QoS Extension to BGP

To enable the end-to-end Quality of Service (QoS) guarantees in the Internet, based on the Border Gateway Protocol (BGP), inter-domain QoS advertising and routing are important. However, little research has been done in this area so far. Two major challenges, scalability and heterogeneity, make the QoS extension to BGP difficult. Two existing approaches, the Link Capacity Routing (LCR) and the Available Bandwidth Routing (ABR), address QoS advertising and routing in BGP with respect to bandwidth metric. But neither of them can solve the two challenges well. In this paper, BGP is extended to advertise bandwidth information. But, instead of using link capacities or instantaneous available bandwidth values, a novel QoS metric, Available Bandwidth Index (ABI), is defined and used to perform bandwidth advertising and routing. The two maributions of ABI are: (1) ABI dynamically abstracts available bandwidth into a probability interval, therefore, it is very flexible to represent heteroge...

• Type: Conference
• Year: 2002
• Where: ICNP
• Authors: Li Xiao, King-Shan Lui, Jun Wang, Klara Nahrstedt
• Keywords: Available Bandwidth, ICNP 2002, QoS Advertising, Routing