QoS support for UDP/TCP based networks

✍ Scribed by S.-H Jeong; H Owen; J Copeland; J Sokol

• Book ID: 104273657
• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 351 KB
• Volume: 24
• Category: Article
• ISSN: 0140-3664
• DOI: 10.1016/s0140-3664(00)00290-5

✦ Synopsis

To support UDP-based real-time applications over the Internet, it is necessary to provide bandwidth to the UDP applications within the network so that the performance of the UDP applications will not be seriously affected during periods of congestion. UDP ¯ows do not typically back off when they encounter congestion. Thus, UDP ¯ows aggressively use up more bandwidth than TCP friendly ¯ows. Therefore, while it is important to have router algorithms support UDP ¯ows by assigning appropriate bandwidth, it is also necessary to protect responsive TCP ¯ows from unresponsive or aggressive UDP ¯ows so that all users get a reasonable quality of service (QoS). In this paper, we propose a set of router-based QoS mechanisms including queue policy, resource reservation, and metering. These router-based QoS mechanisms provide rate guarantees to UDP ¯ows, protection of well-behaved TCP ¯ows from unresponsive UDP ¯ows, and bandwidth fairness between TCP ¯ows.