NSI/NSSI Selection based on resource occupancy levels

Overview

For every new shareable slice creation request, OOF checks whether any existing slice can be reused.

OOF selects the suitable NSI/NSSI for reuse based on the resource utilized for the existing slices.  To decide the reusability of slices, it needs to know the remaining capacity available for those slices.

OOF depends on  DCAE (Slice Analysis MS) for the relevant details.

Slice analysis MS in turn requests DES (Data Exposure Service) for the PM data for a specific time interval, converts it into configuration data, aggregates the configuration data for the slices  and returns it back to OOF.

With this current configuration data, OOF further checks against the actual requirements of these slices from the service/slice profile and finds the occupancy level.

The interface details between OOF and Slice Analysis MS are below.

API Definition

Get utilization of Slices

Request Body

{
	"sliceIdentifiers": [
		"7e000ddc-7ba1-4fdb-a7ce-8f0a65ab3282",
		"cb51e744-bfcf-4188-885a-e3e3c51ed53e"
	],
	"configParams": [
		"dLThptPerSlice",
		"uLThptPerSlice",
		"maxNumberOfConns"
	]
}

Response Codes

Response Body

SliceConfigResponse - Sample Response

{
	"sliceConfigDetails": [{
		"sliceIdentifier": "5d9b3293-fa20-4776-bb41-92ba5e384419",
		"aggregatedConfig": {
			"dLThptPerSlice":27,
            "uLThptPerSlice":30,
            "maxNumberOfConns":300
		}
	},
	{
		"sliceIdentifier": "e316f4b2-01fa-479a-8522-64fe9c0c2971",
		"aggregatedConfig": {
			"dLThptPerSlice":40,
            "uLThptPerSlice":25,
            "maxNumberOfConns":400
		}
	}]
}