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The 23rd International Technical Conference on Circuits/Systems, Computers and Communications

Session H4  Computer Networks & Communication Theory
Time: 9:00 - 9:54 Tuesday, July 8, 2008
Location: 8F 805 Room
Chairs: Hiroshi Mochizuki (Nihon University, Japan), Kosin Chamnongthai (King Mongkut's University of Technology, Thailand)

H4-1 (Time: 9:00 - 9:18)
TitleFault Tolerance SOAP using TMR Scheme
Author*Wichan Phetmanee, Kajornsak Pongthana (Rajamangala University of Technology Srivijaya, Thailand)
Pagepp. 677 - 680
KeywordSOAP, TMR, Information Redundancy
AbstractA Web services is a software system designed to support interoperable Machine to Machine interaction over a network. Specifically, web services use a common communication based on Simple Object Access Protocol (SOAP) that exchanging Extensible Markup Language (XML) based messages over the world wide with high degree of communication fault and less reliability such as internet. This paper presents the SOAP fault tolerance communication using Triple Modular Redundancy (TMR) and Information Redundancy technique. The results of simulation and the results of experimental show that high level of fault-tolerance is achievable while some of the experimental results show only costing a reasonable time overhead.

H4-2 (Time: 9:18 - 9:36)
TitleA Parent Relay Station Selection for Efficient Grouping in IEEE 802.16j Mobile Multi-hop Relay Network
Author*Jiwon Yoon, Youn-Soo Kim, Hyung Seok Kim (Department of Information and Communication Engineering, Sejong University, Republic of Korea)
Pagepp. 681 - 684
KeywordIEEE802.16, Mobile Multihop Relay, Grouping, WiMAX
AbstractThe IEEE 802.16j task group uses the relay station (RS) for the extension of the coverage of the BS and enhancement of throughput. However, if a number of relay stations in a BS cell, the RSs may result in both more frequent handover and higher co-channel interference. To solve this problem, the grouping is required specified in IEEE 802.16j basement document. The selecting method of parent RS managing the group is not specified in base line document of IEEE 802.16j. We propose how to select the parent node in the RS group.

H4-5 (Time: 9:36 - 9:54)
TitleHierarchical Transmission Algorithm Combined Coding Method in the T-DMB System
Author*Jongtae Bae, Minhyuk Kim, Suksoon Choi, Taedoo Park, Namsoo Kim, Jiwon Jung (Deaprtment of Radio Communication Engineering, Korea Maritime University, Republic of Korea)
Pagepp. 685 - 688
KeywordT-DMB, Hierarchical Modulation, UEP, Bit split method
AbstractT-DMB (Terrestrial Digital Multimedia Broadcasting) system, is based on the Eureka-147 standard, provides various multimedia data services. However T-DMB needs more various services and higher throughput while maintaining reception. Therefore, this paper proposes advanced T-DMB system using the unequal error protection system, hierarchical multi level modulation and various coding scheme which is used for recent wireless communication, while maintaining backward compatibility. As the simulation results, proposed advanced T-DMB system has coding gain of 2~6dB compared to conventional T-DMB.