ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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22.72
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • A Proposal of Local Area Gigabit Link Services
    Ken'iti ARAI, Jun SASAKI
    Article type: Article
    Pages 1-6
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A production of moving picture and medical fields requires extremely high-quality image transmissions. This paper showed video transmission technologies in these industries to integrate high-quality images with high-speed networks. We indicated a possibility of gigabits-level image communication from existing state of computer network technologies and a need for high-speed wide-area network. A gigabits-level local area network platform and services for limited high-end users using high-quality images were proposed in this paper.
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  • Dynamic DNS for Regional PC Communication System : Dynamic DNS based on MAC Address
    Kazunari Irie, Gen-ichi Nishio
    Article type: Article
    Pages 7-12
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_7
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We have researched a regional Personal-Computer (PC) communication network system to provide group communication services to regional community members cost-effectively. Any protocol including IP can be used in the system, because bridging services or LAN environments are provided to users where Ethernet packets are transferred. Private IP addresses are used independently in each region. A new dynamic DNS that simplifies the user setting and also makes good use of address resources is proposed. A DNS server is connected with a DHCP server by using MAC addresses which are applied group communication.
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  • A Development of a Failure-Resistant ATM Transport Method For High-Quality Video Transmission Services
    Yukiharu KANAYAMA, Kazuhiro FUJIHARA, Toshinori TSUBOI
    Article type: Article
    Pages 13-19
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This paper reports a development of a failure-resistant ATM transport method for real-time applications (FRAT-RA). The FRAT-RA method can prevent not only cell losses but also cell delay variations(CDV) even after a network failure in ATM networks. First, the outline of the FRAT-RA method is introduced and its requirements for high-quality video transmission is discussed. Next, the configuration of a new FRAT-RA prototype system are discribed. Finally, evaluation results by usign this prototype system are presented. These results show that high-quality video transmission services on ATM networks can be achieved with the FRAT-RA method.
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  • An ATM Access System Architecture Using the Standardized ATM-PDS Interface
    Hiroshi Nakamoto, Yoshio Kajiyama, Shinichiro Chaki, Hideki Kasahara, ...
    Article type: Article
    Pages 21-28
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_21
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We present an ATM access system that offers various services economically. The system has the ATM-PDS interface that complies with ITU-T Rec.G.983 to realize access networks for multimedia services efficiently and cost-effectively. It has the ATM cell priority control function such as DBR, SBR, GFR and so on to transmit ATM cells efficiently in various services. It has the VB5 interface that complies with ITU-T Rec.G.967 to realize an efficient transmit line utilization between it and a service node.
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  • An OFDM mode detector for ISDB-T
    Hiroshi Nogami, Sadao Tsuruga
    Article type: Article
    Pages 29-36
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_29
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The OFDM transmission mode, namely, the effective symbol duration and the guard interval, should be promptly detected to realize a flexible digital terrestrial TV system where broadcasters transmit various mode signals based on the required bit rates and their geometrical environments. Since September 1998,four modes have been newly added to the ISDB-T specification, and as a result the 12 mode signals are possible in the air. This paper presents a new OFDM mode detector for the 12 modes which does not require to demodulate any OFDM signal. The hardware complexity is reduced, compared to the conventional detector. Computer simulation has been conducted and the numerical results show that the detection error rate of 10^<-2> can be achieved at C/N of -3dB with the observation period of 3 maximum-symbol-lengths for the AWGN channel. Also the results show that the same detection error rate can be achieved at 0dB with the observation period of 8 maximum-symbol-lengths for the 2-path fading channel with D/U=0dB, f_d=50Hz, and τ=2.46μs.
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  • Distortion power of OFDM signal generated by PA with nonlinear characteristics
    Kazuhiro TAKAHASHI, Yukio TATSUMI
    Article type: Article
    Pages 37-42
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_37
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This paper describes the analysis of the distortion power which is generated by the PA with third-order nonlinear characteristics when the OFDM signal passes through it. As a result. the distortion power in band is distributed 80% from the total distortion power under the condition with a large number of carriers. And then, C/N is calculated in regarding the distortion in band as noise, and expressed C/N as functions of backoff and IM.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: December 18, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.72.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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