Optimized Wireless Connectivity for CyberPhysical Systems with PublisherSubscriber Architecture Rapid advancements in communications technology accompanied by everincreasing computing power and webbased cyber universe pave the way to new hyperconnectivity concepts and solutions among persons and things. In terms of connectivity, the IEEE 802.11 Wireless Local Area Network (WLAN), commonly referred to as WiFi, has become a defacto standard solution for the lasthop network access due to its high data rate, low cost, and ease of deployment. In this paper, we present a fast, robust and reliable applicationspecific contextaware WiFibased connectivity framework to facilitate the expansion of new usecases in hyperconnected environments. We propose a configurable and flexible architecture for different network topology scenarios. The proposed solution dynamically exploits the presence of hierarchical infrastructure, adhoc andor broadcast mode. We will focus on Industry 4.0 CyberPhysical Systems (CPS) addressing a broad range of potential applications, with humans either included in or excluded from the control loop using publishersubscriber messageexchange architecture and ROS (Robot Operating System). Optimized wireless connectivity scenarios will be analyzed, providing latency, throughput and reliability evaluations. We will argue in which situations the conventional nonoptimized solutions would suffice over the newly proposed one. We evaluate and compare the efficacy of our solution on a carefully controlled, trafficshaped wireless testbed consisting of four nodes using a Commercial OffTheShelf (COTS) 802.11 hardware. The obtained experimental results validate the feasibility and effectiveness of our proposed solution and demonstrate its advantages over the conventional nonoptimized one.

Embedded systems for timexe2x80x93critical applications over WiFi: design and experimental assessment Networked embedded systems for industrial control based on wireless support provide several advantages over wired counterparts, but often reveal unsuitable for the most demanding industrial control applications, such as advanced manufacturing and cooperative robotics. Data exchange over IEEE 802.11 networks may theoretically represent an appropriate solution for timexe2x80x93critical applications, provided that unreliability and nonxe2x80x93 determinism issues are properly handled. In this respect, this paper hence proposes an original solution, based on a crossxe2x80x93 layer approach, to allow the realization of highxe2x80x93speed industrial controlxe2x80x93overxe2x80x93WiFi networked embedded systems. The proposal implements a novel robust framexe2x80x93delay state estimator, a time efficient communication policy, and a specific tuning of critical protocol parameters. Suitable hardwarexe2x80x93inxe2x80x93thexe2x80x93loop experiments have been carried out implemented exploiting two different embedded systems. Preliminary results show that the proposed architecture enables industrial control applications requiring a sampling rate of up to 1 kHz, even in presence of non negligible communication errors.