241 results about "Licensed spectrum" patented technology

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may transmit, in a first slot within a channel occupancy time (COT), a first communication; determine whether one or more transmission criteria are satisfied for transmission of a second communication in a second slot within the COT; and selectively transmit the second communication in the second slot within the COT based at least in part on a result of determining whether the one or more transmission criteria are satisfied. Numerous other aspects are provided.

An operation method of a first device (100) in a wireless communication system is proposed. The method may comprise the steps of: selecting at least one first resource; determining whether to select an adjacent resource to the at least one first resource; selecting at least one second resource on the basis of determining to select the adjacent resource; and selecting at least one third resource on the basis of determining not to select the adjacent resource.

This disclosure provides systems, methods, and devices for wireless communication that support multi-channel access with respect to sidelink communication based on user equipment (UE) capability. In a first aspect, a UE providing sidelink transmission may implement sidelink unlicensed spectrum (SL-U) operation in which a multi-channel access procedure facilitates simultaneous access with respect to a plurality of different channel bandwidths in the unlicensed spectrum. Implementation of a particular SL-U multi-channel access procedure and / or UE capability independent from UE capability for multiple simultaneous transmissions. SL-U multi-channel access may facilitate transmission of a single sidelink channel over multiple channel bandwidths within a slot and / or transmission of multiple sidelink channels over multiple channel bandwidths within a slot. Other aspects and features are also claimed and described.

The exemplary embodiments relate to determining that code block group (CBG) based transmissions are enabled, transmitting, via an unlicensed spectrum, configured grants comprising one or more CBG based transmissions and one or more transport block (TB) based transmissions and receiving a downlink feedback information (DFI) downlink control information (DCI) format, wherein the DFI DCI format comprises a hybrid automatic repeating request (HARQ) bitmap corresponding to the TB based transmissions and a HARQ bitmap corresponding to the CBG based transmissions. The exemplary embodiments may be implemented in a computer readable storage medium, a user equipment (UE) or an integrated circuit.

Embodiments of the present disclosure relate to methods and apparatuses for sidelink synchronization signal block (S-SSB) transmission in an unlicensed spectrum. 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 at least one of the following: a first configuration associated with a time interval between adjacent S-SSB occasions sharing a same channel occupancy time (COT); a second configuration for performing listen before talk (LBT) type 2; or a third configuration for performing LBT type 1; and perform an LBT procedure associated with an S-SSB occasion based on the configuration information; a transmitter coupled to the processor and configured to transmit an S-SSB on the S-SSB occasion in response to the LBT procedure being successful; and a receiver coupled to the processor.

The present disclosure relates to methods and apparatuses for sidelink synchronization signal block (S-SSB) transmission in an unlicensed spectrum. One embodiment of the present disclosure provides a UE, comprising: a transceiver; and a processor coupled with the transceiver and configured to: obtain a first configuration for S-SSB in an unlicensed spectrum based on configuration or pre-configuration, wherein the first configuration for S-SSB is associated with a slot format including at least one S-SSB, and wherein at least one sidelink synchronization signal (SLSS) is multiplexed with at least one physical sidelink broadcast channel (PSBCH) in a frequency domain in at least one symbol of the at least one S-SSB; select at least one S-SSB occasion at least based on the first configuration; and transmit, with the transceiver, an S-SSB on the at least one S-SSB occasion in response to a LBT procedure associated with the at least one S-SSB occasion being successful.

An indication method is performed by a first user equipment (UE), and includes: receiving at least one sidelink (SL) transmission resource for SL transmission on an unlicensed spectrum scheduled by a network device; performing listen-before-talk (LBT) on the SL transmission resource; and sending indication information to the network device based on a performing result of the LBT, wherein the indication information is configured to indicate whether the first UE performs the SL transmission on the SL transmission resource.

Systems, methods, and circuitries are provided for a UE performing sidelink (SL) communication in unlicensed spectrum to update contention window size (CWS). In one example, a method includes, during a sidelink (SL) channel occupancy time (COT), transmitting one or more physical sidelink shared channels (PSSCHs) transmissions to one or more respective receiving (RX) UEs according. Each PSSCH includes one or more transport blocks (TBs) and is associated with a channel access priority class (CAPC). The UE updates the CWS for the CAPC based on feedback received with respect to the one or more PSSCHs associated with the CAPC and transmits subsequent PSSCH associated with the CAPC based on the updated CWS.

Embodiments of the present disclosure relate to methods and apparatuses for a cluster-based sidelink transmission(s) over an unlicensed spectrum. According to some embodiments of the disclosure, a UE may: receive data transmission on a PSSCH on a carrier; determine a first Type-1 interlace from a first set of Type-1 interlaces for transmitting a PSFCH carrying HARQ-ACK feedback corresponding to the data transmission, wherein each of the first set of Type-1 interlaces has a frequency span exceeding a predefined percentage of a frequency bandwidth of the carrier; and transmit the PSFCH on the first Type-1 interlace.

