ITU-T / ATIS Workshop
“Next Generation Technology and Standardization”
Las Vegas, 19-20 March 2006
Resource and Admission Control
and IMS
Keith Mainwaring
Cisco Systems
ITU-T
ETSI NGN Architecture
Applications
Based on
3GPP IMS
IP Connectivity
Access Network
And related functionality
User
Profiles
Other Multimedia
Components …
Streaming Services
(RTSP based)
IP Multimedia
Component (Core IMS)
(SIP based)
Legacy
Terminals
Customer
Networks
GW
Network Attachment
Functionality
NASS
Access Transport
Network
Resource and Admission
Control Functionality
RACS
Core transport
Network
NGN
Terminals
3GPP IP-CAN
3GPP Terminals
ITU-T
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
2
Other Networks
PSTN / ISDN Emulation
(SIP-I based)
ETSI TISPAN NGN IMS Overview
Rf/Ro
Ut
Charging
Funct ions
AS
Sh
Dh
ISC/Ma
UPSF
Dx
Cx
Iw
Rf/Ro
SLF
Ib
Network
Attachment
Subsystem
Mw
Mx
I/S-CSCF
« Core IMS »
Mi
BGCF
Mr
IBCF
Mk
Mw
Gq'
Mj
P-CSCF
Mx
Mg
MRFC
MGCF
Ie
SGF
Mp
Mn
Resource and Admission Control Subsystem
MRFP
UE
ITU-T
PSTN/ISDN
Gq'
Gm
Ic
Mx
T-MGF
I-BGF
IP Transfer (Access and Core)
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
3
Other IP Networks
e2
IWF
NGN Architecture Overview
Applications
ANI
Application Support Functions & Service Support Functions
Management Functions
Service User
Profiles
Service Control
Functions
Service stratum
Transport User
Profiles
Network
Attachment
Control Functions
Resource and
Admission
Control Functions
Transport Control Functions
End-User
Functions
Other
Networks
Transport Functions
UNI
NNI
Transport stratum
Control
Media
Management
Note: UNI/NNI/ANI are not meant to represent any specific interfaces.
(This type of note is written in TR-FRA word file.)
ITU-T
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
4
ITU-T NGN Transport and Service Configuration
Applications
Service Stratum
Application Support
Functions and
Service Support Functions
Application
Functions
S. User
Profile
Functions
Other Multimedia Service
Components …
Service
Control
Functions
Streaming Service
Component
Other Networks
PSTN / ISDN Emulation
Service Component
IP Multimedia
Component
IP Multimedia
&PSTN/ISDN
Simulation
Service Component
Legacy
Terminals
Legacy
Terminals
Customer
Networks
NGN
Terminals
End-User
Functions
GW
GW
T.User
User
Profile
Profile
Functions
Functions
Network
Attachment
Network
Access
Control Functions
Attachment
Functions
(NACF)
NAAF
Access
Network
Access Transport
Functions
Functions
Resource and Admission
Control Functions
(RACF)
Edge
Functions
Core
Core Transport
transport
Functions
Functions
Transport Stratum
* Note: Gateway (GW) may exist in either Transport Stratum
or End-User Functions.
ITU-T
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
5
ANI
Application
Application Support Functions & Service Support Functions
(may include own Authentication, Authorization and Accounting)
S-5: S. User
Profile FE
S-14: Media Resource
Broker FE
S-4: Subscription
Locator FE
S-10: Breakout
Gateway Control FE
S-9: Media GW
Control FE
T-13:
T. Location
management
FE
T-16 Core Transport
Resource Control FE
T-15: Access Transport
Resource Control FE
T-8:
Media
Resource
Processing
FE
Legacy
Terminal
T-4: Access
Relay FE
NGN
Terminal
Legacy
Terminal
T-1: Access
Media
Gateway
FE
T-3: Edge
Node FE
T-5:
Access
Border
Gateway
FE
Access Packet Transport Functions
T-9:
Signalling
Gateway
FE
T-6:
Interconnection
Border
Gateway FE
T-7:
Trunk
Media
Gateway
FE
Core Packet Transport Functions
Scope of NGN
ITU-T
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
6
Core Transport
RGW
T-2: Access
Node FE
other IP MM
Network
(e.g. IMS)
T-14: Policy Decision FE
T-10:
T. Network Access Control FE
Customer
Network
Other NGN
RACF
T-11:
T. Authentication
&Authorization
FE
NGN
S-7: Interconnection
Border Gateway
Control FE
S-13: Media Resource
Control FE
T-12: T. User
Profile FE
End-User UNI
Function
S-3: Interrogating Call
Session Control FE
S-1: Serving Call Session Control FE
S-8: Access GW
Control FE
NACF
S-12: Network Signaling
Interworking FE
S-15:Multimedia
Service FE
S-2: Proxy Call Session
Control FE
S-11: User Signaling
Interworking FE
S-6: S. Authentication
& Authorization FE
Service Control
Management functions
Applications
Internet
PSTN/ISDN
Generic Resource & Admission Control Architecture in NGN
Service Control Functions
Service Stratum
Rs
Transport Stratum
RACF
Ri
PD-FE
Ru
Rp
Other NGNs
Network Attachment
Control Functions
Rd
Rt
TRC-FE
Rn
Functional Entities
PD-FE: Policy Decision
PE-FE: Policy Enforcement
TRC-FE: Transport Resource Control
TE-FE: Transport Enforcement
:
ITU-T
Rc
Rw
Transport Functions
TE-FE
Interconnection
Functions
PE-FE
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
7
Information Flow for Policy Push Scenario
Service Control Functions
(2)
RACF
(1)
(3)
CPE
ITU-T
Transport Functions
