Suppose that all sensor nodes are in normal situation till the [k.sup.th] superframe
where the emergency condition occurs.
In beacon enabled mode, coordinator starts the superframe
that consists of a beacon, an active period, and an inactive period, as shown in Fig.
Section 3 describes basic assumptions and a superframe
Also, PAN has a superframe
structure which consists of active part and inactive part.
After calculating the optimal [CW.sub.max], the AP broadcasts the beacon frame, including the optimal [CW.sub.max], at the start time of the superframe
. Then, all stations receiving the beacon frame use this information to set their maximum contention window size to the optimal value.
can have an active and an inactive portion.
, an ISA100.11a system was studied, where the effects of the time slot duration, superframe
period, and back-off exponent on various packet-level measures such as throughput, average delay, and energy consumption were evaluated.
When people are not on a call, Portal's "Superframe
" can display favourite photos and videos and important notifications like birthday reminders .
Portal also has a feature called Superframe
, that can display a user's photos, videos and notifications like birthday reminders on the display.
This is due to limited 16 channels in IEEE 802.15.4 MAC, which is not feasible for N heterogeneous nature of a patient's data.The limitations in CSMA/CA reduces performance of the MAC Superframe
structure in terms of a higher data collision.
The IEEE 802.15.4 standard superframe
layout has the inactive span and an active span.
The protocol in cluster-tree mode uses superframe
structure (Figure 2), where a TDMA-based period is used for guaranteed access, while a contention-based period is used for nonguaranteed access.