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3.13. Which of the following statements are correct for the “super-frame” structure in IEEE 802.11 ?
下列關於IEEE 802.11超級訊框(super frame)結構的敘述是正確的?
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| (a) All super frames have the same size. 所有超級訊框都同樣大小 | |
| (b) Super frames may have different sizes. 超級訊框可能大小不同 | |
| (c) A contention-free burst occurs at the beginning, followed by a contention period. 先有一段免競爭式的叢發性流量,隨後是競爭週期 (contention period) | |
| (d) A contention period occurs at the beginning, followed by a contention-free burst. 先有一段競爭式的叢發性流量,隨後是免競爭週期 (contention-free period) | |
| (e) The length of the contention-free burst in each super frame is fixed. 每個超級訊框中免競爭流量的長度都是固定的 |