| CPC H04W 48/18 (2013.01) [H04W 48/16 (2013.01); H04W 60/04 (2013.01); H04L 41/00 (2013.01)] | 16 Claims |

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1. A Wireless Transmit/Receive Unit (WTRU), comprising
a processor, a memory, and communication circuitry communicating with a network, the memory comprising computer-executable instructions which, when executed by the processor, cause the WTRU to perform operations comprising:
sending, to the network, a request, the request indicating a first requested Network Slice Selection Assistance Information (NSSAI), the request further indicating that the WTRU is capable of receiving Simultaneous Slice Access Capability (SSAC) information;
receiving, from the network, a message comprising information about a registration group, and an indication that the requested NSSAI is associated with the registration group, the message further comprising SSAC information for one or more Single NSSAIs (S-NSSAIs), and wherein the SSAC information indicates that a first S-NSSAI may not be used with network slices that are not part of the registration group; and
determining to control access to the network in accordance with the message.
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