Video service assurance across hybrid transport networks
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Video service assurance across hybrid transport networks



How Dimetis is automating the management of hybrid network transports to provide realtime end-to-end traffic routing and QOS assurance for mission-critical video feeds

How Dimetis is automating the management of hybrid network transports to provide realtime end-to-end traffic routing and QOS assurance for mission-critical video feeds



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    Video service assurance across hybrid transport networks Video service assurance across hybrid transport networks Document Transcript

    • Dimetis Whitepaper for the Television Broadcast Industry (working draft, incomplete) ------------------------ “Assuring End-to-End Broadcast Video Quality over Next Generation Networks” ------------------------ ABSTRACT A tectonic paradigm shift in network transport techniques is rocking the broadcasters’ confidence in the transmission quality of mission-critical television streams. Broadcasters are unsure of when of if their media streams are receivingpriority treatment and transport service providers are themselves unable to answer these questions. Yet the implementation of hybrid, unmanaged Next Generation Networks (NGN) continues to proliferate, jeopardizing the broadcasters’ ability to guarantee delivery of broadcast-quality payloads even for their premium HDTV content. Dimetis provides a next-generation Broadcast Operation Services and Support toolsetwhich simplifies this NGN chaos in a uniform manner, restores confidence in the integrityof broadcast transports, and then lets broadcasters leverage these disruptive changes to their advantage. Adoption of Internet Protocol has reached an inflection point – based on recent MPLS / LSP advances for broadcast traffic – and its momentum will now only increase. Dimetis is showing broadcasters how its Broadcast OSS strategy can ease this inevitable migration and help them forge a robust Services Oriented Architecture (SOA) to exploit end-user demand for mobile media delivery. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 1 of 29
    • Table of ContentsI. Your Broadcast Business currently employs a hybrid of multiple transportnetworks to deliver media payloads: SERVICE ASSURANCE PROBLEMS AND EXCESSIVE COSTS WITH CURRENT LONG-HAUL SERVICE PROVIDERS MPLS IMPROVEMENTS IN IP TAGGING SCHEMES ATM-GRADE PERFORMANCE OVER IP CORE BACKBONES “BOUTIQUE” Carriers Are Mpls-Savvy MANAGING MEDIA DELIVERY QUALITY ( SLAS, QOS) OVER HYBRID NETWORKSII. Unified Control over Hybrid NGN Transports - The Key to ReEstablishingMedia Payload Assurance BRIDGING THE GAP – WHY MANAGEMENT IS THE KEY CLOSED LOOP FULFILLMENT ASSURANCE – HARNESSING FRAGMENTED NGN TECHNOLOGIES INTO A COHERENT OPERATIONAL ENVIRONMENT CURRENT HETEROGENEOUS TRANSPORT NETWORKS CANNOT BE CENTRALLY MANAGED END-TO-END Current EMS tools Current OSS tools BOSS – THE BROADCAST OPERATIONS AND SUPPORT SYSTEM MORE THAN TRANSPORT MANAGEMENT IS REQUIRED FOR END-TO-END PAYLOAD ASSURANCE MANAGEMENT SCENARIOS INTEGRATING BROADCAST CONTRIBUTION ELEMENTSIII. Managing Complex Hybrid Networks is Now Easy with Dimetis BOSSIV. BOSS is a standards-based management tool that can Grow and Adapt withYour Network Evolution – SID model, SOA, ESB etc see shahinV. You may want to migrate to a consolidated, homogeneous network strategy.BOSS provides a logical path for Migrating to Homogeneous Next GenerationNetworksVI. BOSS can Help You Migrate to a Robust Service Oriented Architecture (SOA)for Integrating Media Distribution over IPTV, Broadcast, Video-on-Demand,Webcast, & MobileCast – all with Realtime Payload Assurance st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 2 of 29
    • I.Your Broadcast Business currently employsa hybrid of multiple transport networks to deliver media payloadsThe broadcast business has always relied on the effective application of cutting-edgetechnologies. But today’s challenge of network evolution may be stressing the your ability tomanage change. Disruptive trends reshaping transport network operations may leave youfeeling adrift, so Dimetis is providing this logical overview of key industry trends that will beshaping your future operating practices. Hopefully this study will illuminate a rationalmigration path for coping with and exploiting these accelerating technological advances.As a technology-centric operation, broadcasting currently relies on a dense web of transportnetworks to carry mission-critical video, radio, and data streams. regional contribution o In-Studio Gb LANs o Editing Bay WANs o Satellite Links o Microwave Truck Remotes o Transmitter Links global distribution o realtime o file transfer on-demand, event transmission Some of these networks are owned and managed in- house, some by contract suppliers, and some by telecom service providers (carriers). The matrix at right maps the scope of this complexity facing today’s broadcaster. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 3 of 29
    • This explosion of media transports has resulted in a plethora of options which are utilized inan unmanaged way – leaving the broadcaster exposed to: Unmonitored corruption of media quality & service outages No automated Failover or Failback capabilities Excessive cost for legacy network leases Unmonitored waste of under-utilized transport capacity Excessive downtime & cost for diagnosing & repairing transport outages No Comprehensive Service Quality Assurance for mission-critical payloads No comprehensive view over transport operations, utilization, & optionsThis uncontrolled expansion of transport options is understandable, occurring over decadesas broadcasters added network functionality as needed. But now this jumble of disparatenetwork gear and protocols has created a hybrid of heterogeneous, unmanaged complexitythat can marginalize both the broadcasters’ profitability and service quality.SERVICE ASSURANCE PROBLEMSAND EXCESSIVE COSTS WITH CURRENT • Black FrameLONG-HAUL SERVICE PROVIDERS • Audio LossIn addition, the service providers you use for • I-Frame Bit Errorlong-haul distribution has also been affected by • P-Frame Bit Errorthe creep of heterogeneous transport protocols • Freeze Upinto their operations resulting in a similarunmanaged level of operations that can andoften does directly impact the quality and QoS degradation of Media Payloads has become more common and more frequentreliability of your media payloads across their with today’s next-generation networksnetworks. Service Provider networks are not homogeneous. End-to-end transmission of Media Payloads is typically transported over a mix of disparate network protocols st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 4 of 29
