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1、关注:网优资源库、免费领取网优资料控制信道IRC特性试点评估报告1 原理介绍控制信道IRC参数表示PUCCH自适应算法开关,用于控制小区是否使能PUCCH自适应功能。2 验证总结通过开启控制信道IRC功能,对系统上行每个PRB上检测到的干扰噪声均值提升0.5dBm,在高负载场景下,该功能在降低上行干扰的同时,接通率指标会有一定提升。3 商用结论该功能可降低系统上行干扰,改善上行质量,目前现网袁州区验证的三个网格指标均正常,可全网推广。4 应用场景该功能主要应用于存在一定的PUCCH干扰的场景,U2000侧选取现网高负载场景小区,用户较多时系统上行干扰低噪提升。优先针对存在高用户数、上行干扰较高
2、小区实施。5 开通方法具体配置参数:MOD CELLALGOSWITCH: LocalCellId=xxx, IrcSwitch=PucchIrcSwitch-1;6 验证评估6.1 低负载场景对比KPI指标对比:日期LTE Cell组 无线接通率RRC连接重建比率无线掉线率切换成功率(总)ESRVCC切换成功率系统上行每个PRB上检测到的干扰噪声的平均值2016-07-01IRC低负载99.81%0.66%0.10%99.46%84.96%-114.94082016-07-02IRC低负载99.79%0.70%0.10%99.51%98.95%-115.02872016-07-03IRC低负
3、载99.80%0.72%0.10%99.52%98.13%-115.08162016-07-04IRC低负载99.79%0.70%0.11%99.54%98.73%-114.50972016-07-05IRC低负载99.80%0.72%0.11%99.57%99.31%-114.77712016-07-06IRC低负载99.81%0.72%0.11%99.57%99.67%-115.1795开启前99.80%0.70%0.11%99.53%96.63%-114.919572016-07-07IRC低负载99.34%0.92%0.13%99.53%97.80%-115.03082016-07-0
4、8IRC低负载99.82%0.85%0.03%99.48%99.17%-115.39522016-07-09IRC低负载99.83%0.85%0.03%99.47%98.31%-115.41562016-07-10IRC低负载99.83%0.86%0.03%99.49%98.06%-115.50532016-07-11IRC低负载99.86%0.87%0.03%99.52%98.38%-115.55532016-07-12IRC低负载99.85%0.94%0.02%99.49%97.12%-115.5514开启后99.84%0.88%0.05%99.50%98.14%-115.4089指标提升
5、值0.04%0.18%-0.06%-0.03%1.51%-0.4894注:7月7号由于D频段帧偏置问题导致接通率指标恶化,剔除统计。VOLTE指标对比:日期LTE Cell组 无线接通率(QCI=1)(%)E-RAB建立成功率(QCI=1)(%)VoLTE上行丢包率(QCI=1)(%)VoLTE下行丢包率(QCI=1)(%)VOLTE下行平均时延2016-07-01IRC低负载99.83%99.96%0.05%0.05%3.21642016-07-02IRC低负载99.70%99.83%0.16%0.08%3.50652016-07-03IRC低负载99.74%99.87%0.07%0.07%
6、3.4552016-07-04IRC低负载99.78%99.92%0.08%0.07%3.19632016-07-05IRC低负载99.84%99.98%0.10%0.06%3.24272016-07-06IRC低负载99.80%99.93%0.19%0.06%3.2302开启前均值99.78%99.92%0.11%0.07%3.30792016-07-07IRC低负载99.40%99.94%0.09%0.06%3.24812016-07-08IRC低负载99.81%99.93%0.04%0.06%3.26622016-07-09IRC低负载99.85%99.96%0.04%0.05%3.48
7、452016-07-10IRC低负载99.82%99.93%0.05%0.05%3.47882016-07-11IRC低负载99.81%99.90%0.04%0.05%3.35622016-07-12IRC低负载99.70%99.80%0.04%0.05%3.3615开启后均值99.80%99.91%0.05%0.05%3.3659指标提升值0.02%0.00%-0.06%-0.01%0.0580 注:7月7号由于D频段帧偏置问题导致接通率指标恶化,剔除统计。在低负载场景下开启控制信道IRC功能后,各项KPI指标均在正常范围内波动,由于该功能主要协调用户间上行干扰问题,重点关注对比“系统上行每
8、个PRB上检测到的干扰噪声的平均值“、”VoLTE上行丢包率(QCI=1)(%)“两个指标变化。从上图可以从7月7号开启开启控制信道IRC功能后,系统上行每个PRC上检测的干扰噪声均值和VOLTE上行丢包率呈降低区域,对小区上行质量改善明显。6.2 高负载场景对比选取袁州区三个网格中小区内最大用户数大于150个或日均流量大于30GB小区定义为高负荷小区,共41个,对比参数优化前后对比指标。KPI指标对比:日期LTE Cell组 无线接通率RRC连接重建比率无线掉线率切换成功率(总)ESRVCC切换成功率系统上行每个PRB上检测到的干扰噪声的平均值2016-07-01IRC高负载99.67%0.
