| CPC H04W 76/12 (2018.02) [H04W 16/02 (2013.01)] | 20 Claims |

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1. A method comprising:
receiving, by a policy control function (PCF) from a session management function (SMF), a first message requesting policy establishment for a first packet data unit (PDU) session of a wireless device, the first message comprising:
a first single-network slice selection assistance information (S-NSSAI); and
a first network slice instance identifier (NSI ID) for the first S-NSSAI;
receiving, by the PCF, a second message comprising an identifier of a communication service provider (CSP ID);
mapping, by the PCF, the first NSI ID to the CSP ID; and
selecting, by the PCF, a charging function (CHF) for the first PDU session per CSP based on the mapping.
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