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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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Presentation Transcript
slide2

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

slide3

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

slide4

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

slide5

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

slide6

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)

slide7

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

slide8

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

slide9

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