Showing 1-25 of 228 resultsfor "Authors":"Changsheng Xie"
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Balanced P-Code: A RAID-6 Code to Support Highly Balanced I/Os for Disk Arrays
2014 9th IEEE International Conference on Networking, Architecture, and Storage
Year: 2014 | Conference Paper |
There exist numerous erasure codes for RAID-6, of which MDS codes are popular due to the optimal storage efficiency. Although vertical MDS codes have better load balancing compared to horizontal MDS codes, unbalancing problem still exists in some vertical codes, e.g., P-Code. To address this issue, we propose a novel efficient RAID-6 code to support highly balanced I/Os among disk arrays - Balance...Show More
RAID-6 is widely applied to tolerate double concurrent disk failures in both disk arrays and storage clusters. Among numerous erasure codes developed to implement RAID-6, Maximum Distance Separable (MDS) Codes are highly popular. Owing to the limitation of parity generating schemes used in MDS codes, RAID-6-based storage systems suffer from unbalance I/Os and low reconstruction performance. Out of...Show More
A Dynamic Performance-Based Flow Control Method for High-Speed Data Transfer
New types of specialized network applications are being created that need to be able to transmit large amounts of data across dedicated network links. TCP fails to be a suitable method of bulk data transfer in many of these applications, giving rise to new classes of protocols designed to circumvent TCP's shortcomings. It is typical in these high-performance applications, however, that the system ...Show More
A simple simulation environment for calculating the Video Destruction Level of Internet Certification Service
2013 IEEE Third International Conference on Information Science and Technology (ICIST)
Year: 2013 | Conference Paper |
In Internet Certification Service (ICS), we use the content associated sensitive data extraction technology to increase the security of High Definition video copyright for ICS disc. An important item of ICS is to evaluate the Video Destruction Level (VDL) after extracting sensitive data. This paper presents a flexible and easy simulation environment to calculate the VDL based on DirectShow and Mat...Show More
Scale-RS: An Efficient Scaling Scheme for RS-Coded Storage Clusters
Jianzhong Huang;Xianhai Liang;Xiao Qin;Ping Xie;Changsheng Xie
It is indispensable to scale erasure-coded storage clusters to meet requirements of increased storage capacity and I/O performance. In this study, we propose an efficient scaling scheme for Reed-Solomon-coded storage clusters called Scale-RS, which has three salient features. First, Scale-RS achieves uniform data distribution by equally placing data blocks among old and new chunks using a transpos...Show More
Activity Recognition as a Service for Smart Home: Ambient Assisted Living Application via Sensing Home
Xiaohu Fan;Qubo Xie;Xuebin Li;Hao Huang;Jian Wang;Si Chen;Changsheng Xie;Jiajing Chen
2017 IEEE International Conference on AI & Mobile Services (AIMS)
Year: 2017 | Conference Paper |
Cited by: Papers (13)
An aging population has inspired the marketing of advanced real-time ambient assisted living solutions. However, the accurate collection of behavior information, recognition of human activities and implementation of this scheme in a real living environment is a challenging task. In this paper, we propose a feasible extended framework which is compatible with common devices and protocols. Specifica...Show More
V2-Code: A new non-MDS array code with optimal reconstruction performance for RAID-6
2013 IEEE International Conference on Cluster Computing (CLUSTER)
Year: 2013 | Conference Paper |
Cited by: Papers (6)
RAID-6 is widely used to tolerate concurrent failures of any two disks in both disk arrays and storage clusters. Numerous erasure codes have been developed to implement RAID-6, of which MDS Codes are popular. Due to the limitation of parity generating schemes used in MDS codes, RAID-6-based storage systems suffer from low reconstruction performance. To address this issue, we propose a new class of...Show More
Characterizing the Reliability and Threshold Voltage Shifting of 3D Charge Trap NAND Flash
Weihua Liu;Fei Wu;Meng Zhang;Yifei Wang;Zhonghai Lu;Xiangfeng Lu;Changsheng Xie
2019 Design, Automation & Test in Europe Conference & Exhibition (DATE)
Year: 2019 | Conference Paper |
Cited by: Papers (33)
3D charge trap (CT) triple-level cell (TLC) NAND flash gradually becomes a mainstream storage component due to high storage capacity and performance, but introducing a concern about reliability. Fault tolerance and data management schemes are capable of improving reliability. Designing a more efficient solution, however, needs to understand the reliability characteristics of 3D CT TLC NAND flash. ...Show More
Lifetime adaptive ECC in NAND flash page management
Shunzhuo Wang;Fei Wu;Zhonghai Lu;You Zhou;Qin Xiong;Meng Zhang;Changsheng Xie
Design, Automation & Test in Europe Conference & Exhibition (DATE), 2017
Year: 2017 | Conference Paper |
Cited by: Papers (16)
