3G作业.docVIP

西安邮电大学 通信与信息工程学院 第三代移动通信技术与业务 课程报告 专业班级： 通工1107班 学生姓名： 梁斓 学号(班内序号):27） 原文： A Survey of Radio Resource Management for Spectrum Aggregation in LTE-Advanced Abstract—In order to satisfy the requirements of future IMT-Advanced mobile systems, the concept of spectrum aggregation is introduced by 3GPP in its new LTE-Advanced (LTE Rel. 10) standards. While spectrum aggregation allows aggregation of carrier components (CCs) dispersed within and across different bands (intra/inter-band) as well as combination of CCs having different bandwidths, spectrum aggregation is expected to provide a powerful boost to the user throughput in LTE-Advanced (LTE-A). However, introduction of spectrum aggregation or carrier aggregation (CA) as referred to in LTE Rel. 10, has required some changes from the baseline LTE Rel. 8 although each CC in LTE-A remains backward compatible with LTE Rel. 8. This article provides a review of spectrum aggregation techniques, followed by requirements on radio resource management (RRM) functionality in support of CA. On-going research on the different RRM aspects and algorithms to support CA in LTE-Advanced are surveyed. Technical challenges for future research on aggregation in LTE-Advanced systems are also outlined. Index Terms—Carrier aggregation, Spectrum Aggregation,Radio Resource Management, scheduling. I. INTRODUCTION IN ORDER to meet the growing demand for high-speed and diverse wireless broadband services, the IMT-Advanced (IMT-A) requirements have established a minimum support or 1 Gbps and 500 Mbps peak rates for downlink (DL) and uplink (UL), respectively . In order to fulfil these challenging requirements, one key feature is the support for wider bandwidths (40 MHz mandatory, and up to a maximum of 100 MHz being optional) .IMT Bands, i.e. the candidate frequency bands for IMTAdvanced,identified at World