Abstract: A method for channel state information. The method which may be performed by a terminal device comprises receiving a channel state information request from a network node. The method further comprises transmitting a channel state information report to the network node in a random access procedure, in response to the channel state information request. The method can be supported in a random access procedure to request and/or report channel state information in a more flexible manner, so that the network performance and transmission efficiency can be improved.

Abstract: Methods and apparatuses are disclosed for Physical Uplink Shared Channel (PUSCH) Demodulation Reference Signal (DMRS) design in, e.g., 2-step random access. In one embodiment, a wireless device configured to communicate with a network node is provided. The wireless device is configured to: receive an indication indicating at least one Demodulation Reference Signal, DMRS, parameter for a physical uplink shared channel, PUSCH in a 2-step random access procedure where the at least one DMRS parameter indicating a plurality of DMRS ports, and determine a subset of the plurality of DMRS ports for the PUSCH in the 2-step random access procedure.

Abstract: A method, in a radio network node, comprises identifying, among a predetermined codebook of precoding matrix codewords, a subset of precoding matrix codewords that are not to be reported by the wireless device in channel-state-information, CSI, feedback, and transmitting, to the wireless device, a bitmap identifying the subset of precoding matrix codewords that are not to be reported by the wireless device; where each bit in the bitmap corresponds to only one combination of a first dimension index l?1 and a second dimension index l?2 out of the possible combinations of the first dimension index l?1 and the second dimension index l?2, and where the first dimension index l?1 and the second dimension index l?2 identify a two-dimensional beam, the two-dimensional beam being defined by a vector of complex numbers comprised within at least one column of a precoding matrix codeword in the codebook.

Abstract: Systems and methods for multi-beam Channel State Information (CSI) reporting are provided. In some embodiments, a method of operation of a second node connected to a first node in a wireless communication network for reporting multi-beam CSI includes reporting a rank indicator and a beam count indicator in a first transmission to the first node. The method also includes reporting a cophasing indicator in a second transmission to the first node. The cophasing indicator identifies a selected entry of a codebook of cophasing coefficients where the number of bits in the cophasing indicator is identified by at least one of the beam count indicator and the rank indicator. In this way, feedback for both a rank indicator and a beam count indicator may be possible which may allow robust feedback and variably sized cophasing and beam index indicators.

Abstract: Methods and apparatuses are disclosed for PUSCH resource selection in 2-step random access (RA). In one embodiment, a wireless device is configured to receive a two-step RA configuration having: a first resource allocation for a PUSCH transmission of a first message, msgA, of the two-step RA procedure, the first resource allocation for the PUSCH transmission of the msgA being associated with a first set of preambles; and a second resource allocation for the PUSCH transmission of the msgA associated with a second set of preambles; select one of the first and second resource allocation and the associated one of the first and second set of preambles based on the two-step RA configuration and a payload size of the PUSCH transmission of the msgA; and transmit the PUSCH transmission of the msgA using the selected one of the first and second resource allocation.

Abstract: A user equipment (UE) (200, 500, 1530) transmits data to a base station (100, 500, 1520) in a wireless communication network. The UE (200, 500, 1530) comprises multiple antenna ports, and selects a precoding matrix from a respective first, second, third, or fourth set of precoding matrices according to a number of spatial layers. The first, second, third, and fourth sets of precoding matrices are available for all coherence capabilities and are comprised within a larger set of precoding matrices. The larger set comprises precoding matrices that are not available for all coherence capabilities. The first, second, third, and fourth sets of precoding matrices correspond to one, two, three, or four spatial layers, respectively. The number of columns in the selected precoding matrix is equal to the number of spatial layers and each column comprises a single non-zero element and one or more zero elements.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for random access procedure. A method at a user equipment (UE) comprises selecting a synchronization signal and physical broadcast channel block (SSB) with a signal measured metric satisfying a criterion. The method further comprises transmitting a first message including a random access channel (RACH) preamble on a RACH occasion and data on an uplink shared channel (USCH) to a base station. The RACH preamble and the RACH occasion are selected based on a mapping of the SSB to the RACH preamble and the RACH occasion. The method further comprises receiving a second message from the base station as a response to the first message.

Abstract: Systems and methods for mixed space time and space frequency block coding are provided. In some embodiments, a method of operating a first node in a wireless communication network for providing time and frequency diversity includes precoding modulation symbols intended for a second node according to two antenna ports on which they are to be transmitted. In a first subset of Orthogonal Frequency-Division Multiplexing (OFDM) symbols, mapping the precoded modulation symbols to resource elements starting first with indices corresponds to frequency. In a different subset of OFDM symbols, mapping the precoded modulation symbols to resource elements in any two adjacent OFDM symbols starting first with indices corresponds to time. In this way, transmission efficiency may be increased by not having any resource elements unused. Additional flexibility for precoding may also be provided when there is no symbol pair mapped to resource elements across two resource blocks.

Abstract: A network node, wireless device, base station, user equipment and corresponding methods are provided. The network node includes processing circuitry configured to: select a first set and second set of reference signal resources in a subframe and aggregate the first set and second set of reference signal resources in the subframe to form a code division multiplexing, CDM, aggregation configuration. The first set and second set of reference signal resources in the subframe satisfy a temporal criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum time separation of six OFDM symbols. The first set and second set of reference signal resources in the subframe satisfy a frequency criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum frequency separation of six subcarriers.

