Cisco Cisco Packet Data Gateway (PDG)
Cause Code Mapping of ESM #66 by SGSN and MME
CSCut50598 - 3GPP 24.301 R11 new cause code '#66'
Feature Changes
This feature is developed to achieve compliance with Release 11 3GPP Technical Specifications. The Release
11 3GPP Technical Specification introduced a new ESM/SM cause code 'Requested APN not supported in
current RAT and PLMN combination (cause code #66)'. This ESM/SM cause is used by the network to indicate
that the procedure requested by the UE is rejected as the requested APN is not supported in the current RAT
and PLMN. A UE which receives this cause will stop accessing the APN in the current RAT, but as soon as
it enters another RAT type it will retry the APN.
11 3GPP Technical Specification introduced a new ESM/SM cause code 'Requested APN not supported in
current RAT and PLMN combination (cause code #66)'. This ESM/SM cause is used by the network to indicate
that the procedure requested by the UE is rejected as the requested APN is not supported in the current RAT
and PLMN. A UE which receives this cause will stop accessing the APN in the current RAT, but as soon as
it enters another RAT type it will retry the APN.
In earlier releases only cause code #27 and cause code #33 were supported, these codes were not very effective
in restricting APN in a particular RAT. For example, UE which has received cause #27 (with timer = 24 hours)
will stop retrying a PDN connection in every RAT for 24 hours. This is not the desired behavior in some cases
APN cannot be restricted in a particular RAT. If the SGSN sends cause code #33 to the UE for an IMS APN,
the UE/MS stops retrying the PDN connection for some time, but UE/MS will not automatically retry this
APN in 4G, even though the APN is available there. The introduction of cause code #66 resolves this issue
as the operator can block access to IMS APN in 2G/3G and can allow access in 4G.
in restricting APN in a particular RAT. For example, UE which has received cause #27 (with timer = 24 hours)
will stop retrying a PDN connection in every RAT for 24 hours. This is not the desired behavior in some cases
APN cannot be restricted in a particular RAT. If the SGSN sends cause code #33 to the UE for an IMS APN,
the UE/MS stops retrying the PDN connection for some time, but UE/MS will not automatically retry this
APN in 4G, even though the APN is available there. The introduction of cause code #66 resolves this issue
as the operator can block access to IMS APN in 2G/3G and can allow access in 4G.
This feature is applicable for both SGSN and MME.
Note
This is a 3GPP Release 11 compliance feature and will be applicable only to UEs capable of decoding
ESM/SM cause code 66.
ESM/SM cause code 66.
Important
Command Changes
restrict access-type
The restrict access-type command under the APN profile configuration mode is used to configure PDP
activation restriction on the basis of access type. A new command option eps for EPS networks is introduced
for this feature. In earlier releases this command was supported only for GPRS and UMTS networks to perform
QoS related restrictions. Now this command is also used to configure the APN not supported in particular
RAT and PLMN combinations. If this command is enabled, new PDP activations to an APN with which this
APN profile is associated are rejected. During handovers PDPs/PDNs are deactivated if the APN name matches
with this APN profile.
activation restriction on the basis of access type. A new command option eps for EPS networks is introduced
for this feature. In earlier releases this command was supported only for GPRS and UMTS networks to perform
QoS related restrictions. Now this command is also used to configure the APN not supported in particular
RAT and PLMN combinations. If this command is enabled, new PDP activations to an APN with which this
APN profile is associated are rejected. During handovers PDPs/PDNs are deactivated if the APN name matches
with this APN profile.
configure
apn-profile <profile_name>
[ no ] restrict access-type { eps | { { gprs | umts } [ qos-class { background | conversational |
interactive | streaming } ] } }
default restrict access-type { eps | gprs | umts }
end
end
Notes:
Release Change Reference, StarOS Release 19
208
MME Changes in Release 19
Cause Code Mapping of ESM #66 by SGSN and MME