Question 11/9 - Transmission of multichannel analogue and/or digital television signals over optical access networks
(Continuation of Question 11/9)
Motivation Recent fibre optical transmission technology allows extending fibre networks to the curb, the building or the home.
Fibre networks can be brought closer to users' premises than hybrid fibre coaxial networks.
Fibre technology can provide the higher capacity in the forward and return channel, which is required for the provision of typical cable television services, including interactive ones.
Fibre technology provides the fat bandwidth (100 Mbps or more) on its communication links and is being deployed as the Internet access network. Although fibre networks have the potential to transmit high quality television signals and several Recommendations on optical access networks such as G.983 and G.984-series have been developed, further study on the interworking and interfaces between digital video systems and fibre networks is needed.
Question Study items to be considered include, but are not limited to:
- Which mechanisms can be used to transport multichannel analogue and/or digital television signals over fibre networks, in view of the high loss of optical splitters used for PON (passive optical networks)?
- Which mechanisms can be used to ensure the low composite distortion and high carrier-to-noise ratio (CNR) that are required for frequency division multiplex (FDM) transport of mixed analogue and digital television signals over fibre networks?
- Which mechanism can be used to transport multichannel digital television signals over fibre networks in term of a high-speed digital communication link?
- Which mechanism can be used to compensate the jitter arising from transporting over asynchronous communication links over fibre networks?
- Which mechanism can be used to compensate the packet loss arising from transporting over best effort communication links over fibre networks?
- Which mechanism can be used to control access to the traffic in term of traffic management and security?
- Which mechanism or interface can be used to coordinate digital video systems with optical access and core networks?
- What enhancements to existing Recommendations are required to provide energy savings directly or indirectly in information and communication technologies (ICTs) or in other industries? What enhancements to developed or new Recommendations are required to provide such energy savings?
Tasks Tasks include, but are not limited to:
- Preparation of new Recommendation(s) regarding the above study items as well as maintenance of existing Recommendations such as ITU-T J.185 and J.186.
An up-to-date status of work under this Question is contained in the Study Group 9 work programme (
http://itu.int/ITU-T/workprog/wp_search.aspx?sp=15&q=11/9).
Relationships - Recommendations
- ITU-T G.983-series, G.984-series and other G-series Recommendations addressing optical fibre networks, systems and interfaces
- Questions
- Study groups
- ITU T SG 15 (optical network architectures, particularly those related to PON systems, and optical interfaces)
- Standardization bodies
