Patent ID: 8811290

Claim:
A method for transmitting, by a base station, a paging message in a wireless communication system, the method comprising: receiving, by the base station, a paging announcement from a paging controller, the paging announcement including a machine-to-machine (M2M) group identity (ID) allocated by a first network entity, the first network entity managing a first M2M zone; transmitting the paging message from the base station to an M2M device, an M2M group ID allocated to the M2M device by a second network entity being the same as the M2M group ID included in the paging announcement, the second network entity managing a second M2M zone, the paging message including a M2M zone ID of the first M2M zone allocated by the first network entity or a network entity ID of the first network entity, wherein the M2M device is located in an area where the first M2M zone and the second M2M zone overlap, and wherein the M2M device determines whether the paging message is a false paging message for the M2M device itself by using the M2M zone ID or the network entity ID included in the paging message; if the false paging message is determined by the M2M device, receiving a ranging request message from the M2M device, the ranging request message including a device ID of the M2M device and a ciphered-based media access control (CMAC) tuple; after receiving the ranging request, performing a CMAC verification according to a context received from an authenticator; and if the CMAC verification fails and if the paging message is determined as the false paging message, transmitting a ranging response message to the M2M device, the ranging response message including an indicator which requests to the M2M device for keeping an idle mode.