LTE语音业务几种常见的解决方案(VOLTE、CSFB、SRVCC)
SRVCC ➢SRVCC Is a handover process of a voice call previously started in LTE(VoLTE call) to legacy network for call continuity. ➢It is a call transfer method (handover), when an LTE user has an active voice session in IMS and is moving to areas without LTE coverage, but with leg...
双待机- CSFB终端-SRVCC终端 主要内容 LTE承载语音策略 LTE承载语音方案介绍 SRVCC方案优化 LTE终端提供语音业务的可选技术方案 方案1 – SR-VCC 基于IMS提供VoIP,考虑到LTE/SAE发展到中度覆盖时需要提供PS域和CS域的single mode下的语音呼叫连续性的处理,因此提出SR-VCC方案 SR-VCC关注呼叫会话的连续性,因此本质...
(PS) access is provided, the call involving said handover party and another party, said call being anchored in an Service Centralization and Continuity Application Server (SCC AS) of the IP- Multimedia-Subsystem (IMS), the method comprising the steps of receiving (202) an indication that the...
目前针对LTE语音业务的互操作,主要有三种候选 2、技术:CSFB, SRVCC, VoLGA.CSFB:该观点认为,在LTE部署初期,运营商主要提供宽带数据业务,语音业务可以利用传统的GSM网络,由于GSM网络有很高的覆盖率并经过长期优化,因此在LTE部署初期,用户仍然可以得到高质量的语音服务。在这种策略的指导下,3GPP发展了CSFB技术,当用户...
所有终端都统一到LTE无线技术，且均由LTE承载接入IMS。阶段3中底层无线网络间的切换对IMS域应该是透明不...
VoLTE_SRVCC基本原理与系统结构 VoLTE网络架构 2G/3GMGWMSSGERAN/UTRANIMSMGWMGCFTASBGCFMRFPIMS SGSN UELTE HLRIMSHSSS-CSCFI-CSCF HLR/HSS LTEHSS PCRF MME P-CSCF MRFC MRFP eNodeB SGW PGW A-BGW VoLTE网元列表 网元名称 eNodeB 网元所属域 LTE无线EPC核心网EPC核心网EPC核心网R4核心网互通关口局设备互通...
对传统2G/3G网络有改造要求,时延较长,语音呾数据业务丌可并収•特点:语音业务基亍IMS提供,并支持从LTE切换到2G/3G网络的语音连续性•优势:基亍LTE的语音,音质好,频谱利用率高,语音呾数据业务可以并収•劣势:需要部署IMS,终端支持SRVCC的终端较少INTRENETVoiceflowVoLTE介绍eSRVCC语音方案eSRVCC切换时延分析eSRVCC...
SRVCC functionality is required within VoLTE systems to enable the packet domain calls received in LTE to be handed over to a legacy circuit-switched (CS) voice system, such as CDMA2000 1xRTT. SRVCC for 1xRTT, also referred to as enhanced SRVCC, enables the MME to move a VoLTE ...
流鲨 (FlowShark) 是2016年开始流行的信令分析工具，除了支持Volte(IMS+EPC)的信令分析，流鲨还支持四大...