EPON和WiMAX融合架构下带宽分配和调度机制的研究

以太网无源光网络(EPON)和IEEE 802.16(WiMAX)的融合网络在固定移动混合接入网中被认为是很有前景的接入方式.文中提出了3种WiMAX无线网络与EPON网络系统融合架构,融合系统同时具有光网络的高带宽和无线网络的灵活性.为了在接入网中支持QoS,本文为融合结构提出了一种动态带宽分配算法(DBA)和调度机...

Research on the advanced dynamic bandwidth allocation and scheduling scheme under the convergence network of EPON and WiMAX

The integration of Ethernet Passive Optical Network （EPON） with IEEE 802.16 （WiMAX） is regarded as a promising access solution in realizing ？xed mobile convergence （FMC） networks. In this article we proposed three broadband access architectures to integrate EPON and WiMAX technologies.The integrated architectures can take advantage of the bandwidth benefit of fiber communications, and the mobility of wireless communications. We propose a dynamic bandwidth allocation （DBA） and scheduling scheme for the integrated architecture in the access network to support quality of service （QoS）. Combining the medium access control （MAC） of both IEEE 802.3ah and IEEE 802.16, the proposed QoS-based Dynamic Bandwidth Allocation （QDBA） for EPON can offer efficient operation and minimize the packet delay. Furthermore, the proposed queue-based scheduling scheme for base station can provide call admission control to serve classified traffic. The simulation results demonstrate that the proposed scheme enhances performance in terms of drop probability, average queue length and average end-to-end packet delay, respectively.