Disclosed are methods for allocating spectrum to a plurality of User Equipment (UEs) in a communication network served by a Mobile Satellite Service (MSS) satellite. The method includes receiving, by a first UE of the plurality of UEs, a spectrum usage map comprising one or more licensed frequency bands and one or more unlicensed frequency bands available for use by the first UE, selecting a communication frequency band among the one or more licensed frequency bands and the one or more unlicensed frequency bands, establishing, by the first UE, a communication link with the MSS satellite using the communication frequency band that was selected, and transmitting the spectrum usage map to one or more additional UEs of the plurality of UEs, wherein the additional UEs comprise a second UE. Related wireless electronic devices are also discussed.

According to some embodiments, a method is performed by a wireless device for operation with shared spectrum channel access, wherein a first plurality of fixed frame periods (FFPs) are associated with the wireless device and a second plurality of fixed frame periods (FFPs) are associated with a network node and wherein each FFP comprises an idle period with no transmission and a channel occupancy time (COT) for potential transmission. The method comprises initiating a COT in one of the FFPs of the first plurality of FFPs and upon successful initiation of the COT, transmitting uplink data from the beginning of the COT.

Provided are a method for a first device to perform wireless communication and a device supporting same. The method may comprise the steps of: acquiring configuration information related to a resource pool; triggering resource selection; determining a selection window on the basis of the resource selection being triggered; determining at least one candidate value for the number of slots for multi-slot based transmission on the basis of a channel occupancy time (COT) duration; selecting an N value on the basis of the at least one candidate value; and determining a candidate multi-slot resource in the resource pool in the selection window on the basis of the N value.

Proposed is an operation method of a first device (100) in a wireless communication system. The method may comprise the steps of: acquiring information about a first candidate start symbol and a second candidate start symbol, wherein the first and second start symbols are included in a first slot; acquiring information related to an RB set configured in an SL BWP; and determining, on the basis of the information related to the RB set, whether to use the second candidate start symbol as an AGC symbol.

Apparatuses, methods, and systems are disclosed for increasing the transmission reliability for transmissions of a duplication bearer in a shared or unlicensed spectrum. A UE apparatus for a mobile network (“NW”) includes a transceiver that initiates a listen before talk procedure (“LBT”) on shared spectrum, for transmission of a medium access control (“MAC”) protocol data unit (“PDU”) containing an original packet data convergence protocol (“PDCP”) PDU of a data radio bearer (“DRB”) configured for PDCP duplication, wherein PDCP duplication is deactivated for the DRB. The apparatus includes a processor that determines whether the LBT failed or succeeded and selectively enables PDCP duplication for the DRB in response to determining that the PDCP PDU was not transmitted due to failure of the LBT.

Provided are a method performed by a first device and a device supporting same in a wireless communication system. The method performed by a first device in a wireless communication system comprises the steps of: acquiring configuration information related to a physical sidelink feedback channel (PSFCH); transmitting a first sidelink control indicator (SCI) for scheduling a physical sidelink shared channel (PSSCH) and a second SCI to a second device through a physical sidelink control channel (PSCCH); transmitting data and the second SCI including information indicating a hybrid automatic repeat and request (HARQ) feedback enabled mode to the second device through the PSSCH; and determining a PSFDCH resource related to the PSSCH on the basis of the configuration information.

The present disclosure discloses a method and a device for wireless communications in a UE and a base station. A first node transmits a first signal; and monitors a first-type signaling in a first resource block in a first time window. The first signal is used for determining a first reference signal; the first node assumes a QCL parameter identical to a target reference signal for monitoring the first-type signaling in the first resource block in the first time window; the target reference signal is either the first reference signal or a second reference signal; whether the first time window belongs to a first-type time window is used for determining the target reference signal between the first reference signal and the second reference signal. The method provided above raises the chance of a node being served and resource utilization ratio in Unlicensed Spectrum.

Techniques discussed herein can facilitate multi-slot sidelink transmissions in the unlicensed spectrum. One example aspect is a baseband processor of a user equipment (UE), comprising a memory and one or more processors configured to, when executing instructions stored in the memory, cause the UE to determine a resource block (RB) set configuration for a multi-slot sidelink transmission with n slots. The one or more processors are further configured to determine a sidelink control information (SCI) configuration, based on the RB set configuration and generate SCI for the multi-slot sidelink transmission based on the SCI configuration. The SCI configuration includes a first stage SCI in a physical sidelink control channel (PSCCH) and a second stage SCI in a physical sidelink shared channel (PSSCH). Subsequently, the one or more processors are further configured to transmit the multi-slot sidelink transmission over the n slots where the multi-slot sidelink transmission includes the PSCCH and the PSSCH.

