Abstract: A communications network may include user equipment (UE) devices. When a first UE device becomes off-grid and has an emergency message, the first UE device may transmit device-to-device signals for receipt by a second UE device. The signals may include one or more preambles that precede the emergency message and that are used by the second UE device to perform synchronization with the first UE device. The second UE device may periodically activate a receiver during a series of windows to listen for the signals, may receive a preamble sequence during one of the windows, and may synchronize its timing to the first UE device for receipt of the emergency message based on the preamble sequence. This may allow the UE devices to be synchronized for transfer of the emergency message over long distances while consuming a minimal amount of power on the second UE device.

Abstract: A user equipment (UE) device may communicate with a wireless access point (AP) via reflection off a reconfigurable intelligent surface (RIS). The RIS may begin to sweep antenna elements over one or more sets of signal beams beginning at an initial time while reflecting signals transmitted by the AP. The UE may record times at which the UE receives reference signals reflected by the RIS. The UE may select an optimal signal beam of the RIS based on the time periods between the initial time and the times at which the reference signals were received. The UE may inform the AP of the optimal signal beam and the RIS may use the optimal signal beam to reflect wireless data between the AP and the UE. Multiple signal beam sweeps may eliminate uncertainty or ambiguity in signal beam selection associated with timing drift or offsets between the RIS and the UE.

Abstract: A wireless access point (AP) may communicate with a user equipment (UE) device via reflection off a reflective device having an array of fixed or adjustable reflectors in different orientations. The AP may illuminate different portions of an area by pointing a signal beam to different reflectors and/or by controlling the reflective device to electrically rotate the reflectors. The AP may calibrate the position of the reflective device and may establish wireless communications with the UE device by performing a sweep of signal beams over the reflectors and/or by controlling the reflective device to sweep over different reflector orientations. The AP may track movement of the UE device over time. The AP may sweep the AP beam over a subset of the reflectors around an active reflector to maintain communications with the UE device even as the UE device moves over time.

Abstract: A wireless access point (AP) may communicate with a user equipment (UE) device via reflection off a reflective device having an array of fixed or adjustable reflectors in different orientations. The AP may illuminate different portions of an area by pointing a signal beam to different reflectors and/or by controlling the reflective device to electrically rotate the reflectors. The AP may calibrate the position of the reflective device and may establish wireless communications with the UE device by performing a sweep of signal beams over the reflectors and/or by controlling the reflective device to sweep over different reflector orientations. The AP may track movement of the UE device over time. The AP may sweep the AP beam over a subset of the reflectors around an active reflector to maintain communications with the UE device even as the UE device moves over time.

Abstract: A controller may map user equipment (UE) devices in a wireless system to access points (AP) and reflective intelligent surfaces (RIS). The controller may generate a corresponding communications schedule based on the locations of the UE device(s), AP(s), and RIS(s) and based on current traffic demands. The controller may control the RIS(s), AP(s), and UE devices to implement the schedule. The schedule may divide the time, frequency, and/or spatial resources of the RIS(s) to meet the traffic demands of the UE devices using a space division multiple access scheme, a time-division multiple access scheme, a frequency-division multiple access scheme, and/or a distributed multiple-input and multiple output scheme. The schedule may be updated over time as needed. The RIS(s) may allow for a reduction in the number of AP(s) required to meet the dynamic demands of the UE devices, thereby minimizing deployment and operating costs.

Abstract: A user equipment (UE) device may communicate with a wireless access point (AP) using wireless signals transmitted using a data radio access technology (RAT) via reflection off a reconfigurable intelligent surface (RIS) at frequencies greater than about 100 GHz. A control RAT may be used to convey control signals between the AP, UE device, and RIS. The control signals and the control RAT and the data transfer RAT may split procedures used to perform discovery, to establish an initial configuration of the UE device, AP, and/or RIS, and to update the configuration of the UE device, the AP, and/or the RIS while tracking the UE device over time. The control RAT may allow for control operations without requiring line-of-sight and may allow the RIS to minimize its power consumption and cost.

Abstract: A user equipment (UE) device may communicate with an access point (AP) at greater than 100 GHz via a reconfigurable intelligent surface (RIS). The AP may perform a control RAT discovery with the RIS and then a data transfer RAT discovery, during which the AP uses the control RAT to control the RIS to sweep over different RIS beams. The AP may transmit radar waveforms while concurrently sweeping over different AP beams. The AP may gather performance metric values from the radar waveforms after reflection off the RIS during the sweep. The AP may identify an optimal RIS beam that produced the best performance metric values. The AP may use the optimal RIS beam to identify the orientation of the RIS, which the AP may use to select AP and/or RIS beams for conveying wireless data between the AP and the UE via the RIS.

Abstract: A user equipment (UE) device may communicate with an access point (AP) at greater than 100 GHz via a reconfigurable intelligent surface. The UE may select tracking beams based on sensor data. The UE may instruct the RIS to sweep over the tracking beams while the UE gathers performance metric data. The UE may identify a serving beam based on the performance metric data. The UE may control the RIS to form the serving beam to reflect wireless data between the AP and the UE. Using the UE to intelligently select tracking beams based on sensor data may greatly reduce the amount of time required to track the UE device as it moves relative to sweeping over all formable signal beams, thereby reducing latency and minimizing disruptions in wireless data transfer between the UE device and the AP.

