We present Chequery, a novel query processing framework that brings together model checking approaches and query processing techniques for sensor networks. In addition to its expressiveness, Chequery provides sound me...
详细信息
ISBN:
(纸本)9784907764319
We present Chequery, a novel query processing framework that brings together model checking approaches and query processing techniques for sensor networks. In addition to its expressiveness, Chequery provides sound mechanisms available to sensor networks' administrators for building their data management-oriented tasks.
the proceedings contain 48 papers. the topics discussed include: design of an analog-digital PI controller with gain scheduling for laser tracker systems;one modification of the cusum test for detection early structur...
ISBN:
(纸本)9789898111326
the proceedings contain 48 papers. the topics discussed include: design of an analog-digital PI controller with gain scheduling for laser tracker systems;one modification of the cusum test for detection early structural changes;recursive bias-compensating algorithm for identification of dynamical bilinear systems in the errors-in-variables framework;asymptotic theory of the reachable sets to linear periodic impulsive control systems;identification of multi-dimensional system based on a novel criterion;synthesis method of a PN controller using forbidden transitions sequences;path planning using discretized equilibrium paths;a framework for distributed and intelligent process control;model based design of networked embedded systems - a modeling approach using FlexRay as an example;and real-time systems safety control considering human machine interface;and sliding mode control - is it necessary sliding motion?.
Data gathering is a common but critical operation in many applications of wireless sensor networks. Innovative techniques that improve energy efficiency to prolong the network lifetime are highly required. Clustering ...
详细信息
ISBN:
(纸本)9780769530994
Data gathering is a common but critical operation in many applications of wireless sensor networks. Innovative techniques that improve energy efficiency to prolong the network lifetime are highly required. Clustering is an effective topology control approach in wireless sensor networks, which can increase scalability and lifetime. these networks require robust wireless communication protocols that are energy efficient and provide low latency. In this paper, we develop and analyze an efficient cooperative transmission protocol with robust clustering (RCCT) for sensor networks that considers a fault-tolerant and energy-efficient distributed clustering with minimum overhead. RCCT distributes energy load by energy-aware member selection for cooperative data transmission. Simulation results show a better performance of RCCT as compared to the conventional protocols.
When a sensor network is deployed in the field it is typically required to support multiple simultaneous missions, which may start and finish at different times. Schemes that match sensor resources to mission demands ...
详细信息
ISBN:
(数字)9783540691709
ISBN:
(纸本)9783540691693
When a sensor network is deployed in the field it is typically required to support multiple simultaneous missions, which may start and finish at different times. Schemes that match sensor resources to mission demands thus become necessary. In this paper, we consider new sensor-assignment problems motivated by frugality, i.e., the conservation of resources, for both static and dynamic settings. In general, the problems we study are NP-hard even to approximate, and so we focus on heuristic algorithms that perform well in practice. In the static setting, we propose a greedy centralized solution and a more sophisticated solution that uses the Generalized Assignment Problem model and can be implemented in a distributed fashion. In the dynamic setting, we give heuristic algorithms in which available sensors propose to nearby missions as they arrive. We find that the overall performance can be significantly improved if available sensors sometimes refuse to offer utility to missions they could help based on the value of the mission, the sensor's remaining energy, and (if known) the remaining target lifetime of the network. Finally, we evaluate our solutions through simulations.
Energy dissipation is focused in energy constraint communication systems such as in Wireless sensor networks, which depends on both channel conditions and communication protocols. Assuming in stop-and-wait ARQ (automa...
详细信息
ISBN:
(纸本)9781424421077
Energy dissipation is focused in energy constraint communication systems such as in Wireless sensor networks, which depends on both channel conditions and communication protocols. Assuming in stop-and-wait ARQ (automatic request for repeat) protocols on Rayleigh fading channel, in this paper, we derive eqs. (1) to (5) and then establish a model of transmission energy dissipation for per payload bit. By computer simulation, we obtain Fig. 1, Fig. 2 and Fig. 3. Results in these Figs. show that, for specified frame header length and frame error rates (FER), there exists the optimal frame length for the lowest energy dissipation and then this optimal frame length is determined If the payload length is equaled to the frame header length in bits. On the other hand, for given optimal frame lengths, there exist the optimal frame error rate for the lowest energy dissipation although it is approximately 0.65. Furthermore, boththe optimal frame length and the optimal frame error rate are not related to each other.
