Authentication Vector Management for UMTS

Wu, Lin-Yi ; Lin, Yi-Bing

3G; authentication vector; security function; UMTS core network ; 9

In Universal Mobile Telecommunication System (UMTS), the security function provides mutual authenticity and key agreement between the core network and the Mobile Station (MS). Specifically, the Serving GPRS Support Node (SGSN) in the core network obtains an array of Authentication Vectors (AVs) from the Home Subscriber Server/Authentication Center (HSS/AuC), and consumes one AV for each mutual authentication. After the departure of the MS, the SGSN may keep the unused AVs for ...

© IEEE

MediaTek Inc., Hsinchu ; MediaTek Inc., Hsinchu

2007

en

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS,Volume 6, Issue 11, November 2007 Page(s):4101 - 4107

Push-to-Talk Service for Intelligent Transportation Systems

Gan, Chai-Hien ; Lin, Yi-Bing

Intelligent transportation systems (ITS); push-to-talk (PTT) client; real-time transport protocol (RTP) ; 9

Push to talk (PTT) is a walkie-talkie like service. In this service, several predefined group members participate in one PTT session. At any time, only one group member is allowed to speak. Therefore, a mechanism is required to determine the member that is permitted to speak. In Open Mobile Alliance (OMA), a central arbitrator coordinates the permission to speak among the group members. In the Intelligent Transportation System (ITS) environment, the centralized OMA approach is ...

© IEEE

Nat. Chiao Tung Univ., Hsinchu ; Nat. Chiao Tung Univ., Hsinchu

2007

en

IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS, Volume 8, Issue 3, Sept. 2007 Page(s):391 - 399

Modeling mobility database failure restoration using checkpoint schemes

Sou, Sok-Ian ; Lin, Yi-Bing

Checkpoint; failure restoration; Home Location Register (HLR); Universal Mobile Telecommunications System ; 9

This paper studies checkpointing and failure restoration of mobility database for Universal Mobile Telecommunications System (UMTS). By utilizing per-user checkpointing technique, individual Home Location Register (HLR) records are saved into non-volatile backup storage form time to time. When a failure occurs, the backup record is restored back to the mobility database. We consider three per-user checkpoint schemes for the HLR. An analytic model is developed to investigate these ...

© IEEE

Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao Tung Univ. ; Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao Tung Univ.

2007

en

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, Volume 6, Issue 1, Jan. 2007 Page(s):313 - 319

NTP-SIOT: A test tool for advanced mobile services

Lin, Yi-Bing ; Liang, Ching-Feng ; Chen, Kuei-Hui ; Liao, Hsin-Yu

9

This article describes system design for an Open Mobile Alliance Service Interoperability Test Platform called NTP-SIOT. Based on the TTCN-3 specifications, we show how 4G mobile applications such as OMA multimedia messaging service can be tested in this platform. © 2007 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, including reprinting/republishing this material for advertising or promotional purposes, creating new ...

© IEEE

Nat. Chiao Tung Univ., Hsinchu ; Nat. Chiao Tung Univ., Hsinchu ; Nat. Chiao Tung Univ., Hsinchu ; Nat. Chiao Tung Univ., Hsinchu

2007

en

IEEE Network Volume 21, Issue 1, Jan.-Feb. 2007 Page(s):21 - 26

Background Removal of Multiview Images by Learning Shape Priors

Tsai, Yu-Pao ; Ko, Cheng-Hung ; Hung, Yi-Ping ; Shih, Zen-Chung

Graph cut, image segmentation, Markov random field (MRF), medial axis, multiview images (MVIs), object movie, 3-D modeling, volumetric graph cuts ; 9

Image-based rendering has been successfully used to display 3-D objects for many applications. A well-known example is the object movie, which is an image-based 3-D object composed of a collection of 2-D images taken from many different viewpoints of a 3-D object. In order to integrate image-based 3-D objects into a chosen scene (e.g., a panorama), one has to meet a hard challenge-to efficiently and effectively remove the background from the foreground object. This problem is ...

© IEEE

Nat. Chiao Tung Univ., Hsinchu ; Nat. Chiao Tung Univ., Hsinchu ; Nat. Chiao Tung Univ., Hsinchu ; Nat. Chiao Tung Univ., Hsinchu

2007

en

IEEE TRANSACTIONS ON IMAGE PROCESSING, Volume 16, Issue 10, Oct. 2007 Page(s):2607 - 2616

Adaptive Selection Combining for Soft Handover in OVSF W-CDMA Systems

Lin, Kuo-Jen ; Tseng, Yu-Chee

9

In W-CDMA, soft handover is supported at cell boundaries to maintain communication quality. The maximal ratio combining (MRC) and generalized selection combining (GSC) , are two possible approaches. However, soft handover is resource-intensive. In this letter, we propose an adaptive selection combining (ASC) scheme that can switch flexibly between MRC and GSC so as to take care of both channel loading and communication quality. The signal-to-interference-and-noise ratio (SINR) ...

