170 results about "Squitter" patented technology

A recipient computer system may receive one or more electronic messages. The recipient computer system may send one, two, or more challenge messages to the sender of the electronic messages in determining whether to deliver the electronic message. The recipient computer system may accept or reject an electronic message based on the response, or lack of response, to the challenge messages. The recipient computer system may send two or more challenge messages at intervals. A sender computer system may record activity of the sender computer system for a recipient computer system to use in determining whether to deliver an electronic message. A sender computer system may provide a summary of that activity with an electronic message. A sender computer system may provide an authorization key for a recipient computer system to use in determining whether to deliver an electronic message. The authorization key may be generated by a third party.

Provided is a method, system and software for responding to an incoming electronic message, including determining whether the incoming electronic message is relevant or irrelevant to a user, and if the incoming electronic message is irrelevant to the user, parsing the incoming electronic message for message origination information and replying to the message using the message origination information.

A sending device locates and stores identifying information for each electronic message sent by the device. A receiving device, upon receipt of an electronic message, locates identifying information for the electronic message and the purported sending device of the message. The receiving device communicates a confirmation request to the purported sending device which contains identifying information for the message. The sending device receives confirmation messages and replies to such messages confirming that the message was sent if identifying information in the confirmation request corresponds to identifying information stored by the sending device and denying that the message was sent if the identifying information in the confirmation request does not correspond to stored data.

A communication system comprises a communication device configured to receive a data message, such as a text message, and to generate and send a voice reply to the data message using a simple transmit action. The data message comprises an identifier that can be used to determine a reply path related to the data message. Thus, when a user receives the data message, they can read the message initiate the simple transmit action, and reply to the data message by speaking an appropriate reply into the communication device. The spoken response is stored as a voice message and attached to a data message that is sent using the reply path identified by the identifier.

A system able to locate and identify aircraft and vehicles based on the reception and processing, with novel means and methods, of signals emitted by the transponder of the secondary surveillance radar, shortly SSR. The system has a number of fixed stations distributed in the area of interest, e.g. in the airport area; any signal (the well known SSR reply/squitter) transmitted by the on-board transponder is received by four or more stations and the measurement of three or more differences of times of arrival (TOA) permits the reconstruction of the position of the transponder in spite of the fact that the transmission time is unknown. Suitable algorithms based on optimal estimation enhance both the accuracy of TOA measurements and the accuracy of the reconstructed position. The effects of possible overlapping of signal in time are avoided or mitigated by multiple source separation techniques based on least squares algebraic processing.

The present invention introduces unique functionality whereby there is a substantial reduction in the storage and replication requirements for the locally initiated electronic mail messages, which include locally sourced attachments. In the method of the present invention, at the origination location of an electronic message, there is an identification of electronic messages containing locally sourced attachment documents. During the storage of the transmitted message, there is determination of whether any attachment to the message was a locally sourced attachment. If the attachment was a locally sourced attachment, the attachment may not be stored with the message. Instead a pointer or link can be created to the original or locally sourced document. This approach will reduce the storage space required by electronic messages.

A collision avoidance system and method is based on receiving and processing Mode-S transponder messages without interrogating the transponders of the respective aircraft flying in formation. A collision avoidance computer and Mode-S transponder are used to provide distributed intra-formation control among multiple cells of aircraft flying in formation or close-in. The Mode-S transponder provides ADS-B Global Positioning System (GPS) squitter data to the computer. A mission computer is coupled to the collision avoidance computer. The mission computer may provide steering commands transmitted to other formation member aircraft. The method and system allow a safe separation between 2 to 250 aircraft flying in formation at selectable ranges.

Embodiments of the present invention are directed to a system capable of enforcing document security and delivery policies. In particular, the present invention allows for the detection and removal of files attached to electronic messages. When an attached file is removed from an electronic message, the file may be placed in secure storage. A link to the stored file is inserted in the electronic communication prior to delivery of the message to the addressee of the communication. In order to access the stored file, the recipient of the message is required to select the provided link, which establishes a secure communication channel between the secure storage device and the receiving client computer. Optionally, the recipient may also be required to provide a password and/or digital certificate in order to access the stored file.

