Method and apparatus for coordinating transfer of information between a base station and a plurality of radios
Patent 5499243 Issued on March 12, 1996. Estimated Expiration Date: March 12, 2013. 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.
To efficiently coordinate the transmission of information from a plurality of radios to a base station on the forward channel of an RF channel, transmission time on the forward channel is scheduled by the base. To be allowed to transmit information on the forward channel, a radio first sends a request frame to the base to request permission to access the forward channel. After sending the request frame, the radio waits for the base to assign it a reserved information time slot. Only if an information time slot is reserved, and only during that reserved time slot, may the radio send an information frame on the forward channel. In determining whether to reserve an information time slot for the radio, the base station takes into consideration the priority of the radio. This allows the base station to better coordinate signal activity on the forward channel. Since transmission time on the forward channel is scheduled, conflicting transmissions are minimized. Thus, forward channel capacity is used more efficiently.
Other References
Norman Abramson, "The Aloha System", Computer Communication Networks, Prentice-Hall, 1973, pp. 501-517
Norman Abramson, "The ALOHA System--Another alternative for computer communications", Fall Joint Computer Conference, 1970, pp. 281-284
R. Binder, et al., "ALOHA packet broadcasting--A retrospect", National Computer Conference, 1975, pp. 203-215
Aydano B. Carleial, et al. "Bistable Behavior of ALOHA-Type Systems", IEEE Transactions on Communications, vol. COM-23, No. 4, APr. 1975, pp. 401-410
W. Crowther et al., "A System for Broadcast Communication: Reservation-Aloha", Proceeding of the Sixth Hawaii International Conference in System Science, 1973, pp. 371-374
Leonard Kleinrock et al., "Packet-switching in a slotted satellite channel", National Computer Conference, 1973, pp. 703-710
Michael J. Ferguson, "On the Control, Stability, and Waiting time in a Slotted ALOHA Random Access System", IEEE Transaction On Communications, Nov. 1975, pp. 1306-1311
Simon S. Lam et al., "Packet Switching in a Multiaccess Broadcast Channel: Dynamic Control Procedures", IEEE Transactions on Communications, Sep. 1975, pp. 891-900
John J. Metzner, "On Improving Utilization in ALOHA Networks", IEEE Transactions on Communications, Apr. 1976, pp. 447-448
Lawrence G. Roberts, "Dynamic allocation of satellite capacity through packet reservation", National Computer Conference, 1973, pp. 711-716
Lawrence G. Roberts, "Extensions of packet communication technology to a hand held personal terminal", Spring Joint Computer Conference, 1972, pp. 295-29
March 12, 2013. 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.
