304 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.

Methods and apparatuses for handling an acknowledgement of C-plane message in a wireless communication system. A method of a transmitter device comprises: generating a section extension for an ACK / NACK request including an ackNackReqId field and an extLen field, wherein the ackNackReqId field indicates the ACK / NACK request ID of a section description and the extLen field indicates a size of the section extension; transmitting, to a receiver device, the C-plane message including the section extension for the ACK / NACK request; and receiving, from the receiver device, an ACK message corresponding to the C-plane message.

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.

Disclosed are devices, methods, apparatuses, and computer readable media for fronthaul. An example apparatus for a scheduler may include at least one processor and at least one memory. The at least one memory may store instructions that, when executed by the at least one processor, may cause the apparatus at least to: monitor a feedback notifying a status of congestion in fronthaul; and perform at least one of the following: adjusting link adaptation, or adjusting radio resource allocations with a radio resource limit which restricts an amount of radio resources available per a time interval for a given cell or a group of cells.

A method for wireless communication performed by a distributed unit (DU) includes receiving, from a radio unit (RU), a management-plane message including information about a control-plane message supported by the RU, generating, based on the management-plane message, a first control-plane message including a field indicating a first user equipment identifier (UE ID) and a first section extension field, and transmitting, to the RU through a fronthaul interface, the first control-plane message during a time period longer than a slot. The first section extension field includes a parameter indicating a number of UE IDs of a user associated with the first UE ID.

A network node in a communications network can be configured to provide a radio unit, RU The network node can determine (1240) a symbol pattern that the RU is capable of using to transmit a signal-to-interference-plus-noise, SINR, report to a distributed unit, DU. The network node can transmit (1250) an indication to the DU of the symbol pattern that the RU is capable of using to transmit the SINR report to the DU. The network node can transmit (1260) the SINR report to the DU using the symbol pattern.

The invention relates to a performance monitoring method of a forward transmission network, an optical module, equipment and a storage medium. The method comprises the following steps: acquiring an optical signal which is sent from a far-end radio frequency unit and is transmitted to a receiving unit of a performance monitoring optical module, and converting the optical signal into an electric signal; performing eye pattern analysis on the electric signal to generate an eye pattern distribution histogram; the eye pattern distribution histogram is used for representing distribution conditions of different signal amplitudes in different intervals; determining a multipath interference deformation factor according to the deformation condition of the eye pattern distribution histogram of the electric signal compared with the eye pattern distribution histogram before signal transmission; and determining a signal-to-noise ratio estimation value according to the multipath interference deformation factor, and determining a performance monitoring result of the forward transmission network according to the signal-to-noise ratio estimation value. By adopting the method, the link quality of the forward network can be accurately evaluated.

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.

A method performed by means of a distributed unit (DU) is provided. The method includes after a control plane (C-plane) message including control information is transmitted, and generating a user plane (U-plane) message including modulation compression information and modulated and compressed data configured as a section, transmitting, to a radio unit (RU), the U-plane message through a fronthaul interface, wherein the modulation compression information includes a flag for indicating whether constellation is moved, and scale information for indicating a scaler value.

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.

A communication device constitutes a management node that manages at least one of a first base station and a second base station provided on fronthaul. The communication device includes an acquisition unit that acquires a delay profile of the second base station, a control unit that determines a window parameter used to specify at least one of a Reception window and a Transmission window used in the first base station based on the delay profile of the second base station and a delay parameter defined by the fronthaul, and a notification unit that notifies the first base station of the window parameter.

Techniques for reducing downlink data and / or uplink data transported in a distributed antenna system (DAS) are provided. Time domain data is transformed into a frequency domain. In the DAS, on a PRB-by-PRB basis, whether each of frequency-domain downlink digital data and frequency-domain uplink digital data comprise a meaningful signal is determined. Each of the frequency-domain downlink digital data and the frequency-domain uplink digital data comprising valid PRBs are subsequently transported in the DAS. Other techniques are disclosed for utilizing O-RAN user plane messages and corresponding O-RAN control plane messages in fronthaul transport of a distributed antenna system (DAS) to reduce bandwidth consumption and simplify management of the DAS. Bandwidth consumption in the fronthaul transport of the DAS is diminished by only transporting IQ data having a valid signal.

