Building Robust Wireless LAN for Industrial Control with the DSSS-CDMA Cell Phone Network Paradigm

Abstract

Abstract

Guaranteeing Proper-Temporal-Embedding safety rules in wireless CPS: A hybrid formal modeling approach

“…A wireless communication link from the base station to a remote entity is called a downlink; and a wireless communication link from a remote entity to the base station is called an uplink. We assume that there is no direct wireless communication links between any two remote entities (such practice is desirable for wireless applications with high dependability requirements [17], [18]). …”

Adapting a Main-Stream Internet Switch Architecture for Multihop Real-Time Industrial Networks

“…Many works [3], [4], [5] have pointed out that as distributed real-time industrial control systems scale up, single realtime local area network (LAN) is no longer sufficient to integrate their distributed subsystems; instead, we need realtime switches to merge the many real-time LANs into real-time wide area networks (WAN). For example, nowadays airplane control involves hundreds of processors and peripherals, which already exceeds the capacity of a single LAN.…”

“…Same thing is happening to advanced manufacturing [8], factory fieldbus [9], [10], [11], advanced medical equipment systems [12], [13], smart power grid [14], vehicular electronics [15] etc. Even for wireless industrial control, real-time switches are needed to build the multi-hop wired backbones to connect wireless base stations: as Alves et al [16], Willig et al [17], Pellegrini et al [18], and Wang et al [4] pointed out, wired backbone converging multiple (centralized) wireless LANs might be the (most) promising architecture for wireless industrial control.…”

Medical-Grade Quality of Service for Real-Time Mobile Healthcare

“…[4][5][6] WLANs are cost-effective and are the platform of choice in many hospitals. Cellular networks are inherently more expensive, but they offer broader coverage, are a proven infrastructure to support high mobility, and use licensed frequency bands to avoid interference from other networks.…”

“…These features make cellular technology a strong candidate for medical telemetry and other m-health applications. 4,5 To explore the practical concerns associated with selecting a cellular platform, we evaluated the QoS requirements of some key medical applications and then developed a wireless system architecture based on CDMA2000 1xEV-DO 7 cellular technology, which uses code-division multiple access (CDMA) and timedivision multiple access (TDMA) multiplexing to maximize throughput. Evolution-Data Optimized (EV-DO) is shorthand for a version of EV, a telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access.…”