206 results about "Fronthaul" patented technology

An example communication system includes a distributed unit of a fronthaul communication system architecture, wherein the distributed unit is in communication with a core network of the communication system, a radio unit of the fronthaul communication system architecture, wherein the radio unit is electrically coupled with at least one cellular antenna, and the radio unit is configured to transmit and receive wireless cellular signals, and a wireless communication link between the distributed unit and the radio unit. The wireless communication link includes a first system-on-chip (SoC) device electrically coupled with the radio unit, and a second SoC device electrically coupled with the distributed unit, wherein the first SoC device and the second SoC device are configured to wirelessly transmit communication signals between the radio unit and the distributed unit at a frequency of at least sixty Gigahertz.

One embodiment is a system having a master unit coupled to first and second base station sources having different OTA frame boundary timings, where an access point coupled to the master unit receives fronthaul data for the first and second base station sources, determines a common OTA frame boundary timing, and aligns OTA symbols and frames for the first and second base station sources to the common OTA frame boundary timing. Another embodiment is a system having a base station synchronized with a timing grandmaster and a master unit, synchronized with the timing grandmaster, coupled to the base station. The master unit determines the time of day using the synchronization, identifies a system frame and subframe number using the time of day, acquires configuration information for communications with the base station using the system frame and subframe number, and identifies frame boundary timing using the configuration information.

Systems and methods are described for monitoring for congestion conditions within a packet fronthaul underlay network of a radio access network, RAN. For example, congestion conditions are monitored within the packet fronthaul underlay network, the packet fronthaul underlay network comprising a plurality of Layer 2, L2, switches to communicate enhanced Common Public Radio Interface, eCPRI, packets embedded in L2 frames. One or more congestion bits are updated in a reserved header field of an eCPRI packet responsive to detecting the congestion conditions to provide a notification of the congestion condition to one or more other L2 switches through which the eCPRI packet is processed and to a baseband unit (BBU) or distributed unit (DU) terminating the eCPRI interface. The BBU or DU maps the congestion conditions to network connections external to the packet fronthaul underlay network responsive to the notification.

The invention discloses an intelligent reflector assisted user arrival angle estimation method in a multi-carrier ISAC system. In the method, a plurality of users send pilot signals, and each IRS reflects the user signals to a remote radio access unit (RRH). The RRH uploads the received signal to a centralized baseband processing unit pool (BBU) through a forward link; the BBU performs joint processing on the received signals on the plurality of RRHs, and the observation dimension is increased by constructing the frequency domain snapshot observation matrix of the pilot signals on the plurality of subcarriers, so that the estimation precision of the arrival angle from the user to the IRS path is improved. According to the method, frequency domain snapshot information brought by pilot frequency subcarriers is fully utilized, and the angle estimation resolution and robustness are improved. By adopting the scheme of the invention, high-precision user positioning can be realized in a complex environment.

According to embodiments, a method performed by a distributed unit (DU) may involve: transmitting, to a radio unit (RU), a first control plane message including section extension information for indicating the number of one or more signal-to-interference-plus-noise-ratio (SINR) values for each physical resource block (PRB) corresponding to a frequency resolution of an SINR report by the RU; and receiving, from the RU, a second control plane message including section type information for indicating the one or more SINR values according to the frequency resolution and the number of the one or more SINR values for each PRB.

A first network entity of a communications network can generate compressed beamforming weights (“BFWs”) based on a transformation configuration. The transformation configuration can be based on one or more parameters of an antenna array associated with a second network entity of the communications network. The one or more parameters can include a parameter that is separate from a total number of antenna ports in the antenna array. The first network entity can further transmit an indication of the compressed BFWs to the second network entity via a fronthaul between the first network entity and the second network entity.

The present disclosure provides a fault root cause location method and apparatus for a fronthaul link. The method comprises: acquiring a plurality of groups of target data corresponding to a plurality of groups of links in a fronthaul link, wherein each group of links corresponds to one group of target data; determining the link state of each link in each group of links according to the plurality of groups of target data; and performing fault root cause location on an abnormal link in an abnormal link state.

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method and apparatus for bit compression of uplink fronthaul data in a wireless communication system are provided. In one embodiment, a method of a UE includes identifying uplink forward data to reduce data loading on an uplink forward link, where the uplink forward link is between an RU and a DU; processing the uplink fronthaul data to obtain a set of representative values for a compression operation; selecting at least one coding parameter for the compression operation based on the set of representative values; and transmitting the uplink fronthaul data compressed based on the compression operation to the DU.

