A wireless communication method executed by a standby policy and charging control function device, comprising: receiving an authentication authorization request message sent by an application function; and obtaining, from a standby subscription profile repository based on an internet protocol address carried in the authentication authorization request message, internet protocol address connectivity access network session information corresponding to the authentication authorization request message, wherein before the obtaining, from a standby subscription profile repository based on an internet protocol address carried in the authentication authorization request message, internet protocol address connectivity access network session information corresponding to the authentication authorization request message, the method further comprises: determining that an internet protocol address connectivity access network session corresponding to the authentication authorization request message does not exist on the standby policy and charging control function device, wherein after the obtaining, from a standby subscription profile repository based on an internet protocol address carried in the authentication authorization request message, internet protocol address connectivity access network session information corresponding to the authentication authorization request message, the method further comprises: obtaining from the standby subscription profile repository, subscription information of user equipment corresponding to the internet protocol address; determining a quality of service control rule based on the authentication authorization request message and the subscription information of the user equipment; determining a policy and charging enforcement function device based on the internet protocol address connectivity access network session information; and sending a user re-authentication/re-authorization message to the determined policy and charging enforcement function device, wherein the user re-authentication/re-authorization message comprises the quality of service control rule and an identifier of the standby policy and charging control function device. receiving an authentication authorization request message sent by an application function; and obtaining, from a standby subscription profile repository based on an internet protocol address carried in the authentication authorization request message, internet protocol address connectivity access network session information corresponding to the authentication authorization request message, wherein before the obtaining, from a standby subscription profile repository based on an internet protocol address carried in the authentication authorization request message, internet protocol address connectivity access network session information corresponding to the authentication authorization request message, the method further comprises: determining that an internet protocol address connectivity access network session corresponding to the authentication authorization request message does not exist on the standby policy and charging control function device, wherein after the obtaining, from a standby subscription profile repository based on an internet protocol address carried in the authentication authorization request message, internet protocol address connectivity access network session information corresponding to the authentication authorization request message, the method further comprises: obtaining from the standby subscription profile repository, subscription information of user equipment corresponding to the internet protocol address; determining a quality of service control rule based on the authentication authorization request message and the subscription information of the user equipment; determining a policy and charging enforcement function device based on the internet protocol address connectivity access network session information; and sending a user re-authentication/re-authorization message to the determined policy and charging enforcement function device, wherein the user re-authentication/re-authorization message comprises the quality of service control rule and an identifier of the standby policy and charging control function device. obtaining from the standby subscription profile repository, subscription information of user equipment corresponding to the internet protocol address; determining a quality of service control rule based on the authentication authorization request message and the subscription information of the user equipment; determining a policy and charging enforcement function device based on the internet protocol address connectivity access network session information; and sending a user re-authentication/re-authorization message to the determined policy and charging enforcement function device, wherein the user re-authentication/re-authorization message comprises the quality of service control rule and an identifier of the standby policy and charging control function device.