1586 results about "Communication channel" patented technology

A WLAN system adapted to apply QoS differentiation to a media stream to be transmitted from a transmitting station (STA) to a receiving STA of that system. The transmitting STA processes the media stream to generate a base sub-stream and one or more enhancement sub-streams for subsequent transmission over a wireless communication channel and assigns different priorities to different sub-streams. Depending on the channel conditions, the transmitting STA may select to discard, without transmission, portions of data from enhancement sub-streams. The selection process is based on the assigned priority and operates to preserve as much of relatively high-priority data as possible. The receiving STA then processes the received data to generate a reconstructed media stream, which provides signal quality equal to or better than the signal quality supported by the base sub-stream. Advantageously, a WLAN system of the invention is adapted to change signal quality dynamically and incrementally in a manner commensurate with current channel conditions without the need for communication between the higher and lower network layers. In addition, it provides gradual and graceful degradation of signal quality when channel conditions deteriorate as opposed to abrupt degradation inherent in analogous prior art systems.

A wrist-mounted device for measuring at least one physiological parameter of a subject. The present invention enables such a measurement to preferably be transformed into clinically useful information about the subject. Such information may then optionally be sent to medical personnel, for example at a contact and / or monitoring center, through a gateway device. The gateway device preferably communicates with the wrist-mounted device of the present invention through a wireless communication channel.

Technologies described herein generally relate to communications between electronic systems. Each electronic system includes a touch-panel device that may be positioned in proximity to one another such that the near field emissions of the touch-panel devices interact with one another. The touch-panel devices can be adapted to sense one another based on these near field emissions. Once detected, the touch-panel devices can be configured to establish a communication channel to communicate information between one another via modulated near field emissions. Such exchanged information may include identification information, network addresses, security keys, and so forth. The exchanged information may be used for discovery or pairing between the touch-panel devices. The technology presented herein can support an intuitive user experience and improved security over traditional wireless pairing approaches.

Various exemplary embodiments of the present disclosure describe systems and methods for charging electronic devices using wireless power delivery systems. The described systems include one or more wireless power transmitters, one or more wireless power receivers and one or more electronic devices. Electronic devices may be able to communicate with wireless power transmitters and wireless power receivers using suitable communications channels. The disclosed systems are capable of associating a wireless power receiver with a customer to deliver power to a customer's device.

Exemplary systems and methods for detecting a communication channel of a bot. In exemplary embodiments, presence of a communication channel between a first network device and a second network device is detected. Data from the communication channel is scanned and used to determine if a suspected bot communication exists. If a bot communication is detected, then a recovery process may be initiated.

A system and method for improving digital communication in a wireless mobile ad-hoc network. More specifically, the system includes one or more portable network devices operable to support the seamless operation of a self-initializing, self-healing, adaptive portable network. The portable network devices implement protocols that provide bandwidth management capabilities for use with radios, routers and other wireless network devices. Each portable network device includes at least one wireless transceiver, a processor and control software. The processor and control software are logically coupled to the wireless transceiver to facilitate digital communication via a plurality of communication channels with other network devices.

A communication protocol includes a hierarchical arrangement of time slots within a communication channel for transmission and reception of isochronous data (e.g., video, audio, etc.) between components of a computer network. One of the time slots may include a window for transmission of keyboard and / or cursor control data from a client unit to a server, for example as a series of past and present keyboard and / or cursor control entries, with these entries being accompanied by a counter value indicative of the number of new entries since a previous transmission. Audio rate control information may also be transmitted from the client unit to the server during the reverse time slot and may be used by the server to determine the amount of audio information to be transmitted to the client unit in a subsequent forward time slot transmission period. The audio rate control information is determined according to the amount of stored audio information at the client unit. The client unit transmits rate control information so as to ensure sufficient audio information will be available for synchronized playback with video information received from the server.

