Patent application number | Description | Published |
20100211690 | BLOCK PARTITIONING FOR A DATA STREAM - A method for serving a data stream from a transmitter to a receiver includes: determining an underlying structure of the data stream; determining at least one objective, selected from a group of (1) reducing a start-up delay between when the receiver first starts receiving the data stream from the transmitter and when the receiver can start consumption of blocks of the data stream without interruption, according to the underlying structure, (2) reducing a transmission bandwidth needed to send the data stream, and (3) ensuring that the blocks of the data stream satisfy predetermined block constraints; and transmitting the blocks of the data stream consistent with the at least one objective and the underlying structure. | 08-19-2010 |
20110172916 | Mobile Device Positioning In A Constrained Environment - The subject matter disclosed herein relates to systems, methods, devices, articles, apparatuses, means, etc. for mobile device positioning in a constrained environment. For certain example implementations, a method may comprise obtaining an estimated velocity distribution and an estimated direction of movement distribution of a mobile device for a current position based at least in part on routability information for a constrained environment. A subsequent position of the mobile device may be estimated based at least in part on the estimated velocity distribution and the estimated direction of movement distribution for the current position. Other example implementations are described herein. | 07-14-2011 |
20110177809 | AFFECTING A NAVIGATION FUNCTION IN RESPONSE TO A PERCEIVED TRANSITION FROM ONE ENVIRONMENT TO ANOTHER - Techniques are provided that may be implemented in various methods and apparatuses to allow an electronic device to determine when it is transitioning or has transitioned from a first environment to a second environment based, at least in part, on at least one measured parameter. The measured parameter may be based, at least in part, on one or more received wireless signals associated with one or more wireless signal transmitters, and/or one or more signals associated with one or more non-radio sensors. The electronic device may then affect operation of a navigation function (e.g., having a trajectory estimation filter) based, at least in part, on the measured parameter. | 07-21-2011 |
20110178705 | Using Filtering With Mobile Device Positioning In A Constrained Environment - The subject matter disclosed herein relates to systems, methods, apparatuses, devices, articles, and means for using filtering with mobile device positioning in a constrained environment. For certain example implementations, a method may comprise obtaining at least one position measurement of a mobile device and filtering the at least one position measurement to produce at least one filtered position of the mobile device. The at least one filtered position may be adjusted based at least in part on mapping information to produce at least one adjusted position of the mobile device, with the mapping information pertaining to a constrained environment that corresponds to at least a portion of an interior of a building structure. Other example implementations are described herein. | 07-21-2011 |
20110231519 | ENHANCED BLOCK-REQUEST STREAMING USING URL TEMPLATES AND CONSTRUCTION RULES - A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server, which might include a cache. A client device can be adapted to take advantage of the ingestion process as well as improvements that make for a better presentation independent of the ingestion process. The client devices and ingestion system can be coordinated to have a predefined mapping and template for making block requests to HTTP file names that a conventional file server can accept through the use of URL construction rules. Segment size might be specified in an approximate manner for more efficient organization. | 09-22-2011 |
20110231569 | ENHANCED BLOCK-REQUEST STREAMING USING BLOCK PARTITIONING OR REQUEST CONTROLS FOR IMPROVED CLIENT-SIDE HANDLING - A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server. A client device can be adapted to take advantage of the ingestion process. The client device might be configured to optimize use of resources, given the information available to it from the ingestion system. This may include configurations to determine the sequence, timing and construction of block requests based on monitoring buffer size and rate of change of buffer size, use of variable sized requests, mapping of block requests to underlying transport connections, flexible pipelining of requests, and/or use of whole file requests based on statistical considerations. | 09-22-2011 |
20110238789 | ENHANCED BLOCK-REQUEST STREAMING SYSTEM USING SIGNALING OR BLOCK CREATION - A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server. The system might include controlling the sequence, timing and construction of block requests, time based indexing, variable block sizing, optimal block partitioning, control of random access point placement, including across multiple presentation versions, dynamically updating presentation data, and/or efficiently presenting live content and time shifting. | 09-29-2011 |
