A delay-constraint routing metric based on ETX for RPL

作者：Zeng Bi; Jiang Bo; Cao Xiangyi; Liu Jianqi^*

来源：Revista de la Facultad de Ingenieria, 2017, 32(1): 873-884.

• ContikiOS
• Directed acyclic graph (DAG)
• Duty-cycling
• Expected transmission counts
• Internet engineering task forces
• Real time data transmission
• Routing metrics
• Wireless sensor network (WSNs)

IPv6 is a popular direction of the Wireless Sensor Networks (WSNs). The Internet Engineering Task Force (IETF) has been designated the Routing Protocol for Low power and Lossy networks (RPL) as the standard IPv6 routing protocol for WSNs. Routing metrics are used by RPL to build a Destination Oriented Directed Acyclic Graph (DODAG) as the network topology. And Expected Transmission Count (ETX) is a frequently-used routing metric for RPL. According to ETX, the Objective Function (OF) to be minimized is the expected total number of packet transmissions required to successfully deliver a packet to the ultimate destination. However, it does not take the Real-time data transmission into the account. In this paper, the ETX-D algorithm which based on ETX is proposed not only to keep the characteristics of ETX searching for reliable links but also to reduce the communication delay. Furthermore, combining the proposed algorithm with ant routing algorithm to reduce the delay of the topology rebuilt. ETX-D has been implemented based on ContikiOS and compared with the standard ETX. The experimental results have shown that ETX-D spends less time in transferring the message successfully.

• 出版日期2017