164 results about "Multi user environment" patented technology

A database encryption system and method, the Structure Preserving Database Encryption (SPDE), is presented. In the SPDE method, each database cell is encrypted with its unique position. The SPDE method permits to convert a conventional database index into a secure one, so that the time complexity of all queries is maintained. No one with access to the encrypted database can learn anything about its content without the encryption key. Also a secure index for an encrypted database is provided. Furthermore, secure database indexing system and method are described, providing protection against information leakage and unauthorized modifications by using encryption, dummy values and pooling, and supporting discretionary access control in a multi-user environment.

An electronic receiver comprises a nonlinear distortion modeling circuit and a nonlinear distortion compensation circuit. The nonlinear distortion modeling circuit is operable to determine a plurality of sets of nonlinear distortion model parameter values, where each of the sets of nonlinear distortion model parameter values representing nonlinear distortion experienced by signals received by the electronic receiver from a respective one a plurality of communication partners. The nonlinear distortion compensation circuit is operable to use the sets of nonlinear distortion model parameter values for processing of signals from the plurality of communication partners. Each of the sets of nonlinear distortion model parameter values may comprises a plurality of values corresponding to a plurality of signal powers. The sets of nonlinear distortion model parameters may be stored in a lookup table indexed by a signal strength parameter.

A method and system for communication over a wireless network has a plurality of communication channels formed between a plurality of transmitters and at least one receiver and is especially beneficial in a multiuser environment having a plurality of receivers. A characteristic is determined for each channel and then a set of weighting factors is selected to be applied to the transmitters based on the channels characteristics. The weighting factors are selected for optimizing the signal power at a receiver and a quality indication is determined for each channel based on the selected weighting factors. The indication is used to prioritize the allocation of the channels.

Touch screen interfaces suffer from a visual-motor conflict when the user attempt to interact with a virtual object but experiences no physical sensations resulting from that interaction. This can result in uncertainly and decrease performance as well as overall satisfaction with the interface. We introduce a method and device that resolves these issues in stylus-based interfaces for both single and multi-user environments by providing individualized haptic and acoustic feedback. This is achieved by adding a mechanical actuator and acoustic generator to each stylus. These are controlled to respond appropriately to virtual objects and are capable of simulating a variety of physical sensations. Because the feedback is generated by the stylus rather than the screen or touch surface, the current invention can operate at the individual level even in the presence of multiple simultaneous users.

The present invention is directed to a network communication system and apparatus for use by multiple users, wherein a single user can concurrently, or substantially simultaneously, utilize multiple communication modalities and communicate with different users without regard for the transmission capabilities of any particular user. The communication system comprises a communication manager, a plurality of communication mediums or modalities, at least one storage database, and an administrative manager, wherein the plurality of communication mediums are integrated for substantially simultaneous use by a single user in a multi-user environment.

An application wrapper system and method provide a technique for privatizing application software resources from an operating system shared resources. The present invention allows the application software to execute in a secured run-time environment. The preferred embodiments of the present invention eliminates application conflict, protects operating system resources, provides multiple instance run-time for instance made to execute single instance and provides multi-user environment.

A computer system and method allows customization of a desktop of a user in a multiple user environment, such as a windows type operating system. Configuration files trigger a program to execute upon the invocation of the operating system by the user and install or delete elements. The program has a list associated with the program wherein if the list contains at least one element, the program checks whether the at least one element in the list has been executed on a desktop of a user; and if the elment has not been executed for the user, the program executes the at least one element. The at least one element may include custom desktop components. Configuration files may include a registry.

A method implemented on the graphical user interface device to invoke an independent, user-localized menu in an application environment, by making a predetermined gesture with a pointing device on an arbitrary part of a display screen or surface, especially when applied in a multi-touch, multi-user environment, and in environments where multiple concurrent pointing devices are present. As an example, the user may trace out a closed loop of a specific size that invokes a default system menu at any location on the surface, even when a second user may be operating a different portion of the system elsewhere on the same surface. As an additional aspect of the invention, the method allows the user to smoothly transition between the menu-invocation and menu control.

