Patent ID: 8867489

Claim:
A mobile communication method comprising the steps of: receiving, from a terminal having moved from a management area of a first node to a management area of a second node, a location update message at the second node, wherein the first node is able to support both GTPv1 (GTP protocol, version 1) and GTPv2 (GTP protocol, version 2 and the first node is able to establish both a GPRS (general packet radio service) bearer with a GGSN (gateway GPRS support node) and an EPS (evolved packet system) bearer with an S-GW (serving gateway); sending, from the second node having received the location update message to the first node, a GTPv2 signal for getting bearer information; notifying, from the first node to the second node, an error for causing a fallback to the GTPv1 by the GTPv2 signal, when the first node establishes the GPRS bearer with the GGSN as a bearer for the terminal; and changing a protocol type to the GTPv1, at the second node to which the error has been notified from the first node by the GTPv2 signal, and sending again a protocol signal for getting bearer information to the first node by the changed protocol type.