本研究目的為：使用歐洲電信學院EUROCOM所開發的一個根據C語言之開放原始碼OpenAirInterface (OAI)，致力實現電信基地台軟體化。我們將其中實體層PHY層之程式語言執行流程重新改寫、編排並配合使用C語言中Pthreads的函式及功能實現PHY層之平行化處理以增進基地台效能。此種設計方法可以改進原始OAI程式序列式執行程式之效率。用多執行緒處理PHY層中下行資料傳送的流程，以減少C語言for迴圈中的負擔以及時間。所使用的PHY層下行程序中的子函式，仍保留了原始程式碼的優點，包括其架構的健全與穩固，不易發生資料填寫的錯亂以及記憶體使用之間的碰撞。與原始OAI相比，PHY層下行程序的多執行緒化可以較快速地使複數UE連線的狀態下完成資料傳輸。實測結果充分說明了此架構的OAI程式效能上的優越性。

The objective of this research is to realize the softwarization of the base station of telecommunication using OpenAirInterface (OAI) source code based on the C language developed by EUROCOM. We rewrite and rearrange the execution procedures of the program in the physical layer (PHY), and apply the functions of Pthreads in C language to implement the parallel processing of PHY so as to improve the performance of the soft-defined base station. Such designed architecture can improve the efficiency of original OAI sequent processing. The procedures of PHY downlink data transmitting are processed in multiple threads to reduce the loading and execution time of for loop processing of C. The sub-functions used in this thesis still retain advantages of original codes, including the completeness and stability of the scheme, and the clearness of data filling to prevent from the confliction in the comprehensive dispatching of the use of memory resource. In comparison with the original OAI, the multi-thread PHY downlink could finish the data transmission more quickly under the connection of multiple UEs. The physical test results show the excellent performance of the OAI software based on the proposed architecture.

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