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Proceedings Paper

Towards more practical LCAS for VCAT in MSTP ASIC
Author(s): Peng Wang; Jishi Li; Depeng Jin; Lieguang Zeng
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Paper Abstract

Link Capacity Adjustment Scheme (LCAS) is a protocol to provide hitless bandwidth adjustment of virtual concatenated (VCAT) signal under the control of network management system (NMS). It has much larger flexibility to dynamically assign resources and becomes an important feature for multi-service transport platform (MSTP) systems. However, the scheme is a two-way handshake signalling with status messages exchanged continuously, which can hardly be implemented within a single chip. Aiming at an easier implementation in ASIC, we revise the LCAS protocol to have a shorter handshaking procedure by adding MST bits in the reserved K4 bits and remove the complex mappings between TU12s and theirs SQs. Simulation results show that the revised LCAS shortens the period of handshaking procedure and synthesis results show that the size of logic is greatly reduced. We believe the new scheme will be accepted and applied in future.

Paper Details

Date Published: 5 December 2005
PDF: 8 pages
Proc. SPIE 6022, Network Architectures, Management, and Applications III, 60223J (5 December 2005);
Show Author Affiliations
Peng Wang, Tsinghua Univ. (China)
Information Engineering Univ. (China)
Jishi Li, Tsinghua Univ. (China)
Depeng Jin, Tsinghua Univ. (China)
Lieguang Zeng, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 6022:
Network Architectures, Management, and Applications III
Kwok-wai Cheung; Gee-Kung Chang; Guangcheng Li; Ken-Ichi Sato, Editor(s)

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