诺基亚异频负载均衡报告0315AMLEWord文件下载.docx
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thresholdRsrpIFLBFilter参数门限
iFLB与AMLE的区别:
iFLB
AMLE
当小区达到高负载门限时,iFLB提供负载均衡
AMLE将小区与配对邻区的负载差异控制在所设的负载差值以
iFLB的目的是把小区的负载控制在所设的负载门限下,而不是平衡小区间的负载
候选邻区的筛选过程类似iFLB
负载的信息只在同个eNB的小区间分享;
对于不同eNB小区使用的是盲切换,不根据邻区的负载情况来判断
小区间使用资源状态报告(RSR)来分享负载情况,不使用盲切换,对于没有RSR的邻区将不会被切换
2.负载均衡功能测试
2.1异厂家负载均衡功能测试
为进行Nokia和HWLTE基站间负载均衡的实验,选定实验点为首都机场T1出发厅。
如下图所示,涉及到的Nokia小区为机场T1F2至F3层公共区NLM(ENBID:
76309),涉及到的HW基站为顺义首都机场T1航站楼F2F3东侧办公餐饮区及出港大厅HLM499769-132。
2.1.1参数设置
开启featureLTE1531:
Inter-frequencyLoadBalancingExtension(开启iFLB)
ParameterName
ParameterFullName
MOC
默认值
修改值0301
9:
06~13:
00
修改值0226-2
10:
45~11:
30
修改值0226-1
00~10:
actInterFreqLB
Activationofinterfrequencyloadbalancing(iFLB)
LNBTS
false
TRUE
thresholdRsrpIFLBFilter
Inter-Frequency
LBThresholdforRSRPTargetFilter
LNHOIF
-98
-95
thresholdRsrqIFLBFilter
LBThresholdforRSRQTargetFilter
-12
targetLoadGbrDl
DLGBRresourcetargetload
LNCEL
50
targetLoadNonGbrDl
DLnon-GBRresourcetargetload
75
5%
8%
targetLoadPdcch
PDCCHtargetload
3%
50%
iFLBHighLoadGBRDL
Inter-FrequencyLoadBalancingDLGBRHighLoad
60
iFLBHighLoadNonGBRDL
Inter-FrequencyLoadBalancingDLnon-GBRHighLoad
85
10%
iFLBHighLoadPdcch
Inter-FreqLoadBalancingPDCCHHighLoad
80
80%
7%
nomNumPrbNonGbr
NominalnumberofPRBsforloadbalancing
1
10
iFLBBearCheckTimer
Inter-FrequencyLoadBalancingQCI1BearerCheckTimer
12
prohibitLBHOTimer
ProhibitLoadBasedHandoverTimer
iFLBRetryTimer
InterFreqLoadBalRetryTimer
开启featureLTE1841:
Inter-FrequencyLoadEqualization(开启AMLE)
MOClass
修改值3月1日
16:
39:
actIfHo
EnableinterFrequencyhandover
enabled
actAmle
Activateactivemodeloadequalization
ProhibitLoadbasedhandovertimer
LNREL
amleAllowed
Activemodeloadequalizationallowed
removeAllowed
Removeallowed
true
FALSE
Inter-freqloadbalthresholdforRSRPtargetfilter
Inter-freqloadbalthresholdforRSRQtargetfilter
不设置
cellResourceSharingMode
Cellresourcesharingmode
none
threshold2InterFreq
Thresholdth2interFreqforRSRP
-100
-90
threshold2a
Thresholdth2aforRSRP
-96
-87
60s
Inter-frequencyloadbalancingGBRhighloadDL
60%
Inter-frequencyloadbalancingnon-GBRhighloadDL
Inter-frequencyloadbalancingPDCCHhighload
Inter-frequencyloadbalancingQCI1Bearerchecktimer
12s
cellCapClass
Cellcapacityclassvalue
100
mlbEicicOperMode
ModeforcalculatingtheCACinloadbal.andeICIC
allUes
ulStaticCac
StaticCACforuplink
ulCacSelection
UplinkCACsourceselection
ulReflectDlCac
LNCEL-AMLEPR
amlePrId
0/1
deltaCac
DifferenceinCACofsourceandtargetcells
20
HeadroominCAC
targetCarrierFreq
Targetcarrierfrequency
39148
ThresholdformaximumCAC
2.1.2实验效果
开启featureLTE1531后,指标统计Nokia76309-1和HW499769-132基于iFLB的LBHO全部成功,信令显示触发原因为reduce-load-in-serving-cell,符合预期。
SDATETIME
ENB_CELL
HO_LB_ATT
HO_LB_SUCC
HIGH_CELL_LOAD_LB
76309-1
18
5
4
25
7
32
28
91
3
16
11
5
76309_1
0
43
215
8
62
14
22
51
44
146
15
71
2
52
40
170
33
17
13
开启featureLTE1841后,指标统计LBHO有尝试计数,信令显示触发原因也为reduce-load-in-serving-cell,但同时也开启了iFLB,为了区分LB基于具体feature,抓取wireshark,Nokia小区有发起资源请求,但未出现厂家间资源信息交互。
47
36
156
55
46
229
76309向HW小区发起的资源请求消息类型为CompositeAvailableCapacityPeriodic,周期性综合可用容量。
IE/GroupName
Presence
Range
IEtypeandreference
Semanticsdescription
Criticality
AssignedCriticality
ReportCharacteristics
O
BITSTRING
EachpositioninthebitmapindicatesmeasurementobjecttheeNB2
isrequestedtoreport.
YES
reject
(SIZE(32))
FirstBit=PRBPeriodic,
SecondBit=
TNLloadIndPeriodic,
ThirdBit=HWLoadIndPeriodic,
FourthBit=CompositeAvailableCapacityPeriodic.
Bits5to32shallbeignoredbytheeNB2
2.2同厂家同站双载波负载均衡功能测试
为进行Nokia同站各载波间负载均衡的实验,选定实验点为76413机场2号航站楼出发厅南侧NLM,该站点两个载波业务量和用户数分布不均。
2.1.3参数设置
修改值
3.210:
2.1.4实验效果
修改后76413两载波用户数实现均衡,1小区用户数下降,PRB利用率下降,同时11小区用户数增加,PRB利用率有所上升。
由于是站切换无明显log显示LBHO,但切换事件均为LB切换的所用事件A4,符合预期。
76413_1
138
137
120
118
172
169
237
243
240
264
262
210
205
207
203
142
140
139
154
230
228
197
196
219
211
216
222
218
168
165
171
125
122
162
161
217
214
233
231
251
245
258