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As a new generation of robot, lightweight flexible manipulator presents various applications in the field of advanced medical, modern industry, space and defense application, etc. Nowadays, these applications need control of flexible-link manipulator (FLM) from a distance, so the use of the network is essential for receiving the sensor signal and transmitting actuator signal. In this work, a new concept...
The development of telehaptic communication protocols has gained widespread focus over the past decade. Several protocols have been proposed for carrying out telehaptic activities over a shared network. However, a comprehensive analysis of the impact of the network crosstraffic on the telehaptic stream, and the feasibility of Quality of Service (QoS) compliance, is lacking in the literature. In this...
This paper develops a self-propelled Wi-Fi repeater for connecting between isolated LANs in Disaster. The authors implemented the self-propelled repeater, and evaluated the performance of it by experiment. From the results of experiment, authors confirmed the effectiveness of their repeater.
A variety of wireless communication links today, such as HSPA+ access in high speed trains, balloon-based aerial wireless networks and satellite Internet connections have high loss rates. In such environments, Multipath TCP (MPTCP) offers a robust solution compared to regular TCP. However, MPTCP and existing schedulers suffer from performance degradation for both constant bit rate (CBR) and bulk traffic...
The research on the future high-speed communication systems has already reached the critical point with better continuous transmission and higher system capacity especially for the on-board users in the high-speed trains. However, due to the inflexible architecture of current cellular networks where Internet access schemes served by multiple Internet Service Providers lack effective coordination,...
Device to device (D2D) communication in 5G is on the spurge to compensate for the exponential increase in mobile users and their data requirements. In D2D communication, proximity users can communicate and control the links among themselves without the need of base station. This brings a real challenge to model the network to incorporate uncertainty which arises due to the mobility of users. We have...
In this paper, the delta operator is applied to describe the networked control system with time-varying delay and random packet loss. A robust fault detection filter based on the observer is proposed to generate the residual signal, thus making the residual systems to be asymptotically stable and satisfy the H-infinity performance in delta domain. The parameters of the designed fault detection filter...
BBR is a recently proposed congestion control. Instead of using packet loss as congestion signal, like many currently used congestion controls, it uses an estimate of the available bottleneck link bandwidth to determine its sending rate. BBR tries to provide high link utilization while avoiding to create queues in bottleneck buffers. The original publication of BBR shows that it can deliver superior...
Recently, 5G systems started to explore the usage of mmWave bands both for access and backhaul. Cellular systems operating at such frequencies would achieve a significantly higher capacity than current systems due to the large frequency block available. Due to the propagation characteristics, highly directional mmWave links may frequently switch between Line-of-sight, Non Line-of-sight and outage...
A fuzzy codesign approach is proposed to deal with the controller — scheduler design for a networked control system which is physically distributed using a shared communication network. In the proposed approach, a fuzzy controller is applied to generate a control law for different sampling periods, the configuration supposes a strict actuation period vanishing the jitter. A neural uncertainty estimator...
Low Extra Delay Background Transport (LEDBAT) is defined in RFC6817 as a congestion control algorithm for lower than best effort transport service that reacts to both delay and loss congestion signals. LEDBAT allows bulk transfer applications (such peer-to-peer file transfer and software updates) to utilize available capacity in the background while limiting additional forward queuing delays at network...
In-network caching is an inherent feature of Named Data Networking (NDN), and the basic data unit of naming and caching in NDN is called “chunk”. However, a chunk needs to be further fragmented into fragments when its size is larger than the link layer's Maximum Transmission Unit (MTU). Furthermore, fragments also need to be reassembled into the original chunk at intermediate routers so that subsequent...
Wireless technologies have attracted the attention of the industrial sector, due to their multiple advantages such as ease of installation, flexibility and mobility. However, the application of wireless in industry is most limited to non-critical sensing applications, making the communication of critical instruments and control systems almost exclusively with wired media. Despite this, wireless technologies...
This paper considers the optimal linear quadratic control problem for network control systems(NCSs) with packet dropout and input delay. The optimal output feedback controller is derived for the first time which minimized the cost function. The separation principle, which often fails when the systems is with multiplicative noise, is proved to be established.
This paper investigates the event-triggered and self-triggered state feedback control for networked control systems (NCSs) with short network-induced delays and packet loss. First, we use a switched system model to describe such a system, which is prior to describe the uncertainty and the time-varying characteristics of the network-induced delays. Based on the switched system model, the co-design...
According to Forbes collected data, the public cloud services market will rise in 2016 and is expected to grow to $105 billions and, in fact, Virtual Machines (VMs) are one of the most popular tools for building “Cloud” services. But in service delivery such composition of multiple components greatly complicate analysis of product quality, especially if it is about Voice over IP (VoIP) set of services,...
The availability and reasonable cost of broadband Internet made it an attractive and favourable option to billions of users worldwide. Being a fast service also encourages its users to use real-time applications which is streaming and live data transfer includes VoIP and video streaming. The performance of such applications in Wireless Local Area Network (WLAN) may be highly affected by security protocols...
Many data center applications are latency-sensitive. Monitoring continuously the network latency and reacting to congestion on a network path is important to ensure that the applications performance does not suffer penalties. We show how to use the Precision Time Protocol (PTP) to infer network latency and packet loss in data centers, and we conduct network latency and packet loss measurements in...
The performance evaluation in the case of communication radio networks is different from that the single-link communication. The formation of complex heterogeneous communication networks due to the different levels of communication makes the lack of a unified and systematic assessment framework in terms of assessment principles, criteria, methods and evaluation index systems. According to the network...
Although, it was shown that NC is a promising technique to improve the throughput; especially for multicast environment; it also bears negative side-effects (e.g., high decoding delay). Since streaming video are usually subject to strict delay constraints, high decoding delay must be resolved to enhance the performance of the NC schemes. To overcome this issue, this paper presents a new scheme named...
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