NAND flash memory has decreasing storage reliability, as the density or program/erase (P/E) cycle increases. To ensure data integrity, error correction codes (ECCs) are widely employed and typically stored in the out-of-band area (OOB) of flash pages. However, the worst-case oriented ECC is largely under-utilized in the early stage (small P/E cycles), and the required ECC redundancy may be too lar...Show More
Modeling of Threshold Voltage Distribution in 3D NAND Flash Memory
Weihua Liu;Fei Wu;Jian Zhou;Meng Zhang;Chengmo Yang;Zhonghai Lu;Yu Wang;Changsheng Xie
2021 Design, Automation & Test in Europe Conference & Exhibition (DATE)
Year: 2021 | Conference Paper |
Cited by: Papers (14)
3D NAND flash memory faces unprecedented complicated interference than planar NAND flash memory, resulting in more concern regarding reliability and performance. Stronger error correction code (ECC) and adaptive reading strategies are proposed to improve the reliability and performance taking a threshold voltage (Vth) distribution model as the backbone. However, the existing modeling methods are c...Show More
DIM Moving Target Detection using Spatio-Temporal Anomaly Detection for Hyperspectral Image Sequences
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium
Year: 2018 | Conference Paper |
Cited by: Papers (14)
Dim moving target detection from hyperspectral image sequences, which contains temporal information as well as spectral information, has attracted researchers' interest for its crucial role in civil and military application. In this paper, we propose a novel spatio-temporal anomaly approach to solve the dim moving target detection problem. This approach calculates spatial anomaly map, temporal ano...Show More
Program error rate-based wear leveling for NAND flash memory
2018 Design, Automation & Test in Europe Conference & Exhibition (DATE)
Year: 2018 | Conference Paper |
Wear leveling scheme has became a fundamental issue in the design of Solid State Disk (SSD) based on NAND Flash memory. Existing schemes aim to equalize the number of programming/erase (P/E) cycles and memory raw bit error rates (BER) among all the flash blocks. However, due to fabrication process variation, different blocks of the same flash chip usually have largely different endurance in terms ...Show More
BeLDPC: Bit Errors Aware Adaptive Rate LDPC Codes for 3D TLC NAND Flash Memory
Meng Zhang;Fei Wu;Qin Yu;Weihua Liu;Lanlan Cui;Yahui Zhao;Changsheng Xie
2020 Design, Automation & Test in Europe Conference & Exhibition (DATE)
Year: 2020 | Conference Paper |
Cited by: Papers (8)
Three-dimensional (3D) NAND flash memory has high capacity and cell storage density by using the multi-bit technology and vertical stack architecture, but degrading data reliability due to high raw bit error rates (RBER) caused by program/erase (P/E) cycles and retention periods. Low-density parity-check (LDPC) codes become more popular error-correcting technologies to improve data reliability due...Show More
A novel optimization algorithm for Chien search of BCH Codes in NAND flash memory devices
2015 IEEE International Conference on Networking, Architecture and Storage (NAS)
Year: 2015 | Conference Paper |
Cited by: Papers (6)
As NAND flash memory chips become denser, they are more vulnerable to random errors caused by ageing, read or write interference, and erase operations. These errors compromise both the data integrity and lifetime of flash memory so that error correction codes (ECC) are employed by the flash controller to strengthen the fault tolerance. The BCH (Bose Chaudhuri Hochquenghem) code is a widely used EC...Show More
VaLLR: Threshold Voltage Distribution Aware LLR Optimization to Improve LDPC Decoding Performance for 3D TLC NAND Flash
2019 IEEE 37th International Conference on Computer Design (ICCD)
Year: 2019 | Conference Paper |
Cited by: Papers (4)
Low-density parity-check (LDPC) codes have been widely adopted in NAND flash in recent years to improve data reliability. However, their error-correction capability degrades due to inaccurate log-likelihood ratio (LLR). To improve LLR accuracy of LDPC decoding, this paper proposes a threshold voltage distribution aware LLR optimization scheme, called VaLLR. Firstly, we build a threshold voltage di...Show More
Research and Design of an Attribute-managed Storage-cluster Based on TCP/IP Network
2007 IFIP International Conference on Network and Parallel Computing Workshops (NPC 2007)
Year: 2007 | Conference Paper |
With the growing scale of storage system, its requirements of performance, reliability, availability, and security are getting more and more complicated. The costs to manage storage systems will keep increasing and finally be higher than the systems themselves if this trend continues. Thus, intelligent and self-managing systems are required to automatically address the needs of these requirements....Show More
Double change detection method for moving-object segmentation based on clustering
2006 IEEE International Symposium on Circuits and Systems (ISCAS)
Year: 2006 | Conference Paper |
Cited by: Papers (4)
