Adaptive Traffic Shaping Policy Based on Token Bucket Algorithm of Wireless-optical Broadband Access Network
WANG Ruyan CHI Wenxiang ZHANG Hong
(School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications,Chongqing 400065, China)
(Key Laboratory of Optical Communication and Networks, Chongqing 400065, China)
There are mismatches of transmission rates and different service classifications between optical domain and wireless domain in Wireless-Optical Broadband Access Network (WOBAN). To improve the QoS of the integration network and make full use of network resources, a new algorithm based on token bucket traffic shaping policy is proposed. According to the service mapping rules and scheduling of EPON and WiMAX, the selection of token bucket parameters B determined based on the relative service priority of the entire network. This paper also combines with more realistic self-similar network traffic to derive the best formula for token bucket parameters and then proposes a shared buffer strategy on the basis of the service priority. Furthermore, an adaptively dynamically adjust traffic shaping policy is obtained through the change of QoS metrics. The simulation results show that the proposed strategy can effectively reduce traffic shaping network equipment pressure while improving the QoS of whole converged networks.
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