389 results about "Fronthaul" patented technology

A method performed by a radio unit (RU) is provided. The method includes receiving, by the RU, sounding reference signals (SRSs), receiving, by the RU from a distributed unit (DU) via a fronthaul interface, a control plane (C-plane) message including SRS configuration information, performing, by the RU, channel estimation based on the SRSs and the SRS configuration information, and performing, by the RU, beamforming on the basis of the channel estimation.

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.

The invention discloses detection equipment, communication equipment, a detection method and a communication system, which are applied to the technical field of communication based on an optical path and are used for carrying out transmission fault detection on an optical transmission path. The optical transmission path comprises a home-end optical module assembly, a plurality of home-end wavelength division optical link groups, a home-end combiner / splitter and a plurality of far-end wavelength division optical link groups which are sequentially coupled. According to the scheme, based on the characteristic that the detection precision of the OTDR detection function is greater than the filtering precision of the multiplexer / demultiplexer, detection of transmission faults on different optical links coupled by the multiplexer / demultiplexer can be realized. Through the above mode, no extra detection device needs to be arranged, and cross-link comprehensive detection of different optical links coupled on the combiner / splitter can be realized by adopting a conventional device for realizing optical transmission based on the combiner / splitter. According to the invention, the transmission fault of the optical transmission path can be detected comprehensively with low cost and high precision, and the method can be applied to forward transmission networking of wireless communication and / or optical communication networking.

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.

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 testing connectivity of the O-RU to the fronthaul. 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. Additionally, optical insertion loss in the fronthaul and frequency and power of signals transmitted from the O-RU can be tested.

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.

The invention discloses access network equipment and a communication method, relates to the technical field of communication, and can reduce the flow of a forward transmission interface and improve the communication performance. The access network equipment comprises a first network element and a second network element in communication connection with the first network element, wherein the first network element comprises a wireless resource control function, a packet data convergence layer protocol function, a non-real-time part of a wireless link control function and a non-real-time part of a media access control function; the second network element includes a non-real-time portion of the physical layer functionality and a real-time portion of the physical layer functionality.

A communication system includes a core network and a radio access network including a central unit communicatively coupled to (i) the core network via a backhaul network, and (ii) a plurality of distributed units via a fronthaul network. Each of the distributed units is co-located with a radio unit and comprises a multi-access edge computing (MEC) module. The MEC module of each of the distributed units comprises one or more processors and memory storing one or more programs to be executed by the one or more processors, the one or more programs including instructions for controlling a time-sensitive networking (TSN) configuration and executing one or more MEC applications using the TSN configuration.

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.

The present disclosure relates to scheduling of radio access network (RAN) data traffic to be transported in a communication network. In an aspect, a method of a RAN scheduler (18) is provided of scheduling RAN data traffic to be transported in a communication network (10). The method comprises receiving (S102), from a fronthaul device (17), an indication of impending fronthaul congestion associated with at least one fronthaul data traffic flow, and adapting (S103) scheduling of RAN data traffic based on the acquired indication, the adapted scheduling being performed to mitigate the indicated impending fronthaul congestion associated with the at least one fronthaul data traffic flow.

According to embodiments, a method performed by a radio unit (RU) may comprise an operation of receiving configuration information for a remote interference management (RIM)-reference signal (RS) from a distributed unit (DU). The method may comprise an operation of receiving a message containing bit data for the RIM-RS from the DU. The method may comprise an operation of generating a complex-valued symbol corresponding to the bit data for the RIM-RS. The method may comprise an operation of generating a RIM-RS signal by performing at least one of phase rotation or phase difference compensation for the complex-valued symbol on the basis of the configuration information. The method may comprise an operation of generating a baseband signal corresponding to the RIM-RS signal on the basis of an inverse fast fourier transform (IFFT) and cyclic prefix (CP) insertion of the RU.

A method performed by an open radio access network (O-RAN) distributed unit (O-DU) in a wireless communication system, the method includes: generating a control plane message comprising User Equipment (UE) scheduling information; and transmitting the control plane message to an open radio access network (O-RAN) radio unit (O-RU). The control plane message further includes section extension information. The section extension information comprises bit masking information indicating antennas to be combined.

