35 results about "Fronthaul" patented technology

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.

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 processing system including at least one processor deployed in a non-terrestrial network node may identify a plurality of available baseband units of a cellular network and may select a first baseband unit from among the plurality of available baseband units via a machine learning model implemented by the processing system. The processing system may then establish a fronthaul connection between the non-terrestrial network node and the first baseband unit, where the fronthaul connection is via a first wireless link between the non-terrestrial network node and the first baseband unit. The processing system may further forward data traffic for at least one endpoint device via the fronthaul connection and via at least a second wireless link between the non-terrestrial network node and the at least one endpoint device.

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

This application discloses a communication method, apparatus, and system, relating to the field of wireless communication technology, which can reduce downlink fronthaul traffic. In this application, a first logic unit can receive a layer 2 scheduling result and a first weight from a second logic unit, and obtain a second weight for beamforming based on the layer 2 scheduling result, the first weight, and the channel estimation result. By having the first logic unit and the second logic unit each be responsible for a portion of the calculation of the second weight, the downlink fronthaul traffic of the second logic unit can be reduced.

The present application relates to the technical field of wireless communications. Disclosed are a communication method, apparatus and system, which can reduce downlink fronthaul traffic. In the present application, a first logic unit can receive a layer-2 scheduling result and a first weight from a second logic unit, and obtain a second weight for beamforming on the basis of the layer-2 scheduling result, the first weight and a channel estimation result. The first logic unit and the second logic unit are each responsible for a portion of the calculation of the second weight, so that the downlink fronthaul traffic of the second logic unit can be reduced.

Disclosed are a method and device for communication using a fronthaul interface. An operation method of an O-RU includes the steps of: generating a plurality of first measurement results by performing measurement operations on a first measurement target in a single notification period according to a notification interval; generating a first measurement result list including the plurality of first measurement results; and transmitting, to an O-DU, a message including the first measurement result list.

A device of a radio unit (RU) can comprise a transceiver, at least one processor, and a memory for storing instructions. The instructions, when executed individually or collectively by the at least one processor, can cause the device to: acquire, from a distributed unit (DU), a control plane message comprising extension type information for detecting a random access preamble; and transmit, to the DU, an uplink message comprising information about random access preambles. The random access preambles can be detected on the basis of the extension type information. The extension type information can comprise indication information for detection random access preambles, and information about the maximum number of reporting random access preambles.

The present disclosure relates to a method of a transport network node (13a) performing load balancing in a transport network (10) and a transport network node (13a) performing the method. On the one hand, a method of a transport network node (13a) performing load balancing in a transport network (10) is provided. The method comprises receiving (S101) a data traffic flow to be transmitted through the transport network (10) from a source radio access network (RAN) node (11a) to a destination RAN node (12a) connected with 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, transmitting (S104) the identified data traffic sub-flows in the data traffic flow via the determined different routing paths alternately to implement load balancing in the transport network (10).

In general, the current subject matter relates to clock selection in a fronthaul network. In some implementations, clock selection in a fronthaul network can include selecting one distributed unit (DU) from among a plurality of DUs communicatively coupled to a radio unit (RU) to serve as a primary clock for a communication system including the plurality of DUs, the RU, and a service management and orchestration (SMO), and transmitting a request to the RU that triggers the RU to select one of the DUs to become the primary clock. The SMO can be communicatively coupled to the RU and the plurality of DUs.

Disclosed is an apparatus of an Open Radio Access Network (ORAN) Radio Unit (O-RU) (402) and a method (600) for managing cells of a communication network in the ORAN environment. The O-RU (402) identifies each cell of a plurality of cells of the communication network supported by an apparatus of the O-RU (402) based on an identification information associated with each cell. Using the identification information, an Internet Protocol (IP) address is assigned to one or more fronthaul interfaces of each cell of the plurality of cells. One or more of the IP address and the identification information of each cell are published to a plurality of ORAN Distributed Units (O-DUs) (404) for identifying one or more O-DUs available for establishing an independent connection with a respective cell of the plurality of cells supported by the O-RU (402).

Aspects of the subject disclosure may include, for example, a method that includes receiving, by a processing system, an uplink signal at a radio unit (RU) communicating over a fronthaul interface with a distributed unit (DU) of a communication network; receiving a demodulated reference signal (DMRS) configuration at the RU; performing a beamforming procedure at the RU for one or more beams generated at the RU; and determining, in accordance with an option selected by the DU, whether to perform an equalization procedure for the uplink signal at the RU resulting in equalized user data. In accordance with the equalization procedure being performed at the RU, equalization for the uplink signal is not performed at the DU. Other embodiments are disclosed.

