M2MMACHINE-TO-MACHINE METHOD FOR CHANGING GATEWAY IN MACHINE-TO-MACHINE M2M SYSTEM AND DEVICE THEREFOR

摘要

The present invention relates to a gateway changing method performed by an M2M gateway communicating with at least one M2M device having a constrained capability in an M2M (Machine-to-Machine) system including a first layer and a second layer, The method comprising: receiving a trigger signal indicating a gateway change through a first layer of the M2M gateway; And sending a first notification to the M2M server indicating a gateway change via a first layer of the M2M gateway, wherein the M2M device with limited capability is a device that does not have the first layer, Wherein the data generated in the second layer of the M2M device having the first data structure is managed or stored in a data structure of a tree structure by the first layer of the M2M gateway, And more particularly to a method and an apparatus therefor for the data structure containing data to be retrieved by the M2M server.