Abstract: Systems and methods for dynamic base station functional split configuration management are provided. In one embodiment, a system for base station functional split management for uplink fronthaul traffic comprises: a baseband controller coupled to a plurality of radio units via a fronthaul network, wherein the plurality of radio units comprise a signal zone from which uplink signals are combined by the base station: a split controller configured to dynamically select and control a functional split of a respective uplink receive chain between the baseband controller and each of the plurality of radio units: wherein the functional split defines a demarcation point on the receive chain prior to which processing operations are executed by a radio unit and after which processing operations are executed by the baseband controller: wherein the split controller selects between a plurality of functional split options to dynamically control the functional split and the demarcation point.

Abstract: Techniques are provided for diminishing latency in a DAS fronthaul network configured to convey time-domain transport data, e.g., time-domain digital transport data or time-domain digital data. Other techniques are provided for obtaining higher DAS fronthaul efficiency.

Abstract: Techniques are provided for diminishing latency in a DAS fronthaul network configured to convey time-domain transport data, e.g., time-domain digital transport data or time-domain digital data. Other techniques are provided for obtaining higher DAS fronthaul efficiency.

Abstract: An open radio access network implementing a shared cell includes a distributed unit and radio units communicatively coupled to the distributed unit. Each radio unit includes circuitry for exchanging radio frequency signals with user equipment. Radio units include hybrid mode radio unit. first downstream radio unit, and second downstream radio unit. Hybrid mode radio unit is coupled to distributed unit. First downstream radio unit is coupled to distributed unit via hybrid mode radio unit. The second downstream radio unit is coupled to distributed unit via hybrid mode radio unit. Hybrid mode radio unit is configured to: (1) receive downlink control-plane and user-plane messages and uplink control-plane messages from distributed unit: (2) transmit downlink radio frequency signals from antenna(s), wherein downlink radio frequency signals are based on downlink control-plane and user-plane messages: and (3) copy and forward downlink control-plane. user-plane messages.

Abstract: A communication system that uses dual base station frame boundaries is provided. A base station is in communication with a core network of at least one service provider and user equipment. The base station includes a circuitry that is configured to set a UL physical uplink shared channel (PUSCH) time frame boundary in alignment with a downlink (DL) PDSCH time frame boundary, process PUSCH communication signals in the PUSCH using the UL PUSCH time frame boundary, set an UL random access channel (RACH) time frame boundary at a select delay from an associated RACH time frame boundary within a UL PUSCH time frame, process RACH communication signals using the delayed UL RACH time frame boundary, and provide a timing advance command to a UE that communicated a UL RACH communication signal that accounts for a round trip latency in a fronthaul network connecting the base station and radio units.

Abstract: One embodiment is directed to a system to provide wireless service comprising a base band unit and a plurality of antennas communicatively coupled to the base band unit. The system is configured for frequency reuse implemented via the plurality of antennas in order to transmit to subsets of the UEs. The UEs included in each subset are transmitted respectively different data using the same resource elements. The system is configured to collect base station data including Channel Quality Information (CQI) data, Sounding Reference Signal (SRS) data, and hybrid automatic repeat request (HARQ) acknowledgement/negative acknowledgement (ACK/NACK) data for the plurality of UEs. The system is configured to use the base station data to determine candidate UEs for transmission to using frequency reuse and to determine modulation and coding schemes (MCSs) for the UEs transmitted to using frequency reuse.

Abstract: Techniques are described for avoiding contention between synchronization packets (for example, Institute of Electrical and Electronics Engineers (IEEE) 1588 Precision Time Protocol (PTP) synchronization packets) and in-phase and quadrature (IQ) packets communicated over a fronthaul network used in a radio access network (for example, a Fifth Generation (5G) radio access network).

Abstract: Various techniques for reducing fronthaul bandwidth usage or contention in radio access networks are described. A base station is configured so that each of RUs is configured to: receive, at that RU, an SRS transmission from a UE; perform, by the RU, at least some of a high physical layer (PHY) baseband processing for the received SRS transmission; and transmit fronthaul data for the received SRS transmission to the distributed unit over the fronthaul network, wherein the fronthaul data comprises a payload including data generated in connection with performing at least some of the high PHY based processing for the received SRS transmission.

Abstract: One embodiment is directed to a communication system comprising a plurality baseband units; and a plurality of remote units communicatively coupled to the baseband units using a switched Ethernet network. Each baseband unit is associated with a respective subset of the remote units. Each baseband unit is configured to communicate baseband data with the respective subset of the remote units associated with that baseband unit over the switched Ethernet network. Each baseband unit and remote unit is configured to perform at least some baseband processing associated with serving the respective cell. The communication system is configured so that one of the baseband units is a master baseband unit and is configured to transmit time stamp messages with the remote units associated with the master baseband unit and with the remote units associated with the other baseband units of the plurality of baseband units.

Abstract: Systems and methods for geolocation of user equipment are provided. In one example, a system includes BBU(s) and radio units communicatively coupled to the BBU(s). Each radio unit is configured to receive uplink signals from a user equipment. The system further includes antennas communicatively coupled to the radio units. Each respective radio unit is communicatively coupled to a respective subset of the antennas. The BBU(s), the radio units, and the antennas are configured to implement a base station for wirelessly communicating with user equipment. One or more components of the system are configured to determine, for each respective radio unit, a respective propagation delay for the uplink signals from the user equipment for the respective radio unit. The at least one BBU entity is configured to jointly process the respective propagation delays for each respective radio unit to determine an estimated position of the user equipment.

