Abstract: A communication control method according to an embodiment is a communication control method used in a mobile communication system providing a multicast broadcast service (MBS) from a base station to a user equipment. The communication control method includes, by the user equipment, specifying a broadcast session among MBS sessions in which the user equipment is interested, the broadcast session being an MBS session transmitted in a broadcast manner, and, by the user equipment, transmitting, to the base station, an MBS interest notification including identification information identifying the broadcast session specified.

Abstract: In an aspect, a communication control method is used in a cellular communication system. The communication control method includes receiving, by a relay node, a recovery attempt notification from a first parent node of the relay node. The recovery attempt notification indicates that the first parent node is attempting to recover from a failure having occurred in a backhaul link between the first parent node and a node that is a further parent node of the first parent node. The communication control method includes forwarding, by the relay node in response to reception of the recovery attempt notification, a first packet received from the first parent node to a child node of the relay node and a second packet received from the child node to a second parent node that is a parent node of the relay node.

Abstract: In a first aspect, a communication control method is used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to a user equipment, the communication control method including: broadcasting, by a base station, an MBS system information block; and transmitting, by the base station, scheduling information of an MBS traffic channel on an MBS control channel, in which the MBS system information block includes a search space identifier for a user equipment to receive the MBS control channel, and the search space identifier indicates a search space that is a resource range to be decoded by the user equipment in a physical downlink control channel associated with the MBS control channel.

Abstract: In an aspect, a communication control method is a communication control method performed by a relay node. The communication control method includes measuring, by the relay node, a delay time until untransmitted data to be transmitted to a parent node of the relay node via a logical channel is transferred to the relay node. The communication control method includes allocating, by the relay node, a resource for data transmission to the logical channel, based on the delay time.

Abstract: A communication control method according to an embodiment is a communication control method used in a mobile communication system providing a multicast broadcast service (MBS) from a base station to a user equipment. The communication control method includes, by the user equipment, transmitting predetermined information to the base station in a random access procedure. The predetermined information indicates that the user equipment accesses the base station and thus receives multicast data from the base station.

Abstract: A relay user equipment (UE) device transmits data received from a source UE device to a destination device. In response to determining that the data was not successfully received at the destination device, the relay UE device transmits a hybrid automatic repeat request (HARQ) NACK message to the source UE device indicating the data was not successfully received at the destination UE device. The relay UE device transmits the HARQ NACK message even when the data was successfully received at the relay UE device form the source UE device.

Abstract: In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes transmitting, by a donor base station with a first relay node and a second relay node as lower nodes of the donor base station, a trigger type for a pre-emptive buffer status report (pre-emptive BSR) to the second relay node being a parent node of the first relay node. The communication control method includes triggering, by the first relay node, the pre-emptive buffer status report to the second relay node in accordance with the trigger type.

Abstract: In a first aspect, a communication control method is a method used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to a user equipment. The communication control method includes receiving, by the user equipment, MBS data transmitted from the base station through a transmission scheme of either PTP transmission or PTM transmission; and transmitting, by the user equipment in response to switching of the transmission scheme between the PTP transmission and the PTM transmission, a message to the base station. The message includes information indicating a sequence number of a received packet related to the switching.

Abstract: A relay user equipment (UE) device transmits selected system information in a PC5 groupcast message, where the selected system information is a subset of system information received from a cell at the relay UE device. A remote UE device receiving the PC5 groupcast message with the selected system information obtains at least system information for accessing the cell where such system information may not be available directly from the cell. The remote UE device manages relay selection/reselection at least partially based on the selected system information.

Abstract: A remote user equipment (UE) device manages relay reselection using a plurality of quality thresholds. In one example, when a current communication route from the remote UE device to a communication device through a first relay UE device includes a first sidelink PCS link that has quality less than a preferred quality threshold, the remote UE device evaluates candidate relay UE devices. The remote UE device selects the second relay UE device where the candidate relay UE device provides a communication route with a second sidelink PCS link with a quality greater than the preferred quality threshold and where the quality of the first sidelink PCS link is below a minimum quality threshold and the second sidelink PCS link has a quality above the minimum quality threshold. Otherwise, the remote UE device continues to communicate over the first communication route through the first relay UE device.

Abstract: An origination device transmits a “received data signal” to a signal forwarding device. The “received data signal” comprises a first set of data. The origination device also transmits at least one “received control signal” to the signal forwarding device and to a destination device. The at least one “received control signal” comprises a first set of control information and a second set of control information. The first and second sets of control information are both associated with the first set of data. The first set of control information contains instructions pertaining to the signal forwarding device processing the first set of data. The second set of control information contains instructions pertaining to the destination device processing the first set of data. The signal forwarding device transmits a “forwarded signal” to the destination device. The “forwarded signal” contains forwarded data, based on the first set of data.

