VLR

1
gateway/home
BS
MSC
VLR
HLR
MSC
MS
2
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
3
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
4
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
5
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
6
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
ACK(MSRN)
7
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
ACK(MSRN)
SS7 Call Setup
IAM
8
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
ACK(MSRN)
SS7 Call Setup
IAM
Paging Request
9
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
ACK(MSRN)
SS7 Call Setup
IAM
Paging Request
Page
10
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
ACK(MSRN)
SS7 Call Setup
IAM
Paging Request
Page
Page rsp
11
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
ACK(MSRN)
SS7 Call Setup
IAM
Paging Request
Page
Page rsp
Page rsp
12
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
ACK(MSRN)
SS7 Call Setup
IAM
Paging Request
Page
Page rsp
Page rsp
ASSIGNMENT
13
gateway/home
BS
MSC
VLR
HLR
MSC
MS
IAM(ISUP)
Send Routing Info
Provide Roaming
ACK(MSRN)
ACK(MSRN)
SS7 Call Setup
IAM
Paging Request
Page
Page rsp
Page rsp
ASSIGNMENT
Channel Assignment