In this paper, an efficient moving object segmentation algorithm in the wavelet domain is proposed using three successive frames. The change detection method, which employs fuzzy C-means clustering technique to classify motion features of four wavelet sub-bands, is used twice to separate significant change pixels in the wavelet domain from the background. After applying the intersect operation, th...Show More
An Adaptive Cache Management Using Dual LRU Stacks to Improve Buffer Cache Performance
2008 IEEE International Performance, Computing and Communications Conference
Year: 2008 | Conference Paper |
Cache plays an essential role in modern computer systems to smooth the performance gap between memory and CPU. Most existing cache replacement algorithms use three stacks: recency stack, frequency stack and history stack. The balance and design of those stacks is a key to achieve high hit ratio, thus improving the buffer cache efficiency. In this paper we propose a new cache replacement algorithm,...Show More
Prediction for Wireless Traffic with Long Range Burstiness
2008 4th IEEE International Conference on Circuits and Systems for Communications
Year: 2008 | Conference Paper |
Cited by: Papers (4)
Recently many studies have found that the self-similarity in nature brings about the long range burstiness of the traffic across the wide range of time scales. The updated experimental evidences reveal that the heavy tailness is the key cause for the self-similar of the network traffic. Future fourth-generation (4G) wireless networks will be characterized by a 3G core network architecture. The mul...Show More
The Design and Implementation of WiMAX Base Station MAC Based on Intel Network Processor
2008 International Conference on Embedded Software and Systems Symposia
Year: 2008 | Conference Paper |
Cited by: Papers (3)
The paper provides WiMAX BS (base station) MAC design, implementation discussion with performance analysis based on Intel IXP2350, which include MAC design key issues discussion, base station usage model and architecture, MAC hardware and software high level design and relevant performance analysis. Especially, the WiMAX base station is user-specific, and WiMAX MAC software is one of the most impo...Show More
A Novel Web Service Composition Recommendation Approach Based on Reliable QoS
2013 IEEE Eighth International Conference on Networking, Architecture and Storage
Year: 2013 | Conference Paper |
Cited by: Papers (3)
Quality of Service (QoS) play very important role in web service recommendation system. The precision of service recommendation depends on the credible QoS. So people begin to find better method for calculating the credibility of QoS. We can count the execution result and user comment to calculate the QoS credibility of single web service. But how to calculate the QoS credibility of web service co...Show More
INBI: An Improved Network-Based Inference Recommendation Algorithm
2012 IEEE Seventh International Conference on Networking, Architecture, and Storage
Year: 2012 | Conference Paper |
Cited by: Papers (3)
Personal recommendation based on bipartite network has gained sustained attention in recent years due to its performance outperforms the traditional collaborative filtering approach, and it is rapidly becoming an important and promising technology for constructing recommender systems. Current viewpoint is focusing on improving precision of the algorithm. In this paper, we present an improved netwo...Show More
Fast block-matching motion estimation based on an improved cross-diamond search algorithm
2005 12th IEEE International Conference on Electronics, Circuits and Systems
Year: 2005 | Conference Paper |
Cited by: Papers (3)
In block motion estimation, search patterns with different shapes or sizes have a large impact on the searching speed and quality of performance. In this paper, we propose an improved cross-diamond search algorithm (ICDS), using large/small cross-search pattern as the initial step for fast block motion estimation in according to center-biased characteristics of motion-vector distribution. In addit...Show More
Research and Implement of an Encrypted File System Used to NAS
Second IEEE International Security in Storage Workshop
Year: 2003 | Conference Paper |
Cited by: Papers (3)
Data security has become an increasingly important factor in routine work with the development of applications, and users trend to obtain high security with maximum comfort. In this article a cryptographic file system called NAS_CFS used for NAS is designed. NAS_CFS has some characteristics as below: adding encryption function to file-system layer allows users to encrypt data transparently, obtain...Show More
A Pre-buffer Mechanism in Multi-channel P2P Live Streaming
2013 IEEE Eighth International Conference on Networking, Architecture and Storage
Year: 2013 | Conference Paper |
Cited by: Papers (2)
In this paper, we mainly concern about the channel switch delay of multi-channel P2P live streaming system. After study the essential aspects of multi-channel video systems, including channel switching, peer churn, and channel popularity, we develop a new user behavior oriented and content oriented pre-buffer mechanism to improve the user experience in live streaming borrowing the idea of user beh...Show More
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