859 results about "Sounding reference signal" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

A communication method includes the following. A terminal device sends a first physical uplink shared channel (PUSCH) and a second PUSCH. The terminal device corresponds to N sounding reference signal (SRS) resource sets, the first PUSCH is associated with a first SRS resource set among the N SRS resource sets, the second PUSCH is associated with a second SRS resource set among the N SRS resource sets, and the first SRS resource set is different from the second SRS resource set. The terminal device includes M antenna ports. A first precoding matrix for the first PUSCH and a second precoding matrix for the second PUSCH belong to a first precoding matrix set, a non-zero element in a column vector of each precoding matrix in the first precoding matrix set is less than or equal to M / N, and M and N are integers greater than or equal to 2.

A wireless device, comprising uplink panels, may receive one or more radio resource control (RRC) messages. The one or more RRC messages may comprise a channel state information (CSI) report configuration indicating a sounding reference signal (SRS) resource. The wireless device may transmit, based on the CSI report configuration, a CSI report indicating an uplink panel, of the uplink panels, associated with the SRS resource. The wireless device may activate the uplink panel in response to transmitting the CSI report. The wireless device may receive an uplink grant scheduling an uplink signal transmission via the uplink panel and based on the SRS resource.

A method performed by a user equipment (UE) for dynamically allocating data transmission resources in a massive multiple input multiple output (MEMO) system is disclosed. The UE receives from a network node at least one initial channel state information reference signal (CSI-RS) resource set comprising at least an initial number of ports. A sounding reference signal (SRS) is transmitted to the network node. The network node transmits to the UE a dynamically allocated number of CSI-RS ports, or alternatively, a trigger state for a predefined CSI-RS resource set and a beamformed CSI-RS. The UE computes one or more parameters corresponding to channel state information (CSI) from the beamformed CSI-RS. A CSI report comprising the one or more parameters is transmitted to the network node. The UE then receives user data over a data traffic channel using the dynamically allocated number of CSI-RS ports, or alternatively the pre-defined CSI-RS resource set.

The invention provides a secondary cell activation method, device and system, and the method can be suitable for a secondary cell activation scene. In the method, a terminal device receives a first signaling sent by a network device, the first signaling is used for triggering activation of a secondary cell, and the first signaling carries first indication information through a reserved bit, and the first indication information is used for indicating the terminal device to send a first sounding reference signal to the network device, the first sounding reference signal is used for determining uplink channel state information. And the terminal device determines a transmission resource corresponding to the secondary cell from a pre-configured transmission resource set based on the first indication information, the transmission resource being used for guiding the transmission of the first sounding reference signal. And then, the terminal equipment sends the first sounding reference signal to the network equipment by using the transmission resource. Therefore, according to the method, the first indication information can be carried through the reserved bit in the first signaling, the first signaling does not need to be transformed, and correct analysis of the first signaling is ensured.

A terminal device receives a physical downlink control channel (PDCCH) from a network device, wherein the PDCCH bears an uplink grant that is used to schedule a physical uplink shared channel (PUSCHH). The the PUSCH is associated with a nearest sounding reference signal (SRS) corresponding to an SRS identifier and the uplink grant includes the SRS identifier and then the terminal device sends the PUSCH.

Methods, systems, and devices for wireless communications are described. A UE may receive one or more control messages that indicate a quantity of a set of sounding reference signal (SRS) resource sets configured for codebook usage and at least one maximum rank value associated with uplink shared channel transmissions by the UE. The UE may receive downlink control information (DCI) with an SRS resource indicator (SRI) field and a transmit precoding matrix indicator (TPMI) field. The UE may then interpret the SRI and TPMI fields according to a mapping that is based on the maximum rank value and a maximum quantity of ports the UE is capable of supporting. Then, the UE may transmit the uplink shared channel message in accordance with the mapping.

A Method for switching an antenna switching configuration, includes: according to a target antenna switching configuration to which a terminal device is to switch on a current bandwidth part (BWP), a network device sending to the terminal device indication information for activating a corresponding target sounding reference signal (SRS) resource configuration, so that after receiving the indication information of the target SRS configuration, which is sent by the network device, the terminal device switches to the corresponding target antenna switching configuration on the current BWP according to the indication information of the target SRS configuration.

This disclosure relates to the field of communication technologies, and discloses a timing advance adjustment method and an apparatus. The method includes: A terminal device receives a handover command from a first cell, where the handover command instructs to perform handover to a second cell, sends a sounding reference signal (SRS) to the second cell based on a first timing advance (TA), receives a TA adjustment command from the second cell, where the TA adjustment command includes an adjustment amount for the first TA, and the adjustment amount is determined by the second cell based on the received SRS, and sends an uplink signal to the second cell based on a second TA, where the second TA is determined based on the first TA and the adjustment amount.

