501 results about "Wireless signal strength" patented technology

Devices, systems and methods are disclosed for additional security, functionality, and convenience in the operation of a wireless communication device with the use of a separate proximity security token in communication with the wireless communication device. In exemplary embodiments, the token is carried by the user while device logic is installed on the user's wireless communication device. The device logic along with transceivers allows the device to sense proximity of the token through wireless communication. Given a certain range of the proximity security token, as determined by the wireless signal strength, the device logic determines whether the device is in a locked or unlocked state. If the proximity security token is outside the range, then the device is locked. The proximity security token uses ultra low power communications for optimal battery life.

A mobile device, for determining location in a wireless network, includes a motion detector for detecting motion of the mobile device; a memory for storing wireless signal strength calibration data comprising a list of wireless signal strengths and known locations; a location detection module for measuring a wireless signal strength of any received network radio signals and for determining the location of the mobile device with reference to the wireless signal strength calibration data; and a location correction module, for applying a statistical correction to the measured wireless signal strength determined by the location detection module when the motion detector detects that the mobile device is moving less than a threshold amount. The mobile device may further include an orientation detector for detecting the orientation of the mobile device, which can be compared with orientation data stored in the calibration data.

A system and method for mapping an indoor environment. A client device may receive an indication of a starting point on a floor plan. The client device may prompt the user to travel in a particular direction and indicate when the user can no longer travel in that direction. As the user travels from the starting point in the designated direction, the client device may gather information about the indoor environment. For example, the client device may gather wireless signal strength data, cellular tower strength data, or video image data while the user travels in the designated direction. The client device may associate the gathered information with the path the user traveled from the starting point to the ending point. The client device may indicate the area for which valid location information is available based on the path the user traveled and the information the user collected.

The invention discloses a wireless fidelity (WIFI) based layered positioning system and an implementing method. The system comprises a receiving interface, a judging module, a positioning module and a display module. The implementing method of the system includes firstly, acquiring wireless signal intensities and a media access control (MAC) address of an access point (AP); secondly, judging a storey where a mobile terminal user is located; thirdly, positioning the mobile terminal user; and fourthly, displaying a specific position of the mobile terminal user on the storey. According to the WIFI based layered positioning system and the implementing method, indoor layered mobile terminal users can be timely and accurately positioned, reference points are expanded by means of participation of the users, costs are saved, and simultaneously, accuracy of positioning can be guaranteed.

The present invention belongs to node self-localization field in large-scale wireless sensor network, and discloses a node indoor localization method based on wireless signal intensity, which main includes: getting relationship curve of signal intensity and distance, and putting forward concept of effective wireless signal intensity (Effective RSS, ERSS); obtaining coordinates of target node by selecting localization arithmetic (ERSS filter + maximum likelihood estimation, triangle localization, approximate location estimation) according with anchor point amount through distance between anchor point and target by training RSS curve; providing alerting service by using physics coordinate, providing navigation service according with route arithmetic and address chain by using sign coordinate (for example in hall). Precisely localization of indoor target can be realized in condition of low-cost, simple initial configuration, and a plurality of services based on location can also be provided.

A mobile telephone may aid a user in locating a lost wireless headset. The mobile telephone may include a processor and a user interface. The processor may receive data indicative of a quality (e.g., wireless signal strength) related to a proximity between the mobile telephone and the wireless headset. The processor may determine the proximity of the wireless headset to the mobile device. For example, the processor may compare the data to a reference value, such as one based on a transmit class (e.g., BLUETOOTH class) protocol in use between the mobile telephone and the wireless headset. The processor may correlate relative position data to determine a direction to the wireless headset. The processor indicate a distance and/or direction to the user via the user interface and may selectively enable one of the wireless headset and an audio interface of the mobile telephone unit as a default device based on the relative proximity to the wireless headset.

The present invention discloses a wireless positioning method and system based on Wi-Fi, which performs positioning more accurately according to the strength of the wireless signal, and at the same time allows users to add new APs, thereby extending the small-range positioning system to a large-scale positioning system to achieve the purpose of sharing multiple user terminals. The positioning method includes the steps of acquiring positioning information of a user terminal to be positioned, calculating the position information of the user terminal according to the positioning information, and storing a new wireless access point into a library, wherein the positioning information includes the wireless access point detected by the user terminal Address and Wi-Fi signal strength, the steps of storing the new wireless access point include: calculating the distance between the user terminal and the new wireless access point according to the Wi-Fi signal strength; The distance between the wireless access points is obtained to obtain the location information of the new wireless access point; the address and location information of the new wireless access point are stored in the database.

A method and system are described for proximity detection performed at an electronic device. In the described embodiments, an application is executing on the electronic device. The electronic device determines a target wireless signal strength based on a target distance. The electronic device receives a Bluetooth low energy (BLE) wireless signal from a second electronic device and generates a received wireless signal strength based on the received BLE wireless signal. The electronic device then compares the received wireless signal strength to the target wireless signal strength and on the condition that the received wireless signal strength exceed the target wireless signal strength, the electronic device performs one or more operations wherein the one or more operations include restricting a functionality of the application.

