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Дата изменения: Wed Mar 9 18:48:51 2016
Дата индексирования: Sat Apr 9 22:35:53 2016
Кодировка:

Sliding Window

SW #1
· A B , 6 , ( 3) go-back-N. 4- , A, ( ACK' B ). A B?

· :
Sender Window Size Last ACK Received Last Segment Sent

· :
Receiver Window Size Largest Acceptable Segment Last Segment Received -

SW #1
1

Sender: SWS = 3 LAR = 0 LSS = 1

Receiver: RWS = 1 LAS = 1 LSR = 0

SW #1
1 2

Sender: SWS = 3 LAR = 0 LSS = 2

Receiver: RWS = 1 LAS = 1 LSR = 0

SW #1
1 2 3

Sender: SWS = 3 LAR = 0 LSS = 3

Receiver: RWS = 1 LAS = 1 LSR = 0

SW #1
1 2 3

Sender: SWS = 3 LAR = 0 LSS = 3

A1

Receiver: RWS = 1 LAS = 2 LSR = 1

SW #1
1 2 3

Sender: SWS = 3 LAR = 0 LSS = 3

A1 A2

Receiver: RWS = 1 LAS = 3 LSR = 2

SW #1
1 2 3

Sender: SWS = 3 LAR = 0 LSS = 3

A1 A2 A3

Receiver: RWS = 1 LAS = 4 LSR = 3

SW #1
1 2 3

Sender: SWS = 3 LAR = 1 LSS = 4

A1 A2 A3 4

Receiver: RWS = 1 LAS = 4 LSR = 3

SW #1
1 2 3

Sender: SWS = 3 LAR = 2 LSS = 5

A1 A2 A3 4 5

Receiver: RWS = 1 LAS = 4 LSR = 3

SW #1
1 2 3

Sender: SWS = 3 LAR = 3 LSS = 6

A1 A2 A3 4 5 6

Receiver: RWS = 1 LAS = 4 LSR = 3

SW #1
1 2 3

Sender: SWS = 3 LAR = 3 LSS = 6

A1 A2 A3 4 5 6

Receiver: RWS = 1 LAS = 4 LSR = 3 X

SW #1
1 2 3

Sender: SWS = 3 LAR = 3 LSS = 6

A1 A2 A3 4 5 6 A3

Receiver: RWS = 1 LAS = 4 LSR = 3 X
X

SW #1
1 2 3

Sender: SWS = 3 LAR = 3 LSS = 6

A1 A2 A3 4 5 6 A3 A3

Receiver: RWS = 1 LAS = 4 LSR = 3 X
X X

SW #1
1 2 3

Sender: SWS = 3 LAR = 3 LSS = 6 Timeout for 4

A1 A2 A3 4 5 6 A3 A3 4

Receiver: RWS = 1 LAS = 4 LSR = 3 X
X X

SW #1
1 2 3

Sender: SWS = 3 LAR = 3 LSS = 6 Timeout for 4

A1 A2 A3 4 5 6 A3 A3 4 5

Receiver: RWS = 1 LAS = 4 LSR = 3 X
X X

SW #1
1 2 3

Sender: SWS = 3 LAR = 3 LSS = 6 Timeout for 4

A1 A2 A3 4 5 6 A3 A3 4 5 6

Receiver: RWS = 1 LAS = 4 LSR = 3 X
X X

SW #1
1 2 3

Sender: SWS = 3 LAR = 6 LSS = 6 Timeout for 4

A1 A2 A3 4 5 6 A3 A3 4 5 6 A4 A5 A6

Receiver: RWS = 1 LAS = 7 LSR = 6 X
X X

SW #1
1 2 3

Sender: SWS = 3 LAR = 6 LSS = 6 Timeout for 4

A1 A2 A3 4 5 6 A3 A3 4 5 6 A4 A5 A6

Receiver: RWS = 1 LAS = 7 LSR = 6 X
X X

: 9

SW #2
· A B , 6 , ( 4) go-back-N. 3- , A, ( ACK' B ). A B?

SW #3
· A 16 B SW. RTT = 100 , 50 . ?

SW #3
· p = 16 * 8 = 128 . · 1 RTT . , 50 128 = = 64 / -3 100 10

SW #4
· A 32 B SW. RTT = 80 , 128 /. ?