Research Article
QoS and QoE Aware N-Screen Multicast Service
Table 2
Comparison of N-Screen multicast with unicast and multicast schemes.
| | Device ID |
Screen size | QoE requirements |
ABW (Kbps) | PLR | Unicast |
Bit rate based multicast scheme |
Proposed N-Screen multicast | | MOS | MOS |
Grouping | MOS | Grouping |
| | D-1 | 2.1′′ | MOS > 2.5 | 300 | 0.6 | 3.48 | 3 | Transmit at base rate (200) to all users but cannot ensure the visual quality requirements of all users | 3 | MG1: base rate (200) | | D-2 | 4.2′′ | MOS > 2 | 500 | 0 | 3.48 | 2.11 | 2.11 | | D-3 | 2.1′′ | MOS > 2.5 | 200 | 0 | 3.18 | 3.18 | 3.18 | | D-4 | 9.2′′ | MOS > 2 | 500 | 0 | 2.25 | 1.73 | 2.18 | MG2: base rate (450) | | D-5 | 4.2′′ | MOS > 2 | 450 | 2 | 2.46 | 1.77 | 2.46 |
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