116 results about "Distributed antenna system" patented technology

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 invention provides an indoor distribution system fault diagnosis method and device, a repair method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of communication. The diagnosis method comprises the steps that multi-source data of an indoor distribution system are acquired, and the multi-source data comprise user terminal signal quality data, indoor distribution equipment state data, indoor distribution equipment configuration information, environment data and network management data; positioning multi-source data of the fault room subsystem according to a preset fault feature library; the multi-source data of the fault room subsystem are analyzed from the terminal level, the equipment level, the area level and the system level, and the fault type of the fault room subsystem is diagnosed. The problem that faults are difficult to comprehensively and accurately locate due to the fact that a single data source or a simple monitoring means is mostly depended in the prior art is at least solved. The method is suitable for fault diagnosis and repair scenes.

This invention relates to a DAS comprising a digital donor interface circuit, an RF donor interface circuit, a first DAS propagation path, a second DAS propagation path, and a radio unit and configured to obtain a first propagation time delay for the first DAS propagation path and a second propagation time delay for the second DAS propagation path, obtain at least one of a time delay of the RF donor interface circuit and the digital donor interface circuit, determine a first downlink time delay value, and transmit the first downlink time delay value to a delay adjustment circuit in a downlink path of the DAS.

At a high level, the technology disclosed herein relates to methods, systems, media, etc., for a network coverage optimization engine. In embodiments, network coverage can be optimized by applying particular updates, changes, etc., to a network configuration for one or more coverage areas provided by one or more base stations (e.g., a macro base station, another type of outdoor base station, an indoor cell, a distributed antenna system). For example, the network configuration can be determined based on one or more particular radio frequency (RF) performance metrics for a coverage area being below a threshold. In embodiments, one or more machine learning models may be implemented to predict signal coverage changes upon applying the determined network configuration based on the collected data for the coverage area (e.g., network data, user device network feedback, user device location data, environmental profiles for the coverage area, etc.).

This invention discloses a high-performance communication transmission method based on 5G distributed antenna cooperative networking, specifically relating to the field of distributed antenna communication technology. It addresses the problems of existing distributed antenna systems relying on explicit control signaling for node scheduling, power allocation, and beam control, resulting in high signaling overhead, high scheduling delay, and low cooperative efficiency in high-speed mobile and complex channel environments. By mapping transmit power levels, energy storage unit voltage states, and beam pointing information to the amplitude, phase, and subcarrier distribution characteristics of the pilot sequence, multi-dimensional control information is implicitly carried at the physical layer. User equipment then analyzes the superimposed pilots to complete the selection of the dominant antenna node and beam pointing correction feedback. This allows each antenna node to perform cooperative transmission and adaptive adjustment based on the feedback results, thereby achieving efficient and stable distributed cooperative communication without the need for additional control signaling.

To provide a distributed antenna system with an increased operational flexibility, with eliminating constraints regarding shared use of infrastructure.SOLUTION: According to an embodiment, a distributed antenna system includes a master unit, and a remote unit having an antenna capable of covering a first band and a second band neighboring to the first band. The master unit includes a base station connection part, a slave station connection part, a detection part, and an operation control part. The base station connection part is capable being connected to a first base station to which a first band is allocated and a second base station to which a second band is allocated. The slave station connection part is capable being connected to the remote unit. The detection part detects a downlink signal in the first band. The operation control part allows an operation configuration in which a time division multiplexing pattern in the second band and a time division multiplexing pattern in the first band are different, in a period in which loss of the downlink signal in the first band is detected from the output of the detection part.SELECTED DRAWING: Figure 3

The invention discloses a method and a device for determining an antenna installation position, and electronic equipment. The method comprises the steps that an indoor plane structure chart of an underground garage is acquired, and the indoor plane structure chart is used for determining structure data; according to the structural data, determining that the power value received by the terminal is greater than the farthest coverage distance of the preset minimum receiving power; and according to the farthest coverage distance, the antenna installation position in the underground garage is determined. The technical problems that a traditional indoor distributed antenna system is high in manufacturing cost and too many in information source and antenna number in an underground garage scene are solved.

