LTEMTRF功能验证.docx
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LTEMTRF功能验证.docx
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LTEMTRF功能验证
LTE-MTRF功能验证
一.概述
MTRF,移动终端漫游的目的转发功能,是解决LTE覆盖跨POOL边界的语音回落问题,避免由于跨POOL边界地区而导致的CSFB失败;为此我们对MSCPOOL边界的MTRF功能进行验证测试;
MTRF,需要对现网的LTE网络以及GSM网络进行改造升级,如下:
1.在LTE覆盖区域内,升级MSC支持SGs接口为SGsMSC;
2.升级LTE网络覆盖区的SGsMSC和相邻POOL内所有的MSC均支持MTRF;
3.配置MME的SGs接口,并连接所有POOL的SGsMSC;
4.配置MME覆盖范围内TA-LA-MSC的映射关系;
二.测试准备
1)笔记本电脑一台;
2)D2及任意UE终端;
3)GENEXProbe3.6软件;
4)MSCPOOL边界测试区域;
本次MTRF功能验证,选择LTE覆盖区域的MSCPOOL1与MSCPOOL3边界,注:
MSCPOOL1为中兴的LTE-MME,MSCPOOL3为华为LTE-MME,如下图所示:
三.功能验证
3.1测试场景一(POOL1->POOL3)
验证目标:
MSCPOOL1中LTE服务小区成功回落至MSCPOOL3中GSM小区;
3.1.1测试小区信息及数据配置
1)LTE服务小区-双港供热站-HLH[135487]_2(ENODEBID:
135487,TAC:
8644,PCI:
463);归属POOL1;
Cellname
ENODEBID
PCI
TAC
DIR
MSCPOOL
双港供热站-HLH[135487]_2
135487
463
8644
180
1
2)GSM小区-白塘口村信源双港开发区4_66[4975]-HGH-1(CI:
49751,LAC:
8532,BCCH:
38);归属POOL3;
Cellname
CI
BCCH
LAC
DIR
MSCPOOL
白塘口村信源双港开发区4_66[4975]-HGH-1
49751
38
8532
55
3
3)配置添加LTE小区(135487-2)->GSM小区(49751)的38号频点及邻区关系;
测试小区回落示意图如下:
3.1.2测试回落空口信令解析
CSFB完整空口信令流程,ExternServiceRequest->Alerting,如下:
3.1.2.1占用的LTE服务小区(POOL1)
1)SystemInformationBlockType1
2)rrcConnectionReconfiguration
3.1.2.2被叫请求的业务服务类型
ExtendedServiceRequest
3.1.2.3LTE-GSM位置更新(POOL1->POOL3)
3.1.2.4回落后的GSM小区(POOL3)
1)System-information-type-6
2)rrcConnectionRelease:
回落GSM之前,在被叫接收到寻呼时刻之后进行的rrc连接释放信令中上报了目标GSM小区的38号频点,如下:
3.1.2.5LTECSFBServiceSuc
振铃Alerting
3.1.3测试验证结果反馈
本场景POOL1->POOL3跨POOL的CSFB业务合计拨打30次,全部成功回落,MTRF功能验证成功,另ExternServiceRequest->Alerting的平均时延仅为6S左右,相对LTE覆盖区域内的MSCPOOL内的CSFB时延更快,用户感知更佳。
MTRF功能验证表如下:
ExternServiceRequest
Alerting
站点添加频点
时延
被叫4G小区(ENODEBID-PCI)
被叫2G频点(CI-BCCH)
15:
49:
52.038
15:
49:
59.319
32,49,34,48,512,38,46
0:
00:
07.281
135487-463
49751-38
15:
50:
17.637
15:
50:
23.891
32,49,34,48,512,38,46
0:
00:
06.254
135487-463
49751-38
15:
50:
35.557
15:
50:
41.923
32,49,34,48,512,38,46
0:
00:
06.366
135487-463
49751-38
15:
50:
54.756
15:
51:
01.007
32,49,34,48,512,38,46
0:
00:
06.251
135487-463
49751-38
15:
51:
15.235
15:
51:
22.029
32,49,34,48,512,38,46
0:
00:
06.794
135487-463
49751-38
15:
51:
39.555
15:
51:
46.689
32,49,34,48,512,38,46
0:
00:
07.134
135487-463
49751-38
15:
52:
10.274
15:
52:
16.129
32,49,34,48,512,38,46
0:
00:
05.855
135487-463
