Abstract: A method for handling a PDU session release command for releasing an MA PDU session with a PDN connection established as user-plane resource on 3GPP access is proposed. For an MA PDU session with both EPS/4G 3GPP leg and 5GS non-3GPP leg, if UE/NW wants to release the MA PDU session, UE/NW needs to initiate two procedures. First/Second, to release the EPS 3GPP leg, UE/NW should initiate a PDN disconnect procedure/deactivate EPS bearer context procedure or a detach procedure. Second/First, to release the 5GS non-3GPP leg, UE/NW should initiate a PDU session release procedure. The UE/NW can also initiate two procedures simultaneously. It is also possible that the UE initiates one procedure and the NW initiates the other procedure.

Abstract: Aspects of the disclosure provide methods and apparatuses. The method can include receiving, at a user equipment (UE), system information broadcast from a base station which may be shared by one or more PLMNs and SNPNs, the system information including an indication of whether accessing an SNPN using home service provider (HSP) subscription of a HSP network is supported. The UE can be configured with subscription information of the HSP network. The subscription information can include the HSP subscription and a home SP selection list that includes one or more candidate networks each represented by an SNPN identifier. The method can further include responsive to the system information, selecting a network from the home SP selection list according to a priority order of the candidate networks, and accessing the network selected from the home SP selection list using the HSP subscription.

Abstract: A method for evaluation of UE route selection policy (URSP) rules is proposed. URSP is used by a UE to determine if a detected application can be associated to an established PDU session, can be offloaded to non-3GPP access outside a PDU session, or can trigger the establishment of a new PDU session. The UE first finds a non-default URSP rule with a matching traffic descriptor to the application. Then, the UE selects a route selection descriptor including a preferred access type from a list of RSDs of the non-default URSP rule. After that, the UE matches or establishes a Protocol Data Unit (PDU) session for the application by ignoring the preferred access type or using the preferred access type.

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session handover is proposed. A UE and network can support Access Traffic Steering Switching and Splitting (ATSSS) functionalities to distribute traffic over 3GPP access and non-3GPP access for the established MA PDU session. An ATSSS-Supported UE first establishes a MA PDU Session on both 3GPP and non-3GPP access in a currently registered PLMN which is an ATSSS-Supported network. The UE then moves from the ATSSS-Supported network to an ATSSS-not-Supported network and finally reaches another ATSSS-Supported network. In one novel aspect, a solution is provided on how to handle the ongoing MA PDU Session with two accesses under handover scenarios between ATSSS-Supported and ATSSS-not-Supported networks. Furthermore, if the ongoing MA PDU Session cannot handover, a solution is provided on how to handle the MA PDU Session.

Abstract: A method of handling authentication reject upon accessing an SNPN using credentials from a credential holder is proposed. A UE is configured with a “list of subscriber data”. The UE selects an SNPN using the configured list of subscriber data, e.g., based on the SNPN selection parameters contained in a selected entry of the list of subscriber data. Based on the selected entry, the UE selects an SNPN, and then tries to access the selected SNPN using credentials supplied by a subscribed SNPN. When UE receives an authentication reject message from the network, UE considers that the selected entry of the list of subscriber data is invalid. However, other entries related to the current selected SNPN are still valid. UE is still able to access the current selected SNPN, using credentials supplied in another entry of the list of subscriber data.

Abstract: A method to facilitate onboarding registration via an onboarding network (ON) that is a stand-alone non-public network (ON-SNPN) is proposed. A UE is preconfigured with default UE credentials for Onboarding. UE discovers and selects an ON-SNPN and registers to the ON-SNPN using default UE credentials. Both user plane (UP) and control plane (CP) provisioning procedure can be used to obtain the SNPN credentials from a subscriber owner (SO) via an ON-SNPN access connectivity. In accordance with one novel aspect, when UE sends a registration request for UE onboarding registration, the registration request comprises information for registration type (e.g., SNPN ONBOARDING), and UE supported provisioning procedure (e.g., CP, UP, or both). Upon successful registration, UE follows the supported provisioning procedure (i.e., CP or UP) decided by the ON-SNPN to obtain the SNPN credentials from the SO-SNPN via the ON-SNPN access connectivity to a Provisioning Server (PVS).

