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Institution

Huawei

CompanyShenzhen, China
About: Huawei is a company organization based out in Shenzhen, China. It is known for research contribution in the topics: Terminal (electronics) & Node (networking). The organization has 41417 authors who have published 44698 publications receiving 343496 citations. The organization is also known as: Huawei Technologies & Huawei Technologies Co., Ltd..


Papers
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Journal ArticleDOI
TL;DR: Simulation results show that the proposed approach can effectively exploit beneficial cooperation, thereby improving system performance and shedding some light on the tradeoff between multi-user diversity gain at the physical layer and the helper contention overhead at the MAC layer.
Abstract: In this paper, we study medium access control (MAC) protocol design for distributed cooperative wireless networks. We focus on beneficial node cooperation by addressing two fundamental issues of cooperative communications, namely when to cooperate and whom to cooperate with, from a cross-layer protocol design perspective. In the protocol design, taking account of protocol overhead we explore a concept of cooperation region, whereby beneficial cooperative transmissions can be identified. We show that a rate allocation in the cooperation region provides higher link utilization than in a non-cooperation region. To increase network throughput, we propose an optimal grouping strategy for efficient helper node selection, and devise a greedy algorithm for MAC protocol refinement. Analysis of a successful transmission probability with cooperative or direct transmission is presented. Simulation results show that the proposed approach can effectively exploit beneficial cooperation, thereby improving system performance. Further, analytical and simulation results shed some light on the tradeoff between multi-user diversity gain at the physical layer and the helper contention overhead at the MAC layer.

112 citations

Proceedings ArticleDOI
02 Jun 2014
TL;DR: This paper elaborates on the challenges that still need to be solved to render FBMC an eligible candidate as fundamental technology for 5G mobile radio and presents some first approaches towards practical solutions.
Abstract: Scenarios envisaged for mobile communication systems beyond 2020 imply that future applications and services will impose highly diverse requirements on the system design. To appropriately respond to these requirements while ensuring an efficient usage of available spectrum and system resources, the air interface of 5G system is expected to provide much more flexibility compared to today's systems. Filterbank based multi-carrier (FBMC) may be considered a potential enabler for that purpose, as it provides excellent waveform properties with additional degrees of freedom for the system design, thanks to the use of prototype filters that may be adjusted to meet desired system constraints. This paper elaborates on the challenges that still need to be solved to render FBMC an eligible candidate as fundamental technology for 5G mobile radio and presents some first approaches towards practical solutions.

112 citations

Proceedings ArticleDOI
15 May 2016
TL;DR: A multi-dimensional SCMA (MD-SCMA) codebook design based on constellation rotation and interleaving method is proposed for downlink SCMA systems, which outperforms that of the existing SCMA codebooks and low density signature (LDS) in downlink Rayleigh fading channels.
Abstract: Sparse code multiple access (SCMA) is a new non- orthogonal multiple access scheme, which effectively exploits the shaping gain of multi-dimensional codebook. In this paper, a multi-dimensional SCMA (MD-SCMA) codebook design based on constellation rotation and interleaving method is proposed for downlink SCMA systems. In particular, the first dimension of mother constellation is constructed by subset of lattice $\mathbf{Z}^2$. Then the other dimensions are obtained by rotating the first dimension. Further, the interleaving is used for even dimensions to improve the performance in fading channels. In this way, we can design different codebooks for the aim of spectral efficiency or power efficiency. And the simulation results show that the bit error rate (BER) performance of MD-SCMA codebooks outperforms that of the existing SCMA codebooks and low density signature (LDS) in downlink Rayleigh fading channels.

112 citations

Proceedings ArticleDOI
01 Jan 2019
TL;DR: This work proposes a novel scale-aware attention network that can automatically focus on certain global and local scales appropriate for the image, and outperforms other state-of-the-art methods for crowd counting on several benchmark datasets.
Abstract: In this paper, we consider the problem of crowd counting in images. Given an image of a crowded scene, our goal is to estimate the density map of this image, where each pixel value in the density map corresponds to the crowd density at the corresponding location in the image. Given the estimated density map, the final crowd count can be obtained by summing over all values in the density map. One challenge of crowd counting is the scale variation in images. In this work, we propose a novel scale-aware attention network to address this challenge. Using the attention mechanism popular in recent deep learning architectures, our model can automatically focus on certain global and local scales appropriate for the image. By combining these global and local scale attentions, our model outperforms other state-of-the-art methods for crowd counting on several benchmark datasets.

112 citations

Proceedings ArticleDOI
08 May 2013
TL;DR: This work proposes and develops a watermarking mechanism for Android apps, which takes the source code of an app as input to automatically generate a new app with a transparently-embedded watermark and the associated manifest app, and introduces small performance overhead.
Abstract: With increased popularity and wide adoption of smartphones and mobile devices, recent years have seen a new burgeoning economy model centered around mobile apps. However, app repackaging, among many other threats, brings tremendous risk to the ecosystem, including app developers, app market operators, and end users. To mitigate such threat, we propose and develop a watermarking mechanism for Android apps. First, towards automatic watermark embedding and extraction, we introduce the novel concept of manifest app, which is a companion of a target Android app under protection. We then design and develop a tool named AppInk, which takes the source code of an app as input to automatically generate a new app with a transparently-embedded watermark and the associated manifest app. The manifest app can be later used to reliably recognize embedded watermark with zero user intervention. To demonstrate the effectiveness of AppInk in preventing app repackaging, we analyze its robustness in defending against distortive, subtractive, and additive attacks, and then evaluate its resistance against two open source repackaging tools. Our results show that AppInk is easy to use, effective in defending against current known repackaging threats on Android platform, and introduces small performance overhead.

112 citations


Authors

Showing all 41483 results

NameH-indexPapersCitations
Yu Huang136149289209
Xiaoou Tang13255394555
Xiaogang Wang12845273740
Shaobin Wang12687252463
Qiang Yang112111771540
Wei Lu111197361911
Xuemin Shen106122144959
Li Chen105173255996
Lajos Hanzo101204054380
Luca Benini101145347862
Lei Liu98204151163
Tao Wang97272055280
Mohamed-Slim Alouini96178862290
Qi Tian96103041010
Merouane Debbah9665241140
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202319
202266
20212,069
20203,277
20194,570
20184,476