Communication in Cyber-Physical Systems

This paper discusses the aspects concerning the communication between the components of cyber-physical systems (CPSs). The characteristics and the requirements concerning the transfer of information within CPSs and the related open issues are presented. In this context, a CPS solution for environmental monitoring (temperature and relative humidity), based on the IEEE 802.11 b/g standards, was developed and is presented as a case study. This consists in the use of Wi-Fi sensors that have the ability of connecting to an existent Wireless LAN and of a server that provides access to data which can be recorded at any place where IEEE 802.11 b/g network coverage exists, from any device connected to the Internet.