Methods and apparatuses provide surveillance of a convoy. At least one unmanned aerial vehicle (UAV) obtains images around the convoy's position to provide information about potential hostile activity while the UAV follows a generally curvilinear path around the convoy as instructed by one of the convoy vehicles. Path planner algorithm software is executed by the controlling convoy vehicle in which position and velocity information regarding the unmanned aerial vehicle and the convoy are processed to determine values of control variables. The determined values are sent to the unmanned aerial vehicle over a wireless communications channel. The path of the surveillance vehicle may be changed in order to provide evasive measures to avoid an attack on the surveillance vehicle by an adversary.

In transcoding a frequency transform-encoded digital video signal representing a sequence of video frames, a foveated, compressed digital video signal is produced and transmitted over a limited bandwidth communication channel to a display according to the following method: First, a frequency transform-encoded digital video signal having encoded frequency coefficients representing a sequence of video frames is provided, wherein the encoding removes temporal redundancies from the video signal and encodes the frequency coefficients as base layer frequency coefficients in a base layer and as residual frequency coefficients in an enhancement layer. Then, an observer's gaze point is identified on the display. The encoded digital video signal is partially decoded to recover the frequency coefficients, and the residual frequency coefficients are adjusted to reduce the high frequency content of the video signal in regions away from the gaze point. The frequency coefficients, including the adjusted residual frequency coefficients, are then recoded to produce a foveated, transcoded digital video signal, and the foveated, transcoded digital video signal is displayed to the observer.

Method and apparatus for transmitting messages between communication devices via a communication channel allowing at least voice messages to be transmitted, the messages including data subdivided in a sequence of basic data units, the method including; a) encoding the basic data units as unique signals (usj) including a predetermined number of basic signals (bi), each basic signal having a unique fixed frequency (fi); b) transmitting a sequence of unique signals (usj) during a sequence of fixed time periods (t1, t2, t3, . . .); c) receiving and decoding the sequence of unique signals (usj) into the sequence of basic data units; the data being transmitted in superposition over voice.

The invention provides a method and system for enabling in-line communications channels between a plurality of computational systems and a switch, and / or a plurality of switches and a router. In a first version of the invention an in-line system receives uplinks of aggregated data from a plurality of switches and applies policies to the each aggregated data stream prior to transmission of the aggregated data streams from the in-line system to the router. At least one computational system provides a user identification associated with a user profile to the in-line system. The user profile informs indicates to the in-line system of the constraints imposed upon and activities permitted to the computational system originating the user identification. The constraints may include (a) one or more customized policies, (b) policies applicable to a group associated with the user identification, (c) virus / worm detection & protection, (d) a firewall, (e) virtual private network rules, and / or (f) encryption / decryption. In a second version the in-line system is configured to communicate directly with one or more computational systems as well as one or more switches.

Digitally compressed video / audio bit streams, when transmitted over digital communication channels such as digital subscriber loop (DSL) access networks, ATM networks, satellite, or wireless digital transmission facilities, can be corrupted due to lack of sufficient channel bandwidth. This invention describes schemes to ensure lossless transmission of bit streams containing pre-compressed video signals within the communication channels. The schemes herein comprises a rate conversion system that converts the bit rate of a pre-compressed video bit stream from one bit rate to another, and that is integrated with a digital communication channel, and a means to convey the maximum channel transmission rate to the rate conversion system to allow satisfactory transmission of the bit stream from the input of the rate converter through the transmission facility.

A method and apparatus are provided that dynamically allocates communication streams to provide flexible bandwidth to terminals of a communications system. In one embodiment the invention includes identifying a first terminal and a second terminal to each other for the communication of traffic over at least one of multiple streams; and dynamically allocating and de-allocating further streams based on the traffic to be carried and the traffic capacity of opened streams between the first and the second terminals. The invention may further include comparing traffic to be carried between the first terminal and the second terminal to the capacity of any open streams between the first terminal and the second terminal and allocating or de-allocating at least one stream based on the comparison. Alternatively, the invention may include comparing depths of transmit queues to the capacity of any open streams between the first terminal and the second terminal and allocating or de-allocating at least one stream based on the comparison.

