This module extends INET's SctpClient application by adding an output gate to send messages to the LteX2Manager and manages the connection initiation towards the peer's server module based on the configuration specified in the .ini file. Once the connection has been established, it receives messages from the peer's server module and forwards them to the LteX2Manager module for further processing and redirection to the intended submodule of the LTE/NR protocol stack.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Used in compound modules

Name	Type	Description
LteX2App	compound module	This module represents the container for all X2 applications that an e/gNodeB instantiates to enable X2 communications with its peer e/gNodeBs. Specifically, for each peer, this module contains two submodules:

Extends

Name	Type	Description
SctpClient	simple module	Client app for SCTP-based request-reply protocols. Handles a single session (and SCTP connection) at a time.

Parameters

Name	Type	Default value	Description
localAddress	string	""	comma separated list of addresses
localPort	int	0	port number to listen on
connectAddress	string		server address (may be symbolic)
connectPort	int	5000	port number to connect to
startTime	double	0s	time first session begins
numRequestsPerSession	int	1	number of requests sent per session
numPacketsToReceive	int	0
requestLength	int	1452	length of a request (bytes)
thinkTime	double	0s	time gap between requests
waitToClose	double	0s	time to wait between last message sent and abort
reconnectInterval	double	0s	if connection breaks, waits this much before trying to reconnect
inboundStreams	int	17
outboundStreams	int	1
echo	bool	false	echoes received packages when true
ordered	bool	true
queueSize	int	0
prMethod	int	0	0=NONE, 1=PR_TTL, 2=PR_RTX, 3=PR_PRIO, 4=PR_STRRST
prValue	double	0	for PR-SCTP
streamReset	bool	false
streamRequestTime	double	0s
streamResetType	int	5	NO_RESET=5, RESET_OUTGOING=6, RESET_INCOMING=7, RESET_BOTH=8, SSN_TSN=9
streamToReset	int	0
stopTime	double	-1s	time of finishing sending, negative values mean forever
primaryTime	double	0s
newPrimary	string	""
streamRequestLengths	string	""
streamRequestRatio	string	""
streamPriorities	string	""
finishEndsSimulation	bool	false
binderModule	string	"binder"

Properties

Name	Value	Description
class	X2AppClient

Gates

Name	Direction	Size	Description
socketIn	input
socketOut	output
x2ManagerOut	output

Signals

Name	Type	Unit	Description
packetReceived	inet::Packet
packetSent	inet::Packet
echoedPk	inet::Packet

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode	Description
packetReceived	packets received	packetReceived	count, sum(packetBytes), vector(packetBytes)		none
packetSent	packets sent	packetSent	count, sum(packetBytes), vector(packetBytes)		none
echoedPk	packets echoed	echoedPk	count, sum(packetBytes), vector(packetBytes)		none

Source code

//
// This module extends INET's SctpClient application by adding
// an output gate to send messages to the ~LteX2Manager and
// manages the connection initiation towards the peer's server module
// based on the configuration specified in the .ini file.
// Once the connection has been established, it receives messages
// from the peer's server module and forwards them to the ~LteX2Manager
// module for further processing and redirection to the intended submodule
// of the LTE/NR protocol stack.
//
simple X2AppClient extends SctpClient
{
    parameters:
        @class("X2AppClient");
        string binderModule = default("binder");
        connectPort @mutable = default(5000); // it will be overwritten by the initialization procedure
        startTime = default(0s);
    gates:
        output x2ManagerOut @labels(X2Msg);
}

File: src/x2/X2AppClient.ned

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