MOC and MTC Call Flow

1. Mobile Original Call Flow

MSC

BSC

BTS

4

11 14 15 19 20 23

Channel Required

3

Channel Activation

Immediate Assigment Command

Authentication Request

12 13

Authentication Reponse Ciphering Mode Command

16

TMSI Reallocation Command TMSI Reallocation Complete Setup

26

Call Proceeding

28

Assignment Request

29 30

44

21

TMSI Reallocation Command(SDCCH)

22

TMSI Reallocation Complete(SDCCH)

24

Setup(SDCCH)

27

Call Proceeding(SDCCH)

Channel Activation

46

49

Release

52

Release Complete

53

Clear Command

Clear Complete

62

SCCP Release

63

SCCP Release Ack

32

SABM(FACCH)

34

UA(FACCH)

Assignment Complete(FACCH)

RF Channel Release

Alerting(SDCCH)

42

Connect(SDCCH)

43

Connect Ack(FACCH)

Disconnect(FACCH)

50

Release(FACCH)

51

Release Complete(FACCH)

54

Channel Release(FACCH)

Deactivate SACCH

58

Release Indication

59

RF Channel Release

60

Measurement Report(SACCH)

45

Measurement Report 47

55

61

Assignment Command(SDCCH)

40

Connect Ack

Disconnect

Ciphering Mode Command(SDCCH)

RF Channel Release Ack

38

Connect

48

17

Ciphering Mode Complete(SDCCH)

35 37

41

Authentication Reponse(SDCCH)

Establish Indication

Assignment Complete

Alerting

UA(SDCCH)

Channel Activation Ack

33

39

10

18

31

36

Immediate Assigment (AGCH)

CM Service Request(SDCCH)

Authentication Request(SDCCH)

Ciphering Mode Command

Ciphering Mode Complete

25

6 7

8 CM Service Request Estableish Indication

CM Service Request

Channel Request(RACH)

1

Channel Activation Ack

5 9

2

MS

RF Channel Release Ack

56

DISC(FACCH)

57

UA(SACCH)

2. Mobile Terminal Call Flow MSC

BSC 1

BTS

MS

Paging 2

Paging Command 3

7

14 17 18 22 23 26

Paging Response

Channel Required

6

Channel Activation

Channel Activation Ack

8 12

Immediate Assigment Command 11

15 16

Authentication Reponse 19

TMSI Reallocation Command TMSI Reallocation Complete 27 Setup Call Comfirm

31

Assignment Request

32

24

TMSI Reallocation Command(SDCCH)

40

Channel Activation

Disconnect

52

Release

55

Release Complete

56

Clear Command

Clear Complete

65

SCCP Release

66

SCCP Release Ack

35

SABM(FACCH)

37

UA(FACCH)

Assignment Complete(FACCH)

RF Channel Release

44

Connect(SDCCH)

47

Connect Ack(FACCH)

Disconnect(FACCH)

53

Release(FACCH)

54

Release Complete(FACCH)

57

Channel Release(FACCH)

Deactivate SACCH

61

Release Indication

62

RF Channel Release

63

Measurement Report(SACCH)

48

Measurement Report 50

58

64

Assignment Command(SDCCH)

RF Channel Release Ack 42 Alerting(SDCCH)

49 51

Setup(SDCCH) Call Comfirm(SDCCH)

38 41

Connect Connect Ack

TMSI Reallocation Complete(SDCCH)

Establish Indication

Assignment Complete

45 46

Ciphering Mode Command(SDCCH)

Channel Activation Ack

36

Alerting

20

Ciphering Mode Complete(SDCCH)

34

43

UA(SDCCH)

Authentication Reponse(SDCCH)

28 29

33

39

13

21

25

Immediate Assigment (AGCH)

SABM Paging Response(SDCCH)

Authentication Request(SDCCH)

Ciphering Mode Command

Ciphering Mode Complete

30

9 10

Paging Response(SDCCH) Establish Indication

Authentication Request

Ciphering Mode Command

Channel Request(RACH)

4

5

Paging Request

RF Channel Release Ack

59

DISC(FACCH)

60

UA(SACCH)

3. Location Update Flow

MSC

BSC

BTS

4 5 9

Location Update Request

11

Identity Request

14

Identity Reponse

15 18

2

Channel Required

3

Channel Activation

Immediate Assigment Command 8

23

Ciphering Mode Complete

24

Location Update Accepted

27

TMSI Reallocation Complete 28

20

Clear Complete

37

SCCP Release

38

SCCP Release Ack

7

12

Identity Request(SDCCH)

13

Identity Reponse(SDCCH)

16

Authentication Request(SDCCH)

17

Authentication Reponse(SDCCH)

22

Ciphering Mode Command(SDCCH)

Location Update Accepted

26 29

21

UA(SDCCH)

Ciphering Mode Complete(SDCCH)

25

TMSI Reallocation Complete Channel Release(SDCCH)

30

Deactivate SACCH

33

Release Indication

34

RF Channel Release

35

Location Update Request 10

Ciphering Mode Command

Clear Command

36

6 Immediate Assigment (AGCH)

Location Update Request Establish Indication

Authentication Reponse Ciphering Mode Command

Channel Request(RACH)

1

Channel Activation Ack

Authentication Request

19

MS

RF Channel Release Ack

31

DISC(SDCCH)

32

UA(SDCCH)

4. Intra-Cell Handover flow

MSC

BSC

BTS 2

Measurement Report(SACCH)

Channel Activation

Channel Activation Ack

5

Assigment Command(FACCH) Establish Indication

7

9 11

1

Measurement Report 3

4

MS

12 13

SABM(FACCH)

8

UA(FACCH)

Assignment Complete(FACCH) 10

HO Performed

6

RF Channel Release RF Channel Release Ack

Receiver Ready(FACCH)

5. Inter-Cell Handover flow MSC

BTS2

BSC

BTS1 2

3 4

Measurement Report

1

Measurement Report(SACCH)

6

Handover Command(FACCH)

Channel Activation

Channel Activation Ack 5 7

8

Handover Command

HO Access(FACCH) Handover Detect

9

Physical Info(FACCH)

10 11 Establish Indication 12

SABM(FACCH)

UA(FACCH)

13

Handover Complete(FACCH)

14

Receiver Ready(FACCH)

15 16

MS

Hondover Complete HO Performed

17 18

RF Channel Release RF Channel Release Ack

6. External Handover Flow MSC

BSC2

BTS2

3 HO Request

7

HO_Req Ack

5 6

BTS1 2

HO Required

4

8

BSC1

MS 1

Measurement Report

Channel Activation Channel Activation Ack

Handover Command 9 10

12

HO Detection

11

Handover Command(FACCH)

HO Access(FACCH)

Handover Detect 13

Physical Info(FACCH)

14

SABM(FACCH)

16

UA(FACCH)

15 Establish Indication

19 20 21

17

Handover Complete(FACCH)

18

Receiver Ready(FACCH)

Hondover Complete

HO Complete Clear Command 22 23

24

Clear Complete

RF Channel Release RF Channel Release Ack

Measurement Report(SACCH)