Abstract: In the event that a first user equipment (UE) device is unable to decode a packet received from a base station that provides Point-to-Multipoint (PTM) compatible services to UE devices within a service area (e.g., cell) of the base station, the first UE device transmits a request for retransmission of the packet. In one example, the request for retransmission is transmitted to one or more neighboring UE devices via a device-to-device (D2D) transmission. In response to the request for retransmission, one or more of the neighboring UE devices, which were able to successfully decode the same packet, retransmit the packet to the first UE device via a D2D communication link.

Abstract: The methods, devices, and systems discussed herein define sidelink interface (e.g. PCS) states for a unicast connection between two wireless communication devices. A Sidelink-CONNECTED state is a sidelink interface state in which a first wireless communication device establishes and maintains a sidelink channel connection with a second wireless communication device. The first and second wireless communication devices can transmit sidelink unicast transmissions to each other over the sidelink channel connection while operating in the Sidelink-CONNECTED state. A non-Sidelink-CONNECTED state is a sidelink interface state other than the Sidelink-CONNECTED state. The first and second wireless communication devices transition from the Sidelink-CONNECTED state to the non-Sidelink-CONNECTED state upon the occurrence of a triggering event such as a Radio Link Failure.

Abstract: A set of neighboring base stations coordinate to simultaneously transmit a common resynchronization signal via a Common Synchronization Channel (CSCH). The common resynchronization signal is transmitted from the base stations utilizing a common sequence and a common set of time/frequency resources. A user equipment (UE) device receives the common resynchronization signals from a plurality of the base stations and combines the received common resynchronization signals. In some examples, the UE device coherently combines the received common resynchronization signals. Once the received signal strength of the combined received common resynchronization signals exceeds a threshold level, the UE device utilizes the combined received common resynchronization signals to obtain resynchronization.

Abstract: Communication equipment communicating in a licensed frequency band identifies unused unlicensed communication resources within an unlicensed frequency band. The communication equipment uses the identified unlicensed communication resources to communicate within the unlicensed frequency band. In some circumstances, the unused unlicensed communication resources are identified based on resource information received from a base station where the resource information identifies unlicensed communication resources that will be used by the base station. In other circumstances, the unused unlicensed communication resources are identified based on frequency band measurements of the unlicensed frequency band over an observation time duration longer than a sensing time duration used by unlicensed equipment using the unlicensed frequency band.

Abstract: A relay node receives a data block containing multiplexed data streams intended for multiple user equipment (UE) devices being served by the relay node. The relay node extracts the data streams from the data block and allocates them each to a separate narrowband channel that is associated with a particular UE device. The relay node repeatedly transmits the narrowband channels to the UE devices in a broadcast transmission that is transmitted for a predetermined number of repetitions. Each UE device decodes their own respective narrowband channel to obtain the data stream intended for the UE device associated with a particular narrowband channel. A feedback mechanism is utilized by the relay node to determine whether to retransmit a data packet or a new data packet in subsequent broadcast transmissions.

Abstract: In order to improve the wake-up signal (WUS) detection performance for MTC UE devices, a set of neighboring base stations coordinate to simultaneously transmit a common wake-up signal (CWUS). The CWUS is transmitted from the base stations utilizing a common set of time/frequency resources. A user equipment (UE) device receives the CWUSs from a plurality of the base stations and combines the received CWUSs. In some examples, the UE device coherently combines the received CWUSs. The UE device utilizes the combined CWUSs to determine when the UE device may skip monitoring of the Paging Occasions within a Paging Time Window (PTW) to conserve power.

Abstract: A relay node receives a data block containing multiplexed data streams intended for multiple user equipment (UE) devices being served by the relay node. The relay node extracts the data streams from the data block and allocates them each to a separate narrowband channel that is associated with a particular UE device. The relay node repeatedly transmits the narrowband channels to the UE devices in a broadcast transmission that is transmitted for a predetermined number of repetitions. Each UE device decodes their own respective narrowband channel to obtain the data stream intended for the UE device associated with a particular narrowband channel. A feedback mechanism is utilized by the relay node to determine whether to retransmit a data packet or a new data packet in subsequent broadcast transmissions.

Abstract: A User Equipment (UE) D2D device transmits a coverage transition indicator when the UE device leaves a service area of base station and is no longer in coverage. The coverage transition indicator at least indicates that the UE device has left the service area and is no longer in coverage. Based on the coverage transition indicator, a determination can be made as to whether the D2D group to which the UE device belongs has transitioned to an out of coverage scenario from a partial coverage scenario.

Abstract: A set of neighboring base stations coordinate to transmit a cell-specific common resynchronization signal via a Common Synchronization Channel (CSCH). At least one neighboring base station transmits the cell-specific common resynchronization signal by a timing advance value before a serving base station transmits the cell-specific common resynchronization signal. A user equipment (UE) device receives the cell-specific common resynchronization signals from the base stations and combines the received cell-specific common resynchronization signals. In some examples, the UE device coherently combines the received cell-specific common resynchronization signals. Once the received signal strength of the combined received cell-specific common resynchronization signals exceeds a threshold level, the UE device utilizes the combined received cell-specific common resynchronization signals to obtain resynchronization.

