User's Manual

CPE User Manual

第 26 页

- 确保设备的天线对准了宏基站

- make sure the antenna is aligned with the Cell

- 确认设备到宏基站之间尽量是无阻挡，特别是没有金属遮挡，必要的时候需要调

整设备位置，确保设备满足的 RSRP 满足要求。

- confirm there is no barrier between the device and Cell, especially no metal barrier. To

ensure the device meet the RSRP requirements , adjusting the location is necessary

sometimes .

- 确认设备到宏基站之间的距离是合理的，以手机用户为例，如果在该位置处放置

手机，手机能够正常上网以及通话正常。

- confirm a reasonable distance between the device and Cell, you can simply determine

by a commercial mobile phone, if mobile phone works well at that place , it means the

distance should be reasonable.

RSSI - 建议值是 -75dBm 到 -55dBm ，反映的是当前环境下该频点上的总信号强

度。。

RSSI - the recommended value is -75dBm to -55dBm .

在我们的实践过程中，RSRP 和 RSSI 这两个指标往往是需要结合起来分析的，有

一种比较简单的做法是，我们可以引入误码率进行二次分析，正常情况下上行或下行的

误码率不应该长期占据在协议规定的极限位置 10%，从实验室的调测数据来看，通过

调整设备角度，设备和基站距离，基站发射强度等是可以有效控制误码率的，建议误码

率需要能够降低到 5%以内，误码率的查看可以参考 5.2.2 小节 CPE 误码率分析。

Most of time ,RSRP and RSSI are often taken into analysis together , but it seems not a

easy work, there is a simple way we can follow, analyze the BLER . UL BLER or DL BLER

should not be occupied for a long time in the degree of the maximum value - 10%, our

experiences show that antenna angle, distance , TX power of cell can take effect to the

BLER . The recommended value of BLER less than 5%. You can refer to chapter 5.2.2 to

analyze BLER..

5.2.2 CPE 误码率分析

CPE BLER

在 fig 5-1 标记为 4 和 5 的红色小框中，可以对误码率进行统计，“[SCC]”字样表

示辅载波频点信息，其中 BLER 指示下行误码率，HI 指示上行误码率。BLER 和 HI 格

式如下：

Label “4” and “5” in the red area in fig 3-1, you can get BLER information, "[SCC]"

meas secondary carrier, BLER shows download BLER, HI shows upload BLER. The BLER

and HI formats are as follows:

BLER (P1 / P2, P3 / P4) HI (P5 / P6)

P1: CW0 信道上的坏块数

P1: the number of bad blocks on the CW0 channel