then please suggest me what approach should I follow for this.
Should I go using WCF application.
and how I will implement it.

Please Help me :(
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Thanks in Advance!!