Abstract: A system and method for reducing bottleneck queues in the Open Radio Access Network (O-RAN) architecture through classification of Packet Data Convergence Protocol (PDCP) and Radio Link Control (RLC) queues at the Centralized Unit-User Plane (CU-UP). The system analyzes and determines a category for the CU-UP PDCP queue for the Data Radio Bearer (DRB), x, at the CU-UP and analyzes and determines a category for the DU RLC queue for the DRB, x, at the CU-UP. If the Congestion Indicator indicates Congestion Experienced (CE) for this DRB in the RAN, the system at the CU-UP starts inserting CE in the IP packet header for packets going in the reverse direction towards the application source, which in turn will modify the rate of transfer based on the number and duration of CE received.

Abstract: A system and method for reducing bottleneck queues in the O-RAN architecture through classification of a PDCP queue at a CU-UP server with a CU Congestion Indicator, and classification of a RLC queue at a DU server with a DU Congestion Indicator. The CU Congestion Indicator determines a category for the PDCP queue for a DRB, x and the DU Congestion Indicator determines a category for the RLC queue for a DRB, y. The DU server transmitting the CE indication to UE when the CU Congestion Indicator or the DU Congestion Indicator classifies the DRB x or DRB y as CE, which in turn, communicates a congestion occurrence to an application source. The application source modifies a data rate for data traffic that is sent to the UE based on the CE indication.

Abstract: A method of implementing data traffic overload control utilizing an E2 node for i) a stand-alone (SA) 4G or 5G architecture wireless network, and a non-stand-alone (NSA) architecture wireless network, the method including: detecting an overload condition at the E2 node; and performing an overload control action including: i) reducing a number of UEs for which corresponding scheduling metric is computed in each transmission time interval (TTI); ii) reducing a number of UEs for which UL grant is given; iii) reducing a size of UL grant given to each UE; (iv) reducing the amount of radio resource the E2 node provides to each cell; (v) dynamically allocating increased buffer spaces to radio link control (RLC) queues in the DU; (vi) reducing an activity factor for selected data radio bearers (DRBs); and (vii) adjusting relative data transmission rates between a 4G leg and a 5G leg of data transmission.

Abstract: Described are systems and methods for a cellular communication. These include a group of gNBs, DUs, and CUs, each with multiple sectors, communicating with a set of UEs; each CU/DU/gNB being configured to operate in a separate server or a same server, and each CU/DU/gNB being configured to be physically located at a same place or different places; each of the set of UEs comprising a plurality of SCELLs running in different DUs, whereby a pDU MAC (PCELL MAC) module is configured to operate in one DU and a sDU MAC (SCELL MAC) module is configured to operate in a different one of the DUs; an a MAC module in each DU is configured to exchange a message with a peer DU MAC module for a seamless data transfer for supporting inter DU/vDU carrier aggregation for a UE of the set of UEs.

Abstract: A method for enhanced radio resource management of radio access network (RAN) based on machine-learning-based technique includes: deploying a trained machine-learning-based model trained on a plurality of RAN-related parameters for a selected user equipment (UE) on the RAN, including i) plurality of trained weights for determining scheduling priority of the selected UE, ii) a network operator policy influencing scheduling priority of the selected UE, and iii) at least one of Packet Delay Budget (PDB), a target guaranteed bit rate (GBR), and proportional fair (PF) metric of the selected UE; computing, at the RIC, a difference between two consecutive overall error functions for PDB, GBR, and PF calculated based on corresponding observed values at two consecutive sampling time points; and updating, at the RIC, the plurality of weights based on the difference between the first and second overall error functions.

Abstract: There is provided a method of operating an Open Radio Access Network (O-RAN). The method includes (a) communicating from an O-RAN radio unit (O-RU) to an O-RU controller, data informing that the O-RU supports physical random-access channel (PRACH) combining, (b) communicating from the O-RU controller to the O-RU, a parameter to facilitate the PRACH combining, and (c) configuring the O-RU in accordance with the parameter. There is also provided an O-RU and an O-RU controller that perform the method.

