Multiple access simplex mode communication systems and methods therefor
Patent 5982742 Issued on November 9, 1999. Estimated Expiration Date: 
December 5, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 5, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPosition coded pulse train Digital remote control method Infrared transmitter and receiver and method Method of avoiding signal interference among a plurality of remote control signals Method for transmitting signals from a plurality of transmitting units and receiving the signals Patent #: 5870381 InventorsAssigneeApplicationNo. 985857 filed on 12/05/1997US Classes:370/213, PULSE POSITION MODULATION370/345, Combining or distributing information via time channels375/138Time hoppingExaminersPrimary: Nguyen, ChauAssistant: Vanderpuye, Kenneth Attorney, Agent or FirmInternational ClassH04J 003/10AbstractAn asynchronous time-hopping multiple access "(ATHMA") protocol and a simplex mode communication system utilizing the same requires no synchronization between transmitting stations, no handshaking between transmitters and receivers and no system manager to coordinate data message transmission. The ATHMA protocol ensures that for an n-channel asynchronous simplex mode communication system, each transmitter repeatedly sends each unique data message n successive times according to its own time-hopping schedule. In the preferred embodiment the time-hopping schedules are coordinated such that at least one duplication of each unique message will not collide with any other messages over a given period. Thus, at most n-1 transmissions out of the total n transmissions of each unique data message will be collided and lost. The ATHMA protocol and communication system of the present invention is ideally suited for applications requiring a low throughput rate and channel capacity. The ATHMA protocol can be applied to various transmissions media such as radio, infrared optics and wired media with little or no modification.Field of SearchPlural part (e.g., digit) or repetitionsPulse width PULSE POSITION MODULATION CROSSTALK SUPPRESSION Messages addressed to multiple destinations Polling Combining or distributing information via time channels Combining or distributing information via time channels Combining or distributing information via time channels Pulse width and pulse position modulation | |
