Abstract: A method of estimating beamforming weights, the method including receiving a Sounding Reference Signal (SRS) at an Open Radio Access Network (O-RAN) Distributed Unit (O-DU); performing channel estimation of the SRS received; computing a time domain response on the SRS channel estimation at a level of granularity as defined by a bandwidth of the SRS; determining a timing offset at the defined level of granularity; compensating for the timing offset at the defined level of granularity; estimating the beamforming weights according to the compensated timing offset; and transmitting the estimated beamforming weights to an O-RAN Radio Unit (O-RU) over a fronthaul interface between the O-DU and the O-RU.

Abstract: A method and Radio Access Network (RAN) Intelligent Controller (RIC) modeling interference patterns in a Massive Multiple Input, Multiple Output (MIMO) network. Information associated with beams transmitted in an Open RAN (O-RAN) is obtained. An interference matrix identifying interference patterns is generated based on the information associated with the beams transmitted in the O-RAN. One or more optimization solutions are determined based on the interference patterns identified in the interference matrix. One or more signals are sent to one or more elements in the O-RAN to implement the one or more optimization solutions.

Abstract: Techniques for selecting layers and ports for Multiple-Input-Multiple-Output (MIMO) beamforming are provided. In some implementations, the techniques may include receiving a plurality of Sounding Reference Signals (SRSs) transmitted by a plurality of SRS ports, each of the plurality of SRSs corresponding with a SRS port of a UE. In addition, the techniques may include measuring a Signal-to-Noise Ratio (SNR) for each of the plurality of SRS ports, and estimating a wideband channel port correlation matrix across the plurality of SRS ports. The techniques may include setting a correlation threshold and a SNR threshold. Further, the techniques may include selecting one or more SRS ports from the plurality of SRS ports that satisfy a condition of being equal to or less than the correlation threshold and equal to or greater than the SNR threshold, where the layers correspond with a total number of SRS ports that satisfy the above condition.

Abstract: A method and Radio Access Network (RAN) Intelligent Controller (RIC) modeling interference patterns in a Massive Multiple Input, Multiple Output (MIMO) network. Information associated with beams transmitted in an Open RAN (O-RAN) is obtained. An interference matrix identifying interference patterns is generated based on the information associated with the beams transmitted in the O-RAN. One or more optimization solutions are determined based on the interference patterns identified in the interference matrix. One or more signals are sent to one or more elements in the O-RAN to implement the one or more optimization solutions.

Abstract: A method, a system, and a computer program for performing beam space compression. At least one signal is received at a first communication device. The first communication device is communicatively coupled to a second communication device using at least one communication interface. One or more beamforming coefficients are generated for transmission of the received at least one signal to the second communication device using one or more first antenna ports of the first communication device. One or more multi-dimensional, multi-domain compression is applied to the generated one or more beamforming coefficients. The received signal is transmitted using one or more first antenna ports associated with the one or more compressed beamforming coefficients to the second communication device.

Abstract: Various solutions for reporting hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for different service types with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive downlink control information (DCI). The apparatus may determine a service type according to the DCI. The apparatus may select a physical uplink control channel (PUCCH) resource according to the service type. The apparatus may transmit HARQ-ACK information in the PUCCH resource.

Abstract: Various solutions for enhancing time domain-resource allocation (TD-RA) framework with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive an indication of a reference point. The apparatus may determine a start symbol position according to the reference point rather than a slot boundary. The apparatus may determining a TD-RA according to the start symbol position. The apparatus may perform a transmission according to the TD-RA.

Abstract: Various solutions for enhancing uplink control information (UCI) and physical uplink control channel (PUCCH) transmission with respect to user equipment and network apparatus in mobile communications are described. An apparatus may generate a plurality of channel state information (CSI) reports. The apparatus may determine a priority of each of the plurality of CSI reports according to a service type. The apparatus may detect a collision between at least two CSI reports. The apparatus may transmit a CSI report with a higher priority to a network node.

Abstract: Various solutions for enhancing time domain-resource allocation (TD-RA) framework with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive an indication of a reference point. The apparatus may determine a start symbol position according to the reference point rather than a slot boundary. The apparatus may determining a TD-RA according to the start symbol position. The apparatus may perform a transmission according to the TD-RA.

Abstract: Various solutions for configuring time domain-resource allocation (TD-RA) for different service types with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a configuration of a plurality of TD-RA tables from a network node. The apparatus may activate at least one of the plurality of TD-RA tables. The apparatus may determine an allocated resource according to the activated at least one of the plurality of TD-RA tables. The apparatus may perform a transmission on the allocated resource.

Abstract: Various solutions for reporting hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for different service types with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive downlink control information (DCI). The apparatus may determine a service type according to the DCI. The apparatus may select a physical uplink control channel (PUCCH) resource according to the service type. The apparatus may transmit HARQ-ACK information in the PUCCH resource.