| digraph G { |
| rankdir=TB |
| labelloc=t; label="Handover FSM: Inter-BSC Incoming" |
| |
| old_bss [label="old BSS",shape=box3d] |
| msc [label="MSC",shape=box3d] |
| ho_in [label="inter-BSC HO Incoming",shape=box] |
| gscon [label="gscon FSM",shape=box3d] |
| lchan [label="lchan FSM",shape=box3d] |
| msc2 [label="msc",shape=box3d] |
| old_bsc2 [label="old BSC",shape=box3d] |
| old_lchan [label="old lchan",shape=box3d] |
| terminate [shape=octagon] |
| |
| old_bss -> msc [label="BSSMAP Handover Required",style=dotted] |
| msc -> ho_in [label="BSSMAP Handover Request",style=dotted] |
| ho_in -> gscon [label="GSCON_EV_A_CONN_IND\nBSSMAP Handover Request",style=dotted] |
| gscon -> HO_ST_WAIT_LCHAN_ACTIVE [label="handover_start_inter_bsc_in()",style=dotted] |
| HO_ST_WAIT_LCHAN_ACTIVE -> lchan [label="lchan_activate()\nFOR_HANDOVER",style=dotted] |
| lchan -> HO_ST_WAIT_LCHAN_ACTIVE [label="HO_EV_\nLCHAN_ACTIVE,\n_ERROR",style=dotted,constraint=false] |
| HO_ST_WAIT_LCHAN_ACTIVE -> HO_ST_WAIT_RR_HO_DETECT |
| |
| HO_ST_WAIT_RR_HO_DETECT -> msc2 [label="BSSMAP\nHandover\nAccept\nwith\nRR Handover\nCommand",style=dotted] |
| msc2 -> old_bsc2 -> old_lchan [label="RR Handover\nCommand",style=dotted] |
| old_lchan -> lchan [label="MS moves",style=dotted,constraint=false] |
| |
| lchan -> HO_ST_WAIT_RR_HO_DETECT [label="RR Handover\nDetect",style=dotted] |
| HO_ST_WAIT_RR_HO_DETECT -> WAIT_RR_HO_COMPLETE |
| |
| lchan -> WAIT_RR_HO_COMPLETE [label="RR Handover\nComplete",style=dotted] |
| WAIT_RR_HO_COMPLETE -> WAIT_LCHAN_ESTABLISHED |
| lchan -> WAIT_LCHAN_ESTABLISHED [label="HO_EV_LCHAN_\nESTABLISHED",style=dotted] |
| |
| WAIT_LCHAN_ESTABLISHED -> terminate [label="non-TCH"] |
| WAIT_LCHAN_ESTABLISHED -> WAIT_MGW_ENDPOINT_TO_MSC |
| WAIT_MGW_ENDPOINT_TO_MSC -> terminate [label="handover_end()"] |
| terminate -> msc2 [label="BSSMAP Handover\nComplete\n/ Failure",style=dotted,constraint=false] |
| |
| err [label="on error",shape=box,style=dashed] |
| err -> terminate [style=dashed] |
| |
| } |