Method and apparatus for packet data transmission

Details Method and apparatus for packet data transmission Method and apparatus for packet data transmission

1996-09-11

1998-01-13

Ton, Dang

Multiplex communications

Communication over free space

Repeater

370441, 370395, 375205, H04J 1300

Patent

active

057086567

ABSTRACT:
In a packet data transmission and reception system two inactivity time intervals are used along with a variable data rate including an idle rate, a default or intermediate rate, and a peak rate. When no packet data is available the data rate is reduced to an idle rate to free most of the system capacity used for communicating the packet transmissions. The packet data service connection is thus maintained and the idle rate transmission of idle packets allows the receiving end of the channel to stay synchronized with the transmitter. If the packet data transmission resumes before the first inactivity timer expires the transmission rate returns immediately to the peak rate. However, if the inactivity continues until the first inactivity timer expires, the data rate is preferably not immediately returned to the peak rate. The packet data service connection is instead maintained at the idle rate after the first inactivity timer expires. When the second inactivity timer expires the packet data service is released. If packet data becomes available for transmission between the time the first inactivity timer expires and the second inactivity timer expires, the data packets are transmitted at the intermediate rate, which is generally lower than the peak rate. After the transmitting source receives an acknowledgment from the receiving end of the channel, the data rate switches back to the peak rate.

REFERENCES:
patent: 4597077 (1986-06-01), Nelson et al.
patent: 4679191 (1987-07-01), Nelson et al.
patent: 5257257 (1993-10-01), Chen et al.

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