sensornetworks are becoming an important part of the IT landscape. Existing systems, however, are limited in two fundamental ways: lack of data independence, and poor integration with the higher layers of the data pr...
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sensornetworks are becoming an important part of the IT landscape. Existing systems, however, are limited in two fundamental ways: lack of data independence, and poor integration with the higher layers of the data processing chain. In this paper we present SwissQM, a nextgeneration architecture for sensornetworks built to address these two limitations. SwissQM combines a virtual machine at the sensors with a powerful gateway as access point to the system. The flexibility of SwissQM opens up the doors to sensornetworks with richer functionality, data model independence, optimised performance, and smooth integration into the rest of the architecture. SwissQM supports adaptability (e.g., push down strategies), multiple users and applications, high query turn-around, extensibility (e.g., user defined functionality), and optimised use of resources. The paper describes SwissQM, the features it provides, and examples of its use.
nextgeneration network (NGN) is IP based broadband and integrated network of existing communicationnetworks. This paper defines requirements of management information to perform resource admission and path computati...
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ISBN:
(纸本)9780977565740
nextgeneration network (NGN) is IP based broadband and integrated network of existing communicationnetworks. This paper defines requirements of management information to perform resource admission and path computation for single-phase resource control scheme in NGN transport stratum. We also propose high-speed resource control mechanism based on parallel and single-phase scheme to minimize delay overhead between centralized resource admission control functions and transport functions.
The 15 papers in this special issue focus on traffic engineering for multi-layer networks. The papers can be roughly divided into the following three groups: 1) New Approaches to Traffic Engineering, 2) Multi-layer Su...
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The 15 papers in this special issue focus on traffic engineering for multi-layer networks. The papers can be roughly divided into the following three groups: 1) New Approaches to Traffic Engineering, 2) Multi-layer Survivability, and 3) Specific Issues. Some of the specific issues include optimal topology design, multicast flow aggregation, load balancing, traffic grooming, and Ethernet-based technology.
A large-scale sensor network often requires a network wide group key for confidentiality of control messages and data reports. The group key should be updated when a certain sensor node is compromised by adversaries i...
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ISBN:
(纸本)9781424406135
A large-scale sensor network often requires a network wide group key for confidentiality of control messages and data reports. The group key should be updated when a certain sensor node is compromised by adversaries in a hostile environment. However, key update messages will consume much energy during hop-by-hop delivery to each sensor nodes. In this paper, we propose a new group key management scheme which minimizes communication overhead of rekeying messages. To achieve this goal, we first give detailed analysis of communication overhead of the existing logical key tree scheme. Then we present the topological key hierarchy scheme which explicitly considers sensor network topology during key tree generation. We show that our scheme can drastically reduce communication overheads of the tree based group key management in wireless sensornetworks.
This paper presents the use of remote software download, upgrade, memory backup and restoration processes to improve operational efficiencies of NG-OTN. Network Element requirements, test results in a multi-vendor env...
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This paper contributes to this effort by introducing a new framework for moving data from a sink to the user at a low cost and power, using the Universal Mobile Telecommunication System (UMTS), which is standard for t...
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In this paper, we propose an algorithm to realize a power-aware network topology in wireless sensornetworks. The algorithm creates a multicast tree connecting all sensor nodes. In the multicast tree, a sink node shou...
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ISBN:
(纸本)9780769530482
In this paper, we propose an algorithm to realize a power-aware network topology in wireless sensornetworks. The algorithm creates a multicast tree connecting all sensor nodes. In the multicast tree, a sink node should be a root node, and all the data sensed in the sensor nodes are transferred to the sink node using the tree connection. The relay nodes aggregate the received data, and transfer the aggregated data to the sink at an appropriate timing so as to avoid packet collisions. To do this, all the sensor nodes are grouped in clusters. Here, each cluster has a head node, which is automatically selected from among the nodes in the cluster. In addition, our algorithm has an autonomous mechanism that can change the cluster head dynamically based on the remaining energy of each sensor node and the communication quality among the sensor nodes, which are obtained by periodical information exchange between the sensor nodes. This mechanism contributes to extending the lifetime of the sensor network. After describing the algorithm, some experimental results are shown to prove its effectiveness and robustness.
The IEEE 802.15.4 Medium Access Control (MAC) protocol is designed for low data rate, short distance and low power communication applications such as Wireless sensornetworks (WSN). However, in the standard 802.15.4 M...
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ISBN:
(纸本)9781424402656
The IEEE 802.15.4 Medium Access Control (MAC) protocol is designed for low data rate, short distance and low power communication applications such as Wireless sensornetworks (WSN). However, in the standard 802.15.4 MAC, if the remaining number of backoff periods in the current superframe are not enough to complete data transmission procedure, the sensor nodes hold the transmission until the next superframe. When two or more sensor nodes hold data transmission and restart the transmission procedure simultaneously in the next superframe, it causes a collision of data packets and waste of the channel utilization. Therefore, the MAC design is inadequate to deal with high contention environments such as densely deployed sensornetworks. In this paper, we propose a data fragmentation scheme to increase channel utilization and avoid inevitable collision. Our proposed scheme outperforms the standard IEEE 802.15.4 MAC in terms of collision probability and aggregate throughput. The proposed scheme is easily adapted to the standard IEEE 802.15.4 MAC without any additional message types.
To enable new context-aware applications and services in future communication systems, wireless sensornetworks (WSNs) are required to capture the context surrounding the service user and service related objects. This...
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ISBN:
(纸本)9781424415014
To enable new context-aware applications and services in future communication systems, wireless sensornetworks (WSNs) are required to capture the context surrounding the service user and service related objects. This paper introduces a novel configurable architecture for a WSN system that is able to deliver context information from the sensors to the user in different application environments, and allows its efficient integration into third generation (3G) mobile communication systems in particular into the IP multimedia subsystem (IMS). The proposed architecture offers significant advantages compared to the ZigBee architecture.
The Internet and IP technology have become the modern amenities, and are expected to become ICT infrastructure to support the future ubiquitous digital society. However, they show several vulnerabilities at present. H...
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The Internet and IP technology have become the modern amenities, and are expected to become ICT infrastructure to support the future ubiquitous digital society. However, they show several vulnerabilities at present. Hence nextgeneration lifeline and new digital business/revenue creation can be established by deploying dependable ICT systems. This paper focuses on the concept designs of dependable networks, these architecture and emerging technologies. And new business creation is another aspect. Network-based new services/businesses can survive if and only if the network dependability is guaranteed. This topic is discussed as business model schemes in this paper. We also discuss antinomy relations between dependability and "ease-of-use," and open issues such as the social consensus.
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