Inter-Domain QoS Routing Scheme Using BGP Information in Global Internet

In order to provide end-to-end Quality of Service (QoS) in the Internet, each connection should be satisfied with QoS requirements in both intra-domain and inter-domain. However, since Border Gateway Protocol (BGP) is an inter- Autonomous System (AS) routing protocol based on path vector, it is hard to guarantee end-to-end QoS in multi-domain environments. To overcome difficulty of inter-domain routing and maintain backward compatibility, Path Computation Element (PCE) is introduced to manage link state information and compute QoS paths. In this paper, we propose an inter-domain QoS routing scheme using BGP information to reduce connection setup delay in the Internet with PCE. We also compare the performance of the proposed scheme with those of conventional PCE structures. The results show that the performance of the proposed scheme is superior to the those of conventional ones.