Currently, one of the main enablers for network evolution is software-defined networking (SDN), where control plane decoupled from data plane. A controller, as a (logically) centralized entity in plane, Achilles' heel SDN resilience since its failure would affect proper functioning entire network. The strongly linked to controller placement problem, which deals with positioning and assignment controllers forwarding devices (i.e., switches). resilient problem needs assign more than switch...

Software Defined Networking (SDN) is an emerging paradigm for network design and management. By providing programmability separation of control data planes, SDN offers salient features such as simplified centralized management control, reduced complexity accelerated innovation. However, introduces new challenges that should be addressed properly in order to benefit from its unprecedented capabilities. Due the (logically) SDN, resilience plane has a great impact on functioning whole system....

Software-defined networking (SDN) provides an unprecedented opportunity to enhance the traffic engineering in IP networks. This emerges from fine-grained centralized control over routing, which enables immediate response network dynamics. However, due high operational and performance costs of migration, operators prefer a multi-period planning approach for deployment SDN-enabled devices. In this letter, we present evaluate efficient algorithm seek beneficial upgrade policy considering budget...

Modern wireless broadband networks are crucial for different mission-critical applications and public safety agencies. Various natural disasters physical attacks would result in the malfunction or failure of cellular infrastructures. This subsequently affects correct functioning dependent mission- critical applications. Thus, disaster management response is great importance. In this paper, we focus on using D2D communications to extend coverage base stations, controller-assisted routing...

The increased and widespread usage of digital multimedia has aroused great concerns regarding issues such as copyright protection, copy control proof ownership. Digital watermarking serves a solution to these kinds problems; however, techniques have demonstrated possess vulnerabilities. Thus opening avenues for malicious attackers abuse security breaches. Therefore, maintaining the watermarked media i.e. text, image, audio video received considerable attention. This paper conducted...

Nowadays, Wireless Mesh Networks (WMNs) have received worldwide acceptance as an attractive paradigm on top of the existing and upcoming wireless technologies. Up to now, a lot research studies been conducted channel assignment in multi-radio WMNs. To address destructive impact interference inevitable element WMNs, it is necessary reconfigure radios for switching less-congested channels, frequently. Although this problem has investigated through extensive modeling simulations, consequences...

Software-defined networking (SDN) has introduced noticeable progresses in the design and development of computer networks. In fact, SDN empowers us to run more advanced algorithms for resource management through separation control data planes using a centralized approach. By applying different communication platforms, e.g., Wi-Fi mesh networks (WMNs), we gain an unprecedented opportunity efficient cost-effective solutions. WMNs, process service provisioning incorporates tightly correlated...

Chaotic deployment of Wireless Local Area Networks (WLANs) in dense urban areas is one the common issues many Internet Service Providers (ISPs) and Wi-Fi users. It results a substantial reduction throughput impedes balanced distribution bandwidth among Most these networks are managed independently there no cooperation them. Moreover, conventional association mechanism that selects Access Points (APs) with strongest Received Signal Strength Indicator (RSSI) aggravates this situation. In...

In recent years, dramatic growth of mobile data traffic has left the operators no choice but to consider Wi-Fi networks as an economic complementary solution. To achieve this, WLANs require adopt some key features carrier-grade operators, such centralized resource management. As emerging paradigm, Software Defined Networking (SDN) can be used provide salient network solutions for infrastructures. fact, applying SDN different wireless platforms, e.g., Mesh Networks (WMNs), brings...

Software Defined Networking (SDN) brings unprecedented opportunities for facilitating the management of Wireless Mesh Networks (WMNs), particularly when handling network dynamics such as link/node failures. The inflexible destination-based routing and failure recovery conventional WMN protocols are superseded by efficient highly flexible per-flow (re)routing in SDN-based networks. Most existing works focus on protection pre-computing backup paths using OpenFlow fast failover groups to...

In this paper, the performance of IEEE 802.11n Wi-Fi technology at 5.18 GHz frequency in one rural areas Malaysia, which is typically covered by dense tropical foliage, evaluated and analyzed. To our best knowledge, studies on foliage area have not been fully explored. We conducted line-of-sight non-line-of-sight measurements through using directional high gain antennas to determine throughput other well-known metrics. It observed that utilizing key features such as channel bonding short...

Wi-Fi Mesh Networks (WMNs) as a popular platform can be used for the construction of dynamic backhaul networks especially over small cells, which is an indispensable part 5G technology. Finding optimal single-path flow routing solution multi-hop classic NP-hard problem and there are non-trivial drawbacks such packet re-ordering to implement multi-path practical solution. However, Software Defined Networking (SDN) emerging paradigm provide great opportunity fast efficient solutions network...

In this paper, we propose a new design with high-level security and low-cost implementation for different network topologies. Achieving both factors at the same time is challenging work experts, especially when they want to apply defense in depth strategy various components of their networks. Offered scenario has been done one most visited web sites an Iranian organization more than 15,000 concurrent users that all them reliably smoothly were served. Also, used provide sufficient level...

A promising solution to alleviate the mobile traffic burden on Internet is cache most popular content at heterogeneous wireless network edge. However, due vast stored remote server, and effectively, it concerns file popularity profile that may not be known by operators in advance. Therefore, online learning techniques are used tackle challenges brought unknown knowledge. We present an effective efficient algorithm based stochastic combinatorial multi-armed bandits with locked-up slots...

Fair bandwidth distribution among users remains a persistence issue in Wireless Mesh Networks (WMNs). Users which are more hops away from the gateway generally suffer higher throughput degradation and hence delay. This is mainly due to nature of IEEE 802.11 protocol, i.e. its operation contention mode. In this paper, we propose practical network-layer solution address fairness Multi-Radio WMNs. The proposed framework consists two main components: 1) lightweight messaging system 2) Elastic...

In this paper we present a set of network experiments on IEEE 802.11n link constructed with open source software and commercially available hardware. Most existing works focus optimizing MAC layer parameters in order to improve the performance. paper, investigate several "non-MAC" performance impacting factors, which are usually overlooked by research community. The were carried out an indoor office environment over relatively clean 5GHz band. Our reveal that factors such as (i) rate control...