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1Tequila WS, Amsterdam, 25-26 January 2001
Inter-Operator Interfaces for End-to-End IP QoS
EQUIPInter-Operator Interfaces for End-to-End IP QoS
István Cselényi, Niklas Borg ~ Telia Research AB, SwedenPéter Haraszti ~ eircom, Ireland
Hamid Gharib ~ British Telecom (BTexaCT), UK Petra Schmid ~ Telekom Austria, Austria
2
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
EQUIP - Eurescom P1008Participants• BT, eircom, Telefónica, Telekom Austria, Telia
Timing• February 2000 - March 2001
Scope• technical and business models• metrics and measurements• interfaces
3
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Project Objectives
• To produce specifications of the technical and business models, processes and interfaces needed to support automated inter-domain IP QoS management
• To capture requirements and possibilities for service performance and traffic measurements
4
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Project Results
1. State of the art study ~ project report, Q2 ‘00
2. Management scenarios and requirements ~ project report, Q3 ‘00
3. Measurement metrics and methodologies ~ technical information, Q4 ‘00
4. Interface and process specifications ~ technical specification, Q1 ‘01
Just an appetiser...
5
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Background• Interconnected IP network operators trading
managed IP QoS, end-to-end• Bi-lateral Service Level Agreements (SLA)• QoS implemented in each operator’s domain
– IETF IntServ, DiffServ, MPLS or combination(s)
• IP QoS scenarios– basic IP QoS cross-connection, – VPN and – VoIP
6
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Roles and InterfacesTrading Roles
– seller– buyer
Responsibilities– IP Network Domain– Service Provider– Service Customer– Service Customer’s
Client
Interaction– Logical relationship between roles– Physical interfaces, protocols
Trade the components of IP QoS services just as in e-commerce
7
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Service Customer
Ser
vice
Cus
tom
er C
lien
tS
ervi
ce C
usto
mer
Cli
ent
BB/OSSBB/OSS
Service ProviderService Provider
IPND A
BB/OSSBB/OSS
IPND T
BB/OSSBB/OSS
IPND Z
Ser
vice
Cus
tom
erS
ervi
ce C
usto
mer
Logical interface
Multi-Operator Trading Model
Service Customer ClientIP Network Domain
Service Provider
Physicalinterface
Service Customer
8
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Management Interconnect Models (1)
Access (ingress) Access (egress)TransitServicecustomer
Business, Service& Network
ManagementFunctions
Business, Service& Network
ManagementFunctions
Business, Service& Network
ManagementFunctions
SLASLA
Cascade
Servicecustomer
client
Only provider – provider SLAs are shown.
9
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Management Interconnect Models (2)
Access (ingress) Access (egress)TransitServicecustomer
Servicecustomer
client
Business, Service& Network
ManagementFunctions
Business, Service& Network
ManagementFunctions
Business, Service& Network
ManagementFunctions
SLASLA
Star
Only provider – provider SLAs are shown.
10
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Management Interconnect Models (3)
Access (ingress) Access (egress)TransitServicecustomer
Servicecustomer
client
Hub
NetworkManagement
FunctionsNetwork
ManagementFunctions
NetworkManagement
Functions
SLASLASLA
‘I-operator’Customer
servicemanagement
functions
Only provider – provider SLAs are shown.
11
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Interface Points (1)• Business perspective
business relationship between seller/buyer
– service management
• Network perspectivephysical interfaces between systems
– configuration
– performance management
• Plane-wise– control / management / user planes
12
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
IPND T
BB/OSSBB/OSS
ManagementPlane
BB/OSS
Access (ingress)
IPND A
Access (egress)Transit
Router Network Ctrl. IF
Protocol transfer
•IP Packet forwarding
•Business Management•Service Management•Network Management•Network Element- Management B B
S
S
S
S
S
S
S
Router Network Ctrl. IF
Router Network Ctrl. IF
Service Provider
•Routing•Signaling•Shaping•Marking•Policing•CAC•Metering
ControlPlane
UserPlane IPND T
Ser
vice
cus
tom
er
Ser
vice
cus
tom
er c
lien
t
B B
Interface Points (2)
B
S B
13
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Service Provision Processes
• identification
• advertisement
• (re)negotiation
• activation/configuration
• maintenance/monitoring/reporting
• deactivation
14
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Buyer/(Customer)
(B)
Seller/(Provider)
(S)
Traffic Conditioning Specification
Service Description
Traffic Forecast
Basic Trading Model
1. Service Description (SD)• Service Name,• Service Performance Parameters (edge-
to- edge delay, jitter, loss),• Pipe | Funnel | Hose info propagation
model,• Provisioning (static, by RSVP, by BB, by
both),• Service Code Mark(s) (DSCP(s)),
• Action On Non-Conforming Traffic (drop, shape, remark)
2. Traffic Conditioning Specification (TCS)
• SLS Reference• SD Reference,• Traffic Descriptor (source/ dest.)• Traffic Profile (rate, burst size)• Scope (ingress, egress)
3. Traffic Forecast (TF)• TCS Reference• Projected Increase/ Decrease• Time
15
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Information Propagation Models
Pipe
Funnel
Hose
Ser
vice
cust
omer
Ser
vice
cu
stom
ercl
ient
(*, Dest) (*, Dest)
Access (egress)Access (ingress) TransitS
ervi
cecu
stom
er
Ser
vice
cu
stom
ercl
ient
(Src, Dest) (Src, Dest)
Ser
vice
cust
omer
Ser
vice
cu
stom
ercl
ient
(*,*) (*,*)
Just a component of the SLA – not a management interconnect model!
