爱立信Locating算法及参数调整优化分析

Ericsson Locating Algorithm and Analysis on Parameter Adjustment and Optimization

随着基站密度的越来越高,信号重叠覆盖越来越严重,特别是在高层建筑物之间及室内,由于无线电波折射及反射原因,无线信号杂乱,而且信号波动不稳定,切换序列难以预测。移动台在如此复杂的无线环境当中,很容易引起切换混乱,造成切换掉话。分析掉话的原因可知,引起掉话的很大一部分原因是上行原因掉话及突然掉话。所以有效控制复杂无线环境中的切换,将能大大改善通话的突然掉话。Locating算法专题优化分析,通过原理和试验来说明:如何通过启用及控制上行Locating排队来筛选切换候选小区,筛除下行链路信号较强而上行链路信号较弱的切换候选小区,避免通话切入上下行功率不平衡小区而引起上行信号原因掉话或突然掉话。

With the increasing density of base stations, signal overlapping coverage is more and more serious, especially among high-rise buildings and interior. Due to refraction and reflection of radio waves, it causes the wireless signal clutter and the unstable signal fluctuation. Switching sequence is difficult to predict. Mobile station can easily lead to confusion switch in such a complex wireless environment, resulting in calls dropping. By analysis of the reasons for call dropping, we can get that sudden call droppings and take the most part of reason. Therefore, effective control of a complex wireless environment in the switch, we will be able to greatly improve the call sudden call droppings. By theory and experiment, this paper illustrates how to enable and control uplink Locating line to filter the switch candidate cell, and sifting the switching candidate cell which is stronger in downlink but weaker in uplink to avoid the uplink signal and sudden dropping calls caused by power imbalance between uplink and downlink.