Download VoLTE and ViLTE: voice and conversational video services by André Perez PDF
By André Perez
This publication offers the structure of 2 networks that make up the spine of the phone carrier VoLTE and video provider ViLTE. The 4G cellular community makes it attainable to build bearers in which IP packets, containing both mobile indications (SIP, SDP) or voice or video media (RTP stream), are transported.
The IMS community plays the processing of the phone sign to supply VoLTE and ViLTE prone, together with name routing and the availability of extra prone. diverse tactics are defined: the set-up and termination of a consultation, interconnection with third-party networks, roaming and intra-system handover.
The inter-system handover PS-CS is a unique case that happens whilst the cellular loses 4G community assurance over the process a consultation. The e-SRVCC mechanism permits continuity of the carrier through the swap of the phone conversation to the 2G or 3G networks. The SMS carrier for brief messages, that's a unique cell provider in itself, is equipped through buildings, one hoping on the IMS community, and a moment at the CSFB functionality.
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Extra resources for VoLTE and ViLTE: voice and conversational video services over the 4G mobile network
The APN-AMBR parameter controlled by the PGW entity corresponds to the maximum bit rate authorized for all the streams of a mobile phone using non-GBR bearers at the PGW entity level. The UE-AMBR parameter controlled by the eNB entity corresponds to the maximum authorized bit rate for all streams of a mobile phone using non-GBR bearers, at the eNB entity level. The pre-emption implemented at the eNB and PGW entity level corresponds to the ARP parameter that defines the following information: – pre-emption capability: this parameter is used for the establishment of a new session, if the resource is not available.
Network Architecture 7 The S1-AP protocol also provides transport of the NAS protocol exchanged between the mobile and the MME entity. The S11 interface is the reference point between the MME and SGW entities for signaling via the GPRS (General Packet Radio Service) tunnel control protocol (GTPv2-C). The S5 interface is the reference point between the SGW and PGW entities for signaling via the GTPv2-C protocol and traffic data (IP packets) via the GPRS tunnel protocol user (GTP-U). The S10 interface is the reference point between the MME entities for signaling, via the GTPv2-C protocol.
The PGW entity is the only EPS mobile network entity that routes traffic data (IP packets). The IP transport network that enables communication between the EPS network entities routes the S1 or S5 bearers. The eNB and SGW entities do not perform routeing. They only provide the connection between the bearers. There are two types of bearers in the EPS network: – the default bearer established when attaching the mobile, used for example to transport SIP signaling; – the dedicated bearer, established following a specific request from the mobile, used for example for transport of real time protocol (RTP) streams containing voice or video.