The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, a joint control method for the user association and almost blank sub-frame (ABSF) based interference coordination (IC) technique in heterogeneous cellular networks is proposed. The optimization objective is simultaneously improving system throughput and guaranteeing proportionally fairness. Usually, user and base station (UE-BS) association is performed before ABSF rate determination,...
We propose and experimentally demonstrate a cell grouping method to improve frequency-reused millimeter-wave coverage. The method provides a 3.5-dB improvement on signal quality and power budget in a field test on a three-transmitter radio-over-fiber system.
The massive admiration of cellular devices has stimulated a flourishing growth of high data rate wireless services, which has sparked an insisting need for more efficient spectrum usage as well as reduced power consumption. This has given rise to Device-to-Device (D2D) communication, which offloads the relaying burden of the base station to direct links between the users. Recent studies have shown...
Software defined networking (SDN) has the potential to meet the requirements of the next generation traffic and service requirements. It is especially feasible and flexible when combining with small cell networks, which emerges into a software defined small cell networking (SDSCN) framework. SDSCN stands a chance to play a fundamental role in developing future 5G networks. It is particularly a challenging...
Affected by the stratosphere winds, the swing of high altitude platform station seriously affected the performance of the communication system. This paper described and analyzed the swing state of the platform, established the swing state of high altitude platform multi beam antenna coverage model. The expression of coverage geometry, received power and carrier interference ratio was derived. In the...
In recent years, 4G LTE networks have been deployed by some operators and some of them also sell Femto Cell service in the market. As a kind of Heterogeneous network in cellular communication, lots of work have been published in last few years. However, considered in next generation cellular communication system, some challenging features have been planned like: A super-efficient and fast mobile network...
Femtocells are considered as a basic part in LTE and LTE Advanced systems and their importance will be leveraged in future 5G systems. Their specific characteristics allow for their independence in administration and optimization. Femtocell deployment aims at providing better indoor coverage, enhance spectral efficiency, and offload macrocell traffic. Despite their benefits for both users and operators...
The Adaptive Neuro-Complex Fuzzy Inferential System was the first neuro-fuzzy system employing complex fuzzy sets and rule interference. It was shown to be both accurate and parsimonious in time series forecasting. The main disadvantage of this system is its slow learning algorithm. One possible approach to speeding up this neuro-fuzzy system is to apply concepts from the Extreme Learning Machine...
Due to the upsurge of context-aware and proximity aware applications, device-to-device (D2D) enabled mobile cloud (MC) emerges as next step towards future 5G system. There are many applications for such MC based architecture but mobile data offloading is one of the most prominent one especially for ultra dense wireless networks. The proposed system exploits the short range links to establish a cluster...
Device-to-Device (D2D) communications and small cell networks, as promising technologies to improve spectral efficiency and system throughput for future cellular networks, have received increasing attentions. In this paper, we model D2D communications in the two-tier heterogeneous macro-small cell networks. We propose not only two novel resource sharing strategies for D2D users, namely dedicated resource...
In this paper, we focus on a beam pattern diversity of user terminals in order to improve the network-wide performance along with an inter-cell interference coordination (ICIC). Previous ICIC works mainly focused on conventional single antenna user terminals, and thus further improvement may be possible by employing the opportunistic scheduling to exploit multi-user and beam pattern diversity. Therefore,...
Cache-enabled device-to-device (D2D) networks turn memory of the devices at the network edge, such as smart phones and tablets, into bandwidth by enabling asynchronous content sharing directly between proximate devices. Limited storage capacity of the mobile devices necessitates the determination of optimal set of contents to be cached on each device. In order to study the problem of optimal cache...
In this paper, the problem of distributed power allocation is considered for the downlink of a cloud radio access network (CRAN) that is coexisting with a heterogeneous network. In this multi-tier system, the heterogeneous network base stations (BSs) as well as the CRAN remote radio heads seek to choose their optimal power to maximize their users' rates. The problem is formulated as a noncooperative...
Many LTE-Advanced algorithms and protocols rely on node coordination and cooperation to reduce power consumption, increase spectral efficiency and improve cell-edge performance. Functions such as Coordinated Multi Point, Network Assisted Handover, etc., require a standard connection among nodes to support their operations. The LTE X2 interface meets the above requirements and allows operators to connect...
In recent times in-flight Broadband Internet connection service is becoming more common. In Japan, most in-flight connectivity utilizes a satellite backhaul system. However, the satellite system tends to be very bulky and expensive for short-and medium-haul continental flights. The satellite system has limited capacity, especially serving a large number of continental aircraft in a limited geographical...
We propose a dynamic and cooperative approach to support the desired Quality of Experience (QoE) of the mobile users in a heterogeneous cellular network. Specifically, we focus on a scenario in which a mobile video streaming service is provided to users. We then develop a mobile streaming traffic micro-to-macro offloading scheme based on a cross layer approach, in which we exploit the knowledge of...
LTE-A addresses the challenges of coverage block holes and increase in user density with new features, such as small cell and femto cell. Small cell can be an inexpensive substitute to macro cell in coverage depleted areas. In contrast, heterogeneous network using femto cells with its ubiquitous coverage, can deliver high-speed data. Resource scheduling algorithm has an important role in determining...
The surge of mobile data traffic has spurred academia and industries to begin developing 5G networks. 5G is meant to overcome limitations of 4G cellular technology relying on the dominant trend of mobile network densification with the deployment of small cell base stations. To accelerate this process, low complexity and inexpensive remote radio heads (RRHs) are deployed massively and connected to...
Heterogeneous cloud radio access networks (H-CRAN), which combines the benefits of cloud radio access radio networks (C-RAN) and heterogeneous networks (HetNets), is an emerging technology to achieve high data transmission rates in 5G cellular networks. In H-CRAN, to mitigate interference among macro BSs (known as high-power nodes (HPNs)) and remote radio heads (known as low-power nodes (LPNs)), Fractional...
Database-aided user association, where users are associated with data base stations (BSs) based on a database which stores their geographical location with signal-to-noise-ratio tagging, will play a vital role in the futuristic cellular architecture with separated control and data planes. However, such approach can lead to inaccurate user-data BS association, as a result of the inaccuracies in the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.