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RPL协议被认为是主流的物联网路由协议,其性能与目标函数有着密切关系。本文将详细分析不同目标函数对RPL在网络组建时间、能耗、包投递率、包时延和路由控制开销等性能方面的影响。实验数据显示,目标函数对RPL包时延影响较小;在可靠性方面,采用MRHOF的RPL要优于采用OF0的RPL,但前者要付出较高的代价,如较高的路由控制开销与能耗等。最后给出了目标函数研究建议。
The RPL protocol is considered as the mainstream IoT routing protocol, and its performance is closely related to the objective function. This article will analyze in detail the impact of different objective functions on the performance of RPL such as network setup time, energy consumption, packet delivery rate, packet delay and routing overhead. Experimental results show that the objective function has little effect on RPL packet delay. For reliability, RPL using MRHOF is better than RPL using OF0, but the former has to pay a higher price, such as higher routing control overhead Consumption and so on. Finally, the research proposal of the objective function is given.