A method for providing secure connection between vehicles over channels of a wireless communication network, according to which, a first unique pair of digitally signed public key and private key is provided to each vehicle, along with additional vehicle-related data including a visually static collection of attributes of the vehicle. A unique certificate number is generated for each vehicle and monolithic data consisting of the public key, the certificate number and the attributes is signed by a trusted certificate generating authority. Prior to wireless communication between a first vehicle and a second vehicle, a verification step is performed during which the first vehicle sends its unique certificate number to a second vehicle over a communication channel; the second vehicle verifies the authenticity of received unique certificate number of the first vehicle and attributes by a camera that captures attributes which are visible, using image processing means. If the attributes are verified successfully, the second vehicle sends its unique certificate number to the first vehicle over a communication channel, along with a secret session key, which is valid for the current session only. Then the first vehicle verifies the authenticity of received unique certificate number of the second vehicle and attributes by a camera that captures attributes of the second vehicle which are visible, using signal processing means and both vehicles are allowed to securely exchange message or data using the secret session key.

Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.

A method of generating Source Identification information from a source packet stream and reliably transmitting the Source Identification information from a source to a destination over a communications channel is provided. The method operates on a set of source packets, wherein Source Identification information for each source packet to be transmitted is derived and delivered with the Source Identification information of all or most other source packets of an associated source block. The method includes techniques to minimize the network bandwidth required to deliver Source Identification information and techniques to overcome network impairments. When combined with FEC techniques, retransmission techniques, or combinations of FEC techniques and retransmission techniques, the methods described herein allow receivers to recover lost source packets, while simultaneously ensuring that the original source packets are not modified and thereby ensuring backwards compatibility for legacy receivers.

A system and method for identifying communication channels and appropriate timing of communications that facilitate enhancing or maximizing the utility of a communication between communicating parties, based on the participants' preferences and capabilities is provided. The system and method implement policies for facilitating optimal communications between communicating parties based on deterministic and / or uncertain preferences, capabilities and context, both present and predicted, where a decision to employ an initially selected channel and timing of communication may be overridden by contactor or contactee based on user-configurable triggers. The system and method further provide for mixed / multi-initiative overriding of the identified optimal communication channel and indicated best time for a communication. The methods can be implemented on a widescale communication system or within a single portable device. In one approach, the system attempts to optimize the inferred or directly accessed preferences of a contactee given the accessed or inferred preferences, capabilities and goals of the contactor while keeping the rationale and context of the contactee private. Such optimization can be achieved using preferences and policies concerning handling the attempted contact based on a deterministic specification or through inferring context, content and task under uncertainty by employing probabilistic or decision-theoretic inferences to attempt to maximize the expected utility of the communication to the contactee.

The invention relates to systems for a transmission of images via channels of communication with a limited capacity by means of application of compression of the images. The technical result consists in an increase of the compression degree upon encoding, and it allows to fulfill the transmission of such encoded images via the channel of communication with the limited capacity, therewith a high degree of the compression is provided without of increase of computational power of encoding device and without of distortions upon decoding. The result is obtained by the usage of more effective method of interpolation of restored subsamples, in this method there is used an adaptive and applicative set of samples, which restore a quantized signal, and this set of the samples allows to improve an accuracy of the interpolation with a number of the subsamples, which is necessary for the right interpolation that is simultaneously decreased one.

Communication operation is performed with enhanced transmission efficiency by obtaining enhanced communication capacity through optimal allocation of transmission powers to individual MIMO channels obtainable by spatial multiplexing. A transmitter has a plurality of transmission antennas and a receiver has a plurality of reception antennas and perform spatial multiplex communication through transmission and reception with individual antenna weights being set. The transmitter varies the power allocation in units of a communication channel in correspondence to communication quality of the channel. The receiver uses a power allocation value of each communication channel that is estimated in accordance with a reception power of a pilot carrier included in user data after spatially separated. Thereby, the receiver returns the magnitude of the amplitude of a received signal in the signal spacing to an original magnitude, and performs an accurate demapping process.

