Patent application number | Description | Published |
20130176946 | HIGHLY DETECTABLE PILOT STRUCTURE - Aspects describe a Highly Detectable Pilot that allows a mobile device to detect more base stations and, thus, can provide more accuracy in location estimate. A highly detectable pilot can be transmitted in a portion of one or more data symbols that are not currently being utilized for transmission of data. Transmission of the highly detectable pilot in two data symbols provide a receiver with more convergence time, however, it can take the receiver a longer amount of time to acquire an adequate number of pilots for a location estimate. | 07-11-2013 |
20130176947 | HIGHLY DETECTABLE PILOT STRUCTURE - Aspects describe a Highly Detectable Pilot that allows a mobile device to detect more base stations and, thus, can provide more accuracy in location estimate. A highly detectable pilot can be transmitted in a position in one or more data symbols that are not currently being utilized for transmission of data. In certain aspects, a transmitter may not transmit during other positions of the one or more data symbols. Transmission of the highly detectable pilot in two data symbols provide a receiver with more convergence time, however, it can take the receiver a longer amount of time to acquire an adequate number of pilots for a location estimate. | 07-11-2013 |
20130182667 | HIGHLY DETECTABLE PILOT STRUCTURE - Aspects describe a Highly Detectable Pilot that allows a mobile device to detect more base stations and, thus, can provide more accuracy in location estimate. A highly detectable pilot can be transmitted in a portion of one or more data symbols that are not currently being utilized for transmission of data. Transmission of the highly detectable pilot in two data symbols provide a receiver with more convergence time, however, it can take the receiver a longer amount of time to acquire an adequate number of pilots for a location estimate. | 07-18-2013 |
20130182784 | HIGHLY DETECTABLE PILOT STRUCTURE - Aspects describe a Highly Detectable Pilot that allows a mobile device to detect more base stations and, thus, can provide more accuracy in location estimate. A highly detectable pilot can be transmitted in one or more data symbols that are not currently being utilized for transmission of data. Transmission of the highly detectable pilot in two data symbols provide a receiver with more convergence time, however, it can take the receiver a longer amount of time to acquire an adequate number of pilots for a location estimate. | 07-18-2013 |
20130219055 | METHOD AND APPARATUS FOR INTERFERENCE REPORTING IN A N-MIMO COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate interference measurement and reporting in a network multiple-in-multiple-out (N-MIMO) communication system. As described herein, a network device can measure and report interference corresponding to network nodes outside a designated set of nodes that can cooperatively serve the device. Respective interference reports can additionally identify dominant interfering nodes, correlation between transmit antennas of respective nodes, or the like. Subsequently, respective interference reports can be combined with per-node channel information to manage coordination and scheduling across respective network nodes. As further described herein, interference from a network node can be measured by observing reference and/or synchronization signals from the network node. To aid such observation, respective non-interfering network nodes can define null pilot intervals in which transmission is silenced or otherwise reduced. As additionally described herein, loading information broadcasted by respective interfering network nodes can be identified and utilized in connection with interference calculation. | 08-22-2013 |
20140011507 | System and Method to Enable Resource Partitioning in Wireless Networks - Systems and methodologies are described that facilitate improved resource partitioning and interference management in a wireless communication system. Techniques are described herein for the transmission and use of various types of signaling, such as Access Request commands, Reverse Link Special Resource Utilization Message (R-SRUM) signaling, Forward Link Special Resource Utilization Message (F-SRUM) signaling, and the like, for managing interference associated with range extension, restricted association networks, and other jamming scenarios. As described herein, downlink resource coordination and interference management are accomplished through the use of Access Request or R-SRUM signaling conducted in a unicast or broadcast fashion, and uplink resource coordination and interference management are accomplished through the use of F-SRUM signaling. As further described herein, a clean communication channel such as a Low Reuse Preamble (LRP) channel can be utilized for interference management signaling and/or leveraged for determining timing of various signaling messages. | 01-09-2014 |
20140016603 | DEDICATED REFERENCE SIGNAL DESIGN FOR NETWORK MIMO - Aspects describe utilizing a dedicated reference signal for supporting Network MIMO, distributed MIMO, Coordinated MultiPoint, and the like. A data modulation symbol is transmitting in the same direction as a pilot modulation symbol is transmitted. Two or more wireless devices can coordinate communications such that transmission of the same pilot modulation symbol and the same data modulation symbol are transmitted to a device in different directions, each direction associated with a wireless device and intended for a particular mobile device. Cluster-specific scrambling and/or user-group specific scrambling can be employed and a scrambling code can be communicated prior to transmission of the pilot modulation symbols and data modulation symbols. | 01-16-2014 |
