網際網路協定(IP)在下一代網路(NGN)中是最重要的通訊協定，3GPP組織選定基於IP的會談初始協定(SIP)做為網際網路多媒體子系統(IMS)的主要信令通訊協定，不同於傳統線路交換(Circuit Switched)網路，在網際網路多媒體子系統中，整體核心網路與底層承載的媒體流量及溝通信令都是透過分封交換(Packet Switched)的網路機制進行資料傳遞。分封交換網路中可能有封包碰撞的情況發生和網路底層屬於盡力服務(Best effort)傳輸的特性，導致在媒體流量或背景流量較高的情況下會衝擊核心網路信令傳遞校率。
　　此外，近期有許多基於無線感測網路技術的緊急服務被提出，此類服務或網路可能受到地理位置侷限而影響服務和通訊。為克服上述核心網路信令校率被衝擊與服務受到侷限的議題，本研究提出以應用層為基礎架構的服務協力方法，延伸緊急服務的範圍與提升服務可用性，並且提出在協力緊急之網際網路多媒體子系統中使用的進階路徑遷移機制，用以增加傳遞重要信令流量的效率，藉此降低媒體流量或背景流量較高時，對核心網路信令流量造成的效率衝擊，確保重要服務的信令仍可以透過本研究提出的協力緊急網際網路多媒體子系統平台持續正確傳遞。
　　具體而言，本研究加強了基於網際網路多媒體子系統與全IP網路的基礎架構的應用與服務品質，並且透過提出的協力緊急網際網路多媒體子系統平台，提供無所不在的緊急服務，同時研究異質網路和IP多媒體子系統的議題，透過本研究提出的路徑遷移機制能提高核心網路中的信令校率、系統容量以及維持通話品質。
　　接著，近幾年物聯網應用大量興起，在下一代網路中佈署大量結合各式各樣應用的無線感測元件，將這些元件紀錄的資訊無縫整合到網際網路是全球資通訊產業發展重要的關鍵，因物聯網廣範的使用，進一步再發展到無線身體區域網路(WBANs)與穿戴科技的應用，承續網際網路多媒體子系統整合物聯網與無線身體區域網路到緊急服務的情境，本研究提出整合框架，透過使用網際網路多媒體子系統的服務進行分析，用來支援無線身體區域網路、狀態服務與緊急服務的運作，本研究相關成果均可做為未來網際網路、物聯網和網際網路營運商導入評估之依據。

Since Internet Protocol (IP) is the most important protocol in Next Generation Networks (NGNs), the 3rd Generation Partnership Project (3GPP) utilizes Session Initiation Protocol (SIP) based on IP as the base and major protocol for negotiating sessions in IP Multimedia Subsystem (IMS). Unlike traditional circuit-switched network, in IMS, the media traffic flow and signaling are both delivered through IP transport, which is known as packet-switched network. The media traffic affects the signaling efficiency in the core network, due to traffic/packet collisions and the best effort packet delivery mechanism in ehternet.
In addition, various emergency services based on wireless sensor network technologies have recently been proposed. However, the success of these services/networks is inherently limited by geographical restrictions, and their need to be deployed in advance. In order to overcome these problems, this thesis proposes an application level approach to enhance the service coverage and availability of emergency services, and a novel path-migration mechanism for enhancing the traffic efficiency in integrated Cooperative Emergency IMS (CE-IMS).
Specifically, this thesis augments these services with All-IP network infrastructure based on an IP Multimedia Subsystem. Furthermore, the integration of IMS Emergency Services architecture with Cooperative Network technology is proposed to provide ubiquitous emergency services. The primary problems of cooperation between heterogeneous networks and IMSs are also investigated. The discussion and the experimental results of performance of the proposed CE-IMS are all examined. The simulation results also show that interference and traffic collisions can be reduced by applying the proposed path-migration mechanism, and the signaling efficiency in the core network can be improved with higher system capability and the voice quality is also guaranteed when making emergency calls.
Moreover, the application of the Internet of Things (IoT) has become an emerging business in recent years. The most important concept of next-generation networks for providing a common global IT platform is combining seamless networks and networked things, objects or sensors. Thus, wireless body area networks (WBANs) are becoming mature with the widespread usage of the IoT. In order to support WBANs, the well-designed platform, scenario and emergency service flow for IoT with WBANs are necessary elements due to the sensors in a WBAN being related to wearer's life. The sensors on the body could detect bioinformatic information and medical signals, such as heartbeat and blood pressure. Thus, the integration of the IoT and network communication in daily life is important. However, there is not only a lack of common fabric for integrating the IoT with the Internet, there is also no emergency call process in the current network communication environment. In order to address such problems, the prototype integration of the IoT and an emergency call process is discussed. Then, a bootstrap platform is proposed to provide the discussion of open challenges and solutions for deploying the IoT in the Internet, and the emergency communication system is analyzed using a 3GPP IP multimedia subsystem service. Finally, the prototype for supporting a WBAN with an emergency service is also addressed, and the performance results are useful to service providers and network operators, helping them estimate their migration to the IoT by referring to this experiment.

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