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Dst. Dst. Dst. Dst. Cost. Cost. Cost. Cost. Next. Next. Next. Next. B. A. A. A. 1. 2. B. A. B. B. B. C. 2. 2. C. B. B. A. D. C. C. D. 2. 3. D. E. C. E. E. D. E. 2. 1. E. F. E. F. F. F. 2. 1. F. E. E. D. F. 5. 1. 2. B. A. 2. C. 1. 2.

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  1. Dst Dst Dst Dst Cost Cost Cost Cost Next Next Next Next B A A A 1 2 B A B B B C 2 2 C B B A D C C D 2 3 D E C E E D E 2 1 E F E F F F 2 1 F E E D F

  2. 5 1 2 B A 2 C 1 2 E G 1 1 6 D 3 F Step Set S D(A), p(A) D(B), p(B) D(D), p(D) D(E), p(E) D(F), p(F) D(G), F(G) 0 C 5, C 2, C ∞ ∞ 6, C 1, G 1 CG 3, G 2 BCG 3 ABCG 5, A 4 ABCDG 6, D 5 ABCDEG 6 ABCDEFG

  3. 5 1 2 B A 2 C 1 2 E G 1 1 6 D 3 F Step Set S D(A), p(A) D(B), p(B) D(D), p(D) D(E), p(E) D(F), p(F) D(G), F(G) 0 C 5, C 2, C ∞ ∞ 6, C 1, G 1 2 3 4 5 6

  4. Dst Dst Cost Cost Next Next A B 2 1 A B B C 2 2 B C 1 2 B D D 3 2 E D A E E 2 1 F E 2 C F F 1 2 E F 2 E 1 2 1 D 1 Dst Cost Next F A 4 C/F Dst Cost Next B 4 C/F A 3 E C 2 C/F B 3 C E 2 F C 1 D F 1 F D 1 D E 1 E

  5. A 100Kbps, 2ms 1Mbps C D 200Kbps, 1ms B I (ms) I (ms) 5 5 4 4 T -1.2 3 3 2 2 1 1 0 0 T (ms) 5 5 1 2 3 1 4 2 3.2 4 -1 -1 -1.2 -2 -2 T (ms)

  6. a (ms) 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 t (ms) -1 -2 -3 time = 0 600 bits 100Kbps, 2ms A 500Kbps C D time = T 1000 bits 0 200Kbps, 1ms T B 2 t+1 6 T+5 t+6 t+6+d 8 t+8 t+8+d t+9.2 t+9.2+d 0 0 2 2 t t t+1 t+1 6 6 8 t+5 8 t+5 8+d 8+d 9.2+d t+6 9.2+d t+6 11.2+d t+9.2+d

  7. 600 bits time = 0 100Kbps, 2ms A 500Kbps D C time = T 1000 bits 200Kbps, 1ms B (a) T+6 <= 8 (b) 8 < T+6 <= 9.2 (c) 9.2 < T+6 0 0 0 T 2 T+1 2 2 T T T+1 T+1 6 6 6 T+5 T+6 T+5 8 8 T+6+d 8 8+d T+5 8+d T+8 T+8+d T+6 9.2+d 9.2+d T+9.2 T+9.2+d T+6 9.2 11.2+d T+8+d I = T+8+d – (T+9.2+d) = -1.2ms I = 11.2+d – (9.2+d) = 2ms I = T+8+d – (9.2+d) = T-1.2 ms

  8. 600 bits time = 0 100Kbps, 2ms A 500Kbps D C time = T 1000 bits 200Kbps, 1ms B (b) (c) (a) T+6 <= 8 A B C A B C A B C 0 T 2 T+1 6 T+5 T+6 8 time

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