Download - Session 3 Bss
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OSS & BSS
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OSS & BSS
• Operations Support Systems– Network systems, inventory, provisioning,
configuration, element management– OAM&P
• Business Support Systems– Customer management, order processing– Payments and billing– Sometimes Billing Support Systems
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OSS & BSS
• Why is OSS & BSS complicated?• Involves end to end management of services
– How do you make a service work once ordered?– Provisioning, activation, maintenance, payment?
• Has to encapsulate complete value chain• Must recognise and integrate multiple elements
from multiple vendors– Vendor independence is key business requirement– Vendor interop is essential....but difficult
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
• OSS integration is a significant and ongoing challenge– Seamless automation, management and
activation– Subject to considerable standardisation
efforts– Considerable variation
• Role of SI
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OSS & BSS
• Processes– Sequence of events
• Data– Information that is acted upon
• Applications– Components that implement processes
• Technology– How application is implemented
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OSS & BSS
• ITU-T Telecommunications Management Network (TMN) model– M.3000– Business Management Level (BML)– Service Management Level (SML)– Network Management Level (NML)– Element Management Level (EML)
• ISO FCAPS model– Fault, Configuration, Accounting, Performance, Security
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OSS & BSS• Different protocols act at different levels
– E.g. SNMP at EML / NML level• I.e. Individual elements reporting into a network alarm system• Many proprietary interfaces• How do you consolidate these?
• Telemanagement Forum now has leading role in developing standardised model– Recommendations and frameworks incorporated into
standards• 3GPP – explicitly refer to vendor interop as key goal (3GPP
TS 32.102.810)
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OSS & BSS
• TMF provides framework, not necessarily protocol standards themselves
• NGOSS programme– Information model
• Shared Information/ Data model – SID– Process model
• Enhanced Telecom Operation Map – eTOM– Application model
• Telecom Application Map– Architecture
• Technology Neutral Architecture– Lifecycle model
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OSS & BSS
Ref: TMF
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OSS & BSS
• NGOSS is– Loosely coupled
• Resilient• Integration interfaces make no assumptions about capabilities of elements at either
end• Reduces chances that change in one will affect other
– Distributed– Component based
• Components interact through common communications vehicle– Web services, Enterprise Java Beans
• Service orchestration
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OSS & BSS
• TMF provided reference models to illustrate relationship between business processes– Evolved into picture of telco value chain
• eTOM
• Developed standards to define access to OSS capabilities– MTNM, MTOSI
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OSS & BSS
• TAM– Telecom Application Map– Considers role and functions of applications that
deliver OSS & BSS functionality– Reference framework allowing unambiguous
statements of requirements– Highlights overlap– Groups function and data into recognised
components
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OSS & BSS
Ref: Seamless OSS/BSS for IMS Services Catalyst, Project Charter, TMF
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OSS & BSS
• eTOM– A guidebook to business processes in telecoms– Describes business processes and their interaction– Defines key elements and interaction between them– Analogous to ITIL (TQM, ISO 9000)
• eTOM is specific to telecoms• See http://www.amdocs.com/amdocscom/post/doc/etom6.pdf
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OSS & BSS
Ref: eTOM Business Process Framework, TMF
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OSS & BSS
Customer facing activities
Supplier facing activities
Ref: eTOM Business Process Framework, TMF
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OSS & BSS
Ref: eTOM Business Process Framework, TMF
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OSS & BSS
• SID Shared Information/Data Model– Defines NGOSS architectures
• Common vocabulary• Set of information/data definitions• Relationships
– Object model, using UML • Unified Modelling Language
– Articulates concerns of 4 principal stakeholders• Business, System, Implementation, Deployment
– Build requirements from each in common language– 8 Domains
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OSS & BSS
Ref: Driving Service Innovation and Profitability, Adoption of TMF standards in OSS, EMC2
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REF: Nuno Silva, PT Inovacao, IMS World Forum, 2008
OSS and BSS
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OSS & BSS
• Multi Technology Network Management Team– Evolved from SSIM (Sonet/SDH Information Model)
and other technologies• E.g. ATM
