Detection of stations for wireless communication

Details Detection of stations for wireless communication Detection of stations for wireless communication

H - Electricity

04

L

H04L 12/28 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2646979

Techniques for detecting other stations in a power efficient manner are described. A station may operate in a passive mode or a search mode. In the passive mode, the station receives for one receive period in each time interval. In the search mode, the station transmits for a series of transmit periods in one time interval, then receives for one receive period in the next time interval, and repeats the transmit/receive cycle. In an example scenario, station A operates in the search mode and sends a series of transmissions during its transmit periods. Station B operates in the passive mode, receives a transmission from station A during its receive period, switches to the search mode, and sends a series of transmissions for one time interval. Station A receives a transmission from station B during its receive period. After detecting one another, stations A and B may perform synchronization.

L'invention concerne des techniques permettant de détecter d'autres stations à faible consommation d'énergie. Une station peut fonctionner en mode passif ou en mode de recherche. Au mode passif, dans un certain intervalle de temps, la station reçoit pendant une période de réception. En mode de recherche, dans un certain intervalle de temps, la station transmet pendant une série de périodes de transmission, puis pendant l'intervalle de temps suivant, elle reçoit pendant une période de réception, puis la station répète le cycle transmission/réception. A titre d'exemple, la station A fonctionne en mode de recherche et envoie une série de transmissions pendant sa période de transmission. La station B fonctionne en mode passif, reçoit une transmission provenant de la station A pendant la période de réception, commute en mode de recherche et envoie une série de transmissions pendant un intervalle de temps. La station A reçoit une transmission provenant de la station B pendant sa période de réception. Après s'être détectées l'une l'autre, les stations A et B peuvent réaliser une synchronisation.

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