Table 2 The notations in the CHs selection phase.
Notation | Purpose |
|---|---|
CH | Cluster head. |
C | Set of the cluster heads. |
m | Count of CHs. |
\(s_i\) | Set of SNs. |
N | Count of SNs. |
BS | Base station or the sink. |
\(R_{max}\) | CH maximum communication range. |
R | SN maximum communication range. |
\(TH_{E}\) | Threshold energy for being a CH. |
\(E_{CH_j}\) | Energy value for a cluster head j. |
\(\alpha\) | Control factor. |
