GPRSUMTS

1
GPRS/UMTS

• IAB Workshop
• February 29 - March 2, 2000
• Jonne Soininen
• Nokia

2
Outline

• Introduction to 3GPP
• GPRS/UMTS Architecture
• GPRS/UMTS Introduction
• GPRS Architecture
• UMTS Packet Architecture
• GPRS/UMTS Protocols
• Combined GSM and M-IP mobility handling in UMTS
  IP CN
• Introduction
• Step 1
• Step 2
• Step 3
• Overview to UMTS Release 2000 All-IP Option

3
Introduction to 3GPP(1/5)

• Participation
• Organizational Partners
• ARIB
• CWTS
• ETSI
• T1
• TTA
• TTC
• Market Representation Partners
• Global Mobile Suppliers Association - GSA
• GSM Association
• UMTS Forum
• Universal Wireless Communications Consortium
  (UWCC)
• IPv6 Forum
• Individual Members
• Companies
• Observers, Guests

4
Introduction to 3GPP(2/5)
5
Introduction to 3GPP(3/5)

• TSG CN (Core Network)
• WG1 (MM/CC/SM) (Iu)
• WG2 (MAP/GTP/CAMEL)
• WG3 (Interworking with external networks)
• TSG RAN
• WG1 (Radio Layer 1)
• WG2 (Radio Layer 2 and Radio Layer 3 RR)
• WG3 (Iub, Iur, Iu, UTRAN OM requirements)
• WG4 (R. performance, protocol aspects)
• AHG1 (Ad-hoc group on ITU (internal)
  co-ordination)
• TSG SA
• WG1 (Services)
• WG2 (Architecture)
• WG3 (Security)
• WG4 (Codec)
• WG5 (Telecom Management)

6
Introduction to 3GPP(4/5)

• TSG T
• WG1 (Mobile Terminal Conformance testing)
• WG2 (Terminal Services Capabilities)
• WG3 (USIM)

7
Introduction to 3GPP(5/5)

• Technical Work Done in WGs
• Meetings
• As Necessary
• Decision through Consensus or Voting
• Most of the Work Done in Meetings
• Deliverables
• Technical Reports/Technical Specifications
• Approval by Consensus or Vote
• Change Control When Sufficiently Stable
• Inter-WG Coordination
• In TSGs
• Information Exchange through Liaison Statements
• Standards
• Releases

8
GPRS/UMTS Architecture
9
GPRS/UMTS Release 99 Architecture
10
GSM Architecture / GSM Radio
BTS
Packet
BSC
network
Um
PSTN
A
MSC
SMS-GMSC
HLR/AuC
Gb
Gr
Gs
Gd
Gr
Gd
Serving GPRS
Packet
Gs
Support Node
SS7
network
Server
Network
Gn
(SGSN)
EIR
GPRS
Border
INFRASTRUCTURE
MAP-F
Gateway (BG)
Packet
Gc
Inter-PLMN
Router
network
Local
Backbone
Firewall
Gp
area
network
Data
network
Packet
Firewall
network
network
Gn
(Internet)
Gi.IP
Gateway GPRS
Support Node
(GGSN)
11
UMTS Architecture / WCDMA
Node B
Packet
RNC
network
Uu
PSTN
Iu
MSC
SMS-GMSC
HLR/AuC
Iu
Gr
Gs
Gd
Gr
Gd
Serving GPRS
Packet
Gs
Support Node
SS7
network
Server
Network
Gn
(SGSN)
EIR
GPRS
Border
INFRASTRUCTURE
MAP-F
Gateway (BG)
Packet
Gc
Inter-PLMN
Router
network
Local
Backbone
Firewall
Gp
area
network
Data
network
Packet
Firewall
network
network
Gn
(Internet)
Gi.IP
Gateway GPRS
Support Node
(GGSN)
12
The R99 Architecture
A
Node B
Packet
RNC
BTS
BSC
network
PSTN
Iu
Um
MSC
SMS-GMSC
Gb
HLR/AuC
Iu
Gr
Gs
Uu
Gd
Gr
Gd
Serving GPRS
Packet
Corporate 1
Gs
Support Node
SS7
network
Server
Network
Gn
(SGSN)
EIR
GPRS
INFRASTRUCTURE
MAP-F
Intra-PLMN
Gc
backbone
Router
network
Local
(IP based)
Firewall
area
Border
Data
network
Packet
Gateway (BG)
network
network
Gn
(Internet)
Gi.IP
Corporate 2
Gateway GPRS
Server
Support Node
(GGSN)
Firewall
Gp
Packet
Router
Inter-PLMN
Local
network
Backbone
area
network
network
13
Entities

• The Serving GPRS Support Node (SGSN)
• Mobility Management
• Authentication
• Gathers Charging Information
• Gateway GPRS Support Node (GGSN)
• Gateway between UMTS Core Network and external
  networks
• Address allocation for MS
• Gathers Charging Information
• Filtering
• Base Station Subsystem (BSS) / Radio Network
  Subsystem (RNS)
• BSS
• BSC
• BTS
• RNS
• RNC
• Node-B