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.

The present disclosure relates to a method of a transport network node (13a) of performing load balancing in a transport network (10), and a transport network node (13a) performing the method. In an aspect, a method of a transport network node (13a) of performing load balancing in a transport network (10) is provided. The method comprises receiving (S101) a data traffic flow to be transmitted over the transport network (10) from a source radio access network, RAN, node (11a) to a destination RAN node (12a) connecting to the transport network (10), identifying (S102) a plurality of data traffic sub-flows forming the data traffic flow from the source RAN node (11a) to the destination RAN node (12a), determining (S103) one or more routing paths via which the identified data traffic sub-flows can be transmitted to a next-hop node(13b, 13g) in the transport network (10) and if there are multiple possible routing paths, alternating (S104) the transmission of identified data traffic sub-flows from the data traffic flow via determined different routing paths to attain load balancing in the transport network (10).

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 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). The present disclosure provides methods and systems for reducing fronthaul bandwidth. Embodiments herein relate to the field of wireless networks and more particularly to reducing fronthaul bandwidth during a transfer of data between at least one radio node and at least one centralized node in a wireless network. A method disclosed herein includes determining parameters specific to at least one User Equipment (UE) using a machine learning method. The method further includes transferring data between the at least one radio node and the at least one centralized node over a fronthaul link by compressing the data using the parameters that are determined using the machine learning method. The method further includes decompressing, by at least one of the at least one radio node and the at least one centralized node, the compressed data using the parameters that are determined using the machine learning method.

In embodiments, a method performed by a radio unit (RU) may comprise an operation of receiving sounding reference signals (SRSs). The method may comprise an operation of receiving a control plane (C-plane) message including SRS configuration information from a distributed unit (DU) via a fronthaul interface. The method may comprise an operation of performing channel estimation on the basis of the SRSs and the SRS configuration information. The method may comprise an operation of performing beamforming on the basis of the channel estimation.

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.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. In accordance with an aspect of the disclosure, a method for minimizing noise and interference in a communication network is provided. The method comprising: estimating channel based on reference signals transmitted by user equipment (UEs) and plurality of received signals, determining noise and interference sample based on estimated channel, generating noise and interference co-variance matrix based on noise and interference sample, generating an extended channel matrix including estimated channel and at least part of noise and interference covariance matrix based on the number of UEs, generating resultant signal based on extended channel matrix and plurality of received signals, and performing, based on resultant signal, equalization by applying equalization matrix across extended channel matrix. The present disclosure eliminates intra-cell and inter-cell interferences, reduces matrix elements, fronthaul load, computational complexity.

It is provided a method for determining packet loss in a fronthaul link between a baseband node and a radio node of a radio access network. The method being performed in a packet loss determiner. The method comprises: detecting at least one empty input data slot of a plurality of input data slots of a communication chain operation in a first time period, wherein the communication chain operation is one in a sequence of communication chain operations in a device on a receiving end of the fronthaul link; determining that data was intended to be provided to the at least one empty input data slot; and determining that a packet loss has occurred in the fronthaul link, based on the detecting the at least one empty input data slot and the determining that data was intended to be provided.

A communication system and method for on-demand establishment of communication infrastructure over the target area comprising multiple Unmanned Aerial Vehicle (UAVs) mounted Flying Remote Radio Heads (F-RRH) (106) to provide communication services over the target area, one or more Static Remote Radio Heads (S-RRH) (102), one or more Base Band unit (BBU) antennas (103), optical fronthaul link (104) for connecting the S-RRH (102) and the BBU antennas (103) to a BBU-pool (101) and transceiver module on the F-RRH (106) for connecting with BBU antennas (103) through a dedicated optical fronthaul link (104) and / or connecting with transceiver module on the S-RRH (102) through an extended wireless fronthaul link (108), whereby each of the F-RRH transceiver modules is enabled for an opportunistic fronthauling which associates the F-RRH to its nearest working S-RRH for faster establishment of the fronthaul link though spectrum prediction and sensing.

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.