LGW2EChapter6figures

LGW2EChapter6figures - Chapter 6 Medium Access Control...

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Chapter 6 Medium Access Control Protocols and Local Area Networks Chapter Figures
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Leon-Garcia/Widjaja Communication Networks 1 2 3 4 5 M Shared multiple access medium Figure 6.1
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Leon-Garcia/Widjaja Communication Networks Medium sharing techniques Static channelization Dynamic medium access control Scheduling Random access Figure 6.2
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Leon-Garcia/Widjaja Communication Networks Satellite channel = f in = f out Figure 6.3
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Leon-Garcia/Widjaja Communication Networks Inbound line Outbound line Host computer Stations Figure 6.4
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Leon-Garcia/Widjaja Communication Networks (a) (b) Figure 6.5
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Leon-Garcia/Widjaja Communication Networks Figure 6.6
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Leon-Garcia/Widjaja Communication Networks A transmits at t = 0 Distance d meters t prop = d / ν seconds AB B transmits before t = t prop and detects collision shortly thereafter A B A B A detects collision at t = 2 t prop Figure 6.7
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Leon-Garcia/Widjaja Communication Networks Load Transfer delay E[T]/X ρ ρ max 1 1 Figure 6.8
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Leon-Garcia/Widjaja Communication Networks Transfer Delay Load E[T]/X ρ ρ max 1 1 ρ′ max a a a > a Figure 6.9
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Leon-Garcia/Widjaja Communication Networks t t 0 t 0 -X t 0 +X t 0 +X+2t prop t 0 +X+2t prop + B Vulnerable period Time-out Backoff period B Retransmission if necessary First transmission Retransmission Figure 6.10
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Leon-Garcia/Widjaja Communication Networks 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0. 01 56 3 03 12 5 06 25 1 2 4 8 Ge -G Ge -2G G S 0.184 0.368 Figure 6.11
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Leon-Garcia/Widjaja Communication Networks t (k+1)X kX t 0 +X+2t prop + B Vulnerable period Time-out Backoff period B Retransmission if necessary t 0 +X+2t prop Figure 6.12
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Leon-Garcia/Widjaja Communication Networks A Station A begins transmission at t =0 A Station A captures channel at t = t prop Figure 6.13
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Leon-Garcia/Widjaja Communication Networks Sensing Figure 6.14
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Leon-Garcia/Widjaja Communication Networks 0 0.1 0.2 0.3 0.4 0.5 0.6 0. 02 03 06 13 25 5 1 2 4 8 16 32 64 1-Persistent CSMA 0.53 0.45 0.16 S G 0.01 0.1 1 Figure 6.15 – part 1
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