CoAP over SMS: Performance evaluation for machine to machine communication

M2M devices can be deployed at various, often not easy to access locations like rural areas, high on the buildings or on moving vehicles. Mobile networks provide connectivity to such devices over the existing infrastructure. This paper presents an implementation and evaluation of the SMS for M2M communication by utilizing CoAP message semantics. The CoAP is a high-layer protocol that strives to become a standardized solution for M2M communication, and as such is interesting for related activities. The evaluation of regular, concatenated and multicast SMS transport shows that increased SMS traffic can lead to longer delivery time. This may not be a concern for M2M devices that are usually sensors with long sleeping cycles; but for other M2M scenarios that requires higher throughput, higher data rates can be achieved by agreeing over specific SLA with Service Provider.