System and methods to maintain priority of VPLMN
Embodiments herein provide a method for managing a priority of Visited Public Land Mobile Networks (VPLMNs) of a wireless communication network. The method includes receiving a registration accept message including steering of roaming (SoR) information from a VPLMN; in response to a security check of the SoR information being failed, adding the VPLMN to a SoR abort list including PLMNs where a registration was aborted due to SoR; and deleting the SoR abort list after a predetermined time period.
1 . A method for managing a priority of visited public land mobile networks (VPLMNs) of a wireless communication network by a user equipment (UE), the method comprising:
receiving a registration accept message including steering of roaming (SoR) information from an access and mobility management function (AMF) of a VPLMN;
based on a security check of the SoR information being failed, adding the VPLMN to a list of public land mobile networks (PLMNs) where a registration was aborted due to SoR; and
deleting the list after a predetermined time period.
2 . The method of claim 1 , further comprising:
modifying a priority of the VPLMN lower than a configured priority of the VPLMN during the predetermined time period.
3 . The method of claim 1 , further comprising:
determining whether the list is available in the UE; and
creating the list upon determining that the SoR abort list is unavailable in the UE.
4 . The method of claim 1 ,
wherein a priority of the VPLMN is a configured priority.
5 . The method of claim 1 , further comprising:
after the predetermined time period or in response to deleting the list, determining whether a first VPLMN is available in a VPLMN available list; and
in response to determining the first VPLMN is not available in the VPLMN available list, registering on the first VPLMN present in the list of PLMNs where a registration was aborted due to SoR.
6 . The method of claim 1 , wherein the UE considers at least one PLMN in the list as lowest priority.
7 . A user equipment (UE) for managing a priority of visited public land mobile networks (VPLMNs) of a wireless communication network, the UE comprising:
a transceiver; and
a processor coupled to the transceiver, wherein the processor is configured to:
receive a registration accept message including steering of roaming (SoR) information from an access and mobility management function (AMF) of a VPLMN,
based on a security check of the SoR information being failed, add the VPLMN to a list of public land mobile networks (PLMNs) where a registration was aborted due to SoR, and
delete the list after a predetermined time period.
8 . The UE of claim 7 , wherein the processor is further configured to:
modify a priority of the VPLMN lower than a configured priority of the VPLMN during the predetermined time period.
9 . The UE of claim 7 , wherein the processor is further configured to:
determine whether the list is available in the UE; and
create the list upon determining that the list is unavailable in the UE.
10 . The UE of claim 7 , wherein a priority of the VPLMN is a configured priority.
11 . The UE of claim 7 , wherein the processor is further configured to:
after the predetermined time period or in response to deleting the list, determine whether a first VPLMN is available in a VPLMN available list, and
in response to determining the first VPLMN is not available in the VPLMN available list, register on the first VPLMN present in the list.
12 . The UE of claim 7 , wherein the UE considers at least one PLMN in the list as lowest priority.
13 . A non-transitory computer-readable storage medium storing instructions which, when executed by a processor of a user equipment (UE), causes the UE to perform operations, the operations comprising:
receiving a registration accept message including steering of roaming (SoR) information from an access and mobility management function (AMF) of a visited public land mobile network (VPLMN);
based on a security check of the SoR information being failed, adding the VPLMN to a list of public land mobile networks (PLMNs) where a registration was aborted due to SoR; and
deleting the list after a predetermined time period.
14 . The non-transitory computer-readable storage medium of claim 13 , wherein the operations further comprises:
modifying a priority of the VPLMN lower than a configured priority of the VPLMN during the predetermined time period.
15 . The non-transitory computer-readable storage medium of claim 13 , wherein the operations further comprise:
determining whether the list is available in the UE; and
creating the list upon determining that the SoR abort list is unavailable in the UE.
16 . The non-transitory computer-readable storage medium of claim 13 , wherein a priority of the PLMN is a configured priority.
17 . The non-transitory computer-readable storage medium of claim 13 , wherein the operations further comprise:
after the predetermined time period or in response to deleting the list, determining whether a first VPLMN is available in a VPLMN available list; and
in response to determining the first VPLMN is not available in the VPLMN available list, registering on the first VPLMN present in the list.
18 . The non-transitory computer-readable storage medium of claim 13 , wherein the UE considers at least one PLMN in the list as lowest priority.