7/21/2019 3G-2G Handover Work Flow

1/2

PS 3G->2G

MAP/E MAP/E

2. Prepare

Handover

BSSMAP BSSMAP

4. Handover

Request Ack

RANAP RANAP

13. Iu Reease

!o"pete

BSSMAP BSSMAP

3. Handover

Request

MAP/E MAP/E

#. Prepare

Handover

Response

RANAP RANAP

$. Reocat%on

!o""and

BSSMAP BSSMAP

&. Handover

'etect

BSSMAP BSSMAP

1(. Handover

!o"pete

MAP/E MAP/E

11. Send End

S%)na

Re uest

MAP/E MAP/E

14. Send End

S%)na Response

RANAP RANAP

1. Reocat%on

Requ%red

*E Node B RN!

Serving

!N MSC BS! B+S

RR!

,.DCCH- InterSste"Handover

!o""andRR!

[Hard Handover]

RR

0. Handover !o"pete

RR

RANAP RANAP

12. Iu Reease

!o""and

7/21/2019 3G-2G Handover Work Flow

2/2

MS ne

2SSN

HRSNod

3SSN

2. Rout%n) Area *pdate Request

1(. *pdate P'P !ontet Request

1(. *pdate P'P !ontet Response

11. *pdate PRS ocat%on

1#. *pdate PRS ocat%on Ack

#. SSN !ontet Response

$. Secur%t 5unct%ons

10. Rout%n) Area *pdate Accept

12. !ance ocat%on

12. !ance ocat%on Ack

14. Insert Su6scr%6er 'ata Ack

14. Insert Su6scr%6er 'ata

,. SSN !ontet Acknoed)e

BSS SRNS

3. SSN !ontet Request

13. Iu Reease !o""and

13. Iu Reease !o"pete

&a. 5orard Packets

0. 5orard Packets

4. SRNS !ontet Request

4. SRNS !ontet Response

&. SRNS 'ata 5orard !o""and

22. BSS Packet 5o !ontet Procedure

1. Intersystem changedecision

!3

!1

2(. Rout%n) Area *pdate !o"pete

ne

MS!/7R

od

MS!/7R

1$. ocat%on *pdate Request

1,a. *pdate ocat%on

1,6. !ance ocat%on

1,c. !ance ocat%on Ack

1,d. Insert Su6scr%6er 'ata

1,e. Insert Su6scr%6er 'ata Ack

1,8. *pdate ocat%on Ack1&. ocat%on *pdate Accept

21. +MSI Reaocat%on !o"pete

!2