Title | ||
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Design and performance comparison of multiple-token based MAC protocols for optical burst switched ring networks |
Abstract | ||
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Optical burst switching (OBS) has been proposed as a new optical switching paradigm for the next generation Internet due to
its flexibility and feasibility compared to OCS and OPS. Moreover, serving as a backbone that interconnects a number of access
networks, OBS ring topologies have been a good choice for solving the current metro gap problem between core network and access
network owning to its simplicity and scalability. In this paper, we provide an insight into the OBS ring network that consists
of nodes using TT–TR (Tunable Transmitter–Tunable Receiver). The node architectures with TT–TR may make efficient use of network
resources even though traffic pattern, such as IP traffic with self-similarity dynamically change, and can support good expandability.
However, all nodes share the limited network resources. This may result in contention such as wavelength contention and transceiver
contention leading to burst loss. In order to use the shared network resources fairly and efficiently as well as reducing
the resource contention, we focus on the design of medium access control (MAC) protocols based on multiple tokens. Each token
is allocated to one wavelength to denote the accessibility of that wavelength, i.e., once the token is captured, the corresponding
wavelength can be used to transmit a burst. As tokens hold the key for using wavelengths to transmit bursts, token management
including the token release time is crucial in the proposed MAC protocols. Thus, two kinds of multiple-token based MAC protocols
with different token release times are proposed: token release after transmitting burst (TRTB) and token release after transmitting
control header (TRTC). Each of them is classified into two schemes called TRTB/TRR and TRTB/RCA and correspondingly TRTC/TRR
and TRTC/ RCA. RCA stands for receive collision avoidance. The target is to increase the performance while reducing the processing
overhead at each node. The performance of the TRTB and TRTC protocols are evaluated and compared in terms of queuing delay,
burst loss rate, and channel utilization by OPNET simulation. The effects of various design parameters are also investigated
through simulation in order to evaluate their scalability. In all the proposed schemes, tokens are just used to denote the
accessibility of each wavelength. Finally, as an alternative, we also propose a new scheme based on the TRTC protocol called
TRTC/CAT (collision avoidance by tokens) to avoid contention by using tokens. |
Year | DOI | Venue |
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2008 | 10.1007/s11107-007-0108-8 | Photonic Network Communications |
Keywords | Field | DocType |
Optical burst switching,WDM,MAC protocol | Token passing,Optical burst switching,Computer science,Queuing delay,Computer network,Token ring,Network topology,Ring network,Security token,Token bus network,Distributed computing | Journal |
Volume | Issue | ISSN |
15 | 3 | 1572-8188(Series Online ISSN)1387-974X(Series Print ISSN) |
Citations | PageRank | References |
4 | 0.49 | 7 |
Authors | ||
4 |
Name | Order | Citations | PageRank |
---|---|---|---|
Li-Mei Peng | 1 | 117 | 23.37 |
Kyoung-Min Yoo | 2 | 7 | 1.93 |
Kyeong-Eun Han | 3 | 9 | 2.99 |
Young-Chon Kim | 4 | 129 | 27.82 |