Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose a wireless network and methods to maintain a MA PDU session at a NSACF entity. The method includes determining, by a SMF entity, that a PDU session is the MA PDU session based on an indication from a UE. Further, the method includes indicating, by the SMF entity, that the PDU session is the MA PDU session to the NSACF entity in response to determination. The wireless network may maintain the count accurately even though the PDU session is a MA PDU session.

Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Methods and systems for handling network slice admission control for User Equipment (UE) are provided. The disclosure relates to network slicing and more particularly, to a system and method of ensuring that a communication system is able to accurately enforce quota on the maximum number of UEs concurrently registering for a network slice defined by a Single Network Slice Selection Assistance Information (S-NSSAI). The disclosure describes how the limits of “Number of Terminals” configured for an S-NSSAI may be accurately maintained in a Network Slice Admission Control Function (NSACF), and thus the enforcement may be performed when the limit is really exhausted. The disclosure also describes that a deregistration notification from a Unified Data Management (UDM) may act as a trigger for an old Mobility Management Function (AMF) to decrement counts in the NSACF as the old AMF is no longer serving the UE.

Abstract: Embodiments herein achieve a method for handling registration and session management in a wireless communication system. The method includes registering, by a User Equipment (UE), with a first core network entity over a 3GPP access network and a non-3GPP access network. Further, the method includes triggering, by the UE, a registration procedure to a second core network over the 3GPP access network when a periodic timer of the UE expires in an OOS state. Further, the method includes receiving, by the UE, a non-access stratum (NAS) message, over the 3GPP access network, with an indication to register for the non-3GPP access network with the second core network entity. Further, the method includes reinitiating the registration procedure to register again for the non-3GPP access with the second core network entity through the non-3GPP access network.

Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure relates to a method and UE for managing SoR security check failure during registration procedure in wireless network. Embodiments herein provide a method for managing SOR security check failure during a registration procedure in a wireless network (1000) by a UE (100). The method includes sending a registration request message to a network apparatus (300) in the wireless network (1000). Further, the method includes storing a registration type set by the UE (100) while sending the registration request message to the network apparatus (300), wherein the registration type is one of a mobility registration updating and an initial registration. Further, the method includes receiving a registration accept message comprises a Steering of roaming connected mode control information (SOR-CMCI) configuration. Further, the method includes determining a SOR security check failure.

Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments disclosed herein relate to wireless communication networks, and more particularly to managing PDU sessions in wireless communication networks. The method maintains by a user equipment (UE), a count value for the maximum number of PDU sessions for a first access and a second access on a first network entity (NE). The UE sends a PDU session establishment request when a number of active PDU sessions is lower than the count value for the maximum number of PDU sessions or an established PDU session is released on one or more of the first access and the second access in which the maximum number of the PDU sessions has been reached.

Abstract: An example a method for managing paging restrictions in a wireless network includes detecting, by a UE, whether a first subscriber identity module (SIM) is configured for a dedicated data subscription (DDS). The method further includes detecting, by the UE, an occurrence of a trigger condition in connection with at least one of the first SIM and at least one second SIM and enabling, by the UE, a paging restriction to the at least one second SIM based on the occurrence of the predetermined trigger condition.

Abstract: Embodiments herein provide a method for handling synchronization of Home Network (HN) security key(s) in a wireless network. The proposed method includes receiving a Non-access stratum (NAS) authentication request message from a network entity (200A), where the UE (100A) holds a first Home network (HN) security key. Further, the method includes determining an authentication response message for the received NAS authentication request message and generating a second HN security key from a plurality of input parameters received in the NAS authentication request message and sending authentication response message to the network entity (200A). Further, the method includes storing the second HN security key in response to receiving a NAS security mode command message from the network entity (200A) or ignore the second HN security key in response to receiving a NAS reject message from the network entity (200A).

Abstract: A method for managing 5G Mobility Management (5GMM) parameters of a Standalone Non Public Network (SNPN) at a User Equipment (UE), the method includes selecting an SNPN identifier (SNPN ID) from among SNPN IDs in a first list, determining whether the first list includes a valid Subscriber Permanent Identifier (SUPI) for the SNPN ID, the first list including SNPN parameter values associated with the SNPN IDs, identifying a first SUPI from a first Universal Subscriber Identifier Module (USIM) of the UE in response to determining that the first list does not include the valid SUPI, generating a first SNPN registration request based on the SNPN ID and the first SUPI to attempt registration with a first SNPN associated with the SNPN ID, and updating a second list with the SNPN ID, the first SUPI, and a SNPN parameter value corresponding to the first SNPN upon successful registration.

Abstract: A method for communication by a UE in a wireless communication system is provided.

Abstract: Present disclosure relates to a method and a UE for releasing PDU session. The UE identifies that the UE is in a restricted service area. Upon identifying that the UE is in the restricted service area, the UE releases PTI allocated by the UE and performs a local release of the PDU session. Further, the UE provides, to a network, information related to the PDU session, based on a subsequent trigger of a registration procedure.