    • Despite having contractual Service Level Agreements (SLAs) with these carriers, their lack of (and incapability of providing) realtime Quality of Service (QoS) monitoring means they: 1) are often unaware of QoS corruption, 2) have no means of mitigating QoS degradation in realtime, and 3) you have no recourse for pro-actively assuring end-to-end QoS. Until a downstream distributor or subscriber calls to complain about corrupt sound, image quality, or file transfer – you have no awareness of the problem because you (and your carrier) have no realtime visibility into the integrity of your media payload stream end-to-end. These long-haul carriers are also struggling to integrate Next Generation IP networking into their transport mix. Unfortunately the excellent service assurance traditionally provided by ATM transports (defined in chart) is no longer the operating norm. Because today’s new IP networks offer the carrier lower equipment cost and lower operating expense, they are compelled to add IP transports into their long-haul architectures. Now the IP protocol is in an important transitionary phase – offering powerful QoS advantages for broadcast streams while suffering a lag inUNFORTUNATELY advanced service quality implementation. It’s appeal and advantage overTHE EXCELLENT ATM is that it is a “connectionless” protocol. IP traffic runs in a mixed modeSERVICE with multiple user streams competing for passageway - maximizing inherentASSURANCE utilization efficiency in the transport pipe and lowering operating costsTRADITIONALLY compared to ATM. This strategy is ideal for data traffic which has no realtime performance constraints.PROVIDED BY ATMTRANSPORTS IS But for realtime video streams, the “connection-oriented” nature of ATMNO LONGER THE means that each user’s stream was assigned a permanent portion of theOPERATING NORM transport pipe for the duration of the transmit session – thus guaranteeing 100% QoS when using ATM’s “Constant Bit Rate” (CBR) feature. However, the cost of provisioning each user’s stream or “Private Virtual Circuit” (PVC) incurs a higher OPEX penalty compared to IP. The carriers’ migration away from ATM reliability is not based on abandoning legacy ATM components, but rather by adding IP transports into portions of the backbone which they find useful. Thus their backbone is no longer ATM-homogenous and can no longer ensure end- to-end ATM QoS assurance. st 1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 5 of 29
    • MPLS IMPROVEMENTS IN IP TAGGING SCHEMES The good news is that the IP protocol is continually improving on its connectionless model, and is actually moving closer to ATM’s connection-oriented SLA approach. IP’s original SLA tiers were based only on DiffServ tagging of the data packets. However the needs for video and VoIP QoS urged the improved “MPLS” tagging schemeIP NOW HAS AS which improved traffic resiliency for media streams.GOOD A TRAFFIC One important MPLS feature has tamed a specific need of broadcasters forENGINEERING point-to-multipoint distribution. Traditionally a broadcaster will distributeCAPABILITY AS programming to a dozen regional head-ends nationwide using simultaneousATM. BUT THE satellite feeds, requiring only one upload stream to the distribution node.PROVISIONING However, this “Multi-Casting” via IP was a challenge until the Label SwitchedSKILLS AND Path “LSP” was aggressively implemented recently by Juniper and others.ADEPTNESS OF LSP moves IP from the pure connectionless model toward ATM’s connection-CARRIERS TO oriented advantage for video. Without LSP and its destination / connctionTAKE ADVANTAGE taggin, IP networks had to duplicate a separate copy of each stream to eachOF THESE distribution head-end. Thus point-to-multipoint (P2MP) distribution of aADVANCES HAS 300Mbps uncompressed HDTV signal yielded a 3 Gbps load on the IPNOT KEPT UP backbone – inefficient and error-prone. Now with LSP tagging, only one stream is carried on the backbone and its destination / connection tagging then replicates and routes duplicates only at the destination edge of the network. ATM-GRADE PERFORMANCE OVER IP CORE BACKBONES (adapted from Juniper Networks) Since video is so loss-sensitive, it requires that service providers specify point-to-point worst case latency/jitter bounds and packet loss metrics that can match those of ATM services. From a network-architecture perspective, that requires IP routers to guarantee worst case latency and jitter bounds on a per-node basis for premium traffic in the presence of background best effort data traffic. In addition, IP routers have to guarantee bandwidth for each premium application on an end-to-end basis. “Carriers dont like the idea that their "premium traffic is just floating around out there," he says. "What youre going to see in the industry is an increased drive by the IP players to deal with premium traffic without having everything fall into the best-effort hole." - Tom Nolle, president of consulting firm CIMI Corp. To ensure the deterministic delivery of video the IP network must also support rapid recovery from a failure. Reducing outage times to subsecond intervals is critical to sustain high levels of video quality and minimize error recovery dependencies. MPLS resiliency is on a par with SONET/SDH recovery times, but has the added ability to recover from an outage using local repair techniques. MPLS also can reallocate lower traffic class bandwidth resources to video in a converged core, so that an entire duplication of capacity is not held in reserve (as it is with SONET rings). This reduces the number of idle links in the network while maximizing revenue potential. Another key benefit of IP/MPLS over pure SONET/SDH transport for video distribution is the ability to grow the network rapidly and easily as site count and content capacity increase. st 1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 6 of 29
    • Core routing platforms now scale into the terabit-per-second range with wire speed and low- latency forwarding. Weighed against the disadvantages of a traditional SONET/SDH solution, IP/MPLS emerges as a compelling choice for video distribution when implementing a robust, large-scale backbone. Quality of Service: Jitter is an especially important consideration. For instance, a one- second delay in a television program is not important to the end user. However, variances in that delay will be experienced as frame freezes, asynchronous dialogue, or slight omissions from the program. The loss of even a handful of packets can result in a noticeable—and unacceptable—blip on the TV screen. The QoS abilities of legacy routers have historically been an issue in transitioning to an IP solution. Improved queuing mechanisms for guaranteed QoS have helped to resolve this issue, along with the ability to take better advantage of MPLS features such as Resource Reservation Protocol traffic engineering (RSVP-TE) and DiffServ TE. Resiliency: Expected failover for video is on the order of that provided by SONET/SDH (50 ms). This is achieved through the