Ammar Muthanna

Analytical Evaluation of D2D Connectivity Potential in 5G Wireless Systems

Constantly growing number of wireless devices leads to the increasing complexity of maintenance and requirements of mobile access services. Following this, the paper discusses perspectives, challenges and services of 5th generation wireless systems, as well as direct device-to-device communication technology, which can provide energy efficient, high throughput and low latency transmission services between end-users. Due to these expected benefits, the part of network traffic between mobile terminals can be transmitted directly between the terminals via established D2D connection without utilizing an infrastructure link. In order to analyse how frequently can be such direct connectivity implemented, it is important to estimate the probability of D2D communication for arbitrary pair of mobile nodes. In this paper, we present the results of the network modelling when the random graph model is used. The model was implemented as a simulation program in C# which generates random graph with a given number of vertexes and creates the minimal spanning tree (mst) by using the Prime’s algorithm. All our result and practical findings are summarized at the end of this manuscript.

Development of Intelligent Core Network for Tactile Internet and Future Smart Systems

One of the main design aspects of the Tactile Internet system is the 1 ms end-to-end latency, which is considered as being the main challenge with the system realization. Forced by recent development and capabilities of the fifth generation (5G) cellular system, the Tactile Internet will become a real. One way to overcome the 1 ms latency is to employ a centralized controller in the core of the network with a global knowledge of the system, together with the concept of network function virtualization (NFV). This is the idea behind the software defined networking (SDN). This paper introduces a Tactile Internet system structure, which employs SDN in the core of the cellular network and mobile edge computing (MEC) in multi-levels. The work is mainly concerned with the structure of the core network. The system is simulated over a reliable environment and introduces a round trip latency of orders of 1 ms. This can be interpreted by the reduction of intermediate nodes that are involved in the communication process.

Comparison of protocols for Ubiquitous wireless sensor network

Ubiquitous Sensor Networks (USN) are the technological basis for the concept of the Internet of Things. Many applications of the Internet of Things provides for the creation of USN with different density of nodes placement. This leads to the necessity of comparing the USN routing protocols and select a particular protocol for the construction of the sensor network, depending on this density. The article compared AODV and RPL protocols and defined areas of their application in building USN. Results show that RPL is more suitable for networks with high density of nodes.

User performance gains by data offloading of LTE mobile traffic onto unlicensed IEEE 802.11 links

Today, one of the most engaging challenges for mobile operators is the question how to manage the data traffic in mobile networks which is increasing exponentially; mainly due to the growing popularity of applications for mobile devices. Mobile data offloading represents the idea of cost-efficient technology to release the overloaded parts of RAN in cellular networks. This emerging solution introduces the concept of offloading the mobile data from primary cellular communication technology to the IEEE 802.11 infrastructure with aim to gain extra capacity (higher throughput) and improve the overall network performance and user experience. The strategy what, when and for how long to offload data from one communication system to another is non-trivial and therefore already active research in this domain should continue to find the answers for open questions. This paper addresses two the most discussed solutions for offloading between the LTE cellular network and WiFi when the performance needs/requirements exceed the threshold for providing the services via LTE network under an agreed-upon QoS (Quality of Services). In detail, the implementation of SNR (Signal-to-Noise Ratio) threshold based handover and network throughput based handover solutions following the 3GPP standard for Access Network Discovery and Selection Function framework for WiFi offloading in simulation environment NS-3 is proposed. Our simulation results confirm that the concept when the SNR and throughput thresholds can be used to control the mobile data offloading process.

Suitability of MANET Routing Protocols for the Next-Generation National Security and Public Safety Systems

One of new domains where the D2D communication can be applied is the Public Protection and Disaster Relief (PPDR) and National Security and Public Safety (NSPS) services. The key requirement for employing the PPDR and NSPS services is to provide the access to the communication services even if cellular network is highly overloaded or become fully dysfunctional due to some public disaster or emergency situations. In such case, the most important task is to share emergency information between citizens even when most of them do not have infrastructural connectivity. Since D2D is by default a single-hop communication, it is crucial to find the mechanism how to transmit any data via randomly assembled network even for longer distances. Therefore, this paper focuses on the utilization of MANET routing protocols for D2D communication in case that the connection to the cellular network is down. The selected routing protocols used in MANET are described and their suitability is verified in the simulation environment Network Simulator 3 (NS-3).

