長期演進技術網路無線資源控制狀態轉換之非連續接收節能機制效能分析

Abstract

3GPP LTE 提供了使用者較高的頻寬，但也造成User Equipment(UE)更高的能量耗損，為了解決UE能量耗損的問題，3GPP LTE制定了Discontinuous Reception(DRX)節能機制用來讓UE在不需要做資料傳輸時，能夠關閉UE的RF模組來增加UE的使用週期以達到節能效益。在本篇論文中，我們同時考量了DRX節能機制與Radio Resource Control (RRC)狀態轉換，並提出一種簡化但精確的數學模型，用來針對UE的能量耗損與傳輸延遲做出效能分析。為了適當的呈現能量耗損在不同RRC狀態的差異，我們提出了Real Power Consumption用來作為效能評鑑的依據。

The 3GPP long term evolution(LTE) not only offer high bandwidth for data transfer but also exhaust the User Equipment(UE)’s battery life quickly. In order to save the UE’s battery Life, discontinuous reception(DRX) is specified to reduce the UE’s power consumption, DRX allow the UE to turn off RF module when there is no data need to transfer. This work focus on analysis DRX mechanism with different RRC states, we use a simple numerically analytical to model this. We divided the time period for power-saving operation into several independent parts to derive the power consumption and the transmission delay. To analysis the power advisably, we introduce the real power consumption through the power model. We evaluate the performance that the UE is more power effectively when enters RRC IDLE in lower arrival rate, and there is trade-off between the power and the transmission delay.