An automotive radar system is disclosed that comprises an interference classifier 203 for determining a type of interference in a signal received from a multiuser environment. A sweep pattern comprising frequency sweep signals for a transmitted radar waveform is then advantageously determined in dependence upon the level of interference experienced by frequency sweep signals for the determined type of interference. The automated radar system comprises: a receiver 102 operable to receive a noise signal comprising burst noise, frequency chirp signals generated by one or more other users, or a combination thereof; a signal generator 109, 110 operable to generate a plurality of different frequency sweep signals; a signal combiner 104 operable to combine each frequency sweep signal with a received noise signal to generate a combined signal for each frequency sweep signal; an interference classifier 203 operable to identify combined signals corresponding to received noise signals comprising frequency chirp signals and to determine the noise levels of said combined signals corresponding to received noise signals comprising frequency chirp signals; and a selector 206 operable to select a plurality of frequency sweep signals in dependence upon the noise level determinations by the interference classifier 203 on the combined signals corresponding to received noise signals comprising frequency chirp signals; and a control unit 206 operable to determine a sweep pattern comprising the selected plurality of frequency sweep signals to be transmitted as an output radar waveform.

A control method and a control system for a home network system in a multi-user environment are disclosed. The control system includes a plurality of slave devices, a user ID receiver receiving user ID data from a user, and a master device coupled to the slave devices for operation control. The master device includes a memory and a controller coupled to the memory and the user ID receiver. The memory initially prestores user-specific control settings preset by a plurality of preregistered users and user ID data of the preregistered users. Then, the controller authenticates the user upon receiving the user ID data from the user ID receiver, and it automatically controls operational functions of the slave devices according to the user-specific control settings of the authenticated user, which is extracted from the memory.

The invention discloses an air conditioner which comprises a storage module, a recognition module, a computing module and a control module. The recognition module is used for recognizing users and the sexes and ages of the users and matching initial air conditioning parameters of the users in the storage module. The computing module is connected with the recognition module and used for computing the weight coefficient initial values of the users, computing the age weight correction values and the sex weight correction values according to the ages and sexes and computing total control parameters. The control module controls the air conditioner to supply air according to the total control parameters. According to the implementation mode, the air conditioner can combine the ages and sexes of the users to supply air in the multi-user environment, and priority is given to the old, children and female users, so that the air conditioner is more reasonable to use in the multi-user environment.

The present invention provides an efficient means of estimating symbols transmitted in a multi-user environment in overloaded or super-saturated conditions by employing a deferred decorrelating decision feedback detector. In one embodiment, the present invention comprises a parameter estimation unit, filter bank, overloaded whitener and decision tree-based hypothesis testing. Parameter estimation defines the matched filter bank, whitening filters, and the terms of the hypothesis testing module. The whitening filter partially decouples co-channel interference and partially whitens the noise. The decision tree approach defers decisions until more evidence is accumulated and is a generalization that encompasses the jointly optimal maximum likelihood detector as well as the simpler decision feedback detectors.

The invention discloses a method for keyword searchable encryption based on bilinear pairs in cloud storage. The method includes the steps that firstly, system parameters are initialized; users are added; thirdly, encryption and security indexes for files are generated; fourthly, search tokens, relative to keywords, of the users are generated; fifthly, a cloud storage server is searched for keywords relative to ciphertexts; sixthly, the ciphertexts are decrypted by the users; seventhly, the users are logged out. According to the method, the authorized users can look for the encrypted files through a trap door connected with the keywords. The keywords used by the users for search cannot be known even by the cloud storage server, so that security of user information can be guaranteed; Compared with an existing scheme, the comprehensive efficiency of the aspects of communication and calculation cost, namely the aspects of the search speed of the size of the trap door, the encryption and search speed of the keywords, of the provided scheme is improved, and the method is suitable for multi-user environments.