20140071897 | Synchronizing a Base Station in a Wireless Communication System - A method for synchronizing a wireless communication system is disclosed. A silence duration for a base station is determined based on the time required for a neighbor base station to obtain or maintain synchronization. All transmissions from the base station are ceased for the silence duration. Multiple base stations level may cease transmissions at the same time, thus mitigating interference. | 03-13-2014 |
20140140239 | Method and Apparatus for Conducting Measurements when Multiple Carriers are Supported - Measurements are conducted on one or more carriers in a case where an access terminal supports reception on multiple carriers. Upon determining that an access terminal is capable of concurrently receiving on a given set of carriers, a measurement is conducted on one or more carriers of the set while receiving on or more other carriers of the set. Conversely, upon determining that an access terminal is not capable of concurrently receiving on a given set of carriers, a measurement is conducted on one or more carriers of the set while not receiving on or more other carriers of the set. In addition, data transfers to or from an access terminal on a carrier may be restricted (e.g., data transfers not scheduled or only low priority data transfers scheduled) during one or more subframes before or after the access terminal conducts a measurement on another carrier. | 05-22-2014 |
20140266909 | METHODS FOR LCI DISAMBIGUATION - Various arrangements for performing location disambiguation are presented. A mobile device may receive a plurality of location hypotheses. The mobile device may also receive an indication of a disambiguation evaluation technique selected from a plurality of disambiguation evaluation techniques. The mobile device may perform the disambiguation evaluation technique using the plurality of location hypotheses. Using the disambiguation evaluation technique, a location hypothesis of the plurality of location hypotheses may be selected by the mobile device as corresponding to the mobile device's location. | 09-18-2014 |
20140323161 | ADAPTIVE PASSIVE SCANNING AND/OR ACTIVE PROBING TECHNIQUES FOR MOBILE DEVICE POSITIONING - Various methods, apparatuses and/or articles of manufacture are provided which may be implemented to support mobile device positioning through the use of adaptive passive scanning and/or adaptive active probing techniques. For example, a mobile device may acquire signals from wireless transceivers, identify wireless transceivers based, at least in part, on the acquired signal(s), determine a received signal strength measurement for each of the wireless transceivers based, at least in part, on the acquired signal(s), and determine a transmission power of a probe signal to be transmitted to at least one of the wireless transceivers based, at least in part, on at least one of the received signal strength measurements. | 10-30-2014 |
20140328314 | Power Decision Pilot for Wireless Communication - Techniques for transmitting power decision pilots are described. A transmitter (e.g., a base station or a UE) may transmit a power decision pilot to indicate a transmit power level that it will use on subsequent time-frequency resources. In one design, the transmitter may determine a set of time-frequency resources to use for transmitting the power decision pilot, determine the transmit power level for the power decision pilot based on the transmit power level to use for data transmission, and transmit the power decision pilot on the set of time-frequency resources to indicate the transmit power level to use for data transmission on the subsequent time-frequency resources. A receiver (e.g., a UE or a base station) may receive power decision pilots from a set of transmitters and may estimate channel quality that the receiver can expect on the subsequent time-frequency resources based on the power decision pilots. | 11-06-2014 |
20140334415 | SHORT-TERM INTERFERENCE MITIGATION IN A WIRELESS COMMUNICATION SYSTEM - Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a serving base station may send a message to a terminal to trigger short-term interference mitigation. In response, the terminal may send a message to request at least one interfering base station to reduce interference on at least one resource. Each interfering base station may determine a transmit power level to be used for the at least one resource and may send a pilot at this transmit power level. The terminal may estimate the channel quality of the at least one resource based on at least one pilot received from the at least one interfering base station. The terminal may send information indicative of the estimated channel quality to the serving base station. The serving base station may send a data transmission on the at least one resource to the terminal. | 11-13-2014 |
20140370875 | CONFIGURING AN IDENTIFIER FOR AN ACCESS POINT - An access point is configured based on acquired information. An access point may be configured based on the configuration(s) of at least one other access point. An identifier to be transmitted by an access point may be selected based on the identifier(s) transmitted by at least one other access point. An access point may configure itself with assistance from a configuration server. For example, the access point may send information such as the location of the access point to a configuration server and the configuration server may respond with a list of neighboring access points for that access point. A configuration server may provide configuration information to an access point based on the location of the access point. A configuration server also may direct an access point to a different configuration server. | 12-18-2014 |
