diff options
Diffstat (limited to 'doc/manuals/chapters/proxy_cache_umts_aka_resync.ladder')
| -rw-r--r-- | doc/manuals/chapters/proxy_cache_umts_aka_resync.ladder | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/doc/manuals/chapters/proxy_cache_umts_aka_resync.ladder b/doc/manuals/chapters/proxy_cache_umts_aka_resync.ladder new file mode 100644 index 0000000..00ad36e --- /dev/null +++ b/doc/manuals/chapters/proxy_cache_umts_aka_resync.ladder @@ -0,0 +1,55 @@ +{hscale=2} +ms = MS,BSS +msc = MSC +hlr = HLR proxy +home = Home HLR + +ms -> msc CM Service Request / Paging Response +msc -> hlr Send Auth Info Request +hlr <> . there still are unsent auth tuples + in the cache +hlr () . Send cached, fresh tuples +msc <- hlr Send Auth Info Result + containing auth tuples + from the proxy cache +ms <- msc Authentication Request +ms -> msc USIM requests UMTS AKA resync + Auth Failure with AUTS +msc -> hlr Send Auth Info Request + containing AUTS IE +hlr () . Mark all UMTS AKA tuples as stale +--- If the home HLR responds in time +hlr -> home Send Auth Info Request +hlr <- home Send Auth Info Result + with 5 auth tuples +hlr () . clear tuple cache, store new tuples +msc <- hlr Send Auth Info Result +ms () msc Authentication +hlr () . fill up the tuple cache as necessary +hlr -> home Send Auth Info Request +hlr <- home Send Auth Info Result +... +--- If the home HLR is unreachable +hlr -> home Send Auth Info Request +hlr <> . no link + or + response timeout +hlr () . Store the AUTS received earlier, + and set up a timer to retry SAI + (a few minutes?) +--- If no GSM AKA fallback is allowed +msc <- hlr Send Auth Info Error +ms () msc Detach +--- If GSM AKA fallback is allowed +hlr () . Resend only GSM AKA tuples, already sent earlier +msc <- hlr Send Auth Info Result + containing GSM AKA auth tuples + from the proxy cache +ms () msc 2G: Authentication + 3G: Detach +--- +hlr <> . AUTS timer triggers +hlr -> home Send Auth Info Request +hlr <- home Send Auth Info Result +hlr () . clear tuple cache, store new tuples +hlr () . continue to fill up the cache as necessary |