699 results about "Distributed antenna system" patented technology

A distributed antenna system having a transport portion including at least one overhead power line for transmitting system information along its length, and a distribution portion including at least one local access point disposed along the length of the power line for providing local access to information transported by the transport portion.

A distributed antenna system is provided for communicating with a plurality of base stations. The distributed antenna system includes a system controller and a master unit communicating with at least one of the plurality of base stations. A remote unit communicates over a high data rate media with the master unit and / or a downstream remote unit. Alternatively, the distributed antenna system includes a controller and a digital time / space crosspoint switch controlled by the controller. A digitizing transceiver is in communication with the digital time / space crosspoint switch. The crosspoint switch is configured to transmit and receive digital data through the digitizing transceiver.

A distributed antenna system (DAS) includes a multiple-input and multiple-output (“MIMO”) base station configured to output at least a first and second signal, and a hybrid coupler coupled thereto, the coupler configured to receive the first and second signal from the MIMO base station on respective first and second ports and provide an output signal on at least one output port, the output signal including at least a portion of the first signal and at least a portion of the second signal. The DAS further includes a master unit communicating with the coupler and configured to receive at least the output signal, and at least one remote unit communicating with the master unit and configured to communicate the output signal to a device.

Optical fiber-based distributed antenna systems that support multiple-input, multiple-output (MIMO) antenna configurations and communications. Embodiments disclosed herein include optical fiber-based distributed antenna system that can be flexibly configured to support or not support MIMO communications configurations. In one embodiment, first and second MIMO communication paths are shared on the same optical fiber using frequency conversion to avoid interference issues, wherein the second communication path is provide to a remote extension unit to remote antenna unit. In another embodiment, the optical fiber-based distributed antenna systems may be configured to allow to provide MIMO communication configurations with existing components. Existing capacity of system components are employed to create second communication paths for MIMO configurations, thereby reducing overall capacity, but allowing avoidance of frequency conversion components and remote extension units.

A method and system for detecting whether an antenna is property connected to a distributed antenna network. The current drawn by the antenna is measured and compared against an expected current draw or reference level. The measured level of current drawn by the antenna is indicative of whether the antenna is properly connected or is disconnected. The comparison results may be used as the basis for creating a status message, which is then communicated to a central monitoring unit for each antenna. The central monitoring unit may generate appropriate alarms in response to a status message indicating a fault condition at a particular antenna.

The present invention provides a distributed antenna communications system and methods of implementing a distributed antenna communications system. In accordance with an embodiment of the invention, a distributed antenna system comprises: a base station configured for communication with a telecommunications network; a multi-port repeater hub connected to the base station to receive a communications signal from the base station and to distribute the communications signal to a plurality of ports of the multi-port repeater hub, the multi-port repeater hub comprising a scanner for scanning a plurality of frequency channels to identify one or more channels of the communications signal received from the base station; and a plurality of antenna units, each coupled to one of the ports of the multi-port repeater hub

An improved power control method and apparatus of a mobile terminal is provided for facilitating random access procedure in a mobile communication system based on a distributed antenna system. A method includes receiving, by the terminal, system information from a base station, the system information including transmit power information for transmitting a random access preamble; calculating a transmit power using the transmit power information; and transmitting the random access preamble using with the calculated transmit power.

Antenna apparatuses and related antenna units that include antenna selection based on orientation are disclosed. Related methods and distributed antenna systems are also disclosed. Antenna selection is provided between two or more antennas disposed in different polarization orientations according to orientation of the antenna unit in which the antennas are included. The antenna(s) oriented most closely to perpendicular to the ground in one embodiment may be selected for use in wireless communications with wireless client devices. In this manner, the antenna(s) employed in wireless communications is likely to be the closest in polarization to the polarization of wireless client device antennas. Otherwise, an unacceptable reduction in communications link quality with the wireless client devices may occur.

A distributed antenna system comprises a base transceiver station, a plurality of distributed antenna units and a signal routing apparatus. The base transceiver station has a plurality of output ports that generate a plurality of downlink signals having overlapping transmit frequencies and containing different communication content. The different communication content is directed toward each of a plurality of mobile units. The base transceiver station also has at least one uplink receive port that receives an uplink signal. The uplink signal includes communication content received from at least one of the mobile units. The plurality of distributed antenna units have coverage areas that are non-overlapping or only partially overlapping. The signal routing apparatus routes the downlink signals to the plurality of distributed antennas such that each of the plurality of downlink signals are transmitted by one or more of the distributed antennas and each distributed antenna only transmits one of the downlink signals.

A method of deploying a distributed antenna system (DAS) is provided. The method comprises outputting first and second signals from a multiple-input and multiple-output base station (MIMO BTS) and coupling a master unit to the MIMO BTS. The method further comprises coupling first and second remote units to the master unit, the first remote unit communicating the first signal over a first air interface located within the environment at a first location, the second remote unit communicating the second signal over a second air interface within the environment at a second location. The first and second remote units are arranged at the first and second locations within the environment and configured to provide signal coverage of both the first signal and the second signal at a third location in the environment to provide the capacity for MIMO communications through the system at the third location.

