Research Article
Energy Efficient Downlink Transmission in Wireless LANs by Using Low-Power Wake-Up Radio
Table 1
Main notations for the analysis.
| | Time length of a DIFS | | Time length of an SIFS | | Time length of an EIFS | | Time length of a wake-up message | | Time length of a CTS frame | | Time length of a DATA frame | | Time length of an ACK frame |
| | Power consumption at transmission state (1 watt) | | Power consumption at receiving state (1 watt) | | Power consumption at idle state (1 watt) | | Power consumption of WuR (1 mill-watt) |
| | Time length of a contention slot | | Amount of slots in a contention window | | Amount of slots corresponding to wake-up period | | Amount of slots corresponding to sleep period | | Number of nodes participating in the contention | | Number of nodes with packets ready | | Number of combinations choosing out of elements |
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