An architecture for minimizing calibration effort in an IEEE 802.11 device location measurement system. The calibration technique is based upon a regression function that produces adequately accurate location information as a function of signal strength regardless of gaps in the calibration data or minimally available data. The algorithm takes a set of signal strengths from known room locations in a building and generates a function giving (x,y) as a function of signal strength, which function may then be used for the estimation of new locations. Radial basis functions, which are simple to express and compute, are used for regression. The fact that the algorithm maps signal strength to continuous location makes it possible to skip rooms during calibration, yet still evaluate the location in those rooms.

The invention discloses a network switching device, comprising a first detection module and a first open module, wherein the first detection module is used for detecting the wireless signal strength of a wireless network currently accessed by a mobile terminal, and the first open module is used for opening the mobile data network channel of the mobile terminal when detecting that the wireless signal strength is smaller than a first preset threshold and continues for a first preset duration. The invention further provides a network switching method. When wireless network accessed by the mobile terminal breaks down, or is invalid or poor in network conditions, the network switching device can help a user to automatically open the mobile data network channel of the mobile terminal to achieve the automatic switching of networks, thus the offline of the mobile terminal caused by the unstable wireless network is avoided, the user gets on the Internet smoothly and stably is ensured, the user is prevented from omitting important network information and network notices by the network problem, and the online experience of the user is improved.

A method and system of generating an indoor radio map. In order to reduce the influence of multipath effect on indoor localization and improve the accuracy of indoor localization, a technique of processing data for indoor target locating and a technique of locating an indoor target based on the above technique is proposed. The method for generating an indoor radio map performs a smoothing process on the wireless signal strength measured in at least one position by a mobile node based on wireless signal strengths measured by the mobile node at adjacent positions, so as to reduce the influence of multipath effect.

The invention provides a wireless bandwidth selecting method based on WLAN wireless bandwidth assessment. The wireless bandwidth selecting method based on WLAN wireless bandwidth assessment includes the steps that wireless access points of wireless signals are scanned and output within a preset time period; the number of the wireless access points with the first working frequency band and the wireless access points with the second working frequency band is counted; the intensity of the wireless signals output from other wireless access points around the main wireless access point is detected; a first channel bandwidth or a second channel bandwidth is automatically selected according to the number of the wireless access points with the first working frequency band and the wireless access points with the second working frequency band, and the intensity of the wireless signals output from the wireless access points, with the first working frequency band and the second working frequency band, around the main wireless access point. The optimal bandwidth can be selected automatically according to changes of surrounding wireless network environment; when surrounding wireless interference is strong, the bandwidth is automatically converted to be 40 MHz, and high-rate transmission is guaranteed; when surrounding wireless interference is weak, the bandwidth is automatically converted to be 20 MHz, and the basic wireless communication quality is guaranteed.

The invention discloses an indoor positioning method and system and a positioning platform, and relates to the technical field of positioning of the mobile Internet. The method includes: obtaining prior probability of wireless signal strength detected at reference points according to the wireless signal strength of a positioned terminal and a signal strength probability distribution diagram of the reference points; obtaining posterior probability according to the prior probability and based on a Bayesian decision; and multiplying the posterior probability with a matrix of transition probability of the reference points, and outputting the reference point with the maximal transition probability as a positioning result of the positioned terminal. The method, system and platform build the indoor wireless signal strength probability distribution diagram through a transfer HMM model to realize a universal method for accurate positioning, and by combination of a wireless signal strength acquisition and preprocessing mechanism and a probability distribution matching method based on the transfer HMM model, an indoor accurate positioning service with good experience can be provided to a user.

The invention relates to a method for power distribution and antenna selection in a distributed type antenna system, which is a technology used for allocating power and an antenna resource of a mobile communication distributed type antenna system. When a mobile terminal moves in the coverage range of a wireless signal of the distributed type antenna system, a base station realizes a process of quickly selecting antennas according to the strength of the wireless signal of the mobile terminal received each antenna by directly carrying out transmitting power configuration on the antennas with better channel condition, and the switching of the mobile terminal and the enhancement of the power efficiency of the system are realized by the base station in the system in a simple method. The method for power distribution and antenna selection in the distributed type antenna system has the basic rule that the mobile terminal is always communicated with the antennas with better channel condition aiming at the coverage range of different antennas in a coverage subdistrict of the wireless signal of the distributed type antenna system, the whole process of selecting the antennas is completed in the base station from the measurement and judgment of the wireless signal to the execution of the transmitting power configuration, and a signal transmission process is not needed.

