146 lines
7.2 KiB
Plaintext
146 lines
7.2 KiB
Plaintext
[[chapter_introduction]]
|
|
== Overview
|
|
|
|
[[intro_overview]]
|
|
=== About OsmoGGSN
|
|
|
|
OsmoGGSN is a Free / Open Source Software implementation of the GPRS
|
|
GGSN (Gateway GPRS support node) element in side the packet switched
|
|
core network of 2G and 3G cellular networks.
|
|
|
|
The GGSN function is the tunnel endpoint on the core network side,
|
|
from where the external (IP) packet data network
|
|
|
|
=== Software Components
|
|
|
|
==== GTP Implementation (libgtp)
|
|
|
|
The OsmoGGSN source code includes a shared library implementation of
|
|
the GTP protocol used on the GGSN-SGSN interface. This library
|
|
and associated header files are installed system-wide and are
|
|
available to other programs/applications.
|
|
|
|
In fact, libgtp is what the OsmoSGSN also uses for its use of GTP.
|
|
|
|
==== sgsnemu
|
|
|
|
In order to test OsmoGGSN without running a SGSN and other elements
|
|
of a cellular network, there is a small command-line utility called
|
|
*sgsnemu* which is able to simulate the customary operations of a SGSN
|
|
towards the GGSN, such as a PDP Context Activation.
|
|
|
|
*sgsnemu* can even be used for testing against other GGSNs, as the GTP
|
|
protocol is standardized across implementations.
|
|
|
|
==== osmo-ggsn
|
|
|
|
*osmo-ggsn* is the actual name of the OsmoGGSN executable program. It
|
|
implements the GGSN functionality. All parameters are set using the
|
|
configuration file, by default located in *./osmo-ggsn.cfg*
|
|
|
|
==== systemd service file
|
|
|
|
In *contrib/osmo-ggsn.service* you can find a sample service file for
|
|
OsmoGGSN which can be used with systemd.
|
|
|
|
==== init script
|
|
|
|
In *contrib/osmo-ggsn.init* you can find a sample init script to be used
|
|
on systems with classic init process.
|
|
|
|
=== Limitations
|
|
|
|
OsmoGGSN supports both GTP0 (GSM 09.60) and GTP1 (3GPP 29.060). In the
|
|
following tables the support of each individual message type is
|
|
detailed. The numbers before each feature indicates the relevant
|
|
section in the standard.
|
|
|
|
==== GSM 09.60 (GTPv0)
|
|
|
|
[options="header",cols="50%,15%,15%,15%,5%"]
|
|
|===
|
|
| Feature | gtplib | osmo-ggsn | sgsnemu | notes
|
|
5+<|*7.4 Path Management Messages*
|
|
|7.4.1 Echo Request |Supported |Supported |Supported |
|
|
|7.4.2 Echo Response |Supported |Supported |Supported |
|
|
|7.4.3 Version Not Supported |Supported |Supported |Supported |
|
|
5+<| *7.5 Tunnel Management Messages*
|
|
|7.5.1 Create PDP Context Request|Supported |Supported |Supported |
|
|
|7.5.2 Create PDP Context Response|Supported |Supported |Supported |
|
|
|7.5.3 Update PDP Context Request|Supported |Supported |Not |
|
|
|7.5.4 Update PDP Context Response|Supported |Supported |Not |
|
|
|7.5.5 Delete PDP Context Request|Supported |Supported |Supported |
|
|
|7.5.6 Delete PDP Context Response|Supported |Supported |Supported |
|
|
|7.5.7 Create AA PDP Context Request|Unsupported |Unsupported |Unsupported |
|
|
|7.5.8 Create AA PDP Response|Unsupported |Unsupported |Unsupported |
|
|
|7.5.9 Delete AA PDP Context Request|Unsupported |Unsupported |Unsupported |
|
|
|7.5.10 Delete AA PDP Context Response|Unsupported |Unsupported |Unsupported |
|
|
|7.5.11 Error Indication |Supported |Supported |Supported |
|
|
|7.5.12 PDU Notification Request|Unsupported |Unsupported |Unsupported |
|
|
|7.5.13 PDU Notification Response|Unsupported |Unsupported |Unsupported |
|
|
|7.5.14 PDU Notification Reject Request|Unsupported |Unsupported |Unsupported |
|
|
|7.5.15 PDU Notification Reject Response|Unsupported |Unsupported |Unsupported |
|
|
5+<| *7.6 Location Management Messages*
|
|
|7.6.1 Send Routeing Information for GPRS Request|Unsupported |Unsupported |Not applicable |
|
|
|7.6.2 Send Routeing Information for GPRS Response|Unsupported |Unsupported |Not applicable |
