Virtual reality (VR) over wireless is emerging as an important use case of 5G networks. Fully-immersive VR experience requires the delivery huge data at ultra-low latency, thus leading to ultra-high transmission rate requirement for communications. This challenge can be largely addressed by recent network architecture known mobile edge computing (MEC) network, which enables caching and capabilities paper presents a novel MEC-based framework that able cache parts field views (FOVs) in advance...

Various autonomous or assisted driving strategies have been facilitated through the accurate and reliable perception of environment around a vehicle. Among commonly used sensors, radar has usually considered as robust cost-effective solution even in adverse scenarios, e.g., weak/strong lighting bad weather. Instead considering to fuse unreliable information from all available pure data becomes valuable alternative that is worth exploring. In this paper, we propose deep object detection...

This paper presents a radio resource control (RRC) scheme for OFDMA systems where dynamic allocation is realized at both network controller (RNC) and base stations (BSs). The semi-distributed in the sense that RRC decision split between RNC BSs. makes on which channel used by BS super-frame level BSs then make user assigned to frame-level. Two optimization problems are formulated computationally efficient algorithms perform function of interference avoidance traffic/channel adaptation...

In this article, we present the notion of "mobile 3C systems" in which communications, computing, and caching (i.e., 3C) make up three primary resources/functionalities, akin to colors, a mobile system. We argue that future networks, roles computing are as intrinsic essential only collective usage these resources can support sustainable growth systems. By defining their canonical forms, reveal important fact affects system performance by introducing non-causality into system, whereas...

The fast growing wireless data traffics have brought a significant burden on the mobile cellular network and would soon cause severe congestion in near future. In this paper, we contribute to design theoretical understanding of push-based content delivery converged broadcasting relieve burden. Specifically, are interested analyzing scheme which most popular contents pushed through alleviate bottleneck. This strategy not only offloads multimedia from network, but also improves user experience...

Millimeter-wave radars are being increasingly integrated into commercial vehicles to support new advanced driver-assistance systems by enabling robust and high-performance object detection, localization, as well recognition - a key component of environmental perception. In this paper, we propose novel radar multiple-perspectives convolutional neural network (RAMP-CNN) that extracts the location class objects based on further processing range-velocity-angle (RVA) heatmap sequences. To bypass...

Radar is usually more robust than the camera in severe driving scenarios, e.g., weak/strong lighting and bad weather. However, unlike RGB images captured by a camera, semantic information from radar signals noticeably difficult to extract. In this paper, we propose deep object detection network (RODNet), effectively detect objects purely carefully processed frequency data format of range-azimuth heatmaps (RAMaps). Three different 3D autoencoder based architectures are introduced predict...

The probability that a failure will occur before the end of computation increases as number processors used in high performance computing application increases. For long running applications using large processors, it is essential fault tolerance be to prevent total loss all finished computations after failure. While checkpointing has been very useful tolerate failures for time, often introduces considerable overhead especially when modify amount memory between checkpoints and large. In this...

In this paper, we present a novel mobile edge computing (MEC) model where the MEC server has input and output data of all computation tasks communicates with multiple caching-and-computing-enabled devices via shared wireless link. Each task request can be served from local caching, without caching or downloading, each which incurs unique bandwidth requirement multicast Aiming to minimize transmission bandwidth, optimize joint policy at subject latency, power constraints. The optimization...

In orthogonal frequency-division multiplexing (OFDM) communications, carrier frequency offset must be estimated and compensated at the receiver to maintain orthogonality. this paper, we examine performance of a blind estimation algorithm for OFDM Experiments were conducted on system operating close 2 Mbits/s. Insights obtained from these experiments provided motivation explore fundamental relationships between estimator multiple parameters such as signal-to-noise ratio, number data samples,...

We study the problem of finding an optimal subcarrier and power allocation strategy for downlink communication to multiple users in OFDM based wireless system. formulate minimizing total consumption with constraints on BER transmission rate requiring different classes service, derive simple algorithms which perform well. divide larger joint into two steps. In first step, number subcarriers that each user is determined users' average SNR. Numerical results demonstrate proposed low complexity...