20110239078 | ENHANCED BLOCK-REQUEST STREAMING USING COOPERATIVE PARALLEL HTTP AND FORWARD ERROR CORRECTION - A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server, which might or might not include a cache. A client device can be adapted to take advantage of the ingestion process as well as including improvements that make for a better presentation independent of the ingestion process. In the block-request streaming system, the an ingestion system generates data according to erasure codes and the client device, through various selection and timing of requests for media data and redundant data, can efficiently decode media to provide for presentations. | 09-29-2011 |
20120131223 | Object-Based Transport Protocol - Methods and apparatuses are provided that facilitate providing an object-based transport protocol that allows transmission of arbitrarily sized objects over a network protocol layer. The object-based transport protocol can also provide association of metadata with the objects to control communication thereof, and/or communication of response objects. Moreover, the object-based transport protocol can maintain sessions with remote network nodes that can include multiple channels, which can be updated over time to seamlessly provide mobility, increased data rates, and/or the like. In addition, properties can be modified remotely by network nodes receiving objects related to the properties. | 05-24-2012 |
20120210190 | ENCODING AND DECODING USING ELASTIC CODES WITH FLEXIBLE SOURCE BLOCK MAPPING - Data can be encoded by assigning source symbols to base blocks, assigning base blocks to source blocks and encoding each source block into encoding symbols, where at least one pair of source blocks is such they have at least one base block in common with both source blocks of the pair and at least one base block not in common with the other source block of the pair. The encoding of a source block can be independent of content of other source blocks. Decoding to recover all of a desired set of the original source symbols can be done from a set of encoding symbols from a plurality of source blocks wherein the amount of encoding symbols from the first source block is less than the amount of source data in the first source block and likewise for the second source block. | 08-16-2012 |
20120265897 | METHODS AND APPARATUS FOR ENHANCING DEVICE PERFORMANCE THROUGH FLOW CONTROL - A method and apparatus for enhancing device performance through transport flow control is provided. The method may include determining that a level of user interest is indicated in at least one application of one or more applications, and modifying a transport flow associated with at least one of the one or more applications. | 10-18-2012 |
20130007223 | ENHANCED BLOCK-REQUEST STREAMING SYSTEM FOR HANDLING LOW-LATENCY STREAMING - A block-request streaming system provides for low-latency streaming of a media presentation. A plurality of media segments are generated according to an encoding protocol. Each media segment includes a random access point. A plurality of media fragments are encoded according to the same protocol. The media segments are aggregated from a plurality of media fragments. | 01-03-2013 |
20130191019 | METHODS AND APPARATUSES FOR USE IN MOBILE DEVICE STATE/TRAJECTORY ESTIMATION WITHIN AN INDOOR ENVIRONMENT - Various techniques are provided which may be implemented in one or more methods, apparatuses, and/or articles of manufacture for use with and/or in a mobile device to obtain this date/trajectory estimation us within an indoor environment. In an example, a mobile device may apply a motion model to propagate an estimated state of the mobile device from a first state corresponding to a first location of an electronic map representing an indoor environment to a second state corresponding to a second location of the electronic map, based, at least in part, on one or more sensed parameters. The mobile device may further validate the estimated state as propagated in response to a determination that a trajectory from the first location to the second location crosses a transition feature of a barrier presented by at least one obstacle identified in the electronic map. | 07-25-2013 |
20130196681 | COMPENSATING FOR USER OCCLUSION IN WI-FI POSITIONING USING MOBILE DEVICE ORIENTATION - Techniques for determining the position of a mobile wireless device are provided. The techniques include a method for determining the position of a mobile wireless device that includes receiving signal characteristics of a signal received from the mobile wireless device at a wireless access point of a Wireless Local Area Network (WLAN), determining an orientation of the mobile wireless device relative to the wireless access point, determining a compensation factor based on the orientation of the mobile wireless device relative to the wireless access point, and determining an estimated position of the mobile wireless device based at least in part on the compensation factor. The compensation factor compensates for the effect of user occlusion on at least one characteristic of the signal received from the mobile wireless device. | 08-01-2013 |