|
|
|7.6.3 Failure Report Request|Unsupported |Unsupported |Not applicable |
|
|
|7.6.3 Failure Report Response|Unsupported |Unsupported |Not applicable |
|
|
|7.6.5 Note MS GPRS Present Request|Unsupported |Unsupported |Not applicable|
|
|
|7.6.6 Note MS GPRS Present Response|Unsupported |Unsupported |Not applicable|
|
|
5+<| *7.5 Mobility Management Messages*
|
|
|7.5.1 Identification Request|Unsupported |Not applicable|Not applicable|
|
|
|7.5.2 Identification Response|Unsupported |Not applicable|Not applicable |
|
|
|7.5.3 SGSN Context Request|Unsupported |Not applicable|Not applicable|
|
|
|7.5.4 SGSN Context Response|Unsupported |Not applicable|Not applicable|
|
|
|7.5.5 SGSN Context Acknowledge|Unsupported |Not applicable|Not applicable|
|
|
|===
|
|
|
|
==== 3GPP 29.060 (GTPv1)
|
|
|
|
[options="header",cols="50%,15%,15%,15%,5%"]
|
|
|===
|
|
|Feature |gtplib |osmo-ggsn |sgsnemu |notes
|
|
5+<|*7.2 Path Management Messages*
|
|
|7.2.1 Echo Request |Supported |Supported |Supported |
|
|
|7.2.2 Echo Response |Supported |Supported |Supported |
|
|
|7.2.3 Version Not Supported|Supported |Supported |Supported |
|
|
|7.2.4 Extension Headers Notification|Supported |Supported |Supported |
|
|
5+<|*7.3 Tunnel Management Messages*
|
|
|7.3.1 Create PDP Context Request|Supported |Supported |Supported |1
|
|
|7.3.2 Create PDP Context Response|Supported |Supported |Supported |
|
|
|7.3.3 Update PDP Context Request|Supported |Supported |Not applicable|1
|
|
|7.3.4 Update PDP Context Response|Supported |Supported |Not applicable|
|
|
|7.3.5 Delete PDP Context Request|Supported |Supported |Supported |
|
|
|7.3.6 Delete PDP Context Response|Supported |Supported |Supported |
|
|
|7.3.7 Error Indication |Supported |Supported |Supported |
|
|
|7.3.8 PDU Notification Request|Unsupported |Unsupported |Unsupported |
|
|
|7.3.9 PDU Notification Response|Unsupported |Unsupported |Unsupported |
|
|
|7.3.10 PDU Notification Reject Request|Unsupported |Unsupported |Unsupported |
|
|
|7.3.10 PDU Notification Reject Response|Unsupported |Unsupported |Unsupported |
|
|
5+<|*7.4 Location Management Messages*
|
|
|7.4.1 Send Routeing Information for GPRS Request|Unsupported |Unsupported |Not applicable |
|
|
|7.4.2 Send Routeing Information for GPRS Response|Unsupported |Unsupported |Not applicable |
|
|
|7.4.3 Failure Report Request|Unsupported |Unsupported |Not applicable|
|
|
|7.4.3 Failure Report Response|Unsupported |Unsupported |Not applicable|
|
|
|7.4.5 Note MS GPRS Present Request|Unsupported |Unsupported |Not applicable|
|
|
|7.4.6 Note MS GPRS Present Response|Unsupported |Unsupported |Not applicable|
|
|
5+<|*7.5 Mobility Management Messages*
|
|
|7.5.1 Identification Request|Unsupported |Not applicable|Not applicable|
|
|
|7.5.2 Identification Response|Unsupported |Not applicable |Not applicable|
|
|
|7.5.3 SGSN Context Request|Unsupported |Not applicable|Not applicable|
|
|
|7.5.4 SGSN Context Response|Unsupported |Not applicable |Not applicable|
|
|
|7.5.5 SGSN Context Acknowledge|Unsupported |Not applicable|Not applicable|
|
|
|7.5.6 Forward Relocation Request|Unsupported |Not applicable|Not applicable|
|
|
|7.5.7 Forward Relocation Response|Unsupported |Not applicable|Not applicable|
|
|
|7.5.8 Forward Relocation Complete|Unsupported |Not applicable|Not applicable|
|
|
|7.5.9 Relocation Cancel Request|Unsupported |Not applicable|Not applicable|
|
|
|7.5.10 Relocation Cancel Response|Unsupported |Not applicable|Not applicable|
|
|
|7.5.11 Forward Relocation Complete |Unsupported |Not applicable |Not applicable |
|
|
|7.5.12 Forward SRNS Context Acknowledge|Unsupported |Not applicable|Not applicable|
|
|
|7.5.13 Forward SRNS Context|Unsupported |Not applicable|Not applicable|
|
|
|===
|
|
|
|
Notes
|
|
|
|
1) The "Secondary PDP Context Activation Procedure" is not supported.
|