This is the 11th post in the WCF 4.5 series. The previous post was about the new UDP transport support, and this new post is also about new transports – the WebSocket transport. This post is part 1 of 2. This post will be about the WebSocket support between .NET apps using WCF (SOAP-based), and the next post will be about using WebSockets between browsers and WCF (non-SOAP).
At the end - WebSockets in WCF / ASP.NET is the plumbing, SignalR is an abstraction/implementation over it (like how RIA services is on top of WCF)