48 lines
1.8 KiB
Plaintext
48 lines
1.8 KiB
Plaintext
msc {
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hscale=2;
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ms [label="MS/BTS"], ho[label="BSC Handover FSM"], gscon[label="BSC conn FSM"], msc_[label="MSC"];
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ms note msc_ [label="inter-BSC Handover to another BSS"];
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gscon abox gscon [label="ST_ACTIVE"];
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ms => ho [label="Measurement Report"];
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ho box ho [label="Handover Decision"];
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ho box ho [label="handover_request\n(struct handover_out_req)"];
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ho note gscon [label="To make sure the conn FSM permits a handover, trigger an event:"];
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ho -> gscon [label="GSCON_EV_HANDOVER_START\ndata=handover_out_req"];
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gscon abox gscon [label="ST_HANDOVER"];
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ho <- gscon [label="handover_start\n(handover_out_req)"];
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ho box ho [label="handover_start_inter_bsc_out()"];
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ho => msc_ [label="BSSMAP Handover Required"];
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ho abox ho [label="HO_OUT_ST_WAIT_HO_COMMAND"];
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...;
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...;
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--- [label="On Timeout"];
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ho box ho [label="handover_end(fail)"];
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ho -> gscon [label="GSCON_EV_HANDOVER_END"];
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gscon abox gscon [label="ST_ACTIVE"];
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ms note gscon [label="MS happily continues on the old lchan."];
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--- [label="END: 'On Timeout'"];
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...;
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...;
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ho <= msc_ [label="BSSMAP Handover Command\n HO_OUT_EV_BSSMAP_HO_COMMAND"];
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ms <= ho [label="Forward L3 Info (RR Handover Command from new BSS)"];
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ho abox ho [label="HO_OUT_ST_WAIT_CLEAR"];
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...;
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gscon abox gscon [label="ST_HANDOVER_MO_\nWAIT_CLEAR_CMD\nT8"];
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ms <= gscon [label="RR Handover Command"];
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...;
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ho rbox gscon [label="On Timeout: same as above"];
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...;
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msc_ note msc_ [label="Remote BSS reported Handover Complete to the MSC,
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this connection has been superseded."];
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gscon <= msc_ [label="BSSMAP Clear Command\n GSCON_EV_A_CLEAR_CMD"];
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gscon abox gscon [label="ST_CLEARING"];
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gscon => msc_ [label="BSSMAP Clear Complete"];
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...;
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gscon <= msc_ [label="DISC IND\n GSCON_EV_A_DISC_IND"];
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ho abox ho [label="terminate\n(child of conn FSM)"];
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gscon abox gscon [label="terminate"];
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}
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