LTE FDD模式下VoIP TTI捆绑的原理与性能

Jing Han, Haiming Wang
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引用次数: 22

摘要

在覆盖有限的情况下,有限的传输功率和较短的TTI长度对LTE UL性能造成瓶颈。本文提出了一种有效的覆盖增强机制,称为TTI捆绑,以提高LTE FDD模式下的上行VoIP性能。通过半静态系统仿真,对TTI与VoIP业务捆绑的性能进行了评估,并研究了不同捆绑方式、不同数据包大小和数据包延迟预算对TTI与VoIP业务捆绑性能的影响。仿真分析表明,在适当的数据包大小下,TTI数据包可以有效地提高LTE FDD的覆盖性能。
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Principle and Performance of TTI Bundling For VoIP in LTE FDD Mode
Limited transmission power and short TTI length impose a bottleneck on LTE UL performance in a coverage-limited scenario. This paper presents an effective coverage enhancement mechanism called TTI bundling to boost uplink VoIP performance in LTE FDD mode. Performance evaluation for TTI bundling with VoIP traffic is carried out by semi-static system simulation, and the impact from different bundling options with different bundle size and packet delay budget is investigated. The simulation analysis proves that with proper bundle size, TTI bundling can enhance the coverage performance for LTE FDD effectively.
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