Evaluating IEEE 802.15.4 for Cyber-Physical Systems

Xia, Feng; Vinel, Alexey; Gao, Ruixia; Wang, Linqiang; Qiu, Tie

doi:10.1155/2011/596397

Cited by 60 publications

(34 citation statements)

References 24 publications

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“…Previous performance evaluation [29] shows that the default parameters setting is inappropriate for most of applications. Hence, the key question to answer is whether a more appropriate parameter setting can solve the problem without introducing unacceptable side-effects.…”

Section: Approaches For Contention Access Periodmentioning

confidence: 99%

IEEE 802.15.4 Based Adaptive MAC Protocols

Xia

Rahim

2015

MAC Protocols for Cyber-Physical Systems

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WSANs provide the infrastructure for many applications of CPS. Lots of these applications use the IEEE 802.15.4 standard. However, it does not provide any means of differentiated services to improve QoS for time-critical and delay-sensitive events. A large amount of efforts have been made to address such issues. In this chapter, an overview on some interesting mechanisms used in existing adaptive and real-time protocols in compliance with IEEE 802.15.4 is presented. Careful examination of these research works reveals that by optimizing the original specifications and dynamically adjusting the protocol parameters, the total network efficiency can be significantly improved. Nevertheless, there are still certain challenges to overcome in pursuing the most appropriate protocol without introducing unacceptable side-effects. These standards have greatly encouraged to bridge the real-time physical world's applications/objects to cyber world for diverse range of time-critical applications. The communication and computing capabilities of cyber core are utilized to control/monitor real world's objects/applications. KeywordsThe performance of CPS depends upon QoS of the underlying network. In practice, applications' requirements vary in different environments. For example, in case of environmental surveillance, alarm packet should be prioritized as compared to normal data readings. In WBANs, life critical physiological readings should be delivered on time to the health services provider. However, IEEE 802.15.4 does not have such

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Section: Approaches For Contention Access Periodmentioning

confidence: 99%

IEEE 802.15.4 Based Adaptive MAC Protocols

Xia

Rahim

2015

MAC Protocols for Cyber-Physical Systems

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“…For the sake of simplicity, a NCS agent is considered as a linear discrete-time system. According to (2) and (3), the lth agent at the time instant 'k' is described as y c l,k+1 = Q l.k y c l,k + F l.k u l,k . Moreover, a ZOH event-triggered controller will hold the last received system state vector until a new output vector is received.…”

Section: Event-triggered Control Systemmentioning

confidence: 99%

“…This new type of system referred to as 'networked control system' (NCS) [1][2][3][4] renders enormous benefits such as saving installation cost, while increasing adaptability, reliability and usability. However, it also brings several challenging issues because of the presence of the packet switched communication network.…”

Section: Introductionmentioning

confidence: 99%

Stochastic adaptive event‐triggered control and network scheduling protocol co‐design for distributed networked systems

Sahoo

Jagannathan

2014

IET Control Theory & Applications

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In a distributed 'networked control system' (NCS), multiple physical systems or agents are connected to their corresponding controllers through a shared packet-switched communication network. For such distributed NCS, periodic sampled controller design is unsuitable to handle packet-switched closed-loop control systems and a novel stochastic optimal adaptive event-sampled controller scheme is proposed in the application layer for each physical system or agent expressed as an uncertain linear dynamic system. Lyapunov stability analysis will be utilised to derive the event trigger condition. In addition, a network scheduling protocol is also required for such NCS. Traditional network scheduling protocols are unsuitable for such NCS since the behaviour of the physical systems is disregarded during the protocol design. Therefore in this study, a novel distributed network scheduling protocol via cross-layer approach is developed to improve the performance of distributed NCS by minimising an overall system cost function which consists of the information collected from both the event-triggered controller for each physical system in the application layer and the distributed scheduling protocol from the network layer. It will be demonstrated that the proposed co-design approach will not only allocate the network resources efficiently but also it will improve the performance of the overall distributed NCS. Simulation results are included to demonstrate the effectiveness of the proposed cross-layer co-design.

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“…The channel bandwidth of IEEE 802.15.4 is 250 kbps [10]. Many WSNs adopt IEEE 802.15.4 for communicating among nodes.…”

Section: Set the Link Bandwidth To 250 Kbpsmentioning

confidence: 99%

Adaptive Network Coding Scheme for TCP over Wireless Sensor Networks

Chan

2013

INT J COMPUT COMMUN, Int. J. Comput. Commun. Control

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The purpose of this paper is to develop a network coding scheme to enhance TCP performance in wireless sensor networks. It is well known that TCP performs poorly over wireless links which suffer from packet losses mainly due to the bad channel. To address this problem, it is useful to incorporate network coding into TCP, as network coding can offer significant benefits in terms of throughput, reliability, and robustness. However, the encoding and decoding operations of network coding techniques will bring an additional delay that has a negative effect on applications of wireless sensor networks. In this paper, we propose an adaptive network coding (ANC) scheme which contains two major aspects: the adjustment of the redundancy factor R and the adjustment of the coding window size CW . We dynamically adjust these two parameters depending on the measured packet loss rate, so that the proposed ANC can effectively mask packet losses and reduce the decoding delay of network coding. The performance of our scheme is evaluated by simulations using NS-2 simulator. Compared to other schemes, the ANC not only achieves a good throughput but also has the lowest average delay and the lowest maximum delay in all experimental environments.

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Evaluating IEEE 802.15.4 for Cyber-Physical Systems

Cited by 60 publications

References 24 publications

IEEE 802.15.4 Based Adaptive MAC Protocols

IEEE 802.15.4 Based Adaptive MAC Protocols

Stochastic adaptive event‐triggered control and network scheduling protocol co‐design for distributed networked systems

Adaptive Network Coding Scheme for TCP over Wireless Sensor Networks

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