A system for data transport in a Distributed Antenna System (DAS) includes a plurality of remote Digital Access Units (DAUs) located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport digital signals between the plurality of remote DAUs. The system also includes a plurality of central hubs. Each of the plurality of central hubs is in communication with one of the remote DAUs using an electrical communications path. The system further includes a plurality of transmit / receive cells. Each of the plurality of transmit / receive cells includes a plurality of remote hubs. Each of the remote hubs in one of the plurality of transmit / receive cells is in communication with one of the plurality of central hubs using an optical communications path.

Aspects of the subject disclosure may include, for example, initiating first and second groups of communication sessions according to testing criteria where the first group of communication sessions is established via a local area wireless access technology utilizing the distributed antenna system and the second group of communication sessions is established via the second radio access technology utilizing the distributed antenna system, and measuring performance data for the first and second groups of communication sessions according to the testing criteria. Other embodiments are disclosed.

A system and method for dynamically optimizing the performance of indoor distributed antenna systems communicate to user equipment is disclosed. The user equipment measures information describing the downlink signals such as the downlink data rates, the quality of the received signal, and the location of the user equipment. A service module collects this information and determines an optimized power level for each of the antenna units. The service module may optimize only one antenna unit power level or a subset of the antenna units within the distributed antenna system in a preferred embodiment. One or more of the antenna units then transmits downlink signals with the optimized power levels. The optimized power level may be less than the initial power level in a preferred embodiment. As a result, the performance of the indoor distributed antenna systems is enhanced.

A system and method for enhancing the performance in heterogeneous wireless access networks employing a distributed antenna system is disclosed. A control unit comprises a distributed antenna system management server which collects load information from each of the carriers. The control unit further comprises a power management decision engine which determines the optimal downlink transmission power level for the carriers based on the collected load information and a set of parameters related to the power for the carriers. Power levels may decrease to baseline parameters when the load on carriers decreases.

A digital distributed antenna system (DDAS) that regains the capability to perform simulcast to multiple simulcast groups while using a base station's direct digital output is provided. The User Plane data is adapted for simulcast and also for eliminating time delay ambiguities across multiple simulcast digital radios. In addition, the Control and Management Plane is aggregated across multiple remote units to allow a non-modified donor digital base station to control simulcast groups. The result is a low cost digital DAS that can efficiently distribute the capacity of a digital base station to solve coverage and capacity requirements in a manner similar to that now accomplished using a traditional base station with RF in / out.

A distributed antenna system includes a master unit including a downlink RF input operable to receive an RF input signal from a downlink port of a base station, a first optical port, and a second optical port. The distributed antenna system also includes a first remote unit coupled to the first optical port. The first remote unit comprises a downlink antenna port and a first uplink antenna port and a second remote unit coupled to the second optical port of the master unit. The second remote unit comprises a downlink antenna port and a second uplink antenna port. The master unit is operable to transmit a first RF signal associated with the first RF uplink signal to a first uplink port of the base station and transmit a second RF signal associated with the second RF uplink signal to a second uplink port of the base station.

A distributed antenna system includes a master unit configured to receive at least one set of multiple input multiple output (MIMO) channel signals from at least one signal source. The master unit is configured to frequency convert at least one of the MIMO channel signals to a different frequency from an original frequency, and combine the MIMO channel signals for transmission. An optical link couples the master unit with a remote for transceiving the MIMO channel signals. The remote unit is configured to receive the MIMO channel signals to be transmitted over antennas and includes an extension port configured to transceive at least one of the MIMO channel signals. An extension unit is coupled to the remote unit and is configured to frequency convert at least one of the first and second MIMO channel signals from the different frequency back to an original frequency for transmission over an antenna.

A system is provided for adjusting power provided to a device. The system can include power sourcing equipment and a sub-system. The power sourcing equipment can provide power to a powered device via a channel. The sub-system can determine an amount by which to increase the power based on a resistance of the channel. The power sourcing equipment or the powered device can adjust the power (or load) responsive to a command from the sub-system. The sub-system can include a measurement device and a processor. The measurement device can measure an output voltage of the power sourcing equipment, an input voltage of the powered device, and a current on the channel. The processor can determine the resistance of the channel based on the output voltage, the input voltage, and the current. The processor can output a command specifying an increase or decrease in power supplied by the power sourcing equipment.

The present invention provides a distributed antenna communications system and methods of implementing a distributed antenna communications system. In accordance with an embodiment of the invention, a distributed antenna system comprises: a base station configured for communication with a telecommunications network; a multi-port repeater hub connected to the base station to receive a communications signal from the base station and to distribute the communications signal to a plurality of ports of the multi-port repeater hub, the multi-port repeater hub comprising a scanner for scanning a plurality of frequency channels to identify one or more channels of the communications signal received from the base station; and a plurality of antenna units, each coupled to one of the ports of the multi-port repeater hub.