The various implementations of the present invention are provided as a computer system configured to allow for sending requests for aid, responding to requests for aid, and receiving requests to aid in a multi-user environment. Various levels of requests may be requested. In one preferred embodiment of the present invention, a mobile application for integrating the options for requesting aid from a first device to a second is provided, as well as configuration of automated responses. The system allows certain users to post status updates to a website. While useful for many environments, the most preferred embodiments of the present invention are adapted for use in an educational environment to provide school administrators, teachers, parents, and students with enhanced communication capabilities.

An apparatus and method for controlling amount of information to be fed back in a multiple antenna system in a multi-user environment. The apparatus includes a channel estimator which estimates channel values by using an input signal; a Singular Value Decomposition (SVD) operator which decomposes singular values from the estimated channel values; and a feedback determining unit which uses the singular values to compute channel capacity that can be obtained according to the amount of channel information to be fed back, and selects the channel information to be fed back by using the channel capacity.

A proximity-aware multi-touch tabletop is disclosed that includes both a touch screen display and proximity sensors. The proximity sensors are disposed in one or more annular groups around the touch screen display and are positioned in upward- and outward-facing directions. The proximity sensors allow the multi-touch tabletop to sense the distance of a body, arm, hand, or fingers of a user from the multi-touch tabletop. Thus, hand, arm, and finger positions of a user can be determined relative to the body position of the user, which enables the multi-touch tabletop to differentiate between left hand / arm gestures and right hand / arm gestures. Further, because the multi-touch tabletop can correlate left arm and right arm movements to a user body, the multi-touch tabletop can differentiate gestures originating from different users. The ability of the multi-touch tabletop to distinguish between users greatly enhances user experiences, particularly in a multi-user environment.

The present invention provides a radio transmitting and receiving apparatus having multiple antennas that can decrease an influence due to interference between cells that exists in a multi-cell environment, by using a transmission method that not only considers performance of a corresponding cell but also an influence due to interference on adjacent cells and an influence due to interference from the adjacent cells in a multi-user and multi-cell environment, effectively use limited radio resources, and increase a data rate of a radio communication system, and a method thereof.

A method and apparatus for provisioning media content in a multi-user environment is disclosed. A system that incorporates teachings of the present disclosure may include, for example, a Set-Top Box having a controller element to: receive multimedia content from a communication system; configure individual access to the multimedia content among a group of users in accordance with individual user profiles, wherein each of the individual user profiles has a separate service package provided by one or more broadband providers; and provision a delivery of the multimedia content to a media device in accordance with access settings defined at least in part in the individual user profiles. Additional embodiments are disclosed.

Embodiments of the present invention provide a method, system and computer program product for context restoration via saved history when rejoining a meeting in a multi-user environment. In an embodiment of the invention, a method for context restoration via saved history when rejoining a meeting in a multi-user environment can include displaying a contemporary view of a meeting in a multi-user environment hosted in memory of a computer, detecting an inactive participant to the meeting, subsequently detecting a rejoining of the inactive participant to the meeting, and additionally displaying concurrently with the contemporary view, a playback view of a portion of the meeting computed when the participant had been inactive.

Systems and methods according to the present invention provide sign on systems for devices, e.g., televisions, which balance ease of use with security and access control that is amenable to, e.g., household usage.

A method and an apparatus for allocating channels in at least one of a multi-user and a multi-service environment for transmitting real-time traffic data in a wireless packet data network is provided. The method comprises determining a desired transmission rate for a first mobile station to allocate a unique frequency channel from a plurality of frequency channels to an individual user of a plurality of users. The method further comprises mapping a data stream associated with the individual user to the unique frequency channel based on the desired transmission rate for the first mobile station. A transmitter may allocate channels for transmitting real-time traffic data in a wireless communication system. The transmitter may comprise a plurality of encoders to independently encode data streams of each individual mobile station user of a plurality of mobile station users, a first resource allocator coupled to the plurality of encoders to allocate bit and power to the plurality of mobile station users, and a second resource allocator coupled to the plurality of encoders to allocate a unique frequency channel of a plurality of frequency channel to each mobile station user of the plurality of mobile station users based on at least one of channel state information and a desired transmission rate.

