High performance TCP in ANSNET
ACM SIGCOMM Computer Communication Review
Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
Photonics in switching: Architectures, systems and enabling technologies
Computer Networks: The International Journal of Computer and Telecommunications Networking
Experimental study of router buffer sizing
Proceedings of the 8th ACM SIGCOMM conference on Internet measurement
Perspectives on router buffer sizing: recent results and open problems
ACM SIGCOMM Computer Communication Review
Packet pacing in small buffer optical packet switched networks
IEEE/ACM Transactions on Networking (TON)
Optical packet switching: A reality check
Optical Switching and Networking
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Buffers in emerging optical packet routers are expensive resources, and it is expected that they would be able to store at most a few tens of KiloBytes of data in the optical domain. When TCP and real-time (UDP) traffic multiplex at an optical router with such small buffers (less than 50 KB), we recently showed that UDP packet loss can increase with increasing buffer size. This anomalous loss behaviour can negatively impact the investment made in larger buffers and degrade quality of service. In this paper we explore if this anomalous behaviour can be alleviated by dedicating (i.e., pre-allocating) buffers to UDP traffic. Our contributions within this context are two fold. First, we show using extensive simulations that there would seem to be a critical buffer size above which UDP benefits with dedicated buffers that protect it from the aggressive nature of TCP. However, for smaller buffers that are below this critical value, UDP can benefit by time-sharing the buffers with TCP. Second, we develop a simple linear model that quantitatively captures the combined utility of TCP and real-time traffic for shared and dedicated buffers, and propose a method to optimise the buffer split ratio with the objective of maximising the overall network utility. Our study equips designers of optical packet switched networks with quantitative tools to tune their buffer allocation strategies subject to various system parameters such as the ratio of traffic mix and relative weights associated with TCP and UDP traffic.