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Re: [MMUSIC] RTSP: Connectionless vs. connection-based

Hi Jonathan,

I have tried to write down the conclusions I have made from the 
discussion into specification text. The chapter below should be viewed 
in the context of the rest of what is written in chapter 9 of 
draft-ietf-mmusic-rfc2236bis-01.txt. Please comment on this text.

-----

9.3 The usage of connections

   TCP can be used for both persistent connections and for one message
   exchange  per  connection,  as  presented above. This section gives
   further rules and recommendations on how to  handle  these  connec-
   tions so maximum interoperability and flexibility can be achieved.

   A  server  SHALL  handle  both  persistent  connections   and   one
   request/response  transaction  per connection. A persistent connec-
   tion MAY be used  for  all  transactions  between  the  server  and
   client, including messages setup and teardown of multiple RTSP ses-
   sions. However the persistent connection MAY also be closed after a
   few message exchanges, e.g. the initial setup and play command in a
   session. Later when the client wishes to send a new  request,  e.g.
   pause,  to the session a new connection is opened.  This connection
   may either be for a single message exchange or can be kept open for
   several messages, i.e. persistent.

   The client MAY close the connection at any time when no outstanding
   request/response  transactions  exist.  The server SHOULD NOT close
   the connection unless at least one RTSP session timeout period  has
   passed  without  data traffic. A server MUST NOT close a connection
   directly after responding to a TEARDOWN request for the whole  ses-
   sion.

   The client SHOULD NOT have more than one connection to  the  server
   at any given point. If a client or proxy handles multiple RTSP ses-
   sions on the same server, it is RECOMMENDED to use  only  a  single
   connection.

-- 
Regards

Magnus Westerlund 

Multimedia Technologies, Ericsson Research ERA/TVA/A
----------------------------------------------------------------------
Ericsson Radio Systems AB  | Phone +46 8 4048287
Torshamsgatan 23           | Fax   +46 8 7575550
S-164 80 Stockholm, Sweden | mailto: magnus.westerlund@era.ericsson.se




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