基于信令消息的VoLTE接续时延优化

doi:10.11959/j.issn.1000-0801.2017040

Abstract

Abstract:

VoLTE wireless spectrum utilization efficiency is better than that of the traditional CS voice.The introduction of high-definition voice and video codes significantly improves the communication quality.VoLTE call setup duration has been significantly shortened compared to the traditional CS voice.Analyzing the factors in causing call setup delay of VoLTE was focused,and corresponding solutions about the VoLTE call setup delay optimization was put forward based on the signaling message in different stages,including paging,domain selection,resource reservation.

Key words: paging strategy, domain selection, call setup delay

CLC Number:

TN929.5

Bao GUO,Yang ZHANG. VoLTE call setup delay optimization based on signaling message[J]. Telecommunications Science, 2017, 33(2): 144-153.

Figures/Tables 17

References 15

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序号	场景	呼叫接续时延/s
1	主叫为VoLTE(LTE)，被叫为VoLTE(LTE)	3.072
2	主叫为VoLTE(LTE)，被叫为VoLTE(CS)	8.15
3	主叫为VoLTE(CS)，被叫为VoLTE(CS)	10.5
4	主叫为VoLTE(LTE)，被叫为CSFB	7.034

场景	主叫到被叫I-CSCF的invite路由时延/ms	业务触发和域选时延/ms	媒体协商资源预留时延/ms	资源预留完成到被叫振铃时延/ms	共计/ms
VoLTE(LTE)-VoLTE(LTE)	261.6	235.6	1 779	0.2	2 276.4

场景	主叫到被叫I-CSCF的invite路由时延/ms	业务触发和域选时延/ms	媒体协商资源预留时延/ms	资源预留完成到被叫振铃时延/ms	共计/ms
VoLTE(LTE)-VoLTE(CS)	232	588.2	1 162.2	5 761.8	7 744.2

场景	主叫到被叫I-CSCF的invite路由时延/ms	业务触发和域选时延/ms	媒体协商资源预留时延/ms	资源预留完成到被叫振铃时延/ms	共计/ms
VoLTE(CS)-VoLTE(CS)	预计2~3s	714.4	426	5 887	7 027.4
	（核心网侧无法跟踪）		（不含传递到MO的时延）	（不含传递到MO的时延）	（整段约10 s）

定时器	取值范围	调整值
N3413（寻呼重发次数）	0~5次	4次
T3413（寻呼重发间隔）	3~12 s	3s

VoLTE call setup delay optimization based on signaling message

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Figures/Tables 17

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呼叫次数/次	VoLTE呼叫建立时延/s	备注
51	2.89	永久在线定时器设置为10 s
46	2.19	永久在线定时器设置为20 s

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