Design a Cross-layer Uplink Green Resource and Power Allocation Method over LTE-A Relay Network

在LTE-A的架構中，中繼式節點被提出來可以增強基地台的覆蓋率、節省行動裝置的耗電量、提供高速的資料傳輸並解決通訊空洞問題。然而，對使用者來說，LTE-A使用高的傳輸資料速率將產生更多的能源損耗，尤其行動裝置是由電池供電的，續航力對裝置而言非常重要。在本文中，我們考慮如何在LTE-A中繼式網路架構中妥善分配上行資源和安排手機傳輸功率。我們的目標是在保證服務品質的情形下，使得所有的使用者裝置（User Equipments，UEs）所消耗的總能量最少。我們證明這是一個NP-complete問題，所以我們提出一個有效率的方法來解決這個問題。模擬結果顯示我們的方法能有效減少使用者裝置的電量消耗並保證他們的服務品質。

The Relay Node (RN) in Long-Term Evolution-Advanced (LTE-A) networks is used to enhance the coverage of high data rate and solve the coverage hole problem. However, for User Equipments (UEs), using a higher transmission rate means more energy consumption; especially they are operated by batteries. In this paper, we consider an uplink resource and power allocation problem for energy conservation in LTE-A relay networks. The objective is to minimize the total energy consumption of UEs while guarantee their quality of services (QoSs). We prove that this uplink resource and power allocation problem to be NP-complete and we develop a method to solve the problem. Simulation results show that our algorithm can effectively reduce the energy consumption and guarant ee users' service quality.