use of MPLS Fast Reroute (FRR). Replication - For bandwidth efficiency, it is necessary to perform an efficient replication within the network to eliminate duplicated traffic over the same link. These new MPLS schemes now mean the IP protocol inherently has as good a traffic engineering capability as ATM. But the provisioning skills andCARRIERS HAVE adeptness of carriers to take advantage of these advances has not kept up.JUST BEEN TOO Frankly carriers have just been too busy meeting the revolutionary demandBUSY MEETING THE for streaming web content, IPTV, and mobile media convergence to focus onREVOLUTIONARY the QoS needs of broadcast television customers.DEMAND FORSTREAMING WEB COSTLY “BOUTIQUE” CARRIERSCONTENT, IPTV, While today’s “common carriers” struggle to digest the impact of Next GenAND MOBILE MEDIA Networks on their core businesses, there are boutique carriers like Level3CONVERGENCE TO and MediaXstream whose core business model is to service the niche needsFOCUS ON THE QOS of QoS-dependant clients like broadcasters. They are up-to-date on the latestNEEDS OF IP advances and more importantly have customized and implementedBROADCASTERS advanced management systems which fully leverage the advantages of Next Gen Nets to their customers’ advantage. However, broadcasters must pay an arm and a leg to carry their payloads over these boutique service providers. Dimetis is in the business of showing broadcasters how they can: 1) Use common carriers at lower cost to achieve the same premium QoS results as boutique carriers for long-haul video transport 2) Achieve advanced QoS management and provisioning benefits over their own in-house networks and transports st 1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 7 of 29
    • MANAGING MEDIA DELIVERY QUALITY ( SLAS, QOS) OVER HYBRID NETWORKS So if IP/MPLS transports are now capable of ATM-grade performance, what’s the problem? Simply put, while properly provisioned and managed IP can now deliver broadcast-quality service assurance, transmission networks are: 1) not homogeneously using advanced IP/MPLS gear 2) not operated and managed with optimal IP/MPLS parameters 3) not operated with homogeneous transport protocols. Thus transport streams must survive multiple hurdles across divergent network standards, fragmented protocols, and un-coordinated carrier operating standards. Clearly there is a paradigm shift with Next Generation Networks that can benefit broadcasters. Yet you still wonder about end-to-end media delivery quality over mixed hybrid transports and networks. And, as long as you are lacking absolute metrics from realtime performance measurements, one cannot and should not be certain about media stream integrity. Dimetis is in the business of helping broadcasters leverage this paradigm shift to their advantage by: 1) consolidating and delivering realtime QoS performance metrics from any point in the contribution or distribution network using any existing monitoringAS LONG AS YOU gear from any vendor over any networkARE LACKINGABSOLUTE 2) providing automated, non service-interrupting fail-over and failbackMETRICS FROM protection for network resiliency over any mix of transport protocols orREALTIME service providersPERFORMANCE 3) guaranteeing end-to-end broadcast-quality QoS over any networkMEASUREMENTS, transport or carrierONE CANNOT ANDSHOULD NOT BE 4) supporting on-demand provisioning of any network to support broadcast quality television transmissions from event-based venuesCERTAIN ABOUTMEDIA STREAM 5) assuring point-to-multipoint distribution qualityINTEGRITY st 1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 8 of 29
    • II. Unified Control over Hybrid NGN Transports - The Key to ReEstablishing Media Payload Assurance The NGN resources that now exist are technologically capable of deliveringNGN ADVANCES payload assurance adequate for assuring broadcast-quality transmission. But the missing link is the management capability to uniformly weld theseHAS CREATED A components into a seamless and coherent operating environment. PresentFRAGMENTED Methods of Operation (PMO) for these heterogeneous resources do not provideMOSAIC OF a centralized operational environment capable of enabling centralized, uniform,HYBRID and realtime control over the QoS and SLA parameters that can guaranteeTECHNOLOGIES payload integrity.FOR WHICHTHERE IS NO BRIDGING THE GAP – WHY MANAGEMENT IS THE KEYUNIFIEDMANAGEMENT The legacy ATM transport environment gave carriers a centralized managementTOOLSET toolset with which they could assure broadcasters reliable broadcast-quality links over a homogeneous network. But the emergence of NGN advances has created a fragmented mosaic of hybrid technologies for which there is no unified management toolset nor over-arching method of coherent operation. With the rapid advance of NGN technologies, the existing management tools have simply not kept up: 1) PMO provide no end-to-end, realtime monitoring metrics readily available to provide visibility into the integrity of media payload streams 2) PMO cannot identify locations and sources of unplanned network congestion in realtime 3) PMO cannot centrally control the QoS parameters for every router, switch, satellite, encoder/decoder, and transport link that carries your broadcast stream 4) PMO do not provide realtime failover mechanisms or strategies for every router, switch, satellite, encoder/decoder, and transport link that carries your broadcast stream 5) PMO do not let the broadcasters establish transport links on-demand capable of supporting remote events. Maintaining the exorbitant cost of satellite trucks is evidence of this need. 6) PMO do not readily provide point-to-multipoint distribution What is needed for bridging this gap is a management toolset and operational methodology capable of implementing Closed Loop WELDING HYBRID Fulfillment Assurance across the entire mosaic of hybrid NGN equipment NETWORK and systems. The industry focus should now be on enhancing the ELEMENTS INTO operational capabilities that will harness new NGN systems to better A COHERENT serve the broadcasters’ needs. OPERATIONS CONSOLE FOR BROADCAST st 1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 9 of 29
    • CLOSED LOOP FULFILLMENT ASSURANCE –HARNESSING FRAGMENTED NGN TECHNOLOGIES INTO A COHERENT OPERATIONALENVIRONMENTThe sheer scope of the management challenge can seem daunting, looking at the diagrambelow. Yet the key to streamlining operations across this mosaic is found by simply tappinginto the management interfaces of every existing component and then consolidating thosedata and control parameters into a centralized, uniform management tool. This integration isprecisely what Dimetis has achieved and Section III will describe the Dimetis BOSSmanagement architecture. But prior to that explanation, a fuller understand if existingmanagement approaches and tools should be helpful for the broadcaster.HETEROGENEOUS TRANSPORT NETWORKS CANNOT BE CENTRALLY MANAGED END-TO-ENDUSING LEGACY MANAGEMENT TOOLSTwo fundamental classes of management tools exist for the carrier: 1) Stand-alone Element Management Systems (EMS) supplied by equipment vendors which provide data interfaces for the remote monitoring and control of that equipment’s operating parameters 2) Highly integrated Operations Support Systems (OSS) that serve as sophisticated database engines that carriers use to operate and manage both their network operations and their back-office business applications. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 10 of 29
