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Implementation of rate matching with low latency and little memory for LTE turbo code

Journal of Information and Computational Science 2013年第13期10卷 4117-4125页

作者： He, Suqin Hu, Qiaozhi Zhang, Haijun Department of Computer Science and Technology Beijing University of Chemical Technology Beijing 100029 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

In LTE (Long Term Evolution), the high utilization for physical resources is achieved by scheduling suitable number of time frequency resource elements for one user in one subframe. This is supported by the rate matching module that selecting arbitrary number of bits from the turbo coding bit streams. In this paper, a closed-form rate matching implementation method is proposed. It derives an integrated expression which is normalized for the 3 turbo coding streams. This expression sets up a mapping relationship between the bit streams input to and the bit sequence output from rate matching module. Moreover, the expression can be applied to rate de-matching processing in the receiver end. Compared with the existing method, the rate matching method that we proposed generates low latency and requires small memory. © 2013 Binary Information Press.

关键词： Turbo codes

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A universally stable and energy-efficient scheduling protocol for packet switching network

A universally stable and energy-efficient scheduling protoco...

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12th Annual IEEE International Symposium on Network Computing and Applications, NCA 2013

作者： Shi, Yangguang Zhang, Fa Liu, Zhiyong Institute of Computing Technology Chinese Academy of Sciences China University of Chinese Academy of Sciences China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences China

ISBN: (纸本)9780768550436

Energy efficiency is becoming an important issue in networks. Although some research works have been devoted to this topic, only a little attention has been paid to the stability of the network equipped with the energy conservation mechanisms. In fact, we find that the stability of networks can be undermined in the worst case if it isn't considered with care by the energy conservation *** this paper, we propose an energy-efficient scheduling protocol which can guarantee the stability of the network in all cases. We start by building a new model which can be used to verify the stability of the network equipped with the energy conservation mechanisms. With this model, we transform the packet scheduling problem to a Job Shop Scheduling problem. For this problem, we propose a time-stamp based work-conserving scheduling algorithm - G-FSA. Compared with existing methods, this scheduling algorithm guarantees a tighter bound on the make span of the jobs. Then, we integrate G-FSA with a time partition approach to generate our energy-efficient packet scheduling protocol. It is proved that the obtained protocol can guarantee the stability of network in all cases. And its approximation ratio in terms of energy efficiency can be bounded by O((1+ )) for any > 0, where is an input parameter depending on the hardware infrastructure. Typically, 1

关键词： Scheduling algorithms

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Parallelized Jaccard-Based Learning Method and MapReduce Implementation for Mobile Devices Recognition from Massive Network Data

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China Communications 2013年第7期10卷 71-84页

作者：刘军李银周 Felix Cuadrado Steve Uhlig 雷振明 Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Department of Electronic Engineering and Computer Science Queen MaryUniversity of London

The ability of accurate and scalable mobile device recognition is critically important for mobile network operators and ISPs to understand their customers' behaviours and enhance their user *** this paper,we propose a novel method for mobile device model recognition by using statistical information derived from large amounts of mobile network traffic ***,we create a Jaccardbased coefficient measure method to identify a proper keyword representing each mobile device model from massive unstructured textual HTTP access *** handle the large amount of traffic data generated from large mobile networks,this method is designed as a set of parallel algorithms,and is implemented through the MapReduce framework which is a distributed parallel programming model with proven low-cost and high-efficiency *** using real data sets show that our method can accurately recognise mobile client models while meeting the scalability and producer-independency requirements of large mobile network *** show that a 91.5% accuracy rate is achieved for recognising mobile client models from 2 billion records,which is dramatically higher than existing solutions.

关键词： mobile device recognition data mining Jaccard coefficient measurement distributed computing MapReduce

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A reconfigurable routing method for fault-tolerant mesh-based network on chip

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Journal of Information and Computational Science 2013年第1期10卷 157-165页

作者： Liu, Yanhua Ruan, Ying Lai, Zongsheng Sun, Ling Institute of Microelectronics Circuit and System East China Normal University Shanghai 200241 China Jiangsu Provincial Key Lab. of ASIC Design Nantong University Nantong 226019 China State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

As the semiconductor industry advances to nano-technology points, Network on Chip (NoC) components are becoming vulnerable to errors during the system operation. Consequently, fault-tolerant techniques for NoC are needed to achieve high reliability. In this paper, we present a fault-tolerant routing method to tolerate faulty routers in a two-dimension (2D) mesh-based NoC. With this method, the system can have a multi-router fault-tolerant capability and the routing path can be dynamically reconfigured to support different situations caused by faulty routers in NoC. Fault-tolerance capability and system performance of the proposed method are evaluated through analysis and simulations. Theoretical analysis and simulation results show that the proposed method can enhance the reliability of system and offer considerable fault-tolerance capability. © 2013 by Binary Information Press.

