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This paper concentrates on the nonlinear filtering for systems with event-triggered data transmission and random time delays. A stochastic event-triggered sensor schedule is introduced to reduce the excessive measurements, which achieves a lower communication rate with a good estimation performance. The time delay is modeled by a Poisson distribution, and a D-length buffer is used to retrieve partly...
In order to reduce the end-to-end delay in duty-cycle MAC protocols of Wireless Sensor Networks (WSNs), the pipeline-forwarding technique has been proposed. According to this technique, sensor nodes along the forwarding path are scheduled with sequential wakeup time slots. Even though the previous pipeline-forwarding protocols such as P-MAC and PRI-MAC showed a good result in term of reducing end-to-end...
As the rapid development of big data applications, more and more data analytics are based on geographically distributed data centers. Recent works mainly focus on task and data placement to reduce data transmission among these geodistributed data centers. In this paper, we argue that the task execution delay may also impact the response time, especially in the hot-spot data centers. We define geo-distributed...
To increase the number of successful accesses for machine-to-machine (M2M) communication, we propose a new random access (RA) procedure. The proposed RA procedure allows evolved NodeB (eNB) to know the preamble collisions in the first step by attaching user equipment (UE) identity information in physical random access channel (PRACH). This improvement prevents eNB from scheduling physical uplink shared...
By way of reducing the active time of sensor nodes, this paper proposed an energy efficient data convergence model which is adaptable for cold chain application. The model runs on hierarchical wireless sensor network architecture, which aims at finding an optimal sleep/wake up schedule that can coordinate the data sending time slot for both cluster nodes and routing nodes. It can avoid data re-transmission...
Duty cycling improves energy efficiency but limits throughput and introduces significant end-to-end delay in wireless sensor networks. In this paper, we present a traffic-adaptive synchronous MAC protocol (TAS-MAC), which is a high throughput low delay MAC protocol tailored for low power consumption. It achieves high throughput by using Time Division Multiple Access (TDMA) with a novel traffic-adaptive...
An On-demand Scheduling Cooperative MAC protocol (OSC-MAC) is proposed to address the energy hole problem in multi-hop wireless sensor networks (WSNs). By combining an on-demand strategy and sensor cooperation intended to extend range, OSC-MAC tackles the spatio-temporal challenges for performing cooperative transmission (CT) in multi-hop WSN: cooperating nodes are neither on the same duty cycle nor...
In wireless sensor networks, sensor data messages are transmitted to a sink node by using wireless multihop transmission with help of intermediate sensor nodes. In event-based sensor networks, no or few sensor data messages are transmitted in usual and burst sensor data messages are required to be transmitted when a sensor detects occurrence of a certain event. It may cause congestion along a multihop...
Communication scheduling is a crucial cause of interfering networked control stability. For data communication network triggered by event, time delay and packet dropout induced by scheduling policy is analyzed; quadratic performance criterion is computed under various timing conditions based on Continuous linear-quadratic-Gaussian theory; data packet is dropped voluntarily in collision of sending...
In this paper the distribution-design and query-processing problems for distributed databases on local multiaccess computer networks are studied. The broadcast capability of these networks allows information to be distributed efficiently. In the distribution-design problem, the distribution of independent files are studied. With the broadcasts of updates, the distribution of multiple copies of a single...
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