1522 results about "Sounding reference signal" patented technology

Disclosed are techniques for wireless communication. In an aspect, a reconfigurable intelligent surface (RIS) transmits a sounding reference signal (SRS) transmission request message to a base station serving a user equipment (UE), the SRS transmission request message including one or more SRS transmission properties to be used by the base station to configure the UE to transmit SRS, receives a response message from the base station, the response message indicating one or more SRS configurations the UE is configured to use to transmit SRS, the one or more SRS configurations based on the one or more SRS transmission properties, and measures a plurality of SRS transmissions from the UE with a plurality of receive beams to determine a best receive beam for receiving uplink transmissions from the UE, wherein the plurality of SRS transmissions is based on at least one SRS configuration of the one or more SRS configurations.

Embodiments of the present disclosure relate to a method and apparatus for multiple transmit-receive points (multi-TRP) transmission. According to an embodiment of the present disclosure, a method can include: receiving first configuration information for uplink phase tracking reference signal (PT-RS) and second configuration information indicating a plurality of sounding reference signal (SRS) resource sets, wherein each of the plurality of SRS resource sets is associated with at least one physical uplink shared channel (PUSCH) repetition; for each PUSCH repetition, determining a number of PT-RS ports for transmitting the uplink PT-RS; and transmitting two or more PUSCH repetitions. Embodiments of the present disclosure can resolve the issues caused by the imbalance numbers of PT-RS ports between different TRPs.

A method applied to a network device includes: sending configuration information to a terminal device, where the configuration information indicates M sounding reference signal (SRS) resource sets, the M SRS resource sets include X first SRS resource sets and Y second SRS resource sets, the X first SRS resource sets include at least one first SRS resource, the Y second SRS resource sets include at least one second SRS resource, a time domain resource corresponding to the at least one first SRS resource is a subband full duplex (SBFD) type time unit, and a time domain resource corresponding to the at least one second SRS resource is a non-SBFD type time unit; and receiving an SRS from the terminal device based on the configuration information.

Aspects described herein relate to recycling transmit or receive antennas from one band to another and accordingly modifying certain operations, which may include channel state information (CSI) reporting, sounding reference signal (SRS) transmission, and / or the like.

This disclosure describes systems, methods, and devices for configuring sounding reference signal resources across multiple frequency locations for device positioning. A device may encode for transmission a sounding reference signal (SRS) including a first set of SRS resources for a first transmission by a user equipment (UE) device to the node B network device at a first time and a second set of SRS resources for a second transmission by the UE device to the node B network device at a second time; decode the first transmission received from the UE device using the first set and a first bandwidth at the first time; decode the second transmission received from the UE device using the second set and a second bandwidth at the second time; and combine the first transmission and the second transmission for a device positioning estimation based on the first bandwidth and the second bandwidth.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information for a sounding reference signal (SRS) resource set, the configuration information indicating a usage type for the SRS resource set associated with Doppler tracking and a configuration for one or more associated SRS resource identifiers. Some configuration parameters of the SRS resource set and the associated SRS resource identifiers can be dynamically reconfigured in order to allow adaptive SRS time domain pattern for enhanced Doppler parameter estimation and / or synchronization loop tracking, among other examples. The UE may transmit one or more SRSs in accordance with the configuration or dynamic reconfiguration information for the SRS resource set and the associated SRS resources based at least in part on receiving the configuration and / or reconfiguration information. Numerous other aspects are described.

This disclosure provides systems, methods, and devices for wireless communication that support mechanisms for base station-assisted UE antenna port selection. A user equipment (UE) transmits, to a base station, a sounding reference signal (SRS) switching capability report (e.g., a xTyR report) indicating to the base station a number of receive antenna ports configured for the UE. (e.g., capability to transmit on x antenna ports and reception over a total of y antenna ports). The UE transmits an SRS to the base station sounding the y antenna ports. The base station selects and indicates y′ antenna ports out of the y antenna ports for the UE to receive a subsequent downlink data transmission based on a channel estimation based on the SRS transmission, or based on channel state feedback (CSF). In aspects, the UE provides a recommendation of y′, and the base station may determine y′ based on the UE's recommendation.

