Subject: [AVT] RFC 3550: general request about two RTP Session in a voice path

From: [email-masked]
Date: Thu, 13 Oct 2005 08:32:36 +0800

In 3gpp2,mobile phone can connect to media gateway based softswitch 
throught the base station system..
The topo like this.

The red dashed imply the voice path of mobile phone.The blue dashed imply 
the rtp path between Base station and media gateway.
Follow figure above, the voice packet can be forwarded thoroughly in media 
gateway if all mobile phone use the same voice code. But as a receiver in 
rtp session1, media gateway should collect rtp packets from the 
network,repair and correct for any lost packets,recover the time,so media 
gateway must to buffer those packets.Unfortunatly this add delay to the 
voice path.

Question:
1.      Should the media gateway as the receiver in rtp session1 to buffer 
those voice packets? Why not it forward thoroughly?
2.      If media gateway forward those packets thoroughly,the RTCP should 
be generated by Base station2.Can we do like this?

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