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Wirelee Resource Scheduling Algorithm in TD-LTE System

Author: LiRen
Tutor: WangWenBo
School: Beijing University of Posts and Telecommunications
Course: Signal and Information Processing
Keywords: TD-LTE Radio resource Scheduling algorithm Performance Evaluation
CLC: TN929.5
Type: Master's thesis
Year: 2010
Downloads: 312
Quote: 2
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Abstract


At the end of 2004 , at the same time meet the needs of the new type of packet data services in order to respond to the challenges of the broadband wireless access technology , 3GPP launched its LTE (Long Term Evolution, LTE) technology standardization work . LTE supports both FDD (Frequency Division Duplex) and TDD (Time Division Duplex) duplex mode to achieve a smooth transition in order to be compatible with TD-SCDMA , China uses a TDD duplex mode , that is , the TD-LTE system . TD-LTE system as a resource block in time and frequency resource allocation method , the uplink and downlink time slots configured flexible , TDD-LTE system resource scheduling and traditional wireless communication systems are very different . In order to achieve a peak downlink rate of 100Mb / s, uplink peak rate of 50Mb / s , introduced in TD -LTE MIMO (Multiple-Input Multiple-Output) technology , the concept of resource pool to further expand the resource scheduling complex with the family , you need to join consider the time domain , frequency domain and airspace to consider . This paper briefly describes the characteristics of the TD-LTE system , summed up a common resource scheduling algorithm . Then build TD-LTE system level simulation platform , detailed description of its basic principles , modules and functions . Then, the TD-LTE downlink , for example , introduced the TD-LTE system single-antenna configuration CQI (Channel Quality Indicator) feedback model , MCS (Modulation Coding scheme) selection algorithm , analysis of different feedback strategies impact on system performance . Single antenna resource scheduling limitations for the existing protocols , there is one kind Common MCS selection algorithm - 3-stepsMCS selection algorithm . Simulation results show that the ,3-stepsMCS selection algorithm can effectively solve the agreement MCS selection restrictions the Best M feedback strategy can compromise uplink overhead and downlink throughput . Moreover , Best M Scheme II in the high - speed moving scenes provide better performance . Finally , the introduction of multi - antenna model of TD-LTE system performance analysis , resource scheduling algorithm for downlink multi-antenna configuration . Simulation results show that the multi-antenna technology can improve the frequency utilization efficiency ; macrocell and indoor scenes rank adaptive algorithm can ensure overall system performance in the case , to improve the throughput of edge users .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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