Lecture describing evolution from legacy terminal access on IMS towards flexible browser-based communication. Includes mandatory content such as IMS components & signaling, VoLTE, etc. but deducts reasoning from carrier evolution and transformations seen in practise. A few words about Internet based communication services and WebRTC should support discussion. Presented 2015-12-09 at Slovak University of Technology

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6. Services
Data/IPNetworks
MobileNetworks
PSTN/ISDN
CATV
Access Transport & Switching Networks
Wireless
Access
Wireline
Access
IP Backbone
Existing and newly
emerging services
Service & Network Control
(QoS, Security, IP Mobility)
Too costly, per-service network
architecture
Single/simple/cost-effective network
infrastructure for existing & new services

7. Access & Transport
Plane
Core
Network
Session
Control Plane
Service Architecture
Applications/Services
Plane
HSSCSCF
Access
Networ
k
Other
Networks
Web Portal
Application
Servers
Session
Control
Centralized
Databases
Media
Control &
Gateways
Media
Server

8. Voice/video
SMS/MMS
Instant
messaging
Mail
Voice/Video/IM
Conferencing/App
sharing/MM chat/
Others
content content
Shared content
Today services Integrated „all-IP“ services

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VoLTE

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PCRF
P-CSCF
HSS
Rx
I-CSCF
S-CSCF
ASSh
Cx
Cx
Mw
Mw
Mw
ISC
MGCF
MGWMg
VCC AS
ISC
Sh
ATCF
ATGW
MwMw
Mw

45. Wi-Fi (untrusted)
UTRAN
GERAN
BTS
AuC
2G
BSC
NodeB RNC SGSN GGSN
HLR
MSC GMSCAbis A
Iu-CS
Iub
Gs
Gn
E
D C
Gr Gc
VLR
B
Gb
PCRF
Gx
PSTN
Internet
E-UTRAN
eNodeB
EPC
MME
SGW
PDN
GW
P-CSCF
HSSS6a
S1-C/S1-MME
S1-U S5
SGi
S7
Rx
I-CSCF
S-CSCF
ASSh
Cx
Cx
Mw
Mw
Mw
ISC
Gi
MGCF
MGWMg
ePDG
S2b/SMOGWi-Fi
AP
AAASWm
SWx
SWn
S4
S3
H
3G
4G
Iu-PS
Iur
S11
Wi-Fi
I2
SGs
VCC AS
ISC
Sv
MAP
D’/Gr’
SGi
UE
UE
UE
UE
LTE-UU
Uu
Um
Sh
Wi-Fi (trusted)
Wi-Fi
AP
Wi-Fi
UE
MC-GW
(eq.SGW)
SWa
SWu
S2c
App access
ATCF
ATGW
Mw
I2
Mw
Mw
S6b
Wi-Fi (untrusted)
UTRAN
GERAN
BTS
AuC
2G
BSC
NodeB RNC SGSN GGSN
HLR
MSC GMSCAbis A
Iu-CS
Iub
Gs
Gn
E
D C
Gr Gc
VLR
B
Gb
PCRF
Gx
PSTN
Internet
E-UTRAN
eNodeB
EPC
MME
SGW
PDN
GW
P-CSCF
HSSS6a
S1-C/S1-MME
S1-U S5
SGi
S7
Rx
I-CSCF
S-CSCF
ASSh
Cx
Cx
Mw
Mw
Mw
ISC
Gi
MGCF
MGWMg
ePDG
S2b/SMOGWi-Fi
AP
AAASWm
SWx
SWn
S4
S3
H
3G
4G
Iu-PS
Iur
S11
Wi-Fi
I2
SGs
VCC AS
ISC
Sv
MAP
D’/Gr’
SGi
UE
UE
UE
UE
LTE-UU
Uu
Um
Sh
Wi-Fi (trusted)
Wi-Fi
AP
Wi-Fi
UE
MC-GW
(eq.SGW)
SWa
SWu
S2c
App access
ATCF
ATGW
Mw
I2
Mw
Mw
S6b

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

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 
1Ericsson

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57. 
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1Dean Bubley, Martin Geddes: Future of Voice. October 2013.
2Dean Bubley, Blog 2014

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64. 1Voxeo Labs: IMS World Forum - WebRTC workshop. “WebRTC - it’s [almost] here!

65. 1Voxeo Labs: IMS World Forum - WebRTC workshop. “WebRTC - it’s [almost] here!

66. 1Voxeo Labs: IMS World Forum - WebRTC workshop. “WebRTC - it’s [almost] here!

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84. IMS
Subscriber
Private
UID 2
Private
UID 1
Public
UID 1
Public
UID 3
Public
UID 2
Public
UID n
.
.
.
}Implicit Set

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86. P-CSCF
DNS
UE

87. 
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 ngnlab.eu. 7200 IN NAPTR 10 50 "s“ "SIP+D2T“ _sip._udp.ngnlab.eu.

 _sip._udp.ngnlab.eu. 7200 IN SRV 0 0 5060 icscf.ngnlab.eu.

 icscf.ngnlab.eu. 7200 IN A 147.175.103.213

88. P-CSCF I-CSCF S-CSCF
DNS
UE
HSS

89.  P-Access-Network-Info
 From To
 Path

 Route
 Authorization
 Service-Route
 Route

90. 
 P-Preferred-Identity
 P-Asserted-Identity
 P-Associated-URI
 Event: reg

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92. P-CSCF I-CSCFS-CSCF
DNS
UE

93. P-CSCFI-CSCF S-CSCF
HSS
UE
To simplify matters, DNS is omitted in these slides.

94.  MESSAGE

 SUBSCRIBE NOTIFY
 PUBLISH

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107. Author
Version