A universal digital card, UDC (122) for use in a node of a distributed antenna system, DAS (100), the UDC (122) comprising: an external digital interface (124) to communicatively couple the UDC (122) to an external communication link used to transmit and receive data in any of a plurality of different external interface formats; and wherein the UDC (122) is configured to: receive data formatted according to any of the plurality of external interface formats from the external communication link via the external digital interface; communicate data formatted according to any of the plurality of external interface formats over the external communication link via the external digital interface; and wherein the UDC (122) is configured to be selectively used either as: a donor card to communicatively couple the node to one or more base station entities (108) via the external digital interface; or a distribution card to communicatively couple the node to one or more non-DAS nodes, hubs, switches, or remote radio heads or one or more other DAS nodes or access points.

One embodiment is directed to a virtual distributed antenna system (vDAS) that comprises one or more self-configuration entities configured to: determine characteristics of one or more donor base stations: determine available resources that are available to implement the vDAS; determine, using the characteristics of the one or more donor base stations and the available resources available to implement the vDAS, a scaled configuration for the vDAS to serve the one or more donor base stations that is scaled so that the available resources available to implement the vDAS are sufficient to implement the vDAS in accordance with the scaled configuration; and configure the vDAS to serve the one or more donor base stations in accordance with the scaled configuration by executing the scalable vDAS software on physical server computers in accordance with the scaled configuration. Other embodiments are disclosed.

Systems and methods for base station performance statistics collection in distributed antenna systems are provided. In certain embodiment, a system includes a distributed antenna system comprising at least one processor, wherein executable code directs the at least one processor to decode messages from and to user equipment in communication with the distributed antenna system. The system also includes a database, wherein the at least one processor stores parameters identified in the decoded messages in the database. Further, performance of the distributed antenna system is adjusted based on the stored parameters.

Methods, systems, and devices are disclosed for optimizing a radiation pattern of an indoor ceiling and / or wall mounted radio unit for a distributed antenna system / radio point system (DAS / RDS). According to one aspect, a method includes obtaining beamforming weights for generating a shaped radiation pattern that provides a same effective isotropic radiated power (EIPR) at a plurality of locations within a target cell; and applying the obtained beamforming weights to a signal directed to an array of antenna elements of a radio interface to generate the shaped radiation pattern.

This invention discloses a radio frequency (RF) activation method, apparatus, electronic device, and medium for an indoor distributed antenna. The method includes: performing three-dimensional local peak detection on target wall nodes of a target building to obtain target anchor points; projecting a two-dimensional continuous probability map, determined by superimposing parameter information of the target cores of all target anchor points, onto the target beam angular domain of each distributed antenna element to determine the coverage occupancy rate of each beam element in the target beam angular domain; allocating transmit power vectors to the target beam angular domain based on the coverage occupancy rate; determining the target RF chain for each beam element in the target beam angular domain based on the angular difference between two adjacent beam elements in the target beam angular domain; and transmitting the transmit power vector of the target beam angular domain and at least one target RF chain to the corresponding distributed antenna element in the target beam angular domain. This invention enables an indoor distributed antenna system to significantly reduce RF link power consumption while ensuring RF link quality.

This invention provides a method and system for transmitting multi-point positioning signals in an indoor distributed antenna system (DAS), belonging to the field of satellite positioning technology. The method includes: acquiring multiple mobile communication signals and multiple positioning signals; obtaining a time-division multiplexed signal based on the multiple positioning signals and preset positioning signal parameters; performing a multiplexing process on the time-division multiplexed signal and the multiple mobile communication signals to obtain a hybrid transmission signal; transmitting the hybrid transmission signal to at least one receiving point in the DAS; separating the hybrid transmission signal at the receiving point to obtain multiple separated positioning signals and multiple mobile communication signals; performing time delay compensation processing on the multiple separated positioning signals to obtain delay-compensated multiple positioning signals; and performing a multiplexing process on the delay-compensated multiple positioning signals to obtain an output positioning signal, which is then transmitted through a positioning antenna. This scheme achieves time-division multiplexing transmission and precise positioning of multi-point co-frequency satellite signals in an indoor DAS.

This document relates to techniques for providing connectivity features in a radio access network. For instance, the disclosed techniques can employ a middlebox to process fronthaul traffic relating to communications between distributed units and radio units of a radio access network. The processing can provide various connectivity features, such a distributed antenna system connectivity feature, a distributed multiple-input and multiple-output connectivity feature, and / or a radio unit sharing feature that involves sharing of a particular radio unit among two or more distributed units. The processing can also provide an application programming interface for accessing scheduling information, signal quality measurements, buffer status, random access attempts, and / or network load relating to the fronthaul traffic.

