IP Multimedia SubsystemPart 7
Marek Ś[email protected]
Institute of Telecommunications
Project is co-financed by European Union within the European Social FundEIMS -2016
MMTel – Multimedia telephony
ISDN/PSTN Simulation Services
MMTel
EIMS -2016
IMS MMTel
EIMS -2016
MMTel as an alternative for Skype
• Chat: text message delivery
• Voice and video communications
• File (pictures, video clips, data files etc.) transfer
• Point to point and point to multi-point communications
• Dynamic session add-on and removal
• Presence-enabled address book
• Terminal capability adaptation
EIMS -2016
MMTel Services
• Multimedia conversational communications between two or more users
– Real time bidirectional conversational transfer of speech, video or optionally other types of data
– Point to point communications between terminals or a terminal and a network entity
• Symmetrical or asymmetrical communications
– Media components present in each direction may be different, or they may be the same but with different bit rates and Quality of Service
– Can be started with only one type of media and additional types of media may or may not be added by the users as the communication progress.
– Media can be removed on request
– Communication persists as long as there is at least on connected media
EIMS -2016
MMTel Services
• Support for supplementary services– The behaviour of these services is almost identical to supplementary
services for CS voice (TS 11) and PSTN/ISDN.
– When a supplementary service is invoked it applies to all media components
– supplementary service can be activated by the user for one or more types of media components.
– If one or more of these media components are present, the supplementary service is invoked.
• Universal availability & accessibility– Users are provided with the services regardless of operator and access
technology.
EIMS -2016
Multimedia Telephony Service• Multiple Simultaneous Media Streams
– Voice– Text– Video– File Transfer– Video/Photo/Audio Sharing
• Multimedia analogs of traditional PSTN supplementary services– Originating Identification Presentation (OIP)– Originating Identification Restriction (OIR)– Terminating Identification Presentation (TIP)– Terminating Identification Restriction (TIR)– Malicious Communication IDentification (MCID)– Anonymous Communication Rejection (ACR)– Communication Diversion (CDIV)– Communication Waiting (CW) – Communication Hold (HOLD)– Communication Barring (CB)– Completion of Communications to Busy Subscriber (CCBS)– Message Waiting Indication (MWI)– Conference (CONF)– Advice Of Charge (AOC)– Explicit Communication Transfer (ECT)– Reverse charging – Closed User Group (CUG)– Three-Party (3PTY)
EIMS -2016
MMTel
• Full duplex speech
• Real time video (simplex, full duplex), synchronized with speech if present
• Text communication
• File transfer
• Video clip sharing, picture sharing, audio clip sharing– Transferred files may be displayed/ replayed on receiving terminal for
specified file formats.
• PSTN/ISDN like supplementary services
EIMS -2016
MMTel: support of SIP signalling
• Usage of additional SIP mechanisms
– IMS Communication Service Identification (ICSI)
– Telephony ApplicationServer (TAS)
• Routing with preference to user’s IMS terminals which support the IMSmultimedia telephony service
• Automatic routing to TAS (Telephony Application Server) of the user’s home network operator
– TAS implements supplementary services
• Specific charging model
• Mapping of additional capabilities of IMS multimedia telephony to the relating CS capabilities
EIMS -2016
Selected MMTel supplementary services
• Communication Diversion services (CDIV)
• Message Waiting Indication (MWI)
• Communication Barring (CB)
• Communication Hold (HOLD)
• Explicit Communication Transfer (ECT)
• ….
EIMS -2016
Cofiguration of supplementary services
• XCAP application– Aktywacja, deaktywacja, konfiguracja
• Web site
• Number codes, eg.– *67* - call forwarding on busy
• Definition of settings (XML document - simservs)– ETSI TS 183 023 i 3GPP TS 24.623
– AUID (Application Unique ID) - simservs.ngn.etsi.org
EIMS -2016
CDIV – Call Diversion
EIMS -2016
MWI subscription
EIMS -2016
NOTIFY (7)NOTIFY sip:[1080::8:800:200C:417A]:5059;comp=sigcomp SIP/2.0
Via: SIP/2.0/UDP mwi.home1.net;branch=z9hG4bK332b23.1
Max-Forwards: 70
Route: <sip:scscf1.home1.net;lr>, <sip:pcscf1.home1.net;lr>
From: <sip:[email protected]>;tag=31415
To: <sip:[email protected]>;tag=151170
Call-ID: b89rjhnedlrfjflslj40a222
CSeq: 43 NOTIFY
Subscription-State: active;expires=600000
Event: message-summary
Contact: <sip:mwi.home1.net>
Content-Type: application/simple-message-summary
Content-Length: 816
Messages-Waiting: yes
Message-Account: sip:[email protected]
Voice-Message: 4/1 (2/0)
Video-Message: 1/1 (0/0)
Fax-Message: 1/1 (0/1)
To: <[email protected]>
From: <[email protected]>
Subject: call me back!
