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4.3.2 MEC for Serverless Computing and Cloud Integration for Massive IoT Devices

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MEC will enable serverless computing for a key 5G use case, namely. massive IoT devices, by hosting Function as a Service (FaaS) in the edge and supporting integration with the cloud service provider as shown below. In this implementation model FaaS could be implemented through cloud wrapper MEC application(s) running on one or more MEC hosts and provisioned with the required resources, managed locally via an MEC service application. The initial traffic steering from the MEC AF will set up the routes such that the packets from a range of IoT devices are directed to the correct cloud wrapper MEC applications.

Figure 9. MEC host with and without break-out to cloud.

The egress traffic could be sent back to the IoT device, breakout to a cloud service provider from the cloud wrapper MEC application or transferred to another MEC application with the correct resources. The MEC application and/or MEC service may indicate to the AF to initiate traffic steering to an alternate MEC host with the required resources, if needed. Such indication can be made via traffic rule activation over the application enablement API.

Figure 10. Traffic steering to alternative MEC host.