Method of improving efficiency of radio channel usage in...

Details Method of improving efficiency of radio channel usage in... Method of improving efficiency of radio channel usage in...

H - Electricity

04

B

H04B 7/204 (2006.01) H04B 7/185 (2006.01) H04B 7/216 (2006.01) H04L 1/22 (2006.01)

Patent

CA 2238753

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.

Cette invention concerne un procédé de transmission d'un signal sur un canal de communication sans fil commun à un système primaire et un système secondaire de communication qui possèdent des zones de couverture se chevauchant au moins partiellement. Le premier système possède un cycle de fonctionnement de faible charge et transmet des salves aléatoires possédant une première durée caractéristique. Ce procédé consiste à transmettre sur le second système, des salves qui possèdent des durées supérieures ou égales à trois fois la première durée, et qui contiennent des codes de correction d'erreur sans voie de retour permettant de recouvrer les données que contiennent lesdites salves en cas de collision avec une salve du premier système. Les salves du second système possèdent une intensité suffisamment inférieure à l'intensité des salves du premier système pour éviter toute interférence avec ces dernières.

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