高铁场景4G语音创新方案研究及部署建议

doi:10.11959/j.issn.1000-0801.2015360

Abstract

Abstract:

High-speed railway is a special scenario of 4G network coverage,the project planning and construction of high-speed railway 4G network coverage have special difficulty,wireless coverage is different.High-speed railway scenario 4G voice solution needs to use different voice deployment strategy according to the quality of wireless coverage.The current situation of high-speed 4G network planning index and the ability to support voice services were analyzed,the alternative voice program under the high-speed railway 4G coverage was researched.Considering enhancing the user experience and feasibility,the feasible high-speed railway scene 4G voice service deployment recommendations was put forward.

Key words: high-speed railway, 4G, voice solution

DePing XU,XiangChen MA,RiTao CHENG,LuJing GENG. Research and deployment on the innovation solution for 4G voice of high-speed railway scenario[J]. Telecommunications Science, 2015, 31(Z1): 48-52.

项目	下行信道（郊区、农村F频段）				上行信道（郊区、农村F频段）
项目	RS信号	数据业务（1 Mbit/s）	语音（12.65 kbit/s）	语音（23.85 kbit/s）	数据业务（64 kbit/s）	语音（12.65 kbit/s）	语音（23.85 kbit/s）
最小接收电平/dBm	-113	-94.8	-99.4	-97.1	-112.3	-117.6	-113
RS发射功率/dBm	15.2	39	33.8	33.8	17	14	14
天线增益/dBi	0	20	20	20	20	20	20
馈线及接头损耗/dB	0.5	0.5	0.5	0.5	0.5	0.5	0.5
RS接收分集增益/dB	2	0	0	0	0	0	0
阴影衰落余量/dB	6.22	6.22	6.22	6.22	6.22	6.22	6.22
车体穿透损耗/dB	28	28	28	28	28	28	28
车内最大允许路径损耗/dB	115.48	119.14	118.44	116.14	114.63	116.86	112.26
传播模型截距/dB	122.91	122.91	122.91	122.91	122.91	122.91	122.91
传播模型斜率	35.22	35.22	35.22	35.22	35.22	35.22	35.22
覆盖半径/m	615	781	746	642	582	673	498

场景	小区内/间	站/杆间距/km
城区 F频段	小区内	1
	小区间	0.8
城区 D频段	小区内	0.6
	小区间	0.4
郊区、农村F频段	小区内	1.2
	小区间	1.0
泄漏电缆	小区内	0.7
	小区间	0.5

业务	网络覆盖情况				VoLTE业务质量
业务	平均RSRP	平均SINR	平均MOS	MOS＞3.5的概率	95%MOS	MOS＞2.5的概率	平均PLR	PLR＜1%的概率
VoLTE 23.85 kbit/s	-83.72	11.1	3.57	65.70%	1.82	83.90%	3.64%	82.90%
VoLTE 12.65 kbit/s	-92.77	11.29	3.76	81%	2.33	93.20%	1.21%	92.74%

序号	方案	适用线路情况	方案说明
1	CSFB语音方案	不能实现VoLTE连续覆盖（因未完全建成或站址间距较大）	核心网升级（该功能为核心网三期设备采购可选功能要求）
2	23.85 kbit/s语音业务	4G网络覆盖达到调整规划指标（RSRP＞-110 dBm、RS-SINR＞-3 dB）	已线路需要按照调整后的规划指标及站间距要求进行网络改造；新建线路按照调整后的规划指标及站间距要求进行规划建设；影响工程实施进度；增加投资约数十亿元
3	12.65 kbit/s语音业务	4G网络覆盖达到原规划指标（RSRP＞-113 dBm、RS-SINR＞-3 dB）	属于非标的实现方案，需核心网进行开发及改造；已经建设/实施线路无线设备升级

[1]	中国移动通信集团有限公司. 4G网络高速铁路覆盖技术要求[EB/OL].[ 2015-04-30]. .China Mobile Communications Corporation. 4G network high-speed railway coverage technical requirements[EB/OL].[ 2015-04-30]. .
[2]	中国移动通信集团有限公司. 关于高速铁路覆盖网络建设的指导意见[EB/OL].[ 2014-11-25]. .China Mobile Communications Corporation. Guiding opinions on the 4G network coverage of high-speed railway[EB/OL].[ 2014-11-25]. .

Research and deployment on the innovation solution for 4G voice of high-speed railway scenario

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