563 results about "Unlicensed band" patented technology

A method, a user equipment (UE), and a base station for a sidelink operation in unlicensed bands are provided. A UE receives an RRC message, receives a PSSCH in an unlicensed channel, and attempts to transmit a feedback message in a first PSFCH in response to receiving the PSSCH. In a case that the first channel access procedure is not successful, the UE further attempts to transmit the feedback message in a second PSFCH. The RRC message includes a minimum gap between the earliest slot of multiple logical slots of the PSFCHs and a logical slot of the PSSCH, and the logical slots of PSFCHs are assigned for the PSSCH. The UE performs a first channel access procedure in the unlicensed channel before the first PSFCH. The UE performs a second channel access procedure in the unlicensed channel before the second PSFCH.

A communication device that performs sidelink communication using an unlicensed band includes an acquisition unit that acquires information of a resource pool including one or a plurality of sidelink BWPs (Sidelink Bandwidth Parts) and a communication control unit that performs, based on the information of the resource pool, the sidelink communication using the unlicensed band. The one or the plurality of sidelink BWPs are set to correspond to one or a plurality of LBT bandwidths (Listen Before Talk Bandwidths).

Various embodiments herein provide techniques for sidelink (SL) communication on unlicensed spectrum. For example, embodiments provide techniques for a physical sidelink feedback channel (PSFCH) and / or a SL synchronization signal block (S-SSB), such as techniques related to a listen-before-talk (LBT) procedure and / or occupied channel bandwidth (OCB) requirements. Other embodiments may be described and claimed.

According to embodiments, a user equipment (UE) performs a first type of sensing in a sensing window to detect first one or more SL transmissions using a sidelink (SL) radio access technology (RAT). The UE performs a second type of sensing to detect second one or more transmissions using a non-SL RAT different from the SL RAT. The second type is different from the first type. The UE selects an SL resource in an unlicensed band in a selection window for an SL transmission based on the first type of sensing and the second type of sensing. The UE transmits the SL transmission via the SL resource using the SL RAT.

Various embodiments herein relate to identifying an indication of a channel access priority class (CAPC); identifying, based on the CAPC and a table related to the CAPC, a length of a channel occupancy time (COT); and participating in a sidelink (SL) communication in the unlicensed spectrum based on the COT. Other embodiments may be described and / or claimed.

Example embodiments of the present disclosure relate to a device, method, apparatus and computer readable storage medium for hybrid automatic repeat request (HARQ) feedback for adjustment of contention window size for communication in an unlicensed band. In example embodiments, if it is determined that a failure of transmission in an unlicensed occurs, the device determines a cause of the failure of the transmission is determined based on received information associated with a transmission collision. Then, the device adjusts a size of a contention window for a listen-before-talk procedure.

A terminal includes a reception unit that receives a synchronization signal block in an unlicensed band of a high frequency band higher than or equal to a frequency band of a frequency range 2 (FR2), the FR2 being in a range including a frequency range 1 (FR1) that is a low frequency band and the FR2 that is a high frequency band in a new radio (NR) system; and a control unit that identifies, based on the received synchronization signal block, an index of a candidate position for a transmission corresponding to the received synchronization signal block, from among candidate positions for transmitting a synchronization signal block, the number of the candidate positions being greater than a predetermined number.

Provided are a method for performing wireless communication by a first device and an apparatus supporting same. The method may comprise: obtaining information related to at least one resource block (RB) set for physical sidelink feedback channel (PSFCH) transmission; receiving, from a second device, a physical sidelink shared channel (PSSCH); determining a number of PSFCH resources related to the PSSCH; determining an index of an interlaced PSFCH resource among the PSFCH resources, in response to the PSSCH; and performing the PSFCH transmission based on the interlaced PSFCH resource.

A method for performing wireless communication by a first device, and an apparatus supporting same are provided. The method may comprise the steps of: receiving information related to channel occupancy time (COT) from a second device; receiving a first physical sidelink shared channel (PSSCH) from the second device; determining a first PSFCH resource for first physical sidelink feedback channel (PSFCH) transmission related to the first PSSCH; and performing second-type channel access for the first PSFCH transmission within the COT.

Provided are a method by which a first device performs wireless communication and an apparatus supporting same. The method comprises the steps of: acquiring information related to a channel occupancy time (COT), the information related to the COT including information related to a condition for determining whether or not to share the COT; on the basis of whether or not the condition is satisfied, determining a type of channel access; and on the basis of the channel access, determining whether or not to perform sidelink (SL) transmission, wherein the SL transmission may include transmission of first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) and second SCI, via a physical sidelink control channel (PSCCH), and transmission of the second SCI via the PSSCH.

