H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 1/18 (2006.01)
Patent
CA 2518384
A wireless local area network (WLAN) includes a first device and a second device. The first device sends a first frame including a first transmission indicator, which indicates that a service interval is to begin at a certain time. The second device sends an acknowledgement from the second device to the first device indicating receipt of the first transmission indicator. The first device sends a second frame including another first transmission indicator if, after a prescribed time period, the acknowledgement is not received by the first device. The first device also sends a last transmission indicator, which indicates that the service period will end at a certain time. The WLAN and its method of use provide synchronicity between the first and second devices as to the beginning and the end of a service period.
Un réseau local sans fil (WLAN) comprend un premier et un deuxième dispositif. Le premier dispositif transmet une première trame comprenant un indicateur de première transmission qui indique qu'un intervalle de service doit commencer à un certain moment. Le second dispositif transmet au premier dispositif un accusé de réception indiquant la réception de l'indicateur de première transmission. Si le premier dispositif ne reçoit pas un tel accusé de réception après un intervalle de temps prescrit, il transmet une seconde trame comprenant un autre indicateur de première transmission. Il transmet également un indicateur de dernière transmission qui indique que la période de service se terminera à un certain moment. Ce réseau WLAN et son procédé d'utilisation permettent d'assurer la synchronicité entre le premier et le deuxième dispositif par rapport au début et à la fin d'une période de service.
Koninklijke Philips Electronics N.v.
Smart & Biggar
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