Dong Geun Yun

Battery life time extension method using selective data reception on smartphone

This paper proposes a battery life time extension method using selective data reception on smartphone according to the battery states of a smartphone. In proposed method, the battery state information of a smartphone is transmitted to the corresponding application server with keep-alive signaling or initial signaling message. The SNS application server determines whether the received data transmits to a smartphone by considering the data types (e.g, picture, video, text, etc.). Accordingly, the battery life time of a smartphone can be extended by avoiding the energy which is caused due to unnecessary data reception. Also, the proposed method can decrease unnecessary bandwidth usage and signaling data.

Agent-based user mobility support mechanism in RFID networking environment

In ubiquitous network environment, mobility is supported among various networks. When a user enjoying the media streaming service changes his attachment point, the service needs to be provided continuously. We propose a mechanism to provide seamless mobility for a user using RFID tag. We build a test bed for user mobility, and confirm that the seamless service can be provided according to the user movement.

Energy Saving Mechanism using sleep mode of processor in home gateway

Home gateway is in always-on state whether traffic flows or not and thus a waste of power is caused in case that any traffic does not flow. This paper proposes HGESM (Home Gateway Energy Saving Mechanism) which reduces energy consumption in home gateway. The proposed HGESM supports energy saving by switching or keeping processor mode according to the type of service (real time or non-real time service). We verify that the proposed HGESM has lower power consumption than the existing scheme.

A scheme on RFID networking system with security function

We propose a scheme for secure information networking on RFID system. We investigate a study on network agent function to give IP address at RFID tag and present a mechanism for secure information transmission.

The delay-guaranteed mechanism for providing real-time service in intergrated architecture of EPON and WiMAX

We propose the delay-guaranteed mechanism for providing real-time service in integrated architecture of EPON and WiMAX. For guaranteeing delay, when the value of delay related to the received real-time service exceeds the recommended value, the SS accesses adjacent different ONU-BS and receives real-time service via multi-path using both network interfaces. By using proposed mechanism, real-time service can be guaranteed and the bottleneck phenomenon incurred due to the difference of transmission speed between wired and wireless network can be alleviated.