LTE-ADVANCED: NEXT-GENERATION WIRELESS BROADBAND TECHNOLOGY
LTE-ADVANCED: NEXT-GENERATION WIRELESS BROADBAND TECHNOLOGY
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DOI：
10.1109/mwc.2010.5490974
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发表时间：
2010-06-01
影响因子：
12.9
通讯作者：
Thomas, Tim
中科院分区：
文献类型：
--
作者：
Ghosh, Amitava;Ratasuk, Rapeepat;Thomas, Tim
LTE版本8是基于OFDM的主要宽带技术之一，其目前正在商业化。主要部署在宏/微小区布局中的LTE版本8提供改进的系统容量和覆盖、高峰数据速率、低延迟、降低的操作成本、多天线支持、灵活的带宽操作以及与现有系统的无缝集成。LTE-Advanced（也称为LTE Release 10）显著增强了现有的LTE Release 8，并支持更高的峰值速率、更高的吞吐量和覆盖范围以及更低的延迟，从而带来更好的用户体验。另外，LTE版本10将支持异构部署，其中包括微微小区、毫微微小区、中继器、远程无线电头端等的低功率节点被放置在宏小区布局中。LTE-Advanced功能使人们能够满足或超过IMT-Advanced要求。还可以注意到，LTE版本9相对于空中接口向LTE版本8提供了一些微小的增强，并且包括诸如双层波束成形和基于到达时间差的定位技术的特征。在本文中，讨论了LTE版本10（又名LTE-Advanced）所考虑的技术概述。这包括经由载波聚合的带宽扩展以支持高达100 MHz的部署带宽、包括单小区多用户多输入多输出传输和协作多点传输的下行链路空间复用、包括扩展到四层MIMO的上行链路空间复用、以及强调类型1和类型2中继的异构网络。最后，使用IMT-A场景的LTE-Advanced的性能，并与全缓冲区和突发业务模型的IMT-A目标进行比较。
LTE Release 8 is one of the primary broadband technologies based on OFDM, which is currently being commercialized. LTE Release 8, which is mainly deployed in a macro/microcell layout, provides improved system capacity and coverage, high peak data rates, low latency, reduced operating costs, multi-antenna support, flexible bandwidth operation and seamless integration with existing systems. LTE-Advanced (also known as LTE Release 10) significantly enhances the existing LTE Release 8 and supports much higher peak rates, higher throughput and coverage, and lower latencies, resulting in a better user experience. Additionally, LTE Release 10 will support heterogeneous deployments where low-power nodes comprising picocells, femtocells, relays, remote radio heads, and so on are placed in a macrocell layout. The LTE-Advanced features enable one to meet or exceed IMT-Advanced requirements. It may also be noted that LTE Release 9 provides some minor enhancement to LTE Release 8 with respect to the air interface, and includes features like dual-layer beamforming and time-difference-of-arrival-based location techniques. In this article an overview of the techniques being considered for LTE Release 10 (aka LTE-Advanced) is discussed. This includes bandwidth extension via carrier aggregation to support deployment bandwidths up to 100 MHz, downlink spatial multiplexing including single-cell multi-user multiple-input multiple-output transmission and coordinated multi point transmission, uplink spatial multiplexing including extension to four-layer MIMO, and heterogeneous networks with emphasis on Type 1 and Type 2 relays. Finally, the performance of LTE-Advanced using IMT-A scenarios is presented and compared against IMT-A targets for full buffer and bursty traffic model.