When a vehicle location is estimated using only detection signals from a sensor unit installed on a vehicle since the value of dilution of precision (DOP) of a navigation message received by a GPS receiver is equal to or greater than a predetermined threshold in a navigation system, the vehicle location is precisely estimated using a traveled distance, a travel angle difference, and lateral and longitudinal inclinations of the vehicle. The value of DOP of the navigation message received by the GPS receiver is compared with the predetermined threshold. If the value of DOP is less than the predetermined threshold, reference vehicle location information is set using the navigation message. If the value of DOP is equal to or greater than the predetermined threshold, the reference vehicle location information is set using vehicle location information just previously map-matched and the detection signals from the sensor unit. The vehicle location is estimated using the set reference vehicle location information and the detection signals from the sensor unit and then map-matched on a digital map stored in a map data storage unit, thereby displaying the map-matched results on a display unit.

A messaging system treats a set of related messages, such as an e-mail string between two or more people, as a message container having relational references to one or more submessages. A messaging server stores the messages and submessages as discrete message components having content. In addition, the messaging server includes a context module having a context database. The context module defines a knowledge taxonomy having context categories. The context module creates contexts by associating portions of content from the message components with the context categories. The context module also specifies rights and properties of end-users with respect to the context categories and contexts. The context module performs operations utilizing the contexts. The contexts thus allow an enterprise to structure information contained within its electronic messages.

The detection of unsolicited electronic messages is provided for by searching for pre-formatted text indicative of point-of-contact information in the body of an electronic message. A plurality of electronic messages is received, including a first electronic message and a second electronic message, each electronic message including a header portion and a body portion. The body portion of the first electronic message is searched for pre-formatted text indicative of point-of-contact information, and at least a subset of the plurality of electronic messages, the subset including the second electronic message, is searched for the pre-formatted text. The second electronic message is identified as including the pre-formatted text based upon the searching of at least the subset of the plurality of electronic messages, and the first electronic message is flagged as unsolicited based at least upon the identifying of the second electronic message.

An Internet facsimile gateway device that exchanges image information between a data terminal device and a facsimile device through a telecommunication network and the Internet by taking the steps of transmitting the image information included in an electronic mail message to the facsimile device when the Internet facsimile gateway device receives the electronic mail message requesting image-information transmission to the facsimile device, creating a delivery-confirmation mail message notifying a result of the image-information transmission after the image-information transmission by the Internet facsimile gateway device is completed if the electronic mail message requests the Internet facsimile gateway device to transmit the delivery-confirmation mail message to an original address of the electronic mail message, and transmitting the delivery-confirmation mail message to the original address of the electronic mail message.

A positioning device has a reception unit for receiving navigation messages transmitted continuously in a time series from positioning information satellites orbiting the Earth and determines the location of the positioning device based on the navigation messages received by the transmission unit. Each navigation message is segmented into a plurality of data transmission blocks that are transmitted sequentially, a portion of the data transmission blocks carry almanac data containing orbital information for all positioning information satellites including the positioning information satellite transmitting the received navigation message, and the data transmission blocks carrying the almanac data are transmitted non-contiguously. The positioning device also has signal discrimination unit for identifying the start of receiving a data transmission block containing the non-contiguously transmitted almanac data, and identifying the end of receiving the data transmission block containing the almanac data. The reception unit intermittently receives the signals of the data transmission blocks containing the almanac data by receiving the navigation messages in the reception time of the data transmission blocks containing the almanac data identified by the signal discrimination unit.

The optimal direction-based flooding method for relaying a broadcast message for mobile ad-hoc networks comprises (a) an original source node selecting a first relay node; (b) selecting a message relaying direction into an area divided by a predetermined interval; (c) relaying the broadcast message by selecting the first relay node set for each message relaying direction; and (d) selecting a next relay node and relaying the broadcast message received by the previously selected relay node. Duplicated broadcast message transmissions, and competition and collision among the nodes to obtain transmission media, are reduced by transmitting the broadcast message using a minimum number of nodes in a mobile ad-hoc network including nodes having limited resources.

