Support For Network Service

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:

• send, to an access and mobility function (AMF), a non-access stratum (NAS) message comprising:
• an establishment request for a first protocol data unit (PDU) session;
• and
• a network slice identifier of an allowed network slice within which the first PDU session is established, wherein the allowed network slice is a first network slice;
• receive, from the AMF, one or more messages comprising:
• allowed network slice identifiers indicating at least the first network slice and a fourth network slice;
• alternative network slice identifiers indicating at least a second network slice and a third network slice;
• and
• mapping information indicating at least:
• that the second network slice is an alternative network slice for the first network slice;
• and
• that the third network slice is an alternative network slice for the fourth network slice;
• and
• send, to the AMF, a second request message, for a second PDU session, indicating the alternative network slice for the first network slice.

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of an access and mobility management function (AMF), cause the AMF to:

• receive, from a wireless device, a non-access stratum (NAS) message comprising:
• an establishment request for a first protocol data unit (PDU) session;
• and
• a network slice identifier of an allowed network slice within which the first PDU session is established, wherein the allowed network slice is a first network slice;
• send, to the wireless device, one or more messages comprising:
• allowed network slice identifiers indicating at least the first network slice and a fourth network slice;
• alternative network slice identifiers indicating at least a second network slice and a third network slice;
• and
• mapping information indicating at least:
• that the second network slice is an alternative network slice for the first network slice;
• and
• that the third network slice is an alternative network slice for the fourth network slice;
• and
• receive, from the wireless device, a second request message, for a second PDU session, indicating the alternative network slice for the first network slice.