Patent ID: 8311535

Claim:
A method for controlling information trace, comprising: receiving, by a first core network element, a trace command that contains MSISDN number information of a traced user, the trace command further contains identification information of a wireless access network element that needs to start trace function and/or identification information of a second core network element that needs to start trace function; determining, by the first core network element, IMSI number information and/or IMEI number information corresponding to the MSISDN number information of the traced user, according to a corresponding relationship of user number information; and sending, by the first core network element, a trace command that contains the IMSI and/or IMEI number information of the traced user to a wireless access network element that needs to start trace function and/or a second core network element that needs to start trace function, according to the identification information of the wireless access network element and/or the identification information of the second core network element; wherein the trace command received by the first core network element further comprises a sending condition for sending a trace command to the wireless access network element and/or second core network element; and when the corresponding sending condition is met, the first core network element sends a trace command that contains the IMSI and/or IMEI number information of the traced user to the wireless access network element and/or second core network element.