The present disclosure relates to SRS enhancement to support more than four layers non-codebook based uplink transmission. In an aspect, a wireless device may comprise at least one antenna; at least one radio coupled to the at least one antenna; and a processor coupled to the at least one radio; wherein the processor is configured to: receive, via the at least one radio, at least one Radio Resource Control (RRC) signaling from a cellular base station, wherein, the at least one RRC signaling configures at least one group of N Sounding Reference Signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and transmit, via the at least one radio, SRSs to the cellular base station on the configured group of SRS resources, wherein each SRS is transmitted on one SRS resource of the configured group of SRS resources.

Methods and apparatuses for user equipment (UE) initiated early sounding reference signal (SRS) triggering. A method of operating a UE includes receiving a configuration related to a SRS. The configuration indicates a list of downlink (DL) signals associated with one or more cells, SRS resources, and an association between the DL signals and the SRS resources The method further includes measuring and determining a DL signal from the DL signals and determining, from the SRS resources, an SRS resource associated with the DL signal. The method further includes transmitting an uplink (UL) signal associated with the determined SRS resource and transmitting the SRS resource based on the UL signal.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a mobile station may receive configuration information indicating sounding reference signal (SRS) resource sets, the configuration information indicating: a first set of SRS resource sets, of the SRS resource sets, associated with a first downlink control information (DCI) format, and a second set of SRS resource sets, of the SRS resource sets, associated with a second DCI format, wherein at least one of the first set or the second set comprises at least two of the SRS resource sets. The mobile station may transmit, based at least in part on the configuration information, at least one uplink communication using at least one SRS resource of at least one of the SRS resource sets of at least one of the first set or the second set. Numerous other aspects are described.

Systems and methods for the use of multiple-antenna-panel simultaneous physical uplink shared channel (PUSCH) transmissions are disclosed herein. A sounding reference signal (SRS) resource set indicator corresponding to a pair of SRS resource set may be provided by a network to a user equipment (UE), where the pair of SRS resource sets includes a first SRS resource set for a first PUSCH on a first antenna panel of the UE and a second SRS resource set for a second PUSCH on a second antenna panel of the UE. The UE may also receive, from the network, a pair of SRS resource indicators (SRIs). The UE may match each of the SRIs to one of the SRS resource sets based on the SRS resource set indicator. The multi-panel simultaneous PUSCHs are then transmitted on the antenna panels according to the matching of the SRS resource sets to the SRIs.

The present disclosure relates to a method performed by user equipment (UE) in a wireless communication system. Particularly, the method comprises the steps of: receiving, from a base station (BS), downlink control information (DCI) for simultaneous transmission across multiple panels (STxMP); and on the basis of association information between a phase tracking (PT)-reference signal (RS) port and a demodulation (DM)-RS port included in the DCI, to the BS, transmitting a first PT-RS on a first PT-RS port and transmitting a second PT-RS on a second PT-RS port, wherein first information of the association information between the PT-RS port and the DM-RS port indicates a first DM-RS port associated with the first PT-RS port, from among DM-RS ports corresponding to at least one of a first sounding reference signal resource indicator (SRI) and first precoding information, and second information of the association information between the PT-RS port and the DM-RS port indicates a second DM-RS port associated with the second PT-RS port, from among DM-RS ports corresponding to at least one of a second SRI and second precoding information.

The present application relates to devices and components including apparatus, systems, and methods to perform a codebook-based SRS transmission. In an example, eight or more antenna ports are used for the codebook-based SRS transmission. In this example, a UE can be configured by a base station for the codebook-based SRS transmission, whereby the configuration indicates a particular comb configuration, symbol index configuration, and / or cyclic shift configuration to allow the use of the eight or more antenna ports.

A baseband processor, user equipment (UE), and network device are described. The baseband processor and UE can perform receiving control signaling that indicates a sounding reference signal (SRS) configuration of a set of SRS ports associated with a set of antenna ports, where the UE can perform antenna switching using the antenna ports. The SRS configuration identifies at least a first and second SRS resources. The baseband process can provide SRSs for transmission from the UE using the first and second SRS resources, and transmit a control message that includes power headroom reports that indicate first and second power values for the first and second SRS resources, for example indicating an antenna imbalance at the UE. Examples are further described for a UE to maintain a same phase for SRS transmissions during a window, and flexibly SRS rate match around uplink shared channel signals.

