Wiki¶

Problem Areas¶

• Routing Lookups for network elements
  • Determine HLR IP/hostname by IMSI (to know which HLR to ask during GSUP SendAuthInfo + UpdateLocation)
    • could be static table / config file with ISMI prefix, like 334-42-001-0123456 where "001" is site/network name and "0123456" is the subscriber in that site/network
    • could use something like enum/DNS
  • Determine HLR IP/hostname by MSISDN (to know which HLR to ask for current serving VLR/MSC IP/hostname)
    • could be static table / config file with ISMI prefix, like 52-123-012-3456 where "012" is a prefix for the given site/network and "3456" is the subscriber in that site/network. Probably too restrictive.
    • could use something like enum/DNS
• Routing Lookups for subscribers
  • determine serving VLR/MSC IP/hostname by MSISDN: SendRoutingInfo
• Synchronization
  • single-master multi-slave
    • subscriber data (MSISDN, IMSI, GPRS/SMS/Voice permission, Auth keys, ...)
  • distributed
    • present location of subscriber (serving VLR/MSC)

Unsorted¶

• MediaPlane
• MulticastProposal
• NetworkLayout
• Procedures
  • MobileTerminatedCall
  • Roaming
  • SMS
• VlrPersistency