Abstract: The performance of Internet Protocols, particularly when they 
operate across bandwidth-limited circuits, is coming under increased 
attention as commercial use is made of the Internet. In addition, the 
development of intra-company ``intranets" is focussing additional attention 
on the efficiency of the protocols. The expected arrival of the ABR 
(Available Bit Rate) service from wide-area ATM suppliers is expected to 
place additional pressure on the performance issue, as ABR virtual circuits 
can be subject to rapid fluctuations of throughput capacity, with a subsequent
degradation in the performance of the major end-to-end transport protocol;
TCP. This Technical Report proposes a novel rate-management protocol for
operation within the LAN portions of intranets which will remove most of
the negative impacts of varying and limited bandwidth circuits. The report
also includes the results of an analysis of the protocol, using
analytical and simulation techniques.