The invention belongs to the field of radio navigation location technology and especially relates to a Beidou terminal signal receiving and processing device and method. The device includes an antenna unit, a radio frequency unit, a baseband signal processing unit, an information processing unit, a power unit and a display control unit connected successively. The method includes capturing fake satellites and satellites respectively by adopting a storage-based baseband capturing method; receiving fake satellite signals and real satellite signals for fake satellite and satellite information decoding; performing updating operation on extracted navigation parameters; extracting carrier phase, code phase and Doppler observation information and performing calculation on location, speed measurement and time service. According to the invention, by the design of an integrated antenna receiving the satellite signals and the fake satellite signals and a radio frequency front end and with the adoption of an algorithm realizing seamless positioning depending on independent positioning and compatible positioning for solving a problem of near-far effect of the two kinds of signals, constellation geometric structure is improved and user positioning precision is improved.

The invention comprises a computer implemented system and process for delivery status notification of an electronic message, the system and process comprising: inserting into the electronic message a request for the delivery status notification; sending the electronic message to a recipient address; receiving a data packet having the delivery status; inserting the delivery status into the electronic message; and displaying a symbolic representation of the delivery status. In one embodiment of the present invention, the data packet is an administrative data packet having no substantive content. Additionally, an embodiment of the present invention may further comprise: receiving the electronic message; identifying a request for delivery status notification in the electronic message; identifying a return address in the electronic message; determining the delivery status of the electronic message; and sending an administrative data packet to the return address, the administrative data packet having the delivery status of the electronic message.

A system for transmitting into a shared medium includes a processor, a transmitter, and a receiver. The processor is coupled to the transmitter for transmitting in a manner, at a time, and at a power level as directed by the processor. The processor determines from cooperation with the receiver the number of transmitters expected to be sharing the medium at a future time when transmitting is desired; prescribes a total power for a plurality of transmissions; and prescribes a maximum power for individual transmissions of various types. As implemented for air traffic collision avoidance, a suitable total power for MODE S interrogations transmitted by a TCAS unit on the host aircraft and a suitable power level for individual interrogation transmissions are set according to the detected number of operational TCAS in the airspace, the detected or reported number of members in a flight formation that includes the host aircraft, the altitude of the host aircraft, and the distances from the host aircraft to other members of the flight formation. Other implementations adjust receiver sensitivity, for example, increasing the minimum trigger level (MTL) for detecting interrogations and squitters. With decreased receiver sensitivity, continued use of limited transmission power levels improves system reliability and decreases interference of TCAS with other systems such as ATCRBS. Further implementations revise conventional TCAS interference limiting techniques. Transmission of broadcast messages may be conducted at reduced power or omitted.

Disclosed in this application are systems and methods for detecting unwanted electronic message transmissions at a certain location on an electronic communications network. The disclosed principles include establishing a database for storing metadata associated with message traffic according to at least the source addresses of the senders of electronic message transmissions. The disclosed principles also include monitoring electronic message transmissions at the certain location on the electronic communications network. Also, included is populating the database with metadata derived from analysis of the monitored electronic messages, where the metadata includes metadata derived by analyzing the contents of the monitored electronic messages. Based upon the populated database, it is determined whether certain received electronic messages are likely to be unwanted based on an examination of the metadata associated with the source addresses of the senders of the received electronic messages and based on the analysis of the content of monitored electronic messages at least in part without reference to a promulgated database of “signatures” of known unwanted electronic messages.

Embodiments of the present invention provide for an overall hardware and software approach to Mode-S demodulation, especially where the Mode-S signals (such as squitters) have been modulated with multiple modulation protocols. Various implementations utilize coherent phase detection, since coherently detecting phase transitions in a multiple modulated signal results in better sensitivity and improved interference rejection over non-coherent modulation techniques. Further, addressing the demodulation of multiply-modulated signals may also be approached in embodiments of the present invention as a unified demodulation system, rather than disjoint demodulation of the separately modulated protocols.

This invention provides methods for a GPS device to resolve timing errors as applicable to a AGPS navigation solution, and, in particular, to solutions involving GNSS positioning and timing with limited assistance such as indoors or in a heavily obscured location, where the time of transmit of satellite signals is not directly extractable from the navigation message data. In particular the invention concerns the reconstruction of time-of-transmit from the course acquisition code of weak signals or where assisted-GNSS are employed.