A Relay-Node and CoMP-Based Scheduling for LTE-A

• Main Authors: Pai-Mou Yang, 楊佰謀
• Other Authors: Wei-Kuang Lai
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/4qjhck

碩士 === 國立中山大學 === 資訊工程學系研究所 === 103 === Nowadays, with the rapid growth of handheld devices, people rely on wireless network more than anytime before. Since wireless network are more and more important, 3GPP proposed a new 4G wireless communication standard called “Long Term Evolution Advance” (LTE-A). In Release 9, 3GPP set a standard of “Relay” architecture to improve locations with bad connection, such as Hot Spot, Dead Spot, and Cell-edge. RN (Relay Node) can connect with DeNB (Donor eNodeB) by wireless Backhaul Link, therefore makes it a better choice for a large outdoor event held in a short duration compared to the wired Backhaul connection. CoMP (Coordinated multipoint transmission/reception) is a new architecture widely discussed and researched in LTE-A. CoMP can improve Cell-edge connection, and improve bitrate while decreasing interference. In this paper, we proposed a new scheduling mechanism combined of Relay and CoMP to improve the efficiency of wireless RN. The proposed scheduling can identify different UE (User Equipment) under a eNB (eNodeB). UE will report how many users served and the CSI (Channel State Information) to eNB. After gathering the information, our mechanism calculate a new weight. Then the weight and CSI exchange between eNBs, so RN can get more resources and allow RN combined with CoMP JT (Joint Transmission) mechanism to get higher priority. That is, four different priorities from high to low for JT RN, RN, JT UE, and UE are arranged. In the end of paper, we use a network simulator ns3 to simulate our method. Experiment results show the scheduling mechanism can improve the average throughput, and let the Relay Node has higher throughput by keeping benefit of CoMP.