MecAppBase¶

simple module MecAppBase

This is a MEC app that … TBC

Inheritance diagram¶

Known subclasses¶

Name	Type	Description
MecRequestBackgroundApp	simple module	Generates requests to be sent to the LocationService. This application can be instantiated as an “independent MEC app” (see MecHost module), which means it does not need to be instantiated via the MEC orchestrator upon request from a User Equipment. In particular, this module produces bulks of GET requests, as generated by a configurable number of MEC applications running on the MEC host. The result of such requests is to delay the service of real requests (i.e., those originating from complete MEC applications)
MecRequestBackgroundGeneratorApp	simple module	Generates requests to be sent to the LocationService. This application can be instantiated as an “independent MEC app” (see MecHost module), meaning it does not need to be instantiated via the MEC orchestrator upon request from a User Equipment. Specifically, this module produces batches of GET requests, as generated by a configurable number of MEC applications running on the MEC host. The effect of such requests is to delay the service of actual requests (i.e., those originating from complete MEC applications)
MecRequestForegroundApp	simple module	Implements a MEC application that issues GET requests to the LocationService every 500ms. This application can be utilized as an “independent MEC app” (see MecHost module), hence it does not require instantiation via the MEC orchestrator upon request from a User Equipment. Essentially, this application provides a quick way to generate configurable load to the Location Service and simulate different (and potentially more realistic) response times from the latter.
MecResponseApp	simple module	Represents an application that is dynamically instantiated on a MEC host upon request from a UeRequestApp, via a DeviceApp. Upon receiving a request from the UE, it queries the LocationService to obtain some information (which is not utilized; it is intended only to “consume” some time), and sends a response message to the UE after a computation time that depends on the current resource utilization at the MEC host.
MecRTVideoStreamingReceiver	simple module	Application that is dynamically instantiated on a MEC host upon request from a RtVideoStreamingSender application via a DeviceApp. It receives video frames sent by the UE and simulates a playout buffer. Moreover, it records statistics related to the quality of the received video stream. Note that the statistics are collected by the RtVideoStreamingSender application at the UE side.
MecRnisTestApp	simple module	Application that is dynamically instantiated on a MEC host upon request from a UeRnisTestApp via a DeviceApp. It is used to test and showcase the functionalities of the RniService API. Upon receiving a request from the UE, it queries the RniService periodically to obtain L2 measurements related to the UE that sent the request (refer to the sendQuery() function). The results obtained from the RNIS are sent back to the UeRnisTestApp in a response message. Please note that the response time of the RNIS depends on the current load at the RNIS.
MecWarningAlertApp	simple module	Application that is dynamically instantiated on a MEC host upon request from a UeWarningAlertApp via a DeviceApp. It receives requests from the UE to be notified when it enters a circular area defined by its center and radius. This is accomplished by subscribing to the LocationService provided by the MEC Host. This module receives a notification from the Location Service when the UE enters/exits the area and, in turn, sends a message to the UE.

Parameters¶

Name	Type	Default value	Description
mecAppId	int
mecAppIndex	int
mp1Address	string	“”
mp1Port	int	10021
vimModule	string	“^.vim”	Module references
mecPlatformModule	string	“^.mecPlatform”
serviceRegistryModule	string	“^.mecPlatform.serviceRegistry”
requiredRam	double		Required resources
requiredDisk	double
requiredCpu	double
timeToLive	int	-1	If not -1, set the TTL (IPv4) or Hop Limit (IPv6) field of sent packets to this value
dscp	int	-1	If not -1, set the DSCP (IPv4/IPv6) field of sent packets to this value
tos	int	-1	If not -1, set the Type of Service (IPv4) / Traffic Class (IPv6) field of sent packets to this value

Properties¶

Name	Value	Description
display	i=block/app;is=s

Gates¶

Name	Direction	Size	Description
mePlatformIn	input
mePlatformOut	output
socketIn	input
socketOut	output

Source code¶

//
//  This is a MEC app that ... TBC
//
simple MecAppBase like IMecApp, IApp
{
    parameters:
        @display("i=block/app;is=s");

        int mecAppId;
        int mecAppIndex;

        string mp1Address = default("");
        int mp1Port = default(10021);

        // Module references
        string vimModule = default("^.vim");
        string mecPlatformModule = default("^.mecPlatform");
        string serviceRegistryModule = default("^.mecPlatform.serviceRegistry");

        // Required resources
        double requiredRam @unit("B");
        double requiredDisk @unit("B");
        double requiredCpu;

        // Socket parameters
        int timeToLive = default(-1); // If not -1, set the TTL (IPv4) or Hop Limit (IPv6) field of sent packets to this value
        int dscp = default(-1); // If not -1, set the DSCP (IPv4/IPv6) field of sent packets to this value
        int tos = default(-1); // If not -1, set the Type of Service (IPv4) / Traffic Class (IPv6) field of sent packets to this value

    gates:
        input mePlatformIn;
        output mePlatformOut;

        input socketIn @labels(TcpCommand/up);
        output socketOut @labels(TcpCommand/down);
}

File: src/simu5g/apps/mec/MecApps/MecAppBase.ned