CONTROL OF NETWORK SLICE
A visited session management function sends, to a home session management function, a request of a wireless device for a packet data unit session in a network slice. The visited session management function receives, from the home session management function, a cause value indicating that a network slice quota has been reached for a number of packet data unit sessions for the network slice.
1 - 20 . (canceled)
21 . A method, comprising:
receiving, by a home session management function (SMF) from a visited SMF, a request of a wireless device for establishing a packet data unit (PDU) session in a network slice;
determining, at the home SMF, that the request of the wireless device for establishing the PDU session in the network slice is due to a handover between third generation partnership project (3GPP) access and non-3GPP access; and
sending, by the home SMF to the visited SMF, a cause value indicating that a network slice quota has been reached for a number of PDU sessions for the network slice.
22 . The method of claim 21 , wherein sending the cause value comprises sending a message indicating rejection of the request by the home SMF.
23 . The method of claim 21 , wherein sending the cause value comprises sending a message comprising:
the cause value;
an allowed network slice identifier of a home public land mobile network (PLMN) of the home SMF; and
a re-attempt indicator indicating for the wireless device to re-attempt to establish a second PDU session based on the allowed network slice identifier of the home PLMN.
24 . The method of claim 21 , further comprising sending, by the home SMF to a network function, a message subscribing an event of the network slice quota.
25 . The method of claim 24 , wherein the message subscribing the event comprises a single network slice selection assistance information (S-NSSAI) of the network slice.
26 . The method of claim 21 , further comprising receiving, by the home SMF from a network function, a message notifying an event.
27 . The method of claim 26 , wherein the message notifying the event comprises a single network slice selection assistance information (S-NSSAI) of the network slice.
28 . The method of claim 26 , wherein the message notifying the event further comprises an action of the home SMF, wherein the action of the home SMF comprises rejecting the request of the wireless device for establishing the PDU session in the network slice.
29 . The method of claim 28 , further comprising determining, by the home SMF and based on the message notifying the event, to reject the request of the wireless device for establishing the PDU session in the network slice.
30 . The method of claim 28 , wherein the action of the home SMF further comprises determining an allowed network slice for the PDU session.
31 . The method of claim 26 , further comprising determining, by the home SMF and based on the message, an allowed network slice for the PDU session.
32 . The method of claim 31 , wherein the network function comprises at least one of:
a network data analytics function (NWDAF); or
an operation administration and maintenance (OAM).
33 . The method of claim 31 , wherein the event comprises the network slice quota being reached for the number of PDU sessions for the network slice.
34 . The method of claim 31 , wherein the event comprises the network slice quota being reached for a number of wireless devices for the network slice.
35 . The method of claim 21 , wherein the request comprises one or more of:
a visited network slice identifier of a network slice of a visited public land mobile network (PLMN); and
a home network slice identifier of a network slice of a home PLMN.
36 . A baseband processing unit for a home session management function (SMF), the baseband processing unit comprising:
one or more processors; and
memory comprising instructions that, when executed by the one or more processors, cause the home SMF to:
receive, at the home SMF of a home public land mobile network (PLMN) of a wireless device from a visited SMF of a visited PLMN of the wireless device, a request of the wireless device for establishing a packet data unit (PDU) session in a network slice;
determine, at the home SMF, that the request of the wireless device for establishing the PDU session in the network slice is due to a handover between third generation partnership project (3GPP) access and non-3GPP access; and
send, from the home SMF to the visited SMF, a cause value indicating that a network slice quota has been reached for a number of PDU sessions for the network slice.
37 . The baseband processing unit of claim 36 , wherein the memory comprising the instructions that, when executed by the one or more processors, further cause the home SMF to send, by the home SMF to a network function, a message subscribing an event of the network slice quota.
38 . The baseband processing unit of claim 37 , wherein the message subscribing the event comprises a single network slice selection assistance information (S-NSSAI) of the network slice.
39 . The baseband processing unit of claim 36 , wherein the memory comprising the instructions that, when executed by the one or more processors, further cause the home SMF to receive, by the home SMF from a network function, a message notifying an event.
40 . The baseband processing unit of claim 39 , wherein the message notifying the event comprises a single network slice selection assistance information (S-NSSAI) of the network slice.