A New Framework and Burst Assembly for IP Diffserv over Optical Burst Switching Networks

Abstract

IP Differentiated Services (DiffServ) has been standardized by the IETF and is considered as a promising IF QoS solution due to its scalability and ease of implementation. In this paper, we present a novel framework for IP Differentiated Services (DiffServ) over optical burst switching (OBS), namely, DS-OBS. We present the network architecture, functional model of edge nodes and core nodes, the control packet format, a novel burst assembly scheme at ingress nodes and scheduling algorithm of core nodes. The basic idea is to apply DiffServ capable burst assembly at ingress nodes and perform different per hop behavior (PHB) electronic treatment for control packets of different QoS classes service at core nodes. Simulation results show that the proposed schemes can provide the best differentiated service for expedited forwarding (EF), Assured forwarding (AF) and best effort (BE) service in terms of end-to-end delay, throughput and IP packet loss probability.