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Internet of Things (IoTs) is gaining increasing significance due to real-time communication and decision making capabilities of sensors integrated into everyday objects. Predicting performance in IoTs is critical for detecting performance bottlenecks, designing optimal sleep/wake-up schedules and application-aware performance tuning. However, performance prediction becomes a significant challenge...
IEEE 802.15.4e Time Slotted Channel Hopping (TSCH) standard has gained a lot of attention within the Industrial Internet of Things research community due to its effectiveness in improving reliability and providing ultra-low power consumption for industrial applications, and in which its communication is orchestrated by a schedule. Despite its relevance, the standard leaves out of its scope in defining...
This article describes the design and implementation of an electronic prototype of high availability, that would facilitate the residential Internet user to have and evaluate using an interface graphic description highly reliable and detailed network parameters as bandwidth is proposed, delay, jitter, throughput and service downtime without using a commercial network manager. This way you could make...
In this paper, we propose a low complexity algorithm to separate collided RFID signals. By carefully analyzing the collided signals when two tags with the same bit durations respond to a reader simultaneously, we observed that the individual amplitudes of each tag appear in pairs and the two tags' information bits are different, and regular RFID signals with larger amplitudes appear if the two tags'...
With the rapid development of multi-media services, the multi-media traffic flows make the load in wireless mesh network (WMN) increase sharply, which incurs network congestion. In the context of having multiple multicast sessions, the load-balance and interference-aware (LBIA) routing algorithm is proposed by considering the intra-flow interference, inter-flow interference and load balance. This...
Although many works exist on the subject, the real impact of partially-overlapping channels (POCs) on the capacity of multi-radio wireless mesh networks is not clearly established yet. In this paper, we propose a mathematical programming model to evaluate accurately the improvement in throughput that could be achieved if all the adjacent radio channels were exploited. Compared to previous works, our...
Energy Efficiency is an important feature in poor-covered areas where not only the access to a cellular network is scarce but also energy sources are limited. In this paper, we consider a wireless mesh network to act as a local backhaul network to cover rural and remote villages. The shortage of energy in these settlements motivates to optimize the energy consumption of the wireless backhaul network...
Context adaptive binary arithmetic coding (CABAC) is the entropy coding tool applied in the latest video coding standard, High Efficiency Video Coding (H.265/HEVC). CABAC achieves high coding efficiency but involves the bin-to-bin data dependency of Binary Arithmetic Encoder (BAE). This paper proposes a range updating structure with pre-bitwise-NOT (PBN) operation to shorten the critical paths in...
In distributed OpenFlow controller networks, the network flow is managed by set of associated rules that are maintained by switches in their local Ternary Content Addressable Memory (TCAM) and rules are made by concerned controllers, which are local to domains. However, TACM is expensive and consumes high power. The switch inside the forwarding plane has limited TCAM space and is infeasible to maintain...
Future small-cell networks using the millimeter-wave (mmW) band to provide backhauling or user access need for adequate and innovative simulation tools in order to optimize the pre-deployment design and thus reduce installation and post-deployment optimization costs. The proposed paper makes some recommendations on the inputs and simulation blocks required for the mmW small-cell design. A particular...
Airports and their terminal airspaces are key choke points in the air transportation system causing major delays and adding to pollution. A solution aimed at mitigating these chokepoints integrates the scheduling of runway operations, flight release from the gates and ramp into the airport movement area, and merging with other traffic competing for downstream airspace points. Within this integrated...
NASA is collaborating with the FAA and aviation industry to develop and demonstrate new capabilities that integrate arrival, departure, and surface air-traffic operations. The concept relies on trajectory-based departure scheduling and collaborative decision making to reduce delays and uncertainties in taxi and climb operations. The paper describes the concept and benefit mechanisms aimed at improving...
Adaptive video streaming techniques were introduced to enable high quality video delivery over HTTP. These schemes propose to choose dynamically the appropriate video rate to match the operating conditions. In home networks, wireless access is the predominant Internet access. Multiple clients/players with different link qualities compete over a limited wireless bandwidth to transfer their video streams...
The increase of wireless devices due to the implementation of wireless sensor networks, cyber-physical systems with wireless communication interfaces and mobile monitoring as well as the installation of diagnosis applications into the shop floor improves real-time transparency of machine conditions and production processes. For a minimal invasive integration of such technologies into the brownfield...
Vehicular mesh networks can be used to carry Internet data traffic for mobile users. We use data from a real vehicular network that is operating in Portugal to estimate the relationship between network throughput and offered load of Internet traffic, quantity of vehicles, quantity of infrastructure and the use of Request-to-Send/Clear-to- Send (RTS/CTS) handshaking. We show that achievable throughput...
Passive optical network (PON) has become the vital technology for the next generation access networks. The advancement of optical technology extends the span of the PON from 20 to 100 km. Such an extended PON is known as Long-Reach PON (LR-PON). But the data transmission in the existing LR-PONs suffer from longer propagation delays between the optical line terminal (OLT) and optical network units...
We propose a novel algorithm for channel assignment in wireless body area networks. The proposed approach is based on the machine learning sub-domain known as reinforcement learning, and is named reinforcement learning — channel assignment algorithm (RL — CAA). RL — CAA interacts with the environment in an unsupervised way and selects the optimal frequency channel for the wireless sensor nodes. RL-CAA...
In this paper, we propose a TCP congestion window (CWND) tuning scheme which considers the resource allocation information of satellite link and the number of sessions. The proposed scheme sets TCP congestion window size by using satellite resource allocation information exchanged between TCP and the link layer and the number of session. To evaluate the performance, we implemented the proposed scheme...
Due to the tremendous increase in traffic demand, current mobile access and backhaul networks face a capacity problem. To increase the capacity, one can deploy many small cells, which may be dynamically powered on where traffic demand arises. As a consequence, the backhaul network for dense small cell deployments needs to cope with the massive increase in user demands but rolling out fiber to each...
Smart Grid components by nature, are spread over geographical locations, with generation points and consumption locations distributed and spread out on large areas, it is obvious that there is a need for a proper management of location intelligence. Location intelligence provides information essential for smart, efficient and self-healing systems. For upper management, it provides information used...
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