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In an inevitable changing world where our ecology is deteriorating and renewable resource is at its critical stage left us with only one option: “Go Green”. It postulates to design energy-efficient and economic internet equipment, albeit a trade-off between performances versus power saving. But it is the demand of time to adore power saving rather performance for the sustainable and green earth. As...
With the popularity of smart devices in a variety of actions to drive more usage of wireless broadband networks. OTT refers to delivery of video, audio and other media over the Internet. The video-related applications and services are major challenges that impact the network performance in the future. It is important to achieve network and service traffic offloading to overcome high-speed, real-time,...
In this paper we introduce the SDNRoute system which aims to support routing decisions in Software Defined Networks. Such a system is especially important in the context of the SDN as this concept makes it possible to perform routing in a dynamic and elastic manner. We focus on the SDNRoute architecture and research challenges that must be investigated to develop the system. Additionally, we provide...
The densification of small cells in heterogeneous cellular networks is one of the main approaches of 5G technology that aim to fulfill the growth of traffic demand. However, this densification leads to increase total energy consumption of the network. One way to save energy is to switch off some underutilized cells during low traffic periods. In order to address this problem, we propose dynamic switch...
With the advent of multiple radio interfaces on modern smart phones, simultaneous transmission and reception of data through via both mobile networks and WiFi networks has gained a considerable attention as a cost-effective means for mobile data offloading. In this paper, we present a practical SDN-based data offloading framework based on a Femto-WiFi Integrated network. The proposed framework take...
One of the problems of user experience prognostication in telecommunication services is the selection of Quality of Service (QoS) indicators, more reflecting users' experience, not the network providers' one. In this paper, we propose definitions and analytical expressions of four new overall network QoS time and traffic efficiency indicators, compared analytically and numerically. Some of them are...
Software Defined Networking (SDN) is a new networking paradigm that separates the network control plane from the packet forwarding plane. It provides the applications with an abstracted and centralized view of the distributed network state. This paper utilizes SDN for congestion awareness and traffic scheduling for the switch congestion control. For such a purpose, a traffic assignment optimization...
In recent decades, due to the gradual emergence of urban traffic problems, Development of Urban Intelligent Traffic Control System is getting to arouse the study of researcher. Therefore, this paper mainly studied on intelligent traffic control of the city from a regional perspective. This paper firstly introduces the division of traffic control sub-region. Secondly, this paper discriminated the traffic...
In face of the rapid growth of data traffic in cellular networks, Cloud Radio Access Network (C-RAN) architecture has been proposed as a solution to obtain better performance in terms of efficiency, expansibility, elasticity, stability and expenditure such as Capital Expenditure (CAPEX) and Operational Expenditure (OPEX). However, C-RAN demands a comprehensive evaluation model and accurate qualitative...
Software Defined Networking (SDN) is emerging as a new paradigm in which the control plane is decoupled from the data plane. SDN is an enabler of network control to become directly programmable. The underlying infrastructure can be abstracted from applications and network services. Recently, SDN has rapidly expanded and attracted many research efforts. In the open literature, analytical tools have...
Due to increased energy consumption and carbon emissions of the ICT industry, operators worldwide are focusing on reducing energy consumption of their networks from the financial as well as corporate responsibility perspectives. The subject of green or energy-efficient operation of the cellular access network has attracted a lot of attention in the research community recently. In this regard, dynamically...
The recently developed Software-Defined Networking (SDN) provides flexibility, scalability and reduce the cost of hardware for operators and vendors. In this paper, we propose four routing algorithms in SDN to minimize network latency and balance the traffic load of each switch link in a network. The first routing algorithm is the shortest path first (SPF) algorithm. The SPF algorithm can find the...
This paper proposes an adaptive channel access (ACA) mechanism for LTE-U and WiFi coexistence in an unlicensed spectrum. To support the ACA mechanism, we introduce a new time-frequency structure, and a modified listen before talk (MLBT) functionality for channel contention of LTE-U users. Moreover, we also introduce a dynamic channel switch (DCS) sub-mechanism and an adaptive almost blank subframe...
Dynamic TDD is one important feature of 3GPP Release 12. In parallel with the 3GPP standardization, a testbed has been developed to verify the feasibility of dynamic TDD and evaluate the performance in different scenarios. Both dynamic-TDD capable UE and eNode B have been developed. Fast TDD configuration using explicit physical layer signaling has been successfully implemented and over the air measurements...
Minimizing the flow completion times (FCTs), especially for the short flows, is widely deemed an important optimization goal in designing data center networks, while flow scheduling strategies play great role in achieving this target. Existing optimal scheduling algorithms severely depend on the prior knowledge of flow size, which is hard to implement in practice. Therefore, it is necessary to estimate...
In today's era of communication, a company's brand is driven by more than the combination of promises made and promises kept for customer satisfaction to gain popularity of brand name. A telecommunications service provider's survival depends on its ability to prepare for changes in customer needs, as well as changes in regulation and technology. But the increasing expectations of customers and the...
In this paper, we study the energy efficiency of the future 5G networks. These networks are known to be heterogeneous, containing different types of Base Stations (BSs) each one characterized by its own network coverage and delivered capacity. The aim of our work is to study and improve the energy efficiency of these networks. This is achieved by adjusting network density (i.e., number of active BSs)...
Energy efficiency in future green cellular wireless networks poses a challenge to operators and researchers. An effective method of providing energy savings (ES) in base stations (BSs) is to switch off idle BSs or put them into sleep mode and subsequently migrate the traffic loads to active BSs in their neighborhood. The intrinsic issue related to such methods applied to heterogeneous networks (HetNets)...
By 2020, next generation (5G) cellular networks are expected to support a 1000 fold traffic increase. To meet such traffic demands, Base Station (BS) densification through small cells are deployed. However, BSs are costly and consume over half of the cellular network energy. Meanwhile, Cloud Radio Access Networks (C-RAN) has been proposed as an energy efficient architecture that leverage cloud computing...
In this paper, we study the energy consumption in heterogeneous networks (HetNets). HetNets are known to be one of the main characteristics of the future 5G networks. In this work we aim to minimize the global energy consumed within these networks by adapting the network density to the operating traffic load. We formulate this problem by expressing the energy gain (i.e., the energy saved) which should...
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