Methods and apparatuses for operation modes on unlicensed spectrum in a wireless communication system including a carrier operating with shared spectrum channel access. A method of operating a UE includes receiving a set of higher layer parameters from a BS over the carrier and determining, from the set of higher layer parameters, a first operation mode for the BS. The method further includes determining, from the set of higher layer parameters, a second operation mode for the UE and transmitting to the BS based on the second operation mode. The first operation mode and the second operation mode include information on whether channel sensing is required before transmission on the carrier operating with shared spectrum channel access.

A resource allocation method in sidelink communication by a user equipment (UE), includes the following operations. Listen-before-talk (LBT) channel access procedures are performed on resource block (RB) sets corresponding to sidelink transmissions of sidelink channels and sidelink resources within the RB sets are selected, such that the UE is configured to select and allocate transmission powers to the sidelink channels for feeding back a sidelink hybrid automatic repeat request (SL-HARQ) information in an unlicensed spectrum.

Disclosed are systems and techniques for wireless communications. For instance, a first network device for wireless communications may include at least one memory comprising instructions and at least one processor coupled to the memory. The at least one processor may be configured to generate a sidelink synchronization block (S-SSB), the S-SSB including at least two sidelink primary synchronization signal (SPSS) symbols and transmit, to a second network device, the generated S-SSB.

Techniques and examples are described for efficient detection of transmission periods in new radio unlicensed spectrum (NR-U). An apparatus (e.g., a user equipment (UE)) detects, in NR-U, a presence of an indication from a base station of a wireless network. The apparatus, in response to the detection, determines that a transmission opportunity (TXOP) is after the indication. The apparatus then receives, from the base station, a downlink (DL) transmission in NR-U during the TXOP.

A user equipment (UE) executes a wireless communication method to harmonize features for NR-based access to unlicensed spectrum (NR-U) and Ultra-reliable low-latency communications (URLLC). The UE comprises a medium access control (MAC) entity. The MAC entity prioritizes autonomous transmission of a pending MAC protocol data unit (PDU) through a first UL grant over transmission of the MAC PDU indicated as new data through a second UL grant when a logical channel (LCH) priority associated with the MAC PDU indicated as new data is not higher than an LCH priority associated with the pending MAC PDU. The MAC entity prioritizes transmission of the MAC PDU indicated as new data through the second UL grant over autonomous transmission of the pending MAC PDU when the LCH priority associated with the MAC PDU indicated as new data is higher than the LCH priority associated with the pending MAC PDU.

Methods and apparatuses for selective one-shot hybrid automatic repeat request (HARQ) feedback per priority level are described herein. For example, a wireless transmit / receive unit (WTRU) can determine a priority associated with each transport block (TB). The each TB can correspond to a respective HARQ process associated with a downlink transmission from a base station (BS). The WTRU can receive, from the BS, a request for the one-shot HARQ feedback with an indication of a selected priority for the one-shot HARQ feedback. The WTRU can generate a HARQ codebook for transmitting the one-shot feedback. The HARQ codebook can include one or more information bits corresponding to one or more TBs determined based on the indicated priority. The WTRU can determine a transmission power based on a number of the one or more information bits, and transmit the one-shot feedback including the generated HARQ codebook at the transmission power.

Embodiments of this disclosure relate to methods and apparatus for detecting sidelink transmission bursts on unlicensed spectrum. According to an embodiment of this disclosure, a method for wireless communication performed by a user equipment (UE) includes: generating a sequence; and transmitting the sequence at the start of a sidelink burst on a carrier, starting from a first candidate position in a set of candidate positions in a first time slot, wherein the sequence spans a predetermined number of consecutive symbols in the time domain and the sidelink burst is transmitted continuously in the time domain without any gaps.

Systems, methods, and circuits for adjusting random access channel (RACH) opportunities in unlicensed spectrum to support operations are provided. In one example, a method includes determining a set of preconfigured random access channel (RACH) opportunities (ROs) comprising a plurality of consecutive ROs; deriving a set of adjusted ROs by inserting time gaps between ROs in the set of preconfigured ROs; and transmitting a physical random access channel (PRACH) preamble in at least one RO in the set of adjusted ROs.

In accordance with an example embodiment of the present invention there is at least a method and apparatus for performing acquisition of access to a channel to initiate transmission of a charging signal and an activation signal, where acquisition of access to a channel is based at least on a selected channel access priority category, using a listen before talk procedure having a duration, and wherein the selected channel access priority category is selected based on the determined time to charge the energy storage device. Further, for performing an activation signal is received from an activating device of the communication network, where the activation signal includes information on at least one of: a type of listen-before-talk to be applied by the energy storage device, or a remaining effective channel occupancy time in which the energy storage device can apply the indicated type of listen-before-talk.

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.