STUDY ON MULTIMEDIA MOBILE INFORMATION NETWORK

多媒体移动信息网络研究

• 批准号: 07455420
• 负责人: YOSHIDA Susumu
• 金额: $ 1.15万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455420/
• 关键词: Mobile communication; Fading; Interference canceler; Multimedia; Image transmission; Dynamic channel assignment; Asymmetric traffic; バースト誤り; 動画像伝送; 静止画像伝送

Towards the realization of high rate and highly reliable multi-media communication over mobile radio channel, basic key techniques have been studied. Major research results are summarized as follows.・ Interference canceler, not only canceling co-channel interference but also overcoming severe intersymbol interference caused by multipath propagation, has been studied. In particular, trellis coded interference canceler (TCC) and simple yet poweful single-user type interference canceler have been proposed and studied in detail for TDMA and CDMA,respectively.・ A dynamic channel allocation algorithm suitable for integrated traffic consisting of voice and data, for instance, has been proposed. Its superior performance has been verified assuming single slot voice and three slot data traffic.・ A dynamic channel allocation algorithm suitable for an asymmetric channel where up-link and down-link traffic are not balanced has been studied assuming TDMA/TDD system. By allocating more channels to the heavier traffic side between up and down links, better performance has been confirmed.・ In highly data compressed image transmission, variable lenght coding is frequently used. It is, therefore, likely to lose frame synchronization and bursty errors occur. We have proposed to combine error resiliant entropy coding (EREC) and unequal error protection coding, and confirmed its superior performance.・ In moving image transmission, interframe predictive coding is often used. Errors tend to propagate through the succeeding frames. Thus, to prevent error propagation, an error control scheme based on ARQ which takes the advantage of the assumed source coding into account has been proposed, and its superior performance has been confirmed.

为了在移动的无线信道上实现高速率、高可靠性的多媒体通信，研究了基本的关键技术。主要研究成果总结如下。·研究了干扰消除器，它既能消除同频干扰，又能克服多径传播引起的严重码间干扰。特别地，网格编码干扰消除器（TCC）和简单而有效的单用户型干扰消除器已分别被提出并详细研究用于TDMA和CDMA。本文提出了一种适用于话音和数据综合业务的动态信道分配算法。其上级性能已在单时隙语音和三时隙数据流量的假设下得到验证。·在TDMA/TDD系统中，研究了一种适用于上下行业务不均衡的非对称信道的动态信道分配算法。通过在上行链路和下行链路之间为流量较大的一侧分配更多的信道，可以获得更好的性能。·在高数据量压缩的图象传输中，常采用变长编码。因此，很可能丢失帧同步并且发生突发错误。我们提出了将纠错熵编码（EREC）和不等差错保护编码相结合，并证实了其上级的性能。·在运动图像传输中，经常使用帧间预测编码。错误倾向于通过后续帧传播。因此，为了防止错误传播，已经提出了一种基于ARQ的错误控制方案，该方案考虑了假定的信源编码的优点，并且已经证实了其上级性能。

项目成果

Lan Chen: "A Dynamic Channel Assignment Algorithm for Voice and Data Integrated TDMA Mobile Radio" Proc.7th IEEE PIMRC Conference. 213-217 (1996)

Lan Chen：“语音和数据集成 TDMA 移动无线电的动态信道分配算法”Proc.7th IEEE PIMRC 会议。

Y.Koyama, S.Yoshida: "Error control for still image transmission over a fading channel" Proc.of IEEE VTC' 95. 609-613 (1995)

Y.Koyama、S.Yoshida：“衰落通道上静态图像传输的错误控制”Proc.of IEEE VTC 95. 609-613 (1995)

Susumu Yoshida: "Advanced reception techniques for a multipath fading channel-Sector-antenna MLSE reception and trellis-coded co-channel interference canceller-" 2nd International Workshop on Mobile Multi-media Communications(MoMuC'95). (1995)

Susumu Yoshida：“多径衰落信道的先进接收技术-扇区天线MLSE接收和网格编码同信道干扰消除器-”第二届国际移动多媒体通信研讨会(MoMuC95)。

L. Chen: "A dynamic channel assignment algorithm for voice and data integrated TDMA mobile radio" Proc. of 7th IEEE PIMRC '96. 213-217 (1996)

L. Chen：“语音和数据集成 TDMA 移动无线电的动态信道分配算法”Proc。

K. Takinami: "Simple adaptive interference cenceler suitable for DS-CDMA mobile radio" to be presented at IEEE Vehicular Technology Conferenece '97. (1997)

K. Takinami：“适用于 DS-CDMA 移动无线电的简单自适应干扰消除器”将在 IEEE 车辆技术会议 97 上发表。