Page 242 - Cloud computing: From paradigm to operation

1 Framework and requirements for cloud computing

6.2 Characteristics of distributed cloud

The characteristics of cloud computing [ITU-T Y.3500] are inherited to distributed cloud as:
– broad network access;
– measured service;
– multi-tenancy;
– on-demand self-service;

– rapid elasticity and scalability;
– resource pooling.
The distributed cloud also has the following additional characteristics:

– distributed cloud resource: The resources of distributed cloud are geographically distributed at
various types of data centres, base stations and IoT gateways. The distributed cloud resources are
pooled on demand to meet CSC requirements by using different physical and virtual resources
dynamically;

– heterogeneous infrastructure: The distributed cloud has different scale infrastructures with large
resource capacity in core/regional cloud and small resource capacity in edge cloud. The distributed
cloud needs to utilize heterogeneous infrastructure as a single system to provide various services to
CSCs;
– context awareness network: The distributed cloud has on-demand network control according to
context information for CSCs. Through context awareness network, mirrored cloud service to edge
cloud is provided directly to CSCs;
NOTE – Context information includes cloud service context information and network service context
information. Examples of cloud service context information are capacity of cloud, resource usage, service
ID/name, service location, status of neighbour. Examples of network service context information are latency,
bandwidth, quality of service (QoS), routing path.
– agile service: Cloud services can be deployed to the distributed cloud resource quickly and can be
easily developed. The developed cloud services can be rapidly and dynamically provided on-demand
across various types of distributed cloud resources;

– autonomous management: The distributed cloud has global management in core cloud for the
management of distributed cloud resources and cloud service with autonomous resource
management for edge cloud. Edge cloud can manage its own resources and services when the global
management system of distributed cloud is not applicable.

6.3 Configuration models of distributed cloud
The cloud computing needs to be distributed to nearby CSCs to support characteristics of distributed cloud.
Depending on a CSC's requirements and characteristics of distributed cloud, cloud services are deployed to
one or more cloud among edge, regional and core clouds with network functions. For each cloud service with
the CSC's requirements, network resources are allocated by network slicing which allows multiple logical
networks to run on top of a shared physical network infrastructure.

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