Method of improving efficiency of radio channel usage in overlapping coverage areas
First Claim
1. A method of sending data over a wireless communications channel, said communications channel being common to primary and secondary communciations systems that have at least partially overlapping areas of coverage, said primary system having a low duty cycle and transmitting random bursts having a characteristic first duration, said method comprising transmitting packets in bursts on said secondary system, said bursts on said second system having a duration at least equal to three times said first duration and said packets containing forward error correction codes to permit data contained therein to be recovered in the event of a collision with a burst on the primary system, and said bursts on the secondary system having an intensity sufficiently below the intensity of the bursts on the primary system to avoid interference therewith.
6 Assignments
0 Petitions
Accused Products
Abstract
A method is described for transmitting a signal over a wireless communications channel, the communications channel being common to primary and secondary communications systems that have at least partially overlapping areas of coverage. The primary system has a low duty cycle and transmits random bursts having a characteristic first duration. The method involves transmitting bursts on the secondary system, which have a duration at least equal to three times the first duration and contain forward error correcting codes to permit data contained therein to be recovered in the event of a collision with a burst on the primary system. The bursts on the secondary system have an intensity sufficiently below the intensity of the bursts on the primary system to avoid interference therewith.
-
Citations
18 Claims
- 1. A method of sending data over a wireless communications channel, said communications channel being common to primary and secondary communciations systems that have at least partially overlapping areas of coverage, said primary system having a low duty cycle and transmitting random bursts having a characteristic first duration, said method comprising transmitting packets in bursts on said secondary system, said bursts on said second system having a duration at least equal to three times said first duration and said packets containing forward error correction codes to permit data contained therein to be recovered in the event of a collision with a burst on the primary system, and said bursts on the secondary system having an intensity sufficiently below the intensity of the bursts on the primary system to avoid interference therewith.
- 8. A wireless communications system capable of sharing bandwidth with a primary system, said systems having at least partially overlapping areas of coverage, said primary system having a low duty cycle and transmitting random bursts having a characteristic first duration, said communications system comprising a plurality of distributed terminals for transmitting packets in bursts, said bursts on said communications system having a duration at least equal to three times said first duration, and said packets containing forward error correction codes to permit data contained therein to be recovered in the event of a collision with a burst on the primary system, and said bursts on said communications system having an intensity sufficiently below the intensity of the bursts on the primary system to avoid interference therewith.
- 15. A terminal for use in a wireless communications system capable of sharing bandwidth with a primary system, said systems having at least partially overlapping areas of coverage, said primary system having a low duty cycle and transmitting random bursts having a characteristic first duration, said terminal comprising a transmitter for transmitting packets in bursts on said communications system having a duration at least equal to three times said first duration, and said packets containing forward error correction codes to permit data contained therein to be recovered in the event of a collision with a burst on the primary system, and said bursts on said communications system having an intensity sufficiently below the intensity of the bursts on the primary system to avoid interference therewith.
Specification