20130267178 | TECHNIQUES FOR PROCESSING PERCEIVED ROUTABILITY CONSTRAINTS THAT MAY OR MAY NOT AFFECT MOVEMENT OF A MOBILE DEVICE WITHIN AN INDOOR ENVIRONMENT - Techniques are provided which may be implemented using various methods, apparatuses and/or articles of manufacture to provide or otherwise support mobile device positioning. The mobile device positioning may be based, at least in part, on one or more perceived routability constraints that may or may not affect actual movement of a mobile device within an indoor environment. | 10-10-2013 |
20130268232 | Informative Display for Statistical Positioning System - System and method for providing informative display for statistical positioning system are disclosed. In one embodiment, the method includes receiving a statistical distribution of user locations in an area, where the statistical distribution of user locations includes a plurality of points representing likelihood of a user at corresponding locations, generating a weighted statistical distribution of user locations using an inverse distance weighting function, determining one or more estimated locations of the user using the weighted statistical distribution, and displaying the one or more estimated locations of the user, or a representation of the weighted statistical distribution of user position in a display. | 10-10-2013 |
20130295952 | ADAPTIVE UPDATING OF INDOOR NAVIGATION ASSISTANCE DATA FOR USE BY A MOBILE DEVICE - Various methods, apparatuses and articles of manufacture may be implemented for use in one or more computing platforms to adaptively provide and/or obtain indoor navigation assistance data (INAD) update(s) for use by a mobile device. An INAD update may, for example, comprise a subset of INAD available for an indoor environment. Such a subset may be determined based, at least in part, on a bounded region in an electronic map of the indoor environment. Such a bounded region may, for example, have a shape and/or a size based, at least in part, on at least one parameter indicative of a motion state of the mobile device. | 11-07-2013 |
20130335273 | COLLABORATIVE NAVIGATION TECHNIQUES FOR MOBILE DEVICES - Various methods, apparatuses and/or articles of manufacture are provided which may be implemented to perform and/or otherwise support collaborative navigation between a plurality of mobile devices. In one example, a first mobile device, in response to a determination that at least a second mobile device is located within a threshold distance of the first mobile device, may obtain a navigation parameter indicative of an initial position and/or movement of the second mobile device which was determined based, at least in part, on a measurement from a sensor at the second mobile device. The first mobile device then affect a determined position and/or movement of the first mobile device based, at least in part, on the navigation parameter. | 12-19-2013 |
20140080515 | SYSTEM AND/OR METHOD FOR PEDESTRIAN NAVIGATION - Disclosed are methods, apparatuses and systems for tracking a location of a mobile device based, at least in part, on measurements over time. In response to measurements, particles in a motion model may be propagated in a first routing graph covering an area. Propagated particles may be indicative of a direction of movement along a second routing graph covering the same area or a larger area in some embodiments. | 03-20-2014 |
20140114561 | MAP-ASSISTED SENSOR-BASED POSITIONING OF MOBILE DEVICES - Various methods, apparatuses and/or articles of manufacture are provided which may be implemented to estimate a trajectory of a mobile device within an indoor environment. In some embodiments, the trajectory may be estimated without the use of any signal-based positioning information. For example, a mobile device may estimate such a trajectory based, at least in part, on one or more sensor measurements obtained at the mobile device, and further affect the estimated trajectory based, at least in part, on one or more objects identified in an electronic map of the indoor environment. | 04-24-2014 |
20140129175 | MAP-BASED ADAPTIVE SAMPLING OF ORIENTATION SENSORS FOR POSITIONING - Techniques are provided for adaptively sampling orientation sensors in positioning systems based on location (e.g., map) data. Embodiments can enable a device to use location, direction, and/or location information to anticipate an expected change in motion. The embodiments can then identify and prioritize a number of sampling strategies to alter sampling rates of orientation sensors, and implement at least one strategy, based on priority. | 05-08-2014 |
20140180621 | SWING COMPENSATION IN STEP DETECTION - Step detection accuracy in mobile devices is increased by determining whether swinging is taking place. According to the invention, swinging can be detected using threshold detection, Eigen analysis, hybrid frequency analysis, and/or gyroscope-based analysis, for example. The determination that swinging is (or may be) occurring can impact how the mobile device reports detected steps for step detection. A count of missteps and/or a level of certainty, based on swing detection, can be provided with a step count. | 06-26-2014 |
