172 results about "Squitter" patented technology

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.

A method and system for archiving and / or verifying electronic communications. The method and system provide verification of an email sent by a sender to a recipient, comprising receiving a copy of an email as an addressee; indexing the email according to at least one of sender, recipient, date, or subject matter; and storing an exact copy of the email as received. The method and system also provide for secure electronic communication between a sender and at least one recipient, comprising receiving from the sender view a secure internet connection a message and the email address of at least one intended recipient of the message; sending an email message to the at least one intended recipient of the message that a message is waiting; transmitting the message to the at least one intended recipient via a secure internet connection established by the at least one intended recipient; and sending an email message to the sender that the at least one recipient has been sent the message. The method and system also provide for transmitting a facsimile for a sender to a recipient, the comprising: receiving an electronic facsimile message from the sender together with the facsimile number of the recipient; storing a copy of the electronic facsimile message; transmitting the facsimile message to the facsimile number of the recipient.