带宽按需分配业务及其实现

Bandwidth on Demand Service and Its Implementation

带宽按需分配(BOD)是最能体现自动交换光网络(ASON)特点和优势的一种业务。通过BOD,服务提供者按照用户需求提供可以使用的带宽。实现BOD业务过程中,使用通用成帧协议(GFP)实现数据帧到SDH虚容器的有效映射,同时使用虚级联(VC)和链路容量调整方案(LCAS)来进行带宽的动态绑定和调整,实现带宽无损调整;此外还可以设置自动触发带宽调整条件,通过ASON的智能化和自动化能力来完成带宽的自动调整,从而使网络能够提供快速、实时响应的BOD业务,满足用户动态、实时调整带宽的要求。

TBandwidth on Demand （BOD） is the most typical service to show the characteristics and advantages of the Automatically Switched Optical Network （ASON）. BOD enables the service provider to provide adequate bandwidth on user＇ s demand. To implement the BOD service, Generic Frame Protocol （GFP） is adopted to map the data frame to Synchronous Digital Hierarchy （SDH） virtual container. Meanwhile, Virtual Concatenation （VC） and Link Capacity Adjustment Scheme （LCAS） are used to dynamically bind and adjust the bandwidth, to realize bandwidth Iossless adjustment. Besides, by setting the automatic trigger conditions for bandwidth adjustment, the intelligent and automatic capabilities of ASON can be used to achieve dynamic bandwidth adjustment, thus providing users with quick and real-time BOD service.