Date: 19 Apr 2005 21:45:31 -0700
Priority: urgent
Message-ID: [email protected]
Message-Context: voice-message
…… EIMS -2016
OCB – outgoing call barring
EIMS -2016
ICB – incoming call barring
EIMS -2016
HOLD (music on hold)
EIMS -2016
ECT(blind transfer)
EIMS -2016
Beyond IMS …
3GPP: Evolution of UMTS
EIMS -2016
Evolution of 3GPP access networkstandards
EDGE EDGE+
W-CDMA HSPA HSPA+
2000
LTE LTE-Advanced
22
2010
384Kb/s 1Mb/s
384Kb/s 42Mb/s18Mb/s
100Mb/s 1000Mb/s
EIMS -2016
From WCDMA and HSPA to LTE
EIMS -2016
WCDMAUMTS
HSDPA HSUPA
HSPA+ LTE
Max. Downlinkspeed
384 kbit/s 14 Mbit/s 28 Mbit/s 100 Mbit/s
Max. Uplink speed 128 kbit/s 5,7 Mbit/s 11 Mbit/s 50 Mbit/s
Latency RTT ~150 ms ~100 ms ~50 ms ~10 ms
Access technology CDMA CDMA CDMA OFDMA / SC-FDMA
UMTS release Rel.99/4 Rel. 5/6 Rel.7 Rel.8
Initial roll out 2003/4 2005/6 HSDPA2007/8 HSUPA
2008/9 2009/10
UMTS Evolution
• Radio Interfaces– Higher Data Throughput– Lower Latency– More Spectrum Flexibility– Improved CAPEX and OPEX
• IP Core Network– Support of non-3GPP Accesses– Packet Only Support– Improved Security– Greater Device Diversity
• Service Layer– More IMS Applications (MBMS, PSS, mobile TV now IMS enabled)– Greater session continuity
24
EIMS -2016
3GPP UMTS R8 delivers
• Significantly increased data throughput– Downlink target 3-4 times greater than HSDPA Release 6– Uplink target 2-3 times greater than HSUPA Release 6
• Increased cell edge bit rates– Downlink: 70% of the values at 5% of the Cumulative Distribution Function (CDF)– Uplink: same values at 5% of the Cumulative Distribution Function (CDF)
• Significantly reduced latency• High mobility
– Cell ranges up to 5 km; with best throughput, spectrum efficiency and mobility. – Cell ranges up to 30 km; Mobility with some degradation in throughput and
spectrum efficiency permitted. – Cell ranges up to 100 km; Supported; degradations accepted
• Reduced CAPEX and OPEX
25
EIMS -2016
What does Release 9 add to LTE?
• Continuing femtocell integration
• Added functionality, broadens LTE deployment scenarios
• Feeding back results from first LTE deployments
• Also, advancing non-LTE technologies
2626
EIMS -2016
LTE-Advanced (R10)
• Smooth transition from 3G to 4G
• LTE-Advanced to be the main feature of 3GPP UMTS Release 10
LTE LTE-Advanced
3G 4G
You are here
2727
EIMS -2016
What will LTE-Advanced deliver?
• Support for wider Bandwidth (Up to 100MHz)
• Downlink transmission scheme– Improvements to LTE by using 8x8
MIMO
– Data rates of 100Mb/s with high mobility and 1Gb/s with low mobility
28
Up link transmission scheme
• Improvements to LTE
• Data rates up to 500Mb/s
Relay functionality
• Improving cell edge coverage
• More efficient coverage in rural
areas
CoMP (coordinated multiple point
transmission and reception)• Downlink coordinated multi-point
transmission
• Uplink coordinated multi-point reception
Local IP Access (LIPA) & Enhanced
HNB to allow traffic off-load
LTE LTE-Advanced
3G 4G
You are here EIMS -2016
Evolution to a flat LTE network
EIMS -2016
EPC (Evolved Packet Core)new core network for LTE
EIMS -2016
Source: Alcatel-Lucent
All IP network for LTE
EIMS -2016
Source: Alcatel-Lucent
EPC architecture – 3GPP Release 8
EIMS -2016
SGi
PCRF
Gx
HSS
S2b
SWn
Ope rator's IP Services
(e.g. IMS, PSS etc.)
SWm
SWx
Untrusted Non - 3GPP IP
Access SWa
HPLMN
Non - 3GPP Networks
S6b
Rx
PDN Gateway
ePDG 3GPP AAA Server
Gxb
S2a
Gxa
Trusted Non - 3GPP IP
Access STa
Gxc
S5
S6a
3GPP Access
Serving Gateway
UE
SWu
EPC architecture
EIMS -2016
Evolved Packet Core (EPC)
• Multi-access core network based on theInternet Protocol (IP) as one commonpacket core network for both
– Trusted networks including• 3GPP Access (LTE-E-UTRAN, UMTS-UTRAN, GPRS-
GERAN)• Non 3GPP Access (WIMAX, CDMA2000/HRPD)
– Untrusted networks including• Non-3GPP Access (WLAN)
• EPC provides connection to IP service domains
– IMS– Internet (or others, e.g. P2P etc.)
• Important EPC functions include:– NAS and security (AAA)– mobility and connectivity management– policy QoS control and charging (PCC)
EIMS -2016
IMS Internet
3GPPaccess
non-3GPP access
EPC
Trusted Trusted/ untrusted
Decreasing area of operator’s controlAPIs for IMS and EPC
• All IP networks as a path for OTT (Over the Top) applications
• Service gateway – open APIs: RCS , IMS, EPC
EIMS -2016
IMS – Appendix
VCC – Voice Call Continuity
VCC concept
• Maintaining voice calls continuity during transition betweenPS and CS modes
• Autonomous and seamless transition of each terminal
• VCC always implemented in the home network of the served user
• „Anchoring”:– splitting the call into two call legs, and introducing a fixed point in the
network where the two legs are anchored. This allows to hand one leg from one domain to the other without creating interferences with the remaining leg
• 3GPP TS 23.206 and 24.206
EIMS -2016
Idea of VCC
EIMS -2016
Example of signaling and media path with VCC-enabled terminals
EIMS -2016
Architecture of VCC
EIMS -2016
Architecture of VCC
EIMS -2016
EIMS
Project is co-financed by European Union within European Social FundEIMS -2016
Top Related