A method for generating and viewing on a handheld device a 3-D augmented reality feature containing a rich media message that is linked to a physical object comprises the steps of: a) by a first user: i. Taking a picture of a physical object; ii. selecting an augmented reality theme; iii. attaching the rich media animated object to the image taken, in the desired position and location on the physical object; iv. generating a reach media message from the augmented reality image obtained in step (iii); iv. optionally attaching an additional file to the rich media message; v. Transferring the physical object to a second user; and vi. sending to said second user a message via a communication channel, which contains the augmented reality rich media; b) by the second user (the recipient): vii. viewing the physical object received from the first user, using an AR viewer in the mobile phone camera, thereby to see the augmented reality rich media appearing on said physical object.

The present invention provides a method and system to provide network aware applications on a mobile device that can communicate using existing SMS communication channels without resorting to other IP based communication channels that are costlier and are not available on many of the networks.

A technique is disclosed for facilitating communications between a network node and a Head End of an access network. The access network includes a plurality of nodes which communicate with the Head End via at least one upstream channel and at least one downstream channel. The Head End is configured to monitor channel conditions on selected channels of the access network. The Head End is also configured to modify or change the modulation profile used on a selected channel in response to detecting a change in conditions on that particular channel. If the Head End detects that the channel conditions have deteriorated, the Head End may change the modulation profile on the selected channel to one which is better suited for transmitting data on the channel given the current channel conditions. If the Head End detects that the channel conditions have improved, the Head End may change the modulation profile on the selected channel to one which provides for faster data transmission on the selected channel.

A message system for delivering data in the form messages between message clients comprises a server cluster with a group of client manager nodes and a group of independent message manager nodes. The client manager nodes have the function of managing client connections, whereas the message manager are configured to store and distribute messages. The system further comprising communication channel means in the form of a multicast messagebus for providing a multicast communication channel between said at least one client manager node and said at least one message manager node. The system guarantees delivery of a message by storing it until a receiver is ready to consume it.

A multi-rate speech codec supports a plurality of encoding bit rate modes by adaptively selecting encoding bit rate modes to match communication channel restrictions. In higher bit rate encoding modes, an accurate representation of speech through CELP (code excited linear prediction) and other associated modeling parameters are generated for higher quality decoding and reproduction. A speech encoder employing various encoding schemes based upon parameters including an available transmission bit rate. In addition, the speech encoder is operable to identify and apply an optimal encoding scheme for a given speech signal. The speech encoder may be applied code-excited linear prediction when the available bit rate is above a predetermined upper threshold. Pitch preprocessing, including continuous warping, may be applied when it is below a predetermined lower threshold. The encoder considers varying characteristics of the speech signal including the long term prediction mode of a previous frame, and a spectral difference between the line spectral frequencies of a current and a previous frame, a predicted pitch lag, an open loop pitch lag, a closed loop pitch lag, a pitch gain, and a pitch correlation.

An apparatus for providing location-specific alert information associated with an alert condition relevant to a geographical area may include a receiver adapted to receive transmissions comprising formatted text on a communication channel of a wireless bi-directional communication network; a peripheral device operable to indicate an alert condition, including displaying the formatted text; and a controller communicatively coupled to the receiver and the peripheral device. The controller is operable to monitor a communication channel of the network for the receipt of a transmission of location-specific alert information from a transmitter servicing a geographical area and to operate the peripheral device in response to the reception of the transmission of the location-specific alert information to display the formatted text. The location-specific alert information is broadcast within the geographical area by at least one transmitter of the wireless bi-directional communication network having communication channels and transmitters which are each positioned to provide communication services to specific geographical areas serviced by the communication network.

Methods and systems that provide browser notifications are provided. A plurality of communication channels are established between a client device and one or more servers. The plurality of communication channels are associated with a plurality of notification sources for a web application. One or more notifications from the plurality of notification sources are identified. An importance score is generated for each of the one or more identified notifications. An importance score is generated based on a characteristic of a user's interactions with the client device. The one or more notifications are displayed in a viewing area of the client device. The importance score determines an order of display and duration of display for each notification.