> For the complete documentation index, see [llms.txt](https://zzcabbage.gitbook.io/great-oai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zzcabbage.gitbook.io/great-oai/mec-model/mec-model-dev.md).

# MEC Model Dev

A dev project about “Perception-Computing-Response” model

## Index

This project includes the following mods:

### Sys

* UUID
* HTTP/2
* ConnectionTypeIdentification
* ConnectionInfoStructure
  * ConnectionID
  * TaskID
  * ServiceInfo
* MySQL DB

### UUID

we make a random UUID with uuid lib in python:

* uuid\_generator()

```
import uuid
uuid.uuid4()
```

### HTTP/2

HTTP/2 relies TLS to achieve security, thus we use UDP socket as a temporary transmission tool.

* udp\_socket\_send(msg, ip, port)

```
s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.sendto(msg.encode(), (ip,port))
```

* udp\_socket\_rev(ip, port)

```
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.bind((ip, port))
data=s.recv(1024)
print(data.decode())
```

### ConnectionTypeIdentification

For the “Perception-Computing-Response” model, three values are used to indicate different transmission link between UE, MEC and MCC as follows:

* "1" represents the "UE-MEC" link;
* "2" represents the "MEC-MCC" link;
* "3" represents the "UE-MCC" link.

### ConnectionInfoStructure

#### ConnectionID

ConnectionID is a random UUID generated by UE. A sample is: b54d5fb8-9a5b-42fb-82eb-0917bfdea427.

#### TaskID

TaskID is designed for indicating a service of internet services provider. In order to realize flexible assignment of offload, TaskID includes two parts，ServiceID and SubserviceID, to indicate different task in a service.  A sample is as follows:

1AA1 (TaskID) = 1A (ServiceID) A1 (SubserviceID)

### ServiceInfo

For example, ServiceInfo can bring the necessary information of MEC for UE, which indicates the service status of MEC. 

#### UE-MEC

The ServiceInfo of UE-MEC link is as follows:

```
ServiceInfo_ue_mec[0] = 1
ServiceInfo_ue_mec[1] = ConnectionID
ServiceInfo_ue_mec[2] = mec_ip
ServiceInfo_ue_mec[3] = mec_port
ServiceInfo_ue_mec[4] = TaskID
```

#### MEC-MCC

The ServiceInfo of MEC-MCC link is as follows:

```
ServiceInfo_mec_mcc[0] = 2
ServiceInfo_mec_mcc[1] = ConnectionID
ServiceInfo_mec_mcc[2] = ue_ip
ServiceInfo_mec_mcc[3] = ue_port
ServiceInfo_mec_mcc[4] = SubTaskID
```

#### UE-MCC

The ServiceInfo of UE-MCC link is as follows:

```
ServiceInfo_ue_mcc[0] = 3
ServiceInfo_ue_mcc[1] = ConnectionID
ServiceInfo_ue_mcc[2] = ue_ip
ServiceInfo_ue_mcc[3] = ue_port
ServiceInfo_ue_mcc[4] = TaskID
```

### MySQL DB

As for a prototype verification, MySQL DB is a planned issue.