Tag Archive: 'ns3 project'
Low power sensor networks with communication enabled by WiFi are expected to be widely deployed. A major challenge is collecting event-driven uplink data from a large number of low-power sensors with low latency. In WiFi, the access point (AP) typically polls nodes individually to schedule uplink transmission times, resulting in a large latency. In this paper, we […]
We consider the problem of distributed detection of a mean parameter corrupted by Gaussian noise inwireless sensor networks, where a large number of sensor nodes jointly detect the presence of a weak unknown signal. To circumvent power/bandwidth constraints, a multilevel quantizer is employed in each sensor to quantize the original observation. The quantized data are transmitted […]
Though the size of the system is getting larger towards exa-scale computation, the amount of available memory on computing nodes is expected to remain the same or to decrease. Therefore, memory efficiency is becoming an important issue for achieving scalability. This paper pointed out the problem of memory-inefficiency in the de-facto standard parallel programming model, Message Passing Interface (MPI). To solve […]
Validation of ad hoc network mobility models almost depends on simulation. However, most of the widely used models are currently very simple and they focus on the ease of implementation rather than soundness of establishment. As an outcome, simulation based mobility models are often randomly generated movement patterns. Various simulators are available to mimic the movement of wireless nodes […]
In recent years, the range of sensing technologies has expanded rapidly, whereas sensor devices have become cheaper. This has led to a rapid expansion in condition monitoring of systems, structures, vehicles, and machinery using sensors. Key factors are the recent advances in networkingtechnologies such as wireless communication and mobile ad hoc networking coupled with the technology to integrate devices. Wireless sensor networks (WSNs) can […]
Cloud and enterprise application integration (CEAI) is a new challenge as more enterprise applications migrate successfully to cloud environments. However, achieving CEAI properties such as multitenancy, cloud-level scalability, and environmental heterogeneity is nontrivial for enterprise applications originally built under the assumption of centralized management. A concrete implementation of the cloud service bus approach, called JTangCSB, addresses the […]
Content downloading from vehicles is becoming increasingly popular, but it also meets challenges dueto the limited number of road-side units (RSUs) and the expensive cost of 3G/LTE downloads. Cooperative LTE + vehicle-to-vehicle (V2V) downloading schemes can significantly improve the efficiency and reduce costs. However, selfish users are motivated to minimize their own LTE downloading costs, so they would […]
Directional and pairwise measurements are often used to model interactions in a social network setting. The mixed-membership stochastic blockmodel (MMSB) was a seminal work in this area, and its ability has been extended. However, models such as MMSB face particular challenges in modeling dynamicnetworks, for example, with the unknown number of communities. Accordingly, this paper proposes adynamic infinite mixed-membership stochastic blockmodel, […]
Internet routing scalability issue is one of challenges of future Internet architecture. The global routing table is inflating with the growing number of networks connected to the Internet and the more-specific prefixes from multi-homing and traffic engineering operation requirements. Many engineering solutions have been proposed. In this paper, we propose a scalable routing architecture in a long-term intention for […]
In recent years, with the improvement of the high speed communication infrastructure, P2P content distribution systems have been attracting more attention. In a P2P content distribution system, the lack of a central management server provides the system its robustness. However, it also leads to problems in content reliability and accessibility. We propose a secure content distribution system […]
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