Merge pull request #128 from camaraproject/Kevsy-patch-7

Create README.md for Discovery folder with intents ( to be reviewed when Discovery and MVP APIs are merged)

code/API_definitions/Discovery/README.md

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+# Edge Discovery APIs
+
+## Simple Discovery API
+This API allows a client application to discover the closest MEC platform to the UE hosting the client application. 'Closest' means 'shorteset network path' as that will give the shortest propogation distance, which is a major factor in latency.
+
+## MEC Experience Management and Exposure API
+This API allows a developer to:
+- discover available MEC platforms, ranked by proximity to a UE.
+- read the state (availability and capabilities) of an operator's various MEC platforms.
+- register a service profile (a description of the developer's edge service) with the MEC operator
+- register the deployed service endpoints with the MEC operator, which allows the closest service endpoint to be discovered at runtime
+
+The API will also support the following capabilities: 
+- events(such as change of status of a MEC platform or another event which could affect their service)
+- subscription to notification of events.
+
+# Mapping to the list of intents
+
+These APIs fulfil the ['discovery' intents](https://github.com/camaraproject/EdgeCloud/blob/main/documentation/SupportingDocuments/Harmonisation%20of%20APIs/describing%20and%20harmonising%20the%20Edge%20APIs.md)
+
+*Simple Edge Discovery* fulfils a single intent,  "4. I can discover the closest MEC platform to a specific terminal (closest in terms of shortest network path)"
+
+*MEC Exposure and Experience Management* is a more comprehensive discovery API and fulfils the following intents:
+
+### Developer intents
+#### Provisioning intents 
+1.	“I can retrieve a list of the operator’s MECs and their status, ordering the results by location and filtering by status (active/inactive/unknown)”
+2.	"I can discover the capabilities/resources available at an operator’s MEC: CPU, Memory, Storage, GPU"
+3.	"I can discover the geographical regions covered by the operators MECs"
+4.	"I can discover the closest MEC platform to a specific terminal (closest in terms of shortest network path)"
+
+16.	“I can ask the operator to provide the details of all the onboarded applications”
+17.	"I can ask the operator to inform about the application instance details e.g., communication endpoints, resource consumed etc"
+
+
+#### Runtime intents 
+19.    "I can discover the closest MEC platform to a particular terminal (closest in terms of shortest network path)"
+20.    "I can discover the optimal MEC platform for my application and a particular terminal, taking into account connectivity, shortest network path, cost, network load etc." (`A`)
+21.    "I can discover the optimal application service endpoint for a specific terminal, taking into account mobility events, connectivity, shortest network path, cost, network load, MEC platform load etc."
+
+### Operator intents
+#### Provisioning intents
+23. “I can publish an (ordered, filtered) list of my MECs, their coverage, capabilities and status” _(aligns with 1,2,3 in the developer intents)_ 
+24. “I can map an application’s requirements to the best MEC for hosting it, based on application demands for CPU,Memory,Storage,GPU,bandwith,Network forecast, mobility” _(aligns with 4,5,8,9)_ 
+#### Runtime intents 
+25. “I can inform the developer of any event which changes which MEC is optimal for their application and connected terminals” _(aligns with  6)_
+
+## Notes:
+
+`A` this may not be the closest MEC, rather the 'best MEC for this job' which accounts for current MEC or network load, MEC copmute power and features etc.