A Feedback Approach for QoS-Enhanced MAC in Wireless Sensor Network

Table 2

System parameters used in simulation.

	IEEE 802.11b	IEEE 802.11a	IEEE 802.15.4
Transmitted power	30 mW	30 mW	1 mW
Ave. frame length	1500 bytes	1500 bytes	105 bytes
Data rate	11 Mbps	54 Mbps	250 kbps
Slot time	20 s	9 s	320 s
SIFS time	10 s	16 s	192 s
	31	15	7
	1023	1023	31