A playback resume system and method for a media center are described. This invention is applied to a scheme of the media center. Particularly, a personalized device capable of transmitting a proprietary identifier is used to be a controller of the media center. By means of the proprietary identifier, the invention can be implemented in a multi-user environment, and used for different playback devices or in different playback situations. Since the playback scheduled progress can be saved, the invention reaches a more convenient and fast resume purpose. The preferred embodiment includes the steps of establishing a connection between a multimedia controller and a multimedia server, and receiving a proprietary identifier and a playback command transmitted from the controller and the server. After that, the multimedia server reads the last playback multimedia data and its scheduled progress with corresponding identifier, and then resumes the playback progress.

The invention discloses an attribute-based searchable encrypted electronic medical record system and an encryption method. The system comprises a key distribution center and a cloud storage center, wherein the key distribution center generates public parameters and a master key to initialize the system; the key distribution center generates and distributes keys containing user attributes to users;a data owner sets an access strategy before uploading medical record data, encrypts the data, and then uploads the data to the cloud storage center; a data visitor generates a trap door according tokeywords and the keys, and provides a query request to the cloud storage center; and after receiving the query request, the cloud storage center determines to return corresponding encrypted data to the data visitor according to the trap door and keyword ciphertexts. According to the scheme of the invention, the difficulty of key management in a multi-user environment can be reduced, data users canbe supported to accurately query the keywords of the ciphertexts, guessing attacks of the keywords can be resisted, and the leakage of privacy data can be effectively prevented.

The invention relates to a resource allocation method for a low-delay high-reliability service in mobile edge computing, and belongs to the technical field of mobile communication. According to the method, in a multi-MEC multi-user environment, a user task queue model and an MEC task queue model are described respectively, a theoretical model of mobile service provider network utility maximizationis established with the task queue overflow probability as the constraint, and joint allocation is performed on power resources, bandwidth resources and computing resources. Considering that a constraint condition in the optimization model comprises a limit constraint of a task queue overflow probability; a random optimization problem of time averaging is converted and decomposed into three sub-problems of single-time-slot solving through a Lyapunov optimization theory, including calculation resource allocation of users, bandwidth and power allocation and calculation resource allocation of MEC, and then the three sub-problems are solved respectively. According to the method, the average total income of the MSP is improved while the requirements of users for low time delay and high reliability are met.

The present invention relates to a system and method for providing a user access to at least one host computer through a Keyboard, Video, and Mouse (KVM) switch based upon biometric authentication of the user. In one embodiment, a method is provided for permitting a user to access a KVM switch based upon biometric data associated with a user in a single user station environment and a multiple user environment. In another embodiment, a system is provided for permitting a user to access a KVM system in a single and / or multiple user environment based upon biometric data associated with the user. The system further provides for direct coupling of host computers to the KVM switch and / or utilizing host adapters to couple a host computer to an input station. The system is scalable by communicatively coupling a fabric which may include associations with host computers or additional fabrics to the host adapters in order to provide a user a logical connection to a wide assortment of host computers.

The present invention tightly integrates and significantly leverages media capture systems to realize a ubiquitous collaborative multi-user environment, referred to as TalkingPaper, taking full advantages of what each unique medium can offer and further enhancing their respective functions and utilities. The invention comprises a paper-pen based knowledge capture subsystem A and a knowledge processing subsystem B. A user uses a subsystem A compliant pen to sketch on a piece of subsystem A enabled paper. The sketching activity, speech and gesture are recorded by the pen, which sends the captured data to a multi-threaded application server of subsystem B for further processing. The server converts and indexes the data to associate and synchronize each line stroke with corresponding audio time frames and enable the content interaction. Thus, users can easily find, select, and replay a session with synchronized speech, text, and video to understand the rationale behind certain ideas or decisions.