Abstract: There is provided, an open radio access network distributed unit (O-DU) having an electronic module that performs an FS-8 Radio Access Technology (RAT) functionality such as frequency hopping, downlink (DL) carrier aggregation, uplink (UL) channelization, power control, and fast automatic gain control (AGC).

Abstract: A method for time sensitive network (TSN) operation includes: in the case of data traffic stoppage in a communication channel of TSN due to at least one of down time of a user plane (UP) connection and a reset of the UP connection, performing the following: generating, by a user plane function (UPF), an audit report about the at least one of the down time and the reset; sending, by the UPF, the audit report to a first element in control plane (CP), without waiting for communication from the CP; and determining, by one of the first element or a second element in the CP, survival time of the communication channel. The audit report is sent along with a report type indicating the down time of the UP connection due to connection fluctuation or a switch-over of the UP connection from a primary UPF to a back-up UPF.

Abstract: A control plane signaling method for reducing energy consumption of O-RAN radio units used in O-RAN CUS and including an O-DU controlling an O-RU via control-plane messaging where a sleep period is extended using a 16-bit binary number that is formed by two reserved octets in Section Type 0, or via an inactivity timer is used to trigger transitions between different sleep states and active states, or via and a bitmap is formed by a reserved octet in Section Type 0 and is used to signal the O-RU to directly transition to different sleep modes.

Abstract: A method for facilitating an on-demand multimedia priority service (MPS) for a data transport services (DTS) session to receive end to end prioritization within 5G Core (5GC) and radio access network (RAN) is provided. The method includes: propagating an MPS On-Demand indication to 5GC network functions and RAN via (a) Policy Control Function sending an MPS On-Demand indication to Session Management Function (SMF) when a authorized user initiates such a service usage, (b) SMF recording the on session demand status and sending the MPS On-Demand indication to an Access and Mobility Management Function (AMF), and (c) AMF, in response to receiving the MPS On-Demand indication, upgrading the user for multimedia priority services in the 5G core based on policy, and sending to user equipment (UE), an MPS indicator in downlink Non-Access Stratum (NAS) messaging to indicate that the UE may use MPS access identity to receive radio access prioritization.

Abstract: There is provided a method for sharing bandwidth consumption information in a communication system having a first user plane function (UPF), a second UPF and a third UPF, each of which serves an access point name (APN). The method includes (a) receiving by the first UPF from the second UPF, information indicating a bandwidth being consumed by the second UPF, (b) receiving by the first UPF from the third UPF, information indicating a bandwidth being consumed by the third UPF, (c) sending from the first UPF to the second UPF, information indicating a bandwidth being consumed by the first UPF and the third UPF, and (d) sending from the first UPF to the third UPF, information indicating the bandwidth being consumed by the first UPF and the second UPF. Thus, each of the first, second and third UPFs is aware of a total bandwidth being consumed for the APN.

Abstract: System and Methods for configuring shared spectrum cellular systems with Physical Resource Block Blanking and related operations for the control and data channels and reference signals within the carrier channel bandwidth. The systems are configured for protection in the carrier bandwidth to avoid victim interference mitigation.

Abstract: There is provided an Open Radio Access Network (O-RAN) that includes a fronthaul interface over which an O-RAN Distributed Unit (O-DU) and an O-RAN Radio Unit (O-RU) communicate with one another and exchange O-RAN standard defined user-plane (U-plane) packets and control-place (C-Plane) packets. The fronthaul interface carries control and management information via management-plane (M-Plane) message exchange, and timing synchronization is achieved in accordance with synchronization-plane (S-Plane) procedures, and the O-RAN accommodates communications via 2G and 3G based mobile networks.

Abstract: Systems and methods for for efficient information exchange between UE and gNB to enable AI/ML based CSI Compression for CSI feedback enhancement.

Abstract: System and methods for implementations of sub-band correlation computation among all scheduled users to efficiently pair users across any group of Physical Resource Blocks.