20140180627 | SYSTEM, METHOD AND/OR DEVICES FOR APPLYING MAGNETIC SIGNATURES FOR POSITIONING - Disclosed are systems, methods and devices for application of measurements obtained from a compass or magnetometer in estimating a location of a mobile device. In specific implementations, expected signatures of local magnetic fields at locations are provided to a mobile device as positioning assistance data. In other implementations, magnetic measurements obtained by multiple mobile devices at identifiable locations in an indoor area may be combined for deriving expected signatures of local magnetic fields for use in positioning assistance data. | 06-26-2014 |
20140187258 | CONTEXT-BASED PARAMETER MAPS FOR POSITION DETERMINATION - In one implementation, a method may comprise: storing a user profile indicative of at least one attribute of a user of a mobile station; determining a measurement value based, at least in part, on a signal from at least one sensor on the mobile station; and estimating a location of the mobile station based, at least in part, on an association of the at least one attribute and the measurement value with a context parameter map database. | 07-03-2014 |
20140257766 | ADAPTIVE PROBABILISTIC STEP DETECTION FOR PEDESTRIAN POSITIONING - Performance of step detectors in mobile devices can be enhanced by calculating the probability of a step and providing the probability to an application. Adaptive data models can also be used that can be based on different types of motion (walking with mobile device in hand, climbing stairs with mobile device in purse, running with mobile device in pocket, etc.), and can adapt to a particular user's motion. Where applications allow, embodiments can further utilize data modeling to detect a pattern (e.g., a series of steps) and adjust the probability calculation accordingly. | 09-11-2014 |
20140266916 | METHOD AND APPARATUS FOR DETERMINING LOCATIONS OF ACCESS POINTS - Methods and apparatuses for determining locations of a plurality of access points (APs) are presented. In some embodiments, the method includes obtaining measurements from at least 3 measurement points using a mobile device, wherein the locations of the at least 3 measurement points are unknown and are at different locations. The method may also include computing distance measurements from the mobile device to each of the plurality of APs, at each of the at least 3 measurement points, using the measurements, computing a set of mutual distance values in a matrix of mutual distances between each of the plurality of APs, using the distance measurements, and determining the locations of the plurality of APs using the computed matrix of mutual distances, relative to the at least 3 measurement points. | 09-18-2014 |
20140365127 | Modeling Characteristics of a Venue - Methods and apparatuses for modeling characteristics of a venue are disclosed. The method comprises identifying a set of constraints associated with the venue, determining a plurality of paths to be traveled by one or more mobile devices in accordance with the set of constraints, directing the one or more mobile devices to navigate the venue using the plurality of paths, receiving data collected by the one or more mobile devices, and generating a model of the venue using the data collected by the one or more mobile devices. | 12-11-2014 |
20150148057 | MOTION STATE BASED MOBILE DEVICE POSITIONING - Various techniques are provided which may be implemented as methods, apparatuses and articles of manufacture for use by a mobile device or one or more computing devices to provide for or otherwise support motion state based mobile device positioning. In an example, a method may be implemented at a mobile device to identify two or more subsets of grid points corresponding to an electronic map representing a particular environment, select one of the two or more subsets of grid points for use in position estimation based, at least in part, on a motion state of the mobile device, and determine an estimated position of the mobile device based, at least in part, on the selected subset of grid points. | 05-28-2015 |
20150163641 | TECHNIQUES FOR PROCESSING PERCEIVED ROUTABILITY CONSTRAINTS THAT MAY OR MAY NOT AFFECT MOVEMENT OF A MOBILE DEVICE WITHIN AN INDOOR ENVIRONMENT - Techniques are provided which may be implemented using various methods, apparatuses and/or articles of manufacture to provide or otherwise support mobile device positioning. The mobile device positioning may be based, at least in part, on one or more perceived routability constraints that may or may not affect actual movement of a mobile device within an indoor environment. | 06-11-2015 |
20150215731 | METHOD AND APPARATUS FOR HIERARCHICAL MAP TILING - A method for processing assistance data associated with positioning of a mobile device as described herein includes estimating an initial location of the mobile device within an area; designating the initial location of the mobile device as a focal point; retrieving a subset of hierarchical assistance data as a function of the focal point; and generating a multi-level assistance data structure for the area centered at the focal point. | 07-30-2015 |
