Multipoint communication system having polling and reservation schemes
Patent 4742512 Issued on May 3, 1988. Estimated Expiration Date: 
July 18, 2006. 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.
July 18, 2006. 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 References 3702008 Polling system for a duplex communications link Patent #: 4251865 InventorsAssigneeApplicationNo. 06/887003 filed on 07/18/1986US Classes:370/347Multiple access (e.g., TDMA)ExaminersPrimary: Olms, Douglas W.Assistant: Scutch, III, Frank M. Attorney, Agent or FirmInternational ClassesH04B 7/185 (20060101)H04L 12/56 (20060101) H04L 12/403 (20060101) Foreign Application Priority Data1985-07-19 JPAbstractIn a multipoint communication system, first polling signals are sequentially and respectively transmitted to terminal stations on a broadcast channel from a central station, asking a request for reservation without waiting for a reply from the terminal stations. A reservation signal is transmitted on a multiple access channel from a terminal station requesting the reservation to the central station in response to the first polling signal addressed to it. A second polling signal is then transmitted on the broadcast channel in response to the reservation signal and the multiple access channel is reserved for a period of time variable in accordance with the reservation signal. A data signal is transmitted from the terminal station requesting the reservation on the reserved multiple access channel in response to the second polling signal. | |