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 serving base station allocates communication resources to be used by an aerial vehicle user equipment device (AV-UE) for uplink data transmissions. A neighboring base station is informed, via an air interface, of the communication resources that were allocated to the AV-UE. In some examples, the AV-UE retransmits scheduling assignment information, received from the serving base station, to the neighboring base station. In still other examples, the AV-UE transmits a sounding reference signal (SRS) to the neighboring base station. The neighboring base station can decode the retransmitted scheduling assignment information and/or the SRS to obtain information regarding the communication resources that have been allocated to the AV-UE for uplink data transmissions. The neighboring base station mitigates interference from the uplink data transmissions sent by the AV-UE.

Abstract: A wireless communication device transmits a device beacon in accordance with a system timing of a wireless wide area network (WWAN). For one example, the beacon is transmitted relative to WWAN uplink channels of the time-frequency space of the uplink WWAN channel assignment. In response to the reception of the device beacon by another wireless communication device, a peer to peer communication session is established.

Abstract: A base station transmits a transmission signal to a first device and a second device where the transmission signal includes time-frequency resources using different numerologies and conveys first data to the first device and second data to the second device and common geographic location dependent control information to both devices. The transmission comprises a first set of time-frequency resources having a first numerology and a second set of time-frequency resources having a second numerology. The first data is transmitted over the first set of time-frequency resources and the common geographic location dependent control information is transmitted over the second set of time-frequency resources.

Abstract: In a communication system having a plurality of user equipment (UE) devices that are operating in a contention based mode for device-to-device (D2D) communication, each UE device transmits a preferred transmission indicator when a condition for preferred transmission is met at the UE device. If a UE device receives a preferred transmission indicator, the UE device delays transmission of a D2D scheduling assignment (SA) to contend for communication resources for D2D communication. The length of the delay can be based on a number of preferred transmission indicators that are received. The preferred transmission indicator is based on a buffer size in one example.

Abstract: A downlink signal is received at an origination device (e.g., a user equipment (UE) device). In response to receiving the downlink signal, the origination device transmits an uplink signal to a signal forwarding device. The uplink signal received, at the signal forwarding device, from the origination device is a “received signal,” which contains a destination identifier. The signal forwarding device transmits a “forwarded signal” to a destination associated with the destination identifier. The “forwarded signal” is based on the contents of the “received signal” and/or any information that may be ascertained from the “received signal.” The received signal may also contain a downlink channel feedback report and/or an acknowledgment response. Based on the forwarded signal, a signal forwarding scheme may be selected.

Abstract: A first wireless communication device receives device-to-device (D2D) control information from a base station in a cellular communication system and sends second device D2D control data to a second wireless communication device. The second device control data is used for D2D communication over a D2D communication link between the first wireless communication device and the second wireless communication device. The second device D2D control data is at least partially based on the D2D control information.

Abstract: The methods, devices, and systems discussed herein describe a wireless communication device transmitting a discovery channel message, at least a portion of which, is embedded in the control channel of a groupcast transmission. In some examples, the discovery channel message is transmitted using a pre-defined, fixed transmit power and modulation and coding scheme (MCS), which facilitates the receiving wireless communication devices' ability to decode the control channel, including the embedded discovery channel message. If a receiving wireless communication device can decode the discovery channel message above a configured threshold (e.g.

Abstract: The methods and systems discussed herein describe a first wireless communication device forwarding a first reservation signal, which identifies one or more time-slots that have been reserved by a second wireless communication device, to avoid “merging collisions.” In some examples, the first wireless communication device also receives a second reservation signal from a third wireless communication device, which identifies at least one time-slot that is the same as a time-slot that was identified in the first reservation signal. The first wireless communication device transmits a forwarded reservation signal that identifies the time-slots reserved by whichever of the second wireless communication device and the third wireless communication device has higher priority data to transmit. In other examples, the first wireless communication device transmits the forwarded reservation signal if a received power value of the first reservation signal is within a pre-defined received power range.

Abstract: In a communication system having a plurality of user equipment (UE) devices that are operating in a contention based mode for device-to-device (D2D) communication, each UE device transmits a preferred transmission indicator when a condition for preferred transmission is met at the UE device. If a UE device receives a preferred transmission indicator, the UE device delays transmission of a D2D scheduling assignment (SA) to contend for communication resources for D2D communication. The length of the delay can be based on a number of preferred transmission indicators that are received. The preferred transmission indicator is based on a buffer size in one example.

Abstract: An unmanned aerial vehicle (UAV) calculates an estimated uplink interference caused by the UAV at a neighboring cell based on a downlink signal received from the neighboring cell. Based on the estimated uplink interference, the UAV monitors downlink messages transmitted from the neighboring cell. If the uplink interference experienced by the neighboring cell exceeds an interference threshold, the neighboring cell transmits a downlink message, which includes an uplink interference indicator, to the UAV. Upon receipt of the uplink interference indicator, the UAV transmits a measurement report, including the uplink interference indicator, to the serving cell. In some cases, the serving cell transmits a handover command to the UAV based at least partially on the measurement report. The serving cell may also maintain a mobility history for the neighboring cell. The mobility history indicates a history of uplink interference problems and/or UAV handover availability for the neighboring cell.