Interaction of the IoT Traffic Generated by a Smart City Segment with SDN Core Network

The main purpose of this article is to test IoT management system based on SDN core network, as well as interaction IoT traffic with SDN-switches. To conduct investigation of management system and network infrastructure behavior we carried out several IoT traffic tests, which were generated based on partnership project oneM2M specification. In this work, we considered “Smart city” model for Central district of Saint-Petersburg (Russia). During the testing of the network infrastructure were identified several parameters such as number of simultaneously supported sessions by the Mikrotik switch using different transport protocols, was proposed a recommendation for dynamically changing virtual buffers. During the testing of the IoT management system, we define reliability of IoT data management service for determined equipment in traffic conditions of the “Smart City”. Also, we estimate relationship between RTT parameter using various IoT protocols and heterogeneous traffic in conjunction with “Smart city” segment in SDN network. In order to investigate the influence of the SDN network on the RTT traffic parameter of a large number of IoT and the condition of its transmission in conjunction with heterogeneous traffic in the network, a full-scale experiment was conducted on the developed model, which in turn reflected a possible distribution scheme of a certain monitoring and control system for the Central District Saint-Petersburg. The aim of the study is also to consider the possibility of implementing the IoT data management service as a central management system for monitoring urban ecological parameters in a dense buildings environment.

Analysis and Performance Evaluation of SDN Queue Model

In this paper, we present an Openflow-SDN based network visualization and performance evaluation model that helps in network designing and planning to examine how networks’ performance will be affected as the traffic loads and network utilization change. To achieve the aimed goal, as a research method, we used AnyLogic Multimethod simulation tool. This is a first of its kind where SDN performance evaluation is based on queuing model simulation to monitor change of average packet processing time for various network parameters. Using presented in this work SDN model, network administrators and planners can better predict likely performance changes arising from traffic variation. This allows them to make prompt decisions to prevent seemingly small issues from becoming major bottlenecks.

The mixed telemetry/image USN in the overload conditions

The Internet of Things (IoT) is a new concept for telecommunication development. The IoT and things determinations are considering in accordance the ITU-T recommendations. The Ubiquitous Sensor Network (USN) is one of the general IoT components. The traffic models for such network are the important field of research presently. The mixed telemetry/image USN behavior in the overload conditions is the investigation goal of this paper. This investigated USN is multi-application network with AODV (Ad Hoc On Demand Distance Vector) signaling protocol. The paper results show that the USN efficiency can reduce in the overload conditions likely the same effect for the PSTN and NGN networks.

Intelligent core network for Tactile Internet system

Tactile Internet requires a round trip latency of 1ms, which considered being the main challenge with the system realization. Forced by recent development and capabilities of the fifth generation (5G) cellular system, the Tactile Internet will become a real. One way to overcome the 1ms latency is to employ a centralized controller in the core of the network with a global knowledge of the system together with, the concept of network function virtualization (NFV). This is the idea behind the software defined networking (SDN). This paper introduces a Tactile Internet system structure which employs SDN in the core of the cellular network and mobile edge computing (MEC) in multi-levels. The system is simulated over a reliable environment and introduces a round trip latency of orders of 1 ms. This can be interpreted by the reduction of intermediate nodes involved in the communication process.

Remote networking technology for IoT: Cloud-based access for AllJoyn-enabled devices

The Internet of Things (IoT) represents a vision of a future communication between users, systems, and daily objects performing sensing and actuating capabilities with the goal to bring unprecedented convenience and economical benefits. Today, a wide variety of developed solutions for IoT can be seen through the all industry fields. Each of the developed systems is based on the proprietary SW implementation unable (in most cases) to share collected data with others. Trying to offer common communication platform for IoT, AllSeen Alliance introduced Alljoyn framework - interoperable platform for devices (sensors, actuators, etc.) and applications to communicate among themselves regardless of brands, transport technologies, and operating systems. In this paper, we discuss an application for remote management of light systems built as an extension of Alljoyn Framework - developed application is independent on communication technologies (e.g., ZigBee or WiFi). Besides provided communication independence, the presented framework can run on both major SoC architectures ARM and MIPS. To this end, we believe that our application (available as open source on GitHub) can serve as building block in future IoT / Smart home implementations.