In the near future, IP-based wireless sensor networks will play a key ro le in several application scenarios such as smart grid, smart ho me, healthcare, and building automat ion... An IPv6 routing protocol is expected to provide internet connectivity to any IP-based sensor node. In this paper, we propose IRPL protocol for IP-based wireless sensor networks. IRPL protocol uses a combination of two routing metrics that are the link quality and the remain ing energy state of the preferred parent to select the optimal path. In IRPL protocol, we combine t wo metrics based on an alpha weight. IRPL protocol is implemented in ContikiOS and evaluated by using simu lation and testbed experiments. The results show that IRPL protocol has achieved better network lifetime, data delivery rat io and energy balance co mpared to the traditional solution of RPL protocol.

A solution for water factories in Vietnam using automatic meter reading technology is proposed in this paper. The water meters and water quality meters for water factories in Vietnam have been designed and prototyped. Water meters differ from conventional meters in that they record the water consumption and communicate that information back to the water suppliers for monitoring and billing without the need for manual readings. Water quality meters monitor multiple parameters relating to water quality such as pH, electroconductivity, temperature, etc., and transmit these parameters to a server via GPRS network. Therefore, customers and water suppliers can monitor the water consumption, water quality parameters from anywhere via the Internet. This project has been conducted in a water factory located in Thai Nguyen Province, Vietnam. The results have shown that the consideration of this solution has been operated well in the real condition in Vietnam.

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