Communication related to network slice

1 . A method comprising:

receiving, by an access mobility management node, a first registration request message from a user equipment (UE),

wherein the first registration request message includes requested network slice information which corresponds to one or more network slices with which the UE intends to register; and

transmitting, by the access mobility management node, a registration accept message to the UE,

wherein the registration accept message includes allowed network slice information,

wherein the first registration request message includes network slice quota information related to support of a network slice quota function,

wherein the method further comprises:

i) determining, by the access mobility management node, that the network slice quota function is applied based on the network slice quota information;

ii) determining, by the access mobility management node, a network slice quota by exchanging information with a network slice quota management node,

wherein the registration accept message further includes allowed candidate network slice information based on the UE not being able to access a first network slice due to the network slice quota applied to the first network slice,

wherein the allowed candidate network slice information the first network slice;

iii) determining, by the access mobility management node, whether the network slice quota applied to the first network slice has been resolved; and

iv) transmitting, by the access mobility management node, updated allowed network slice information including the first network slice to the UE, based on the network slice quota applied to the first network slice being resolved,

wherein the UE is allowed to access the first network slice based on the updated allowed network slice information.

2 . The method of claim 1 ,

wherein the network slice quota applied to the first network slice is a maximum number of UEs that can access the first network slice.

3 . The method of claim 2 ,

when the number of UEs connected to the first network slice is equal to or greater than the maximum number, it is determined that the UE cannot access the first network slice due to the network slice quota applied to the first network slice.

4 . The method of claim 1 , further comprising:

receiving a second registration request message requesting access to the first network slice from the UE.

5 . The method of claim 4 ,

wherein the second registration request message includes information indicating that the policy for the allowed candidate network slice has been changed.

6 . The method of claim 4 ,

based on the second registration request message being received, re-determining whether the UE can access the first network slice.

7 . An access management node comprising:

at least one processor; and

at least one memory for storing instructions and operably electrically connectable with the at least one processor;

wherein the operations performed based on execution of the instructions by the at least one processor include:

receiving a first registration request message from a user equipment (UE),

wherein the first registration request message includes requested network slice information which corresponds to one or more network slices with which the UE intends to register; and

transmitting a registration accept message to the UE,

wherein the registration accept message includes allowed network slice information,

wherein the first registration request message includes network slice quota information related to support of a network slice quota function,

wherein the operations further comprise:

i) determining that the network slice quota function is applied based on the network slice quota information;

ii) determining a network slice quota by exchanging information with a network slice quota management node,

wherein the registration accept message further includes allowed candidate network slice information based on the UE not being able to access a first network slice due to the network slice quota applied to the first network slice,

wherein the allowed candidate network slice information includes the first network slice;

iii) determining whether the network slice quota applied to the first network slice has been resolved; and

iv) transmitting updated allowed network slice information including the first network slice to the UE, based on the network slice quota applied to the first network slice being resolved,

wherein the UE is allowed to access the first network slice based on the updated allowed network slice information.

8 . A method comprising:

transmitting, by a user equipment (UE), a first registration request message to an access management node,

wherein the first registration request message includes requested network slice information which corresponds to one or more network slices with which the UE intends to register;

receiving, by the UE, a registration accept message from the access management node,

wherein the registration accept message includes allowed network slice information,

wherein the first registration request message includes network slice quota information related to support of a network slice quota function,

wherein it is determined that the network slice quota function is applied based on the network slice quota information,

wherein the registration accept message further includes allowed candidate network slice information based on the UE not being able to access a first network slice due to a network slice quota applied to the first network slice, and

wherein the allowed candidate network slice information includes the first network slice; and

receiving, by the UE, updated allowed network slice information including the first network slice from the access management node, based on the network slice quota applied to the first network slice being resolved,

wherein the UE is allowed to access the first network slice based on the updated allowed network slice information.

9 . The method of claim 8 ,

wherein the network slice quota applied to the first network slice is a maximum number of UEs that can access the first network slice.

10 . The method of claim 8 , further comprising:

transmitting a second registration request message for requesting access to the first network slice, which is a candidate network slice, to the access management node,

wherein the second registration request message includes information indicating that the policy for the allowed candidate network slice has been changed.

11 . The method of claim 8 , further comprising:

based on the allowed candidate network slice information, displaying information indicating that the first network slice cannot be accessed on a display of the UE.

12 . The method of claim 8 ,

wherein the allowed candidate network slice information includes waiting time information, and

wherein information indicating waiting time based on the waiting time information is displayed together with information indicating that the first network slice cannot be accessed.