Page 281 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 4

naming, e.g. the service access point (SAP) on the VSERs aids with that; 2) control plane functions to aid
network services like mobility; 3) to aid application services, such as in this case the A/V conferencing service.

The VSER nodes are overlaid over IP, whose state is orchestrated by OpenStack and ONOS. ONOS implements
multiple controllers towards this demo: 1) the ICN network controller abstracts the VSER nodes to
applications, to enable connectivity between service functions, UE and the content resources; 2) the mobility
controller implements the domain level dynamic name resolution function, through which the mapping of a
identifier to one or more locator names are managed; 3) the video conference controller manages the control
and Interest forwarding logic to interconnect the audio/video flows from multiple participants. OpenStack is
used to manage the operation of provisioning and deleting Virtual Machines executing specific control plane
of application logic in the VSERs; this is conducted through APIs exposed by OpenStack by a custom
orchestrator called the Service Manager.
ICN services are orchestrated by the Service Manager. It implements the video conferencing service
controller through which a user requests to provision a conference instance. The A/V controller in the service
manager requests OpenStack to provision the relevant service function in the context of the given service.
Once these services are active, they update the application controllers in ONOS to initiate appropriate routing
rules to interconnect the services with one another and conduct dynamic routing when events such as
participants join and leave the conference.

Service Manager
Virtual Service Edge Router (VSER)
Video Service IoT Service
Orchestrator Orchestrator
A/V App SAL
A/V App SAL SAP Conf. Service Func. Mobility Agent
CCN SAP Conf. Service Func. Mobility Agent Mobility Video Conf. CCN
(ICN-API) Open Stack Controller Controller IP
IP ONOS ICN Network CCN
CCN Controller
Wifi
IP Wifi
IP
(OpenFlow) VSER
VSER

Edge Cloud-3
Edge Cloud-1
(ICN-API) IP Transport
Wifi
VSER
Wifi VSER

Edge Cloud-2 Overlay CCN Multicast Flows
Edge Cloud-4

Figure 17 – VSER System Architecture

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