20140376518 | CODE DIVISION MULTIPLEXING IN A SINGLE-CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA (LFDMA), a transmitter generates modulation symbols for different types of data (e.g., traffic data, signaling, and pilot) and performs code division multiplexing (CDM) on at least one data type. For example, the transmitter may apply CDM on signaling and/or pilot sent on frequency subbands and symbol periods that are also used by at least one other transmitter. To apply CDM to a given data type (e.g., signaling), the transmitter performs spreading on the modulation symbols for that data type with an assigned spreading code. CDM may be applied across symbols, samples, samples and symbols, frequency subbands, and so on. The transmitter may perform scrambling after the spreading. The transmitter generates SC-FDMA symbols of the same or different symbol durations for traffic data, signaling, and pilot and transmits the SC-FDMA symbols. | 12-25-2014 |
20150023296 | TIMING ADJUSTMENT FOR SYNCHRONOUS OPERATION IN A WIRELESS NETWORK - Techniques for adjusting transmit timing of base stations and user equipments (UEs) in a wireless network are described. In one operating scenario, a femto base station communicates with a femto UE, and a macro base station communicates with a macro UE located within the coverage of the femto base station. In an aspect, the transmit timing of the femto base station may be delayed relative to the transmit timing of the macro base station, e.g., to time align downlink signals from the femto and macro base stations at the femto and macro UEs. In another aspect, the transmit timing of the femto UE may be advanced relative to the transmit timing of femto base station by an amount larger than twice the propagation delay between the femto UE and the femto base station, e.g., to time align uplink signals from the femto and macro UEs at the femto base station. | 01-22-2015 |
20150024772 | METHOD AND APPARATUS FOR DETERMINING WHETHER OR NOT A MOBILE DEVICE IS INDOORS - The disclosure is directed to determining whether or not a mobile device is indoors. The mobile device obtains a position fix based, at least in part, on an outdoor positioning system, and obtains one or more shape-files for one or more objects that are in proximity of the position fix. | 01-22-2015 |
20150055492 | SYSTEM AND METHOD FOR SELECTING A WI-FI ACCESS POINT FOR POSITION DETERMNATION - Methods, systems, computer-readable media, and apparatuses for position determination are presented. In some embodiments, a method for position determination includes selecting at least one of a plurality of access points based on a measure of response time variability associated with the at least one access point. The method further includes sending, from a device, a communication to the selected at least one access point. The method also includes receiving, from the selected at least one access point, a response to the communication. The method additionally includes calculating a distance from the device to the selected at least one access point based on a round trip time associated with the response to the communication. | 02-26-2015 |
20150055545 | Techniques for Supporting Relay Operation in Wireless Communication Systems - Techniques for supporting operation of relay stations in wireless communication systems are described. In an aspect, a bitmap may be sent by a base station and/or a relay station to identify subframes of at least two types in multiple radio frames. For example, the bitmap may indicate whether each subframe covered by the bitmap is of a first type or a second type. UEs may use the bitmap to control their operation. For example, a UE may perform channel estimation or measurement for the subframes of the first type and may skip channel estimation and measurement for the subframes of the second type. In another aspect, a base station may transmit data and/or control information on resources not used by a relay station to transmit a reference signal. This may avoid interference to the reference signal from the relay station, which may improve performance for UEs communicating with the relay station. | 02-26-2015 |
20150055613 | METHODS AND APPARATUS FOR ADJACENT CHANNEL INTERFERENCE MITIGATION IN ACCESS POINT BASE STATIONS - Apparatus and methods for interference mitigation in wireless communication networks are described. In one implementation, at a node in a first network, a power level and/or bandwidth or channelization of an adjacent channel signal may be determined, and a power level and/or bandwidth of a transmitted signal in the first network may be adjusted in response. | 02-26-2015 |
20150087238 | METHOD AND APPARATUS FOR ENHANCING ACCESS POINT DATABASES - An estimated location of an access point is generated based on identification of indoor and outdoor locations and the presumption that most access points are in an indoor location. The estimated location may be produced using location information for the access point and the identification of the indoor and outdoor locations while prioritizing the indoor location to produce the estimated location on or within a boundary of the indoor location. The location information may be, e.g., a preliminary estimated location or wireless signal measurements and associated position fixes for the access point. For example, a preliminary estimated location may be shifted to be on or within the nearest boundary of an indoor location or may be adjusted based on the location information. The estimated location may be calculated directly using weights to bias the calculation of the estimated location to be on or within the boundary of the indoor location. | 03-26-2015 |