49751-38
15:
52:
26.913
15:
52:
33.039
32,49,34,48,512,38,46
0:
00:
06.126
135487-463
49751-38
15:
52:
47.392
15:
52:
53.808
32,49,34,48,512,38,46
0:
00:
06.416
135487-463
49751-38
15:
53:
16.831
15:
53:
22.741
32,49,34,48,512,38,46
0:
00:
05.910
135487-463
49751-38
16:
03:
42.337
16:
03:
48.716
32,49,34,48,512,38,46
0:
00:
06.379
135487-463
49751-38
16:
04:
20.813
16:
04:
26.450
32,49,34,48,512,38,46
0:
00:
05.637
135487-463
49751-38
16:
04:
46.863
16:
04:
52.738
32,49,34,48,512,38,46
0:
00:
05.785
135487-463
49751-38
16:
05:
16.302
16:
05:
22.686
32,49,34,48,512,38,46
0:
00:
06.384
135487-463
49751-38
16:
05:
41.901
16:
05:
48.084
32,49,34,48,512,38,46
0:
00:
06.183
135487-463
49751-38
16:
06:
02.380
16:
06:
08.590
32,49,34,48,512,38,46
0:
00:
06.210
135487-463
49751-38
16:
06:
22.531
16:
06:
28.536
32,49,34,48,512,38,46
0:
00:
06.005
135487-463
49751-38
16:
06:
43.338
16:
06:
49.540
32,49,34,48,512,38,46
0:
00:
06.202
135487-463
49751-38
16:
07:
03.817
16:
07:
10.073
32,49,34,48,512,38,46
0:
00:
06.256
135487-463
49751-38
16:
07:
26.857
16:
07:
33.735
32,49,34,48,512,38,46
0:
00:
06.878
135487-463
49751-38
16:
07:
47.336
16:
07:
54.208
32,49,34,48,512,38,46
0:
00:
06.872
135487-463
49751-38
16:
08:
05.255
16:
08:
10.707
32,49,34,48,512,38,46
0:
00:
05.452
135487-463
49751-38
16:
08:
20.614
16:
08:
27.982
32,49,34,48,512,38,46
0:
00:
07.368
135487-463
49751-38
16:
08:
38.534
16:
08:
44.223
32,49,34,48,512,38,46
0:
00:
05.689
135487-463
49751-38
16:
08:
56.453
16:
09:
03.931
32,49,34,48,512,38,46
0:
00:
07.487
135487-463
49751-38
3.2测试场景二(POOL3->POOL1)
验证目标:
MSCPOOL3中LTE服务小区成功回落至MSCPOOL1中GSM小区;
3.2.1测试小区信息及数据配置
1)LTE服务小区-双港新家园3信源景荔路与领世路交口-HLH[135491]_1(ENODEBID:
135491,TAC:
8532,PCI:
186);归属POOL3;
Cellname
ENODEBID
PCI
TAC
DIR
MSCPOOL
双港新家园3信源景荔路与领世路交口-HLH[135491]_1
135491
186
8532
60
3
2)GSM小区-景蓉路与新家园路交口_126[23646]-2(CI:
36468,LAC:
8644,BCCH:
55);归属POOL1;
Cellname
CI
BCCH
LAC
DIR
MSCPOOL
景蓉路与新家园路交口_126[23646]-2
36468
55
8644
180
1
3)配置添加LTE小区(135491-1)->GSM小区(36468)的55号频点及邻区关系;
测试小区回落示意图如下:
3.2.2测试回落空口信令解析
CSFB完整空口信令流程,ExternServiceRequest->Alerting,如下:
3.2.2.1占用的LTE服务小区(POOL3)
1)SystemInformationBlockType1
2)rrcConnectionReconfiguration
3.2.2.2被叫请求的业务服务类型
ExtendedServiceRequest
3.2.2.3LTE-GSM位置更新(POOL3->POOL1)
3.2.2.4回落后的GSM小区(POOL1)