Efficient exploitation of spatial diversity is fundamentally important to resource critical wireless applications (Tsoulos 1999). In this paper, we first study the performance intelligent scheduling for space-division multiple-access (SDMA) networks (Suard 1998, Farsakh 1998). Based on existing scheme, propose a new medium access protocol (MAC) multimedia SDMA/time-division (TDMA) packet (Xu 1994, Ward 1993). The improved performs based users' characteristics and quality-of-service...

In this letter, a novel decode-and-forward (DF) strategy for the two-way relay over Rayleigh fading channels is presented and analyzed. By encoding two messages jointly at node, proposed scheme (termed DF-JM) can effectively handle matched or unmatched data rates from sources. addition, it possible to design optimal constellation labeling maps so that minimum Euclidean distance among desired points be maximized side-information based demodulation destinations. Simulation results indicate...

Sparse code multiple access (SCMA) is a promising multiplexing approach to achieve high system capacity. In this paper, we develop novel iterative detection and decoding scheme for SCMA systems combined with Low-density Parity-check (LDPC) decoding. particular, decompose the output of message passing algorithm (MPA) based multiuser into intrinsic part prior part. Then design joint which iteratively exchanges information between detector decoder, yielding satisfied performance gain. Moreover,...

We investigate a wireless energy harvesting and information transfer protocol in cognitive relay networks, where an secondary network shares the spectrum as well harvests by assisting primary transmission. In particular, transmitter scavenges from received signal then forwards resulting signals along with signal. The receiver can also harvest ambient energy, use remaining to remove interference. analytically derive exact expressions of outage probabilities for both networks. Based on...

In this paper, the three-dimensioned (3D) hybrid beamforming is designed for terahertz (THz) based broadband broadcasting communication system with beam squint. Specifically, full-dimensional THz massive multiple input output (M-MIMO) channel model and array gain of uniform planar (UPA) are first analyzed in context squint effect. Then, a 3D architecture proposed by leveraging two-tier true time delay (TTD), which able to combat effect from horizontal vertical directions. To further reduce...

Previous studies showed that multiuser detection in code-division multiple-access (CDMA) communications can be performed without explicit knowledge of users' channel characteristics a frequency-selective fading environment. However, the computations these blind approaches are an order magnitude higher than existing adaptive minimum output energy (MOE) receivers which require at least desired user's response. Although high-complexity problem alleviated by constrained filtering, tradeoff is...

This paper presents an OFDMA radio resource control (RRC) scheme where dynamic allocation is realized at both a network controller (RNC) and base stations (BTSs). The semi-distributed in the sense that RNC coordinates mutual interference (inter-cell) super-frame level, whereas each BTS makes faster frame-level channel assignment decision based on resources' utility value to users. Another contribution of set computationally efficient algorithms perform BTSs. Simulations show algorithm yields...

This paper considers random wireless sensor networks where nodes are distributed randomly and form clusters to transmit the packets relay using cooperative multi-input-multi-output (CMIMO) technique. First, we study CMIMO energy consumption divide it into intra-cluster inter-cluster consumption. Then focus on analyzing system performance in terms of overall packet error rate (PER) Based metrics, propose a new node sleep strategy, is minimized by coordinating transmitting number activation....

Storing the popular contents in caches to enable frequency reuse, wireless cooperative caching approach offers an exciting new way unleash ultimate potential of networks. In this paper, we formulate optimal problem minimize energy consumption network by considering some important constraints, including limited storage capacity, content popularity and access protocol. A sub-optimal strategy is then proposed handle placement caches, reducing consumption. Simulation results show that scheme has...

Energy harvesting is an efficient method for extending the lifetime of energy-constrained networks. In this paper, we develop a wireless energy and information transfer protocol in cognitive two-way relay networks, which secondary network scavenges from ambient signals primary while shares spectrum by assisting transmission. particular, two users exchange through user firstly harvests received then uses harvested to forward remaining along with signals. The exact expressions outage...

Enforcing security on various implementations of OAuth in Android apps should consider a wide range issues comprehensively. differ from the recommended specification due to provider and platform factors, varied often become vulnerable. Current vulnerability assessments these are ad hoc lack systematic manner. As result, insecure still widely used situation is far optimistic many mobile app ecosystems.