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US 2006/0077933 A1Published application
Method for improving handovers in a WLAN
AssigneeAlcatel
InventorsMarceau Coupechoux, Lionel Fiat
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AssigneeAlcatel
InventorsMarceau Coupechoux, Lionel Fiat
Estimating the term…
The present invention concerns a method for improving the handover procedure between two WLAN cells (C1 and C2) based on IEEE 802.11 standard and working at two different frequencies (f1 and f2), said method comprising the step of performing measurement(s) on the second frequency (f2) in order to verify the necessity or the opportunity to realise a handover, the first frequency (f1) being currently used to transmit data, method characterised in that it consists more precisely in: first sending at least one dummy or fake data or control frame on said first frequency (f1) which is currently used for transmitting data, said data or control frame comprising a duration data with a value at least equal to the time needed to perform said measurement(s) at said second frequency (f2), and, then performing said measurement(s) on said second frequency (f2) for a time period corresponding at the most to the value of the duration data set in the sent dummy or fake data or control frame, while any terminal, station, access point or similar entity of the concerned WLAN is forbidden or disabled to send or transmit any data on said first frequency (f1) during a time period corresponding to said duration data value.
Method for improving the handover procedure between two WLAN cells based on IEEE 802.11 standard and working at two different frequencies, said method comprising the step of performing measurement(s) on the second frequency in order to verify the necessity or the opportunity to realise a handover, the first frequency being currently used to transmit data, method wherein it comprises more precisely:
Access point of a wireless local area network (WLAN) based on IEEE 802.11 standard, with a first frequency channel for transmitting data or control frames and able to switch to at least a second frequency channel for performing measurement(s), said access point currently using said first frequency to transmit data or control frames and comprising means for performing measurement(s) on the second frequency, wherein it comprises more precisely:
Terminal, in particular mobile terminal, adapted for use in a wireless local area network (WLAN) based on IEEE 802.11 standard, with a first frequency channel and at least a second frequency channel for transmitting data or control frames, said terminal currently using said first frequency to transmit data or control frames and comprising means for performing measurement(s) on the second frequency, wherein it comprises more precisely:
Dependencies are inferred from the claim text.