Abstract: There is provided an apparatus, comprising means for: transmitting (210), to a network node, an indication that a plurality of timing advance loops are supported; receiving (220), from the network node, a configuration for measuring downlink reference signals; performing (230) measurements on the downlink reference signals according to the configuration; determining (240), based on the measurement, that at least one additional timing advance loop is needed for transmission of a plurality of candidate uplink beams; and transmitting (250), to the network node, an indication that at least one additional timing advance loop is needed for transmission of the plurality of candidate uplink beams.

Abstract: Systems, methods, apparatuses, and computer program products for fast downlink beam switching assumptions related to quasi-colocation are provided. For example, a method can include determining whether a reported downlink reference signal corresponds to a reference signal, based on a spatial reception parameter corresponding to channel conditions and supporting beamforming, with a resource set that is configured to a user equipment with a tracking reference signal parameter. The method can also include interpreting a downlink reception parameter based on the determination regarding the reported downlink reference signal. The method can further include controlling at least a receive beam or a transmit beam of the user equipment based on the interpretation of the downlink transmission configuration indicator state.

Abstract: Embodiments of the present disclosure provide a method for improved transmission configurations for phase tracking reference signals (PTRS) associated with demodulation reference signal (DMRS) ports multiplexed with one or more DMRS ports via time domain orthogonal cover codes (TD-OCC). The method includes receiving, from a network element, a first indication indicating whether transmission of a PTRS associated with a first DMRS port associated with a first DMRS is enabled in an apparatus, where the first DMRS port is multiplexed with one or more DMRS ports via TD-OCC. The method also includes determining, based at least in part on the first indication, that the apparatus is enabled to transmit the PTRS. The method also includes, in response to determining that the apparatus is enabled to transmit the PTRS, causing transmission of the PTRS to the network element.

Abstract: Disclosed is inter alia a user equipment, comprising means for: —receiving, from a network node, a first configuration for at least one uplink reference signal to be transmitted through at least one respective antenna port of the user equipment, wherein the first configuration comprises a first set of resource blocks over which the at least one uplink reference signal is to be transmitted; —determining whether sufficient power headroom is available at the user equipment to compensate for at least one first insertion loss to be incurred within the user equipment by the at least one respective uplink reference signal transmitted according to the first configuration; —if it is determined that sufficient power headroom to compensate for the at least one first insertion loss is not available, transmitting, to the network node, a re-configuration request for the at least one uplink reference signal; —receiving, from the network node in response to the re-configuration request, a second configuration for the at leas

Abstract: Disclosed are methods and apparatus for correspondence between downlink reference signals and uplink reference signals. A terminal device in a communication network may comprise at least one processor and at least one memory having computer program code stored thereon. The at least one memory and the computer program code may be configured, with the at least one processor, cause the terminal device to perform: transmitting, to a network device, information indicative of support of antenna port correspondence between antenna ports used for reception of downlink (DL) reference signal (RS) resources and antenna ports used for transmission of uplink (UL) reference signal resources at the terminal device: receiving, from the network device, a request for use of the antenna port correspondence at the terminal device: and transmitting, to the network device, a message indicating usage of the antenna port correspondence at the terminal device.

Abstract: User equipment comprising: means configured to: report, to a network, antenna-switching configurations for the user equipment: receive, from the network, a configuration of sounding reference signal (SRS) resources; and transmit, in parallel, a first SRS using a first SRS resource of the SRS resources to a first transmission-reception point (TRP) and a second SRS of the SRS resources using a second SRS resource to a second TRP.

Abstract: A method including: determining, with a user equipment, an uplink transmission power control mode from at least two possible different uplink transmission power control modes for antenna ports of the user equipment, where the antenna ports comprise at least two antenna ports; and sending, to a network equipment, information regarding the determined uplink transmission power control mode.

Abstract: A method comprising transmitting beam cluster information to a user equipment, the beam cluster information defining a plurality of beam clusters and beam identification information for each of a plurality of beams in a respective beam cluster of the plurality of beam clusters; and transmitting, to the user equipment, at least one beam based on the beam cluster information.

Abstract: A mapping is selected, for DMRSs for one or more transmissions on a channel, using information for ranks higher than four that has ports assigned for the DRMSs mapped to different codewords and to different CDM groups. Layers are distributed over the CDM groups. The DMRSs are transmitted on the channel.

Abstract: Techniques are provided for facilitating simultaneous uplink sounding reference signal transmissions from user equipment. In relation to a base station, a method includes causing transmission of configuration indication state (TCI-state) information to be provided to at least one user equipment (UE). The TCI-state information includes information regarding a current TCI-state. In conjunction with the TCI-state information, the method includes causing one or more initialization parameters specific to the TCI-state to be provided for at least one uplink sounding reference signal (UL SRS) transmission with comb-offset hopping and/or cyclic-shift hopping. Corresponding methods, apparatus and computer program products are also provided for a base station and user equipment.

