| CPC H04W 12/08 (2013.01) [H04W 12/106 (2021.01); H04W 48/02 (2013.01); H04W 48/08 (2013.01); H04W 76/30 (2018.02)] | 23 Claims |

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1. A method, comprising:
obtaining, by an access and management apparatus, an updated closed access group (CAG) list for a terminal apparatus, wherein the updated CAG list comprises a set of CAG identifiers (IDs) of CAG cells that the terminal apparatus is allowed to access;
receiving, by the access and mobility management apparatus, an access request of the terminal apparatus, wherein the access request comprises a registration request or a service request; and
in response to determining that a cell currently accessed by the terminal apparatus is not in the updated CAG list, sending, by the access and mobility management apparatus, response information to the terminal apparatus to reject the access request,
wherein the response information comprises the updated CAG list.
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