The present disclosure is a novel utility of a software defined radio (SDR) based Distributed Antenna System (DAS) that is field reconfigurable and support multi-modulation schemes (modulation-independent), multi-carriers, multi-frequency bands and multi-channels. The present disclosure enables a high degree of flexibility to manage, control, enhance, facilitate the usage and performance of a distributed wireless network such as flexible simulcast, automatic traffic load-balancing, network and radio resource optimization, network calibration, autonomous / assisted commissioning, carrier pooling, automatic frequency selection, frequency carrier placement, traffic monitoring, traffic tagging, pilot beacon, etc. As a result, the SDR DAS can increase the efficiency and traffic capacity of the operators' wireless network.

A location detection system for locating a mobile device placing an emergency 911 call within a facility having a distributed antenna system. The location detection system includes one or more detection units located within the distributed antenna system and being associated with one or more antennas. Each detection unit monitors a dedicated emergency 911 channel for activity and alerts a monitor unit if activity is detected. The monitor unit determines the location of the antenna receiving the emergency 911 call based upon the identity of the detection unit.

A system and method for supporting wireless in-building communications uses a wireless local area network access point, a cellular distributed antenna system, and a cellular radio base station coupled to the cellular distributed antenna system. The cellular radio base station provides cellular communication service via the cellular distributed antenna system. A coupler couples the wireless local area network access point to the cellular distributed antenna system in reverse mode, such that the wireless local area network access point provides wireless local area network service via the cellular distributed antenna system.

There is provided a method comprising: determining a phase difference between at least two antenna units of a distributed antenna system on the basis of at least one pilot signal received from at least one of a plurality of antenna units; and transmitting phase correction commands to a common base station of the plurality of antenna units on the basis of the determined phase difference in order to synchronize carrier phases between at least two antenna units of the distributed antenna system.

A distributed antenna system is provided for communicating with a plurality of base stations. The distributed antenna system includes a system controller and a master unit communicating with at least one of the plurality of base stations. A remote unit communicates over a high data rate media with the master unit and / or a downstream remote unit. Alternatively, the distributed antenna system includes a controller and a digital time / space crosspoint switch controlled by the controller. A digitizing transceiver is in communication with the digital time / space crosspoint switch. The crosspoint switch is configured to transmit and receive digital data through the digitizing transceiver.

A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses signal samples resulting from analog to digital conversion of an analog signal received via an antenna. The RF unit transfers the compressed signal samples over the serial data link to the base station processor where they are decompressed prior to the normal signal processing operations. For the downlink, the base station processor compresses signal samples and transfers the compressed signal samples over the serial data link to the RF unit. The RF unit decompresses the compressed samples and converts the decompressed samples to an analog signal for transmission over an antenna. Compression and decompression can be incorporated into operations of conventional base stations and distributed antenna systems.

The invention discloses a processing method of non-periodic channel state information and a device and a system. The problem that the interval of non-periodic CSI (Channel State Information) from trigger to feedback is too short to allow the information to be effectively processed can be solved. The method comprises the following steps of: receiving high-level configuration information, wherein the high-level configuration signaling comprises one or more CSI-RS configuration signaling, and receiving one or more CSI-RS reference signals; according to the one or more CSI-RS configuration signaling, carrying out channel measurement of one or more CSI-RS reference signals, and obtaining measurement results; and determining K non-periodic CSI by using the results, and reporting the K non-periodic CSI on K different subframes, wherein K is an integer more than or equal to 2. The embodiment of the invention overcomes the problems that in COMP (Coordinated Multiple Points) technology or a distributed antenna system, the feedback time from trigger non-periodic CSI to actual CSI is too short to allow the information to be effectively processed.

Embodiments disclosed provide sectorization in distributed antenna systems, and related components and methods. The antenna units in the distributed antenna systems can be sectorized. In this regard, one or more radio bands distributed by the distributed antenna systems can be allocated to one or more sectors. The antenna units in the distributed antenna systems are also allocated to one or more sectors. In this manner, only radio frequency (RF) communications signals in the radio band(s) allocated to given sector(s) are distributed the antenna unit allocated to the same sector(s). The bandwidth capacity of the antenna unit is split among the radio band(s) allocated to sector(s) allocated to the antenna unit. The sectorization of the radio band(s) and the antenna units can be configured and / or altered based on capacity needs for given radio bands in antenna coverage areas provide by the antenna units.

An improved mechanism for routing communication traffic between a radio access network and distributed antenna system (DAS) remote antenna units. In accordance with an exemplary embodiment of the invention, a DAS hub and each DAS antenna unit served by the DAS hub will sit as a respective node on a packet-switched network. Further, the DAS hub will maintain or otherwise have access to a set of mapping data that correlates one or more radio access network coverage segments (e.g., cell sectors) with one or more DAS antenna unit addresses on the packet-switched network (e.g., IP addresses). Advantageously, an administrator of the DAS can then configure or alter the mapping data whenever desired, to conveniently set the RAN-DAS correlations and to thereby distribute RAN coverage in a desired manner throughout the DAS.