Abstract: A method for re-evaluating one or more user equipment route selection policy (URSP) rules associated with a user equipment (UE) in communication with a network entity is disclosed. The method comprises receiving, at a user equipment non-access stratum (UE NAS) layer, a back-off timer from the network entity. The back-off timer is related to non-initiation of a packet data unit (PDU) session associated with an application within the UE. The method comprises initiating, by the UE, the PDU session associated with the application. The method comprises indicating, by the UE NAS layer, an expiry of the back-off timer. The method comprises, upon the expiry of the back-off timer, re-evaluating, by the UE, the one or more URSP rules to determine whether a change of association of the PDU session with the application is required.

Abstract: Embodiments herein provide a method for maintaining service continuity by a User Equipment (UE) in a wireless communication system. The method includes transmitting a registration request message or a tracking area update (TAU) message to a management entity of a first radio access technology (RAT) network, when the UE is registered in the first RAT network and a second RAT network; receiving, from the management entity, a registration reject message or a TAU reject message; and transmitting, to the management entity, a registration message for initial registration or an attach request message including a registration status information of the UE of the second RAT network.

Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a user equipment (UE) in a mobile communication system is provided. The method comprises receiving, from an access management function (AMF) entity via a base station, a configuration update command message in case that the UE supporting a multi universal subscriber identity module (MUSIM) feature is not registered for an emergency service, and disabling the MUSIM features based on the received configuration update command message. The configuration update command message includes registration result information indicating that the UE supporting the MUSIM features is registered for the emergency service.

Abstract: Embodiments herein provide a wireless communication system for managing a network slice congestion. The wireless communication system includes a User Equipment (UE), operably coupled to a core network. The UE is configured to transmit a first NAS signaling message to the core network, wherein the first NAS signaling message comprises a specific network slide identity. The core network i configured to detect the network slice congestion in the wireless communication system. Further, the core network is configured to indicate the network slice congestion using a second NAS signaling message to the User Equipment (UE), wherein the second NAS signaling message comprising a reject cause value and a back off timer for the requested network slice identity.

Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate and to a method to handle rejected NSSAI area. The method includes receiving a NAS message indicating registration accept or registration reject with a reject cause. The reject cause indicating a S-NSSAI is not available in a subset of a current registration area where the reject cause is applied for a S-NSSAI. In an example, the method includes storing the rejected S-NSSAI in a rejected NSSAI for the subset of the current registration area. In another example, the method includes deleting a current registration area based on the subset of the current registration area where the reject cause is applied for the S-NSSAI. The UE considers a S-NSSAI part of the requested NSSAI as not applicable to current tracking area and S-NSSAI part of the requested NSSAI is allowed outside current tracking area.

Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. For example, the disclosure relates to a method for switching a data session for an application, implemented in a user equipment with dual SIM. The method includes: determining a User Equipment (UE) Route Selection Policy (URSP) rule for a primary Subscriber Identity Module (SIM) and a secondary SIM. The method includes detecting a trigger for switching the data session of the application to the secondary SIM based on determination of the URSP rule, wherein the trigger includes one of a matching traffic descriptor, a dedicated network slice, a Quality of Service (QoS) rule and a user preference. The method includes configuring the secondary SIM for the DDS based on the trigger; and switching the data session of the application to the secondary SIM for continuing the data session.

Abstract: The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system. Embodiments herein disclose methods for maintaining priority of a VPLMN during a PLMN selection procedure by a UE. The method includes ignoring a pre-configured priority for a VPLMN and considering the VPLMN as a lowest priority in response to determining that the UE has entered a state and the second SOR information is not received before the UE enters the state or the received second SOR information security check is not successful. The method includes considering a priority of the VPLMN as the pre-configured priority by not considering the VPLMN as a lowest priority and stopping the timer associated with the “first SOR security check not successful” in response to determining that the UE receives the second SOR information and a second SOR security check is successful before the UE enters the state.

Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose a wireless network and methods to maintain a MA PDU session at a NSACF entity. The method includes determining, by a SMF entity, that a PDU session is the MA PDU session based on an indication from a UE. Further, the method includes indicating, by the SMF entity, that the PDU session is the MA PDU session to the NSACF entity in response to determination. The wireless network may maintain the count accurately even though the PDU session is a MA PDU session.

Abstract: The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system. A method for Network slice admission control for interworking with an Evolved Packet Core Network (EPC) in a wireless network by a Session Management Function-Packet Data Network Gateway (SMF-PGW-C) is provided. The method includes detecting that at least one UE transfers a Packet Data Network (PDN) connection or a Protocol Data Unit (PDU) session from a N1 mode to a S1 mode during an intersystem change. Further, the method includes determining that an EPC counting is not required for a network slice of the wireless network. Further, the method includes transmitting a message to a Network Slice Admission Control Function (NSACF) in the wireless network to update or reduce a number of User Equipments (UEs) per network slice and a number of PDU sessions per network slice.

Abstract: Embodiments herein disclose UE based implementations to manage voice/video over new radio (VoNR)/EPSFB calls. In an embodiment, there can be a zero CQI reporting for indicating a signal deterioration during the VoNR call. In an embodiment, at least one of a Wi-Fi network or a dual SIM dual standby (DSDS) feature, a UE initiated fallback procedure and an internet bearer can be used for continuing the VoNR call. Various embodiments may reduce the call failures and manage calls on VoNR/5G which can be useful to the UE in volatile signal conditions.