关键词： Network-on-chip

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7th Drug hypersensitivity meeting: part two Malaga, Spain. 21-23 April 2016 abstracts

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CLINICAL AND TRANSLATIONAL ALLERGY 2016年第SUPPL 3期6卷 30-30页

作者： [Anonymous] Hospital de la Cruz Roja Madrid Spain Allergy Unit Hospital Central Cruz Roja Madrid Spain Allergy Unit Hospital Central de la Cruz Roja Madrid Spain IIS La Fe Valencia Spain Department of Internal Medicine Faculty of Medicine Celal Bayar University Manisa Turkey Department of Allergy and Immunology Faculty of Medicine Celal Bayar University Manisa Turkey Department of Dermatology Faculty of Medicine Celal Bayar University Manisa Turkey Department of Pathology Faculty of Medicine Celal Bayar University Manisa Turkey Department of Dermatology Chang Gung Memorial Hospital Linkou Taiwan Department of Dermatology Drug Hypersensitivity Clinical and Research Center Chang Gung Memorial Hospital Linkou Taiwan Serviço de Imunoalergologia Centro Hospitalar de São João E.P.E. Porto Portugal Laboratório de Imunologia Faculdade de Medicina Universidade do Porto Porto Portugal Centro Hospitalar de São João Porto Portugal Federal University of São Paulo São Paulo Brazil Federal University of Rio de Janeiro Rio De Janeiro Brazil Pontificia Universidade Católica de Campinas Campinas Brazil Private Practice Goiania Brazil Department of Allergy and Clinical Immunology Ege University Medical Faculty Izmir Turkey Ege University Medical Faculty Izmir Turkey Hospital Central de la Defensa IMIDEF Madrid Spain Centro Hospitalar de Lisboa Central Hospital de Dona Estefânia Lisbon Portugal Faculty of Medicine University hospital University of Monastir Monastir Tunisia Faculty of Medicine and Health Sciences Department of Immunology Allergology Rheumatology and Antwerp University Hospital Immunology Allergology Rheumatology University of Antwerp Antwerp Belgium Allergy Unit Complesso Integrato Columbus Rome Italy IRCCS Oasi Maria S.S. Troina Italy Immunoallergy Department - Hospital de Santa Maria Centro Hospitalar Lisboa Norte Lisbon Portugal Faculdade de Medicina de Lisboa Lisbon Portugal Serviço de Imunoalergologia Hospital de São Bernardo Setúbal Port

Poster walk 11: miscellaneous drug hypersensitivity 2 (P92–P94, P96–P101) P92 16 years of experience with proton pump inhibitors (PPIs) Javier Dionicio Elera, Cosmin Boteanu, Maria Aranzazu Jimenez Blanco, Rosario Gonzalez-Mendiola, Irene Carrasco García, Antonio Alvarez, Jose Julio Laguna Martinez P93 Allergy evaluation of quinolone induced adverse reactions Jaume Martí Garrido, Carla Torán Barona, Carolina Perales Chorda, Ramón López Salgueiro, Miguel Díaz Palacios, Dolores Hernández Fernández De Rojas P94 Bupropion-induced acute urticaria and angioedema, a case report Emre Ali Acar, Ayse Aktas, Aylin Türel Ermertcan, Peyker Temiz P96 Delayed type hypersensitivity and study of cross-reactivity between proton-pump inhibitors Chien-Yio Lin, Chung-Yee Rosaline Hui, Ya-Ching Chang, Chih-Hsun Yang, Wen-Hung Chung P97 Diagnostic work-up in suspected hypersensitivity to proton-pump inhibitors: looking at cross-reactivity Fabrícia Carolino, Diana Silva, Eunice Dias De Castro, Josefina R. Cernadas P98 Management of infusion-related hypersensitivity reactions to enzyme replacement therapy for lysosomal diseases Luis Felipe Ensina, Carolina Aranda, Ines Camelo Nunes, Alex Lacerda, Ana Maria Martins, Ekaterini Goudouris, Marcia Ribeiro, José Francisco Da Silva Franco, Leandra Queiroz, Dirceu Solé P99 Management of insulin allergy with continuous subcutaneous insulin infusion Ceyda Tunakan Dalgiç, Aytül Zerrin Sin, Fatma Düsünür Günsen, Gökten Bulut, Fatma Ömür Ardeniz, Okan Gülbahar, Emine Nihal Mete Gökmen, Ali Kokuludag P100 Off-label use of icatibant for management of serious angioedema associated with angiotensin inhibitors Ana M. Montoro De Francisco, Talía Mª De Vicente Jiménez, Adriana M. Mendoza Parra, Angella M. Burgos Pimentel, Amelia García Luque P101 Thiocolchicoside anaphylaxis: an unusual suspect? Luis Amaral, Fabricia Carolino, Leonor Carneiro Leão, Eunice Castro, Josefina Cernadas Poster walk 12: betalactam hypersensitivity (P102–P111) P102 A curious dela

关键词： Quinolone Allergy

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Luminance and chrominance parallelization of H.264/AVC decoding on a multi-core processor

Luminance and chrominance parallelization of H.264/AVC decod...