A method (400) is disclosed. The method includes establishing (402), at an Open Radio Access Network (O-RAN)-Radio Unit Controller (O-RU Controller), a session with an O-RU. In response to establishment of the session, the method includes configuring (404), at the O-RU controller one or more Media Access Control security (MACsec) configuration parameters for the O-RU. The one or more MACsec configuration parameters comprises at least a pre-shared key. The method also includes generating (406), at the O-RU controller, using a random number generator, at least one of a Secure Authentication Key (SAK) and a Key Encryption Key (KEK) based on the pre-shared key. Moreover, the method includes transmitting (408), from the O-RU controller to the O-RU, at least one of the one or more MACsec configuration parameters and the at least one of the SAK and the KEK.

Systems, apparatuses, and methods for implementing a real-time Open Radio Access Network (O-RAN) fronthaul analyzer and graphical user interface (FHA / GUI) are provided. In one example, a method describes receiving an O-RAN fronthaul (OFH) packet traffic flow; parsing packet headers of the OFH packet traffic flow; identifying and tracking active flows in the OFH packet traffic flow using the parsing; and presenting a visual representation of the active flows using the tracking of active flows. In some examples, the real-time O-RAN FHA / GUI may be used for testing an OFH link for compliance with the O-RAN standards.

Techniques for supporting non-terrestrial fronthaul network architectures are provided. In one example, a wireless network includes: a satellite comprising a radio unit; a satellite gateway in communication with the satellite; and a distributed unit located on Earth and in communication with the satellite gateway. Using ephemeris data for the satellite and the location of the gateway, maximum and minimum distances between the gateway and the satellite are determined for a time period when the satellite will be in line-of-sight communication with the satellite gateway. Based on the maximum and minimum distances, maximum and minimum propagation times for signals exchanged between the satellite and the gateway during the time period are determined. Using the maximum and minim propagation times, the distributed unit coordinates uplink and downlink transmission windows with the radio unit.

The invention discloses an anti-interference unmanned aerial vehicle cellular edge removal computing resource allocation method in an air-space-ground integrated network, which comprises the following steps of: firstly, constructing an air-space-ground integrated network architecture comprising a low-orbit satellite, an unmanned aerial vehicle cluster and a ground user, and establishing satellite interference space distribution mapping based on a satellite orbit and an interference measurement result; and then adopting a user-centered dynamic clustering strategy, combining with a large-scale fading coefficient and interference intensity, adaptively selecting a cooperation cluster scale and member composition, and forming an unmanned aerial vehicle cooperation cluster. Then establishing an uplink communication model of an explicitly introduced satellite direct-connected user co-frequency interference term, and on the basis, constructing a three-section end-to-end time delay model comprising wireless transmission time delay, parallel computing time delay and forward pass and backhaul time delay related to a cooperative cluster scale and a quantization bit number; according to the method, the cooperative cluster scale and the quantization bit number are used as time delay optimization variables together, controllable optimization of end-to-end time delay is achieved, the propulsion energy consumption of the unmanned aerial vehicle is considered, and therefore the unloading efficiency and the overall energy efficiency of the cellular edge removal computing system are improved.

Disclosed are techniques for wireless communication. In an aspect, a base station may determine a transmit power to be used by a downstream node or an amplification gain to be used by the downstream node when relaying or repeating messages to a target node. The base station may transmit, to the downstream node, a message intended for the target node, the message having an indicated transmit power, wherein the message intended for the target node is transmitted by the base station using an actual transmit power. In some aspects, the indicated transmit power is the transmit power to be used by the downstream node, so that when the message intended for the target node is repeated by the downstream node, the indicated transmit power of the repeated message matches the actual transmit power of the repeated message.

Techniques for supporting non-terrestrial fronthaul network architectures are provided. In one example, a wireless network system includes: a satellite comprising a radio unit; a distributed unit located on Earth that manages the radio unit; and a satellite gateway in communication with the distributed unit and the satellite. The satellite gateway is configured to: receive ephemeris data for the satellite; initiate a sequence of clock synchronization transmissions between the radio unit and the satellite gateway; and determine, using the ephemeris data and a location of the satellite gateway, a first propagation time for a first clock synchronization transmission and a second propagation time for a second clock synchronization transmission. Based on the propagation times, the satellite gateway generates and transmits a clock synchronization correction factor that the radio unit will use to determine an offset between clock signals of the radio unit and the distributed unit.

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). According to various embodiments, a method performed by a Distributed Unit (DU) may include: generating configuration information for packets used in uplink data transmission of a plurality of Radio Units (RUs) providing a shared cell, and transmitting the configuration information for packets to an RU among the plurality of RUs through a fronthaul interface. The configuration information for packets may include information for indicating the number of per-packet Physical Resource Blocks (PRBs) for the uplink packets.

