This paper proposes a s.c. 2 ms range extension scheme for High Speed Uplink Packet Access (HSUPA) networks to avoid potential coverage problems and usage of multiple TTI lengths. With range extension UEs in poor radio conditions are configured to send bundles of 2 ms TTI transmissions without HARQ feedback to improve their coverage. This paper analyzes the performance of range extension in comparison with normal 2 ms TTI performance with multiple inter-site distances. The analysis is conducted considering VoIP performance due to its high sensitivity to additional delays and packet loss. The results acquired by using system level simulation tool indicate that using 2 ms range extension can improve system capacity in larger cells where normal 2 ms TTI can result into coverage problems. Moreover, utilizing repeated 2 ms TTIs instead 10 ms TTIs enables increased battery saving opportunities when UL DTX is applied.
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机译:本文提出了一个2 ms范围扩展方案,用于高速上行链路分组接入(HSUPA)网络,以避免潜在的覆盖问题和多个TTI长度的使用。使用范围扩展,处于不良无线电状况的UE被配置为发送2 ms TTI传输的捆绑包,而无需HARQ反馈以改善其覆盖范围。与多个站点间距离的正常2 ms TTI性能相比,本文分析了范围扩展的性能。进行分析时要考虑VoIP性能,因为它对额外的延迟和数据包丢失高度敏感。使用系统级仿真工具获得的结果表明,使用2 ms的范围扩展可以提高较大小区的系统容量,而正常的2 ms TTI可能会导致覆盖问题。此外,当应用UL DTX时,利用重复的2 ms TTI而不是10 ms TTI可以增加电池节省的机会。
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