Table 1 Current AP selection schemes
Indicator | Layer | Gathering method | Advantage | Disadvantage |
|---|---|---|---|---|
SNR | Physical | Listen or scan by MN | Fast, stable connection; easy to implement | Load imbalance |
Channel influence | Physical | Listen or scan by MN | Reduce influence | Load imbalance |
Channel utilization | Physical | By APs | Load balancing accurate | Hardware support |
Channel utilization | Physical | By MNs | Load balancing | Additional time Inaccurate |
Frame Error Rate | Data-Link | By MNs or APs | Faster than application layer QoS estimation | Inaccurate |
Transmission rate | Data-Link | By MNs or APs | Faster than application layer QoS estimation | Inaccurate |
MPD | Data-Link | By MNs or APs | Load balancing | Additional time |
Throughput | Network | By MNs or APs | Accurate | Additional time |
User count | N/A | By APs | Load balancing | Additional time |
PHTE | N/A | By MNs | Collision prevention | Additional time Hardware support |
Moving direction | N/A | Bby MNs | Appropriate AP choice | Extra data collection |
Link cost | N/A | User assisted | Reduce cost | Extra data collection |
Service provision | N/A | User assisted | Service-based support | Extra data collection |
Access technology | N/A | By MNs | Support high speed movement | Additional time |