Provided is a communication unit for implementing functions for URLLC that requires communication of high reliability and/or low latency in the 5GS. Provided is a communication unit for enabling functions for URLLC even in the 5GS that supports a network-initiated configuration update procedure and multiple types of session and service continuity. Further, provided is a communication unit for, in a case that multiple types of functions for URLLC are possible, sharing which function out of the functions for URLLC is available and appropriately managing shared information between a user equipment and a network.

A first carrier may support inbound roaming requests for subscribers of a trusted second carrier. For example, the first carrier may receive an inbound roaming request from a UE. The first carrier may determine a second carrier that is a home carrier of the UE is a trusted carrier associated with the first carrier. In response, an IMS procedure associated with the UE may be performed including communicating, by a first CSCF node of the first carrier, with a first HSS of the second carrier, using a same protocol as used by the first CSCF node to communicate with a second HSS of the first carrier and communicating, by the first CSCF node, with a first AS of the second carrier, using a same protocol as used by the first CSCF node to communicate with a second AS of the first carrier.

A method for managing wireless device communications including establishing active, persistent, and repetitive communications with a wireless device operating in a coverage area of a local wireless network. In an example, the local wireless network is an overlay to a portion of a macro wireless network. The repetitive communications include placing a call to the wireless device, completing a call connection to the wireless device, sending a message to the wireless device, receiving and processing a response to the message from the wireless device, and persistently repeating a call function of the placing a call, completing a connection, sending a response, and receiving and processing the response until a specified termination event. In an example, the termination event is a power off of the wireless device.

A method for managing wireless device communications including establishing active, persistent, and repetitive communications with a wireless device operating in a coverage area of a local wireless network. In an example, the local wireless network is an overlay to a portion of a macro wireless network. The repetitive communications include placing a call to the wireless device, completing a call connection to the wireless device, sending a message to the wireless device, receiving and processing a response to the message from the wireless device, and persistently repeating a call function of the placing a call, completing a connection, sending a response, and receiving and processing the response until a specified termination event. In an example, the termination event is a power off of the wireless device.

Certain aspects of the present disclosure relate to methods and apparatus for handling mobility between areas with heterogeneous network slices in wireless communications systems operating according to new radio (NR) technologies. An exemplary method that may be performed by a UE includes receiving an indication that a network slice is not available, entering a connection management idle (CM-IDLE) state, and initiating a registration procedure with an access and mobility management function (AMF) subsequent to entering the CM-IDLE state.

Certain aspects of the present disclosure relate to methods and apparatus for handling mobility between areas with heterogeneous network slices in wireless communications systems operating according to new radio (NR) technologies. An exemplary method that may be performed by a UE includes receiving an indication that a network slice is not available, entering a connection management idle (CM-IDLE) state, and initiating a registration procedure with an access and mobility management function (AMF) subsequent to entering the CM-IDLE state.

A method of executing a service for a service consumer, said service consumer being registered in a home telecommunication network and currently residing in a visited telecommunication network, said method comprising the steps of retrieving a list of available services within the home telecommunication network that said service consumer is allowed to access, wherein said SDVN function and said home NRF both reside in said home telecommunication network, receiving a service operation message requesting an operation execution within a particular service for said service consumer in said visited telecommunication network, determining that said home network is able to provide for said requested particular service based on said retrieved list of available service, and selecting one or more service instances for executing said operation within said particular service for said service consumer.

A method of executing a service for a service consumer, said service consumer being registered in a home telecommunication network and currently residing in a visited telecommunication network, said method comprising the steps of retrieving a list of available services within the home telecommunication network that said service consumer is allowed to access, wherein said SDVN function and said home NRF both reside in said home telecommunication network, receiving a service operation message requesting an operation execution within a particular service for said service consumer in said visited telecommunication network, determining that said home network is able to provide for said requested particular service based on said retrieved list of available service, and selecting one or more service instances for executing said operation within said particular service for said service consumer.

A wireless communication method is provided to comprise: receiving, by a first computing device, a notification that a wireless communication device that has previously established a protocol data unit session via a first network access has registered for a second network access; and establishing, by the first computing device, one or more quality of service (QoS) flows for the protocol data unit session for the wireless communication device over the second network access by transmitting, to a second computing device, a message that includes information to associate the one or more quality of service (QoS) flows with the second network access, and wherein the first computing device is configured to carry out a session management function and the second computing device is configured to carry out an access and mobility management function.

A wireless communication method is provided to comprise: receiving, by a first computing device, a notification that a wireless communication device that has previously established a protocol data unit session via a first network access has registered for a second network access; and establishing, by the first computing device, one or more quality of service (QoS) flows for the protocol data unit session for the wireless communication device over the second network access by transmitting, to a second computing device, a message that includes information to associate the one or more quality of service (QoS) flows with the second network access, and wherein the first computing device is configured to carry out a session management function and the second computing device is configured to carry out an access and mobility management function.