%A Bandarupalli Rakesh and H. Parveen Sultana %T A Review on Enhanced Routing Solutions in RPL Protocol %0 Journal Article %D 2021 %J Int J Performability Eng %R 10.23940/ijpe.21.11.p4.938945 %P 938-945 %V 17 %N 11 %U {https://www.ijpe-online.com/CN/abstract/article_4637.shtml} %8 2021-11-30 %X Internet of Things is drawing the attention of researchers due to its wide range of applications in emerging areas. To support interoperability in IoT, IETF has proposed 6LoWPAN. Due to the hardware limitations of IoT devices, it is presenting a lot of challenges mainly related to the routing. To address the issues in routing, IETF has proposed the Routing Protocol for Low-power and Lossy Networks (RPL). In the RPL protocol, an acyclic graph is constructed to exchange the data in between nodes. The RPL protocol is widely used in different applications. Even though the RPL protocol is used in various applications, there are several drawbacks and limitations that have been exposed by recent studies. Researchers have proposed several new solutions to address these issues. This paper discusses the limitations of the RPL protocol in routing the data and solutions proposed by different researchers as well as drawbacks of the proposed methodologies by various researchers.