| 摘要 |
A system (e.g., an AP or a STA) in a WLAN comprises slot information (e.g., slot association or slot bias information); a counter for counting slot numbers; and a medium access controller operative to monitor a wireless medium and to initiate transmission of a MAC frame during a current slot based on a distributed wireless access protocol (e.g., DCF or EDCA), on a current slot number (t) corresponding to the current slot as counted by the counter, and on the slot information. The medium access controller may initiate frame transmission when a backoff counter is zero and when t mod N=n<SUB>i </SUB>(such that N=number of STAs, and n<SUB>i</SUB>=assigned slot number). Alternatively, the medium access controller may initiate frame transmission when a backoff counter is zero and when a slot bias mechanism effecting a probability of access to the wireless medium is satisfied.
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