| msc { |
| hscale="3", wordwraparcs="1"; |
| ue,hnb,hnbgw,sgsn,ggsn; |
| |
| ue box hnb [ label = "Radio Channel Establishment, possibly already done by IMSI ATTACH / RAU" ]; |
| ue => hnb [ label = "RRC (SM PDP CTX ACT REQ)" ]; |
| hnb => hnbgw [ label = "RUA DT (RANAP DirectTransfer (SM PDP CTX ACT REQ))" ]; |
| hnbgw => sgsn [ label = "SCCP DT1 (RANAP DirectTransfer (SM PDP CTX ACT REQ))" ]; |
| |
| sgsn => ggsn [ label = "GTP-C PDP CTX ACT REQ" ]; |
| ggsn >> sgsn [ label = "GTP-C PDP CTX ACT ACK (IP+TEI of GGSN)" ]; |
| |
| sgsn => hnbgw [ label = "SCCP DT1 (RANAP Activate RAB Req (IP+TEI of GGSN)" ]; |
| hnbgw => hnb [ label = "RUA DT (RANAP Activate RAB Req (IP+TEI of GGSN)" ]; |
| hnb box ue [ label = "RAB Establishment" ]; |
| hnb >> hnbgw [ label = "RUA DT (RANAP Activate RAB Resp (IP + TEI of HNB)" ]; |
| hnbgw >> sgsn [ label = "SCCP DT1 (RANAP Activate RAB Resp (IP + TEI of HNB)" ]; |
| |
| sgsn => ggsn [ label = "GTP-C PDP CTX MOD REQ (IP + TEI of HNB)" ]; |
| ggsn >> sgsn [ label = "GTP-C PDP CTX MOD RESP" ]; |
| |
| sgsn >> hnbgw [ label = "SCCP DT1 (RANAP DirectTransfer (SM PDP CTX ACT ACK))" ]; |
| hnbgw >> hnb [ label = "RUA DT (RANAP DirectTransfer (SM PDP CTX ACT ACK))" ]; |
| hnb >> ue [ label = "RRC (SM PDP CTX ACT ACK))" ]; |
| } |