20150215740 | Context-Based Parameter Maps for Position Determination - In one implementation, a method may comprise: storing a user profile indicative of at least one attribute of a user of a mobile station; determining a measurement value based, at least in part, on a signal from at least one sensor on the mobile station; and estimating a location of the mobile station based, at least in part, on an association of the at least one attribute and the measurement value with a context parameter map database. | 07-30-2015 |
20150226573 | PEDOMETER INTEGRATED PEDESTRIAN POSITIONING - An estimated position of a pedestrian is obtained by detecting, by a movement sensor on the pedestrian, whether the pedestrian is moving, propagating particles based on a predictive pedestrian movement model upon detecting that the pedestrian is moving, and updating, by a wireless network, the position of the pedestrian upon failure by the movement sensor to detect that the pedestrian is moving. The movement sensor may be a pedometer. The wireless network may be a local wireless network such as a Wi-Fi network. | 08-13-2015 |
20150228095 | Method and apparatus for generating a heatmap - Systems, apparatus and methods for generating a heatmap are presented. A first floor plan is received. A device detects stair lines in the first floor plan and reduces the stair lines from the first floor plan to form a second floor plan. A heatmap is generated based on the second floor plan. The device includes a transceiver to receive the first floor plan and a processor, coupled to the transceiver, to detect stair lines in the first floor plan, reduce the stair lines in the first floor plan to form a second floor plan, and generate the heatmap from the second floor plan. | 08-13-2015 |
20150296479 | SYSTEMS, APPARATUS, AND METHODS FOR LOCATION ESTIMATION OF A MOBILE DEVICE - Systems, apparatus, and methods for estimating the location of a wireless device include determining the location estimate based on accessible access points and without using a received signal strength indicator. In some embodiments, the location estimate is determined based on a center of mass of the accessible access points, a closest accessible access point, a center of mass of N access points, an average angle of the accessible access points, or a Parzen density of accessible access point distributions. | 10-15-2015 |
20150316576 | MOTION DIRECTION DETERMINATION AND APPLICATION - This disclosure provides devices, computer programs and methods for determining a motion direction. In one aspect, a mobile device includes one or more sensors configured to measure acceleration data in each of one or more directions. The mobile device also includes one or more processors and a memory storing instructions that, when executed by the one or more processors, implement a motion direction estimation module. The motion direction estimation module is configured to identify a use case for the mobile device based at least in part on the acceleration data. The motion direction estimation module also is configured to select a set of one or more parameters based on the identified use case. The motion direction estimation module is further configured to calculate an estimated motion direction of the mobile device based on the acceleration data and the respective set of parameters corresponding to the identified use case. | 11-05-2015 |
20150316577 | MOTION DIRECTION DETERMINATION AND APPLICATION - This disclosure provides devices, computer programs and methods for determining a motion direction. In one aspect, a mobile device includes sensors for measuring acceleration data. The mobile device also includes a processor and memory that implement a plurality of motion direction estimation modules for calculating a plurality of respective motion directions. Each of the motion direction estimation modules uses a respective set of parameters and calculates the respective motion direction based on the acceleration data and the respective set of parameters. The modules also include a plurality of reliability metric computation modules for determining a plurality of respective reliability metrics for the respective estimated motion directions. The modules also include a selection module for identifying the reliability metric that indicates the greatest reliability, identifying the corresponding motion direction, and generating a resultant motion direction. In some implementations, the selection module selects the identified motion direction as the resultant motion direction. | 11-05-2015 |
