Dissertation > Excellent graduate degree dissertation topics show

Implementation of Link Adaptive Technology on MAC Layer in LTE System

Author: ChenGengYu
Tutor: YuJianGuo
School: WRI
Course: Communication and Information System
Keywords: Link adaptive LTE (Long Term Evolution) HARQ (Hybrid AutomaticRepeat reQuest) AMC (Adaptive Modulation and Coding)
CLC: TN929.5
Type: Master's thesis
Year: 2012
Downloads: 4
Quote: 0
Read: Download Dissertation

Abstract


It is the need of market development and social economy to provide userscommunications services with higher rates, greater bandwidth. The wideband wirelessaccess technologies and mobile communications industry are continually becomingintegrated and developed, the result is mobile communications industry becomes widelyand widedband wireless access technologies becomes mobile. In response to these needs,3GPP officially launched the Long Term Evolution (LTE) of mobile communicationtechnologies project in March2005. As the changes in wireless channel character, how tomaximize the data transfer rates in limited bandwidth, how to make effective use of thechannel changes, and how to maximize the frequency efficiency, become the key point ofmobile communication research. Link adaptive technique has been considered as the keytechnologies of LTE because of its strong advantage in improving the frequency efficiencyand data transfer rates.This paper studied the link adaptive technique in TD-LTE system and itsimplementations in MAC layer. The specific work as follows:1. Firstly, the origin, development and system architecture of LTE was introduced, anddiscussed its protocol, after that link adaptive technology as the main research of this paperwas analyzed. In order to propose a new algorithm and improve the current technology, theactualities of Hybrid Automatic Repeat request (HARQ) and Adaptive Modulation andCoding (AMC) research was expatiated.2. The basic principle and TD-LTE protocol of HARQ was researched, then especiallyanalyzed the design of uplink and downlink HARQ to introduce the scheme of HARQ inTD-LTE system, and analyzed its feasibility and superiority.3. The basic principle and TD-LTE protocol of AMC was researched. And in order toachieve the adaption of modulation and coding, the Dynamic Offset AMC algorithm wasproposed. Then a scheme of AMC was designed, which can interact with the HARQ and dynamic choose the right MCS for LTE system.4. Finally, simulated the scheme and algorithm proposed in this paper, the resultshows that Dynamic Offset AMC can improve the transmission efficiency and reduce theblock error rate. Then a real experimental environment was build, the practical applicationin LTE BBU tell us that the scheme and algorithm proposed in this paper are very useful inprojects, and the system downlink transmission rate can achieve a stable68Mb/s.

Related Dissertations

  1. Comparison Peak-to-Average Power Ratio of Single Carrier FDMA and OFDMA,TN929.531
  2. LTE/FDD Downlink System Level and Link Level Interface Study,TN929.533
  3. Study of the Link Adaptive Transmission and Multi-Antenna Technology in IEEE 802.16m System,TN929.5
  4. The Implementation and Research on LTE Decoding Uplink,TN929.5
  5. Study on the Key Technology of Ransmission Link Adaptive Based on Cognitive Radio,TN92
  6. Research and Implemrntation of Adaptive Link in Mobile Communication Systems,TN929.5
  7. Research on Key Technologies and Applications of Adapative Transmission,TN929.5
  8. Antenna Selection in Future Wireless Communication Systems,TN828
  9. Research on Key Technologies of Physical Downlink Shared Channel in LTE System,TN929.5
  10. Research and Realization on Wireless Packet Scheduling Algorithm and Resource Allocation Strategy in TD-LTE Downlink System,TN929.5
  11. Research and Implementation on TD-LTE System Downlink Link Adaptation,TN929.5
  12. Research and Design of SI Handover Technology in LTE System,TN929.5
  13. Research on PTN Carrying Network Construction Solution to LTE Networks,TN929.5
  14. Design and Implement of Multi-Port Network Communication Platform,TN929.5
  15. The Technology Research on Channel Coding and Channel Estimation in MC-CDMA Systems,TN929.533
  16. Power Aware Routing Protocal Based on OLSR in Ad Hoc Network,TN929.5
  17. Research and Design of High Layer Protocol in DMR Trunking System,TN929.52
  18. Large the Hongshan iron ore mine personnel tracking positioning system optimization study,TN929.5
  19. The Design and Research of Health Management Based on Smartphone Environment,TN929.53
  20. The Effects of Transmission Network Faults on the WCDMA Mobile Network,TN929.533
  21. The Internet of Things Applied Research in Clothing Industry,TN929.5

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
© 2012 www.DissertationTopic.Net  Mobile