Abstract: A base station transmits a Radio Resource Control (RRC) Reconfiguration message to a remote user equipment (UE) device to initiate a path switch from direct communication with the remote UE device to indirect communication through a relay UE device. The relay UE device is an RRC connection state other than RRC Connected (RRC CONN) when the path switch is initiated. The remote UE device transmits an RRC Reconfiguration Complete message to the base station through the relay UE device. In response to receiving the RRC Reconfiguration Complete message, the relay UE performs RRC Connection Establishment with the base station when the relay UE device is in an RRC IDLE state and performs RRC Resume with the base station when the relay UE device is in an RRC INACTIVE state. The relay UE device transmits the RRC Reconfiguration Complete message to the base station.

Abstract: The devices, systems, and methods discussed herein include a first user equipment (UE) device receiving, from a base station, discovery resource pool configuration information indicating that a first discovery resource pool is associated with a first type of discovery transmission and that a second discovery resource pool is associated with a second type of discovery transmission. The first UE device selects the first discovery resource pool for communication via the first type of discovery transmission and selects the second discovery resource pool for communication via the second type of discovery transmission.

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: In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes receiving, by a relay node, a flow control feedback message or a failure occurrence notification message from a parent node of the relay node. The communication control method includes executing, by the relay node, a conditional handover in response to a certain period elapsing after receiving the flow control feedback message or the failure occurrence notification message.

Abstract: A donor node comprises a transmitter configured to transmit, to another donor node, a request message for migration of relay node traffic between the donor node and the other donor node; and a receiver configured to receive, from the other donor node, a response message in response to the request message, the response message including information relating to a routing configuration. The transmitter is configured to transmit the information relating to the routing configuration to a relay node subordinate to the donor node, the receiver is configured to receive, from the other donor node, a packet transmitted from the relay node to the other donor node, and the transmitter is configured to transmit the packet to a network.

Abstract: A communication control method is performed by a user equipment in a mobile communication system providing a multicast broadcast service (MBS). The communication control method comprises receiving, by the user equipment, from a network node, an MBS configuration including information used for reception of an MBS session, through a radio resource control (RRC) release message; and receiving, by the user equipment, from the network node, a modification of the MBS configuration through a multicast control channel (MCCH) related to the MBS session, when the user equipment is in an RRC inactive state and the MBS configuration is updated.

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: A communication control method used in a cellular communication system includes determining, by a remote user equipment having sidelink connection with a relay user equipment, a network communication state between the remote user equipment and a cellular communication network, and performing, by the remote user equipment, control related to sidelink communication between the remote user equipment and the relay user equipment, based on the network communication state.

Abstract: The devices, systems, and methods discussed herein include a first user equipment (UE) device receiving, from a base station, discovery resource pool selection criteria prioritizing a first discovery resource pool over a second discovery resource pool. The first UE device senses whether a congestion level of the first discovery resource pool is above a threshold. When the congestion level of the first discovery resource pool is equal to or less than the threshold, the first UE device selects the first discovery resource pool for discovery transmissions. When the congestion level of the first discovery resource pool is above the threshold, the first UE device selects the second discovery resource pool for discovery transmissions.

Abstract: In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes configuring, by a donor node including a first relay node and a second relay node being a parent node of the first relay node, the first relay node using correspondence information representing a correspondence relationship between a hop count of a logical channel (LCH) and a logical channel group (LCG), the first relay node and the second relay node being subordinate to the donor node. The communication control method includes transmitting, by the first relay node, a buffer status report (BSR) to the second relay node, based on the correspondence information. The communication control method further includes transmitting, by the second relay node, an uplink grant (UL grant) to the first relay node, based on the correspondence information and the buffer status report.

Abstract: The examples set forth herein are directed towards scenarios in which a minimum sidelink quality threshold level is used to determine whether a destination UE device is reachable by a relay UE device. The relay UE device transmits, to a source/remote UE device, a discovery message containing a list of destination UE devices that each have a communication link with the relay UE device with a quality level that meets or exceeds the minimum sidelink quality threshold level. Additional information can be included in the discovery message to improve the relay selection/reselection process.

