Agile bandwidth management techniques in slotted all-optical packet switched networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Flow splitting for end-to-end proportional QoS in OBS networks
IEEE Transactions on Communications
An optical burst reordering model for time-based and random selection assembly strategies
Performance Evaluation
Pipelining multicast scheduling in all-optical packet switches with delay guarantee
Proceedings of the 23rd International Teletraffic Congress
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Optical Packet Switching (OPS) is the promising switching technique to utilize the huge bandwidth offered by all-optical networks using the DWDM (Dense Wavelength Division Multiplexing) technology. However, optical packet contention is the major problem in an OPS network. Resolution and avoidance are two schemes to deal with the contention problem. A resolution scheme resolves collisions, while an avoidance scheme tries to reduce the number of potential collision events. Many OPS architectures rely on optical buffers to resolve contention. Unfortunately, optical buffering technology is still immature as it relies on bulky optical fiber delay lines. Furthermore, it requires a complex control. Therefore, a bufferless OPS network could still be the most straightforward implementation in the near future. In this article, we survey the contention resolution and avoidance schemes proposed for bufferless OPS networks. We also review the resolution and avoidance schemes that can handle the Quality of Service (QoS) issue in a QoS-capable bufferless OPS network.