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The energy consumption of the base station(BS) accounts for great proportion of the total energy consumption of the wireless access network(WAN). It would save a large amount of energy that operators switch off a part of spare BSs during the time of less network request. It is difficult to deploy a BS energy saving strategy in the current network architecture because of the tightly coupled network...
Three-dimensional multiple-input multiple-output (3D MIMO) is one of the most promising techniques for the fifth-generation (5G) mobile communication systems. In order to catch the the propagation characteristics of the 3D channel, extensive measurements have been carried out. Although outdoor to indoor (O2I) scenarios is one of the main propagation of 3D MIMO channel, it remains too much work to...
With the development of wireless communication, the characteristics of radio propagation become more and more important. Channel measurement and computer simulation are widely used in radio propagation research. For convenience, simulation based on FEKO was presented in this paper. The effect of frequency, antenna location, antenna height and conductivity on propagation characteristics in corridor...
Ultra-dense networks are regarded as a promising candidate for providing high data rate at low implementation cost. With a dense and irregular deployment of access points, spatial reuse will be improved, and varying cellular coverage also known as the amorphous cell is provided, which leads to a more complicated interference environment. In this paper, a novel interference coordination strategy, based...
In this work, a multi-floor Poisson point process (MFPPP) model is proposed to analyze the performance of wireless networks inside a building, where the impact of penetration loss and floor height on the network performance is taken into consideration. According to the proposed MFPPP model, the coverage probability of the cross-floor max-signal-to-interference-plus-noise-ratio (SINR) association (CFMSA)...
A geometry-based stochastic scattering model (GBSSM) combining of multi-rings and multi-ellipses model for wideband multi-input multi-output (MIMO) vehicle-to-vehicle (V2V) fading channels is developed in this paper with cross polarized antennas. The proposed model can be applied for the line-of-sight (LOS) and non-LOS (NLOS) scenarios. The channel implementation described in this paper is more concise...
Degraded communication performance due to feedback delay is recognized in multiple-input multiple-output (MIMO) eigenbeam space-division multiplexing (E-SDM) in time-varying channels. The degree of performance degradation differs depending on the MIMO reception technique used. The degree of degradation in cases where spatial filtering techniques such as the zero-forcing (ZF) technique or the minimum...
In this paper, we study the interference management problem for device to device (D2D) communication underlaying cellular networks. To improve the throughput of the D2D communication, the D2D pair can reuse multi-channel of cellular communication. We propose the game theoretic framework to jointly optimize the throughput of the D2D communication as well as guarantee the interference to the cellular...
Autonomic Internet of Things is the creation of self-management capability in the Internet of Things system by embedding certain properties, in order to free human from all detail of the operation and management of the system while providing the system to always operate on the best performance. Some of these properties are self-healing, self-configuring, self-optimization and self-protection which...
To raise the resource efficiency in Machine-to-Machine (M2M) communication, we realize a new random access (RA) procedure. In the improved RA scheme, we use Code Division Multiple Access (CDMA) to transmit User Equipment Identity (UE ID) and Cyclic Redundancy Check(CRC) information in the first step of RA procedure, and then distinguish each UE and detect preamble collisions in the second step. We...
Recently, wireless local area networks (WLANs) have been densely deployed. In high density WLANs, co-channel interference has become one of the biggest challenges for the network performance. The IEEE 802.11 based WLANs have limited wireless channels, therefore, not all the adjacent APs can work in different non-overlapping channels and co-channel interference will affect the network performance severely...
Device-to-Device (D2D) communications are promising technologies to improve the spectrum efficiency, network throughput, and transmission latency for short-range communications in underlaid cellular networks. In this paper, we investigate the resource allocation for multiple D2D pairs in underlaid cellular networks. By utilizing the Power Emission Density-based interference modeling method, the impact...
Trickle algorithm, a transmission scheduling algorithm developed for wireless sensor networks (WSNs), is now widely used in low power and lossy networks. IPV6 Routing Protocol for Low Power and Lossy Networks (RPL) and Multicast Protocol for Low Power and Lossy networks (MPL) have employed Trickle algorithm as a basic mechanism for message dissemination. Trickle algorithm adopts a “polite gossip”...
Future fifth generation (5G) wireless network will be driven by the large volumes of mobile data traffic, especially from enormous Machine Type Communication(MTC) devices but just use limited spectrum resources. In this paper, our fundamental motivation is to use less wireless resource at the cost of larger but acceptable transmission latency for massive clustering MTC devices. From the two observations...
In this paper, we optimize the the symbol error rate (SER) performance of full-duplex (FD) amplify-and-forward (AF) relay system by adopting the joint power allocation and relay location optimization. We first derive the asymptotic expressions of the outage probability and SER performance under the consideration of the loop interference. We then formulate the optimization problem based on the minimal...
Co-channel interference is a dominant limiting factor for LTE uplink system capacity. BS (Base station) MMSE-IRC (Minimum mean square error — interference rejection combining) receiver, as a promising approach for spatial domain interference handling, is introduced in LTE-Advanced Release 13. This paper firstly gives the signal model and receiver structure for BS MMSE-IRC. To evaluate MMSE-IRC performance...
This paper investigates a three-node multiple-input multiple-output relay system suffering from co-channel interference (CCI) at the multi-antenna relay. Contrary to the conventional relay networks, we consider the scenario that the relay is an energy harvesting (EH) node and has no embedded energy supply. But it is equipped with a rechargeable battery such that it can harvest and accumulate the harvested...
To guarantee secure communication of the primary system and efficiently utilize the licensed spectrum, in this paper, we propose a two-path successive relaying and jamming based cooperative transmission (TSRJC) scheme. In TSRJC scheme, two secondary users (SU) successively relay the primary message and jam the primary eavesdropper to confirm secure and reliable transmission of the primary system during...
In order to support the booming capacity requirements of the fifth generation mobile system (5G), worldwide mobile operators are increasingly interested in offloading the cellular network traffics to Wi-Fi Access Points (APs) or small cells. Addressing on the offloading problem for delay-tolerant traffic, this paper proposes Wi-Fi delayed offloading strategy and resource re-allocation in Heterogeneous...
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