– Based on CORBA, realised as ITU M.3170• Also X.780.2 / Q816.2
– Parallel activity to extend MTNM to XML interfaces• Multi Technology Operating Systems Interface, MTOSI
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OSS & BSS
• MTOSI presents single management interface– Common information model– Supports all transport technologies– Fewer interfaces to develop, integrate, deploy, etc
• Enterprise service bus connects and acts as message broker between components
• Standards will be unified with XML / Corba interface versions under mTOP
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OSS & BSS
Ref: Driving Service Innovation and Profitability, Adoption of TMF standards in OSS, EMC 2
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OSS & BSS
Ref: Integration Challenges in Triple Play Service Delivery, Yankee Group
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OSS & BSS
• OSS/J initiative from TMF– APIs for integration of BSS and OSS
• Based on NGOSS model– SIDs
• To be added to the NGOSS TAM• Java, Web Services, XML
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OSS & BSS
Ref: Statement of Direction: Amdocs CES, Customer Experience Systems (2008)
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OSS and BSS
• TM Forum Service Delivery Framework model is consistent with exposure of enablers from OMA Service Environment– OSE
• Direct connection between OSS and service enablers via service bus
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REF: Nuno Silva, PT Inovacao, IMS World Forum, 2008
OSS and BSS
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OSS & BSS
• Billing
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OSS & BSS
• Billing is fundamental to telecoms• Accounting for authorised access to
network resources• Billing resources construct records from
collection of token, pulses and CDR*s from various entities in the network
• IMS provides standardised way to approach
*Charging Data Record, sometimes known as Call Data Record
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OSS & BSS
32.240 Charging Architecture and Principles
32.250 CS-domain Charging
32.251 PS-domain Charging
32.252 WLAN
Charging
32.260 IM Subsystem
Charging
32.270 MMS
Charging
32.271 LCS
Charging
32.295 Charging Data Record (CDR)
transfer
32.296 Online Charging System (OCS) applications and
interfaces
32.299 Diameter Charging
Application
32.297 Charging Data Record (CDR) file format and
transfer
32.274 SMS
Charging
32.298 Charging Data Record
(CDR) parameter description
32.273 MBMS
Charging
32.275 MMTel
Charging
32.272 PoC
Charging
32.280 Advice of Charge
(AoC) service
Ref: 3GPP TS 32.240.830
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OSS & BSS
Ref: 3GPP TS 32.240.830
Billing Domain
ONLINE CHARGINGOFFLINE CHARGING
WLAN
MRFC
SIP AS
PCRF
AF
CDF
CS-NE
SGSN
CGF
OCSIMS-GWFS-CSCF
Service-NE
P-GWPCEF
MGCFBGCFIBCFP-CSCFI-CSCF
S-GW
Logical high-level common charging architecture. Functional requirements are the same for all domains (e.g. PS), services (e.g. MMS) and sub-systems (e.g. IMS)
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IMS Charging and Billing
• Online charging– Charging information collected in real time
alongside resource usage– Authorisation must be obtained prior to
session– Resource usage authorisation may be limited– May be renewed during usage– Prepaid solutions
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IMS Charging and Billing
REF: 3GPP TS 32.260.840
Billing Domain Billing Domain
BGCF SIP-AS
MGCF OCS OCS
S - -CSCF IMS - GWF ISC
Ro
Ro
Ro
MRCF
Figure 4.3: IMS online charging Architecture
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IMS Charging and Billing
• Offline charging– Charging information collected in real time
alongside resource usage– Charging information does not affect service– CDRs are generated and passed to Billing
Domain• Subscriber billing and inter-operator accounting
– Post payment systems
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IMS Charging and Billing
IBCF
Billing Domain
Rf
SIP AS
MGCF MRFC
MRFC MGCF
SIP AS BGCF
CDF CDF
CGF CGF
Rf
Ga
Bi
Rf
Rf Rf
Rf
Rf I-CSCF
P-CSCF Rf
S-CSCF
Figure 4.2: IMS offline charging architecture
REF: 3GPP TS 32.260.840
Ga interface = GTP
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IMS Charging and Billing
• Charging Gateway Function (CGF) :– within the Packet-Switched domain, provides a mechanism to transfer
charging information from the SGSN and GGSN nodes to the network operator‘s chosen Billing Systems
• Charging Collection Function (CCF) : – main functionalities for IMS are in principle equivalent to the Charging
Gateway Functions (CGF) that are used in the PS domain 。• Session Charging Function (SCF) :
– is responsible for Session Charging including the session control such as e.g. session termination.
• Bearer Charging Function (BCF) : – performs the Bearer Charging.
• Event Charging Function (ECF) :– performs event-based charging (content charging).
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IMS Charging and Billing
• Content Provider Charging Function (CPCF)– manages the account that is maintained for the content
provider. Upon receipt of a charging request from the AS/MRFC, the CPCF processes the request and relays it to the SCCF.
