Introduction(cont.)
Conventional priority-based schemes:
- The Conventional Guard Channel Scheme (CGC)
- New calls can’t use the guard channels
- Second-best Pfct performance
- Low complexity
- Queueing Priority (QP) scheme:
- New call are blocked when there are no free channels available
- If all channel are occupied, handoff calls are queued according to various queueing disciplines
- The Subrating Scheme (SRS) :
- Certain channels are allowed to be temporarily divided into two channels at half the original rate to accommodate handoff calls.
- Best Pfct performance
- High complexity