Abstract: A method supporting enhanced network identity (NID) provisioning under User Equipment (UE) mobility scenarios between different types of networks is proposed. When a UE registers to an SNPN, the UE is assigned with a 5G-GUTI by the SNPN. The SNPN is identified by an SNPN ID==PLMN ID+NID. When the UE moves from the SNPN to another target network having a target AMF, the UE triggers a mobility registration update procedure and provides the 5G-GUTI along with NID information in a Registration Request to the target AMF. The target AMF can use the NID information along with the 5G-GUTI to find a source AMF for deriving UE context for the subsequent operations during the mobility registration update procedure. Providing NID information along with 5G-GUTI can assist the target AMF to find the source AMF efficiently, preventing a potential registration procedure failure.

Abstract: A method of enhanced handling of a Forbidden SNPN list by a UE is proposed. When the UE registers to a first SNPN using credentials supplied by a second SNPN and receives a rejection from the network, the UE adds an entry of the first SNPN into one of the forbidden SNPN lists, and also creates an association between the first SNPN and the second SNPN. As a result, the UE is refrained from registering to the first SNPN using the credentials supplied by the second SNPN as long as the first SNPN entry remains in the forbidden SNPN list. However, the UE is allowed to register to the first SNPN using credentials supplied by other SNPNs.

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session establishment procedure with multiple PDU SESSION ESTABLISHMENT ACCEPT messages by a UE is proposed. In one novel aspect, upon receiving a second PDU SESSION ESTABLISHMENT ACCEPT message over the other access, the UE deletes the stored authorized QoS rules, and deletes the stored authorized QoS flow descriptions and the stored mapped EPS bearer contexts if they are included in the PDU SESSION ESTABLISHMENT ACCEPT message. In another novel aspect, upon receiving a second PDU SESSION ESTABLISHMENT ACCEPT message over the other access, the UE performs a local release of the MA PDU session if any value of the selected PDU session type, selected SSC mode, 5GSM cause, PDU address, S-NSSAI, DNN IEs in the PDU SESSION ESTABLISHMENT ACCEPT message is different from the corresponding stored value.

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session under inter-system change is proposed. An MA PDU session uses one 3GPP access network or one non-3GPP access network at a time, or simultaneously one 3GPP access network and one non-3GPP access network. The UE and network can support Access Traffic Steering Switching and Splitting (ATSSS) functionalities to distribute traffic over 3GPP access and non-3GPP access for the established MA PDU session. Upon intersystem change from 5GS to EPS over the 3GPP access, the 3GPP part of an MA PDU session is transferred to a PDN connection, and the non-3GPP part of the MA PDU session is released. The QoS flows of the MA PDU session over both 3GPP access type and non-3GPP access type are transferred to the EPS bearer contexts of the corresponding PDN connection.

Abstract: Aspects of the disclosure provide methods and apparatuses. The method can include receiving, at a user equipment (UE), system information broadcast from a base station which may be shared by one or more PLMNs and SNPNs, the system information including an indication of whether accessing an SNPN using home service provider (HSP) subscription of a HSP network is supported. The UE can be configured with subscription information of the HSP network. The subscription information can include the HSP subscription and a home SP selection list that includes one or more candidate networks each represented by an SNPN identifier. The method can further include responsive to the system information, selecting a network from the home SP selection list according to a priority order of the candidate networks, and accessing the network selected from the home SP selection list using the HSP subscription.

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session under inter-system change is proposed. An MA PDU session uses one 3GPP access network or one non-3GPP access network at a time, or simultaneously one 3GPP access network and one non-3GPP access network. The UE and network can support Access Traffic Steering Switching and Splitting (ATSSS) functionalities to distribute traffic over 3GPP access and non-3GPP access for the established MA PDU session. Upon intersystem change from 5GS to EPS over the 3GPP access, if interworking with EPS is not supported, the MA PDU session is maintained in 5GS over the non-3GPP access type. Data traffic over of the MA PDU session over the 3GPP access type is transferred to the non-3GPP access type.

