3G/UMTS

Location Updating Reject

This is a NAS message which is sent to UE when the UE is not allowed to register to the specific network or a specific Location Area.

< Cause #11 - PLMN not allowed’ >

Network send this message when a UE tries to camp on the PLMN (usually VPLMN) which is not allowed for the UE. When it recieves, UE has to do following steps.

i) UE has to store this PLMN in forbidden PLMN list in USIM

UE has to remove this PLMN from 'forbidden LPLMN' list in the following cases.

i) UE is switched off

ii) USIM is removed

iii) User select the PLMN in Manual Selection Mode and it gets accepted by the network.

< Cause #12 - LA not allowed’ >

When a UE have a ‘regionally restricted service’ where it can only obtain service on certain LAs and it attempts to camp on a cell of an LA for which it does not have service entitlement, it recieves the Location Update Reject with Cause #12. When it recieves, UE has to do following steps.

i) UE has to store this LAI in the 'forbidden LAs for regional provision of service' list in UE so that it would not keep retrying the location updating process.

ii) UE gets into 'Limited Service' state.

iii) UE initiate Cell Selection Process

UE has to remove this LAI from 'forbidden LAs for regional provision of service' list in the following cases.

i) UE is switched off

ii) USIM is removed

One possible test scenario can be as follows. (This is based on GSMA TS11 17.1.4. I converted the test description into an illustration). This sequence shows only the important portions, there should be many additional common message in between each step (usually at the location of orange dotted lines). This is just one example, there can be a lot of variations of steps depending on network operators.

Condition :

PLMN of GSM1, WCDMA1, WCDMA2, GSM2 are all same.

LAI of GSM1, WCDMA1, WCDMA2, GSM2 are all different

< Cause #13 - ‘roaming not allowed in this LA’ >

When a UE recieves the Location Update Reject with Cause #13, UE has to do following steps.

i) UE has to store this LAI in the 'forbidden LAs for roaming' list in UE so that it would not keep retrying the location updating process.

ii) UE has to initiate PLMN selection process (not Cell Selection Process).

One possible test scenario can be as follows. (This is based on GSMA TS11 17.1.3. I converted the test description into an illustration). This sequence shows only the important portions, there should be many additional common message in between each step (usually at the location of orange dotted lines). This is just one example, there can be a lot of variations of steps depending on network operators.

Condition :

PLMN of WCDMA1, WCDMA2 are same, PLMN of GSM may or may not be same.

LAI of WCDMA1, WCDMA2, GSM are all different

< Cause #15 - ‘No Suitable Cells In LA’ >

When a UE recieves the Location Update Reject with Cause #15, UE has to do following steps.

i) UE has to store this LAI in the 'forbidden LAs for roaming' list in UE so that it would not keep retrying the location updating process.

ii) UE has to searches for a suitable cell in the same PLMN but belonging to an LA which is not in the ‘forbidden LAs for roaming’ list

One possible test scenario can be as follows. (This is based on GSMA TS11 17.1.2. I converted the test description into an illustration). This sequence shows only the important portions, there should be many additional common message in between each step (usually at the location of orange dotted lines). This is just one example, there can be a lot of variations of steps depending on network operators.

Condition :

PLMN of WCDMA1, WCDMA2, GSM are all same.

LAI of WCDMA1, WCDMA2, GSM are all different