A wireless device receives one or more radio resource control (RRC) messages indicating a plurality of control resource set (CORESET) groups and a plurality of sounding reference signal (SRS) resource sets. Each of the plurality of CORESET groups corresponds to a respective SRS resource set of the plurality of SRS resource sets. The wireless device receives, via a CORESET of a CORESET group of the plurality of CORESET groups, a downlink control information (DCI) scheduling transmission of an uplink signal. The wireless device determines an SRS resource set, from the plurality of SRS resource sets, corresponding to the CORESET group comprising the CORESET. The wireless device transmits the uplink signal based on an SRS resource in the SRS resource set.

Embodiments are disclosed for Sounding Reference Signal (SRS) uplink power control in case of multiple Transmission and Reception Points (TRPs). In one embodiment, a method in a User Equipment (UE) comprises receiving information that configures first and second SRS resource / resource sets with first and second SRS sequences and first and second sets of power control parameters, respectively, wherein the first and second SRS resources / resource sets are associated with a same set of UE antenna ports. The method further comprises transmitting, at a first instant(s), a first SRS using the first SRS resource / resource set with the first SRS sequence at a first uplink power level determined based on the first set of power control parameters and transmitting, at a second instant(s), a second SRS using the second SRS resource / resource set with the second SRS sequence at a second uplink power level determined based on the second set of power control parameters.

A central unit (CU) of a distributed base station that further includes a distributed unit (DU) is configured to transmit, to the DU, a CU-to-DU message requesting sounding reference signals (SRS) resources for a UE; receives, from the DU and in response to the CU-to-DU message, a DU-to-CU message including an SRS configuration for the UE; and transmits, to the UE via the DU, a command to release the radio connection, the command including the SRS configuration.

A wireless transmit / receive unit (WTRU) may be configured to receive configuration information indicating a plurality of sets of associations. Each set of associations may comprise a plurality of respective time instances and a plurality of respective timing advance (TA) offsets. The WTRU may transmit an indication of at least one of a mobile network node identification or WTRU location information. The WTRU may receive an indication of a first set of associations of the plurality of sets of associations. The WTRU may transmit a first sounding reference signal (SRS) for positioning (SRSp) transmission beginning at a first time. The first time may be determined based on at least a first TA offset of the first set of associations and a respective first time instance associated with the first TA offset.

Methods, systems, and devices for increasing transmission capacity of sounding reference signals (SRS) in mobile communication technology are described. An example method for wireless communication includes receiving, by a wireless device from a network node, a configuration comprising A orthogonal code sequences for a sounding reference signal (SRS) resource, wherein each of the A orthogonal code sequences is configured for L adjacent SRS symbols within the SRS resource, wherein L is a length of each of the A orthogonal code sequences, and wherein L and A are positive integers, and transmitting a reference signal that is generated based on the configuration.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information for a sounding reference signal (SRS) resource set, the configuration information indicating a usage type for the SRS resource set associated with Doppler tracking and a configuration for one or more associated SRS resource identifiers. Some configuration parameters of the SRS resource set and the associated SRS resource identifiers can be dynamically reconfigured in order to allow adaptive SRS time domain pattern for enhanced Doppler parameter estimation and / or synchronization loop tracking, among other examples. The UE may transmit one or more SRSs in accordance with the configuration or dynamic reconfiguration information for the SRS resource set and the associated SRS resources based at least in part on receiving the configuration and / or reconfiguration information. Numerous other aspects are described.

The present disclosure provides a random access method in a wireless communication system. According to various embodiments of the present disclosure, the method performed by a user equipment in a wireless communication system may comprise the steps of: receiving, from a base station, first information for configuring a resource for a first symbol and second information for configuring a resource for a second symbol; receiving, from the base station, first downlink control information (DCI) including a first sounding reference signal resource indicator (SRI) for the first symbol and / or a second SRI for the second symbol; and transmitting, to the base station, a physical uplink shared channel (PUSCH) on the first symbol and / or the second symbol, wherein the first SRI is associated with a first SRS resource before receiving the first DCI, and the symbol type of the first symbol is the same as the symbol type of the first SRS resource, and the second SRI is associated with a second SRS resource before receiving the first DCI, and the symbol type of the second symbol is the same as the symbol type of the second SRS resource.

Disclosed are techniques for communication. In an aspect, a wireless node (e.g., UE or BS) measures a first TOA of a first SRS-P from a UE, a second TOA of a reflection of a second SRS-P from the UE off of a first RIS, and a third TOA of a reflection of a third SRS-P from the UE off of a second RIS. The UE transmits, to a position estimation entity, measurement information based on the first, second and third TOAs. The position estimation entity determines a positioning estimate of the UE based at least in part on the measurement information.

