On account of the glary future of Optical Burst Switching (OBS) network and the abundant Transmission Control
Protocol (TCP) traffic, study of TCP combing OBS are prevail in the recent years. In this paper, we address the issue of
assembly algorithm in OBS network based on unsymmetrical TCP traffic. The Optimal Maximum Assembly Length
(OMAL) in Max-Time-Min-Max-Length Assembly Algorithm is studied in this paper and an assembly algorithm with
edge node differentiation based on unsymmetrical traffic is presented by investigating the feature of TCP flow. We also
propose client's Average Download Rate (ADR) as an evaluation standard and the simulation results show that the
Assembly Algorithm with EN Differentiation will improve client's ADR a lot.
OBS is a promising network infrastructure. RBUDP is a UDP-based protocol used for large bulk data transfer. Existing
research focuses on its performance over long fat networks. In this paper, RBUDP transmission performance over OBS
networks is evaluated by simulation and experiment. Experiments show transmission of RBUDP features high (95%)
average utilization efficiency of bandwidth and insensitivity to large assembly delay (100ms) and high burst loss
Grid technology which provide a uniform interface to geographically distributed resources has been extensively developed in recently years. It is imperative to support QoS for Grid application, the main problems providing QoS in OBS network is exact understanding different Grid application's requirements and selecting the right policy to quantitatively offer them. In this paper we combine the Class Based Weight Fair Queuing and Preemption Latest Available Unused Channel with Void Filling (PLAUC-VF) and propose a absolute QoS architecture in OBS network for Grid application.