37 results about "Licensed spectrum" patented technology

User equipment and base stations are disclosed. The user equipment comprises a transceiver, at least one processor, and a memory storing instructions that cause the at least one processor to perform operations including receiving uplink scheduling information of a plurality of sub-bands, performing carrier sensing on each of the plurality of sub-bands, determining a transmission frequency band for the uplink transmission based on the carrier sensing, the transmission frequency band including at least one idle sub-band among the plurality of sub-bands that is free for transmission, processing a baseband signal according to a number of sub-bands included in the determined transmission frequency band, shifting a frequency of the processed baseband signal based on a center frequency of the transmission frequency band, generating an RF signal of the adjusted baseband signal, and performing the uplink transmission for the generated RF signal to the base station.

A method for physical sidelink feedback channel (PSFCH) transmission on a sidelink are provided. Transmission on the sidelink is performed over an unlicensed spectrum. The method includes: determining a listen before talk (LBT) type for transmitting multiple PSFCHs when the multiple PSFCHs are required to be transmitted over the unlicensed spectrum; and performing LBT according to the LBT type determined, and transmitting the multiple PSFCHs according to a sensing result.

Embodiments of the present disclosure relate to methods and apparatuses for sidelink synchronization signal block (S-SSB) transmission in unlicensed spectra. According to an embodiment of the present disclosure, a user equipment (UE) can include: a processor configured to: obtain configuration information for S-SSB in an unlicensed spectrum based on configuration or pre-configuration, wherein the configuration information includes condition (s) for determining a channel access failure prior to a target S-SSB occasion based on a listen before talk (LBT) type 1 procedure; perform a first LBT type 1 procedure associated with a first S-SSB occasion to initiate a first S-SSB channel occupancy starting from the first S-SSB occasion; and perform at least one of the following operations in response to determining a channel access failure prior to the first S-SSB occasion based on the first LBT type 1 procedure and the configuration information: performing a second LBT type 1 procedure associated with a second S-SSB occasion next to the first S-SSB occasion to initiate a second S-SSB channel occupancy starting from the second S-SSB occasion; continuing to perform the first LBT type 1 procedure prior to the second S-SSB occasion to initiate a second S-SSB channel occupancy starting from the second S-SSB occasion; or performing a first LBT type 2 procedure; a transmitter coupled to the processor and configured to transmit an S-SSB on the first S-SSB occasion in response to a channel being available for access prior to the first S-SSB occasion based on the first LBT type 1 procedure; and a receiver coupled to the processor.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive a channel occupancy time (COT) sharing indication from a second UE. The first UE may determine whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with aligning sidelink transmissions across a group of UEs and the second channel access type is associated with determining a transmission starting point for a sidelink communication based at least in part on a priority associated with the first UE. The first UE may attempt to transmit a sidelink communication at the transmission starting point. Numerous other aspects are described.

In summary, various aspects of this disclosure relate to wireless communications. In some aspects, a user equipment can receive information identifying a shared channel occupancy for packet transmission resources and a hopping counter value associated with the shared channel occupancy. The user equipment can determine, at least in part, whether to transmit one or more packets during shared channel occupancy based on the hopping counter value associated with the shared channel occupancy. Numerous other aspects are provided.

Systems, methods, and circuitries are provided for a UE performing sidelink (SL) communication in unlicensed spectrum to perform transmission resource selection. In one example, an apparatus for a user equipment (UE) operating in unlicensed spectrum is provided that includes one or more processors configured to cause the UE to receive configuration of pre-allocated resources in a plurality of sub-channels for sidelink (SL) communication; perform a clear sub-channel assessment (CCA) process in at least one of the plurality of sub-channels; determine a resource selection window comprising candidate resources in a subset of the pre-allocated resources; perform a resource selection process on the candidate resources in the resource selection window to determine transmission resources in at least two of the plurality of sub-channels; and based on results of the CCA process, transmit data using the transmission resources.