9、51%0.11%99.69%100.00%-112.13262016-07-02IRC高负载99.66%0.58%0.11%99.74%100.00%-112.31562016-07-03IRC高负载99.62%0.59%0.12%99.68%96.30%-112.49012016-07-04IRC高负载99.66%0.53%0.12%99.75%96.15%-112.33522016-07-05IRC高负载99.65%0.51%0.12%99.78%100.00%-112.24932016-07-06IRC高负载99.68%0.53%0.13%99.79%100.00%-112.4626开启
10、前均值99.66%0.54%0.12%99.74%98.74%-112.33092016-07-07IRC高负载98.86%0.63%0.16%99.79%100.00%-112.06392016-07-08IRC高负载99.73%0.74%0.04%99.70%100.00%-112.81452016-07-09IRC高负载99.77%0.84%0.05%99.64%100.00%-112.72662016-07-10IRC高负载99.77%0.68%0.04%99.74%100.00%-112.88522016-07-11IRC高负载99.79%0.62%0.03%99.77%98.21%
11、-113.05922016-07-12IRC高负载99.79%0.69%0.03%99.74%100.00%-113.3786开启后均值99.77%0.70%0.06%99.73%99.70%-112.8213指标提升值0.11%0.16%-0.06%-0.01%0.96%-0.4904注:7月7号由于D频段帧偏置问题导致接通率指标恶化,剔除统计。VOLTE指标对比:日期LTE Cell组 无线接通率(QCI=1)(%)E-RAB建立成功率(QCI=1)(%)VoLTE上行丢包率(QCI=1)(%)VoLTE下行丢包率(QCI=1)(%)VOLTE下行平均时延2016-07-01IRC高负载9
12、9.63%99.87%0.08%0.06%3.63612016-07-02IRC高负载99.56%99.79%0.07%0.07%3.70632016-07-03IRC高负载99.79%100.00%0.10%0.07%3.65942016-07-04IRC高负载99.49%99.71%0.07%0.09%3.73832016-07-05IRC高负载99.59%99.82%0.06%0.06%3.68312016-07-06IRC高负载99.79%100.00%0.23%0.07%3.6296开启前均值99.64%99.87%0.10%0.07%3.67552016-07-07IRC高负载98
13、.94%99.91%0.06%0.07%3.66672016-07-08IRC高负载99.59%99.76%0.04%0.06%3.67182016-07-09IRC高负载99.72%99.86%0.04%0.13%3.7372016-07-10IRC高负载99.73%99.87%0.06%0.08%3.63182016-07-11IRC高负载99.75%99.88%0.04%0.07%3.62542016-07-12IRC高负载99.68%99.81%0.05%0.06%3.6041开启后均值99.69%99.85%0.05%0.08%3.6561指标提升值0.05%-0.02%-0.05%0.01%-0.0193注:7月7号由于D频段帧偏置问题导致接通率指标恶化,剔除统计。从指标分析来看控制信道IRC功能开启后,在高负荷场景下降低用户间上行干扰的同时对接通率指标带来一定提升,优化后系统上行每个PRB上检测到的干扰噪声均值提升0.5dBm,在低负载场景下提升0.49dBm,整体提升效果较为明显,有效改善小区上行干扰质量。
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