Carrier aggregation is one of the key features for LTE-Advanced. By means CA, users gain access to a total bandwidth up 100 MHz in order meet IMT-Advanced requirements. The system may be contiguous, or composed several non-contiguous chunks that are aggregated. This article presents summary supported CA scenarios as well an overview functionality LTE-Advanced with special emphasis on basic concept, control mechanisms, and performance aspects. discussion includes definitions new terms primary...

Abstract-In this paper we focus on resource allocation for next generation wireless communication systems with aggregation of multiple Component Carriers (CCs), i.e., how to assign the CCs each user, and multiplex users in CC. We first investigate two carrier load balancing methods allocating users- Round Robin (RR) Mobile Hashing (MH) by means a simple theoretical formulation, as well system level simulations. At Layer-2 propose cross-CC packet scheduling algorithm that improves coverage...

The performance of enhanced Inter-Cell Interference Coordination (eICIC) for Long Term Evolution (LTE)- Advanced with co-channel deployment both macro and pico is analyzed. use pico-cell Range Extension (RE) time domain eICIC (TDM muting) combined. evaluated in the downlink by means extensive system level simulations that follow 3GPP guidelines. overall network analyzed different number pico-eNBs, transmit power levels, User Equipment (UE) distributions, packet schedulers. Recommended...

Phase-sensitive optical time domain reflectometer (Φ-OTDR) based distributed fiber sensing system has been widely used in many fields such as long range pipeline pre-warning, perimeter security and structure health monitoring. However, the lack of event recognition ability is always being bottleneck Φ-OTDR field application. An method on deep learning proposed this paper. This directly uses temporal-spatial data matrix from input a convolutional neural network (CNN). Only simple bandpass...

Different technical solutions and innovations are enabling the move from macro-only scenarios towards heterogeneous networks with a mixture of different base station types. In this article we focus on multi-layer LTE-Advanced networks, especially address aspects related to interference management. The network controlled time-domain enhanced inter-cell coordination (eICIC) concept is outlined by explaining benefits characteristics solution. using advanced terminal device receiver...

Different technical solutions are enabling the move from macro-only scenarios towards heterogeneous networks with a mixture of different base station types. In this paper we focus on multi-layer LTE-Advanced networks, and especially address aspects related to co-channel interference management. The network controlled time-domain enhanced inter-cell coordination (eICIC) concept is outlined by explaining benefits characteristics solution. Extensive system level performance results presented...

Long Term Evolution (LTE)-Advanced is expected to aggregate multiple Component Carrier (CC)s fulfil the high data rate requirement. It may serve users with different capabilities in accessing these CCs, e.g., some can access all whereas operate on only one CC. This gives challenges packet scheduler maximize system performance over CCs. In this paper we provide a mathematical model of log-measure utility an LTE-Advanced system, and give proof that our previously developed cross-CC...

In this paper we focus on LTE-Advanced with backward compatibility, which serves a mixture of and LTE-Rel'8 users. Aggregation multiple component carriers (CCs) to form wide spectrum is assumed in order fulfill the bandwidth requirement for next generation systems, thereby leading multi-carrier system. Although user can simultaneously access all CCs, restricted operate single CC at time. Different methods balancing load across these CCs will affect system performance. This investigated...

Abstract This article studies the impact on design of scheduling algorithms for Orthogonal Frequency Division Multiple Access (OFDMA) systems two traffic models described in evaluation methodology proposals from standardization bodies: full buffer and finite models. The analysis concentrates utility-based with an α-fair utility function Non-Real Time (NRT) services. results show that a gradient algorithm is able to maximize aggregate over all users when less realistic model adopted; but not...

In this paper we focus on LTE-Advanced performance under bursty traffic conditions, and devote our effort to the different methods for balancing load across multiple carriers. These carriers are component (CCs) that belong same carrier frequency. They bonded together in order fulfill requirement of wide spectrum LTE-Advanced. We first derive analytical model a birth-death with fixed payload size OFDMA frequency domain packet schedulers. Applying multi-carrier system, compute system setups....

