533 results about "Fronthaul" patented technology

A method of wireless communication at a wireless repeater device controlled by a base station in a wireless communication network includes receiving, from the base station, control signaling comprising control information, in association with traffic relayed through the repeater device between a first wireless communication device and a second wireless communication device; and configuring a relay unit of the repeater device to communicate the traffic between the first wireless communication device and the second wireless communication device using at least one of: the time division duplex state, the fronthaul-link TCI state index, the access-link TCI state index, or the time domain resource allocation.

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.

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.

Disclosed in the present invention is an integrated sensing and communication (ISAC) cooperative transmission method based on a space-time block coding (STBC) OFDM signal, comprising: establishing an ISAC cooperative transmission system model based on an STBC-OFDM signal, and receiving an integrated signal echo containing state information of an unmanned aerial vehicle while implementing joint transmission to the unmanned aerial vehicle performed by multiple base stations using an STBC-OFDM integrated signal; the unmanned aerial vehicle pre-processing received communication signals to achieve orthogonal separation of s2m-1 and s2m and cooperative transmission diversity gain; processing echo signals received by a first base station and a second base station to acquire observation information of the first base station and the second base station for the unmanned aerial vehicle; implementing multi-base station cooperative tracking and trajectory prediction of the unmanned aerial vehicle by using an extended Kalman filter method; and the base stations uploading observation parameters to a control center by means of fronthaul links, and the control center fusing sensing results of the multiple base stations and performing tracking and prediction on the trajectory of the unmanned aerial vehicle by using the extended Kalman filter method.

Disclosed is a method performed by a first radio unit, RU, (140) of a distributed base station system (100), the first RU (140) comprising Ni antennas (141, 142), the distributed base station system (100) further comprising a first aggregation unit, AU, (120) connected to the first RU (140) via a first AU fronthaul, FH, link (145) and a second RU (150) connected to the first AU (120) via a second AU FH link (155), the second RU (150) comprising N2 antennas (151, 152), the distributed base station system (100) further comprising a BBU (110) connected to the first AU (120) over a first BBU FH link (115). The method comprises receiving, from a first number of UEs (181, 182, 183), uplink, UL, data streams comprising first user layers of the first number of UEs (181, 182, 183). The method further comprises obtaining a first channel estimate of a communication channel between the first number of UEs (181, 182, 183) and the first RU (140), determining first intermediate beamforming weights, BFW, sending, to the first AU (120), the first intermediate BFW and obtaining first part of BFW based on the first UL channel estimate. The method further comprises beamforming the received UL data streams based on the obtained first part of BFW into intermediately-beamformed UL data streams that are sent to the first AU (120), or receiving, from the first AU (120), first RU-adapted second part of BFW determined based on an inverse calculation of a combination of the first intermediate BFW and second intermediate BFW, determined by the second RU (150), determining final BFW for the first RU based on the first part of BFW and the first RU-adapted second part of BFW, beamforming the UL data streams of the first user layers based on the determined final BFW for the first RU into completely beamformed UL data streams, and sending the completely beamformed UL data streams to the first AU (120).

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.

A method, system and apparatus are disclosed. A method in a network node is described. The network node includes a distributed unit (DU), where the DU is configured to communicate with a radio unit (RU) via a fronthaul interface (FI). The FI is in a signal path between the DU and the RU. The method includes selecting a plurality of identifiers to create one or more subgroups within an identifier group. The identifier group is represented by a group identifier, and each identifier represents a processing entity in the RU. The method also includes creating the one or more subgroups within the identifier group and determining one or more section extensions usable by one or more control plane (C-plane) messages sent with the group identifier to specify one subgroup of the one or more subgroups. The one subgroup is associated to a C-plane section.

Disclosed is a method performed by a BBU system of a wireless communication network, comprising a distributed base station system (100), which comprises a BBU (110) and an RRU (120) connected over a fronthaul link (140). The method comprises determining first and second parts of beamforming weights based on a determined downlink channel estimate, and compressing the second part of the beamforming weights. The first part of the beamforming weights is determined for performing interference cancellation between user-layer signals, and the second part is determined for expanding the user-layer signals to antenna signals. The BBU then sends the first part and the compressed second part of the beamforming weights to the RRU, as well as the user-layer signals, over the fronthaul link (140). The RRU (120) then beamforms the user-layer signals according to the first and the second parts of the beamforming weights before sending the signals to a number of UEs (131, 132, 133).

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.

A method for transmission of DownLink, DL, radio signals in a Distributed Multiple Input Multiple Output, D-MIMO, system of a Radio Access Network, RAN. The D-MIMO system comprises a Central Unit, CU, with Digital Signal Processing, DSP, a first remote radio-head and a second remote radio-head, an analogue optical fronthaul link.The method comprises receiving (500a) a respective first and second UL transmission from the wireless communications device via the respective first and second remote radio-head over the analogue optical fronthaul link.The method further comprises estimating (501a) a respective first and second effective UL channel for signals from the wireless communications device via the first and second remote radio-head based on applying DSP to the respective first and second UL transmission.The method further comprises estimating (503) a respective first and second calibration channel based on applying DSP to a respective first and second reference radio signal transmitted wirelessly between the first remote radio-head and the second remote radio-head.The method further comprises synchronizing (505) a respective first and second DL radio signal from the respective first and second remote radio-head to the wireless communications device by compensating the second DL transmission based on the estimated second effective UL channel, and further based on the estimated first and second calibration channels.

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.

Systems and methods for efficient time multiplexed digital beamforming in a network are described. In particular, the system (for example, a radio unit) receives a C-plane packet from a fronthaul interface and stores corresponding control information of the C-plane packet at a scheduler, stores beam weight information in one or more beam weight buffers, receives and stores data samples in data input buffers, receives processing information from a timer, receives one or more scheduling instructions for at least two of the data input buffers from the scheduler, sequentially retrieves the data samples from the at least two of the data input buffers based on the one or more scheduling instructions, and processes the retrieved data samples from the at least two of the data input buffers for beamforming within a single symbol duration based on synchronization of the one or more scheduling instructions.

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.

The invention belongs to the technical field of optical wireless communication, and particularly relates to a method for constructing a fronthaul system architecture by using a multiband auto-encoder. The method comprises the following steps: designing a self-coding framework of multiband joint coding, and realizing a forward transmission network architecture supporting multi-user access; wherein a data-driven neural network channel model is used for learning deterministic damage and random characteristics existing in a physical channel; and on the basis of a data-driven channel model, a multi-band full-neural network transceiver is constructed, and damage from a plurality of transceiving systems and propagation links is jointly optimized by using a gradient descent algorithm. According to the invention, various damages in a multi-band system and a channel link in the forward transmission network can be optimized in an end-to-end joint manner, the global optimal communication performance is realized, and large-scale efficient deployment is supported. Experimental results show that 1.9 dB receiving optical power sensitivity gain can be realized. The method also has excellent robustness and stability, and can realize the average Q value gain of 1.41 dB in a turbulent channel.

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 a network node is provided. The method comprises configuring a first portion of bits from an identification field comprising multiple bits to represent one or more UEs. The method further comprises configuring a second portion of bits from remainder of the identification field to represent one or more user layers associated with the one or more UEs. The method further comprises sending the identification field comprising the first portion of bits and the second portion of bits via a fronthaul interface protocol.