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Automotive industry will be greatly benefited by the advent of 5G Networking and the huge boost in performance and coverage it will support. Road safety and traffic efficiency services will be significantly upgraded through seamlessly interconnected devices, while latency decrease will most likely allow autonomous driving to become a commodity, available to everyone. This technology will have a huge...
The conventional LTE coverage has an approximately 100 km cell range limit defined in 3GPP specification. The LTE coverage for ocean area should be extended beyond the 3GPP specification due to an emergency call and the advent of safety IoT (Internet of Things) device. In this paper, we propose a novel coverage expansion technology called OTHAD (Over The Horizontal Antenna Distribution) and inter-cell...
To tackle the challenge of surging data rate demand, heterogeneous network (HetNet) composed of multiple radio access technologies (RATs) has been proposed as one promising solution. In addition, the LTE and WLAN Aggregation (LWA) architecture was specified recently, but few existing network selection algorithm takes consideration on the cooperation between RATs. In this paper, we propose new Aggregation...
This work proposes a method to optimize the resource block allocation in the cloud radio access network for a long term evolution system. This approach consists in three steps. First, the baseband unit collects the required information about users. Then, it optimizes the resource block allocation by carrying out a genetic algorithm. After that, it sends the solution to the remote heads. The simulations...
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...
Radio Resource Allocation (RRA) is a key challenge in every wireless communication generation. Due to scarcity of wireless spectrum, resources are shared based on requirement. We can find there is a tradeoff between availability and utilization of resources. However resource requirement also changes varying with user request, certain network failure incident, or time varying consumption patterns....
To meet quality of service requirements on the uplink of future cellular networks, we need to exploit inter-cell interference among users eligible for cooperation. Cloud Radio Access Network (C-RAN) architecture is particularly favorable to realize cooperation between users in neighboring cells, since signal detection is realized in the same processing unit. The novel technology of Software Defined...
Traffic demand in terms of total traffic volume and bit rate of mobile users is expected to increase exponentially over the coming years. As a result, current cellular networks are rapidly reaching their capacity limitations. Rescaling existing networks and protocols will not solve the problem due to a number of reasons. Firstly, the cost of upgrading backhaul networks is very high. Secondly, the...
In this paper, we consider a power control scheme for co-channel deployment of femtocells in the umbrella of macrocell LTE. The severe interference in the downlink from the femtocells should be controlled to guarantee the Quality of Service (QoS) required by the macrocell users. We used clustering method for grouping femtocells according to their geographical localizations. For this scenario, we proposed...
DC (Dual Connectivity) and D2D (Device to Device) are two most promising methods to address huge traffic challenges in extreme dense network. In this paper, we investigate the researches and developments on DC and D2D in 3GPP (Third Generation Partnership Project). DC refers to the operation where some UE consumes radio resources provided by at least two different network points connected with non-ideal...
In Long Term Evolution Advanced (LTE-A) Release 12 (Rel-12), small cell enhancement (SCE) has been intensively discussed since it could substantially provide capacity boosting and is beneficial for future network, where the requirement of data rate is much higher. In small cell environment, resource and interference coordination are of great importance to exploit the performance gain, especially in...
Long Term Evolution Advanced (LTE-Advanced) networks have problems of low data rate for cell-edge users, as well as coverage gaps. Contemporary communication standards use different techniques to deal with these problems; one candidate technique is called Coordinated Multi-Point (CoMP). In this context, we introduce Shared Segmented Upload (SSU), a novel method for uploading large files from a UE...
Recently, a new network architecture with split control-plane and user-plane has been proposed and gained a lot of momentum in the standardisation of Long Term Evolution (LTE) Release 12. In this new network architecture, the control-plane, which transmits system information and handles user connectivity, and the user-plane, which manages user data, are split and no longer transmitted necessarily...
Long Term Evolution (LTE) systems face the problem of coverage at the cell edge user equipments (UEs). A prominent technology of LTE-Advanced systems known as relaying provides solution to this problem. Relaying not only offers significant gain for the system capacity but also improves the coverage of the cell edge UEs. This paper investigates the performance of the LTE system in terms of the path...
The newly released LTE-Advanced (LTE-A) is currently being introduced as a further step to LTE and as the real 4G cellular standard on cellular networks evolution. Alongside with the increasing demands in mobile networks, the customers' satisfaction with a ubiquitous heterogeneous network (HetNet) is going to be the main challenge for the network operators, and therefore planning a multi-layer network...
In this paper, we propose an inter-cell interference management scheme using a multi-cell SRN (Shared Relay Node) in order to avoid inter-cell interference and to increase the cell throughput in 3GPP LTE (3rd Generation Partnership Project Long Term Evolution)-Advanced networks. Recently, the CoMP (Coordinated Multi-Point transmission/reception) scheme has received growing attention as a promising...
We envision that the future mobile communication network will be an Ultra Dense, Diverse Access Technologies Converged, Intelligent Network infrastructure complemented by a Device-to-Device network. An ultra-dense radio network with cells of many different sizes is the most effective way of increasing system capacity and ubiquitously covers the service area. Diverse access technology convergence ensures...
The Third Generation Partnership Project (3GPP) has been studying dynamic allocation of sub-frames to uplink (UL) or downlink (DL) in Time Division Duplex (TDD), called ‘Dynamic TDD,’ since the Long Term Evolution (LTE) Rel. 11 timeframe. At the same time, 3GPP is also standardizing Enhanced Local Area (eLA) small-cell heterogeneous architectures for inclusion in LTE-B (LTE Rel. 12) as a solution...
In cellular systems, Fractional Frequency Reuse (FFR) partitions each cell into two regions; inner region and outer region and allocates different frequency band to each region. Since the users at the inner region are less exposed to inter-cell interference, the frequency resources in each inner region can be universally used. Based on this frequency band allocation, FFR may reduce channel interference...
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