2014•Unpublished venueRequires access
The Constrained Application Protocol (CoAP)
Z. Shelby, Klaus S. Hartke, Carsten Bormann
Open publisher page 2,554 citations
Abstract
The Constrained Application Protocol (CoAP) is a specialized web
transfer protocol for use with constrained nodes and constrained
(e.g., low-power, lossy) networks. The nodes often have 8-bit
microcontrollers with small amounts of ROM and RAM, while constrained
networks such as IPv6 over Low-Power Wireless Personal Area Networks
(6LoWPANs) often have high packet error rates and a typical throughput
of 10s of kbit/s. The protocol is designed for machine- to-machine
(M2M) applications such as smart energy and building automation. CoAP
provides a request/response interaction model between application
endpoints, supports built-in discovery of services and resources, and
includes key concepts of the Web such as URIs and Internet media
types. CoAP is designed to easily interface with HTTP for integration
with the Web while meeting specialized requirements such as multicast
support, very low overhead, and simplicity for constrained
environments.