The number of IoT devices is growing at high speed, around 18 billion devices are forecast by 2022. Many of these devices are implemented with simple hardware, with low specifications and low resources. Taking into account the limited hardware resources and the huge network formed by IoT devices, CoAP was born as a lighter application protocol than HTTP. One important task for this scenario is the congestion control of huge networks using simple hardware devices. CoAP implements a simple congestion control solution, but many research articles show that this solution is not very efficient and it could be improved using other congestion control algorithms. CoCoA was born with the aim of being the standard congestion control algorithm for CoAP and has been proven through many studies, that it improves CoAP default performance in several scenarios. However, some research articles show that CoCoA offers low performance in bufferbloat scenarios. This thesis evaluates CoCoA in bufferbloat scenarios and introduces changes on CoCoA algorithm, achieving an improvement on its performance
