VoLTE业务与技术实现方案的研究与分析

doi:10.3969/j.issn.1000-0801.2013.02.006

Abstract

Abstract:

Voice service is one of the basic services that the mobile internet carrier provides for its users. There are severa1 schemes to carry on the voice service in LTE era. The VoLTE scheme was focused on and had been studied both in theoretica1 and implementation views. Based on the 3GPP standards，the key technologies of VoLTE had been clarified，and the network architecture was also studied. Specifica11y，the interoperability between VoLTE and the 1egacy networks was analyzed to guarantee the continuity of service. Additiona11y，suggestions were given for the VoLTE development and business conducting.

Key words: VoLTE, IMS, SRVCC, QoS

Feng Zhou,Zhengfeng Xu,Jun Luo. Study and Analysis of VoLTE Service and Its Implementation[J]. Telecommunications Science, 2013, 29(2): 31-35.

	SVLTE	CSFB	VoLTE
话音承载方式	2G/3G电路域	2G/3G电路域	LTE数据域
网络要求	无网络改造要求	对网元和接口有要求	基于IMS提供业务
终端要求	双收双发；电池消耗大	无需双收双发；电池消耗较小	无需双收双发；终端支持SIP的VoIP
网络覆盖要求	无需LTE全覆盖	无需LTE全覆盖	目前需要LTE良好覆盖
话音/数据并发	可话音/数据并发	对1x CSFB方案，在双收双发时才可实现话音/数据并发	可话音/数据并发
话音建立时延	与电路域相同	稍逊于电路域时延	比电路域更快
运营商应用	Verizon等CDMA运营商	AT&T、NTT DoCoMo、SK电讯	LG U+、SK电讯、Metro PCS等

QCI	资源类型	优先级	时延	分组丢失率	典型业务	说明
1	GBR	2	100 ms	10^-2	话音会话	VoLTE话音媒体流
2	GBR	4	150 ms	10^-3	会话视频（实时流）
3	GBR	3	50 ms	10^-3	实时游戏
4	GBR	5	300 ms	10^-6	非会话视频（缓存流）
5	NGBR	1	100 ms	10^-6	IMS信令	VoLTE SIP信令
6	NGBR	6	300 ms	10^-6	视频（缓存流）
7	NGBR	7	100 ms	10^-3	互动游戏
8	NGBR	8	300 ms	10^-6	视频（缓存流）（如网页浏览、邮件、聊天、FTP等）
9	NGBR	9	300 ms	10^-6	——

1	赵训威，林辉，张明等. 3GPP长期演进（LTE）系统架构与技术规范. 北京：人民邮电出版社， 2010
2	3GPP TS 36.300. Evolved Universa1 Terrestria1 Radio Access （E-UTRA）and Evolved Universa1 Terrestria1 Radio Access Network（E-UTRAN）；Overa11 Description；Stage 2， 2008
3	VoLTE 的演进与部署. ， 2011
4	3GPP TS 23.272. Circuit Switched （CS）Fa11back in Evolved Packet System（EPS）；Stage 2， 2009
5	GSMA IR 92.V4.0.IMS Profile for Voice and SMS， 2012
6	3GPP TS 23.228 V9.4.0.IP Multimedia Subsystem（IMS）；Stage 2（Release 9）， 2010
7	3GPP TS 23.216.Technica1 Specification Group Services and System Aspects；Single Radio Voice Ca11 Continuity（SRVCC）；Stage 2（Release 8）， 2011s

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Study and Analysis of VoLTE Service and Its Implementation

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