HOWBAN中支持降级服务的共享保护算法

Degraded-service aware shared-path protection algorithm in hybrid optical-wireless broadband access networks

针对光无线混合宽带接入网(HOWBAN)的特点提出一种支持降级服务的共享保护算法(DS-SPP)。依据用户请求的连接可用性、带宽需求和降级带宽程度,选择备用ONU并分配降级备用带宽,然后通过前端无线网状网(WMN)重路由受影响业务。仿真结果表明:DS-SPP算法可以大大降低备用ONU和无线路由器上备用资源的预留量,进一步提高网络的资源利用率。

Based on the characteristics of hybrid optical-wireless broadband access networks （HOWBAN）, a degraded-service aware shared-path protection algorithm （DS-SPP） has been proposed in this paper. With a comprehensive consideration of connection availability, bandwidth demand and degraded-service for different network users, DS-SPP chooses backup ONUs with less reservation of backup bandwidth. And then it reroutes the affected traffic from the work ONU to the backup ONU through the front wireless mesh network （WMN）. The simulation results show that, DS-SPP reserves less backup ONU capacity and wireless router capacity and has a higher primary-backup capacity ratio.