Abstract: Orthogonal DMRS ports with resource block reuse in a single cell is provided. ABS comprises: a BBE and RUs. The BS transmits user data to each of a plurality of UEs on a PDSCH using a PRB allocation for the cell. The PRB and cell are the same for all UEs. The PRB comprises DMRS symbols. The BS transmits user data to each UE on the PDSCH using a respective non-intersecting subset of the RUs. No RU transmits user data on the PDSCH using the PRB to more than one UE. The BBE: determines non-intersecting sets of DMRS ports; assigns one set to each UE; and causes the BS to transmit UE-specific DMRS to UE on the DMRS ports in the set assigned to that UE using only a respective non-intersecting subset of RUs used for transmitting user data to that UE on the PDSCH using the PRB.

Abstract: Systems and methods for dynamic base station functional split configuration management are provided. In one embodiment, a system for base station functional split management for uplink fronthaul traffic comprises: a baseband controller coupled to a plurality of radio units via a fronthaul network, wherein the plurality of radio units comprise a signal zone from which uplink signals are combined by the base station: a split controller configured to dynamically select and control a functional split of a respective uplink receive chain between the baseband controller and each of the plurality of radio units: wherein the functional split defines a demarcation point on the receive chain prior to which processing operations are executed by a radio unit and after which processing operations are executed by the baseband controller: wherein the split controller selects between a plurality of functional split options to dynamically control the functional split and the demarcation point.

Abstract: Embodiment are directed to systems and methods for use with a central radio access network (C-RAN) comprising a plurality of controllers and a plurality of radio points. Each of the controllers is configured to determine if that controller should serve as a timing master for the controllers and the radio points and, if that controller should serve as the timing master, synchronize the local clock of that controller with a master clock source over a backhaul network and transmit synchronization messages from that controller over a fronthaul network for reception by the other controllers and the radio points and for use by the other controllers and the radio points in synchronizing the local clocks thereof with the local clock of that controller. Other embodiments are disclosed.

Abstract: One embodiment is directed to a communication system comprising a remote unit comprising a remote unit local clock and a controller communicatively coupled to the remote unit using a switched Ethernet network. The remote unit is configured to synchronize the remote unit local clock to a reference timing source using timing messages communicated over the switched Ethernet network with the remote unit. The communication system is configured to transmit the timing messages and baseband data so as to reduce a level of contention encountered by the timing messages in connection with being communicated over the switched Ethernet network.

Abstract: Systems and methods for flexible antenna configurations and beamforming are provided. In one example, a system includes: at least one controller configured to implement at least some functions for one or more layers of a wireless interface used to communicate with UEs; remote unit(s) communicatively coupled to the at least one controller; and antenna elements communicatively coupled to the remote unit(s), each respective antenna element oriented in a respective direction different than other antenna elements. The at least one controller is configured to: determine a location of a UE in a cell of the system and/or channels between the antenna elements and the UE; select antenna element(s) for use in transmitting downlink signals to the UE based on the location of the UE and/or the channels between the antenna elements and the UE; and transmit downlink signals to the UE via the selected antenna element(s) in a first time period.

Abstract: Systems and methods for consolidated two-level beam management for a base station that includes BBU(s) and a RU communicatively coupled to the BBU(s) are provided. In one example, a method includes receiving signal measurements for coarse beams from a UE; establishing a coarse beam association for the UE with a first coarse beam based on the signal measurements for the coarse beams from the UE; configuring the UE to measure reference signals associated with fine beams associated with the first coarse beam; receiving reference signal measurements for the fine beams from the UE; establishing a fine beam association for the UE with a first fine beam based on the reference signal measurements for the fine beams from the UE; transmitting synchronization signals to the UE using the first coarse beam; and transmitting data signals to UE using the first fine beam.

Abstract: Systems and methods for preventing power imbalance across antennas for DMRS transmissions are provided herein. In one example, a method includes receiving an indication of a requested precoder from a user equipment, wherein the requested precoder is included in a codebook defined in a 3GPP specification. The method further includes applying a modified precoder corresponding to the requested precoder. The modified precoder is included in a modified codebook that is a modified version of the codebook defined in the 3GPP specification. The method further includes transmitting a double-symbol demodulation reference signal with the modified precoder to the user equipment.

Abstract: One embodiment is directed to a system comprising a distributed unit comprising a plurality of processing units (PUs) and a plurality of radio units (RUs). Each PU is configured to: for each time slot included in a first subset of the time slots, independently perform scheduling for at least one shared channel for only those UEs for which the respective protection zone (PZ) span only RU groups (RUGs) included in a first one of a respective pair of RUG Groups associated with that PU, and, for each time slot included in a second subset of the time slots, independently perform scheduling for the at least one shared channel for only those UEs for which the respective PZs span only the RUGs included in a second one of the respective pair of RUG Groups associated with that PU. Other embodiments are directed to scheduling support channel resources.

Abstract: An example communication system includes remote units to exchange radio frequency (RF) signals with mobile devices, RF signals comprising information destined for, or originating from, a mobile device, the remote units performing at least some physical layer processing for an air interface used by the remote units to communicate with the mobile device. The communication system also includes two or more controllers comprising real-time schedulers for assigning airlink resources to the mobile device for the information. The communication system also includes a coordination function coupled to the two or more controllers to coordinate assignments made by the real-time schedulers in the two or more controllers.

Abstract: An example communication system includes remote units to exchange radio frequency (RF) signals with mobile devices, RF signals comprising information destined for, or originating from, a mobile device, the remote units performing at least some physical layer processing for an air interface used by the remote units to communicate with the mobile device. The communication system also includes two or more controllers comprising real-time schedulers for assigning airlink resources to the mobile device for the information. The communication system also includes a coordination function coupled to the two or more controllers to coordinate assignments made by the real-time schedulers in the two or more controllers.