165 results about "Distributed antenna system" patented technology

System, devices, and methods facilitate determining positioning using distributed antenna system with service availability monitoring. Positioning methods include network based methods and handset assisted methods in addition to a monitoring system to report any service outage and possible location information loss. The system provides location information also at handset only level through application or apps and operating systems with online and off-line access to location database data. A combined monitoring system that monitors antenna output power for mobile coverage and service availability helps also in monitoring the availability of the localization system and dynamic update of lookup information. Monitoring system provides also asset tracking and service analytics features for the active or passive distributed antenna system.

The utility model relates to the technical field of wireless communication, and provides a passive frequency conversion wall-mounted antenna and an indoor double-path distributed antenna system, and the wall-mounted antenna comprises a reflecting plate, a high-frequency oscillator, a low-frequency oscillator, and a passive frequency conversion module. The high-frequency oscillator and the low-frequency oscillator are both arranged on the reflecting plate; the passive frequency conversion module is provided with an input port connected with a cable, the input port can input radio frequency signals with different polarizations through a feeder line, and the passive frequency conversion module is used for carrying out frequency conversion and distribution on the input radio frequency signals; the high-frequency oscillator and the low-frequency oscillator are both in communication connection with the passive frequency conversion module, and at least one of the high-frequency oscillator and the low-frequency oscillator is a dual-polarization oscillator. According to the utility model, through the arrangement of the passive frequency conversion module, only one feeder line is needed during connection, single-port input of the dual-polarized antenna is realized, transformation of a single-path distributed antenna system is facilitated, and the transformation difficulty and the transformation cost are reduced.

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.

Antenna monitoring systems and methods can include, among other things, a transmitter near each of the antennas in a distributed antenna system (DAS). The transmitter can transmit an antenna identifier corresponding to that antenna, so that the various transmitters in the DAS each transmit different antenna identifiers. These antenna identifiers can be detected by a receiver and can be processed to determine whether any antenna identifiers are missing. If any expected antenna identifier is missing, the receiver can infer that the antenna or a component associated with the antenna (such as cabling) may have failed. The receiver can then output an indication or notification that may be accessed by maintenance personnel and / or emergency personnel to enable them to identify and repair the non-functioning antenna or component. The transmitter can transmit other data, such as environmental data, RF data, or the like, to facilitate additional or alternative monitoring functionality.

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.

An energy efficient distributed antenna system (DAS) includes a signal distribution network that includes one or more antenna devices. Each of the one or more antenna devices is configured to receive and transmit signals via an antenna for wireless communications or via a wired connection for wired communications, each of the one or more antenna devices including one or more sensors for sensing an aspect of an environment of the associated antenna device to generate sensor data. The DAS further includes a sensor processor connected with the signal distribution network and configured to receive and process the sensor data, the sensor processor being further configured to control an energy consumption level of the signal distribution network based on the processed sensor data.

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.

Techniques are provided for streaming service data with streaming frames including subframe(s) of O-RAN data and / or management data and subframe(s) of time-domain digital baseband data. The streaming frames are transported in a DAS fronthaul network configured to be implemented with conventional Ethernet links.

Techniques related to accommodating multiple delay targets in a distributed antenna system are described. The distributed antenna system is configured to determine at least one equalized delay value for a plurality of remote units based on each of a plurality of delay targets. The distributed antenna system also controls signals transmission times of at least one node based on the at least one delay value so that downlink radio frequency signals are transmitted from each of the remote units with a total delay that satisfies each of the delay targets.

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 compression and decompression between elements of a wireless communications system (WCS) such as a distributed antenna system (DAS) contemplate performing a fast Fourier transform (FFT) operation before compression and transmission across a transport medium in a DAS. Further, a size of an FFT block may be varied based on latency requirements. For example, the FFT block size may be based on a sampling rate extracted from channel information. By selecting the FFT block size to meet latency requirements, overall throughput across the transport medium may be increased.

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.

A system and method for communicating and sensing for distributed antennas associated with a building. Each of a number of antennas distributed geographically within the building include one or more sensors, each of the one or more sensors being configured to sense an environmental condition associated with the building and generate sensor data. A sensor processor is configured to receive the sensor data and generate a digital map view of a portion of the building based on locations of the plurality of antennas, the map view including a digital representation of the sensor data.

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.

A distributed antenna system according to an aspect of the technical idea of the present disclosure comprises: a main unit; at least one hub unit selectively connected to the main unit; and a plurality of remote units each connected to the main unit or the at least one hub unit, wherein the distributed antenna system does not include a point of interest (POI) so that the main unit is directly connected to a distributed unit (DU) of a base station system through a cable.

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.

A method, network node and customer premises equipment (CPE) and apparatus for 3rd Generation Partnership Project (3GPP) Fifth Generation (5G) hybrid fiber coax (HFC)-distributed antenna system (DAS) network with machine learning beam management are disclosed. According to one aspect, a method in a network node includes determining a set of beam weights for each CPE of the plurality of CPE, each set of beam weights being associated with a synchronization signal block, SSB, beam index, each SSB index being associated with a window of time for communication between the network node and CPE associated with a beam ID; and transmitting an SSB index to CPE associated with the beam ID to indicate to the CPE the window of time for communication between the network node and the CPE.

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