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session handover is proposed. A UE and network can support Access Traffic Steering Switching and Splitting (ATSSS) functionalities to distribute traffic over 3GPP access and non-3GPP access for the established MA PDU session. An ATSSS-Supported UE first establishes a MA PDU Session on both 3GPP and non-3GPP access in a currently registered PLMN which is an ATSSS-Supported network. The UE then moves from the ATSSS-Supported network to an ATSSS-not-Supported network and finally reaches another ATSSS-Supported network. In one novel aspect, a solution is provided on how to handle the ongoing MA PDU Session with two accesses under handover scenarios between ATSSS-Supported and ATSSS-not-Supported networks. Furthermore, if the ongoing MA PDU Session cannot handover, a solution is provided on how to handle the MA PDU Session.

Abstract: A method for evaluation of UE route selection policy (URSP) rules is proposed. URSP is used by a UE to determine if a detected application can be associated to an established PDU session, can be offloaded to non-3GPP access outside a PDU session, or can trigger the establishment of a new PDU session. The UE first finds a non-default URSP rule with a matching traffic descriptor to the application. Then, the UE selects a route selection descriptor including a preferred access type from a list of RSDs of the non-default URSP rule. After that, the UE matches or establishes a Protocol Data Unit (PDU) session for the application by ignoring the preferred access type or using the preferred access type.

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session under inter-system change is proposed. An MA PDU session uses one 3GPP access network or one non-3GPP access network at a time, or simultaneously one 3GPP access network and one non-3GPP access network. The UE and network can. support Access Traffic Steering Switching and Splitting (ATSSS) functionalities to distribute traffic over 3GPP access and non-3GPP access for the established MA PDU session. Upon intersystem change from 5GS to EPS over the 3GPP access, the 3GPP part of an MA PDU session is transferred to a PDN connection, and the non-3GPP part of the MA PDU session is released. The QoS flows of the MA PDU session over both 3GPP access type and non-3GPP access type are transferred to the EPS bearer contexts of the corresponding PDN connection.

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session under inter-system change is proposed. An MA. PDU session uses one 3GPP access network or one non-3GPP access network at a time, or simultaneously one 3GPP access network and one non-3GPP access network. The UE and network can support Access Traffic Steering Switching and Splitting (ATSSS) functionalities to distribute traffic over 3GPP access and non-3GPP access for the established MA PDU session. Upon intersystem change from 5GS to EPS over the 3GPP access, if interworking with EPS is not supported, the MA PDU session is maintained in 5GS over the non-3GPP access type. Data traffic over of the MA PDU session over the 3GPP access type is transferred to the non-3GPP access type.

Abstract: In an aspect, the disclosure provides a method for distributing uplink data flow between different access networks in a 5G communication system. The method would include not limited to maintaining an ATSSS rules table; receiving a request to establish an uplink data flow to a DN; determining from the ATSSS rule table whether the DN is in the ATSSS rule table in response to receiving the request to establish the uplink data flow to the DN; selecting a first PDU session from the ATSSS rule table for the uplink data flow to the DN in response to having been determined that the DN is in the ATSSS rule table; and creating a second PDU session for the uplink data flow to the DN and recording the second PDU session in the ATSSS rule table in response to having been determined that the DN is not in the ATSSS rule table.

Abstract: A method of providing LAN service based on a 5G communication network and a terminal device and a server using the same are provided. The method adapted to the terminal device includes: receiving a service ID list broadcasted by the 5G communication network; registering to an isolated 5G core network according to the service ID list so as to obtain an allowed service ID list; transmitting a request message according to the allowed service ID list so as to obtain packet data unit (PDU) session establishment parameter(s) corresponding to a service group in the isolated 5G core network; and communicating with an electronic device in the service group according to the PDU session establishment parameter(s).

Abstract: A method for accessing a network slice and a user equipment using the same are provided. The method for accessing a network slice includes: transmitting a request message to a 5G communication network; receiving, from the 5G communication network, allowed network slice selection assistance information in response to the request message; obtaining mutually exclusive network slices information according to the allowed network slice selection assistance information; and establishing multiple sessions respectively corresponding to multiple network slices according to the mutually exclusive network slices information.

Abstract: A method for establishing ultra-reliable transmission in a 5G communication network, which is adapted to a UE supporting a first radio access technology and a second radio access technology. The method includes: transmitting a request message to the 5G communication network, wherein the request message includes a multi-data-path indication; receiving setup information from the 5G communication network in response to transmitting the request message to the 5G communication network; and establishing a first data path according to the setup information.