    • Current EMS toolsLooking at the first method, one can easily understand why stand-alone EMS tools werenever built to integrate into a uniform, cross-platform operating system. So today’sbroadcaster is typically faced with a barrage of fragmented management screens and toolswhich cannot quickly profile and characterize the realtime condition of his transport stream,much less provide a single console for realtime system-wide control.Enter Dimetis, the proven leader in closed-loop performance assurance with a centralizedmanagement interface capable of polling and controlling every single piece of equipment inthe broadcasters’ shop. By accessing and consolidating the operational parameters ofevery component, the broadcaster gains a single integrated console for monitoring andcontrolling his network performance.Of course to achieve this cross-platform, cross-technology integration, the Dimetis platform isa hardware and software agnostic system. While it features interoperability with any existingpiece of gear or network management tools, it’s agnosticism assures seamless integrationwith any future acquisitions to future-proof the manageability of your operationalinfrastructure. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 11 of 29
    • Current OSS toolsOne might expect the large OSS tools to delivery highlyintegrated functionality – which they indeed do. But thescope of their operational advantage focuses on theback-office tasks. Originally developed as BillingSupport Systems (BSS) they have evolved intosophisticated Customer Relationship Management toolsfor minimizing churn by improving subscriber loyalty.They also integrate EMS and provisioning capabilities formonitoring and controlling network components toassure QoS for VoIP and IPTV across the access network. But with their focus on serving wireline and wireless subscribers, they have yet not tackled the management challenge of welding hybrid network elements into a coherent operations console for their broadcast clients. In short, the rapid advance in NGN options has culminated in a level of network complexity that has surged ahead of the ability of legacy toolsets to adequately manage it, resulting in a mission-critical performance gap for broadcasters.Legacy OSS cannot monitor orprovision end-to-end elements ofhybrid networksBOSS – THE BROADCAST OPERATIONS AND SUPPORT SYSTEMCorrecting the broadcasters’ performance gapusing state-of-the-art management tools andstrategies is the specific mission of Dimetis.To achieve this goal, we have developed abroadcast-centric management platform whichwe’ve named the Broadcast Operations and Support System (BOSS). Drawing on over 10years of broadcast engineering and management expertise, we’ve assembled a team ofworld-class industry experts – drawn from notables such as Telcordia, Deutsh Telecom, andADC – who have built their careers designing and implementing robust and elegantbroadcast solutions st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 12 of 29
    • MORE THAN TRANSPORT MANAGEMENT IS REQUIRED FOR END-TO-END PAYLOAD ASSURANCEAnd yet the challengeof managing complexitycontinues to expandwhen we include thecontribution elementsunique to the broad-casters’ fulfillmentchain. A faulty encoderis as likely to disruptthe video stream as anetwork router andmonitoring this node isa critical link in thebroadcasters’ end-to-end fulfillment chain.MANAGEMENT SCENARIOS INTEGRATING BROADCAST CONTRIBUTION ELEMENTSThe encoder failure scenario above is anobvious example of the value that stemsfrom having a management system basedon closed-loop fulfillment. Dozens of failurerecovery scenarios can be played outspanning the transmitter link to the remotenews truck to the satellite uplinks – all ofwhich Dimetis systems are managingseamlessly today for our top-tier broadcastclientele.But once a centralized monitoring andcontrol system that integrates studiocontribution elements is in place,significantly advanced operationalcapabilities can be further realized: 1) File transfers from video servers can be scheduled for automatic sending during off- peak hours 2) Scheduled event timers can automatically initiate camera feeds, telecine playback, etc. 3) Playout distribution can be localized with regionally-relevant titling using BOSS control of the studio titler 4) Remote control of studio switchers can initiate data crawls for pre-programmed content st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 13 of 29
    • Hopefully these brief examples characterize who the Dimetis BOSS platform can not onlyenhance the reliability of media stream transport, but can also contribute to the automation ofdaily operational chores around the studio.WHY BROADCAST OPERATIONS WOULD INVEST IN THEIR OWN NETWORK MANAGEMENTTOOLSETThe most obvious answer is that if network service providers are incapable of supportingend-to-end payload assurance, then broadcasters must shoulder that responsibilitythemselves. While Dimetis has made the installation of the BOSS platform a non service-interrupting management overlay, it also can also be implemented in a phased manner toinitially solve only those most pressing problems unique to your specific operational needs.Individual management modules of the Dimetis BOSS platform can be purchased separatelyto support a pay-as-you-grow model.Moreover, we can look at different classes of broadcasters to understand how each canbenefit:1) Many national broadcasters like Disney or CNN own and operate their own distribution networks. For these operators – who are already shouldering in-house network management – implementation of the Dimetis BOSS platform is a logical, painless, and profitable exercise for improving payload assurance and increasing efficiency of transport utilization while reducing operational costs.2) Smaller broadcast operations wanting to better manage local contribution links and their regional LANs will find the value of BOSS worth the effort to install discrete BOSS modules which will improve payload reliability while simplifying operational tasks. Seamless monitoring and control over remote trucks, transmitter links, remote editing bays and in-house payload routing has proven a valuable investment by dozens of Dimetis customers during the last decade.3) Playout centers and broadcasters wanting to automate