1)System-information-type-6
2)rrcConnectionRelease:
回落GSM之前,在被叫接收到寻呼时刻之后进行的rrc连接释放信令中上报了目标GSM小区的55号频点;注:
为保证该场景下的业务验证质量,删除本POOL内(POOL3)的所有GSM频点,只添加跨POOL(POOL1)的55号频点;
3.2.2.5LTECSFBServiceSuc
振铃Alerting
3.2.3测试验证结果反馈
本场景POOL3->POOL1跨POOL的CSFB业务合计拨打30次,亦全部成功回落,MTRF功能验证成功,另ExternServiceRequest->Alerting的平均时延亦为6S左右,相对LTE覆盖区域内的MSCPOOL内的CSFB时延较短,体验相对POOL内更好。
MTRF功能验证表如下:
ExternServiceRequest
Alerting
站点添加频点
时延
被叫4G小区(ENODEBID-PCI)
被叫2G频点(CI-BCCH)
10:
39:
50.889
10:
39:
57.670
55
0:
00:
06.781
135491-186
36468-55
10:
40:
12.648
10:
40:
20.600
55
0:
00:
07.952
135491-186
36468-55
10:
40:
30.568
10:
40:
37.089
55
0:
00:
06.512
135491-186
36468-55
10:
40:
48.487
10:
40:
54.649
55
0:
00:
06.162
135491-186
36468-55
10:
41:
03.846
10:
41:
09.552
55
0:
00:
05.706
135491-186
36468-55
10:
41:
24.325
10:
41:
30.209
55
0:
00:
05.884
135491-186
36468-55
10:
41:
44.804
10:
41:
50.650
55
0:
00:
05.846
135491-186
36468-55
10:
42:
01.443
10:
42:
07.472
55
0:
00:
06.029
135491-186
36468-55
10:
42:
16.802
10:
42:
24.632
55
0:
00:
07.830
135491-186
36468-55
10:
42:
34.721
10:
42:
44.661
55
0:
00:
09.940
135491-186
36468-55
10:
42:
50.080
10:
42:
56.337
55
0:
00:
06.257
135491-186
36468-55
10:
43:
04.160
10:
43:
09.610
55
0:
00:
05.450
135491-186
36468-55
10:
43:
19.519
10:
43:
25.486
55
0:
00:
05.967
135491-186
36468-55
10:
43:
34.878
10:
43:
41.980
55
0:
00:
07.102
135491-186
36468-55
10:
43:
50.237
10:
43:
56.684
55
0:
00:
06.447
135491-186
36468-55
10:
44:
05.596
10:
44:
11.619
55
0:
00:
06.023
135491-186
36468-55
10:
44:
19.675
10:
44:
25.035
55
0:
00:
05.360
135491-186
36468-55
10:
44:
35.034
10:
44:
40.680
55
0:
00:
05.646
135491-186
36468-55
10:
44:
47.834
10:
44:
53.409
55
0:
00:
05.575
135491-186
36468-55
10:
45:
04.473
10:
45:
09.991
55
0:
00:
05.518
135491-186
36468-55
10:
45:
21.112
10:
45:
27.302
55
0:
00:
06.190
135491-186
36468-55
10:
45:
37.751
10:
45:
44.013
55
0:
00:
06.262
135491-186
36468-55
四.总结
本次MTRF功能业务验证,在两种不同的测试场景下实现,通过跨POOL的CSFB回落操作,反复进行MTRF功能验证测试,验证结果跨POOL的CSFB回落成功率100%,平均呼叫建立时延在6S左右,与POOL内CSFB回落的成功率及时延相比,MTRF功能明显。
另MTRF在网优无线的数据配置上,POOL边界站点只需配置跨POOL的GSM主BCCH即可,无需规划邻区;
操作方向
CSFB请求次数
CSFB成功次数
CSFB成功率
CSFB平均时延
POO1-POOL3
30
30
100%
6s
POO3-POOL1
30
30
100%
6s
POOL池内
/
/
/
8s-10s
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