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Massive Multiple-input Multiple-output (MIMO) adaption is one of the primary evolving objectives for the next generation high speed train (HST) communication system. In this paper, we consider how to design an efficient low-complexity location-aware beamforming for the multi-user (MU) massive MIMO system in HST scenario. We first put forward a lowcomplexity beamforming based on location information,...
In this paper, we develop a circuit power selection algorithm to maximize energy efficiency (EE) of mobile users for the uplink multi-user multiple input multiple output system (MU-MIMO) in multi-cell environment. In proposed algorithm, antenna selection algorithm is proposed for circuit power optimization considering a inter-cell interference. We verify the performance of proposed algorithm using...
We investigate in this paper the resource allocation problem in an uplink cooperative MIMO OFDMA multiuser system. This system may be used in 5G in the context of green communications since we aim to save energy by reducing the system transmit power. We focus on multiplexing Decode and Forward (DF) relays that have their own data to transmit in addition to data to relay. Aiming to minimize the system...
We investigate in this paper the resource allocation problem in an uplink cooperative MIMO OFDMA multiuser system. This system may be used in 5G in the context of green communications since we aim to save energy by reducing the system transmit power. We focus on multiplexing Decode and Forward (DF) relays that have their own data to transmit in addition to data to relay. Aiming to minimize the system...
Long Term Evolution-Advanced (LTE-A) networks exploit the Carrier Aggregation (CA) technique to achieve a higher data rate by allowing user equipments (UEs) to simultaneously aggregate multiple component carriers (CCs). Moreover, MIMO technologies have become increasingly mature and been adopted as a default choice of the 4G standards. However, most of existing studies on resource allocation with...
Spectrum sharing has been recently proposed as a promising paradigm to improve the efficiency of resource usage in next generation mobile networks. In particular, non orthogonal spectrum sharing allows the operators to re-use the available frequencies at the cost of higher interference at the receivers. In this paper, we mathematically analyze the performance of this technique and how it is statistically...
Coordinated multipoint has been widely introduced to enhance the capacity, especially that of users at cell edge. Recently energy efficient transmission techniques are increasingly important due to the increase of energy consumption in wireless communication systems. In this paper, an energy efficient cooperative transmission algorithm using coordinated beamforming is proposed for multi-cell MIMO...
3GPP LTE is a suitable candidate for high quality wireless communication insurance according to the mobile users' requirements thanks to its radio link flexibility using Adaptive Modulation and Coding (AMC), Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiple Access (OFDMA) technologies. This paper addresses the resource allocation optimisation problem aiming to guarantee...
The BuNGee FP7 research project is looking at achieving, in a cost efficient way, throughput densities substantially higher than available with today's systems. Throughput levels of at least 1 Gb/sec/km2 are targeted. The project addresses this goal by a combination of techniques: use of below-rooftop access base stations and a unique feeding architecture using a combination of licensed in-band spectrum...
This paper considers the application of opportunistic multiuser multiple-input multiple-output (MU-MIMO) techniques to multicarrier wireless networks based on orthogonal frequency division multiplexing (OFDM). Unlike related work where the design of the MU-MIMO component is jointly performed with the subcarrier allocation among the users (e.g. some form of OFDMA is present), here it is assumed that...
This paper presents key techniques in Long-Term Evolution (LTE) and LTE-Advanced as well as its potential applications. LTE supports peak rates up to 300 Mbps in downlink (DL) and 75 Mbps in uplink (UL), whereas LTE-Advanced would support 1.2 Gbps in DL and 600 Mbps in UL [1]. Since both peak and average throughput are dramatically improved compared to High-Speed Packet Access (HSPA) [2], LTE and...
In this paper, we consider a system based on Orthogonal Frequency Division Multiple Access (OFDMA) and investigate the benefits of combining the Satisfaction Oriented Resource Allocation (SORA) algorithm, which aims at maximizing the number of satisfied users in a system, and Orthogonal Random Beamforming (ORB), which provides spatial multiplexing gains and has low computacional complexity, low signaling...
In this paper, we propose fairness-oriented packet scheduling (PS) schemes with power-efficient control mechanism for future packet radio systems. In general, multi-antenna transmit-receive schemes provide additional flexibility to packet scheduler functionality. Stemming from the earlier enhanced proportional fair scheduler studies for single-input multiple-output (SIMO) and multiple-input multiple-output...
Environmental issues and the need to reduce energy consumption for lowering operating costs have pushed power efficiency to become one of the major issues of current research in the field of wireless networks. The objective of the Green Radio research programme (Core 5) of Mobile VCE is to deliver reduced power consumption of radio access networks. This paper attempts to show that an efficient exploitation...
IEEE 802.16j multi-hop relay task standard includes two mutually exclusive options: transparent relay stations (T-RS) and non-transparent relay stations (NT-RS). In this work, a system design approach is proposed to compare different relay systems in term of their capacity with rate fairness constraint among the mobile stations (MS). Single-input single-output (SISO) and multi-input multi-output (MIMO)...
Power management and energy-awareness has become popular in mobile computing as well as mobile communications. In future wireless communication systems, the energy efficiency of terminals and base stations has to be improved. Therefore, we propose a new utility function which is the difference of the capacity and a weighted power cost term. Next, the utility region for single-antenna and multi-antenna...
In the frame of the Long Term Evolution (LTE) of mobile networks, the provision of rich multimedia services, such as Mobile TV, is considered of key importance for the LTE proliferation in mobile market. To this end, Multimedia Broadcast/Multicast Service (MBMS) is envisaged to play an instrumental role during LTE standardization process. MBMS was introduced in the Release 6 of Universal Mobile Telecommunication...
In this paper, taking into account the multiple-input multiple-output (MIMO) systems experiencing log-normal shadowing fading, we investigate the ergodic capacity of such MIMO systems. For the MIMO fading channels with shadowing, using the Gauss Hermite integration, we present an approximated capacity expression. We also give a simplified and improved lower bound on the ergodic capacity by applying...
The following topics are dealt with: IP network security; wireless security; network topology; power line communication; intelligent transportation; cryptography; P2P streaming; wireless communication; wireless channel; network traffic; routing protocol; security protocols; resource management; ad hoc network; wireless sensor network; MAC protocol; power control; QoS; scheduling; coding; modulation;...
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