Date Added: Oct 2011
Machine-To-Machine (M2M) communications refers to the ability of devices to communicate with each other without human intervention. Arguable the more industrial branch of the emerging Internet of Things (IoT), where objects are anticipated to connect to the Internet and tweet or being queried, it has some very stringent requirements on reliability, low-power and often delay. With cellular M2M today still being relatively power hungry, they concentrate in this paper on capillary M2M which is often also the more cost efficient solution. Capillary M2M systems however are known to suffer from poor reliability and unbounded delay. To this end, they argue for a communication stack composed of latest IEEE and IETF protocols, which allows meeting the stringent requirements.