© IEEE

Dept. of Electr. Eng., Chung Hua Univ. ; Dept. of Electr. Eng., Chung Hua Univ.

2004-11

Text

en

IEEE Communications Letters, Vol. 8, No. 11, Nov. 2004, pp. 656-658

An Adaptive Sniff Scheduling Scheme for Power Saving in Bluetooth

Lin, Ting-Yu ; Tseng, Yu-Chee

9

Bluetooth is expected to be an important basic constructing component for smart homes. In a smart home environment, many devices will be portable and battery-operated, making power saving an essential issue. The authors study the problem of managing the low-power sniff mode in Bluetooth, where a slave is allowed to be awake only periodically. One challenging problem is how to schedule each slave's sniffing period in a piconet so as to resolve the trade-off between traffic and ...

© IEEE

Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao-Tung Univ. ; Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao-Tung Univ.

2002-12

Text

en

IEEE Wireless Communications, Vol. 9, No. 6, Dec. 2002, pp. 92-103

Adaptive Approaches to Relieving Broadcast Storms in a Wireless Multihop Mobile Ad Hoc Network

Tseng, Yu-Chee ; Ni, Sze-Yao ; Shih, En-Yu

9

In a multihop mobile ad hoc network, broadcasting is an elementary operation to support many applications. Previously, it is shown that naively broadcasting by flooding may cause serious redundancy, contention, and collision in the network, which we refer to as the broadcast storm problem. Several threshold-based schemes are shown to perform better than flooding in that work. However, how to choose thresholds also poses a dilemma between reachability and efficiency under different ...

© IEEE

Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao-Tung Univ. ; Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao-Tung Univ. ; Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao-Tung Univ.

2003-05

Text

en

IEEE Transactions on Computers, Vol. 52, No. 5, May 2003, pp. 545-557

Intelligent Evolutionary Algorithms for Large Parameter Optimization Problems

Shinn-Ying Ho ; Li-Sun Shu ; Jian-Hung Chen

Evolutionary algorithm (EA); genetic algorithm (GA); intelligent gene collector (IGC); multiobjective optimization; orthogonal experimental design ; 29

This paper proposes two intelligent evolutionary algorithms IEA and IMOEA using a novel intelligent gene collector (IGC) to solve single and multiobjective large parameter optimization problems, respectively. IGC is the main phase in an intelligent recombination operator of IEA and IMOEA. Based on orthogonal experimental design, IGC uses a divide-and-conquer approach, which consists of adaptively dividing two individuals of parents into pairs of gene segments, economically identifying ...

© IEEE

Department of Biological Science and Technology, Institute of Bioinformatics, National Chiao Tung University, Hsin-Chu, Taiwan ; Department of Information Engineering and Computer Science, Feng Chia University, Taichung, Taiwan ; Department of Information Engineering and Computer Science, Feng Chia University, Taichung, Taiwan

2004-12

en

IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION, VOL. 8, NO. 6, Dec. 2004, pp. 522-541

Designing Structure-Specified Mixed H2/H∞ Optimal Controllers Using an Intelligent Genetic Algorithm IGA

Shinn-Jang Ho ; Shinn-Ying Ho ; Ming-Hao Hung ; Li-Sun Shu ; Hui-Ling Huang

Intelligent genetic algorithm (IGA), mixed H2 H optimal control, orthogonal experimental design (OED). ; 29

This brief proposes an efficient method for designing accurate structure-specified mixed H2 H optimal controllers for systems with uncertainties and disturbance using an intelligent genetic algorithm (IGA). The newly-developed IGA with intelligent crossover based on orthogonal experimental design (OED) is efficient for solving intractable engineering problems with lots of design parameters. The IGA-based method without using prior domain knowledge can efficiently solve design ...

© IEEE

Department of Automation Engineering, National Formosa University, Yunlin 632, Taiwan ; Department of Biological Science and Technology and Institute of Bioinformatics, National Chiao Tung University, Hsinchu 300, Taiwan ; Department of Information Engineering and Computer Science, Feng Chia University, Taichung 407, Taiwan ; Department of Information Management, Overseas Chinese Institute of Technology, Taichung 407, Taiwan ; Department of Information Management, Jin Wen Institute ...

2005-11

en

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 13, NO. 6, Nov. 2005, pp. 1119-1124