The invention particularly relates to a wireless fidelity (Wi-Fi) indoor positioning method, and aims at resolving the problems that in a traditional Wi-Fi indoor positioning method, a feature information position fingerprint map data base is too large, computation complexity in an on-line positioning phase matching process is high, instantaneity is poor, and the like. The method includes that when a point to be detected receives a wireless signal strength value sent by a wireless connection point, a support vector machine classifier is adopted to position the point to be detected to a corresponding ith subregion, and a position fingerprint map and a feature transformational matrix Ai of the subregion are obtained; and the feature transformational matrix Ai of the ith subregion is adopted to enable the wireless signal strength value of the point to be detected to achieve shiftdim, a d-dimension wireless signal strength value is obtained and matched with the subregion, the weight K-nearest neighbor node algorithm is adopted to forecast position coordinates of the point to be detected, and positioning results are output. The Wi-Fi indoor positioning method is applied to the communication field.

A content sharing method for a first electronic device is provided. The method includes: scanning several wireless signals and determining several slave electronic devices sending the wireless signals; according to the wireless signals, calculating a wireless signal strength corresponding to each slave electronic device; and according to the wireless signal strengths of the slave electronic devices, choosing a first slave electronic device among the slave electronic devices, wherein the wireless signal strength of the first slave electronic device is stronger than the wireless signal strengths of the other wireless signal strengths among the wireless signal strengths. The method further includes: building up a connection to the first slave electronic device; and, through the connection, automatically sending a content played in the first electronic device to the first slave electronic device and synchronously displaying the content on the first slave electronic device.

The invention discloses a wireless positioning method and system based on depth learning and aims to solve a problem of non-high indoor positioning precision. The method comprises steps that S1, wireless signal intensities received by all sampling points are acquired; S2, a depth learning algorithm is utilized to input the acquired wireless signal intensities and coordinates to a depth learning neural network to generate a depth learning neural network with a weight; and S3, wireless signal intensities of users are acquired and are inputted to the depth learning neural network with the weight to determine the positions of the users. The method is advantaged in that indoor positioning precision can be improved, and an over-fitting problem in a full connection layer of the neural network can be avoided.

The invention discloses a method and terminal for automatically switching over an infinite signal. The method comprises the step of acquiring the strength of a wireless signal connected at present; the step of judging whether the strength of the wireless signal connected at present is lower than a set threshold value or not; the step of judging whether a second wireless signal exists or not in the current environment when the strength of the wireless signal connected at present is judged to be lower than the set threshold value, wherein the second wireless signal is a wireless signal except the wireless signal connected at present; the step of judging the strength of the wireless signal connected at present and the strength of the second wireless signal when the second wireless signal exists; the step of switching the wireless signal connected at present to the second wireless signal if the strength of the second wireless signal is larger than the strength of the wireless signal connected at present. By means of the technical scheme, when the wireless signal is weak, the terminal can remind a user to detect the operation of files transmitted at present and can directly switch a strong signal to the user, and accordingly more humanized experience is brought to the user.

A computer-implemented method for determining device location of a user device within a venue using a wireless positioning system is provided. The method includes identifying a plurality of signal sample sets, wherein each signal sample set includes a sample location within the venue and one or more wireless signal strengths of associated wireless access points positioned at the venue, wherein the sample location is determined based on location data associated with a corresponding payment card transaction within the venue. The method also includes receiving a subject wireless signal strength sample of the wireless access points captured by the user device at an unidentified location within the venue. The method further includes determining a subject location of the user device based on the plurality of signal sample sets and the one or more subject wireless signal strength samples, and providing the subject location of the user device within the venue.

The invention provides a ZigBee-based quadrocopter farmland positioning system which comprises a plurality of known positions, ZigBee beacon nodes at the same height, and to-be-positioned quadrocopter nodes composed of the quadrocopter and ZigBee nodes, and also a positioning method which comprises the steps of selecting four beacon nodes strongest in wireless signal intensity when the quadrocopter flies over the farmland, calculating the spatial distance between the node of the quadrocopter and each beacon node through the intensity of a received wireless signal, mapping the spatial distances into horizontal distances between the node of the quadrocopter and the beacon nodes within the horizontal plane, combining every three beacon nodes to form a triangular positioning subregion and forming 4 subregions in total, for each subregion, calculating the relative coordinates of the quadrocopter by a trilateral positioning method, next, calculating the center of mass of a quadrangle formed by the four pairs of relative coordinates by a center-of-mass method, and then taking the coordinates of the center of mass as the final position coordinates of the node of the quadrocopter. The ZigBee-based quadrocopter farmland positioning system is capable of realizing low-cost, high-precision and fast-positioned regional operation in the farmland.

The invention discloses a method and a terminal for prompting the intensity of wireless signals. The method includes steps of acquiring the intensity of currently connected wireless signals; judging whether the intensity of the connected wireless signals is lower than a set threshold value or not; and transmitting prompting information to a user according to a judgment result if the intensity of the wireless signals is lower than the set threshold value. According to the technical scheme, the method and the terminal have the advantages that the user can be timely prompted to check current file transmission operation when the intensity of the wireless signals is low, and the method and the terminal bring humanized experience for the user.