Nen-Fu Huang

National Tsing Hua University

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Chia-Nan Kao

National Tsing Hua University

Yih‐Jou Tzang

De Lin Institute of Technology

Shiann‐Tsong Sheu

National Central University

Te‐Lung Liu

National Center for High-Performance Computing

Rong-Tai Liu

National Tsing Hua University

Chiung-Shien Wu

Industrial Technology Research Institute

Gin-Kou Ma

Industrial Technology Research Institute

Chung-Ching Chiou

National Tsing Hua University

Hsien-Wei Hung

National Tsing Hua University

Jian-Wei Tzeng

National Taichung University of Science and Technology

Cooperative Institutions

National Tsing Hua University

143

National Yang Ming Chiao Tung University

National Taiwan University

National Cheng Kung University

Industrial Technology Research Institute

Chunghwa Telecom (Taiwan)

National Chung Cheng University

Chang Gung University

Feng Chia University

National Taipei University of Technology

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CAMEL evolution and PPS evaluation

Chung-Hsin Liu Y.C. Chang Nen-Fu Huang Yu-Lun Ling Hom-Jey Jan

This paper first introduces the Customized Applications for the Mobile network Enhanced Logic (CAMEL) architecture, then presents the CAMEL evolution and CAMEL prepaid service (PPS). We model the SCP call processing, which performs the CAMEL PPS call handing functions. The simulation results illustrate the call processing capability under various traffic conditions.

10.1109/inw.2001.915288

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Citations (1)

On the Classification of a Greenhouse Environment for a Rose Crop Based on AI-Based Surrogate Models

RePEc: Research Papers in Economics (2021)

Showkat Ahmad Bhat Nen-Fu Huang Imtiyaz Hussain Farzana Bibi Uzair Sajjad

Rose (mathematics)

Source

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Citations (1)

The P2P Live Media Streaming Technology in Distance Teaching Platform

International Conference on Information Science and Applications (2011)

Yun‐Sheng Yen Yu-Kai Chang J.F. Lin Nen-Fu Huang

Distance learning uses the network digital system to send messages point-to-point or point-to-multipoint. Presently, distance learning has gained remarkable results in universities and colleges. This paper experiments the operation of P2P Live Media Stream, a distance video system based on P2P structure. In addition, we also compare it with Co-Life Video Conferencing System developed by the National Center for High-Performance Computing and Marratech Online Video Conferencing System developed by a subsidiary company of Google. The comparisons focus on the smoothness of video signals, stability, connection recovery and transmission situations. We prove that P2P Live Media Stream is an ideal and feasible system which can be used in campuses. Furthermore, it combines all kinds of video teaching modes and benefits the teaching diversity in campuses.

Videoconferencing

Live Streaming

Smoothness

Video Streaming

10.1109/icisa.2011.5772363

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Citations (1)

A Fast URL Lookup Engine for Content-Aware Multi-Gigabit Switches

Nen-Fu Huang Rong-Tai Liu Chih-Ho Chen Ying-Tsun Chen Li-Wen Huang

Cluster-based servers are one of the best solutions to build high-performance, scalable, and reliable Internet Web servers. A number of researches have been done about enabling the dispatcher in cluster-based Web servers to route the users requests based on higher layer information, such as URLs. Hashing functions and tree structure are often used to achieve the goal of URL lookup, but they may cause the problem of collision and result in unacceptable performance. This paper presents a fast scalable URL lookup mechanism that uses content addressable memory (CAM) as the basic hardware components. Our scheme not only supports exact matching of URL lookup, but also provides prefix-matching lookup ability so that it is very practically for URL content-filtering like systems. The proposed scheme takes constant time to lookup a URL and furnishes a rate of 100 million lookups per second. By applying the entry reuse concept, the expensive CAM space can be used in a more efficient way to store more URLs. With this fast URL lookup engine, the performance of content dispatchers or URL content filters can be greatly improved.

