Parameter Value AMR voice codec rate 12.2 kbps Voice call length 60 s Voice activity factor 50% Mean of active period duration 2 s Mean of silence period duration 2 s Voice/SID packet size 40 bytes/15 bytes Voice/SID packet interarrival time 20 ms/160 ms.
The duty-cycle is derived as the ratio between the length of an active period, and the length of a cycle time, and can be calculated as (6).
Sleep efficiency (actual sleep time divided by time in bed), sleep latency, actual sleep time (assumed sleep minus wake time), actual wake time, mean score in active periods, mean length of immobility, the movement and fragmentation index, bedtime and get-up time were analyzed with the software provided by the manufacturer (The Actiwatch Sleep Analysis 2001 software).
The system operates regularly over time intervals called frames, while each frame begins with a fixed-length active period and ends with a variable-length idle period.
Compared with others, the active period of Mtr6 (10 full-length copies) and Mtr76 (17 full-length copies) was relatively long [see Additional file 6].
Beacon interval (BI) defines the superframe length and superframe duration (SD) presents the length of active period.
SABTS obtains higher probability of successful transmission arriving at the PAN coordinator than that of IEEE 802.15.4 standard because the length of active period and the beacon transmission time are managed appropriately.
while the length of the active period is (5).
This output is further affected by the length of the active period (which is dictated by the duty cycle, to be discussed later).
A minority of patients reported an increase in the length of the active period (n = 4/42, 9.5%), the number of attacks/day (n = 4/42, 9.5%), and the intensity of the attack (n = 4/42, 9.5%).
