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In this paper, the problem of positive observer design of linear positive systems is studied. This paper aims to providing new design approaches for positive observers of linear positive systems. First, an efficient continuous-time positive observer design approach is proposed by using linear programming such that the observer error system is exponentially stable. Then, the results are also extended...
This paper investigates the leader-following consensus problem for general linear multi-agent systems with time-varying delay. An observer-based distributed triggering mechanism is proposed to solve this problem. For each agent, the update of the designed distributed event-triggered controller only requires the knowledge of its neighbors' states at its own event time instants. A sufficient condition...
This paper is concerned with the optimal Markov jump linear filter problem for Markov jumping parameter system with multi-channel observation delays and packet losses, where the jumping parameters are assumed to be known up to the present time. Firstly, by defining an equivalent delay-free observation sequence, the optimal jumping filter problem is transformed into the one of delay-free system which...
We propose a new two-stage energy-saving scheme allocating the idle time of one ONU's transceiver to other ONUs based on downstream and upstream matching and dividing ONUs into two categories which adopt different energy-saving modes according to their traffic. The simulation results show that proposed scheme can reduce the power consumption and delay of ONUs.
This paper is to investigate the linear minimum mean square error estimation for Markovian jump linear systems subject to unknown Markov chain modes, multi-channel observation delays, and data losses. Firstly, the original system is transformed into an extended system by defining a new state variable. The new state variable is concerned with the indicator function of the Markov chain and the original...
Priority scheduling is a fundamental tool to provide service isolation for different jobs in shared clusters. Ideally, the performance of a high-priority job should not be dragged down by another with a lower priority. However, we show in this paper that simply assigning a high priority provides no isolation for jobs with dependent computations. A job, even receiving the highest priority, may give...
Cluster scheduler serves as a critical component to data-parallel systems in datacenters. Ideally, a scheduler should provide predictable performance with guarantees on the maximal job completion delay, while at the same time ensuring the minimal mean response time. Practically however, performance predictability and optimality are often conflicting with each other. The results often are a plethora...
A broadband channel sounder measurement campaign was conducted to investigate the ship-to-ship propagation channel in the C-band at 5.2 GHz with a signal of 120 MHz bandwidth. This paper presents details of the measurement campaign. Two scenarios with two vessels in rough sea conditions that either follow or drive towards each other are presented. First results in terms of power delay profile and...
Passive optical network (PON) deployment requires significant capital and operational costs for operators to provide high network capacity and significant geographic coverage. Network sharing is desirable for operators to reduce the investment needed to deploy and operate PON networks. In this paper, we introduce a bandwidth resource sharing framework for XG-PONs among multiple operators. In this...
In this paper, we construct an analytical design framework for energy efficient scheduling for delay-constrained spectrum aggregation (ESSA), where the practical hardware limitations on SA capability bring various technical challenges. Specifically, the conventional water-filling power control cannot be adopted over all the channels, and the delay-aware scheduling solution should interact with the...
In this paper, we address adaptive predictor feedback design for a simplified drilling system in the presence of disturbance and time-delay. The main objective is to stabilize the bottomhole pressure at a critical depth at a desired set-point directly. The stabilization of the dynamic system and the asymptotic tracking are demonstrated by the proposed adaptive control, where the adaptation employs...
Recent cloud datacenter network usually has multiple transmission paths for any pair of servers to increase the aggregate bandwidth and to improve the robustness of failure recovery. Therefore, Multipath TCP (MPTCP) is becoming one of the most important transport protocols exploring the multipath resource to improve the performance of cloud network. It is obvious that MPTCP could significantly increase...
In this paper we motivate the need for a broadband wireless link over sea. Besides higher data rate, shorter latency and high reliability of the communication link will have a substantial impact on the success of telematic applications. For example hybrid ships need a continuous control of their batteries. Autonomous ships require a ultra-reliable and a high data throughout of the wireless channel...
Compared to conventional control systems, network control system has advantages in lower installation costs and easier maintenance. Regarding computer control, a design for network control system is proposed based on CAN (Controller Area Network). Through optimizing the design of the network adapter, computer centralized control algorithm can be applied to a simple network control. After analyzing...
In this paper, we consider a network where an access point (AP) wirelessly transfers energy to user equipments (UEs) and UEs use the harvested energy to communicate with the AP. Due to different radio propagation losses, the UEs far from the AP harvest little but consume much, thus suffering high transmission delay, while the UEs close to the AP has redundant energy. To reduce the average delay, we...
This paper is to develop a new distributed estimation technique for linear systems with network induced delays and packet dropouts. A set of random variables are utilized to model the random delay phenomena occurring in the channels from the system to the sensors. And the consensus weights are assumed to be known. A distributed sub-optimal filter is presented by minimizing an upper bound on a quadratic...
Content-Centric Networking (CCN) proposals rethink the communication model around named data. In-network caching and multipath routing are regarded as two fundamental features to distinguish the CCN from the current host-centric IP network. In this paper, we tackle the problem of joint collaborative caching and multipath routing in CCN. We achieve this with an online and offline combination caching...
A robust closed-loop iterative learning control (ILC) method is proposed in this paper for industrial batch processes with input delay subject to time-varying uncertainties. By introducing a novel two-dimensional (2D) state observer for predicting the augmented closed-loop 2D system states to describe batch operation characteristics, only measured outputs of current and previous cycles are used for...
In this paper, a distributed adaptive output feedback control scheme is proposed to solve output consensus regulation problem of multi-agent systems with parameter uncertainties and loss of effectiveness type of actuator faults. We suppose that i) only a subset of the subsystems can access the desired set value directly, ii) the communication conditions among all the subsystems are represented by...
In this paper, we propose a novel channel impulse response (CIR) clustering algorithm using a sparsity-based method, which exploits the feature of CIR that power of multipath component (MPC) is exponentially decreasing with increasing delay. We first use a sparsity-based optimization to recover CIRs, which can be well solved by using reweighted L1 minimization. Then a heuristic approach is provided...
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