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Very recently, regulatory bodies worldwide started to approve the opportunistic access of unlicensed networks to the TVWS spectrum. Hence, in the near future, multiple heterogeneous and independently-operated unlicensed networks will coexist within the same geographical area over shared TVWS. Nevertheless, the coexistence among heterogeneous unlicensed networks over TVWS represents an open problem,...
In the future wireless heterogeneous network, it is significantly critical to rationally and efficiently utilize network communication resource for satisfying the diversification and differentiation of user and service requirements. In this paper, we propose a user-centric wireless access and service matching scheme in heterogeneous networks with multiple radio access technologies (Multi-RATs). We...
Dense and heterogeneous networks (HetNets) are being deployed to provide better coverage and throughput, thus improving the quality of experience at mobile users. Besides the important implications for energy consumption, the trend towards densification calls for more and more wireless links to forward a massive backhaul traffic into the core network. It is critically important to take into account...
Enabling vehicles to connect to the best available communication medium in a heterogeneous network is of high importance to preserve good quality of service (QoS), however a hard task to handle. The ISO-CALM (Communications Access for Land Mobiles) offers the possibility to manage multiple communication interfaces with a promising architecture, but without any specific implementation. Several techniques...
Nervous cells and blood vessels form crucial circulating networks in human body. They are interdependent on biological level and communicate with each other via abundant interaction phenomena. These interactions are complex while worthy concerned, which may guide to implement controllable relaying communication across nervous and blood vascular heterogeneous channels. In this paper, we highlight the...
In this paper, the concept of moving small cells in mobile networks is presented and evaluated taking into account the dynamics of the system. We consider a small cell moving according to a Manhattan mobility model which is the case when the small cell is deployed on the top of a bus following a predefined trajectory in areas which are generally crowded. Taking into account the distribution of user...
This paper proposes an analytical approach to modeling and analyzing the coexisting transmission performance in a multi-tier heterogeneous network with multiple radio access technologies (Multi-RATs). The coexistence issue is a special phenomenon uniquely existing in a multi-RAT network and it is rarely studied in prior works on heterogeneous wireless network. To simply characterize the coexisting...
In this article, a network model incorporating both line-of-sight (LOS) and non-line-of-sight (NLOS) transmissions is proposed to investigate impacts of blockages in urban areas on heterogeneous network coverage performance. Results show that co-existence of NLOS and LOS transmissions has a significant impact on network performance. We find in urban areas, that deploying more BSs in different tiers...
Heterogeneous cellular network has become an important network architecture to improve network capacity and spectral efficiency. This paper works on a theoretical framework for analyzing the system spectral efficiency in a heterogeneous network with different association schemes including best power and range expansion associations. Furthermore, a fractional frequency reuse scheme is applied to mitigate...
In this paper we investigate the problem of optimal cache placement under secrecy constraints in heterogeneous networks, where small-cell base stations are equipped with caches to reduce the overall backhaul load. For two models for eavesdropping attacks, we formally derive the necessary conditions for secrecy and we derive the corresponding achievable backhaul rate. In particular we formulate the...
In 5G, heterogeneous broadband networks will emerge to a common set of objectives to offer the end users higher capacity, robustness, security, QoS, and more in a unified and converged manner. In order to provide end-to-end QoS support to application services over the heterogeneous networks, a common QoS framework is proposed in this paper. The framework consists of a two-level scheduling scheme:...
Power control is essential for uplink multi-user access of Long Term Evolution (LTE). It guarantees that the received uplink power is kept within reasonable dynamic range such that the weak signals from large distance users do not get lost due to limited resolution of the eNB's Analog-to-Digital Converter (ADC). Capacity optimization of the open loop power control (OLPC) parameter P0 is applicable...
Next generation mobile networks will face the unprecedented demand for higher data rates. To satisfy this demand, the dense deployment of heterogeneous wireless networks (HetNets) is a promising solution. One of the major challenges in dense HetNets is to dynamically allocate the resources such as power and channel so that the energy efficiency and throughput of the network improve. One of the important...
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