| Neels Hofmeyr | 1971b67 | 2020-01-23 04:40:51 +0100 | [diff] [blame^] | 1 | msc { |
| 2 | hscale="2"; |
| 3 | ms[label="MS,BSS"],__msc[label="MSC"],hlr[label="HLR proxy"],home[label="Home HLR"]; |
| 4 | |
| 5 | ms => __msc [label="CM Service Request / Paging Response"]; |
| 6 | __msc => hlr [label="Send Auth Info Request"]; |
| 7 | hlr rbox hlr [label="Use already set up proxy path"]; |
| 8 | hlr abox hlr [label="there still are unsent auth tuples\nin the cache"]; |
| 9 | hlr rbox hlr [label="(3) Send cached, fresh tuples"]; |
| 10 | __msc <= hlr [label="Send Auth Info Result\ncontaining auth tuples\nfrom the proxy cache"]; |
| 11 | ms rbox __msc [label="Authentication"]; |
| 12 | ms rbox __msc [label="Continue the CM Service / Paging action"]; |
| 13 | hlr abox hlr [label="Note that there are no/few unused tuples in the cache, fill up again"]; |
| 14 | hlr rbox hlr [label="(4) Ask for more auth tuples to cache"]; |
| 15 | hlr => home [label="Send Auth Info Request"]; |
| 16 | --- [label="If the home HLR link is not working"]; |
| 17 | hlr abox hlr [label="no link\nor\nresponse timeout"]; |
| 18 | hlr rbox hlr [label="(5) Set up a timer to retry SAI\n(a few minutes?)"]; |
| 19 | hlr abox hlr [label="Timer triggers"]; |
| 20 | hlr => home [label="Send Auth Info Request"]; |
| 21 | --- [label="If the home HLR link is functional"]; |
| 22 | hlr <= home [label="Send Auth Info Result"]; |
| 23 | hlr rbox hlr [label="store 5 more tuples"]; |
| 24 | } |