Abstract: A technique for allocating transmit power for uplink, UL, radio transmission is described. As to a method aspect, a method of allocating transmit power for at least two UL transmissions on one or more cells (302, 304) of a radio access network, RAN, is provided. The method comprises or initiates the step of allocating (202) the transmit power for the UL transmissions. A total transmit power resulting from the allocation is less than or equal to a maximum transmit power by allocating the transmit power to the UL transmissions according to a priority order of the UL transmissions. At least one UL transmission of a low-latency communication is prioritized over at least one UL transmission of a regular communication according to the priority order.

Abstract: Systems and methods for reducing cross-link interference in a wireless system are disclosed. In some embodiments, a method of operation of a wireless device in a wireless system comprises receiving, from a serving Access Point (AP), wireless device specific Sounding Reference Signal (SRS) or Demodulation Reference Signal (DMRS) configuration information for one or more potential aggressor wireless devices. The method further comprises performing one or more measurements on at least one of the one or more potential aggressor wireless devices using the wireless device specific SRS or DMRS configuration information for the at least one of the one or more potential aggressor wireless devices and reporting at least one of the one or more measurements to the serving AP. In this manner, cross-link interference measurement and reporting is enabled.

Abstract: System and method for flexible channel state information-reference signal transmission A method by a wireless device is provided for restricting channel state information (CSI) measurement. The method includes receiving, from a network node, information identifying a first subset of channel state information-reference signal (CSI-RS) resources to be used in performing CSI measurements. The first subset of CSI-RS resources are associated with a first portion of a frequency band that is less than all of the frequency band. CSI measurements are performed in the first subset of CSI-RS resources that are associated with the first portion of the frequency band.

Abstract: A method for random access which may be performed by a terminal device comprises receiving configuration information for a random access procedure from a network node. The method further comprises determining an association between random access resource and shared channel resource for the random access procedure, according to the configuration information. The association is based at least in part on a configuration of the shared channel resource. An association between signaling transmissions in a random access procedure can be configured flexibly and efficiently.

Abstract: A method for random access which may be performed by a network node comprises determining an association between a downlink transmission and an uplink transmission (e.g. an association between a synchronization signal and physical broadcast channel block and a random access occasion) in a two-step random access procedure, based at least in part on random access resource configuration for the two-step random access procedure (e.g. based at least in part on whether random access resource is shared by the two-step random access procedure and a four-step random access procedure). The method further comprises transmitting information indicating the association to a terminal device. Accordingly, an association between a synchronization signal and physical broadcast channel block and a random access occasion in a two-step random access procedure can be configured flexibly and efficiently.

Abstract: Network nodes, wireless devices and methods of reducing signaling overhead are provided. In one embodiment, a method includes transmitting to the wireless device at least one power threshold parameter to be used by the wireless device to determine a number of beams to be included in a multi-beam precoder codebook and transmitting to the wireless device a signal to interference plus noise ratio (SINR) to be used by the wireless device to determine to use one of a single beam precoder and a multiple beam precoder.

Abstract: A wireless device, network node and methods are provided. The network node includes processing circuitry configured to configure an aperiodic sounding reference signal, A-SRS, switching trigger, and transmit the configured A-SRS 5 switching trigger to a wireless device. The A-SRS switching trigger is one of: a downlink control information, DCI, of a predetermined DCI format and a DCI of another predetermined DCI format for group switching. In one embodiment, the predetermined DCI format is one of 2, 2A and 3, and the other predetermined DCI format for group switching is 1A.

Abstract: A method, system, network node and wireless device are disclosed. In one or more embodiments, A network node configured to communicate with a wireless device is provided. The network node includes processing circuitry configured to transmit a first configuration for prioritized 2-step random access, RA, signaling where the first configuration includes at least a power ramping step and is separately configured from a second configuration for RA signaling, and perform the prioritized 2-step RA signaling based on the power ramping step of the first configuration.

Abstract: A method for random access which may be performed by a terminal device comprises receiving, from a network node, information indicating an association between a downlink transmission and an uplink transmission (e.g. an association between a synchronization signal and physical broadcast channel block and a shared channel occasion) in a random access procedure. The association is based at least in part on configuration of random access resource (e.g. a random access occasion) and shared channel resource (e.g. the shared channel occasion) for an uplink message (e.g. including a preamble and physical uplink shared channel data) in the random access procedure. An association between a synchronization signal and physical broadcast channel block and a shared channel occasion in a random access procedure can be configured flexibly and efficiently.

Abstract: The present disclosure provides a method in a User Equipment of transmitting a random access preamble and a physical uplink shared channel, comprising: determining a resource size to be used to contain the physical uplink shared channel, the resource size being one of a set of predetermined sizes; identifying a resource to be used from a predetermined set of resources, the resource in the set of resources corresponding to the determined resource size, each resource being identified with a respective first index n and occupying a distinct set of OFDM symbols and subcarriers; identifying a PRACH preamble with a second index n? corresponding to the first index n of the identified resource; and transmitting the identified PRACH preamble, and the physical uplink shared channel in the identified resource.

Abstract: Embodiments of the present disclosure relates to a method, apparatus for monitoring PDCCH in random access procedure. The method performed by a terminal device comprises: obtaining (S101) a first configuration for a first physical downlink control channel, PDCCH; transmitting (S102) a message for requesting a random access, RA; monitoring (S103) the first PDCCH, based on the first configuration; and receiving (S104) a message on a physical downlink shared channel, PDSCH, based on information in the first PDCCH obtained during the monitoring; wherein the message for requesting the RA includes a random access channel, RACH, preamble and a physical uplink shared channel, PUSCH. According to embodiments of the present disclosure, the monitoring of PDCCH may be achieved in a RACH procedure different with 4-step RACH procedure, such as in a 2-step RACH procedure.