The 16th Asia-Pacific Network Operations and Management Symposium最新文献_第9页

Time and frequency transfer system for synchronization applications 用于同步应用的时间和频率传输系统

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996548

Jia-Lun Wang, C. Liao, Huang-Tien Lin

{"title":"Time and frequency transfer system for synchronization applications","authors":"Jia-Lun Wang, C. Liao, Huang-Tien Lin","doi":"10.1109/APNOMS.2014.6996548","DOIUrl":"https://doi.org/10.1109/APNOMS.2014.6996548","url":null,"abstract":"In this paper, we propose a new generation of time and frequency transfer system using Global Navigation Satellite System (GNSS) dual frequency receiver for the purpose of both time and frequency synchronization. The system can be used as a timing source, remote time and frequency calibration, and to monitor the characteristic of the telecommunication primary reference clocks (PRC). A series of experiments were conducted to evaluate the performance of the system. The common-view common-clock test was studied for the evaluation of the system noise level. The tests of short-baseline about 20 km between Chunghwa Telecommunication Laboratories (TL) and telecommunication facilities, and long-baseline around 10,000 km between TL and MSL (Measurement Standards Laboratory, New Zealand) were performed. Experimental results indicate that expanded time and frequency uncertainty of the proposed system (with a coverage factor of k=2) are less than 26 ns and 1.1×10-13 (one day averaging), respectively, which can meet ITU-T G.811 standard approximately and requirements for the dominant telecommunication and power system synchronization applications.","PeriodicalId":269952,"journal":{"name":"The 16th Asia-Pacific Network Operations and Management Symposium","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121124582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A QoS supporting ad hoc network protocol combing admission based TDMA and 802.11 DCF 一种QoS支持结合基于TDMA和802.11 DCF的准入的自组织网络协议

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996597

Jing Lin, Celimuge Wu, S. Ohzahata, Toshihiko Kato

引用次数: 7

IPv6 operations and deployment scenarios over SDN 基于SDN的IPv6操作和部署场景

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-12-23 DOI: 10.1109/APNOMS.2014.6996530

Chia-Wei Tseng, Sheue-Ji Chen, Yao-Tsung Yang, Li-Der Chou, C. Shieh, S. Huang

引用次数: 5

Autonomous retransmission control with neighbour terminals for ad hoc networks 自组网中与邻居终端的自主重传控制

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-12-23 DOI: 10.1109/APNOMS.2014.6996593

Taku Yamazaki, R. Yamamoto, T. Miyoshi, Y. Tanaka

{"title":"Autonomous retransmission control with neighbour terminals for ad hoc networks","authors":"Taku Yamazaki, R. Yamamoto, T. Miyoshi, Y. Tanaka","doi":"10.1109/APNOMS.2014.6996593","DOIUrl":"https://doi.org/10.1109/APNOMS.2014.6996593","url":null,"abstract":"In ad hoc networks, radio interference and terminal' mobility can cause frame losses. When the frame losses occur continuously, general datalink layer protocols regard it as a link failure and then notify it to network layer protocols. In conventional routing protocols, a source terminal initiates route discovery process to recover from the link failures on receiving the notifications even if the source terminal still has a valid route to a destination terminal. However, the route discovery requires a route request flooding and the flooding may consume limited network resources of ad hoc networks and that also degrades transmission efficiency. For solving the problems, several retransmission and relay control methods have been proposed. In these methods, neighbour terminals of a transmission route overhear transmitted frames and retransmit lost frames autonomously by using the overheard frames. However, the conventional retransmission methods have a disadvantage that they degrade the transmission efficiency under bursty frame loss interval. Moreover, conventional relay control methods suffer from a processing overhead and a slow adaptation problem under a sparse frame loss. In this paper, we propose an efficient and lightweight method that neighbour terminals adaptively retransmit lost frames considering a frequency of the losses. Computer simulations clarify the performances and the effectiveness of the proposed method.","PeriodicalId":269952,"journal":{"name":"The 16th Asia-Pacific Network Operations and Management Symposium","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123810311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of information-centric networking in mobile and distributed environment using wide-area test bed 利用广域试验台对移动和分布式环境下的信息中心网络进行评估

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-12-23 DOI: 10.1109/APNOMS.2014.6996547

D. Matsubara, S. Okamoto, N. Yamanaka, Tatsuro Takahashi

引用次数: 2

Performance analysis and validation of high QoS route navigation for mobile users 移动用户高QoS路由导航的性能分析与验证

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-12-23 DOI: 10.1109/APNOMS.2014.6996570

Kenji Kanai, J. Katto, T. Murase

引用次数: 0

In-network guide performance in wireless multi-hop cache networks 无线多跳缓存网络的网内导引性能

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-09-01 DOI: 10.1109/APNOMS.2014.6996590

Kento Ikkaku, Yukio Sakaguchi, M. Yamamoto

引用次数: 2

A performance comparison of in-memory Virtual Desktop Environment 内存虚拟桌面环境的性能比较

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-09-01 DOI: 10.1109/APNOMS.2014.6996592

Dai Hoang Tran, Tien-Dung Nguyen, E. Huh, C. Hong

引用次数: 0

A load balance algorithm based on nodes performance in Hadoop cluster Hadoop集群中基于节点性能的负载均衡算法

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-09-01 DOI: 10.1109/APNOMS.2014.6996555

Zhipeng Gao, Dan-qian Liu, Yang Yang, Jingchen Zheng, Yuwen Hao

{"title":"A load balance algorithm based on nodes performance in Hadoop cluster","authors":"Zhipeng Gao, Dan-qian Liu, Yang Yang, Jingchen Zheng, Yuwen Hao","doi":"10.1109/APNOMS.2014.6996555","DOIUrl":"https://doi.org/10.1109/APNOMS.2014.6996555","url":null,"abstract":"MapReduce is an important distributed programming model for large-scale data-parallel applications like web indexing, data mining, and scientific simulation. Hadoop is an open-source implementation of MapReduce and it is often applied to short jobs for which low response time is critical. When the cluster nodes are homogeneous, Hadoop has a good performance. In practice, the homogeneity assumptions do not always hold. In heterogeneous environment, there are various devices which vary greatly in the capacities of computation, communication, architectures, memories and power. When different nodes process the same amount of data, load balancing problem occurs. In this paper we address the problem of how to assign data after Map phase to balance the execution time of each Reduce task by proposing a novel load balancing algorithm based on nodes performance (LBNP), in which the input data of poor performance nodes are decreased. Simulation results indicate that all the Reduce tasks can be completed in the same time which shortens the whole Reduce phase. Thus the efficiency of MapReduce is improved.","PeriodicalId":269952,"journal":{"name":"The 16th Asia-Pacific Network Operations and Management Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114729738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Network dimensioning methodology in packet-optical transport network 分组光传输网络中的网络量纲方法

The 16th Asia-Pacific Network Operations and Management Symposium Pub Date : 2014-09-01 DOI: 10.1109/APNOMS.2014.6996103

Jieun Lee, Byoungkwon Shim

引用次数: 2