Update of security for group based feature in m2m

Abstract

A network node ( 21 ), which is placed within a core network, receives a message from a transmission source ( 30 ) placed outside the core network. The message includes an indicator indicating whether or not the message is addressed to a group of one or more MTC devices attached to the core network. The network node ( 21 ) determines to authorize the transmission source ( 30 ), when the indicator indicates that the message is addressed to the group. Further, the message includes an ID for identifying whether or not the message is addressed to the group. The MTC device determines to discard the message, when the ID does not coincide with an ID allocated for the MTC device itself. Furthermore, the MTC device communicates with the transmission source ( 30 ) by use of a pair of group keys shared therewith.

1 - 23 . (canceled) 
     
     
         24 . A system for an MTC (Machine-Type-Communication), comprising:
 a plurality of MTC devices that form a group;   a RAN (Radio Access Network);   an SCS (Services Capability Server) which serves a group message;   a first node that connects to the SCS; and   a second node that broadcasts the group message to the plurality of MTC devices;   wherein the SCS sends the group message including an external group ID and geography area information to the first node;   the first node checks that the SCS is authorized to send the group message;   the SCS sends the group message to the second node; and   the second node broadcasts the group message via the RAN to the plurality of MTC devices located in a particular geographical area.   
     
     
         25 . A delivery method of a system for an MTC (Machine-Type-Communication) including a plurality of MTC devices that form a group, a RAN (Radio Access Network), an SCS (Services Capability Server) which serves a group message, a first node that connects to the SCS, and a second node that broadcasts the group message to the plurality of MTC devices, comprising:
 sending, by the SCS, the group message including an external group ID and geography area information to the first node;   checking, by the first node, that the SCS is authorized to send the group message;   sending, by the SCS, the group message to the second node;   broadcasting, by the second node, the group message via the RAN to the plurality of MTC devices located in a particular geographical area.   
     
     
         26 . A plurality of network nodes in a system for an MTC (Machine-Type-Communication), comprising:
 an SCS (Services Capability Server) which serves a group message;   a first node that connects to the SCS; and   a second node that broadcasts the group message to a plurality of MTC devices that form a group;   wherein the SCS sends a group message including an external group ID and geography area information to the first node;   the first node checks that the SCS is authorized to send the group message;   the SCS sends the group message to the second node; and   the second node broadcasts the group message via a RAN (Radio Access Network) to the plurality of MTC devices located in a particular geographical area.   
     
     
         27 . A delivery method of a plurality of network nodes in a system for an MTC (Machine-Type-Communication) including an SCS (Services Capability Server) which serves a group message, a first node that connects to the SCS, and a second node that broadcasts the group message to a plurality of MTC devices that form a group, comprising;
 sending, by the SCS, the group message including an external group ID and geography area information to the first node;   checking, by the first node, that the SCS is authorized to send the group message;   sending, by the SCS, the group message to the second node;   broadcasting, by the second node, the group message via a RAN (Radio Access Network) to the plurality of MTC devices located in a particular geographical area.   
     
     
         28 . A plurality of MTC (Machine-Type-Communication) devices in a system for the MTC including an SCS (Services Capability Server) which serves a group message, a first node that connects to the SCS, and a second node that broadcasts the group message to the MTC devices, comprising:
 a controller configured to form a group; and   a receiver for receiving the group messages from the second node;   wherein the SCS sends the group message including an external group ID and geography area information to the first node;   the first node checks that the SCS is authorized to send the group message;   the SCS sends the group message to the second node; and   the second node broadcasts the group message via a RAN (Radio Access Network) to the plurality of MTC devices located in a particular geographical area.   
     
     
         29 . A delivery method of a plurality of MTC (Machine-Type-Communication) devices in a system for the MTC including an SCS (Services Capability Server) which serves a group message, a first node that connects to the SCS, and a second node that broadcasts the group message to the plurality of MTC devices, comprising;
 forming a group; and   receiving the group messages from the second node;   wherein the SCS sends the group message including an external group ID and geography area information to the first node;   the first node checks that the SCS is authorized to send the group message;   the SCS sends the group message to the second node; and   the second node broadcasts the group message via a RAN (Radio Access Network) to the plurality of MTC devices located in a particular geographical area.