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Cross-layer design is a suitable approach that can address some of throughput challenges for future multimedia applications. In this regard, effective capacity concept offers a suitable metric to assess the implications that physical layer design may have on link layer performance. However, most reported studies in this aspect consider the case of downlink scenario for convenience multiple input multiple...
State synchronisation in clustered Software Defined Networking controller deployments ensures that all instances of the controller have the same state information in order to provide redundancy. Current implementations of controllers use a strong consistency model, where configuration changes must be synchronised across a number of instances before they are applied on the network infrastructure. For...
In this paper, we consider a cognitive satellite-terrestrial network where the satellite communication operates in the microwave frequency bands allocated to terrestrial networks in an underlay mode. Taking the statistical delay quality-of-service (QoS) requirements into account, we investigate the effective capacity of the satellite network while satisfying interference-power limitations imposed...
In this paper, we consider the utilization of TV White Spaces (TVWS) by small Cognitive Radio (CR) wireless network operators (SCWNO) to support the communication needs of various smart grid and internet of things (IoT) applications. Spectrum leasing could be essential for SCWNO to support a wide range of applications. In our paper, we assume that in order to ensure Quality of service (QoS) requirements,...
In recent years, there have been significant efforts to standardize a routing protocol for Low-power and Lossy Networks (LLNs). This effort has culminated in standard IPv6 routing protocol for LLNs (RPL). The main interest of RPL is to improve routing in an LLN minimizing the usage of network resources. For this, RPL builds acyclic graphs and applies an Objective Function (OF) which is responsible...
Heterogeneous small cell network is a promising technique in the next generation mobile communications. Many works have been studied in small cells, including resource allocation and interference mitigation, but most studies didn't consider the quality-of-service (QoS) and power consumption. This paper focuses on the power allocation based on non-cooperative scheme to mitigate the interference and...
With Network Function Virtualization (NFV), network functions are deployed as modular software components on the commodity hardware, and can be further chained to provide services, offering much greater flexibility and lower cost of the service deployment for the network operators. At the same time, replacing the network functions implemented in purpose built hardware with software modules poses a...
Software-Defined Networking (SDN) can be applied for managing application flows dynamically by a logically centralized SDN controller and SDN switches. Because SDN switch only support a few thousand installations of a forwarding rule per second, its poor performance becomes a bottleneck for dynamic and scalable application flow management. For this reason, reducing the number of flows is needed to...
Recent standardization activities bring high Quality of Service (QoS) and predictability to Internet of Things (IoT), which are “going industrial”. Critical applications such as industrial process control, smart grid or vehicle automation require deterministic transmissions with properties such as on-time data deliveries and end-to-end reliability close to 100%. Traditional radio technologies based...
In software defined networks, control plane is decoupled from data plane and is directly programmable. Network controller retrieves an integrated view of data plane and thus an End-to-End (E2E) QoS guarantee is easier to realize than classic network paradigms. Deterministic Network Calculus (DNC) is a network analysis tool to provide a deterministic delay or bandwidth bound. In this proposal, an E2E...
This paper presents a novel hybrid ant colony optimization approach (ACO&CM) to solve quality of service (QoS) multicast routing problem. The main feature of this hybrid algorithm is to hybridize the solution construction mechanism of the ACO with cloud model (CM). Moreover, the hybrid algorithm considers both solution diversification and solution quality, and it adopts cloud model to avoid excessive...
In the LTE EPC, many network entities and interfaces have to be maintained and updated regularly. Moreover, to accommodate more users, new hardware must be integrated, although rarely used. To address these challenges, the EPC can be moved to the cloud using two modern technologies: SDN and NFV. In this paper, we study the impact of integrating these novel technologies on LTE networks. We propose...
An increasing number of online services are hosted on public clouds. However, since a centralized cloud architecture imposes high network latency, researchers suggested moving latency sensitive applications, such as virtual and augmented reality ones, to the edge of the network. Nevertheless, little has been done for edge layer capacity estimation resulting in a great need towards practical tools...
Mesh networks provide natural link and node fault tolerance and load balancing characteristics. However, existing solutions for real-time flow allocation seldom utilize those advantages. This paper deals with the real-time flow allocation problem in mesh networks. The objective is to find the suitable path under delay constraint while allowing load balancing. For this purpose, combined online flow...
Software Defined Networking and Network Function Virtualisation provide significantly more flexibility and control when provisioning QoS for delay sensitive services. Network delay can have a detrimental impact on VoIP quality and, therefore, minimising delay can help maintain the quality and prevent call dropping. This paper proposes a queuing scheme based on packet delay for prioritising VoIP calls...
Quality of Experience (QoE) management is a prime topic of research community nowadays as video streaming, online gaming and security applications are completely reliant on the network service quality. Moreover, there are no standard models to map Quality of Service (QoS) into QoE. HTTP media streaming is primarily used for such applications due to its coherence with the Internet and simplified management...
The wireless mobile networks (WMNs) are nowadays faced to several challenges such as the guarantee of quality of service (QoS) in the presence of multiple constraints specific to the wireless communication environments. The limited energy of the different nodes is one of these constraints which constitute the main source of the connectivity breaks within the network. Such breaks when repeated may...
This paper proposes an efficient interactive model for sensor-cloud integration to enable the sensor-cloud to provide on-demand sensing services for multiple applications with different latency requirements at the same time. In the model, we design an aggregation mechanism for the sensor-cloud to aggregate application requests so that workloads required for constrained sensor nodes are minimized to...
With an advancement towards the paradigm of Internet of Things (IoT), in which every device will be interconnected and communicating with each other, the field of wireless sensor networks has helped to resolve an ever-growing demand in meeting deadlines and reducing power consumption. Among several standards that provide support for IoT, the recently published IEEE 802.15.4e protocol is specifically...
Content Delivery Networks (CDN) are witnessing the outburst of video streaming (e.g., personal live streaming or Video-on-Demand) where the video content, produced or accessed by mobile phones, must be quickly transferred from a point to another of the network. Whenever a user requests a video not directly available at the edge server, the CDN network must 1) identify the best location in the network...
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