林風臺灣大學:資訊工程學研究所莊景翔Chuang, Ching-HsiangChing-HsiangChuang2010-05-182018-07-052010-05-182018-07-052008U0001-2706200816365800http://ntur.lib.ntu.edu.tw//handle/246246/1836823GPP proposes the Long-Term Evolution (LTE) technology for the next generation personal communication system. To reduce the transmission latency in the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, i.e., the radio network of LTE), the base station and radio network controller are merged into a single network node, eNB. In E-UTRAN, the Hybrid ARQ (HARQ) protocol in the MAC layer deals with transmission errors without the need to engage the ARQ protocol in RLC layer. Only in case of HARQ residual errors, ARQ protocol has to react. The HARQ-ARQ interaction has been introduced to resolve the HARQ residual errors. In this thesis, a simulation model is conducted to investigate the performance of the data transmission between UE and eNB with HARQ-ARQ interaction. We also develop an analytical model to validate the correctness of the simulation model.Contentscknowledgement . . . . . . . . . . . . . . . . . . . . . inglish Abstract . . . . . . . . . . . . . . . . . . . .iiiontents . . . . . . . . . . . . . . . . . . . . . . . . ivist of Figures . . . . . . . . . . . . . . . . . . . . viiist of Tables . . . . . . . . . . . . . . . . . . . . . ix Introduction . . . . . . . . . . . . . . . . . . . . . .1 HARQ-ARQ Interaction . . . . . . . . . . . . . . . . . .5 .1 System Arcitecture . . . .. . . . . . . . . . . . . . 5.2 HARQ Residual Error . . . . . . . . . . . . . . . . .10 Simulation Model . . . . . . . . . . . . . . . . . . . 13 Analytical Model . . . . . . . . . . . . . . . . . . . 27 Performance Evaluation . . . . . . . . . . . . . . . .35 Conclusions . . . . . . . . . . . . . . . . . . . . . 39ist of Figures.1 The protocol stacks for LTE-Uu and S1 in user plane case . . . . . . . . . . . 2.1 The block diagram for HARQ-ARQ Interaction . . . . . . . . . . . . . . . . . . . . 6.2 Multiple parallel SAW-HARQ processes . . . . . . . . . . . . . . . . . . . . . . . . 7.3 Relationship between status report and reordering buffer . . . . . . . . . . . . . 7.4 An example of the RLC timer operation . . . . . . . . . . . . . . . . . . . . . . . . 10.5 The HARQ residual error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 The window in List T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.2 The flowchart of simulation model (1/3) . . . . . . . . . . . . . . . . . . . . . . . 19.3 The flowchart of simulation model (2/3) . . . . . . . . . . . . . . . . . . . . . . . 20.4 The flowchart of simulation model (3/3) . . . . . . . . . . . . . . . . . . . . . . . 21.1 The timing diagram for the analytical model . . . . . . . . . . . . . . . . . . . . . 28.1 Effects of Treordering and Tpolling (p = 5%, " = 1%, RTT= 3 TTIs) . . . . . . 36.2 Effects of Tprohibit (p = 5%, " = 1%, RTT= 3 TTIs) . . . . . . . . . . . . . . . . . 38ist of Tables.1 Validation of the simulation and the analytical models . . . . . . . . . . . . . . 33application/pdf607435 bytesapplication/pdfen-US長期演進技術混合式自動回復請求自動回復請求Long Term EvolutionHybrid ARQARQthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/183682/1/ntu-97-R95922164-1.pdf