Transcript interconnect working group 28 january 2005

NGN INTERCONNECT WORKING GROUP
4 April 2005
Update on the TSG Project Plan and Technical Work
Paul Griffin – Network Architect, Energis
Nick Ireland – Secretary TSG, BT
Peter Willis – Data Networks Architect, BT
The information in this presentation relates to plans currently under development and subject
to consultation, and may be subject to change. Detailed implementation depends upon a
number of factors including the capabilities of suppliers and the final 21CN network design.
UK Standards Process Structure
Commercial
Ofcom
(OPF?)
NICC
John O'Riley
TSG
Simon Sporton, Vodafone
Projects
B2B
Nancy Cox, Kingston ?
ARS WG
Architecture
Transport
WG
Apps WG
Access
Signalling
QoS WG
e2eQoS
Management
WG
Management
DSL
David Davies, BT
NGN
Ian Spiers, Marconi
Requirements
Transport
Security
Fabic Control
Ian Spiers, Marconi
Henry Taylor, BT
Sig Transport
Emtel
Ray Forbes, Marconi
Eric Rogers, BT
Dave Mustill, BT
Peter Clarke, Ofcom
Location
John Medland, BT
Enhanced MNP
Scott Bailey, 3
TSG Project Plan (1)
#
Task
PreReq
Group
/Work
item
Deadline
R /A/ G
REQUIREMENTS
1
Scope requirements for the support of
PSTN/ISDN services over IP based
interconnect
-
ARS
NICC
74
End
Feb
2005
2
Identify management requirements
impacting on signalling for PSTN/ISDN
services.
ARS
NICC
72
End
Feb
2005
3
Scope requirements for Phase 2
ARS
NICC
74
End
July
2005
-
Initial
Requirements
Incorporated
into task 1
TSG Project Plan (2)
#
Task
PreReq
Group
/Work
item
Deadline
ARCHITECTURE
4
Describe a signalling architecture for IP
based interconnect, identifying services
assumed from lower layers;
1
ARS
NICC
74
Mid
March
2005
5
Describe approaches to maintaining the
network resilience across an IP based
interconnect.
4
ARS
NICC
74
Mid
March
2005
6
Produce a draft design document for the
transport architecture to be incorporated
into the NGN document set.
-
ARS
NICC
74
End
March
2005
R /A/ G
TSG Project Plan (3)
#
Task
PreReq
Group
/Work
item
Deadline
R /A/ G
ARS
NICC
73
Due
end
March
Initial
Requirements
included in
task 1.
Work
ongoing in
ETSI
SECURITY
7
Establish a set of security requirements
for NGN interconnect over an IP
interconnect for PSTN/ISDN traffic.
-
8
Identify network protective controls
(e.g. to protect against Mass Calls)
(Subset of 7)
-
9
Identify method to prevent Application
Fraud
(Subset of 7)
-
TSG Project Plan (4)
#
Task
PreReq
Group Dead- R / A / G
/Work line
item
10 Define and document the
Specification of the signalling
required to establish,
clear down, maintain and accurately
charge for calls across an IP based
interconnect, and subsequently
maintain this specification (SIP-I)
ETSI
TISPAN
7
11-15
July
1,2,4,6
App
NICC
70
End
July
2005
11 Identify the protocols needed to
support signalling and whether they
are sufficient to allow
implementation. (SCTP/UDP)
4
App
NICC
70
End
July
2005
APPLICATIONS
Initial
Requirements
included in
task 1.
Work ongoing
in ETSI
TSG Project Plan (5)
#
Task
PreReq
Group Dead- R / A / G
/Work line
item
12 Identify any open issues in the
required standards and if required,
determining solutions for input to the
appropriate international standards
body.
1,4,6,11
App
NICC
70
End
July
2005
13 If required, produce NICC
specifications and/or guidelines on
the transport and physical aspects of
IP interconnect.
1,4,6,11
App
NICC
70
End
July
2005
14 Draft Interconnect Test Specs
10
App
NICC
70
End
Aug
2005
APPLICATIONS
TSG Project Plan (6)
#
Task
PreReq
Group Dead- R / A / G
/Work line
item
15 Identify the protocols needed to
support user and IP Transport planes
and whether they are sufficient to
allow implementation
4,6
IP
NICC
71
End
EoSDH defined.
March Additional
2005 protocols
identified
from task 6
16 Identify any open issues in the
required standards and if required,
determining solutions for input to the
appropriate international standards
body.
15
IP
NICC
71
End
Ongoing,
March Ethernet OAM
2005 Frames
IP TRANSPORT
TSG Project Plan (7)
#
Task
PreReq
Group
/Work
item
Dead- R / A / G
line
17 If required, produce NICC
specifications and/or guidelines on
the transport and physical aspects of
IP interconnect.
15
IP
NICC
71
End
March
2005
18 Develop a list of operational
procedures for managing IP
interconnect for PSTN/ISDN traffic.
10
MGMT End
NICC
March
72
2006
MANAGEMENT
Key Issues
Technical areas
NICC Specifications based on existing international
standards
Current Status
• Release 1 (PSTN/ISDN) Service requirements agreed
• Release 1 IP Interconnect Architecture defined (includes
security, management, resilience aspects)
• IP Interconnect physical transport defined – Ethernet over SDH
• Release 1 IP IX Signalling to be SIP(I) – dependency on ETSI
Current key issues
• SCTP = PSTN/ISDN MTP equivalent
• Numbering, Addressing, Identifiers = tba
IP Addressing Issues
The address range 172.16.0.0/12 has been proposed
(over 1 Million addresses)
The intention is that we do not mandate whether or not any CP uses
NAT
• Signalling should be OK, i.e. 6 IP addresses per signalling “link”
(/29)
• Unknown volumes of IP addresses will be required for media
streams if NAT is not used.
Who will administer this address space?
• This will give visibility of the number and possibly location of
interconnects that each operator has. Commercially sensitive
Who will define the rules?
• Should rules and best practices be the work of the standards
bodies
NGN A
NGN B
Management
Funcs fMn
fB1
Transport
Function
Management Plane
Control Plane
Source Session
Control Func
fC3
Control Plane
Bearer Plane
Edge Session
Control Func
Edge Session
Control Func
fC1
IP Session Border
Func
fB3
fC1
Destinatn Session
Control Func
fC4
BW Mang
Func
fC2
BW Mang
Func
fC2
Signalling Border
Func
fB2
NGN
Bearer
N/W(s)
Management
Funcs fMn
iMn
iC1
iB1a
iB3
iB1b
Signalling Border
Func
fB2
IP Session Border
Func
fB3
Other IP Service
Border Func fB4
iB1c
Other IP Service
Border Func fB4
ATM Border
Func
fB5
iB2a
ATM Border
Func
fB5
TDM Border
Func
fB6
iB2b
TDM Border
Func
fB6
NGN
Bearer
N/W(s)
IP
ATM
IP
GFP
IP
IP
Ethernet VLAN
IP
GigE Physical
VCAT
SDH Physical
IP
IP
IP
Ethernet VLAN
GFP
VCAT
ATM
TDM Services
ATM Backhaul Services
PSTN/ISDN Services
Other Services on IP
Other Services on IP
PSTN/ISDN Services
ATM Backhaul Services
TDM Services