Allocating radio resources is a high-stakes competition.
Who gets the lionโs share of bandwidth?
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Round Robin (RR)
- Resources are allocated equally in a cyclic manner.
- Pros: Simple.
- Cons: Ignores channel conditions, leading to low throughput.
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Max C/I (Maximum Carrier-to-Interference)
- Prioritizes users with the best channel conditions.
- Pros: Maximizes throughput by prioritizing ch conditions.
- Cons: Unfair to users in poor conditions.
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Proportional Fair (PF)
- Balances fairness and throughput using CQI/average throughput ratio.
- Pros: Maintains fairness while adapting to dynamic conditions.
- Cons: More complex than RR and Max C/I.
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Enhanced Proportional Fair (ePF)
- Builds on PF with added support for QoS.
- Pros: Excellent for VoIP and video, balances multiple factors.
- Cons: High computational complexity.
Summary:
| Scenario | RR | C/I | PF | ePF |
|---|---|---|---|---|
| Bad CQI + High Th | 1 | 1 | 4 | 4 |
| Good CQI + High Th | 3 | 3 | 2 | 2 |
| Bad CQI + Low Th | 2 | 2 | 3 | 3 |
| Good CQI + Low Th | 4 | 4 | 1 | 1 |
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