Abstract: Systems, methods, apparatuses, and computer program products for facilitating triggered PDCCH-ordered PRACH transmissions in multi-TRP scenarios. One method may include a UE determining that a first TCI state is to be applied in a first slot and a second TCI state is to be applied in a second slot. The first TCI state is associated with a first TAG ID, a second TCI state is associated with a second TAG ID different than the first TAG ID, and the second slot is succeeding and adjacent to the first slot. The method may further include, based upon the determining, transmitting or dropping at least one of at least one uplink transmission in the first slot or at least one uplink transmission in a second slot.

Abstract: Systems, methods, apparatuses, and computer program products for facilitating triggered PDCCH-ordered PRACH transmissions in multi-TRP scenarios. One method may include a UE determining that a first TCI state is to be applied in a first slot and a second TCI state is to be applied in a second slot. The first TCI state is associated with a first TAG ID, a second TCI state is associated with a second TAG ID different than the first TAG ID, and the second slot is succeeding and adjacent to the first slot. The method may further include, based upon the determining, determining a third slot. The second TCI state is firstly to be applied in the third slot. The method may further include applying the second TCI state from the third slot onward.

Abstract: A method performed by a user device, including performing the steps of: receiving, from a network entity, one or both of: at least one resource of at least one downlink reference signal, and an indication; triggering switching, from a first association to a second association between at least two CORESETPoolIndex values and at least two sounding reference signal resource sets, based on a determination of one or both of: a measured value of the at least one DL reference signal and the indication; and transmitting respectively, to the network entity, corresponding resources of one or more sounding reference signals that correspond to the second association after the switching.

Abstract: Example embodiments of the present disclosure relate to an apparatus receiving an instruction to perform interchanging of an association of coreset pool indices with sounding reference signal (SRS) resource sets. The apparatus interchanges an association of a first coreset pool index with a first SRS resource set of the SRS resource sets and an association of a second coreset pool index with a second SRS resource set of the SRS resource sets to an association of the first coreset pool index with the second SRS resource set and an association of the second coreset pool index with the first SRS resource set. The apparatus transmits one or more SRS transmissions associated with the first or second coreset pool index and/or a physical uplink shared channel (PUSCH) transmission based on an SRS resource indicator (SRI) associated with the first or second coreset pool index, in accordance with the interchanged association.

Abstract: Example embodiments of the present disclosure relate to methods and apparatuses for codebook-based uplink transmission. A first apparatus obtains a codepoint value and determines at least one table entry for precoding based on the codepoint value. The codepoint value indicates selection of a transmission mode and one or multiple maximum ranks, and at least a maximum rank of a first codepoint value is different from a maximum rank of a second codepoint value. Through this solution, multi-panel simultaneous transmission in the scenarios of single and multiple transmission-reception points (TRPs) can be supported in a simple and easily adoptable way.

Abstract: Multi-cell physical uplink shared channel scheduling with sounding reference signal resource sets is provided. The method may include receiving, from a network entity, a first configuration for multi-cell physical uplink shared channel scheduling for a set of cells and receiving a second configuration that includes at least two uplink sounding reference signal resource sets for at least one serving cell of the set of cells. At least two uplink sounding reference signal resource sets may include information relating to usage of codebook and/or non-codebook based physical uplink shared channel transmission. The method also includes receiving a scheduling message indicating to transmit one or more respective physical uplink shared channels on one or more cells, and determining one SRS resource set for the PUSCH transmission including one or more repetitions for the at least one serving cell of the set of cells.

Abstract: Embodiments of the present disclosure relate to methods and apparatus for beam maintenance in a radio access network, in particular, through random access preamble transmission for beam maintenance. A terminal device receives, from a network device, a resource configuration for contention-free random access. The resource configuration indicates a plurality of CFRA resources each associated with a respective synchronization signal and physical broadcast channel block index or channel state information reference signal index. The plurality of CFRA resources are applicable for timing advance acquiring in a target network device. The terminal device transmits, to the target network device, one or more CFRA physical random access channels based on the resource configuration. In this way, beam maintenance may be performed based on an SSB index or CSI-RS index associated with one of the transmitted CFRA PRACH(s) before a cell switch command or a random access response.

Abstract: Embodiments of the present disclosure relate to timing adjustment. A terminal device performs timing advance (TA) acquisition on at least one target cell for cell switching from a serving cell for the terminal device to one of the at least one target cell. Then, the terminal device adjusts downlink timing of the at least one target cell, when a timer is running at the terminal device. As a result, it is allowed to efficiently control downlink timing maintenance burden at the terminal device.

Abstract: Devices, methods and computer program products for beam ranking for positioning purposes are disclosed. A network node device transmits to a client device a beam ranking indication comprising beam specific first reference data and beam ranking criteria for positioning for downlink transmission beams between the network node device and the client device. In response to a received downlink transmission beam selection indication indicating a downlink transmission beam selected by the client device based on the transmitted beam ranking indication, the network node device transmits second reference data to the client device with at least one downlink transmission beam according to the received downlink transmission beam selection indication.

Abstract: Disclosed is a method comprising obtaining one or more antenna-port-specific repetition patterns and/or one or more antenna-port-specific uplink power control target values for a plurality of antenna ports; and transmitting an uplink reference signal by applying antenna switching to at least a subset of the plurality of antenna ports based at least partly on the one or more antenna-port-specific repetition patterns and/or the one or more antenna-port-specific uplink power control target values.