>> Study Group 13 : Next Generation Networks
Question 2/13 - Requirements, and implementation scenarios for emerging services in NGN
(Continuation of Question 11/13)
- Motivation
With the rapid growth of IP services, a demand has been continuously increasing to enhance the network capabilities of multi-service networks. Emerging services and evolution of existing ones, and their variety of deployment scenarios, are introducing more and more requirements on these network capabilities.
In the context of next generation multi-service network environments, study is required to extensively define the requirements imposed by these services and to specify the related service and network architectures, with the goal to maximize usage of common service capabilities and functional building blocks. Development of implementation scenarios for these services is also needed.
Key requirements to be considered are support of seamless end-to-end service operations, wireless/fixed technology-independent service access, ubiquitous support of mobile and fixed service users, and support of both IPv4 and IPv6 protocol technologies.
The MPLS/GMPLS technology, originally defined in IETF and now included in a number of ITU-T Recommendations, is gaining wide acceptance as a promising convergence technology for the next generation core networks. In order to drive the effective deployment of IP/ (G) MPLS based networks and make them capable to support evolving requirements, it is then needed to perform the above study in the context of IP/ (G) MPLS based core network scenarios.
VPN services constitute an emblematic case of evolving services in next generation network environments. Emerging requirements include simultaneous support of data, voice and multimedia flows, multicast, QoS, enhanced security, integrated mobility, service interworking scenarios, complex connectivity scenarios, customer-on-demand capabilities, integration of layer 1, 2 and 3 VPN services over common network infrastructure, multi-layer service architectures, IPv6 VPNs, service OAM capabilities, user location, identification and authorization.
Some VPN characteristics, such as such as service-transport layer separation, virtualization of resources, multipoint connectivity, and auto-discovery capabilities, assign these services a key role in service and network evolution towards next generation multi-service network environments.
As a consequence, the current study and development of Recommendations in the VPN service domain need to be continued and extended to encompass these emerging needs, ensuring parallel close relationship with the NGN-related developments.
Recommendations in force: Y.1310, Y.1311, Y.1311.1, Y.1312, Y.1261, Y.1281.
- Question
Study will consider emerging services in next generation multi-service network environments, with a particular focus on IP/(G)MPLS based core network scenarios.
Study items to be considered include, but are not limited to:
- Requirements of emerging services in next generation multi-service network environments, such as IP telephony services, mobility services, interactive real time end-to-end communications, data communication services, generalized multi-layer VPN services, content delivery services, etc. Requirements include support of seamless end-to-end service operations, wireless/fixed technology-independent service access, ubiquitous support of mobile and fixed service users, and support of both IPv4 and IPv6 protocol technologies.
- Service and network architectures of emerging services in next generation multi-service network environments, including multi-layer aspects, with the goal to maximize usage of common service capabilities and functional building blocks across different services. Capabilities include those for support of Quality of Service, Traffic Engineering, service provisioning, user location, identification and authorization.
- Implementation scenarios of emerging services in next generation network environments, including study of related mechanisms and technology enhancements to support the specified requirements (such as MPLS label assignment techniques, MPLS multicast and mobility capabilities, multi-layer techniques, etc.)..
- According to above study items, generation of requirements for enhanced capabilities of transport networks (based on IP/ (G) MPLS or alternative technology).
- VPN services being an emblematic case of emerging services in next generation network environments, continuation and extension of current work to cover evolving VPN requirements. This includes service requirements, service and network architectures, and implementation scenarios.
- Tasks
Tasks include but are not limited to:
- Development of, maintenance and enhancement to the Recommendations in the domain of VPN services (L1 VPN architectures and implementation scenarios, Generic VPN functional decomposition, QOS support in VPNs, VPN Interworking architecture and implementations, …).
- Recommendations currently under way: Y.1313, Y.nbvpn-decomp, Y.vpn-QoS.
- Development of Recommendations on emerging services in next generation multi service network environments (service requirements, service and network architectures, service implementation scenarios).
- Recommendations currently under way: Y.NGN-SRQ, Y.NGN-MOB.
- Coordination with the NGN related Questions (in particular in the areas of NGN services and NGN architectures).
- Relationships
Recommendations: Y-series
Questions: Q.3, 4, 5, 7, 11/13; 22/15 and 17/12
Study Groups: ITU-T Study Groups 4, 9, 11, 12, 15, 16, 17, 19
Standardisation bodies fora and consortia:
IETF (e.g., mpls, ccamp, l2vpn, l3vpn WGs)
ETSI (services and related architectures, fixed/mobile convergence)
3GPP and 3GPP2
MPLS and Frame Relay Alliance (MPLS-related aspects and services)
IEEE 802 LAN/MAN Standards Committee (e.g., Ethernet-based VPN)
OIF on optical transport technologies
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