Night-Watch: Cooperated Low Power Operation of Container Security Devices

摘要

The purpose of this paper is to describe a cooperated low power operation, Night-Watch mechanism. The Night- Watch mechanism reduces useless channel scanning of the container security device (CSD) based on IEEE 802.15.4. In order to reduce energy consumption of the device, the Night- Watch mechanism uses the specific feature that a CSD moves as a group with other CSDs. The CSD alters its mode based on the environmental changes around it. Most of the CSD operate as a low power mode, and only a few of CSDs monitors all channels of IEEE 802.15.4 instead of other CSDs. To maximize the lifetime of all CSDs, CSDs change its role with each other. A key contribution of this mechanism is the decrease in power consumption with its simplicity. The CSD doesn't manage other CSDs and only uses its environmental information. The simplicity provides maximum flexibility to apply to system and reduces the overhead in entire system.