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Diffstat (limited to 'doc/manuals/chapters/overview.adoc')
| -rw-r--r-- | doc/manuals/chapters/overview.adoc | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/doc/manuals/chapters/overview.adoc b/doc/manuals/chapters/overview.adoc index abc7496b2..e2c010712 100644 --- a/doc/manuals/chapters/overview.adoc +++ b/doc/manuals/chapters/overview.adoc @@ -74,14 +74,13 @@ The LLC (Logical Link Control) implementation of OsmoSGSN only supports non-acknowledged mode, as this is the most common use case in real-world GPRS networks. -Furthermore, it does not support IP header nor payload compression at -this point. Addition of those features is subject to customer demand or -user/customer contributions. - -The LLC implementation does support LLC encryption. However, as no HLR -access is implemented yet, there is no way to enable/configure -per-subscriber specific keys. +It does support both TCP/IP header compression according to RFC1144 and +payload compression according to V.42bis +The LLC implementation does support LLC encryption with ciphers GEA3 and GEA4. +For encryption to work the auth policy needs to be set to remote and the SGSN +connected to an HLR containing the subscriber data including key material. +Other auth policys will not work with encryption. ==== Session Management Implementation @@ -93,11 +92,8 @@ networks while skipping the more esoteric features. Multiple PDP contexts can be attached by a single MS. -Currently, all PDP contexts are routed to the same GGSN, irrespective of -the APN used/configured in the MS. This is sufficient (and actually -desirable) for small autonomous networks, but of course not suitable for -real networks in roaming scenarios. Please contact sysmocom in case you -require additional features such as DNS-based APN resolving. +Multiple GGSNs can be configured and routing to a GGSN can be configured based +on APN. Dynamic lookup of GGSNs though DNS-based APN resolving is also possible. === Limitations @@ -109,10 +105,5 @@ performing that work. Known Limitations include: -* No LLC encryption support -* No interface to the OsmoNITB HLR * No paging coordination between SGSN and MSC * No SMS over Ps support -* No IuPS interface for 3G (in progress) -* No IP header compression -* No payload compression |