Content-addressable storage

File server

10.1109/aina.2005.23

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Citations (12)

An efficient transmission scheduling algorithm for a wavelength-reusable local lightwave network

Journal of Lightwave Technology (1994)

Nen-Fu Huang Chiung-Shien Wu

Although single-hop star networks based on wave-length division multiplexing (WDM) are attractive owing to their all-optical communication features, the throughput of such lightwave networks is limited due to the small number of available wavelengths. In this paper, a wavelength-reusable local lightwave network that consists of two interconnected WDM star networks is proposed. Based on this architecture, the lower bounds for the problems of minimizing the switching duration and the number of switching modes are derived. A transmission scheduling algorithm for this architecture to efficiently reuse the wavelengths is also proposed. The analytical result shows that the proposed scheduling algorithm always produces solutions close to the lower bounds. Simulation results show that given the same number of users and available wavelengths, the solutions (in terms of the average switching duration and the average number of switching matrices) obtained by the proposed scheduling algorithm on the interconnected WDM networks are better than the optimal solution on a single-star WDM network. In most cases, the performance improvement achieves 20 to 45%.< >

Star network

Frequency-division multiplexing

10.1109/50.301821

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Citations (9)

Solving bandwidth and priority domination problems of DQDB MANs

Computer Communications (1993)

Nen-Fu Huang Shiann‐Tsong Sheu

Dynamic Bandwidth Allocation

Distributed-queue dual-bus

Bandwidth allocation

10.1016/0140-3664(93)90073-2

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Citations (3)

A distributed paths migration scheme for IEEE 802.6 based personal communication networks

Nen-Fu Huang Ko-Shung Chen Gin-Kou Ma

Wireless personal communications will be provided via the usage of microcells in urban areas. The current centralized architecture may be unsuitable with the increased processing load and handoff rate associated with microcells. Some distributed architectures based upon interconnected IEEE 802.6 MANs for wireless personal communications have been proposed recently. The IEEE 802.6 MAN is attractive since it also provides isochronous services which are quite suitable for voice communications. In such a network, a communication path between two mobile terminals may be inefficient due to the lack of better paths when the path is established or become inefficient due to the mobility of terminals, e.g., the path elongates and consumes too much isochronous channels. In this paper, a distributed paths migration scheme is proposed for the IEEE 802.6 based personal communication networks. This distributed scheme automatically recognizes inefficient paths and migrates them to better ones, if any. During the migration, the property of isochronous services is also preserved. The performance of this scheme is evaluated by simulations. Simulation results show that the proposed paths migration scheme dramatically reduces the number of isochronous channels consumed per path. As a result, the call blocking rate is reduced and the number of successful established paths is increased significantly.< >

Personal area network

10.1109/icc.1994.368952

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Citations (0)

A Resource-Efficient Traffic Localization Scheme for Multiple BitTorrents

IEEE International Conference on Communications (2009)

Nen-Fu Huang Yen-Ling Chu C.H. Tsai W.-Z. Huang Wen-Jer Tzeng

The emergence of peer-to-peer (P2P) applications has posed a threat to the operating cost of Internet Service Providers (ISPs) due to the large amount of inter-ISP traffic generated. The problem stems from the mismatch between the P2P overlay network formed randomly and the underlying physical network. Recently, BitTorrent has attracted enormous users by its convenience of large-scale content distribution and has also become a major challenge for ISPs. Therefore, in this paper we proposed an effective B-Proxy scheme to evaluate through realistic simulation on PlanetLab, where hundreds of BitTorrent clients were executed during the experiment. Simulation results show that more than thirty percent of inter-ISP traffic could be saved in a torrent with a relatively small cache size consumed which is only eighth times that of the original file.

BitTorrent

PlanetLab

Overlay network

BitTorrent tracker

Web traffic

10.1109/icc.2009.5198663

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Citations (4)

Some routing problems on Broadband ISDN

Computer Networks and ISDN Systems (1994)

Nen-Fu Huang Chiung-Shien Wu Yi-Jang Wu

Blocking (statistics)