通過混和式Wi-Fi Direct/Bluetooth網路的P2P媒體串流的設計與實現

Abstract

近年來行動裝置的普及讓人們可以利用網際網路互相的聯繫以及享受各種既有的通訊軟體的服務如Skype、Line、WeChat等等，但這些服務的共通點都必須使用到網際網路以及伺服器的支援。如果你位於沒有網際網路的地區，就無法使用各種多媒體服務。 Wi-Fi聯盟於2010年發表Wi-Fi Direct技術，讓裝置間可直接連線而不需要經過任何無線基礎網路的支援並繼承了Wi-Fi既有的優點如高頻寬、安全性、以及普及性，而藍芽為另一項無線技術並且也適合用於短距離間的多媒體傳輸。 在本論文中，我們設計了一個混合Wi-Fi Direct與藍芽網路的P2P媒體串流的應用程式，提供及時語音串流以及文字訊息傳輸的服務並且不需要任何網際網路的支援，利用Wi-Fi Direct與藍芽的互相支援，可以將實體的傳輸距離拉的更大。接著本論文對於各種不同的狀況來測試語音傳輸的延遲時間與封包掉落率，並評估在各種情況下語音訊息的可行性。

In recent years, the popularity of mobile devices allows people to use the Internet to connect with each other and enjoy a variety of existing communications software services such as Skype, Line, WeChat, etc., but these services must connect to the internet and get support by server. You cannot use a variety of multimedia services if you locate in an area without internet support. The Wi-Fi Alliance announced Wi-Fi Direct technology in 2010, enabling direct connectivity between devices without the need for any wireless infrastructure support and inheriting the benefits of Wi-Fi such as high bandwidth, security, and popularity. While Bluetooth is another wireless technology and suitable for multimedia transmission over short distances. In this thesis, we propose a mixed Wi-Fi Direct/Bluetooth network P2P media streaming application that provides audio streaming and text messaging services and does not require any Internet support. The use of Wi-Fi Direct and Bluetooth support each other, the real transmission distance can be extended. In this thesis, the delay and packet loss rate of voice transmission are tested for different situations, and the feasibility of voice messages in various situations is evaluated