• Subscriber Content Charging Function (SCCF)– Handles content charging requests that are made when the
subscriber accesses the content. Upon such a content charging request, the SCCF may for example request the Correlation Function to check or to debit the subscriber's account. Content charging requests are received from the Content Provider Charging Function (CPCF)
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IMS Charging and Billing
• AS / MRFC determine whether to apply Offline or Online charging, or both
• Offline charging– Post payment– IMS elements report charging events via Rf interface
• Diameter– Each session has unique ICID (IMS Charging Identifier)
• IOI (Inter Operator Identified) defines originating and terminating networks
– Charging Collection Function (CCF) constructs and formats CDRs– CDR sent to billing system (BS)
• Format specified in TS 32.225.5b0• Bi interface – not specified, but FTP / IP suggested
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IMS Charging and Billing
Policy and Charging Control – Offline Charging Architecture
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IMS Charging and Billing
• Online charging– Prepayment– Real-time credit control of postpaid services
• May be applied to same session as Offline Charging– AS / MRFC report charging information via Ro
interface• Diameter
– Event Charging Function (ECF) uses charging event to support OCS
– Session Charging Function (SCF) communicates with S-CSCF via ISC SIP interface
• May terminate session on credit expiry
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Charging information
flow
ISC
SGSNSGSN CAP
Online Charging System
Home(A) + Visited(A)
Re
Rb
Ro
Ro
Re
Rc
MRFCMRFC
AS(s)AS(s)
ISC
SGSNSGSNCAP
Online Charging System
Home(B) + Visited(B)
Re
Rb
Ro
Ro
Re
Rc
Account
Correlation FunctionBearer
Charging FunctionAccount
Correlation Function Bearer
Charging Function
RatingFunction
RatingFunction
S-CSCFS-CSCF S-CSCFS-CSCF
AS(s)AS(s)
MRFCMRFC SCCF
CPCF
SCCF
CPCF
SessionCharging Function
SessionCharging Function
EventCharging Function
EventCharging Function
Policy and Charging Control – Online Charging Architecture
IMS Charging and Billing
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IMS Charging and Billing
REF: TS 32.225.5b0 Simple procedure for session establishment, MO call
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IMS Charging and Billing
REF: Intec Telecom Systems PLC: http://www.intecbilling.com/Intec/Products+Services/Products/Charging+and+Billing/Intec+IMS+Charging+Solution.htm
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Policy Servers
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Policy Servers• Policy refers to the treatment of a session with
respect to resources available and demanded• Policy server provides services to applications• Vendor / network independent• Determines whether subscriber request
should be permitted• of required needs
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Policy Servers
• Session level policies– Subscriber entitlements / content permissions– Authorisation
• Session level policies include – Security– High-availability– DRM– Content delivery
• IPTV
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Policy Servers
• Resource level policies– Network admission control– QoS– Delivery
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Policy Servers
• Primary architectures– Policy Control and Charging Rules Function
• IMS (3GPP & 3GP2)– Service Policy Decision Function (SPDF) and
Resource and Administration Control Function (RACF)
• TISPAN (3GPP from R8)– Policy Server
• Packet Cable Media (Cable Labs)
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Policy Servers
REF: Light Reading Broadband Policy Servers http://www.lightreading.com/document.asp?doc_id=86106&page_number=1
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Policy Servers
REF: Light Reading Broadband Policy Servers http://www.lightreading.com/document.asp?doc_id=86106&page_number=1
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Policy Servers
REF: Light Reading Broadband Policy Servers http://www.lightreading.com/document.asp?doc_id=86106&page_number=1
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Opportunities for Sun
• OSS has been domain of specialists– Amdocs, Iona, Intec, Crane, Telcordia,
Orga, HP• According to Light Reading, TEMs now
moving in to market– Often with OEM software partner– Alcatel-Lucent / Convergys– Cisco / Amdocs
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Opportunities for Sun
• Suggests focus on both TEMs and Tier 2 vendors may be fruitful– Attack both sides
• Increased need to deploy high-performance policy servers will drive requirements for high-performance COTS technology
• Database growth associated with subscriber complexity
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Opportunities for Sun
• Enterprise service bus layer for integration– Oracle, BEA, Iona, etc
• SOA emergence in telecoms for orchestration of web services across OSS bus
• Integration will require high-performance servers to realise connectivity issues