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The Phantom cell concept is a solution for high-traffic outdoor environments that can also support good mobility and connectivity in ultra-dense network. In a phantom cells network, a centralized Macrocell controls all phantom cells within its coverage area and the C-Plane and U-Plane are split. Many issues need to be addressed for this architecture including radio resources allocation and cross/co...
User authentication at Wi-Fi Access Points (APs) is becoming an important issue. Wi-Fi APs are indeed ubiquitous, but existing authentication methods such as WPA/WPA2 static pre-shared secret key (PSK), or 802.1X-based online authentication services (e.g., RADIUS servers/proxies) have their theoretical or practical limitations. In a previous work, we proposed WI-FAB, a new authentication mechanism...
Dynamic Spectrum Access (DSA) has been proposed to increase the spectrum utilization efficiency and to solve the spectrum scarcity problem. However, due to the spectrum sharing and opportunistic access nature of the DSA networks, they are more vulnerable to security threats like jammers. In this paper, we propose an anti-jamming technique in which the secondary network coordinator groups the secondary...
In this work, we propose a mobility management optimization framework for the networks employing full-frequency reuse. The mobility management issue is considered in the context of two main self-organizing networks (SON) functionalities, i.e mobility load balancing (MLB) and mobility robustness optimization (MRO) as a user-to-BS assigment problem. A central optimization method, which aims to maximize...
LoRaWAN is emerging as an attractive network infrastructure for ultra low power Internet of Thing devices. Albeit the technology itself is quite mature and specified, how to effectively allocate wireless resources so as to support a large amount of devices in a same terrestrial area is an open challenge. This paper contributes by proposing two algorithms (of incremental complexity) which are shown...
MPEG has recently proposed Server and Network Assisted Dynamic Adaptive Streaming over HTTP (SAND-DASH) for video streaming over the Internet. In contrast to the purely client-based video streaming in which each client makes its own decision to adjust its bitrate, SAND-DASH enables a group of simultaneous clients to select their bitrates in a coordinated fashion in order to improve resource utilization...
The rapid growth of new radio technologies for Smart City/Building/Home applications means that models of cross-technology interference are needed to inform the development of higher layer protocols and applications. We systematically investigate interference interactions between LoRa and IEEE 802.15.4g networks. Our results show that LoRa can obtain high packet reception rates, even in presence of...
The increased popularity of IEEE 802.11 LANs (WLANs) in residential (home) environments leads to dense, unplanned and thus chaotic deployments. Access Points (APs) are frequently deployed unfavorably in terms of radio coverage and use interfering frequency/power settings. In fact, in some parts of a one's apartment the usage of the neighbor's AP might be preferred as it might provide better signal...
We consider the scheduling problem for Aggregated ConvergeCast in wireless sensor networks with a physical interference model. Previous work consists of either heuristics without performance guarantees, or approximation algorithms which do not perform well in practice. We propose here a first scalable mathematical SINR (Signal to Interference plus Noise Ratio) model that outputs an optimal Aggregated...
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