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
8
Information Flow for Policy Pull Scenario
Service Control Functions
(3)
(2)
RACF
(1)
(5)
(6)
CPE
ITU-T
(4)
Transport Functions
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
9
Possible point of control scenarios - 1
Service Control Functions
Ru
Rw
BGF
CPN
ITU-T
PEF
SCF
SCF
Rs
Rs
Resource and Admission Control Functions
Transport Stratum
Network
Access
Attachment
Functions
SCF
SCF
Service Stratum
PDF
PDF
Ri
Rt
Rp
Rt
TRCF
TRCF
TRCF
Rc
Rw
PEF
Access
Transport
Rw
Rc
Rc
Rt
TRCF
Rc
PDF
Rw
PEF
PEF
Ri
PDF
Rt
TRCF
Rc
Rw
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
Rw
PEF
PEF
Core Transport
Network
Access
Attachment
Functions
Ru
Access
Transport
10
BGF
CPN
Possible point of control scenarios - 2
Service Control Functions
SCF
SCF
Service Stratum
SCF
SCPF
Rs’
Rs
Resource and Admission Control Functions
Ri
PDF
PDF
PDF
PDF
Ru Rt
Rt
Rt
Ri
Ri
Rp
Rt
A-TRCF
TRCF TRCF TRCF
TRCF
Transport Stratum
Network
Access
Attachment
Functions
Rw
BGF
CPN
ITU-T
PEF
Rc
Rw
PEF
Access
Transport
Rw
Rc
Rc
Rc
Rw Rw
PEF
PEF
Core Transport
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
Rc
PEF
Ru
Rw
PEF
Access
Transport
11
Network
Access
Attachment
Functions
BGF
CPN
Back Up Slides
ITU-T
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
12
Resource & Admission Control Functions
o Covers procedures for the control of QoS (including
resource reservation, admission control and gate
control) , control of NAPT and Firewall traversal.
o Admission control involves checking authorisation
based on user profiles, SLAs, operator specific policy
rules, and resource availability within access and core
transport.
o Within the NGN architecture, the RACF acts as the
arbitrator for resource negotiation and allocation
between Application Functions and Transport
Functions.
o Similar to ETSI but wider scope than TISPAN Release 1
(e.g. including core network control and inter-domain
PDF-PDF communication).
ITU-T
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
13
Network Attachment Control Functions
o Dynamic provision of IP address and other
o
o
o
o
user equipment configuration parameters.
Authentication of user access network, prior
or during the IP address allocation
procedure.
Authorisation of user access network, based
on user profiles (e.g. access transport
subscription).
Access network configuration, based on user
profiles.
Location management.
ITU-T
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
14
Functional Entity Capabilities
Policy Decision FE
o
IP Packet Marking Control
o
Gate Control
o
Rate limiting Control
o
NAPT Control
o
Firewall Working Mode Selection
Transport Resource Control FE
o
Resource status monitoring and network information collection
o
Resource based admission control
o
Transport dependent policy control
Policy Enforcement FE
o
Opening and closing gate: enabling or disabling packet filtering for a IP media flow
•
Rate limiting and bandwidth allocation
•
Traffic classification and marking
•
Traffic policing and shaping
•
Mapping of layer 3 QoS information onto link-layer QoS information (e.g. setting 802.1p priority
values)
•
Network address and port translation
•
Media Relay (i.e. address latching) for NAT Traversal
•
Collecting and reporting resource Usage information (e.g. start-time, end-time, octets of sent data)
•
Packet filtering based firewall: inspecting and dropping packets based on security policy rules
[Transport Enforcement FE
•
enforces the transport policy rules instructed by the TRC-FE at the aggregate transport level (e.g.
VLAN, VPN and MPLS) ]
ITU-T
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
15
Rw interface – Resource Request
o
o
o
Application Identifier
Session Identifier
Global IP Address Information (optional, see note
1)
•
•
o
o
o
o
o
o
Client Name
Request Class
Reservation Holding Time
Resource Control Session Information (Optional)
Dynamic firewall working mode (Optional)
Charging correlation information (Optional)
Media Profile
•
•
•
•
•
•
Unique IP address
Address Realm
Transport Subscriber Identifier (optional, see
note 1)
Resource Request Client Information
•
•
o
o
o
o
o
o
o
o
o
o
o
o
o
- Flow direction
- Flow Number
- Flow Status
- Protocol Version
- IP Addresses
- Ports
- Protocol Number
- Bandwidth
- Gate Status
- Network QoS handling class (Optional)
Resource Reservation Mode
Bearer Event Notification Information (Optional)
•
•
•
•
o
Service Information Indicator
Bearer Loss Indicator
Bearer Recovery Indicator
Bearer Release Indicator
NAPT Control and NAT Traversal (Conditional)
•
ITU-T
Media Number
Type of Service
Class of Service (Optional)
Media Priority (Optional)
Path Selection Information (Optional)
Media Flow Description
Address Binding Information Request
ITU-T / ATIS Workshop “Next Generation Technology and
Standardization“
Las Vegas, 19-20 March 2006
16