诺基亚异频负载均衡报告0315AMLE文档格式.docx
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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内
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小区为朝阳机场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
201602261000
76309-1
18
201602261015
4
25
201602261030
7
32
201602261045
28
91
201602261100
3
16
201602261115
11
201602261130
201603010945
76309_1
201603011000
43
215
201603011015
8
62
201603011030
201603011045
14
201603011100
22
201603011115
51
44
146
201603011130
201603011145
15
71
201603011200
2
201603011215
52
40
170
201603011230
33
201603011245
17
201603011300
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。
201603011600
201603011615
201603011630
47
36
156
201603011645
55
46
229
201603011700
201603011715
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同站内各载波间负载均衡的实验,选定实验点为76413朝阳机场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
开启featureLTE1841:
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。
由于是站内切换无明显log显示LBHO,但切换事件均为LB切换的所用事件A4,符合预期。
201603020800
76413_1
201603020815
201603020830
201603020845
201603020900
201603020915
201603020930
201603020945
201603021000
138
137
201603021015
120
118
201603021030
172
169
201603021045
237
201603021100
243
240
201603021115
264
262
201603021130
7641