Abstract: An method for expediting Virtual Local Area Network (VLAN) scanning for Dynamic Host Configuration Protocol (DHCP) server includes: transmitting, by a software tool, VLAN ethernet trunk frames including VLAN Identifier (ID) 1 to VLAN ID 4095, to an ethernet interface of a radio unit (RU), the ethernet interface being connected via an ethernet switch to a distributed unit (DU), wherein the DHCP server is located at the DU; selectively forwarding, by the ethernet switch to the DU, only a VLAN ethernet trunk frame having VLAN ID value X predefined by operator of the O-RAN system; selectively responding, by the DU, in response to receiving the VLAN ethernet trunk frame having VLAN ID value X, by sending a DHCP response message to the RU; and identifying, by the RU from the DHCP response message, the VLAN ID value X corresponding to the DHCP server.

Abstract: A method of uniquely identifying a user equipment (UE) connected to a radio access network (RAN) includes: providing a radio access network intelligent controller (RIC) component associated with the RAN; configuring, by a packet data convergence protocol (PDCP) layer, a default data radio bearer (DRB) for the UE to maintain Internet Protocol (I) Protocol Data Unit (PDU) connectivity with the RAN; and using, by the RIC, one of NG uplink (UL) user plane (UP) Transport Layer Information or S1 UL UP Transport Layer Information of the default DRB for uniquely identifying the UE for the entire time the UE is connected to the RAN. The unique identification for the UE is retained across at least one of i) multiple connectivity sessions for the UE, ii) multiple mobility sessions for the UE, and iii) multiple context sessions for the UE.

Abstract: There is provided an Open Radio Access Network (O-RAN) that includes a fronthaul interface over which an O-RAN Distributed Unit (O-DU) and an O-RAN Radio Unit (O-RU) communicate with one another and exchange O-RAN standard defined user-plane (U-plane) packets and control-place (C-Plane) packets. The fronthaul interface carries control and management information via management-plane (M-Plane) message exchange, and timing synchronization is achieved in accordance with synchronization-plane (S-Plane) procedures, and the O-RAN accommodates communications via 2G and 3G based mobile networks.

Abstract: A method for reducing peak-to-average power ratio (PAPR) of a multi-layer precoder matrix (PM)-combined demodulation reference signal (DMRS) symbol includes one of: a) performing, at a distributed unit (DU), a modified orthogonal cover code (M-OCC) method to reduce the PAPR of the multi-layer PM-combined DMRS, wherein the M-OCC method comprises; i) multiplying a PM with a specified multiplication factor in frequency domain to obtain a modified PM, and ii) subsequently multiplying at least one of multiple downlink (DL) layers with the modified PM; or alternatively b) performing, at a distributed unit (DU), a modified cyclic delay diversity (M-CDD) method to reduce the PAPR of the multi-layer PM-combined DMRS, wherein the M-CCD method comprises; i) multiplying at least one of multiple frequency-domain downlink (DL) layers with a specified linear phase shift to obtain phase-shifted DL layers, and ii) subsequently multiplying the phase-shifted DL layers with the PM.

Abstract: A method for stale user context detection and removal is implemented at one of Open Radio Access Network (O-RAN) Centralized Unit (gNB-CU) or Distributed Unit (gNB-DU). In a first variant which utilizes the gNB-CU, the gNB runs a configurable periodic timer for initiating the stale UE detection procedure, i.e., the gNB configures, for every UE context stored in its database, a special Event A1 with the low a1-Threshold=?120 dBm, reportInterval=512 ms, and reportAmount=2. In a second variant which utilizes the gNB-CU, stale UE detection mechanism can be based on a periodic Event A1 configured during initial User admission procedure, i.e., the gNB configures a special Event A1 with the low a1-Threshold=?120 dBm, reportInterval=1 minute, and reportAmount=infinity. In a further variant, stale UE contexts can be identified at the gNB-DU based on periodic Channel State Information (CSI) reports.