Active window management: performance assessment through an extensive comparison with XCP

Authors:
M. Barbera;M. Gerla;A. Lombardo;C. Panarello;M. Sanadidi;G. Schembra
Affiliations:
DIIT, University of Catania, Catania, Italy;Computer Science Department, UCLA, Los Angeles, CA;DIIT, University of Catania, Catania, Italy;DIIT, University of Catania, Catania, Italy;Computer Science Department, UCLA, Los Angeles, CA;DIIT, University of Catania, Catania, Italy
Venue:
NETWORKING'08 Proceedings of the 7th international IFIP-TC6 networking conference on AdHoc and sensor networks, wireless networks, next generation internet
Year:
2008

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Abstract

The most efficient approaches defined so far to address performance degradations in end-to-end congestion control exploit the flow control mechanism to improve end-to-end performance. The most authoritative solution in this context seems to be the eXplicit Control Protocol (XCP) which achieves high performance but requires changes in both network routers and hosts which make it difficult to deploy. To this aim we have developed a new mechanism, called Active Window Management (AWM), which is able to maintain the queue length in network routers almost constant providing no loss, while maximizing network utilization. The idea at the basis of AWM is to allow network routers to manipulate the Advertised Window field in TCP ACKs. In this way no modifications to the TCP protocol are required. The target of this paper is to propose an extensive numerical analysis of AWM to compare it with the XCP protocol, chosen as reference case.