14
PDP Context

• Packet Data Protocol (PDP) Context
• Session
• Logical Tunnel between MS and GGSN
• Anchored GGSN for Session
• Multiple PDP Contexts
• Per Mobile
• Per PDP Address
• PDP Context Activities
• Activation
• Modification
• Deactivation

15
R99 Interfaces and ProtocolsRouting Example
16
GPRS Network from the Internet
17
R99 Interfaces and ProtocolsGSM User Plane
Application
IP, etc.
IP, etc.
Relay
GTP
-U
SNDCP
SNDCP
GTP
-U
LLC
LLC
UDP
UDP
Relay
RLC
BSSGP
RLC
BSSGP
IP
IP
MAC
MAC
Network
L2
L2
Network
Service
Service
GSM RF
L1bis
GSM RF
L1bis
L1
L1
Um
Gb
Gn
Gi
MS
BSS
SGSN
GGSN
18
R99 Interfaces and ProtocolsUMTS User Plane
19
Mobile IP in UMTS3GPP TSG-SA WG2 Mobile IP Ad Hoc
20
Mobile IP in UMTSA Staged Approach

• Step 1 Offering Mobile IP service
• UMTS Release 99
• Step 2 Intermediate GPRS-Mobile IP system
• Step 3 Using Mobile IP for Intra System Mobility

21
Mobile IP in UMTSStep 1
UTRAN
HA
Gp
SGSN
RNS
IP network
CN
GGSN
FA
SGSN
BG
Iur
HA
GGSN
MAP
HA
RNS
PLMN
backbone
Internet
filter
R
GGSN
SGSN
FA
RNS
FA
Iu
UTRAN
In R99
BG
Border Gateway
R
Router
HA
Home Agent
FA
Foreign Agent
22
Mobile IP in UMTSStep 1 (Cont.)

• Changes
• FA functions at GGSN
• Mobile IP in the mobile if needed
• Does not change
• GSM MAP, VLR and HLR
• Network architecture
• No changes to the MS

In R99
Mobile IP as a Service
23
Mobile IP in UMTS Step2
UTRAN
Gp
HA
RNS
SGSN
BG
GGSN
FA
IP network
SGSN
Iur
HA
GGSN
R
MAP
FA
HA
Gi
IP
RNS
PLMN backb.
Internet
filter
R
R
SGSN
RNS
R
GGSN
FA
Iu
UTRAN
BG
Border Gateway
R
Router
HA
Home Agent
FA
Foreign Agent
24
Mobile IP in UMTSStep 2 (cont.)

• Changes to Step 1
• GGSN/FA can be changed during a session if more
  suitable available
• Applicability
• Maybe in Release 2000

Mobile IP GTP Interworking
25
Mobile IP in UMTSStep 3
26
Mobile IP in UMTSStep 3 (the reality)
27
Mobile IP in UMTSStep 3 (Cont.)

• Changed from Step 1 Step 2
• GTP only on control plane (almost)
• No SGSN GGSN -gt IGSN
• Mobile IP based Macro Mobility Management
• MS has to be changed to support Mobile IP
• Problems
• Interworking with pre-Step 3 networks
• Support for non-M-IP mobiles
• etc.
• Applicability
• Not defined

More Mobile IP Integration
28
Release 2000 All-IP Architecture
29
Release 2000 Architecture

• Includes All-IP Architecture Option
• GPRS as basis
• Includes GPRS Core Network
• Home Subscriber Server (HSS) instead of HLR
• New Entities - Voice over IP infrastructure
• Call State Control Function (CSCF)
• Media Gateway Control Function (MGCF)
• Media Gateway Function (MGW)
• etc.
• New Interfaces
• New Protocols

30
R00 All-IP Reference Architecture
31
All-IP System Level Architecture
Application servers
Service capability servers
SCP
HSS
OSA
CAP WIN
Gr MAP
Iu-PS
SGSN
PSTN
GGSN
3G RAN
IPv6 All-IP Core
ISUP
RAS
Legacy Cellular
MAP IS-41
FW
SIP
H.248
Internet
CSCF Call State Control Function MRF Multimedia
Resource Function HSS Home Subscriber
Server RAS Remote Access Server (DSLAM, head
end) MGCF Media Gateway Control Function RSGW
Roaming Signaling Gateway MGW Media
Gateway TSGW Transport Signaling Gate
32
R00 All-IP Reference Architecture
Service Layer
OSA, VHE, etc.
SCP
Application Layer
CSCF
RSGW
CSCF
MGCF
HSS
MRF
TSGW
GGSN
MGW
SGSN
Transport Layer
33
R00 New Protocols (?)

• Protocol between CSCF and Mobile or IP Phone
• H.323 or SIP
• CSCF-MRF Mr
• H.248/Megaco
• CSCF-MGW Mc
• H.248/Megaco
• CSCF-HSSCx
• IP based Interface
• CSCF-CSCF Mw
• Bear Independent Control Protocol (BICC) or SIP?
• CSCF-Legacy Mobile Network Ms
• IP based signaling - The same as Mw
• CSCF-Applications/Services
• Difference Camel over IP (Sigtran)
• Real-time IP transport
• RTP/UDP/IP

34
Thank You!

• Jonne Soininen
• Jonne.Soininen_at_Nokia.Com