Cyclic polling-based dynamic wavelength and bandwidth allocation in wavelength division multiplexing passive optical networks  

作　　者：谢正程 李慧 纪越峰 

机构地区：[1]Key Laboratory of Optical Communication and Lightwave Technologies,Ministry of Education, Beijing University of Posts and Telecomnunications

出　　处：《Chinese Optics Letters》2009年第4期344-347,共4页中国光学快报（英文版）

基　　金：supported by the National "973" Program of China (No. 2007CB310705);the National Natural Science Foundation of China (Nos. 60772024, 60711140087);the National "863" Program of China (No. 2007AA01Z255);the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT0609);the International Science and Technology Cooperation Project of China (No. 2006DFA11040);the 111 Project of China (No. B07005).

摘　　要：Cyclic polling-based dynamic wavelength and bandwidth allocation algorithm supporting differentiated classes of services in wavelength division multiplexing （WDM） passive optical networks （PONs） is proposed. In this algorithm, the optical line terminal （OLT） polls for optical network unit （ONU） requests to transmit data in a cyclic manner. Services are categorized into three classes： expedited forward （EF） priority, assured forwarding （AF） priority, and best effort （BE） priority. The OLT assigns bandwidth for different priorities with different strategies. Simulation results show that the proposed algorithm saves a lot of downstream bandwidth under low load and does not show the light-load penalty compared with the simultaneous and interleaved polling schemes.Cyclic polling-based dynamic wavelength and bandwidth allocation algorithm supporting differentiated classes of services in wavelength division multiplexing （WDM） passive optical networks （PONs） is proposed. In this algorithm, the optical line terminal （OLT） polls for optical network unit （ONU） requests to transmit data in a cyclic manner. Services are categorized into three classes： expedited forward （EF） priority, assured forwarding （AF） priority, and best effort （BE） priority. The OLT assigns bandwidth for different priorities with different strategies. Simulation results show that the proposed algorithm saves a lot of downstream bandwidth under low load and does not show the light-load penalty compared with the simultaneous and interleaved polling schemes.

关 键 词：BANDWIDTH Multiplexing equipment Optical materials Passive networks Switching networks Telecommunication networks Wavelength division multiplexing 

分 类 号：TN929.1[电子电信—通信与信息系统]