scheduled control of contribution activities like . . .4) Content originators needing to improve file transfer reliability – say more5) Broadcasters wanting a coherent NGN upgrade path to consolidate legacy mixed transports into a simplified, homogeneous IP/MPLS network. Dimetis can help manage a planned phase-out of existing ATM service contracts, and retirement of costly microwave / satellite links with new NGN strategies and systems that will reduce operating and vendor costs while improving payload integrity.6) Broadcasters wanting to minimize costly service contract with boutique carriers can alternatively implement direct QoS control over public carrier networks. Using the Dimetis management interface to control end-to-end QoS over a common carrier’s network can eliminate dependence on boutique carriers for assurance of payload quality. However one may ask - how can a carrier give broadcasters the permission to directly provision their network gear? The answer is that – while common carriers like AT&T have not kept up with advanced QoS provisioning and management capabilities themselves – they are willing to allocate and lease a portion of their backbone to outside control. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 14 of 29
    • 7) Event-based broadcast providers who contract their on-demand transport services. Upgrading operations to use Dimetis-managed NGN networks may significantly reduce both the CAPEX and OPEX of traditional satellite remote trucks. Dimetis’ ability to support on-demand provisioning of existing metro fiber rings means that adequate spectrum can often be located adjacent to event venues.IV.Managing Complex Hybrid Networks is Now Easy with Dimetis BOSSThe Dimetis BOSS platform is a hardware and software agnostic system, enablinginteroperability with any existing piece of gear or network management tools. Thisagnosticism assures seamless integration with any future acquisitions to future-proof themanageability of your operational infrastructure.Dimetis BOSSprovides a unified digital broadcast monitoring / management system,providing payload assurance across the entire network in an organized, structured hierarchy- from points of content origination to final customer distribution: ● Multiplex and Playout Centers (DVB-T, -S, -C, ATSC and IPTV) ● Broadcast networks (contribution as well as distribution) st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 15 of 29
    • ● Terrestrial TV distribution networks, from the Head-End to the final POPs (Points of Presence), including the transmitter, the Cable RF converters or DSLAM locationsThe BOSS platform displays the wholetransmission network in an easy-to-useuser interface (GUI) where all faults andalarms are logged and collated atcentralized management locations. Alarmfiltering / correlation on defective Network visibility on a regional / country-wideequipment and/or out-of-specification level as well as site-specific detailsignal parameters can next be performed,typically color-coded on overview screens / maps to highlight the source location of aproblem. This ensures simple error recognition and fault isolation. Any operation to resolvethe fault can subsequently be executed either automatically or manually. The Big Picture View with Drill- Down Detail In the event of an error, a problem can progress through several downstream segments and trigger “cascaded” alarms in various other downstream locations. An effective Broadcast Umbrella alarm management across various types of broadcast equipment OSS monitoring system mustreliably inform the operator about the root cause of the error along with all resultantconsequential errors. Sophisticated alarm correlation techniques are therefore an importantcomponent of this type of system to assist in quick fault isolation / identification while filtering/ screening secondary effects. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 16 of 29
    • IPTV and DVB / ATSC MonitoringIn monitoring any type of complexbroadcast network, a structured designand implementation approach is anabsolute necessity in order to achieveoverall system quality and efficiency.As faults and errors occur, targetedactions (initiated either automatically ormanually upon alarm trigger) can beperformed to eliminate and / or mitigatethem.A structured and robust monitoringsystem will allow: ● all network devices to be defined and configured in a database. ● the recording of all performance information and alarms from devices / element managers, allowing a comprehensive IPTV Network Monitoring overview of network status. ● provisions for n+1 back-up / recovery switching (for both video signals as well as equipment service profiles) based on error severity as defined through the correlation engine.In the case of IPTV deployments,monitoring at the DVB / IPTV layer of thewhole distribution network from Head-endto DSLAMs is important for completesystem visibility. All Single ProgramTransport Streams (SPTS) across theentire network should be collectable andcapable of having all data thoroughlyanalyzed via strategically placed IPTVprobes and / or Transport StreamAnalyzers / Recorders (Figure 3 andFigure 4).For DVB / ATSC networks, localized Centralized DVB / IPTV Monitoring and Controlmonitoring and control of remote siteequipment reporting upward to a higherlevel monitoring authority best suites thecharacteristics of this environment. Monitoring and control can include everything fromplayout devices to tower transmitters to entry door security. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 17 of 29
    • the QOS agent in the BOSS PlatformBy its very definition, video is an unforgivingservice. For real-time, non-streamed applicationswhere retransmissions are impractical, variations inits timing and/or delivery sequence will most likelyresult in scrambled images and subscribermalcontent. Highly compressed video images willsuffer even more from delivery aberrations.Additionally, the complexity and nature of thebroadcast video delivery network may easily maska problem’s root cause.As a real time means to measure, assess, andmanage video performance and quickly isolate various Transport Stream Recorders.problems in their early stages, Video TransportStream Recording servers are recommendedacross various strategic points in the network.(Reference Figure 1) These specialized devices,while like normal servers in that they can recordlarge amounts of video up to 40 Terabytes incapacity, have the added capability to analyze Bypass DVB-Tmultiple format video transport streams in real O I Record Retriev DVBtime. The Stream Recorder should allow on-line DVB-S N e U T Panalysis and visibility into PSI/PSIP, SI and PRT DVB-C U P U IPTV Tdata tables and permit storage of complete or IPTV Tpartial Multi-Program Transport Streams. Offline TByte Storage TByteanalysis of the recorded sequences should also TBytebe accommodated.Again, the rationale is to provide visibility and Slide 20analysis into video information details not Transport Stream Recording Server Architecturenecessarily obvious in the viewed image. Thisallows for performance degradation identification and resulting fault isolation before a majorproblem occurs.In block diagram form, the Transport Stream Recorder is show in Figure 2 below. An agiledesign allows the ability to process multi-format inputs and outputs (DVB, ATSC, GigE-IP, &DVD), providing network flexibility.Various recording modes should also be available including: Continuous, Single Recordingand Event Triggered.From a control system standpoint, a Client/Server architecture is ideal. This allows formonitoring and control of all services from multiple servers from one centralized, or perhapsseveral other remote/redundant locations, via IP connectivity. This also supports file andsystem management as well as easy recording configuration of the entire network. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 18 of 29
