| digraph G { |
| rankdir=LR |
| |
| subgraph cluster_bss_a { |
| label="BSS Alpha" |
| BTS_a0 [rank=min,label="bts 0\nARFCN=1 BSIC=1\nLAC=23 CI=5"] |
| BTS_a1 [rank=min,label="bts 1\nARFCN=2 BSIC=2\nLAC=23 CI=6"] |
| BSC_a [label="BSC Alpha"]; |
| {BTS_a0,BTS_a1} -> BSC_a [arrowhead=none,label=Abis] |
| } |
| |
| subgraph cluster_bss_b { |
| label="BSS Beta" |
| BTS_b0 [rank=min,label="bts 0\nARFCN=1 BSIC=3\nLAC=42 CI=3"] |
| BTS_b1 [rank=min,label="bts 1\nARFCN=2 BSIC=4\nLAC=42 CI=1"] |
| BSC_b [label="BSC Beta"] |
| {BTS_b0,BTS_b1} -> BSC_b [arrowhead=none,label=Abis] |
| } |
| |
| MS -> BTS_a1 [label="(3) Measurement:\nARFCN=1 BSIC=3 RXLEV"] |
| BTS_a1 -> MS [label="(1) my neighbors:\nARFCN=1"] |
| BTS_b0 -> MS [label="(2) good RXLEV\nBSIC=3",style=dotted] |
| MS -> {BTS_a0,BTS_b0,BTS_b1} [style=invisible,arrowhead=none] |
| |
| BTS_a1 -> BSC_a [label="(4) Measurement\nReport",style=dashed] |
| BTS_a1 -> BTS_b0 [label="(5) BSC decides to do\ninter-BSC Handover",style=dashed,constraint=false] |
| |
| {BSC_a,BSC_b} -> MSC [arrowhead=none,label=A] |
| |
| BSC_a -> MSC [label="(6) --> Handover Required\nto LAC=42 CI=6\n(10) <-- Handover Command",style=dashed,constraint=false,arrowhead=none] |
| MSC -> BSC_b [label="(7) <-- Handover Request\n(9) --> Handover Request ACK",style=dashed,constraint=false,arrowhead=none] |
| |
| BSC_b -> BTS_b0 [label="(8) activate new lchan",style=dashed,constraint=false] |
| |
| } |