1.3 Overview

The WDS Multicast Transport Protocol, in conjunction with WDS Multicast Application Protocol, allows transmission of data from a single server to multiple clients using the multicast feature of the User Datagram Protocol (UDP). The client follows the steps outlined in the following procedure to download the content using multicast session.

  1. The client has obtained the details of multicast session using WDS Multicast Session Initiation Protocol.

  2. The client joins the multicast session.

  3. WDS Multicast Application Protocol, as specified in [MS-WDSMA] on the server asks the client, using WDS Multicast Transport Protocol, for portions of the content the client is missing.

  4. WDS Multicast Application Protocol uses WDS Multicast Transport Protocol to send all missing pieces of the content to the client.

  5.  When client has received all pieces of the content, it leaves the multicast session.