An operation method for a first device (100) in a wireless communication system is presented. The method may comprise the steps of: receiving information about a COT from a second device (200); receiving a plurality of PSSCHs; and determining to use the COT in order to transmit a plurality of PSFCHs related to the plurality of PSSCHs on the basis that a first PSFCH related to a first PSSCH from among the plurality of PSSCHs is transmitted, to the second device (200), from a first resource within a first RB set related to the COT.

The present disclosure relates to a communication technique for converging IoT technology with 5G communication systems for supporting a higher data transfer rate beyond 4G systems, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security-and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. In addition, the present disclosure relates to a method and a device for transmitting / receiving sidelink information in an unlicensed band.

A method by which a first device performs wireless communication and a device supporting same are provided. The method may comprise the steps of: acquiring information related to a resource for a sidelink-synchronization signal block (S-SSB); acquiring information about a first time domain for a first cyclic prefix extension (CPE) related to S-SSB transmission; performing the first CPE during the first time domain before the S-SSB transmission; and performing the S-SSB transmission on the basis of the resource.

According to embodiments, a user equipment (UE) initiates a channel occupancy time (COT) following a successful listen before talk (LBT) procedure. The UE transmits to a second UE COT information indicating that the COT is sharable. The UE transmits a sidelink (SL) transmission in an unlicensed band within the COT.

A first wireless device determines, for transmission of a physical sidelink feedback channel (PSFCH) for a transport block (TB), a plurality of PSFCH transmission occasions associated with the TB, based on: a number of slots between a slot comprising a PSFCH resource and a last slot of reception of the TB, and a periodicity of the slot comprising the PSFCH resource. The first wireless device performs, in response to not transmitting the PSFCH via one or more first PSFCH transmission occasions, a channel access procedure to transmit the PSFCH, via a second PSFCH transmission occasion among the plurality of PSFCH transmission occasions, wherein the second PSFCH transmission occasion occurs after the one or more first PSFCH transmission occasions. The first wireless device transmits, via the second PSFCH transmission occasion and based on performing the channel access procedure, the PSFCH.

A method of wireless communication performed in a shared frequency band at a user equipment (UE) comprises: receiving a sidelink (SL) communication; selecting a channel access configuration for a physical sidelink feedback channel (PSFCH) occasion in a shared frequency band; and transmitting, based on the channel access configuration and the SL communication, a PSFCH communication in the PSFCH occasion in the shared frequency band.

A method for operating a first device (100) in a wireless communication system is proposed. The method may comprise the steps of: obtaining SL synchronization priority information set to GNSS-based synchronization or base station-based synchronization; selecting at least one synchronization criterion on the basis of the SL synchronization priority information; obtaining time synchronization from the at least one synchronization criterion; and transmitting an S-SSB including PSBCH, S-PSS, and S-SSS on an unlicensed band, on the basis of the time synchronization.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides a method performed by a first node in a communication system is provided. The method comprising: determining candidate resources on an unlicensed band; and selecting multiple resources from the candidate resources. This method combines advantages of a channel sensing used to avoid interference within system on the licensed band and a LBT technology used to avoid interference from other communication systems on the unlicensed band, so that a UE can select resources with better performance on the unlicensed band and minimize interference to other communication systems.

Disclosed are methods for allocating spectrum by a Mobile Satellite Service (MSS) satellite to a User Equipment (UE). The method includes monitoring, by the MSS satellite, radio spectrum in a coverage area of the MSS satellite, determining a spectrum usage map of the radio spectrum in the coverage area, where the spectrum usage map comprises frequency bands comprising licensed frequency bands and unlicensed frequency bands, and transmitting the spectrum usage map for use by the UE. Related wireless electronic devices are also discussed.

Disclosed are a method by which a first device performs wireless communication, and a device supporting the method. The method comprises the steps of: obtaining information related to one or more RB sets including a plurality of interlaced resource blocks (RBs); transmitting first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) and second SCI through a physical sidelink control channel (PSCCH); and transmitting the second SCI through the PSSCH, wherein the PSCCH may be located in a subchannel of the lowest index of the lowest index RB set for the PSSCH in the one or more RB sets.

Embodiments provide a transceiver of a 4th or 5th generation mobile communication system, wherein the transceiver is configured to operate in a sidelink mode, wherein the transceiver is configured, in the sidelink mode, to transmit or receive signals using radio resources in an unlicensed band, wherein the unlicensed band is one out of the following unlicensed bands:the 2.4 GHz band,the 5 GHz band with the exception of the intelligent transport system, ITS, band,the 6 GHz band,the 60 GHz band,the 57 GHz to 71 GHz band,unlicensed bands in FR2 range.