A system includes a radiofrequency identification (RFID) integrated circuit (IC) associated with a mobile asset. The 5GID-IC can store sensor data collected from sensors of the mobile asset and generate tracking data of the mobile asset based on that sensor data. The 5GID-IC responds to radiofrequency (RF) signals radiated on the RFID device, where the RF signals have frequencies in a licensed spectrum of a 5G telecommunications network. The system includes a reader device configured to independently check multiple 5GID-ICs of mobile assets for tracking data. The reader device includes a communications circuit that can retrieve the tracking data from the 5GID-IC of the mobile asset.

Methods and apparatuses for scheduling sidelink communications in unlicensed spectrum are disclosed. A method performed by a first wireless transmit / receive unit (WTRU) can include receiving, from a second WTRU that initiates a shared channel occupancy time (COT) with the first WTRU, sidelink control information (SCI), the SCI including: (1) COT information, the COT including an associated channel access priority class (CAPC) value, wherein the CAPC value has an integer value between 1 and 4; and (2) at least one of: (a) a source ID associated with the second WTRU or (b) a destination ID associated with the second WTRU; using the shared COT; performing a type 2 LBT procedure for transmission during the shared COT.

Certain aspects of the present disclosure provide a method for wireless communications by a transmitter UE. The method generally includes transmitting data to at least one receiver UE in an unlicensed spectrum used for sidelink communication, determining if a resource in a slot is available for the at least one receiver UE to provide acknowledgment feedback for the data transmission, and transmitting a reservation signal in the slot if the resource is determined to be available.

The application relates to the technical field of electric power communication, and discloses a digital converter station distributed fusion terminal time synchronization compensation method and device, which comprises the following steps: S1: according to the type of a service, priority of the service of a digital converter station is divided; S2: a preset routing and spectrum allocation algorithm is used to initialize a path and a time delay of the service after the priority is divided; S3: through adaptive setting of a to-be-forwarded waiting real-time delay in a pending node, differential compensation is carried out, time synchronization of a receiving end is realized, and a path and spectrum are reconstructed according to a minimized compensation routing spectrum; S4: whether there is a licensed spectrum slot is judged, if yes, step S5 is executed, and if not, step S2 is executed through re-routing; and S5: transmission delay of the service is recorded, and a blocking probability under a traffic load to which the service belongs is calculated. The method provided by the application guarantees time synchronization of a receiving end of a digital converter station, and has better performance in terms of transmission delay and blocking probability.

This application provides an LTE-U wireless signal sensing method and related equipment. This application addresses wireless interference monitoring and spectrum management systems in the complex electromagnetic environment of rail transit, deeply integrating licensed and unlicensed spectrum, known and unknown protocols, real-time sensing and long-term optimization. It provides a systematic solution for highly reliable vehicle-to-ground communication, effectively overcoming the licensed spectrum bottleneck. While retaining 1.8GHz LTE-M as the high-reliability main control channel, it intelligently aggregates unlicensed spectrum such as 5.8GHz as a secondary data channel through LTE-U technology. Without changing the spectrum allocation policy, it effectively increases the system's available bandwidth several times. Through envelope analysis and spectrum sensing, it can identify clean sub-bands in the unlicensed frequency band, effectively avoiding interference and maximizing spectrum utilization.

Methods and apparatuses are described herein for accessing an unlicensed spectrum using portions of a carrier's bandwidth (BW). For example, a wireless transmit receive unit (WTRU) may access a serving cell through an initial bandwidth part (BWP). The WTRU may be configured with a plurality of BWPs within an unlicensed frequency spectrum. The WTRU may then determine any of at least one monitoring period and at least one offset per each BWP. The WTRU may then monitor the BWPs based on any of the at least one monitoring period and the at least one offset. The WTRU may receive at least one signal from the serving cell. The signal may be at least one of a downlink control information (DCI), a synchronization signal block (SSB), a reference signal, or a preamble.

This application provides a communication method, apparatus, and computer-readable storage medium that can improve the utilization rate of IMT spectrum while ensuring the value of IMT licensed spectrum. The method includes: a network device determining that it and an access point device will conduct cooperative communication on the same frequency; and sending first information to the access point device, the first information instructing the network device and the access point device to conduct cooperative communication on the same frequency. Correspondingly, receiving the first information from the network device, the first information instructing the network device and the access point device to conduct cooperative communication on the same frequency; and determining, based on the first information, to conduct cooperative communication with the network device on the same frequency.

