Cisco ASR 5000 Series - Page 197

ASN Gateway Overview
ASN Call Procedure Flows ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Figure 56. Uncontrolled Inter-ASN Gateway Handover Procedure
Serving
ASN BS
Anchor
ASN-GW
MS/SS
DATA
2
4
1
3
7
8
9
10
11
12
13
14
16
Target
ASN BS
Non-Anchor
Target ASN-GW
17
16
18
15
6
5
Table 40. Uncontrolled Inter-ASN Gateway Handover Procedure Description
Step
Description
1
MS sends RNG-REQ message to target ASN BS.
2
Target ASN BS sends Context-Request message to serving ASN BS.
3
Serving ASN BS sends Context-Report message with MS context information to target ASN BS.
4
Target ASN BS sends Context-Request message to target non-anchor ASN Gateway.
5
Target non-anchor ASN Gateway forwards Context-Request message to anchor ASN Gateway.
6
Anchor ASN Gateway sends Context-Report message with MS context information to target non-anchor ASN Gateway.