A wireless UE that operates in a sidelink unlicensed band in a wireless communication system may include at least one antenna configured to transmit and receive one or more wireless signals, at least one processor, and a memory configured to store instructions for the wireless UE when executed by the at least one processor, and the operation of the wireless UE may include determining the number of OFDM symbols available for PSSCH transmission; determining the number of coded symbols of 2nd SCI based on the number of OFDM symbols available for PSSCH transmission; determining the number of resource elements of 2nd SCI based on the number of coded symbols of 2nd SCI; and mapping the 2nd SCI to radio resources based on a parameter related to a starting OFDM symbol location and a parameter related to the number of OFDM symbols and transmitting the same to another wireless UE.

A method of configuring a sidelink resource pool in a user equipment (UE) in a wireless communication system may include receiving, by the UE, resource pool configuration information from a base station based on higher layer signaling; transmitting sidelink control information (SCI) to another UE based on the resource pool configuration information; and performing sidelink communication with the other UE, and the resource pool configuration information may be information that is based on sidelink resource pool configuration of an unlicensed band.

A wireless device receives configuration parameters indicating: a sidelink resource pool of a sidelink bandwidth part configured in a shared spectrum, one or more resource blocks for a physical sidelink feedback channel transmission via the sidelink resource pool, and a first common interlace index, among a plurality of common interlace indexes, configured for the PSFCH transmission via the sidelink resource pool. The wireless device determines multiple common RBs of a first common interlace corresponding to the first common interlace index. An index of each of the multiple common RBs is based on: an interlaced RB index corresponding to the first common interlace index, and a first common RB index indicating a starting RB of the sidelink BWP. The wireless device transmits, during a PSFCH slot, one or more sidelink transmissions via at least one RB of the one or more RBs, and via the multiple common RBs.

A transmission device may perform listen-before-talk (LBT) with regard to an unlicensed band. The transmission device may determine M LBT sub-bands which are in an idle state, on the basis of the performing of the LBT for the unlicensed band. The transmission device may perform N repetitive transmissions of a transport block (TB) over the M LBT sub-bands. The N repetitive transmissions of the TB may include performing M repetitive transmissions over the M LBT sub-bands, respectively.

Apparatuses, methods, and systems are disclosed for UE assistance for no-LBT based unlicensed channel access. A processor (305) calculates a combined gain from a combination of an antenna configuration gain and a beamforming gain for at least one transmission beam. The processor (305) determines if the at least one transmission beam can be used for a no-LBT based channel access mechanism in an unlicensed band with or without a channel occupancy duration restriction based on the combined gain. The processor (305) transmits, via a transceiver (325), to a network node, information that indicates whether the at least one transmission beam can be used for a no-LBT based channel access mechanism in an unlicensed band with or without a channel occupancy duration restriction, or whether the network node can apply an LBT-based channel access mechanism, or some combination thereof.

The method by which a terminal sets a sidelink resource pool in a wireless communication system comprises steps in which the terminal: receives, from a base station, resource pool configuration information on the basis of upper layer signaling; and performs sidelink communication with another terminal on the basis of the resource pool configuration information, wherein the resource pool configuration information can be information based on a sidelink resource pool configuration of an unlicensed band.

A wireless device selects, based on a sidelink (SL) selection window for SL resource selection, a first multi-slot resource from among a set comprising multi-slot candidate resources in a SL resource pool. The first multi-slot resource comprises a plurality of SL slots. The wireless device determines a random number, between zero and a value of a contention window, as an initial value of a counter for a type 1 channel access procedure. The wireless device senses, after a value of the counter is zero, a channel to be idle. The wireless device transmits, to a second wireless device and via the first multi-slot resource, a second stage SL control information (SCI) comprising an SCI format 2-A. The SCI format 2-A indicates a duration of a channel occupancy time (COT). The COT is initiated, by the wireless device, based on sensing the channel to be idle.

An approach is described for a user equipment (UE) configured for a new radio (NR) system with unlicensed spectrum. The UE includes processor circuitry that performs a first channel load measurement at a first frequency of a serving cell and a second channel load measurement at a second frequency of a neighbor cell and associates a report with the first channel load measurement and the second channel load measurement. At least one of the first frequency and the second frequency is in the unlicensed spectrum. The UE also includes radio front end circuitry that is coupled to the processor circuitry and configured to transmit the report to an access node (AN).

A method by which a terminal transmits an uplink signal in an unlicensed band, and an apparatus using same are provided. The method receives, from a base station, channel occupancy information through a PDCCH and transmits the uplink signal to the base station through a configured grant uplink access (CUL) type physical uplink shared channel (PUSCH) on the basis of the channel occupancy information. The channel occupancy information indicates which sub-band of a CUL band including a plurality of sub-bands enables the terminal to transmit the CUL type PUSCH within a channel occupancy time (COT) acquired by the base station through a channel access procedure.