第四代長期演化通訊技術之研究調查及其移植到超第四代與第五代通訊技術的挑戰

Abstract

It is apparent that in about every 10 years a new mobile generation appears. Current trends in mobile technology are centered around the 4G LTE and a possible migration towards 5G networks otherwise known as Tactile Internet. 5G is now the next major phase of wireless communication standards beyond the current 4G/IMT-Advanced standards even though 5G specifications are yet to be described in any published official document by the telecommunication standardization body. This thesis work is designed to carry out a comprehensive survey into 4G/LTE Technologies and to introduce fundamental information on the current trends. In order to highlight some of the technical capabilities, a detailed reference is made to testing and measurements carried out in the NCTU Broadband Mobile Lab (BML) which consist of a four stage test bed. To evaluate QoS of Video streaming for real time applications I have carried out a hands on testing and measurement on video streaming using 4G LTE systems with emphasis on Packet loss and Jitter. I have also given an overview on associated challenges with emphasis on core technologies for the current generation and those that require attention in future migrations to the next Generation Technologies - beyond 4G/5G. Finally at the end of this survey, I was able to assess the cellular operators in my country with a view to be able to make reasonable suggestion in the event of choosing a vendor with particular focus on the nature of Vietnamese telecoms market and current deployments by the operators.

依目前的趨勢來看，大約每10年就有新一代的行動通訊系統出現。而現今行動通訊技術集中於4G/LTE，並朝5G網路邁進。儘管5G規格尚未由電信標準化團體在任何公開的官方文件中描述，5G技術已超越了當前的4G/IMT-Advanced的標準，是下一個世代無線通訊技術的主要的標準。本論文旨在為4G/ LTE技術進行全面的調查，並介紹目前無線通訊技術之趨勢。除相關之技術介紹外，本論文還詳述交大寬頻移動實驗室（BML）四階段測試平台所開發之量測技術；為評估即時應用視訊流量的服務品質，亦進行了視訊流量在4G/LTE系統的量測，並針對封包遺失與擾動進行量測。本論文亦提出了現階段無線通訊技術的相關挑戰，以及將來轉移到下一代需要特別注意的技術。最後，總結本論文之研究，將用以評估越南的電信運營商，以期在越南電信市場上，以及目前部署的運營商，能夠作出合理的建議，以選擇適合的供應商。