One embodiment is directed to a virtualized distributed antenna system (vDAS) comprising: a plurality of physical server computers on which scalable vDAS software is executed to perform a plurality of roles for the vDAS; and a plurality of access points (APs), each of the APs communicatively coupled to at least one of the physical server computers. The vDAS is configured to: determine if there has been a failure in performing a first role included in the plurality of roles performed for the vDAS, the first role performed using a first physical server computer included in the plurality of physical server computers; and, in response to the failure in performing the first role using the first physical server computer, perform the first role using a second physical server computer included in the plurality of physical server computers. Other embodiments are disclosed.

A wireless communication method in a distributed antenna system including a base station and a plurality of antennas that communicates with one or more terminal stations by spatial multiplexing according to control of the base station, the wireless communication method including: calculating, for each candidate terminal station, a partial weight matrix based on channel information acquired between a plurality of antennas of the candidate terminal station to be subjected to communication by spatial multiplexing using two or more antennas among the plurality of antennas and the two or more antennas used for the spatial multiplexing; multiplying a transmission signal for the candidate terminal station by the calculated partial weight matrix for the candidate terminal station; and transmitting, to each candidate terminal station, the transmission signal for the candidate terminal station multiplied by the partial weight matrix for the candidate terminal station.

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 application discloses a kind of distributed antenna system joint timing and frequency offset estimation method, it belongs to communication technical field.The application aims to solve the problem of poor real-time performance of existing DAS synchronization method for joint estimation of multiple time offsets and multiple frequency offsets in DAS.The application proposes a method for joint timing and frequency offset estimation in DAS based on the good correlation characteristics of CAZAC sequence and multiple antenna synchronization sequences, which can simultaneously estimate the time offset and frequency offset of different transceiver antenna pairs.The application uses sliding cross-correlation operation and effective peak detection to estimate the time offset and integer multiple frequency offset of different transceiver antenna pairs, and uses cyclic correlation operation to estimate the fractional multiple frequency offset of different transceiver antenna pairs.Furthermore, the application uses simultaneous detection to achieve joint estimation of the time offset and frequency offset of different transceiver antenna pairs, which has low complexity and high real-time performance, and can ensure the accuracy of the estimation result.The application can be applied to timing and frequency offset estimation of distributed antenna system.

The present disclosure relates to a distributed antenna system and a signal transmission method. A first remote cascaded chain corresponding to a first channel set and a second remote cascaded chain corresponding to a second channel set are obtained by means of division, such that when a distributed antenna system needs to support multi-channel MIMO, remote units in the first remote cascaded chain and remote units in the second remote cascaded chain only need to be configured with communication link modules, the number of which is less than the number of channels, and the multi-channel MIMO is jointly supported by using the remote units in the first remote cascaded chain and the remote units in the second remote cascaded chain, such that the multi-channel MIMO capability of an overlapping region can be realized.

A distributed antenna monitoring system 1400 comprises a plurality of transmitters TX positioned in proximity to a plurality of respective antennas ANT. Each of the plurality of transmitters TX are as

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 provides a method of operating a distributed antenna system (DAS) interworking with a spectrum sharing system (SSS) including: transmitting, by a node unit of the DAS, DAS information to a management system entity (MSE); generating, by the MSE, linkage information based on the DAS information and radio service device (RSD) information received from at least one RSD of the SSS; transmitting, by the MSE, the interworking information to a system controller of the SSS; receiving, by the MSE, allocation information including a result of allocating shared radio resources to the DAS and the at least one RSD, respectively, according to the interworking information from the system controller; transmitting, by the MSE, the allocation information to the node unit; and operating, by the node unit, according to the allocation information.

One embodiment is directed to a system to provide wireless coverage for a plurality of cells. The system comprises a virtualized headend and a plurality of remote units. The system is configured to operate as a distributed antenna system (DAS) when serving at least one of the cells. The plurality of remote units is configured to communicate with the virtualized headend using a switched Ethernet network. The virtualized headend is configured to communicate downlink user-plane data including frequency-domain IQ data and downlink control-plane data for a first cell served by at least one open radio access network (O-RAN) distributed unit (DU) to at least some of the remote units used to serve the first cell. At least some physical layer baseband processing for a wireless interface used to serve the first cell is performed by the virtualized headend or the remote units used to serve the first cell.

The application provides a distributed antenna system and a frequency band permission method thereof. The distributed antenna system comprises a near-end device and one or more remote-end devices connected to the near-end device. The frequency band permission method comprises the following steps: the near-end device acquires an activation code of a to-be-authorized frequency band, acquires frequency band permission information according to the activation code, and informs the remote-end device to activate a radio frequency link corresponding to frequency band information in the frequency band permission information. The application realizes the frequency band permission function of the distributed antenna system, meets the requirement of selectively opening part of the frequency bands by the customer, and reduces the initial operation cost of the operator.