A system is disclosed, comprising: a solar panel; a battery; an electric power supply source; a wireless fronthaul access point coupled to a radio mast and in communication with a remote baseband unit, the wireless fronthaul access point further comprising a first millimeter wave wireless interface; a self-organizing network module in communication with a coordinating server; and an antenna-integrated radio for providing access to user equipments (UEs), mounted within line of sight on the radio mast with the wireless fronthaul access point, the antenna-integrated radio further comprising: a second millimeter wave wireless interface configured to receive the digital I and Q signaling information from the remote baseband unit wirelessly via the wireless fronthaul access point, wherein the wireless fronthaul access point thereby wirelessly couples the remote baseband unit and the antenna-integrated radio, and the battery performing grid-backfeeding using the battery at the antenna site.

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 device can include communication circuitry to communicate with radio units (RUs) over a fronthaul (FH) interface. The device can include a processor coupled to the communication circuitry to receive, over the communication interface, an indication of a number of multiple-input multiple-output (MIMO) layers to be scheduled, and information identifying the one or more RUs. The processor can assign a number of streams to the one or more RUs based on the number of MIMO layers. The processor can provide the assigning to the number of RUs over the FH interface.

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.

A system is provided for at least one of testing and validating at least one Open Radio Access Network (O-RAN) remote radio head (RRH) present for installation at an installation site having no network connectivity to the RRH available, which system includes a network emulator configured to at least one of test and validate at least one of a device parameter and a functional parameter of the at least one RRH when selectively coupled to the at least one RRH. The network emulator is configured to be selectively coupled to a user equipment (UE) configured for displaying the at least one of the device parameter and the functional parameter of at least one RRH, and wherein the network emulator is one of 1) directly coupled to the at least one RRH, or 2) connected to the at least one RRH via a cell site router (CSR).

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.

A test device tests conditions associated with a fronthaul in an Open Radio Access Network (O-RAN). The test device can field test an O-RAN radio unit (O-RU) installed at a cell site by emulating an O-RAN distributed unit (O-DU) in the O-RAN connected to the O-RU via the fronthaul of the O-RAN. The testing includes executing managing plane (M-plane) and synchronization plane (S-plane) messaging to test management session establishment, device setting testing, and master clock synchronization testing.

The invention provides an optical fiber borne radio frequency signal ROF transmission system and transmission method, the system comprises a wireless coverage subsystem, a passive optical network PON broadband access subsystem and a first multiplexer / demultiplexer, the wireless coverage subsystem comprises a base station, at least one remote radio frequency coverage point RFP and UE, and the first multiplexer / demultiplexer comprises at least one radio frequency signal. The PON broadband access subsystem comprises an optical line terminal (OLT) device, a passive optical distribution network (ODN) and at least one optical network unit (ONU) device, the base station comprises a first ROF module, and the RFP comprises a second multiplexer / demultiplexer and a second ROF module. Through the ROF transmission system and the ROF transmission method, a passive optical network (PON) used by a home broadband can be used for forward transmission of radio frequency signals, the deployment cost of an indoor distribution system is greatly reduced, the deployed ODN is effectively utilized, and meanwhile, the technical prejudice that only point-to-point architecture deployment can be adopted on the same wavelength in the ROF technology is overcome.

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.

A method performed by a system having a plurality of base stations, each base station system comprising a baseband unit (BBU) and a radio unit (RU) interconnected via a fronthaul connection that is shared between the base station systems. Fronthaul capacity information on transmission capacity of the shared fronthaul connection and information on required capacity for transmission and / or reception of wireless signals by the RU of the respective base station system are obtained. Time unit transmission restrictions for the respective base station system is determined based on the fronthaul capacity information and on the information on required capacity, which time unit transmission restrictions results in fronthaul usage below the transmission capacity of the part of the fronthaul connection. Information on the determined time unit transmission restrictions is sent to the BBU of the respective base station system.