Apparatus and methods for radio unit (RU) joint phase-time array (JPTA) capability for fronthaul communications. A method performed by a radio unit (RU) includes transmitting, to a distributed unit (DU) via a management-plane (M-plane) of a fronthaul interface, information indicating support for joint phase-time array (JPTA) beamforming, transmitting, to the DU, beamforming capability information associated with a frontend architecture of a transceiver of the RU, and receiving, from the DU, a JPTA configuration based on the beamforming capability information. The method further includes identifying a JPTA beam to apply based on the JPTA configuration and transmitting, to one or more user equipment (UEs), the JPTA beam.

Techniques for supporting non-terrestrial fronthaul network architectures are provided. In one example, a wireless network includes: a satellite comprising a radio unit; a satellite gateway in communication with the satellite; and a distributed unit located on Earth and in communication with the satellite gateway. Using ephemeris data for the satellite and the location of the gateway, maximum and minimum distances between the gateway and the satellite are determined for a time period when the satellite will be in line-of-sight communication with the satellite gateway. Based on the maximum and minimum distances, maximum and minimum propagation times for signals exchanged between the satellite and the gateway during the time period are determined. Using the maximum and minim propagation times, the distributed unit coordinates uplink and downlink transmission windows with the radio unit.

Aspects of the subject disclosure may include, for example, determining a topology of a network, wherein the network includes a plurality of network elements (NEs) and at least one optical network-based fronthaul, at least one optical network-based midhaul, or combination thereof, for one or more routes associated with one or more of the plurality of NEs identified based on the topology, applying one or more sets of parameters for that route, obtaining data relating to the network based on the applying the one or more sets of parameters, training one or more AI models using the data, resulting in one or more trained AI models, and utilizing the one or more trained AI models to generate one or more predictions regarding spectral efficiency relating to the at least one optical network based fronthaul, the at least one optical network-based midhaul, or the combination thereof. Other embodiments are disclosed.

A redundant system and a redundancy method of a fronthaul network are provided. The redundant system includes a first fronthaul multiplexer. The first fronthaul multiplexer includes a first group port, a second group port, a first cascade port, a first protect port, a first active port, and a first uplink circuit. The first uplink circuit includes a first summation circuit and a second summation circuit. A plurality of input terminals of the first summation circuit are coupled to the first group port and the second group port respectively, and an output terminal of the first summation circuit is coupled to the first protect port. A plurality of input terminals of the second summation circuit are coupled to the first cascade port and the output terminal of the first summation circuit respectively, and an output terminal of the second summation circuit is coupled to the first active port.

The invention provides a low-altitude cellular-free network signal detection method under wireless forward pass constraint, which belongs to the field of wireless communication and digital signal processing, and comprises the following steps: establishing a signal transmission model based on a low-altitude cellular-free network architecture; in the period, each air AP obtains a local signal processing result; transmitting signals of the air APs are distributed on B subcarriers so as to send local signal processing results to the central processing unit in real time; the central processing unit performs combination detection on the ground user signals to obtain a final ground user signal detection result; and after the period is ended, each air AP sends the channel statistical information of the period to the central processing unit, and the central processing unit optimizes the local processing matrix of each air AP and sends the optimized local processing matrix to each air AP. According to the method, the uplink rate of the ground user can be effectively improved, and meanwhile, the problems of channel fading, multiple access and network expandability of a wireless forward link are solved.

The disclosure relates to a pre-5th-Generation (5G) or 5G communication system to provide for supporting higher data rates beyond a 4th-Generation (4G) communication system. A method performed by a distributed unit (DU) in a wireless communication system is provided. The method includes transmitting one or more data streams of a message of a control plane or a user plane, which correspond to one or more layers, to a radio unit (RU) through a first fronthaul port, and transmitting a data stream corresponding to an access layer, which is the first layer used for connection of a cell among the one or more layers, to the RU through a second fronthaul port configured between the DU and the RU.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a radio unit (RU) may receive, as at least part of a first fronthaul control plane (Cplane) message, a sounding reference signal (SRS) section extension that indicates transmission configuration information associated with two or more SRS ports and one or more transmissions that share one or more air interface resources that span multiple symbols and one or more frequency partitions. The RU may transmit, as at least part of a second fronthaul C-plane message, one or more channel estimation measurement metrics that are based at least in part on the transmission configuration information. Numerous other aspects are described.

A method for compressing Sounding Reference Signal (SRS) channel information in massive MIMO systems is disclosed. When SRS channel estimation is performed in a Radio Unit (RU), the resulting channel estimates create significant fronthaul bandwidth demands. The method transforms SRS channel estimates from antenna space to domains with superior energy compacting properties, enabling transmission of only a subset of channel values while preserving information quality. The method includes beam space compression using mathematical transforms such as DFT, SVD, or EVD to convert channel estimates to beam space, followed by selection of the most significant beams. Alternative embodiments include tap domain compression using DCT or DFT, and delay-Doppler domain compression. The methods support static beam space compression using predefined beam bases and dynamic compression employing adaptive beam bases. O-RAN C-Plane implementations extend Section Type 6 to support the compression methods. The methods significantly reduce fronthaul bandwidth requirements while maintaining channel estimation accuracy, enabling improved system capacity in massive MIMO deployments.

