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首页> 外文会议>IEEE International Conference on Communications >Contrasting Open-Loop and Closed-Loop Power Control Performance in UTRAN LTE Uplink by UE Trace Analysis
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Contrasting Open-Loop and Closed-Loop Power Control Performance in UTRAN LTE Uplink by UE Trace Analysis

机译：通过UE跟踪分析对比UTRAN LTE上行链路中的露天开环和闭环功率控制性能

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摘要

Uplink power control in UTRAN Long Term Evolution consists of an open-loop scheme handled by the User Equipment and closed-loop power corrections determined and signaled by the network In this study the difference in performance between pure open-loop and combined open and closed-loop power control has been analyzed and the different behavior of fractional vs. full path-loss compensation has been evaluated. A comprehensive system level simulation model has been used with a facility to trace a particular test user during its motion from eNodeB towards the cell border and back to its initial position. This study demonstrates the effect of distance path-loss of a test user on several physical layer performance metrics including throughput, resource allocation as well as modulation and coding scheme utilization. Simulation results in a fully loaded network show high throughput for open-loop fractional power control for the user located in the vicinity of the serving eNodeB, however, steep performance degradation has been observed when the user is moving towards the cell edge. The user throughput at the cell border can be increased by the closed-loop component. The benefit of closed-loop power control is the higher homogeneity in terms of throughput across the entire network area and the ability to automatically stabilize the network performance under different conditions like cell load and traffic distribution.
机译：UTRAN中的上行链路功率控制长期演进包括由用户设备处理的开环方案和由网络中的闭环功率校正，并通过网络中的闭环功率校正，研究纯开环和闭合和闭合和闭合之间的性能差异。已经分析了循环功率控制，并且已经评估了分数与完全路径损耗补偿的不同行为。全面的系统级仿真模型已经与设施一起使用，以在其从eNodeB朝向细胞边界的动作中跟踪特定测试用户并回到其初始位置。本研究展示了测试用户对几种物理层性能度量的距离路径损失的影响，包括吞吐量，资源分配以及调制和编码方案利用。仿真结果在完全加载的网络中显示出用于位于服务eodeB附近的用户的开环分数控制的高吞吐量，然而，当用户朝向小区边缘移动时，已经观察到陡峭的性能劣化。闭环组件可以增加单元格边界处的用户吞吐量。闭环功率控制的好处是整个网络区域的吞吐量较高的均匀性，并且能够在不同条件下自动稳定网络性能，如单元负载和流量分布。

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