The disclosure pertains to methods and apparatus for performing positioning of wireless transmit and / or receive units (WTRUs) in wireless communication systems. A WTRU may receive configuration information indicating a time window associated with positioning. The configuration information may indicate any of a duration and a periodicity of the time window. The WTRU may receive (1) first scheduling information indicating to transmit a first uplink transmission including a sounding reference signal (SRS) and (2) second scheduling information indicating to transmit a second uplink transmission including a positioning SRS (SRSp). The first uplink transmission may not include any SRSp. On condition that the second uplink transmission is scheduled for transmission during the time window, the WTRU may transmit the second uplink transmission during the time window and may transmit the first uplink transmission only when the first uplink transmission is scheduled for transmission outside of the time window.

Sounding Reference Signal (SRS) capacity is increased by introducing Time Domain Orthogonal Cover Codes (TD-OCC) over multiple SRS repetitions. A UE may indicate to the network a capability to support TD-OCC for SRS. In response, the network provides configurations controlling the content and format of the SRS. An SRS resource configuration may include at least an SRS Repetition Factor≥2. A TD-OCC configuration may include at least one of a TD-OCC length and a TD-OCC code. The UE C indication may indicate a maximum TD-OCC length that is supported for an SRS resource; all TD-OCC lengths that are supported; that supported TD-OCC lengths are 2n for positive integers n; that different TD-OCC codes are supported for different SRS ports of an SRS resource; or that the TD-OCC length maybe different than the SRS Repetition Factor. Techniques are disclosed herein for implementing all of these variations.

Disclosed are a method and a device for transmitting or receiving a PUSCH 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: receiving first configuration information related to a sounding reference signal (SRS) from a base station; receiving downlink control information (DCI) for PUSCH scheduling from the base station; and transmitting the PUSCH to the base station. On the basis that the first configuration information includes information relating to multiple SRS resource sets, the PUSCH is transmitted at N (N is a natural number) transmission occasions (TOs), and the DCI includes multiple SRS resource indicator (SRI) fields, the PUSCH may be transmitted at each of the TOs on the basis of an SRS resource in an SRS resource set identified by one SRI field among the multiple SRI fields related to each of the TOs.

Various embodiments herein provide techniques for positioning measurements in a wireless cellular network when a user equipment (UE) is in a radio resource control (RRC) inactive state or a RRC idle state. For example, the UE may transmit a sounding reference signal (SRS) for positioning measurements while the UE is in the RRC inactive state or RRC idle state. The SRS may be a semi-persistent SRS and may be transmitted after an activation delay from receipt of a message (e.g., medium access control (MAC) control element (CE)) that activates the SRS. Additionally, or alternatively, the UE may perform a positioning reference signal (PRS) measurement while in the RRC inactive state or the RRC idle state. The PRS measurement may have a reduced number of measurement samples. Other embodiments may be described and claimed.

A method and system are disclosed for optimizing downlink multi-user multiple-input multiple-output (MU-MIMO) transmission in time division duplex (TDD) wireless communication systems. Sounding reference signals (SRS) from user equipment (UEs) are processed using a machine-learned model to extract physical-layer channel characteristics, including Doppler spread, delay profile, and signal-to-noise ratio (SNR). Based on these features, a channel state information (CSI) acquisition operation is adaptively selected for each UE—either channel estimation (CE) alone or both CE and channel prediction (CP). When CP is used, prior channel estimates are analyzed to generate predicted CSI over a future interval. The obtained CSI is then used to configure MU-MIMO transmission parameters such as beamforming weights, modulation and coding schemes (MCS), and UE grouping. This adaptive framework improves performance in time-varying and high-mobility environments by ensuring timely and reliable CSI is used for downstream transmission decisions.

Methods, systems, and devices for wireless communications are described. Techniques described herein provide for avoiding sounding reference signal (SRS) and paging occasion collisions. In some examples, a user equipment (UE) may receive first control signaling indicating a set of SRS resources associated with a first subscriber identity associated with the UE. The UE may receive second control signaling indicating a first set of paging occasions and a set of synchronization signal block (SSB) occasions associated with a second subscriber identity associated with the UE. A first serving SSB may be associated with one of the SSB occasions. The UE may transmit, in accordance with a scheduling overlap in time between a SRS resource of the set of SRS resources and a paging occasion of the first set of paging occasions, an indication of a transition of the second subscriber identity from the first serving SSB to a second serving SSB.

