隨著無線行動通訊與製程技術的發展進步，智慧型手持裝置的功能也變得更加多元，使用者除了傳統的撥接電話、發送簡訊之外，網頁瀏覽、影音串流等網路相關應用更是不可缺少的功能。 手持裝置為了提供上述的服務就必須時常與基地台連線以進行資料交換，這會使裝置的功率消耗大幅提升；為了解決這個問題，LTE提出了非連續接收(Discontinuous Reception, DRX)機制，透過關閉射頻模組(RF module)來減少功率消耗；但隨著裝置上各種服務而產生的多重QoS連線需求，DRX機制正逐漸喪失應有的功能。 為了解決因多重QoS連線需求而產生的問題，本篇論文提出了P-W重新排程演算法，在原本的DRX技術上加入一套判斷機制，以封包的QoS需求及使用者的通道狀況(CQI)作為判斷的依據，讓基地台可以適當的調整DRC cycle的運用，並在演算法中加入權重比較機制，可依使用者的QoS需求計算出傳輸的先後順序，使基地台可以明確的進行使用者的資料傳輸排程。 由模擬結果可證實P-W重新排程演算法的確能提升DRX機制的效率，並且保證使用者的QoS需求均可獲得滿足。 ;With the advances in wireless mobile communications and process technology, Smart UE functionality becomes more and more important. In addition to traditional phone calls, sending text messages, Web browsing, video streaming and other Web-related applications become even more indispensable function. In order to provide these services, user equipment must always connect with the base station for data exchange, which makes the equipment power consumption dramatically. To solve this problem, the LTE proposes Discontinuous Reception mechanism, through the RF module off to reduce power consumption. However, because the requirement for multiple QoS connection on equipment arising from variety of services, leading DRX mechanisms lost their proper function. In order to solve the problems caused by the multiple QoS connection, this thesis proposes a P-W rescheduling algorithm. We add a mechanism to judge on the original DRX mechanism with QoS requirements and user′s channel condition (CQI) as a basis for judgment, so that the base station can appropriately adjusts DRC cycle usage. We also add a weighted comparison mechanism to the algorithm which is based on QoS requirements of users to calculate the transmission priority order, so that the base station can reliably perform user data transmission schedule. The simulation results confirm the P-W rescheduling algorithm which can really improve the efficiency of DRX mechanism, and ensure QoS requirements of users that can be met.