A method by a wireless device includes determining a value of a Sounding Reference Signal (SRS) request field size. The wireless device receives downlink control information (DCI) from a network node. The DCI is received according to a format. The wireless device selects a SRS resource set based on the format of the DCI and the value of the SRS request field size.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may receive, from a second network node, a sounding reference signal (SRS) configuration associated with an SRS resource set including one or more SRS resources, the SRS configuration indicating information for a set of one or more frequency domain parameters associated with the SRS resource set. The first network node may receive, from the second network node, a message indicating modified information for a dynamic reconfiguration of one or more frequency domain parameters, from the set of one or more frequency domain parameters, associated with at least one SRS resource. The first network node may transmit, to the second network node, an SRS, using the at least one SRS resource, in accordance with the modified information for the one or more frequency domain parameters. Numerous other aspects are described.

A method performed by a terminal in a TDD communication system is provided. The method includes identifying that the terminal supports half-DuplexTDD-CA-SameSCS capability, identifying that directionalCollisionHandling is configured as ‘enabled’ for a set of serving cells among multiple serving cells including a first serving cell and a second serving cell, in case that the terminal is not capable of simultaneous reception and transmission on the first and second serving cells, identifying that the terminal is not configured to monitor a PDCCH for DCI format 2_0 on any of the multiple serving cells, identifying a first carrier of the first serving cell not configured for a PUCCH / PUSCH, and in case that a SRS on the first carrier and a physical channel on a second carrier of the second serving cell collide and directionalCollisionHandling is configured as ‘enabled’, applying a priority rule for the SRS transmission and then a procedure for the directional collision handling.

Disclosed are a method and device for transmitting and receiving sounding reference signal in a wireless communication system. A method for transmitting a physical uplink shared channel (PUSCH) according to an embodiment of the present disclosure may comprise the steps of: transmitting, to a base station, terminal capability information related to antenna switching; receiving configuration information related to an SRS from the base station; and transmitting the SRS to the base station to the basis of the configuration information. The configuration information may include information about a plurality of SRS resource sets, the usage of which has been set to antenna switching, and antenna port information about the plurality of SRS resource sets.

Embodiments of the present disclosure relate to methods, devices and computer readable media for communications. According to embodiments of the present disclosure, a first terminal device performs a CLI measurement associated with a transmit beam of a first network device on a Sounding Reference Signal (SRS) received from a second terminal device. Then, the first terminal device performs a Beam Failure Detection (BFD) procedure based on the CLI measurement.

A wireless device may receive one or more radio resource control (RRC) messages comprising one or more configuration parameters. The one or more configuration parameters may comprise (i) a sounding reference signal (SRS) resource indicator (SRI), for a configured uplink grant, indicating an SRI-physical uplink shared channel (PUSCH) power control parameter set and (ii) a pathloss reference signal update parameter enabling an activation command to update pathloss reference signals of an uplink channel. In response to the one or more configuration parameters comprising the pathloss reference signal update parameter, the wireless device may determine a transmission power for a transport block of the configured uplink grant based on a pathloss reference signal mapped to the SRI-PUSCH power control parameter set. The wireless device may transmit the transport block with the transmission power.

Wireless communication devices, systems, and methods related to bundling of uplink communication signals under timing advance (TA) conditions are provided. For example, a method of wireless communication performed by a user equipment can include receiving, from a base station, a timing advance (TA), wherein the TA is scheduled to be implemented by the user equipment at a first time, the first time being after a start of a first uplink communication of a group of bundled uplink communications scheduled with phase coherence and before a start of a second uplink communication of the group of bundled uplink communications; determining whether to implement the TA at the first time or a second time, the second time being after transmission of the second uplink communication; and implementing the TA based on the determining.

Wireless communications are described. A wireless device and / or a base station may determine / select one or more beams for transmission of signals (e.g., sounding reference signals, SRSs) in one or more cells. The wireless device and / or the base station may determine / select a beam based on one or more of: cell indicators of a first cell and / or a second cell, antenna panel indicators associated with SRS transmissions, priorities of SRS transmissions, resource set indicators corresponding to the SRS transmissions, and / or other information.