Research Article

Integration and Analysis of Neighbor Discovery and Link Quality Estimation in Wireless Sensor Networks

Table 1

Simulation parameters.

Radio

Transmission power (dBm) 0
Average noise power (dBm) −106
Switch to TX/RX (μs) 250
Radio sampling (μs) 350
Evaluate radio sample (μs) 100
Modulation NC-FSK
Encoding Manchester
Baud rate 38400
Radio speed after encoding (bits/second) 19200
Transmission power variations 1.1
Noise floor variations 0.9
Reference distance ( ) (m) 1
PL ( ) (dB) 55
Current consumption in transmit mode (mA) 16.5
Current consumption in receive mode (mA) 9.6
Current consumption in idle mode (mA) 9.6
Current consumption in sleep mode (mA) 0.0000002
Battery capacity (mAh) 2500

Environment

Path loss exponent (indoor/outdoor) 3.3/4.7
Multipath channel variations (indoor/outdoor) 5.5/3.2

MAC

Initial backoff (slots) 256
Congestion backoff (slots) 128
Carrier sensing threshold CCA

Packet format

Preamble size (byte) 10
MAC header size (byte) 5
Payload size (byte) 29
CRC size (byte) 2