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This paper represents a survey of the existing research in the domain of intelligent question routing. The survey starts from an original presentation paradigm that generalizes the essence of approaches found in the open literature. The presentation paradigm includes three basic processing stages related to the three major problems of system implementation. Various research efforts use different approaches...
Although commonly used sensor nodes are resource-limited devices, enabling cooperation among these devices can help building very powerful systems. Besides other characteristics, storage capabilities of individual sensor nodes have to be considered as this might be very small compared to the collected sensor data. The temporal availability of sink nodes or the importance of collected data are not...
This paper expands on the demand-wise shared protection model in order to capacitate a network that achieves pre-defined minimum availability requirements. By enabling DSP to take into consideration minimum availability, a network can be capacitated to meet user's requirements of the network. This provides a way to customize the level of protection throughout the network that matches the needs of...
The availability requirements placed on core communication networks have been rapidly increasing. As the value of the traffic served by these core networks has increased so has the impact of failure. Demand-wise shared protection (DSP) was developed to provide failure survivability in the network that was more efficient than concurrently routing two paths of traffic (1+1 APS), yet was more straightforward...
Support of P2P communities in mobile environments is a challenging task. To this purpose numerous algorithms have been recently proposed to speed up resource search throughout the network. Among these, structured DHT approaches seem very promising since they allow for a successful resource search by keeping complexity low. One of these techniques denoted as Georoy, was recently proposed with the aim...
Multihoming has been broadly employed by large enterprises, and stub networks to augment the availability and reliability of their Internet access. In this technique, the edge network is connected to the Internet through multiple upstream Internet Service Providers (ISPs) rather than one. Thus far, different aspects of multihomed networks have received intensive attention in the research community...
This paper develops reliable distributed publish/subscriber algorithms with service availability in the face of concurrent crash failure of up to delta brokers. The reliability of service in our context refers to per-source in-order and exactly-once delivery of publications to matching subscribers. To handle failures, brokers maintain data structures that enable them to reconnect the topology and...
6LoWPAN is a low-power wireless personal area network and a technique to apply TCP/IP stack to sensor networks. By installing IPv6 stack to the sensor node, the sensor networks have interoperability with the external IPv6 network. To solve the 6LoWPAN's restrictions, IETF working group recently published problems, IPv6 header compression, and routing mechanism requirement documents through their study...
Most location service approaches for mobile ad hoc network rely on one static server or number of mobile servers distributed over the network area. These approaches suffer from servers' failures which cause out-of-date information and hence, using expired location information of the service. In this paper, a solution of such failures is presented through an adaptive server availability mechanism....
Web services are gaining momentum as a major vehicle to deliver business functionalities on the Web. More and more business organizations have begun to use Web services to facilitate user interactions and the collaboration among themselves. This essentially forms a large service space, which still keeps growing. Meanwhile, there may be functionality overlaps among different service providers. The...
This paper shows packet delivery rate can be improved by adopting learning-based hybrid routing strategies when a wired network suffers from severe link disruption. The dynamics of the link disruptions complicate the routing problem; successful and stable routing operations of conventional routing approaches are hindered as the level of disruption increases. The target is to develop a robust and efficient...
In recent years, there are substantial demands to reduce packet loss in the Internet. Among the schemes proposed, finding backup paths in advance is considered to be an effective method to reduce the reaction time. Very commonly, a backup path is chosen to be a most disjoint path from the primary path, or in the network level, backup paths are computed for all links (e.g., IPRFF). The validity of...
Reliable storage of large amounts of data is always a delicate issue. Availability, efficiency, data integrity, and confidentiality are some features a data backup system should provide. At the same time, corporate computers offer spare disk space and unused networking resources. In this paper, we propose an intrusion-tolerant cooperative backup system that provides a reliable collaborative backup...
Peer-to-Peer (P2P) systems gained popularity and are responsible for a large share of today's Internet traffic. Nevertheless, their dynamic nature and the intended lack of control through central instances make their behavior unpredictable and, therefore, it is difficult to achieve a high level of Quality-of-Service for P2P traffic. Thus, peers are themselves responsible for dealing with these issues...
Load balance in P2P storage system will affect availability greatly. Two aspects should be considered in keeping balance: balance in peer space and balance in data replica among peers. This paper focuses on achieving balance in peer space. Peers are categorized by periodicity of availability, and long term peers are organized into virtual balanced binary tree which is improved from P-Grid. Character...
Modern high-performance computing applications use large scale simulations to facilitate scientific discovery, such as studying the impact of sub-atomic interactions or searching for a cure for diseases. These applications increasingly use data that is growing exponentially in size. Thus, management of data at high performance computing (HPC) centers is a critical problem, and addressing data-related...
In distance vector routing [4,7, 9, 10] each router collects and forwards the information from and to the neighbors. It was the original ARPANET routing algorithm and use in the Internet under the RIP [2]. The methodology of collecting and broadcasting the routing related information initiates the problems i.e. (1) two-node loop instability, (2) three-node loop instability and (3) count-to-infinity,...
This study proposes a long lived routing method which is also based on associativity such as ABR (associativity based routing) for real time applications. The main purpose of our work is improving the ABR algorithm in order to reduce the outage of the nodes and decreasing the number of reconstructions required to keep the nodes in communication. The performance of ABR is compared with other long-lived...
A conditionally Poissonian power-law random graph with infinite degree variance is considered as a random network model. A method for elegant analytical computation of accurate approximations for various network characteristics is introduced, based on slight redefinition of the model in terms of non-homogeneous Poisson point processes and on the replacement of certain random variables by their expectations...
Survivability is a key concern in modern network design. This paper investigates the problem of survivable dynamic connection provisioning in general telecom backbone networks, which are mesh structured. We assume differentiated services where connections may have different availability requirements, so they may be provisioned differently with protection (if needed) based on their availability requirements...
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