Abstract: Handovers in a New Radio-Unlicensed Standalone (NR-U SA) communication system are managed by invoking one of a plurality of handover procedures based on conditions related to the communication device and channel status. One example of one of the plurality of handover procedures includes providing a conditional handover command associated with a handover time period established by the serving gNB. After determining an unlicensed channel is unoccupied, the UE device transmits a measurement report over the unlicensed channel to the serving gNB. The serving gNB transmits the conditional handover command associated with the handover time period.

Abstract: A peer user equipment (UE) device maintains an existing Sidelink Radio Bearer (SLRB) configuration to support a first PC5 Radio Resource Control (RRC) sidelink (SL) communication link with a source UE device. The peer UE device receives a request to establish a second PC5 RRC SL communication link with the source UE device and determines that the existing SLRB configuration is required to support the second PC5 RRC SL communication link. The peer UE device releases the first PC5 RRC SL communication link.

Abstract: In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes performing, by a donor base station including a relay node as a subordinate, configuration whether the relay node causes a scheduler of the relay node to perform priority control in data packet transfer. The communication control method includes causing, by the relay node, the scheduler to operate in accordance with the configuration.

Abstract: A neighboring cell determines that uplink interference from an unmanned aerial vehicle (UAV) exceeds a first threshold at the neighboring cell. The neighboring cell transmits an uplink interference indicator to the UAV. In some examples, the UAV informs its serving cell of the uplink interference experienced by the neighboring cell. The serving cell can utilize information received from the UAV to make handover decisions or scheduling decisions for the UAV that caused the uplink interference. In other examples, the UAV can temporarily refrain from transmitting on at least some of its uplink resources or utilize different uplink resources for uplink data transmissions. In still other examples, the UAV can utilize downlink measurements to select which neighboring base station System Information Block messages should be monitored for an uplink interference indicator.

Abstract: A communication control method according to an embodiment is a method used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to a user equipment. The communication control method includes transmitting, by the base station to the user equipment, switching information for switching a delivery mode between a first mode in which an MBS configuration is provided through dedicated signaling and a second mode in which the MBS configuration is provided through broadcast signaling; and performing, by the user equipment having received the switching information, mode switching between the first mode and the second mode based on the switching information.

Abstract: The methods and systems discussed herein describe a first wireless communication device receiving reservation signals from two other wireless communication devices, each reservation signal identifying one or more time-slots reserved for data transmissions and a data priority level associated with the data transmissions. When the first wireless communication device determines that the reservation signals have at least one common identified time-slot, the first wireless communication device transmits a forwarded reservation signal, which identifies the time-slots reserved by the wireless communication device with the higher data priority level, to the wireless communication device with a lower data priority level. The wireless communication device that receives the forwarded reservation signal determines whether to transmit data during the time-slots identified in the forwarded reservation signal.

Abstract: A relay user equipment (UE) device transmits, to a base station, a first Multimedia Broadcast Multicast Service (MBMS) Interest Indication message, which includes information indicating that the relay UE device is operating in a relay mode on behalf of a remote UE device. In response to the MBMS Interest Indication message, the base station provides broadcast/multicast information to the remote UE device via the relay UE device. In some cases, control information is provided to the remote UE device via the relay UE device. In other cases, an MBMS service of interest is provided to the remote UE device via the relay device. The manner in which the broadcast/multicast information is delivered can be determined by the remote UE device or the relay UE device.

Abstract: A communication control method according to an embodiment is a communication control method used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to a user equipment, the communication control method including transmitting, by the base station through broadcast signaling, an MBS configuration including at least information used for reception of a broadcast session; and transmitting, by the base station to the user equipment in a Radio Resource Control (RRC) connected state, at least a part of the MBS configuration through dedicated signaling.

Abstract: A communication control method according to an embodiment is a method performed by a user equipment in a mobile communication system for providing a multicast broadcast service (MBS). The communication control method includes receiving, by the user equipment in a Radio Resource Control (RRC) connected state from a base station, an RRC message including an MBS configuration used for MBS reception; and performing, by the user equipment having transitioned from the RRC connected state to an RRC idle state or an RRC inactive state, the MBS reception by using the MBS configuration received when in the RRC connected state. The RRC message is an RRC Reconfiguration message or an RRC Release message.