| CPC H04W 68/005 (2013.01) [H04W 28/0865 (2023.05); H04W 68/02 (2013.01); H04W 76/28 (2018.02); H04W 84/027 (2013.01); H04W 4/60 (2018.02)] | 20 Claims |

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1. A method comprising:
receiving, by a base station of a first public land mobile network (PLMN) from a wireless device, a requested international mobile subscriber identity (IMSI) offset value for offsetting an IMSI of the wireless device;
sending, by the base station to a core network node, the requested IMSI offset value;
receiving, by the base station from the core network node, an accepted IMSI offset value for offsetting the IMSI of the wireless device, wherein first paging occasions of the first PLMN are derived using an alternative IMSI determined based on a sum of:
the IMSI of the wireless device; and
the accepted IMSI offset value; and
sending, by the base station to the wireless device, the accepted IMSI offset value.
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