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

• Main Authors: Chi-Wen Luo, 羅啟文
• Other Authors: Jen-Jee Chen
• Format: Others
• Language: en_US
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/47589910735269682055

碩士 === 國立臺南大學 === 電機工程學系碩博士班 === 102 === 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, on the premise of being compatible to the LTE-A resource allocation specification, we discuss how to allocate the uplink resource, mobile device uplink path, and uplink transmit power in an energy saving way over LTE-A relay networks, such that the battery life of the mobile device can be extended. The objective is to minimize the total energy consumption of UEs while guarantee the constraints of system radio resource, maximum transmission power, and each of their quality of service (QoS). We also prove that this uplink resource and power allocation problem to be NP-complete. Considering the very short scheduling period in LTE-A (the subframe length in LTE-A is only 1ms), we propose an efficient method to solve the uplink resource and power allocation problem. The complexity analysis shows that the time complexity of the proposed heuristics is O(n2). Simulation results show that our proposed algorithm can effectively reduce the energy consumption of UEs and guarantee users’ service quality.