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    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/119800

    Title: 利用間歇連線P2P訊息擴散機制的WaterChat APP設計
    A WaterChat APP Based on intermittent-connected P2P Message flooding Mechanism
    Authors: 羅尉晉
    Contributors: 蔡子傑
    Tsai, Tzu-Chieh
    Keywords: 間歇連結移動網路
    Intermittently connected networks
    Opportunistic mobile network
    Date: 2018
    Issue Date: 2018-08-29 16:04:18 (UTC+8)
    Abstract: 近年來隨著行動裝置及行動網路的普及,使得社群網路及各種社交聊天應用已融入使用者生活之中,但在許多場合如集會遊行、陳情抗議、大型室內外活動,因人潮聚集,使得行動無線網路訊號壅塞,致訊息無法正常傳遞。而隨著WiFi Direct及Bluetooth 4.0等無線技術的普及,行動裝置間的連線有了更多的選擇。
    With the popularization of mobile devices and mobile networks, social networks and various social chat applications have played an important role in users’ daily life. However, in several large-scale events like protests or indoor/outdoor activities with large amount of people, due to mobile wireless network signal congestion, messages cannot be transmitted normally. Nowadays, new wireless technologies such as Wi-Fi Direct and Bluetooth 4.0 has provided more connection choices between mobile devices.
    First, we redesigned a system architecture based on the concept of WaterChat which is flexible and suitable for four different chat scenarios. Users can choose one of two invitation modes depending on their privacy requirements. Secondly, to solve flooding in opportunistic mobile network, we present threshold and connection control to improve the efficiency in our system. We also present an off-site synchronization, so the message transmission scope is no longer limited to the physical geographical restrictions. In the end, we will some discuss security issue and how to encrypt messages in four chat scenarios.
    To sum up, we design and implement a novel and full-featured WaterChat App based on intermittent-connected P2P Message flooding Mechanism.
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    Description: 碩士
    Source URI: http://thesis.lib.nccu.edu.tw/record/#G0102971005
    Data Type: thesis
    DOI: 10.6814/THE.NCCU.EMCS.006.2018.B02
    Appears in Collections:[資訊科學系碩士在職專班] 學位論文

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