LTE-advanced systems, which aim to provide high data rate wireless services, have received world-wide researching interests nowadays. In this paper, the performance of fixed frequency reuse with different factors is studied in systems. Performance measured terms both average cell throughput and edge user throughput. It found that a properly chosen factor respect size (which leads level inter-cell interference), can offer up 30% gain much higher for cell-edge local area (LA). This from makes...

Enhanced Inter-Cell Interference Coordination (eICIC) for co-channel deployment of pico-cells throughout a macro-cell layout is promising solution to increase system capacity and network coverage in Long Term Evolution (LTE)-Advanced systems. The use both pico-cell Range Extension (RE) time domain eICIC (TDM muting) this scenario has been proved provide high gains compared the traditional homogeneous network. Nevertheless, performance results literature assume ideal Common Reference Signals...

Interference management for co-channel deployment of macro-cells and closed subscriber group (CSG) home-cells (HeNBs) are studied. We especially address the downlink macro-layer coverage-hole problem, where HeNBs may create too high interference to nearby macro-users, unless active is applied. techniques based on HeNB power setting partial Time Domain (TDM) muting Cases with TDM require optimization macro-cell packet scheduler, including taking into account that level varies significantly at...

Segregating concurrent sound streams is a computationally challenging task that requires integrating bottom-up acoustic cues (e.g. pitch) and top-down prior knowledge about streams. In multi-talker environment, the brain can segregate different speakers in 100 ms auditory cortex. Here, we used magnetoencephalographic (MEG) recordings to investigate temporal spatial signature of how utilizes 2 speech from same speaker, which hardly be separated based on cues. primed condition, participants...

Heterogeneous Networks (HetNet) have been recognized as a key enabler for providing high data rates. However, co-channel deployed HetNet will experience inter-layer interference, and hence calls use of enhanced Inter-Cell Interference Coordination (eICIC) to solve such interference problems. In order achieve the full performance benefits eICIC, its corresponding configuration parameters shall be carefully adjusted. this paper we study how sensitive is different eICIC in scenarios, provide...

Fractional path loss compensated power control (FPC) is adopted in LTE systems for the proper setting of User Equipment (UE) transmit power. The benefit FPC has been extensively studied homogeneous networks with only macro-cells. When additional small cells are co-channel deployed to form a heterogeneous (HetNet), new challenges imposed uplink control. In this paper, we first exploit several available measurements at base station (BS) and/or UE improve performance FPC. Afterwards, framework...

Wireless transmission based on cooperation promises to bring performance improvements in multi-node networks. Several cooperative schemes have appeared the literature, and most cases been assessed under simplified assumptions for channel model. Experimental data are difficult obtain because they should provide simultaneous characterization of at least three links. In this paper we present measurements that involve two access points (APs) user terminals, each which is equipped with 4...

In this paper we propose a non-contention based mechanism for allocation of the spectral resources by several interfering Home e-NodeBs (HeNBs) deployed same or different operators, potentially in random manner given geographical area. The proposed facilitates from common pool on individual traffic requirements HeNBs, thereby enabling Flexible Spectrum Usage (FSU). It ensures coexistence HeNBs area partially completely preventing mutual interference shared spectrum. A significant gain both...

The impact of high power amplifier (HPA) on the performance orthogonal frequency division multiplexing (OFDM) based wireless systems using link adaptation (LA) is analyzed in this work. LA maximizes throughput while maintaining a target bit error rate (BER) at receiver. non linear behaviour HPA introduces distortion OFDM signal which has peak to average ratio (PAPR). It found work that causes schemes fail meet BER. shown make system satisfy BER constraint, noise thresholds for changing...

In a multi-component carrier LTE-Advanced system, user can simultaneously be scheduled on all component carriers (CCs). For the base station to perform radio channel aware packet scheduling, each ideally has feedback information corresponding CCs. This results in potentially high amount of uplink overhead. Furthermore, power limited situation may experience outage because insufficient for required feedback. this paper we first propose several techniques at different layers overhead...