提出了一种利用光突发交换(OBS)技术组建WDM多波长光环网的新颖方案,称为"虚同步光突发环"——VS-OBR,该方案将数据信道划分为定长的数据突发时隙(DBS),并通过一种弹性偏置时间控制机制(ROTC)保持DBS与控制波长信道中的突发控制标签(BCL)的关联关系,实现数据信道上无冲突和丢失的媒质接入控制(MAC).对该方案中偏置时间调整代价、最大饱和吞吐率和时延等性能进行的理论分析和仿真研究表明VS-OBR不仅可行而且带宽利用率高.
A new method to build a WDM multi-wavelength optical ring with Optical Burst Switching(OBS) technology is proposed,which is named as 'Virtual Synchronized Optical Burst Ring'(VS-OBR).In VS-OBR the data channels are divided into length-fixed Data Burst Slots(DBS),and to achieve a confliction-free and lossless data channel Media Access Control(MAC) scheme,these DBSs are kept in correspondence with the Burst Control Label running in the control channel through a Resilient Offset-Time Control mechanism.The bandwidth penalty of ROTC adjustment,maximum throughput under saturated load and delay performances are analyzed using theoretical and simulation methods,showing the feasibility and high bandwidth efficiency of VS-OBR.