Next-generation high-speed Internet backbone networks will be
required to support a broad range of emerging applications which
may not only require significant bandwidth, but may also have
strict quality of service (QoS) requirements. Furthermore, the
traffic from such applications are expected to be highly bursty in
nature. For such traffic, the allocation of static fixed-bandwidth
circuits may lead to the over-provisioning of bandwidth resources
in order to meet QoS requirements.
Optical burst switching (OBS) is a promising new technique which
attempts to address the problem of efficiently allocating resources
for bursty traffic. In OBS, incoming data is assembled into bursts
at the edges of the network, and when the burst is ready to be
sent, resources in the network are reserved only for the duration
of the burst. The reservation of resources is typically made by an
out-of-band one-way control message which precedes the burst by
some offset time. By reserving resources only for the duration of
the burst, a greater degree of utilization may be achieved in the
network.
This book provides an overview of optical burst switching.
Design and research issues involved in the development of OBS
networks are discussed, and approaches to providing QoS in OBS
networks are presented. Topics include:
- Optical burst switching node and network architectures
- Burst assembly
- Signaling protocols
- Contention resolution
- Burst scheduling
- Quality of service in OBS networks
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