61 lines
2.8 KiB
Plaintext
61 lines
2.8 KiB
Plaintext
msc {
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hscale = "1.5";
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phy,bts,pcu,bsc;
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bts => bsc [ label = "RSL Chan Requested" ];
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phy box bsc [ label = "TS is in PDCH mode, deactivate" ];
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bsc => bts [ label = "RSL RF Channel Release (PDCH)" ];
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bts => pcu [ label = "Info Ind (Deactivate)" ];
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pcu => bts [ label = "Chan Deactivate request" ];
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bts => phy [ label = "L1 chan Deactivate PDTCH SAPIs" ];
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phy -> bts [ label = "L1 chan Deactivate SAPIs confirm" ];
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bts -> bsc [ label = "RSL RF Channel Release Ack (PDCH)" ];
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phy box bsc [ label = "Activate TCH/H" ];
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bsc => bts [ label = "RSL Channel Activation (TCH/H)" ];
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--- [ label = "BTS notices: chan still connected as PDTCH, reconnect" ];
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bts => phy [ label = "L1 chan Disconnect PDTCH" ];
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phy -> bts [ label = "L1 chan Disconnect confirm" ];
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bts => phy [ label = "L1 chan Connect TCH/H" ];
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phy -> bts [ label = "L1 chan Connect confirm" ];
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--- [ label = "chan reconnect as TCH/H complete" ];
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bts => phy [ label = "L1 chan Activate SAPIs" ];
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bts -> bsc [ label = "RSL Channel Activation Ack (TCH/H)" ];
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--- [ label = "Voice call 1 commences..." ];
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phy box bsc [ label = "A second voice call is requested" ];
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bts => bsc [ label = "RSL Chan Requested" ];
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phy box bsc [ label = "BSC finds second slot on dynamic TS in TCH/H mode" ];
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bsc => bts [ label = "RSL Channel Activation (TCH/H)" ];
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bts => phy [ label = "L1 chan Activate SAPIs" ];
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bts -> bsc [ label = "RSL Channel Activation Ack (TCH/H)" ];
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--- [ label = "Voice call 2 commences..." ];
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--- [ label = "...Voice call 1 ends" ];
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bts => bsc [ label = "Release Ind" ];
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bsc => bts [ label = "RSL RF Channel Release (TCH/H)" ];
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bts => phy [ label = "L1 chan Deactivate SAPIs" ];
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bts -> bsc [ label = "RSL RF Channel Release Ack (TCH/H)" ];
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--- [ label = "BSC notices: one chan still in use"];
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--- [ label = "...Voice call 2 ends" ];
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bts => bsc [ label = "Release Ind" ];
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bsc => bts [ label = "RSL RF Channel Release (TCH/H)" ];
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bts => phy [ label = "L1 chan Deactivate SAPIs" ];
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bts -> bsc [ label = "RSL RF Channel Release Ack (TCH/H)" ];
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phy box bsc [ label = "If all channels on TS are released, PDCH Activation" ];
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bsc => bts [ label = "RSL Channel Activation (PDCH)" ];
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bts -> bsc [ label = "RSL Channel Activation Ack (PDCH) (unconditionally)" ];
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--- [ label = "BTS notices: chan still connected as TCH/H, reconnect" ];
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bts => phy [ label = "L1 chan Disconnect TCH/H" ];
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phy -> bts [ label = "L1 chan Disconnect confirm" ];
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bts => phy [ label = "L1 chan Connect PDTCH" ];
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phy -> bts [ label = "L1 chan Connect confirm" ];
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--- [ label = "chan reconnect as PDTCH complete" ];
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bts => pcu [ label = "Info Ind (Activate)" ];
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pcu => bts [ label = "chan Activate request" ];
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bts => phy [ label = "L1 chan Activate PDTCH SAPIs" ];
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phy -> bts [ label = "L1 chan Activate SAPIs confirm" ];
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}
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