Multimedia Broadcast/Multicast Service (MBMS) allows a common broadcast channel to be shared by users interested in identical content. We explore the problem of enhancing MBMS resilience by repairing packets lost duri...
详细信息
ISBN:
(纸本)9781424423910
Multimedia Broadcast/Multicast Service (MBMS) allows a common broadcast channel to be shared by users interested in identical content. We explore the problem of enhancing MBMS resilience by repairing packets lost during broadcast. Since MBMS broadcast consumes expensive 3G resources, we leverage the ubiquity of multi-homed mobile devices i.e., devices having both cellular and ieee 802.11 wireless interfaces. We thus accomplish out-of-band repair of MBMS packet losses through an ad-hoc, peer-to-peer 802.11-based network. A fundamental challenge in scheduling repair transmissions is handling interference between distributed nodes. We present DiCoR, a fully distributed protocol for CPR. Our protocol does not assume any a priori knowledge of the network topology or peer losses, and is resilient to dynamic network changes due to node mobility or the continuous joining and leaving of peers. Detailed simulation experiments, under realistic loss models and network conditions, demonstrate that DiCoR presents a viable solution for timely out-of-band loss repair of MBMS real-time broadcast.
Micro Eelectro Mechanical systems (M-EMS) technology has developed considerably in recent years and many sensors utilizing this technology are available in the market. MEMS technology enables miniaturization, mass pro...
详细信息
ISBN:
(纸本)9784907764319
Micro Eelectro Mechanical systems (M-EMS) technology has developed considerably in recent years and many sensors utilizing this technology are available in the market. MEMS technology enables miniaturization, mass production, and cost reduction of many sensors. In particular, MEMS inertial sensors that include an acceleration sensor and an angular velocity sensor (gyroscope, or simply "gyro") are the most popular devices. Applications of inertial sensors have now extended into the field of networked sensing systems. In this presentation, we will describe current MEMS inertial sensors and their applications.
In mobile sensor networks, the mobility of nodes leads to frequent changes of network topology, therefore the communication links between source nodes and Sink vary dynamically. the Receiver-based Routing protocols do...
详细信息
the proceedings contain 92 papers. the topics discussed include: design and performance of optimized relay mappings;distributed STBC with relay subset selection for single carrier relay-assisted transmissions;adaptive...
ISBN:
(纸本)9781424423927
the proceedings contain 92 papers. the topics discussed include: design and performance of optimized relay mappings;distributed STBC with relay subset selection for single carrier relay-assisted transmissions;adaptive route configuration for increased energy efficiency in wireless sensor networks;effect and optimization of burst assembly algorithms for video traffic transmissions over OBS networks;impact of burst assembly on TCP performance in hybrid wireless/OBS networks;a novel photonic switch architecture based on optical codes for optical burst switched networks;dimensioning of combined OBS/OCS networks;efficient mapping of VoIP traffic in wireless OFDMA systems using semi-fixed allocations;FFth deployment taking off in Europe;and improvements in the transmission over optical links of broadband access networks.
this paper presents schemes to generate effective feature vectors of low dimension, and also presents a cluster-based algorithm, where sensors form clusters on-demand for the sake of running a classification task base...
详细信息
ISBN:
(纸本)9784907764319
this paper presents schemes to generate effective feature vectors of low dimension, and also presents a cluster-based algorithm, where sensors form clusters on-demand for the sake of running a classification task based on the produced feature vectors. the features generated through our proposed schemes are evaluated using K-Nearest Neighbor (k-NN) and Maximum Likelihood (ML) classifiers. the proposed schemes are effective In terms of classification accuracy, and can even outperform previously proposed approaches, but, in addition, they are also efficient in terms of communication overhead.
暂无评论