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Bostjan Meglic babc30940a [AMF] Do not send Deregistration Event to UDM when UE deregisters 
According to TS 23.502, 4.2.2.2.2, AMF sends Registration event to UDM
in the following cases:
- If the AMF has changed since the last Registration procedure, or
- if the UE provides a SUPI which doesn't refer to a valid context in
the AMF,
- or if the UE registers to the same AMF it has already registered
to a non- 3GPP access (i.e. the UE is registered over a non-3GPP access
and initiates this Registration procedure to add a 3GPP access).

In case that UE re-registers to the network with a GUTI, it bypasses
authentication check to the AUSF. In this case, AMF does not send
Registration event to UDM.
Consequently, when UE deregisters again, AMF would send a Deregistration
Event to a UDM, which does not have a context for it.

3GPP standard does not say when AMF sends Deregistration Event to UDM,
only that it is optional.

These (De-)Registration events are for (de-)registering AMF to the UDM
for serving the UE. And not for (de-)registering UE itself for purpose
of tracking when UE is registered on the network.

This partially reverts commit 7be7029ac4
 		2022-07-11 22:44:07 +09:00
.github Remove sctp test in MacOSX CI (#1489) 2022-04-14 10:31:20 +09:00
configs [SGWC,SMF] Add specific config opt max.gtp_peer to set gtp_node mempool size (#1623) 2022-06-23 22:03:48 +09:00
debian d/open5gs-upf.postinst: don't restart service in chroot 2022-07-05 10:22:36 +09:00
docker [build] Use local sources to build applications (#1583) 2022-06-19 18:18:09 +09:00
docs Change Default MCC/MNC 901/70 -> 999/70 (#1331) 2022-06-23 21:37:47 +09:00
lib [SBI] fixed wrong request-nf-type (#1650) 2022-07-08 21:36:52 +09:00
misc [MISC] Add support for static code analysis 2022-07-01 21:38:47 +09:00
src [AMF] Do not send Deregistration Event to UDM when UE deregisters 2022-07-11 22:44:07 +09:00
subprojects Initial metrics support based on Prometheus (#1571) 2022-06-08 05:51:02 +09:00
tests Changes MAX TLV MORE to 16 2022-06-29 14:35:01 +09:00
vagrant Migrating to CentOS Stream 8 in Vagrant (#1450) 2022-04-01 22:28:32 +09:00
webui Release v2.4.7 2022-05-21 19:22:11 +09:00
.clang-tidy [MISC] Add support for static code analysis 2022-07-01 21:38:47 +09:00
.dockerignore [build] Use local sources to build applications (#1583) 2022-06-19 18:18:09 +09:00
.gitignore Initial metrics support based on Prometheus (#1571) 2022-06-08 05:51:02 +09:00
LICENSE Change LICENSE to GNU AGPL v3.0 2017-12-18 10:35:54 +09:00
README.md [SMF] Apply 5G Core into GSM (#1498) 2022-05-15 06:27:54 +09:00
meson.build [MISC] Add support for static code analysis 2022-07-01 21:38:47 +09:00
meson_options.txt Initial metrics support based on Prometheus (#1571) 2022-06-08 05:51:02 +09:00

README.md

Open5GS

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Documentation

If you don't understand something about Open5GS, the https://open5gs.org/open5gs/docs/ is a great place to look for answers.

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