6.6 Efficient content delivery

22.2613GPPRelease 18Service requirements for the 5G systemTS

6.6.1 Description

Video-based services (e.g. live streaming, VR) and personal data storage applications have been instrumental for the massive growth in mobile broadband traffic. Subject to service agreement between the operator and the content provider, the information of content and content itself can be aware by operator. In-network content caching provided by the operator, a third-party or both, can improve user experience, reduce backhaul resource usage and utilize radio resource efficiently.

The operation of in-network caching includes flexible management of the location of the content cache within the network and efficient delivery of content to and from the appropriate content caching application. Examples of services are the delivery of popular video content from a content caching application via broadcast, and secure storage of a user’s personal data or files using a distributed caching application. Such a service could also provide a student with a wireless backpack, where students can resume their work through the same or a different UE at any time, with very fast response times from the network.

6.6.2 Requirements

The 5G system shall enable efficient delivery of content from a content caching application under the control of the operator (e.g. a cache located close to the UE).

The 5G system shall support a content caching application in a UE under the control of the operator.

The 5G system shall support configurations of content caching applications in the network (e.g. access network, core network), that provide content close to the UE.

Based on operator policy, the 5G system shall support an efficient mechanism for selection of a content caching application (e.g. minimize utilization of radio, backhaul resources and/or application resource) for delivery of the cached content to the UE.

The 5G system shall support a mechanism for the operator to manage content distribution across content caching applications.

The 5G system shall support delivery of cached content from a content caching application via the broadcast/multicast service.

For a 5G system with satellite access, the following requirement applies.

– A 5G system with satellite access shall be able to optimise the delivery of content from a content caching application by taking advantage of satellites in supporting ubiquitous service, as well as broadcasting/multicasting on very large to global coverages.