Osmocom and LTE

Irrespective of Osmocom…

What do we need to run a combined 2G/4G network?

  1. shared subscriber database (HLR + HSS)
  2. advertisement of respective neighbor cells
  3. shared PS tunnel endpoint (GGSN + P-GW)

optionally:

Shared Subscriber Database

Advertisement of neighbor cells

Shared PS tunnel endpoint

Solution:

SGs interface

Inter-RAT PS handover

Conclusions

The logical steps to improve our LTE interworking are:

  1. split HLR/HSS and split GGSN/P-GW (today)
  2. GSUP-to-DIAMETER translator for shared HLR/HSS
  3. shared GGSN/P-GW for

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