| 摘要 |
The present invention includes the steps of: receiving, from a mobile terminal (UE) having moved from a management area of an exchange (SGSN #1) to a management area of an exchange (SGSN #2), a location update request signal including a temporary subscriber identifier, at the exchange (SGSN #2); sending, from the exchange (SGSN #2) having received the location update request signal to the exchange (SGSN #1), a communication path information request signal for requesting to get communication path information stored in the exchange (SGSN #1), by using a protocol corresponding to the communication path type indicated by the temporary subscriber identifier; and sending, from the exchange (SGSN #1) having received the communication path information request signal to the exchange (SGSN #2), a communication path information response signal including the communication path information, by using the same protocol as that of the communication path information request signal.
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