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

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the 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
display	i=block/control
class	ConnectionControlEnbD2D

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

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