    • Additionally, specific recorded video sequences based on adjustable parameters from anynetworked server should be capable of easy retrieval for further analysis and inspection. Formaximum flexibility, these video recording sequences should be available in a variety ofoutput formats, including DVD-compatible and native Client/Server files, IP-streaming overGigE, & DVB streaming over ASI. Any additional formats like QPSK, QAM, and/or OFDMwould be considered a plus.Finally, all communication to/from the Transport Stream Recording servers should beperformed via SNMP for maximum system flexibility and expansion. This provides astraightforward interface with next generation Broadcast Operation Support Systems thatmanage all service types, spanning legacy to next generation converged media services. Additional features of importance in an effective broadcast network monitoring system are: ● Configuration of the entire network via a GUI interface with graphical elements ● Element manager support across multiple equipment manufacturers (i.e. performing as an “umbrella” management system for multiple pieces of dissimilar equipment) ● SNMP monitoring and control capability of all devices in the entire system ● Visualization of system status ● Centralized fault management with: - fault recognition / alarm processing - error correlation - user error messages (SMS, fax, e-mail, etc) - redundancy switching (manual or automatic) ● Disaster recovery ● Event logging of all events (alarms, user and system actions, etc.) ● Archiving / housekeeping ● User administration st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 19 of 29
    • V.BOSS is a standards-based management tool that can Grow and Adaptwith Your Network Evolution – SID model, SOA, ESBDimetis BOSS supports both the proprietary network technology such as DTM as well asstandardized MPLS, PBT and IP over DWDM. Link Manager is a scalable solution based ona comprehensive video end-to-end service management platform. It supports both uni- andbi-directional, point-to-point and point-to-multi-point services for broadcast and telecomenvironment. It addresses one of the most critical issues of broadcast and telecom providers,how to get a compressed / uncompressed video signal across WAN based on customerdefinable QoS parameters. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 20 of 29
    • Dimetis BOSS provides specific functionality to provide: ● Reduced network complexity and improved transport efficiency thru traffic engineering across multiple networks reducing the complexity of multiple element/network management system ● Design of network configurations for complex equipment and circuit layout records such as video routers, encoders, decoders, multiplexers, switches, routers, etc. using standard templates for the assignment of resources, ● manage current inventories of network resources and capacity, down to a port and virtual channel level, ● order and schedule future resources to meet expected demands, ● troubleshoot network outages. ● Complex end-to-end service activation/monitoring spanning multiple network elements/EMSs, encoders, decoders and video routers ● Automated, manual or assisted inventory reconciliation thru auto-discovery ● Automated fulfilment-assurance chain for fault resolution and service continuity ● SLA based service monitoring and chargingThe BOSS Platform consists of the following modules: ● ESB ● Inventory ● Activation ● Broadcast Activation ● SLA Manager ● Performance Manager ● Fault Manager ● License Manager ● Security Manager ● Mediation st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 21 of 29
    • 1. ESB: The Enterprise ServiceBus with message-orientedmiddleware (MOM) and closelycoupled with web services is thecommunication system between theLink Manager components. ESBincludes services as coordination ofbusiness processes, or protocoltransformation. The internal andexternal Link Manager solution isbased on telecom standards of TeleManagement Forum (TMF) e.g.NGOSS, OSS/J and SID. OSS/J isthe leading industry standard, which provides a full range of API to external OSScomponents.2. Inventory Manager:The inventory managementsystem supports a veryflexible schema where the enduser can setup a networktechnology based on his/herneeds thru simpleadministration. Furthermorethe existing processes within atelecom/broadcastenvironment can becaptured/modified or adjustedas per customer need thru avery powerful processmanager. An innovative GUIbased on latest SWtechnologies allows user to easily carry out their day-to-day job, by simply click and drag-and-drop elements into the GUI. Users can select between the mouse-driven approach vs.the traditional tabular screen.The inventory systems manages the following objects: ● Site: ● Equipment: ● Segment (leased lines) ● Cables ● Service path ● Customer st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 22 of 29
