The High level architecture for M2M includes a Device and Gateway Domain and a Network domain. • The Device and Gateway Domain is composed of the following elements: - M2M Device:A device that runs M2M Application(s) using M2M Service Capabilities. M2M Devices connect to Network Domain in the following manners: Case 1 "Direct Connectivity":M2M Devices connect to the Network Domain via the Access network. The M2M Device performs the procedures such as registration, authentication, authorization, management and provisioning with the Network Domain. The M2M Device may provide service to other devices (e.g. legacy) connected to it that are hidden from the Network Domain. Case 2 "Gateway as a Network Proxy":The M2M Device connects to the Network Domain via an M2M Gateway. M2M Devices connect to the M2M Gateway using the M2M Area Network. The. The M2M Gateway acts as a proxy for the Network Domain towards the M2M Devices that are connected to it.Examples of procedures that are proxied include: authentication, authorization, management, and provisioning. M2M Devices may be connected to the Networks Domain via multiple M2M Gateways. - M2M Area Network:provides connectivity between M2M Devices and M2M Gateways. Examples of M2M Area Networks include: Personal Area Network technologies such as IEEE 802.15.1 [i.3], Zigbee®, Bluetooth®, IETF ROLL, ISA100.11a, etc. or local networks such as PLC, M-BUS, Wireless M-BUS and KNX. - M2M Gateway:A gateway that runs M2M Application(s) using M2M Service Capabilities. The Gateway acts as a proxy between M2M Devices and the Network Domain. The M2M Gateway may provide service to other devices (e.g. legacy) connected to it that are hidden from the Network Domain.
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