Title :
A TCP-Specific Traffic Profiling and Prediction Scheme for Performance Optimization in OBS Networks
Author :
Ramantas, Kostas ; Vlachos, Kyriakos
Author_Institution :
Comput. Eng. & Inf. Dept., Univ. of Patras, Rio, Greece
fDate :
12/1/2011 12:00:00 AM
Abstract :
The efficient transmission of transport control protocol (TCP) traffic over optical burst-switched (OBS) networks is a challenging problem, due to the high sensitivity of the TCP congestion control mechanism to losses. In this paper, a TCP-specific traffic profiling and traffic prediction scheme is proposed, for optimizing TCP transmission over one-way OBS networks. In the proposed scheme, the burst assembly unit inspects TCP packet headers in parallel to the assembly process, keeping flow-level traffic statistics. These are then exploited to derive accurate traffic predictions, in at least one round trip time prediction window. This allows traffic schedulers to be notified of upcoming traffic changes in advance, in order to optimally reschedule their resource reservations. In this paper, we detail the traffic profiling and prediction mechanism and also provide analytical and simulation results to assess its performance. The performance gains when using the prediction scheme are shown with a modified one-way OBS reservation protocol, which efficiently and in advance reserves resources at the burst level.
Keywords :
optical burst switching; optical fibre networks; telecommunication congestion control; telecommunication traffic; transport protocols; OBS network; OBS reservation protocol; TCP congestion control; TCP packet header; TCP-specific traffic profiling; assembly process; burst assembly unit; flow-level traffic statistics; optical burst-switched network; traffic prediction scheme; transport control protocol; Assembly; Estimation; Protocols; Radiation detectors; Throughput; Time measurement; Vectors; Burst assembly; Optical burst switching; TCP profiling; Traffic estimation;
Journal_Title :
Optical Communications and Networking, IEEE/OSA Journal of
DOI :
10.1364/JOCN.3.000924