Synchronization in PON as Mobile Backhaul Network
Jianfeng Zhou · Lund reports on atomic physics · 2013
In order to meet the ever-increasing demand for bandwidth and reducing the Operational Expense (OpEx), mobile backhaul networks are evolving from circuit-switched networks to packet-switched or IP networks. Passive Optical Network (PON) is one of many transport technologies deployed in mobile backhaul network. PON as mobile backhaul network has lots of advantages, such as providing very large bandwidth and reducing OpEx. however, clock synchronization is a critical issue that has to be addressed, since base stations (BSs) within the network has to be synchronized in order to provide high Quality of Service (QoS) to customers. This thesis is devoted to investigating the feasibility of using Precision Time Protocol (PTP or IEEE 1588v2) to provide Time-of-Day (ToD) distribution in PONs as mobile backhaul networks. The main motivation to use IEEE 1588v2 is to reduce the number of and dependence on high-cost Global Positioning System (GPS) devices installed in hundreds of thousands of mobile base stations around the world. In this thesis factors impacting on the time accuracy using this protocol are quantitatively analyzed, and a model of implementing the protocol in EPON system is designed and simulated. From the simulation results, the time accuracy that the protocol can achieve in EPON system is also presented. (Less)