A communications network system including antenna elements and a processor coupled with the antenna elements, the processor executing instructions to perform operations including establishing a first data communication link over a first frequency band between the CPU and the first AP of a first group of APs, causing the first AP to establish a second data communications link over a second frequency band between the first AP and a first UE, transmitting, via beamforming by the antenna elements, data to the first AP over the first data communications link, the data configured to be relayed via the first AP to the first UE over the second data communications link, obtaining an end-to-end data rate of the data communication between the CPU and the first UE, and achieving a higher end-to-end data rate than the obtained end-to-end data rate by adjusting beamforming vectors.

In a method for managing an antenna device through a fronthaul multiplexer device according to an aspect of the present invention, configuration information of an antenna device is transmitted to a fronthaul multiplexer device, and whenever each antenna device is activated, the fronthaul multiplexer device transmits, on behalf of a distributed base station device, the configuration information of the antenna device, so as to reduce the burden on the distributed base station device and enable an efficient antenna device configuration.

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.

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

Certain aspects of this disclosure provide techniques for wireless communication by a first network entity. These techniques may generally involve generating messages having entries representing physical resource blocks (PRBs) for transmitting reference signals via a fronthaul interface using modulation and compression; transmitting messages to a second network entity via the fronthaul interface; and processing the reference signals transmitted in PRBs on the fronthaul interface using modulation and compression.

Methods, systems, and devices for wireless communications are described. Generally, the described techniques enable a radio unit (RU) to receive a control-plane packet that indicates control information, the control information indicating periodic resources. The RU may communicate, via the periodic resources, two or more periodic messages based on the control information. That is, rather than receive multiple control-plane packets for each periodic message, the RU communicates multiple periodic messages using the control information. In some examples, the RU may receive the control information and a periodicity of the periodic resources via a section type in the control-plane packet. In some other examples, the RU may receive the control information and the periodicity via a section extension of the control-plane packet.

This invention discloses a data transmission method, apparatus, device, and storage medium. The method includes: obtaining the number of ONUs, the bandwidth overhead introduced by the fronthaul, the guard interval of the ONU uplink transmission window, the bandwidth capacity of the PON network, the bandwidth overhead introduced by channel coding, the average bit rate of each ONU-to-OLT connection, and the length of the TTI transmission interval; determining the number of data blocks and the size of each data block within the TTI transmission time based on the number of ONUs, the bandwidth overhead introduced by the fronthaul, the guard interval of the ONU uplink transmission window, the bandwidth capacity of the PON network, the bandwidth overhead introduced by channel coding, the average bit rate of each ONU-to-OLT connection, and the length of the TTI transmission interval; and uploading data according to the size of each data block. Through the technical solution of this invention, block transmission can be flexibly performed, further reducing the total latency.

This invention discloses a distributed precoding method for cellular-free massive MIMO based on functional optimization, comprising the following steps: establishing a mathematical model of the cellular-free massive MIMO system, including a channel model, a channel estimation model, and a lower bound on the UatF reachable rate; establishing a distributed precoding optimization problem that minimizes the total transmit power while satisfying user QoS constraints and the power constraints of each access point (AP); transforming the optimization problem into a convex functional optimization problem and deriving the analytical structure of the optimal distributed precoding; designing a Lagrange multiplier iterative algorithm to solve for the optimal precoding parameters and proving its convergence; and calculating the final precoding vector and power allocation scheme based on statistical channel information and instantaneous local channel information. This invention significantly reduces the total transmit power of the system and substantially reduces fronthaul link overhead while strictly satisfying user QoS constraints, making it suitable for distributed radio access network architectures such as O-RAN.

Provided are a method of transmitting or receiving a control-plane message through a fronthaul interface and an electronic device performing the method. The method may comprise: 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 the first control-plane message to the RU through a fronthaul interface. The first section extension field may include a parameter indicating a number of UE IDs of a user associated with the first UE ID. The first control-plane message may be transmitted at a period longer than a slot.

