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The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
Major video models may refer to: | broadcast video or multicast models replicating the behaviour of a Cable TV (CATV)system offering a customer multi-channel viewing 'store for play' model or download model allowing the customer to load the video onto a local disk for viewing VoD or unicast models allowing the customer to stream video in real-time as selected by the customer. |
Video challenges may include: | streaming video requiring real-time consistent network performance user perception of video to be a continuous long term experience with complaints if any significant portion goes badly video being bandwidth hungry as an application. |
Competing TV broadcast technologies may include: | CATV internet TV or content delivery network satellite TV. |
Topology of an IPTV network may include: | digital subscriber line access multiplexer (DSLAM) head end servers home gateway media centres media content servers MPLS routers MPLS switches set-top box (STB). |
Network architecture may include: | Access Networks: carrier Ethernet fibre to the x (FTTx) passive optical network (PON) wireless fidelity (WiFi) worldwide interoperability for microwave access (WiMAX) x digital subscriber line (DSL) core distribution network (MPLS) internet TV or content delivery network (CDN): CDN applications: hyper syndicated video session shifting user generated content internet delivery protocols: Flash (RTMP, RTMPE, RTMPT and RTMPTE) HTTP RTSP internet video formats: video compression protocols (Flash, MPEG-2, MPEG-4, H.264and VC-1) video encapsulation (MP4, WMV, AVI, SWF, FLV) terminal device: home gateway media centre STB. |
IPTV standards bodies may include: | third generation partnership project (3GPP) - IP multimedia subsystem (IMS) 3PPP DVB European Telecommunications Standards Institute (ETSI) Home Gateway Initiative (HGI) International Telecommunications Union (ITU-T) Open IPTV Forum (OIPF) Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN). |
Network parameters may include: | broadcast system: acquisition video quality (MPEG 2 - 6 to 20 Mbps) distribution video quality required(H.264 2 to 8 Mbps) level of redundancy number of standards definition (SD) and high definition (HD) linear channels CDS: amount and location of vault storage required number of VoD titles (SD and HD) placement of streaming caches reduces network bandwidth storage and stream redundancy required streaming capacity based on peak concurrent streams required conditional access system: number of concurrent leases number of STBs peak transactions per second headend control system: number of STBs changing channels number of STBs rebooting at one time network requirements: access and customer links bandwidth across the core number of linear channels viewed at a given time placement of VoD streamers to save bandwidth. |
Network solutions may include: | dense wavelength division multiplexing (DWDM) application on optical fibre network capacity separation of VoD to other applications size of pipe star rather than mesh topology. |
VoD design requirements may refer to: | delivery model: characteristics of customer access network and metro connection network management and support model: ways of ordering, supporting and billing service model: appliances to which video is delivered to nature of content video format. |
Network design requirements may include: | bandwidth number and type of core and edge routers number of channels protocols: BGP IGMP label distribution protocol (LDP) OSPF resource reservation protocol (RSVP) RTSP WCCP quality of service (QoS) security throughput. |
Factors may include: | protocol incompatibility QoS issues: jitter latency loss rate throughput router availability. |
MPLS network may include location and type of: | core label switch routers (Core LSR) edge label switch routers (Edge LSR) hosting servers for media content. |
Layer 2 protocols may include: | asynchronous transfer mode (ATM) Ethernet frame relay IGMP packet over SONET (POS) point to multipoint for IPTV (p2mp) PPP - unicast for VoD streaming protocol independent multicast (PIM) spanning-tree protocol (STP). |
Operational processes may include: | content management customer support network operations service activation service delivery. |
VoD issues may include: | congestion level problems customer care costs packet loss problems practices towards reduction of customer complaints QoS issues responsibility for customer care. |
Video delivery strategies may include: | delivery dimension: linear RF format or IPTV multicast or unicast streamed or download mobility dimension: fixed mobile both technology dimension: Ethernet or tunnel infrastructure (BRAS) using IP infrastructure (DHCP) combination of both. |
Nature of an operator's business may include: | access network broadcast or VoD strategy content and media production content delivery core network home network. |
Management tool may include: | Network and video service management for end to end video network management (ROSA) vulnerability assessment management service (VAMS). |