Sungchang Kim

Dual cyclic power saving technique for XG-PON.

In a passive optical network (PON), energy conservation is an important system design goal to satisfy the global demands for an energy efficient green network. In this paper, we show that a separate period control for the transmitter and receiver of an optical transceiver can result in better power saving performances in PON systems. Then, we propose a power saving mode called the Dual Cyclic Sleep (DCS) mode. We have implemented the DCS mode in an ETRI XG-PON system and conducted experiments to show the power saving efficiency of the proposed DCS mode. The results indicate that the DCS mode provides higher power saving efficiency than the doze and cyclic sleep modes.

Design of smart RN architecture for real time ODN management

Passive network elements such as splitter which compose ODN for PON provide advantages on the optical access network installation and management. However, as new customers for FTTH service are increasing, needs to manage ODN more intelligently is growing. In this paper, we introduce about Smart RN(Remote Node) and design its architecture. To gather the data about branching and connection information from Smart RN, we have employed CoAP protocol to consider constrained computing environment. And we design the Smart Connector and patch code based on RFID technology to get branching and connection information. Finally, we introduce scenarios about Smart RN usages.

Analysis of upstream link bandwidth utilization in GPON with integrated network surveillance

We present a media access control protocol extension to integrate the physical layer surveillance concept into the transmission and the related management system in the Gigabit-capable passive optical network (GPON). We allocate an unused time slot for network surveillance depending upon its availability in the upstream GPON transmission convergence frame. We analyze the upstream link bandwidth utilization of the GPON system with network surveillance and show that there is a negligible amount of underutilization of link bandwidth as a result of this.

GPON upstream link utilization analysis with integrated network surveillance

We integrate physical layer surveillance concept into management system of GPON by allocating an unused time slot for network surveillance depending upon its availability in upstream GTC frame and analyze the link bandwidth utilization.