Abstract: A communications network may include user equipment (UE) devices. When a first UE device becomes off-grid and has an emergency message, the first UE device may transmit device-to-device signals for receipt by a second UE device. The signals may include one or more preambles that precede the emergency message and that are used by the second UE device to perform synchronization with the first UE device. The second UE device may periodically activate a receiver during a series of windows to listen for the signals, may receive a preamble sequence during one of the windows, and may synchronize its timing to the first UE device for receipt of the emergency message based on the preamble sequence. This may allow the UE devices to be synchronized for transfer of the emergency message over long distances while consuming a minimal amount of power on the second UE device.

Abstract: Methods and devices configured to perform wireless communications, the methods and devices configured to monitor a frequency band for one or more other Radio Access Technologies (RATs); determine one or more periods of a reduced interference with the one or more other RATs in one or more frequencies of the monitored frequency band; and communicate a first signal during the one or more periods in the more or more frequencies, and communicate a second signal in the frequency band based on the communication of the first signal.

Abstract: A wireless device includes a radio transceiver, and a digital transmitter configured to transmit, via the radio transceiver, a first data symbol, and to transmit, via the radio transceiver, a repetition of the first data symbol immediately after the first data symbol, where the first data symbol forms a cyclic prefix for the repetition of the first data symbol.

Abstract: A terminal device includes a controller configured to identify a data hopping sequence for a first superframe including a plurality of frames, and a transceiver configured to switch hopping frequencies over the plurality of frames according to a data hopping sequence that excludes one or more hopping frequencies scheduled for use by a synchronization hopping sequence in one or more superframes immediately succeeding the first superframe.

Abstract: Technology for improving the selection, transfer, and storage of user equipment (UE) radio capability information is disclosed. A cellular mobile network can be configured to identify radio-access-technology (RAT)-specific radio-capability information relating to RATs supported in the cellular mobile network and communicate the RAT-specific radio-capability information to a UE. The UE can use the RAT-specific radio-capability information to help determine which UE radio capability information to send to the network. In addition, the UE may store a list of supported frequency bands and/or supported frequency-band combinations (LOSB) indexed by network operators and use the list to help determine which UE radio capability information to send to the network. A network node may also selectively remove unnecessary information from UE radio capability information before storing the UE radio capability information at a mobility management entity (MME).

Abstract: A method for controlling a bandwidth used for processing a baseband transmit signal by a transmit path of a transmitter is provided. The method includes generating a first comparison result by comparing, to a threshold value, a first number of physical resource blocks allocated to the transmitter for a first transmission time interval. Further, the method includes generating a second comparison result by comparing, to the threshold value, a second number of physical resource blocks allocated to the transmitter for a subsequent second transmission time interval. The method additionally includes adjusting the bandwidth based on the first and the second comparison results.

Abstract: A wireless device may include a selection processor configured to process selection information to set a duration of a selection period and to start the selection period, a receiver configured to receive a synchronization initiation signal, and a transmitter configured to transmit a synchronization initiation signal after the selection period has expired if the receiver has not received a synchronization initiation signal during the selection period.

Abstract: Technology for improving the selection, transfer, and storage of user equipment (UE) radio capability information is disclosed. A cellular mobile network can be configured to identify radio-access-technology (RAT)-specific radio-capability information relating to RATs supported in the cellular mobile network and communicate the RAT-specific radio-capability information to a UE. The UE can use the RAT-specific radio-capability information to help determine which UE radio capability information to send to the network. In addition, the UE may store a list of supported frequency bands and/or supported frequency-band combinations (LOSB) indexed by network operators and use the list to help determine which UE radio capability information to send to the network. A network node may also selectively remove unnecessary information from UE radio capability information before storing the UE radio capability information at a mobility management entity (MME).

Abstract: A wireless device may include a controller configured to identify an emergency scenario and to generate an emergency message including information about the emergency scenario, and a transmitter configured to transmit, on a discovery channel allocated for other wireless devices to perform discovery, an emergency indicator beacon that indicates an upcoming transmission of the emergency message, and to transmit the emergency message on a data channel of the wireless device.

Abstract: Methods and devices configured to perform wireless communications, the methods and devices configured to monitor a frequency band for one or more other Radio Access Technologies (RATs); determine one or more periods of a reduced interference with the one or more other RATs in one or more frequencies of the monitored frequency band; and communicate a first signal during the one or more periods in the more or more frequencies, and communicate a second signal in the frequency band based on the communication of the first signal.

Abstract: A wireless device includes a radio transceiver, and a digital transmitter configured to transmit, via the radio transceiver, a first data symbol, and to transmit, via the radio transceiver, a repetition of the first data symbol immediately after the first data symbol, where the first data symbol forms a cyclic prefix for the repetition of the first data symbol.

Abstract: A mobile communication device may include a storage element and a baseband processing component operatively coupled to the storage element. The baseband processing component may generate representations of one or more symbols, provide the representations of the one or more symbols through an interface to a buffer element to process, and reduce communications through the interface to the buffer element during at least a portion of the processing of the representations of the one or more symbols.