Methods, systems, and devices for wireless communications are described. A first access point (AP) may communicate with a second AP via a first backhaul link using a first radio that operates on a first channel within a first frequency band and via a second backhaul link using a second radio that operates on a second channel within a second frequency band. The first AP may be a controller or agent AP that operates in a centralized or decentralized network. The first AP may send the second AP a backhaul link reconfiguration message that indicates a reconfiguration of a backhaul operation, termination of the second backhaul link, and a switch to operate the second radio on a third channel within the second frequency band for fronthaul communication. The first AP or the second AP may send a fronthaul message using the second radio and based on the backhaul link reconfiguration.

A radio unit (RU) includes: a radio frequency (RF) switch selectively coupled to one of an uplink path and a downlink path for time division duplex (TDD); at least one processor including processing circuitry; and at least one memory comprising one or more storage media and instructions stored therein, wherein the instructions, when executed individually or collectively by the at least one processor, cause the RU to: receive, from a distributed unit (DU), a control plane message within a downlink reception window; obtain a section for downlink scheduling based on a section type indicator and data direction information of a common header in the control plane message; and change a path to which the RF switch is coupled from the uplink path to the downlink path based on (i) a symbol number increment command and (ii) information indicating a number of symbols of the section for downlink scheduling.

Methods, systems, and devices for wireless communications are described. A first access point (AP) may communicate with a second AP via a first backhaul link using a first radio that operates on a first channel within a first frequency band and via a second backhaul link using a second radio that operates on a second channel within a second frequency band. The first AP may be a controller or agent AP that operates in a centralized or decentralized network. The first AP may send the second AP a backhaul link reconfiguration message that indicates a reconfiguration of a backhaul operation, termination of the second backhaul link, and a switch to operate the second radio on a third channel within the second frequency band for fronthaul communication. The first AP or the second AP may send a fronthaul message using the second radio and based on the backhaul link reconfiguration.

A method and system are provided for determining at least one Open Radio Access Network (O-RAN) element causing timing drift in an O-RAN network. Specifically, the method may include: receiving at least one fronthaul (FH) packet by a Radio Unit (RU), said at least one FH packet including the Time of Day (TOD) from a Distributed Unit (DU); detecting timing drift in the FH by the RU based on the received at least one FH packet; and identifying at least one O-RAN element causing timing drift in the FH by the RU based on the detected timing drift.

A communication control method for handing over a relay node from a source network node to a target network node, with the relay node being connected with the source network node via a fronthaul connection. The communication control method comprises transmitting, by the source network node, to the target network node, a request message for handing over the relay node; receiving, by the source network node, from the target network node, a response message; and transmitting, by the source network node, to the relay node, in response to receiving the response message, a message comprising a transaction ID.

A radio unit (O-RU) of the present invention amplifies an analog uplink signal received from a user terminal via an antenna by using a low-noise amplifier (LNA), converts the amplified analog uplink signal into a digital uplink signal by using an analog-to-digital converter (ADC), performs a signal processing operation including digital filtering and modulation to improve signal quality, then performs fast Fourier transform (FFT) on the digital uplink signal for orthogonal frequency division multiplexing (OFDM), detects noise in the frequency domain, removes the detected noise, then converts the signal into an eCPRI packet, and transmits same to a fronthaul multiplexer device.

The present disclosure relates to a hardware acceleration system in a virtualized Radio Access Network, vRAN, architecture. The system comprises a number of hardware accelerators (4), HA; a fronthaul, FH, switch (14) implemented between the HAs (4) and a number of associated Radio Units (5), RUs, wherein the FH switch (14) is configured to behave as a virtual HA towards the associated RUs (5) and as a virtual RU towards the HAs (4); an L1-L2 broker (15) implemented between the HAs (4) and a number of associated Distributed Units (1), DUs, wherein the L1-L2 broker (15) is configured to behave as a virtual HA towards the associated DUs (1) and as a virtual DU towards the HAs (4); and an orchestrating unit (16) configured to map the traffic of the RUs (5) and DUs (1) to individual ones of the HAs (4) for processing. Furthermore, a corresponding method of operating a hardware acceleration system in a vRAN architecture is disclosed.

In the method for managing an antenna apparatus by a front-haul multiplexer apparatus according to an aspect of the present application, configuration information of the antenna apparatus is transmitted to the front-haul multiplexer apparatus, and the front-haul multiplexer apparatus transmits the configuration information of the antenna apparatus on behalf of the distributed base station apparatus whenever each antenna apparatus is activated, so as to reduce the burden of the distributed base station apparatus and achieve efficient antenna apparatus configuration.