CONTENTION AVOIDANCE SCHEME IN PCE-BASED WAVELENGTH-SWITCHED OPTICAL NETWORKS
In this paper, a new contention avoidance scheme called WSA (wavelength-weight statistic assignment) has been proposed for distributed lightpath establishment in PCE-based Wavelength-switched Optical Networks (WSON). WSA assigns a wavelength-weight to denote the concurrent reservation probability and source node can select several preferable wavelengths according to the weight with assistance of the Path Computation Element (PCE). A new three-level QoS shunt scheme (TQS) is used in intermediate node to deal with high wavelength weight, and the destination assigns the least collision probability wavelength according to the weight statistic. Simulations are conducted to compare WSA with SIR and DIR. The results show that WSA performs better in total blocking than the others under various traffic loads.
Path Computation Element WSON QoS wavelength assignment blocking probability
Lianxing Hou Huaipo Fu Dong Liu Mingang Cao Lin Zuo
Research Institute of Highway, Ministry of Transport, Beijing 100088, China Research Institute of Highway (RIOH), Transport Consultants Ltd, Beijing 100088, China
国际会议
北京
英文
332-335
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）