ConnectionControlEnbD2D¶

simple module ConnectionControlEnbD2D

D2D-capable variant of the ConnectionControlEnb. It adds the sidelink bearers of the UEs the base station serves: a D2D unicast or multicast flow gets a bearer with a fixed transitional configuration (RLC UM on LCG 3), outside the bearer definition system; a multicast bearer’s TX leg is installed at the sender and an RX leg at each group member, and a node joining a group later gets the RX legs of the group’s known senders. The sidelink node pairs’ DRB identities and the established multicast flows are kept network-wide in the D2dBinder, since a sidelink bearer’s ends are UEs whose serving base stations may differ and change.

It also handles the D2D side of the handovers of the D2D-capable UE legs it serves (a leg reports the capability when it connects, and a handover carries it with the context): before commanding a leg’s handover, the leg’s D2D flows are switched back to infrastructure mode through the node’s D2dModeSelectionBase; a leg’s D2D direction is attached at the node’s AMC when it arrives, by handover or by attaching during the run, and a D2D mode re-selection follows at the end of that instant; and it is detached when the leg leaves.

Selected via ‘rrc.connectionControl.typename’ by the D2D-capable base station NICs.

Inheritance diagram¶

Extends¶

Name	Type	Description
ConnectionControlEnb	simple module	The control-plane entry point of a base station: the one module of the node that the control plane of other nodes – the CoreControl, the other base stations, and the UEs’ ConnectionControlUe – talks to, and that the node’s own data path turns to when it needs a bearer.

Parameters¶

Name	Type	Default value	Description
binderModule	string	“binder”
bearerConfiguratorModule	string	“bearerConfigurator”
coreControlModule	string	“coreControl”
bearerManagementModule	string	“^.bearerManagement”
macModule	string	“^.^.mac”
handoverPacketHolderModule	string	“^.^.handoverPacketHolder”
gtpUserModule	string	“^.^.^.relay.gtpUser”
gtpUserX2Module	string	“^.^.^.gtpUserX2”
macNodeId	int		The base station’s node id; the NIC sets it from the node’s
gateway	string	“”	The node’s core network gateway, as its gateway parameter names it; ignored at a node not connected to a core network (a secondary node)
d2dBinderModule	string	“d2dBinder”	The network’s D2dBinder, which holds the D2D state
d2dModeSelectionModule	string	“^.d2dModeSelection”	The node’s D2D mode selection; none if the module does not exist

Properties¶

Name	Value	Description
class	ConnectionControlEnbD2D
display	i=block/control

Source code¶

//
// D2D-capable variant of the ~ConnectionControlEnb. It adds the sidelink bearers of
// the UEs the base station serves: a D2D unicast or multicast flow gets a bearer
// with a fixed transitional configuration (RLC UM on LCG 3), outside the bearer
// definition system; a multicast bearer's TX leg is installed at the sender and an
// RX leg at each group member, and a node joining a group later gets the RX legs of
// the group's known senders. The sidelink node pairs' DRB identities and the
// established multicast flows are kept network-wide in the ~D2dBinder, since a
// sidelink bearer's ends are UEs whose serving base stations may differ and change.
//
// It also handles the D2D side of the handovers of the D2D-capable UE legs it
// serves (a leg reports the capability when it connects, and a handover carries it
// with the context): before commanding a leg's handover, the leg's D2D flows are
// switched back to infrastructure mode through the node's ~D2dModeSelectionBase;
// a leg's D2D direction is attached at the node's AMC when it arrives, by handover
// or by attaching during the run, and a D2D mode re-selection follows at the end
// of that instant; and it is detached when the leg leaves.
//
// Selected via 'rrc.connectionControl.typename' by the D2D-capable base station NICs.
//
simple ConnectionControlEnbD2D extends ConnectionControlEnb
{
    parameters:
        @class(ConnectionControlEnbD2D);
        string d2dBinderModule = default("d2dBinder");  // The network's ~D2dBinder, which holds the D2D state
        string d2dModeSelectionModule = default("^.d2dModeSelection");  // The node's D2D mode selection; none if the module does not exist
}

File: src/simu5g/stack/d2d/rrc/ConnectionControlEnbD2D.ned