    • Based on the above 6 objects, all current and future networks can be managed within asingle centralized platform. Key functionality groups of the inventory system are: ● Bandwidth and resource management ● Traffic Engineering for both broadcast and telecom services ● Future service planning ● Flexible process support ● Template management3. Activation: The Activation Engine has the functionality to configure different capabilityof Network Elements deployed in the network; the network element can be physical device orlogical component. The Network Elements require initialization parameters for them toinitialize and perform the services they are intended to. The Activation Engine Modulehandles configuration and activation of Product, Service & Resource and also executes theservice templates. Activation Engine receives the clients request and validates the operationdetails and corresponding parameter details and accordingly calls the Device Adapter tocommunicate with the Network Element and process the execution output and send theresponse back.Activation main capabilities are: ● Configuration of network elements ● Device adaptor toolkit: The basic functionality of this module is to separate the device specific implementation with the core device provisioning interface. ● Discovery manager: The discovery of network elements irrespective of the type of the network element.4. Broadcast Activator: Broadcast Activation is a powerful engine to control and monitorbroadcast specific devices, including: ● Encoder ● Decoder ● Video routers ● MultiplexerBroad Activation supports a number of existing devices. In addition a flexible SDK allows formodification of existing adapters.5. SLA Manager: The Service Level Assurance system, which monitors the networkand associated devices in the network continuously. This system checks/collects thepredefined and specific parameters from the network elements. The SLA system determinesthe specific fault condition of the network depending on the retrieved parameter value andaccordingly takes corrective action such as activate the redundancy service path for thecustomer using the faulty path. SLA communicates with the Activation System to collectinformation from the network elements or components. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 23 of 29
    • 6. Performance Manager: The Performance management module involves the periodiccollection of quality metrics that characterize the performance of the network resources overservice intervals. It also facilitates the visualization of trends that can indicate periodic orgradual degradation of physical re-sources. The Performance management module is madeup of three main functional components – ● Data collection and storage ● Monitoring ● Reporting ● Threshold calculation of performance counters and raise alarms ● Fault Manager: The basic functionality of the fault management system is to provide following – ● Detects, isolates, prioritize, and correct malfunctions in a telecommunication network ● Compensate for environmental changes ● Maintaining and examining error logs ● Accepts and acts on error detection notifications, tracing and identifying faults ● Carry out sequences of diagnostics tests, correcting faults, reporting error conditions, and localizing and tracing faults by examining and manipulating database informationWhen a fault or event occurs in a network element, the fault management systemunderstands the same and accordingly correlates them, report the root-cause and then takecorrective action. The fault management system has the following internal component tohandle fault in the network: ● SNMP Trap Manager to receive and understand fault trap messages from the network element ● Passive fault component is done by collecting alarm details from the device periodically, and processes them accordingly. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 24 of 29
    • ● Active fault component actively monitors each configured devices and check their health status and determine the service availability.7. License Manager: Independent service which provides the functionality to define thelicensable features and other licensable components, encrypt/decrypt license contents andalso validates licensable attributes.8. Security Manager: This component will handle two types of functionality – ● User Management – this to define user and user groups ● User Access Control List – this to define and associate different user access rights. This also provides the functionality to validate and authorize different functionality per user depending on allocated user/group access rights.9. Mediation: is a future module of the link manager solution. It provides the detailedtraffic information which is traversing the networks from a point to multiple points. Themediation system feeds the captured data into billing system.Dimetis BOSS HW and SW requirements1) The Link Manager Framework should be compatible to deploy on different applicationservers, like – JBOSS, BEA, IBM, TIBCO, Tomcat etc.2) Supported platforms – Linux, Solaris & WindowsFollowing defines the Hardware requirement to run the Dimetis BOSS solution: Software Instance Hardware Required (Minimum) 1 Oracle 10G 2 GB memory, 80 GB HD (Scalable) with dual processor, server machine 2 Activation engine 2 GB memory, 80 GB HD with dual processor, server machine 3 Inventory engine 2 GB memory, 80 GB HD with dual processor, server machine 4 Activation and Inventory 2 GB memory, 80 GB HD with dual processor, server machine 5 Activation and Inventory 4 GB memory, 160 GB HD (Scalable) with with Oracle dual processor, server machine st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 25 of 29
    • VI.BOSS can Help You Migrate to a Robust Service Oriented Architecture(SOA) for Integrating Media Distribution over IPTV, Broadcast, Video-on-Demand, Webcast, & MobileCast – all with Realtime Payload AssuranceTo support the avalanche of mobile multimedia and home theaters a newer generation ofOSS needs to be introduced, in order to support the concept of “Virtual Home Environment”or a “network agnostic kind of service at any time”. Crucial for a successful future scenariois an accurate inventory/Service Resource Management along with an on-line discoverysystem.NGN is according to widely accepted ITU-T definition “a packet-based network able toprovide services including Telecommunication Services and able to make use of multiplebroadband, QoS-enabled transport technologies and in which service-related functions areindependent from underlying transport-related technologies”. The end-to-end packet-basednetworks include both the transport and access networks, eliminating the need for convertingpackets into circuit and vice versa. Converged networks including UMTS, WiMAX, WLANalong with IMS are adding more complexity to the already mentioned requirements. TheUMTS term “Virtual Home Environment” (VHE) is becoming even more important, sincesubscribers can use their “unified services” everywhere at any given time, independent fromthe underlying technology. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 26 of 29