Embodiments of the present disclosure relate to methods and apparatuses for downlink and uplink transmission over an unlicensed spectrum. According to some embodiments of the disclosure, a method for wireless communications may include: determining a transport block (TB) to be transmitted on a plurality of consecutive slots; determining a set of candidate starting positions for transmitting the TB; and performing a channel access procedure for a candidate starting position from the set of candidate starting positions.

In one aspect, a method of wireless communication includes receiving, by a user equipment (UE), a sidelink transmission in a first slot of an unlicensed channel. The method also includes performing, by the UE, a Channel Access (CA) operation for a hybrid automatic repeat request (HARQ) feedback transmission in a second slot for the sidelink transmission, where the second slot is one of multiple slots configured for HARQ feedback for the sidelink transmission. The method further includes transmitting, by the UE, HARQ feedback transmission in the second slot based on successfully performing the CA operation. Other aspects and features are also claimed and described.

A method for sidelink (SL) communication in an unlicensed frequency spectrum includes receiving a configuration for a SL transmission, monitoring a hybrid automatic repeat request-acknowledgement (HARQ-ACK) response in a physical sidelink feedback channel (PSFCH) according to the configuration for the SL transmission, performing a listen-before-talk (LBT) operation to gain access to a channel according to the HARQ-ACK response, and performing the SL transmission after the LBT operation.

Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable media supporting efficient positioning reference signal detection for sidelink positioning in an unlicensed spectrum. A first terminal device in a radio access network may be configured to initiate a first listen before talk procedure before transmitting a sidelink positioning reference signal to a second terminal device in the radio access network in an unlicensed spectrum during a sidelink positioning session, transmit positioning related control information to the second terminal device in a licensed spectrum, and transmit the sidelink positioning reference signal in the unlicensed spectrum in response to the first listen before talk procedure ending successfully. The positioning related control information comprises an indication for the second terminal device to receive a notification of whether the first listen before talk procedure is successful or to perform a second listen before talk procedure.

Certain aspects of the present disclosure provide techniques for sidelink communication. One example method generally comprises identifying, by a wireless device, a frequency of a sidelink operation being unlicensed spectrum. The wireless device may detect whether a synchronization signal is on one or more carriers overlapping with the frequency, and in response to the detection, determine whether to enable the sidelink operation in the frequency. The wireless device may send an indication of whether the sidelink operation is enabled based on the determination.

Examples pertaining to power control of sidelink (SL) on unlicensed spectrum (SL-U) in mobile communications are described. A user equipment (UE) communicates in a SL-U. The UE performs a transmit power control (TPC) such that a power spectral density (PSD) limit is not exceeded in communicating in the SL-U.

One aspect of the disclosure relates to a method comprising: receiving control signaling that configures a sidelink transmission structure for a physical sidelink feedback channel (PSFCH) transmission and one or more path-loss-based power control parameters; determining a number of physical resource blocks (PRBs) for the PSFCH transmission based at least in part on the sidelink transmission structure; determining a transmit power for at least a subset of the PRBs based at least on the one or more path-loss-based power control parameters; and transmitting the PSFCH transmission via the subset of PRBs using the determined transmit power.

Methods and apparatus for enhancing performance of a wireline communication network backhaul for wireless nodes based on data traffic and node characterization. In one embodiment, the node comprises a small-cell or other wireless base station (e.g., one utilizing unlicensed or quasi-licensed spectrum such as CBRS or C-Band) that is backhauled by a DOCSIS system within a managed HFC network, and the methods and apparatus utilize such factors as traffic load, geographic or topological location, node technology type, and user device profile for each node to determine scheduling of traffic over the wireline transmission medium used for the delivery of services. In another embodiment, the foregoing factors can be weighted for further determination related to an assignment of the time slots or other resources for the delivery of services.