I-D ACTION:draft-westberg-pcn-load-control-00.txt

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	Title		: LC-PCN - The Load Control PCN solution
	Author(s)	: L. Westberg, et al.
	Filename	: draft-westberg-pcn-load-control-00.txt
	Pages		: 30
	Date		: 2007-5-25

   There is an increased interest of simple and scalable resource  
   provisioning solution for Diffserv network. 
   The Load Control PCN (LC-PCN) addresses the following issues:
     1. Admission control for real time data flows in stateless Diffserv 
   Domains
  2. Flow termination: Termination of flows in case of exceptional 
     events, such as severe congestion after re-routing.  

   Admission control in a Diffserv stateless domain is a combination of:
     1. Probing, whereby a probe packet is
        sent along the forwarding path in a network to determine        
        whether a flow can be admitted based upon the current
        congestion state of the network
     2. Admission control based on data marking, whereby in congestion 
        situations the data packets are marked to notify the egress node 
        that a congestion occurred on a particular ingress to egress 
        path.

   The scheme provides the capability of controlling the traffic load in 
   the network without requiring signaling or any per-flow processing in 
   the core routers. The complexity of Load Control is kept to a minimum 
   to make implementation simple.

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