Subject: [AVT] RTP Topologies

From: wangdonghui 52440 <[email-masked]>
Date: Tue, 29 Aug 2006 14:13:28 +0800

Hi Magnus ,Stephan,
   The draft of draft-wenger-avt-topologies discusses multi-endpoint topologies commonly used in RTP based environments. But i think there are some topologies missing. For example , in peer-to-peer style IPTV,the following topologies are necessary.
      +---+         +---+         +---+
      | A |<------->| B |<------->| C |
      +---+         +---+         +---+
                 Figure 1 point to point
   The main property of this topology is that A sends to B,Meanwhile ,B sends to C. 
     
      +---+         +---+         +---+
      | A |         | B |         | C |
      +---+ \       +---+        /+---+
              \       |        /
               \      |      /
                 \    |    /
                   \  |  /
                    +---+        
                    | D |
                    +---+        

         Figure 2 Multipoint to point
    The main property of this topology is that multipoint senders(A,B,C) send to D.

    The above are common scenarios in P2P-based streaming media.

Thanks.
Donghui Wang.

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