Method for supporting the mobility of a device in a 6lowpan-based wireless sensor network

A method of supporting mobility of a device in a sensor network based on Internet Protocol Version (IPv6, the method comprising the steps of:

• receiving, when an external device is moved to a personal area network of a home mapping server, a locator update request message containing an identifier and a locator of the external device from a gateway managing the personal area network;
• determining whether or not the external device is an external device registered in an external mapping server based on the identifier of the external device;
• transmitting, if the external device is an external device registered in the external mapping server), the identifier of the external device to the device management server, and requesting inquiry of a locator of the external mapping server, in which the external device is registered;
• transmitting a locator change request message to the external mapping server, the locator change request message requesting a change of the locator of the external device, which contains a locator of the gateway and the identifier of the external device and is mapped to the identifier of the external device, to a location of the gateway;
• and
• receiving a locator change response message as a result of changing the locator of the external device from the external mapping server in response to the locator change request message, and transmitting a locator update response message to the gateway.