20150316578 | MOTION DIRECTION DETERMINATION AND APPLICATION - This disclosure provides devices, computer programs and methods for determining a motion direction. In one aspect, a mobile device includes sensors for measuring acceleration data. The mobile device also includes a processor and a memory that implement a motion direction estimation module configured to determine a primary axis of motion. The motion direction estimation module also determines a motion direction along the primary axis. The determination includes fitting the acceleration data, or data derived therefrom, to a bimodal distribution. A first peak of the bimodal distribution corresponds to a first motion direction along the primary axis, and a second peak corresponds to a second motion direction opposite the first. The motion direction estimation module is configured to estimate the motion direction based on the bimodal distribution. In some implementations, the motion direction estimation module selects the motion direction corresponding to the higher of the peaks as the estimated motion direction. | 11-05-2015 |
20150316579 | MOTION DIRECTION DETERMINATION AND APPLICATION - This disclosure provides devices, computer programs, and methods for estimating reliability metrics. In one aspect, a mobile device includes sensors for measuring acceleration data, a processor, and a memory storing instructions that implement a plurality of modules. The modules include a motion direction estimation module for estimating a motion direction based on the acceleration data. The modules also include a reliability metric computation module for estimating reliability metrics. For example, the reliability metric computation module can estimate a first reliability metric based on a process used to estimate the motion direction, a second reliability metric based on a measure of stability of the device, and a third reliability metric based on a measure of consistency in the estimated motion direction over a period. The reliability metric computation module calculates a composite reliability metric that indicates a measure of certainty in the estimated motion direction based on the estimated reliability metrics. | 11-05-2015 |
20150350832 | APPARATUS AND METHOD OF REFINING AN ESTIMATED POSITION IN A WIRELESS NETWORK - The position of a mobile device in a wireless network is refined by obtaining statistical samples of particles representing an initial estimated position of the device, obtaining one or more parameters of received signals from a set of one or more access points in the network, locking the set of one or more access points without using one or more additional access points to estimate the position, resampling the particles to obtain a second estimation of the position after locking the first set of one or more access points, and obtaining a refined estimated position based on a comparison of the first and second estimations of the position. | 12-03-2015 |
20150354969 | MOBILE DEVICE POSITION UNCERTAINTY BASED ON A MEASURE OF POTENTIAL HINDRANCE OF AN ESTIMATED TRAJECTORY - Various techniques are provided for identifying a position uncertainty of a mobile device, such as, based, at least in part, on a measure of potential hindrance of an estimated trajectory. For example, an example method may comprise estimating a trajectory of the mobile device within a particular environment, determining a measure of potential hindrance for at least a portion of the trajectory based, at least in part, on an electronic map that is indicative of a presence or an absence of one or more obstacles, and presenting an indication of a position uncertainty to a user of the mobile device. The position uncertainty may be based, at least in part, on the measure of potential hindrance. | 12-10-2015 |
20160066157 | METHOD AND APPARATUS FOR REAL-TIME, MOBILE-BASED POSITIONING ACCORDING TO SENSOR AND RADIO FREQUENCY MEASUREMENTS - Method, hardware, device, computer program, and apparatus for positioning mobile devices in unmapped locations based on motion sensor and radio frequency measurements are described. A reference radio signal is received from a transmitter with an unknown absolute position and a reference range measurement is calculated. Mobile device motion sensor data is used to estimate a relative position of the mobile device. A sample radio signal is received from a transmitter with an unknown absolute position and a sample range measurement is calculated. The reference range measurement and the sample range measurement are compared. The estimated motion sensor based position is adjusted according to the result of the comparison. | 03-03-2016 |
20160088440 | MOBILE DEVICE SENSOR AND RADIO FREQUENCY REPORTING TECHNIQUES - Method, mobile device, computer program product, and apparatus for optimizing sensor reporting are described. A mobile device can measure radio frequency (RF) signal characteristics while receiving data from one or more mobile device sensors. The mobile device may determine its relative displacement between RF signal measurements. The mobile device can send a representation of the RF signal characteristics and the displacement data to one or more servers. The representation displacement data may include one or more reliability characteristics and/or a displacement reliability rating. A server can obtain the displacement data and RF signal characteristics to determine positioning of wireless transmitters in an environment and build a positioning database. | 03-24-2016 |