IMS 中private user id/public user id的格式

private user identity(IMPI)的格式为 "<IMSI>@ims.mnc<MNC>.mcc<MCC>.3gppnetwork.org"

public user identity SIP URI 格式为 sip:username@domain；而Tel URI 格式为 tel:+<CC><NDC><SN>

temporary public user identity和private user identity格式相关，private user identity(IMPI)的格式为 "<IMSI>@ims.mnc<MNC>.mcc<MCC>.3gppnetwork.org"；而temporary public user identity(T IMPU)的格式为: sip:<IMSI>@ims.mnc<MNC>.mcc<MCC>.3gppnetwork.org。

上述内容来自TS 23.003。