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2013 IEEE 8th International Conference on Networking, architecture and Storage, NAS 2013

作者： Meng, Xiaofu Gao, Xiang Yu, Qian Zhang, Shuangshuang Zhang, Xiaochun Huang, Jing Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing China Institute of Computing Technology Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China Loongson Technology Corporation Limited Beijing China

ISBN: (纸本)9780769550343

This paper proposes a novel method to optimizing H.264 decoding on multi-core processors by exploiting color component level parallelism. Compared with sequential decoding and macro-block level parallelism, the proposed method achieves optimal balance between performance and scalability. The optimization scheme is mapped on a 64-bit MIPS multi-core processor, and is evaluated with standard test streams. Experimental results show that the method improves video decoding performance by 2 times on average without increasing memory consumption, and could be easily applied on other multi-core processors. © 2013 IEEE.

关键词： Luminance

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Evaluating Memory Compression and Deduplication

Evaluating Memory Compression and Deduplication

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International Conference on Networking, architecture, and Storage (NAS)

作者： Yuhui Deng Liangshan Song Xinyu Huang Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing PR China Computer science Department Jinan University Guangzhou PR China

Many programs require more RAM to hold their data than a typical computer has. Theoretically, both the compression and deduplication can trade the rich computing capacity for more available RAM space. This paper comprehensively evaluates the performance behaviour of memory compression and memory deduplication by using seven real memory traces. The experimental results give two implications: (1) Memory deduplication greatly outperforms memory block compression. (2) Fixed-size partition (FSP) achieves the best performance in contrast to Content-defined Chunking (CDC) and Sliding Block (SB). The optimal chunking size of FSP is equal to the size of a memory page. The analysis results in this paper should be able to provide useful insights for designing or implementing systems that require abundant memory resources to enhance the system performance.

关键词： Random access memory Memory management Dictionaries Encoding computers Compression algorithms Data compression

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Luminance and Chrominance Parallelization of H.264/AVC Decoding on a Multi-core Processor

Luminance and Chrominance Parallelization of H.264/AVC Decod...

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International Conference on Networking, architecture, and Storage (NAS)

作者： Xiaofu Meng Xiang Gao Qian Yu Shuangshuang Zhang Xiaochun Zhang Jing Huang Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing China Loongson Technology Corporation Limited Beijing China

关键词： Decoding Streaming media Multicore processing Pipelines Video coding Parallel processing Standards

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Optimizing MPI Alltoall communications in multicore clusters

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Jisuanji Yanjiu yu Fazhan/computer Research and Development 2013年第8期50卷 1744-1754页

作者： Li, Qiang Sun, Ninghui Huo, Zhigang Ma, Jie High Performance Computer Research Center Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100039 China

MPI Alltoall is an important collective operation. In multicore clusters, many processes run in a node. On the one hand, shared memory can be adopted to optimize Alltoall communications of small messages by leader-based schemes. However, as these schemes adopt a fixed number of leader processes, the optimal performance can't be obtained for all small messages. On the other hand, processes within a node contend for the same network resource. In Alltoall communications of large messages, many synchronization messages are used. Nevertheless, the contention makes their latency increase many times and the synchronization overhead can't be ingored. To solve these problems, two optimizations are presented. For small messages, the PLP method adopts changeable numbers of leader processes. For large messages, the LSS method reduces the number of synchronization messages from 3N to 2√N. The evaluations prove two methods. For small messages, the PLP method always obtains optimal performance. For large messages, the LSS method brings almost constant improvement percentage. The performance is improved by 25% for 32 KB and 64 KB messages.

关键词： Synchronization

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A Universally Stable and Energy-Efficient Scheduling Protocol for Packet Switching Network

A Universally Stable and Energy-Efficient Scheduling Protoco...

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IEEE International Symposium on Network Computing and Applications

作者： Yangguang Shi Fa Zhang Zhiyong Liu Institute of Computing Technology Chinese Academy of Sciences China Institute of Computing Technology Key Laboratory of Computer System and Architecture Chinese Academy of Sciences China

ISBN: (纸本)9781479906055

Energy efficiency is becoming an important issue in networks. Although some research works have been devoted to this topic, only a little attention has been paid to the stability of the network equipped with the energy conservation mechanisms. In fact, we find that the stability of networks can be undermined in the worst case if it isn't considered with care by the energy conservation *** this paper, we propose an energy-efficient scheduling protocol which can guarantee the stability of the network in all cases. We start by building a new model which can be used to verify the stability of the network equipped with the energy conservation mechanisms. With this model, we transform the packet scheduling problem to a Job Shop Scheduling problem. For this problem, we propose a time-stamp based work-conserving scheduling algorithm - G-FSA. Compared with existing methods, this scheduling algorithm guarantees a tighter bound on the make span of the jobs. Then, we integrate G-FSA with a time partition approach to generate our energy-efficient packet scheduling protocol. It is proved that the obtained protocol can guarantee the stability of network in all cases. And its approximation ratio in terms of energy efficiency can be bounded by O((1+∈ ) α ) for any ∈ > 0, where is an input parameter depending on the hardware infrastructure. Typically, 1

关键词： Protocols Job shop scheduling Scheduling algorithms Stability analysis Approximation methods Energy conservation

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