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 communication control method comprises receiving, by a relay node, a flow control feedback message from a child node of the relay node; and determining, by the relay node, whether to perform local rerouting to transfer a data packet to an alternative path different from a path to the child node based on specified information included in the flow control feedback message. A relay node comprises transceiver circuitry and processing circuitry operatively associated with the transceiver circuitry and configured to execute processing of receiving a flow control feedback message from a child node of the relay node; and determining whether to perform local rerouting to transfer a data packet to an alternative path different from a path to the child node based on specified information included in the flow control feedback message.

Abstract: A communication control method according to a first aspect is a communication control method used in a cellular communication system. The communication control method includes transmitting, by a relay node that detects occurrence of a failure in a backhaul link between the relay node and a parent node of the relay node, a notification instructing execution of a conditional handover, and receiving, by a communication apparatus, the notification.

Abstract: Methods, apparatuses and systems for user equipment channel estimation, in accordance with some embodiments, includes: accessing a database storing a first plurality of locations, a first plurality of channels associated with respective ones of the first plurality of locations, and a first plurality of channel estimates associated with respective ones of the first plurality of channels; obtaining a second location of a first wireless communication device; determining a closest location from among the first plurality locations that has a closest distance to the second location; selecting a channel estimate from among the first plurality of channel estimates that corresponds to the closest location; determining a second channel estimate for the first wireless communication device based on the selected channel estimate; and adjusting at least one parameter of a signal transmitted between the first wireless communication node and the first wireless communication device based on the second channel estimate.

Abstract: The devices, systems, and methods described herein are directed to a procedure for automatically switching which cell serves as the Primary Cell (PCell) for a user equipment (UE) device connected to a network via two different communication paths. In some examples, the PCell transmits a message to the remote UE device, indicating one or more conditions that will trigger automatically switching from using a first cell as the PCell to using a second cell as the PCell. In response to one or more of the conditions that will trigger automatically switching being met, a procedure is performed to automatically switch from using the first cell as the PCell to using the second cell as the PCell. In some examples, the remote UE device will transmit a report to the PCell, indicating that one or more of the conditions that will trigger automatically switching has been met.

Abstract: The base station selects and instructs a reporting UE device to provide wide-beam precoder information indicative of a wide-beam precoder (W1). The base station tracks the locations of the reporting UE device and other UE devices and identifies at least one cluster UE device that is within a maximum distance from the reporting UE device. Without receiving wide-beam procedure information from the at least one cluster UE device, the base station applies a MU-MIMO precoder to transmissions through multiple antennas to the cluster UE device where the MU-MIMO precoder uses a wide-beam precoder (W1) based, at least partially, on the wide-beam precoder information received from the reporting UE device.

Abstract: A communication control method according to the first aspect is a method of using a relay apparatus configured to relay communication between an upper apparatus and a lower apparatus by radio. The communication control method includes a step of, in the relay apparatus, reporting, by a user equipment function unit connecting to the upper apparatus by radio, state information to a base station function unit connecting to the lower apparatus by radio. The state information is information indicating at least one state of an RRC state of the user equipment function unit or a radio link state between the upper apparatus and the user equipment function unit.

Abstract: Methods, apparatus and systems for user equipment positioning based on intelligent reflection surface are described. In one embodiment, a method performed by a first wireless communication node, includes: transmitting a respective one of a plurality of first signals to each of a first plurality of wireless communication nodes; transmitting a second signal to a wireless communication device, wherein the second signal comprises an indication to instruct the wireless communication device to reflect each of a plurality of third signals back towards a respective transmitting node using an Intelligent Reflecting Surface (IRS); transmitting a respective one of the plurality of third signals to the wireless communication device; and receiving a respective one of a plurality of first reports from a respective one of the first plurality of wireless communication nodes for positioning computation of the wireless communication device.

Abstract: A network node determines a location of a target terminal device and transmits a location-based CBL to the target terminal device. The location-based CBL comprises information identifying at least one reference signal. The target terminal device measures the at least one reference and conveys results of the measurements to the communication node. The network node applies a MU-MIMO precoder to transmissions through multiple antennas to the target terminal device where the MU-MIMO precoder is selected based, at least partially, on the results of the measurement of the at least one reference signal. In some embodiments, the location-based CBL is based, at least partially, on a precoder-to-region mapping comprising a plurality of region precoders mapped to a plurality of regions. The location-based CBL may further be based on the most recent precoder information received from a reporting neighbor terminal device that is within a maximum distance from the target terminal device.