A time-frequency synchronization method includes: determining a first frequency domain signal and a synchronization signal block, SSB, index based on a carrier frequency band corresponding to a signal received by a distributed antenna system, DAS, near-end device; determining a demodulation reference signal, DMRS, estimated frequency offset and a channel estimation matrix based on the first frequency domain signal and the SSB index; determining, based on the DMRS estimated frequency offset and a blind frequency offset compensation value, an oscillator offset; determining a first time domain position difference between a primary synchronization signal, PSS, correlation peak and a system frame header based on the first frequency domain signal and the channel estimation matrix; and performing time-frequency synchronization based on the oscillator offset and the first time domain position difference.

The present disclosure is directed to a Distributed Antenna System (DAS) comprising a master unit (MU) and a plurality of access points (APs) communicatively coupled with the MU and configured to wirelessly communicate with a plurality of UEs via a respective set of antennas. The MU is configured to receive a plurality of capability information messages from the plurality of APs, each message comprising information indicating a number of antennas associated with a corresponding AP; generate at least one group of APs from the plurality of APs by processing the plurality of messages; generate at least one combined capability information message corresponding to the at least one group of APs, each combined message comprising information indicating a number of antennas associated with a corresponding group of APs; and transmit the at least one combined message to a donor base station (BS) for configuring Massive MIMO operations of the donor BS.

A low-profile, highly isolated, ultra-wideband multiple-input and multiple-output (MIMO) antenna for use in a distributed antenna system includes: (a) a feeding circuit on a dielectric substrate that includes a coplanar waveguide (CPW) including a signal feed and a return that includes first and second return sections coplanar with and apart from the signal feed; (b) first and second radiator circuits including first and second monopole radiators, respectively, the first and second return sections being coplanar with and spaced apart from the first monopole radiator; (c) a decoupling circuit, disposed on a first side of the dielectric substrate, that includes a conductive strip for reducing mutual coupling between the first and second radiator circuits; and (d) a matching circuit including a plurality of stubs disposed on a second side of the dielectric substrate opposite the first side, the matching circuit being operable to reduce return loss of the MIMO antenna.

A method for monitoring a distributed antenna system includes: at a relay device, receiving a first operation monitoring signal sent by the near-end device, where the first operation monitoring signal carries an operation monitoring message, and the operation monitoring message includes a device address of a monitoring target device; determining whether to parse the first operation monitoring signal according to a connection status with the near-end device; in response to a determination to parse the first operation monitoring message signal, parsing the first operation monitoring signal to confirm the monitoring target device and to determine whether to respond to the operation monitoring message; and in response to a determination to respond to the operation monitoring message, responding to the operation monitoring message according to the monitoring target device as confirmed.

This station establishment design device comprises: an area setting unit that sets an area for which to perform station establishment design; a distributed antenna system (DAS) position candidate setting unit that sets a plurality of antenna position candidates that are candidates for installation positions of a DAS; a user equipment (UE) position setting unit that sets a plurality of UE positions at which a UE can be present; a distance calculation unit that calculates distances for all combinations of the antenna position candidates and the UE positions; an angle calculation unit that calculates, for all of the combinations, the azimuth angles of the antenna position candidates as viewed from the UE positions; a propagation path calculation unit that calculates propagation paths for all of the combinations; a determination unit that determines, on the basis of the calculated distances and the calculated propagation paths, whether a UE position can be covered by an antenna position candidate; and a selection unit that, on the basis of the result of the determination, selects the installation positions for the DAS such that an objective function using the angular spread of the calculated azimuth angles is maximized while all the UE positions are covered by at least a prescribed number of antenna position candidates.

The present invention provides a diagnostic detection device for detecting an RF signal outputted from an antenna, wherein an RF signal transmitted from a repeater is received and outputted as the RF signal into the air by means of the antenna via a transmission line. The diagnostic detection device may comprise: a broadband energy harvester coupling an RF signal transmitted via the transmission line to acquire RF power for each of a plurality of broadband bands; an energy management system managing the RF power acquired via the broadband energy harvester and storing the RF power as DC energy; and a communication module having a corresponding power detection port monitoring a DC voltage for each frequency band of the broadband energy harvester, and monitoring output power in each frequency band via the power detection port.