SIP Signalling Delay in 3GPP - home of alexander kist

Download PDF
12 downloads 3768 Views 942KB Size Report
Comment
Reservation. UE1 (UAC). Proxies. INVITE ... S-CSCF. P-CSCF. UE1. I-CSCF. S-CSCF. I-CSCF. P-CSCF. UE2. Domain A. Domain B. Domain C. Domain D l2 l3.
UE1 (UAC)

Proxies

UE2 (UAS)

INVITE 100

INVITE 183 w/SDP

183 w/SDP PRACK

Reservation PRACK

Reservation

200 OK (of PRACK) 200 OK (of PRACK)

UPDATE UPDATE 200 OK (of UPDATE) 200 OK (of UPDATE)

User Alerted

180 Ringing

180 Ringing PRACK PRACK 200 OK (of PRACK) 200 OK (of PRACK)

200 Ok

200 Ok ACK ACK

User Picks-Up

I-CSCF

I-CSCF P-CSCF UE1

I-CSCF

l2

l1

S-CSCF

l3

Domain A

Domain B

P-CSCF

l6

l4 S-CSCF

l5

Domain C

l7

l8 UE2

Domain D

Domain B

Domain A 1`

Domain C

Domain D

60

Delay[ms]

00 40

28 28

20 60

27

27

80

26

40

00 26

26

60

25

20

25

80

24

40

24

00

24

60

20 23

23

80

22

40

22

00

22

60

21

20

21

80

40

20

20

00

60

20

19

20

19

80

18

40

18

00

18

17

20

17

80

16

40

00

60

16

16

15

Frequency

20

40

00 28

28

60

27

27

40 26 80

00

60 26

26

25

20

80 25

24

40

00 24

24

60

20

80 23

23

22

40

00 22

22

60

20 21

21

80

40 20

20

60 20 00

19

80 19 20

40 18

18

00

60

18

17

20

80

17

16

40

00

16

16

60

15

Frequency 1000

800 1371

600

400

(a)

200

0

Delay[ms]

1000

800

600

400

200

(b)

0