693 results about "Distributed antenna system" patented technology

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.

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.

The present invention relates to radio frequency (RF) distribution systems for mobile communications. In particular, the present invention relates to a radio frequency network facilitating radio communication where the usual free space propagation of electromagnetic waves is hampered, undesired or impossible, for example in tunnels, mines, and buildings and in large complexes like exhibition grounds, shopping malls, and airports. The radio frequency network comprises a distributed antenna system having radiating elements, a wired distribution system feeding the distributed antenna system, at least one antenna amplifier between one end of the wired distribution system and the distributed antenna system, at least one line amplifier at the other end of the wired distribution system, and automatic self-leveling units included in the antenna and line amplifiers.

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 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.

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.

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.

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. More specifically, the present invention relates to a DAS utilizing one or more Daisy-Chained Rings of Remote Units. The present invention 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, a DAS in accordance with the present invention can increase the efficiency and traffic capacity of the operators' wireless network.

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.

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.