This invention discloses a simple, multifunctional, integrated 5G analog fronthaul in-band full-duplex communication method for remote units (RUs). This method primarily relates to the fields of optical communication technology and microwave technology. The system structure of the method, as shown in Figure 1 of the specification, includes a laser, downlink vector signal, electrical local oscillator signal, downlink interference signal, target signal, reference signal, 90° electrical coupler, dual-polarization quadrature phase-shift keying modulator, phase modulator, single-mode fiber, optical coupler, polarization beamsplitter, polarization beam combiner, polarization controller, polarizer, and photodetector. The remote unit (RU) uses a single phase (PM) modulator to achieve self-interference cancellation (SIC) combined with anti-fiber dispersion transmission and down-conversion, eliminating the need for bias control and additional local oscillator (LO) branches, resulting in a simple structure. At the central office (CO), the carried downlink signal and local oscillator signal are single-sideband modulated to achieve anti-fiber dispersion transmission. The RU uses wavelength reuse technology to perform PM cascaded down-conversion on the signal received from the uplink, and the SIC is moved from the RU to the CO to simplify the RU. The entire link has no optical filter and is reconfigurable.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a radio unit (RU) may receive, as at least part of a first fronthaul control plane (C-plane) message, a sounding reference signal (SRS) section extension that indicates transmission configuration information associated with two or more SRS ports and one or more transmissions that share one or more air interface resources that span multiple symbols and one or more frequency partitions. The RU may transmit, as at least part of a second fronthaul C-plane message, one or more channel estimation measurement metrics that are based at least in part on the transmission configuration information. Numerous other aspects are described.

A radio access network (RAN) system comprises a plurality of capsules that operate in parallel to cooperatively perform RAN stack operations, each capsule utilizing a processor and a memory configured to perform a corresponding component of the RAN stack operations, wherein the plurality of capsules are configured to support slicing functionality to separately process different types of signals; wherein the different types of signals correspond to different data flows, wherein each data flow of the different data flows serves as a pipe to transfer user data from one or more applications in accordance with a corresponding quality of service requirement and wherein the RAN stack operations result in: communicating backhaul communications with a core communication network; communicating fronthaul communications with a plurality of radio units configured to engage in wireless communications with a plurality of user equipment (UEs) via a radio channel of a radio network; converting, in accordance with a communication standard, received fronthaul communications from the plurality of radio units into backhaul communications transmitted to the core communications network; and converting, in accordance with the communication standard, received backhaul communications from the core communications network into fronthaul communications transmitted to the plurality of radio units.

This communication control device controls a communication connection between one or a plurality of radio units (RUs) and one or a plurality of distributed units (DUs) on the basis of a switch state of a fronthaul switch between the one or plurality of RUs and the one or plurality of DUs in a wireless access network.

This disclosure provides methods, components, devices and systems for coordinated scheduling-based protocols for multi-hop traffic flows in a controller-based network. Some aspects more specifically relate to a coordinated scheduling of time slots for multi-hop traffic flows across both fronthaul and backhaul links in controller-based networks. In some examples, an access point (AP) within the network may provide information indicative of one or more established schedules of time slots to a network controller and the network controller may use such information for conflict resolution between different schedules of time slots. In accordance with the propagation of schedules of time slots to the network controller, the network controller may obtain a complete view of traffic patterns within the network and leverage such a complete view for the conflict resolution. Additionally, or alternatively, an AP may rely on a configuration by the network controller of one or more coordinated schedules of time slots.

High capacity, long range wireless communication link was ever needed. With the technology advancement and the requirement for higher data rates and limited latency requirements the existing solutions are providing partial and very limited solution. We propose new approach that provides the need in an efficient way and with the required properties to allow easy use and tuning as well as great robustness with link redundancy.

A method is provided for enabling Narrowband Internet of Things (NBIOT) transport over fronthaul (FH) interface between distributed unit (DU) and radio unit (RU) for at least one of 4G Long Term Evolution (LTE) network and 5G New Radio (NR) network, which method includes: receiving, by an RU capable of at least one of NBIOT inband mode and NBIOT guardband mode, i) at least one of LTE and NR in-phase and quadrature (IQ) samples associated with a first endpoint, and ii) NBIOT IQ samples associated with a second endpoint; and configuring the RU functionality to be able to combine, in at least one of frequency domain and time domain, i) the at least one of LTE and NR in-phase and quadrature (IQ) samples associated with a first endpoint, and ii) the NBIOT IQ samples associated with a second endpoint.