Aspects relate to dynamic sounding reference signal (SRS) slot offset indication in a wireless communication system using aperiodic SRS. An indicator field is utilized to signal the slot offset indication to a user equipment (UE). Other aspects, embodiments, and features are also claimed and described.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a first capability message to a network entity indicating that the UE may be capable of using a subset of antenna ports of a set of antenna ports for uplink sounding on a wireless band. Further, one or more antenna ports of the set of antenna ports may be available for the uplink sounding and the first capability message may include an indication of the set of antenna ports. The UE may then receive control signaling from the network entity indicating the subset of antenna ports that the UE should use for the uplink sounding based on the first capability message. As such, as part of the uplink sounding on the wireless band, the UE may transmit one or more sounding reference signals (SRSs) via the subset of antenna ports indicated by the control signaling.

Method, systems and devices for wireless communication. The method includes performing sounding reference signal (SRS) transmission between a user equipment and a network base station by obtaining a first transmit power of a first SRS resource and determining a second transmit power of a second SRS resource based on the first transmit power of the first SRS resource of a same SRS resource set; transmitting N sets of parameters corresponding to a SRS resource set between the network base station and the user equipment; or transmitting M sections of frequency sounding at a symbol between the user equipment and the network base station, wherein each section of the M sections comprises consecutive physical resource blocks (PRBs), M being a positive integer.

A method performed by a user equipment, UE (112), includes: receiving information indicating a configuration of a pair of sounding reference signal, SRS, resource sets, the pair including a first SRS resource set and a second SRS resource set, the first SRS resource set including one or more SRS resources associated with a symbol type corresponding to SBFD symbols and the second SRS resource set including one or more SRS resources associated with a symbol type corresponding to non-SBFD symbols; receiving information for a physical uplink shared channel, PUSCH, transmission; selecting a selected SRS resource based on a symbol type associated with the symbols for the PUSCH transmission; and transmitting the PUSCH transmission according to the selected SRS resource.

A user equipment (UE) in a wireless network may receive Downlink Control Information (DCI) that schedules Physical Uplink Shared Channel (PUSCH) for non-codebook-based and / or codebook-based PUSCH operation. The UE may be configured with a Sounding Reference Signal (SRS) resource set for each codebook-based operation and non-code-book-based operation. The UE may transmit using a codebook base operation in a first set of PUSCH occasions and transmit using a non-code-book-based operation in a second set of PUSCH occasions. The DCI may include multiple SRS Resource Indicator (SRI) fields pertaining to different sets of PUSCH occasions. Similarly, DCI may include information pertaining to a number of layers for precoding for a set of PUSCH occasions.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose a method and a base station (100) for managing sounding reference signal (SRS) transmission in a wireless communication. The method includes receiving the SRS transmitted from a group of user equipments (UEs) (200a-200d) in the wireless communication over same time-frequency resource. The method also determines the transmission variant by decoding the SRS. Further, the method includes performing one of: estimating at least one channel of receiving the SRS from each UE of the group of UEs (200a-200d) in the slot using a first receiver when the transmission variant is one of the C-CDM-C-CS variant or the V-CDM-C-CS variant, and estimating at least one channel of receiving the SRS from each UE of the group of UEs (200a-200d) in the slot using a second receiver when the transmission variant is one of the C-CDM-C-CS variant or the C-CDM-V-CS variant.

A cellular base station (BS) which determines an aperiodic sounding reference signal (SRS) triggering offset configuration specifying an offset between an aperiodic SRS trigger received by a user equipment (UE) and transmission of the SRS by the UE. The cellular base station may determine that the SRS triggering offset should be adjusted. In response, the cellular base station may transmit signaling to the UE specifying a new value for the aperiodic SRS triggering offset. The new SRS triggering offset value may be partly based on a minimum timing offset for the UE and may be contained in a medium access control (MAC) control element (CE) or in downlink control information (DCI). Additionally, the new triggering offset value may be applicable for a plurality of component carriers or bandwidth parts. The cellular base station may also determine a new triggering offset value due to conflicts regarding the AP-SRS transmission.

Methods, systems, and devices for designing and configuring reference signals in wireless communication systems are disclosed. An example method for wireless communication includes transmitting, by a wireless device to a network node, a sounding reference signal (SRS), where the SRS is determined by a first parameter and a cyclic shift parameter, and a value of the first parameter hops at a level of a first type of time unit and a value of the cyclic shift parameter hops at a level of a second type of time unit. Another example method for wireless communication includes receiving, by a wireless device from a network node, a configuration for an SRS resource, and transmitting an SRS in the SRS resource, where the configuration includes information associated with one or more time-domain orthogonal cover codes (TD-OCC) or a multiplexing type for multiple SRS ports in the SRS resource.