dgsm Proxy Cache design WIP
Change-Id: Ifa322e84fadd3b04943c8c7024c0e2de4935bed0
diff --git a/doc/manuals/chapters/proxy_cache_attach.msc b/doc/manuals/chapters/proxy_cache_attach.msc
new file mode 100644
index 0000000..9d43a6b
--- /dev/null
+++ b/doc/manuals/chapters/proxy_cache_attach.msc
@@ -0,0 +1,33 @@
+msc {
+ hscale="2";
+ ms[label="MS,BSS"],__msc[label="MSC"],hlr[label="HLR proxy"],home[label="Home HLR"];
+
+ ms => __msc [label="Location Updating Request (IMSI Attach)"];
+ __msc => hlr [label="Send Auth Info Request"];
+ hlr abox hlr [label="No proxy cache data available for this subscriber"];
+ hlr rbox home [label="mslookup finds the home HLR"];
+ hlr => home [label="Send Auth Info Request"];
+ hlr <= home [label="Send Auth Info Result\nwith 5 auth tuples"];
+ hlr rbox hlr [label="(1) Keep a copy of the auth tuples"];
+ __msc <= hlr [label="Send Auth Info Result"];
+ __msc rbox __msc [label="MSC stores 5 auth tuples,\nuses the first one now,\nand keeps the rest for later requests"];
+ ms rbox __msc [label="Authentication"];
+ __msc => hlr [label="Update Location Request"];
+ hlr => home [label="Update Location Request"];
+ hlr <= home [label="Insert Subscriber Data Request\n(with subscriber's MSISDN)"];
+ hlr rbox hlr [label="proxy HLR caches the MSISDN"];
+ __msc <= hlr [label="Insert Subscriber Data Request"];
+ __msc => hlr [label="Insert Subscriber Data Result"];
+ hlr => home [label="Insert Subscriber Data Result"];
+ hlr <= home [label="Update Location Result"];
+ __msc <= hlr [label="Update Location Result"];
+ ms <= __msc [label="Location Updating Accept"];
+ hlr abox hlr [label="After successful Update Location, check the cache"];
+ hlr rbox hlr [label="(2) Ask for more auth tuples to cache\n(amount of tuples configurable)"];
+ hlr => home [label="Send Auth Info Request"];
+ hlr <= home [label="Send Auth Info Result"];
+ hlr rbox hlr [label="store 5 more tuples"];
+ hlr => home [label="Send Auth Info Request"];
+ hlr <= home [label="Send Auth Info Result"];
+ hlr rbox hlr [label="store yet 5 more tuples"];
+}