    • Requirements for new OSS to serve NGNVarious organizations such as ETSI, ITU and TMForum are developing standards in order toguide ISVs building modern OSS/BSS with a future proof? approach. TMForum’s TMF053(NGOSS), GB922 (SID) and ETSI’s Tispan are activities with a focus on NGN requirements,independent from the standard body ISVs need to meet the general requirements of newnetworks. Because of the dynamic nature of the NGN and dynamic transient services, adifferent set of OSS/BSS applications are required. Some of the specific requirements fromthe OSS point of view are: Split of converged services and underlying technologies, Dynamic service-portfolio (self-configurable) based on broadband access, Inter-networking with legacy environment, Virtual (unified) home environment within converged networks (Fixed/Mobile).The operation and maintenance of NGN in carrier-grade environment based on a dynamicunderlying transport network (e.g. IMS, IP Multimedia System) requires a robust, scalable,flexible and open OSS architecture. A crucial part of the new OSS will be an accurate andalways up-to-date inventory and service resource management. The inventory systemserving as the database-of-record for network inventory provides the infrastructurefoundation necessary to support flowthru provisioning and automated service delivery.Because of the possible changes of the underlying technology for the same service (e.g. bymoving from a home cell to UMTS cell in a future scenario), the database of record needs tobe updated and kept up-to-date on-demand at all time. This will enable other OSSapplications such as Fault Management to provide a better end-to-end view of possible faultsrespectively all affected customers.flexible inventory is part of the new OSSWhile most carriers are implementing the Triple-Play services (voice, data and video) rightnow, future networks will support services beyond the traditional Triple-Play. In order toprovide a network agnostic service, a flexible Service Resource Management (SRM)inventory system needs to model the objects in a way that services are independent fromtransport network. In order to support the flexibility of the platform during the operation, anextendable, easy-to-adapt data model is required. The associations between services andtransport need to be pre-built and dynamically re-assigned during a user movement from oneaccess technology to the other. Since the intelligence of dynamic routing resides in thenetwork elements itself, there is no means to update the inventory data manually and/or as abatch process. The so called “online-discovery” needs to pull the data out of variousnetworks, reconcile them and feed them back into SRM inventory on-demand. Whilereconciliation of a limited number of NE and the associated services are easy to handle, acarrier-grade environment pose a thread to the stability of the inventory solution.As mentioned earlier a solid SRM inventory solution provides the foundation of the flowthruprovisioning. In order to provision multiple services among multiple technologies, a powerful, st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 27 of 29
    • scalable and technology neutral process engine is required to activate services and theunderlying transport networks in various domains, such as UMTS HLR, Radius-Server (orDiameter) and softswitches. In order to meet the requirements for a VHE, the same servicesneed to be prepared in various domains, but the status needs only to be changed, once theservice is really in use. In all the other cases, these unused resources (such as bandwidth fora leased line) can be shared with other users/applications and hence their status is definedas pending/unused. The multitude number of possible NMS/EMS or application transactionsfor a single user increases dramatically for hundreds of users.In a highly heterogeneous environment, a flexible inventory systems needs to keep track ofall ongoing activities in the network. While the inventory platform can keep the data in acentralised (or distributed) database, an activation/configuration engine needs tocommunicate with various subsystems, e.g. configuring a softswitch for a specific customerin IMS, registration in the HLR database and registration on the video application server. Inorder to provision the services properly and time effectively, at first all resources need to beallocated in the inventory system. Hereafter each target provisioning unit needs to beprovided withtheconfigurationinformation. Atthe end of thischain thestatus of theoverall servicepackage (e.g.,“Cross-TechnologyVoice Service”)for thatcustomer canbe updated.Failing to missone targetplatform willforce therollback of allactivatedservicesrespectivelychanging thestatus of the An accurate inventory platform as foundation for the new OSSservice.Other areas of interests for service providers are self-provisioning tools for value addedservices. In order to provide customers with the ability to create or upgrade an alreadyprovisioned service (such as upgrade one LSP from 1Mbit to 2Mbit), the Order ManagementSystem needs to forward the requests to the end-to-end-flowthru provisioning system. Afterthe inventory search of the customer’s data, the associated bearer-service, e.g., MPLS LSPrespectively bandwidth, can be checked and more bandwidth allocated. In this case thebandwidth order needs to be passed to the identified activation engine in the IMS network. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 28 of 29
    • In order to manage various services in a technology-agnostic manner, the underlying datamodel needs to decouple services and technologies (good point!). Furthermore a flexibleassociation between service such as “Voice Service” and the various underlyingtechnologies such as MPLS, WiMAX and UMTS needs to be created. In order to keep thedata accurate while still maintaining performance during the operation, the 1 to n associationbetween service and the underlying technologies needs to be updated while the user ismoving from one technology to another technology. This ensures an always accuratesnapshot of all services (including all the linked technologies) and provide Fault andPerformance Management application with the most recent data.A carrier-grade, future-proof, scalable, flexible and open OSS is shown in Figure 2. Here acentralized and clustered Enterprise Application Interface (EAI) or a Java MessagingServices (JMS) can be used to glue all the OSS components of the new OSS platformtogether. The advantage of the centralized EAI bus as opposed to an overall point-to-pointsolution, is a more flexible and scalable approach. All the required OSS components can beused as plug-ins based on their standard-adapter (e.g. using SID – I don’t think you will getthis from the SID). In order to distribute the load of computing among various servers, thefollowing application, inventory, process engine and activation engines can be physicallylocated on various servers. This ensures for a very robust and scalable solution, whilemaintaining the flexibility of the OSS. Online-discovery shall operate as a mega-discoverysystem connecting to various technologies and reconciling this information to a meaningfuldata set. In order to keep the data volume and the resulting computing resources as low aspossible, the necessary data need to filtered and processed by the rule-based discovery. Dimetis GmbH, headquartered in Dietzenbach, Germany, is a leading software and hardware Systems Integrator, providing standards-based and customized OSS solutions. Its BOSS Platform is deployed in various configurations at some of the world’s largest Carriers and TV Broadcasters. st1 Rough Draft - 7/30/2008 CONFIDENTIAL for review only pg. 29 of 29