16
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Trading Example ~ IP QoS Cross-Connection ~• Similar to a BE transit service, but with defined QoS• End-to-end QoS• Service Customer can be:
• DiffServ and/or IntServ aware • neither DiffServ nor IntServ aware
IntServIntServ DiffServ
BR
CR
CR
ERER
CR
CR
BR BR
CR
CR
BR
Ser
vice
cust
omer
Ser
vice
cu
stom
ercl
ient
17
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Service Performance Measurement
• Scenarios
• Measurement Points
• Metrics and Events
• Measurement Methodologies
• Reporting
18
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Ser
vice
Cus
tom
er C
lien
tS
ervi
ce C
usto
mer
Cli
ent
Business Perspective
BB/OSSIPND ABB/OSSIPND A
SellerService Provider
SellerService Provider
IPND A
BB/OSSIPND TBB/OSSIPND T
IPND T
BB/OSSIPND ZBB/OSSIPND Z
IPND Z
Bu
yer
Ser
vice
Cus
tom
erB
uye
rS
ervi
ce C
usto
mer
SLA
End-to-End Scenario (1)
19
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
IPND TRouter
Network
IPND ZRouter
Network
IPND ARouter
Network
1
End-to-end Service Performance
Network Perspective
Ser
vice
Cus
tom
er
Ser
vice
Cus
tom
er C
lien
t
Traffic Profile
23 4 5 6
End-to-End Scenario (2)
20
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Business Perspective
SellerService
Provider T
SellerService
Provider T
BuyerService
Provider A
BuyerService
Provider A
SD
TCS
TF
ServiceProvider Z
ServiceProvider Z
Ser
vice
Cus
tom
er C
lien
tS
ervi
ce C
usto
mer
Cli
ent
BB/OSSIPND ABB/OSSIPND A
IPND A
BB/OSSIPND TBB/OSSIPND T
IPND T
BB/OSSIPND ZBB/OSSIPND Z
IPND Z
Ser
vice
Cus
tom
erS
ervi
ce C
usto
mer
Transit Scenario (1)
21
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
IPND TRouter
Network
IPND ZRouter
Network
IPND ARouter
Network
1
Transit Service Performance
Network Perspective
Ser
vice
Cus
tom
er
Ser
vice
Cus
tom
er C
lien
t
Traffic Profile
2 3 4 5 6
Transit Scenario (2)
22
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Access Network
IPND A
Serv
ice
Cus
tom
er (
A-e
nd)
IPND ABB / OSS
CPE LADP LES CACBSS ER BR
CR
CR
MP1MP2 MP3 MP4 MP5 MP6
MP
10
MP7
MP8
MP9
ER - edge router LES - local exchange switch CPE - customer premises equipmentBR - border router MP* - Measurement Point CAC - connection admission controlCR - core router BB - Bandwidth Broker BSS - broadband service selection router
OSS - Operation Support System LADP - local access distribution point
Measurement Points
23
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Provider – Service Performance Metrics• availability + throughput• delay + jitter• loss
Metrics and Events
Customer – Traffic Profile Metrics• peak rate• maximum burst size• token bucket parameters
IPND TRouter
Network
IPND ZRouter
Network
IPND ARouter
Network
1
End-to-end Service Performance
Ser
vice
Cus
tom
er (
A-e
nd)
Ser
vice
Cus
tom
er C
lien
t (Z
-end
)
Traffic Profile
23 4 5 6
24
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Summary• Goal
– automated SLS management system
• Delivered results– State of the art study – Management scenarios and requirements– Measurement metrics and methodologies
• Current work– Specify an inter-domain QoS management interface
25
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
Future WorkEURESCOM P1103• The goal is to validate, extend and enhance the Inter-
operator IP QoS provisioning framework of P1008 from both technical and business perspectives
• Two case studies– compatibility with PSTN telephony services (e.g., IN service,
Value Added services, control protocol aspects)
– UMTS – IP QoS interoperability
• Identifying accounting and pricing requirements and cost principles for this service (e.g., Support QoS rebates, etc);
26
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
InformationProject members here at the WS:István Cselényi ([email protected])
Niklas Borg ([email protected])Telia Research AB, Sweden
Péter Haraszti ([email protected])eircom, Ireland
Hamid Gharib ([email protected])British Telecom (BTexaCT), UK
Petra Schmid ([email protected])Telekom Austria, Austria
Project homepage: http://www.eurescom.de/public/projects/P1000-series/p1008/P1008.htm
27
Inter-Operator Interfaces for End-to-End IP QoS
Tequila WS, Amsterdam, 25-26 January 2001
ThanksTelekom Austria
• Petra Schmid
• Armin Sumesgutner
British Telecom, UK
• Hamid Gharib
• Chris Hatch
• Dave Milham
Telefónica, Spain
• Vicente Cruz
• Sonia Escudero
Telia Research, Sweden
• Anders Bergsten
• Niklas Borg
• István Cselényi
eircom, Ireland
• Ludovic Fiard
• Péter Haraszti
• Andrew Kelleher
• Denis McCarthy
• Garett Thompson