# US 9,438,438 B2 · Method for transmitting a terminal group zone identifier in machine-to-machine communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,438,438 B2 - Document ID: US9438438B2 - Status: Granted - Kind: B2 - Application number: 14/233,346 - Filed: 2012-03-30 - Published: 2014-06-19 - Granted: 2016-09-06 - Earliest claimed: 2011-08-26 - Assignees: LG Electronics Inc. - Applicants: Eunjong Lee; Youngsoo Yuk; Giwon Park - Inventors: Eunjong Lee; Youngsoo Yuk; Giwon Park - Web page: https://patentgrep.com/patent/US9438438B2 ## CPC - H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)} - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 60/00: Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration - H04L 61/5069: for group communication, multicast communication or broadcast communication - H04W 48/12: using downlink control channel - H04W 92/18: between terminal devices - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Disclosed is a method for determining whether or not a machine-to-machine (M2M) group identifier (MGID) for identifying a multicast service flow shared by a group of M2M communication terminals in an M2M group zone allocated to a terminal is supported in a wireless access system that supports M2M communication. The method comprises the steps of: receiving, from a first base station, an ID of an M2M group zone to which the first base station belongs; receiving, from the first base station, an MGID and an ID of an M2M group zone in which the MGID is supported; receiving, from the first base station or from a second base station, an ID of an M2M group zone to which the second base station belongs; and determining whether or not the received MGID is supported on the basis of the received ID of the M2M group zone to which the second base station belongs. ## Claims ### Claim 1 A method of determining whether an M2M group identifier (MGID) identifying a multicast service flow shared by a group of M2M user equipments in an M2M group zone allocated to a user equipment is supported in a wireless access system supporting a machine-to-machine communication (M2M), comprising the steps of: receiving an ID of an M2M group zone to which a first base station belongs from the first base station; receiving an MGID and an ID of an M2M group zone supportive of the MGID from the first base station; receiving an ID of an M2M group zone to which a second base station belongs from the first base station or the second base station; and determining whether the received MGID is supported based on the received ID of the M2M group zone to which the second base station belongs. ### Claim 2 (depends on 1) The method of claim 1, wherein the step of receiving the ID of the M2M group zone to which the second base station belongs from the first base station or the second base station corresponds to a step of receiving the ID of the M2M group zone to which the second base station belongs via an AAI-SCD (system configuration descriptor) message transmitted from the first base station or the second base station. ### Claim 3 (depends on 1) The method of claim 1, wherein the step of receiving the ID of the M2M group zone to which the second base station belongs from the first base station or the second base station corresponds to a step of receiving the ID of the M2M group zone to which the second base station belongs via a DCD (DL channel descriptor) message transmitted from the first base station or the second base station. ### Claim 4 (depends on 1) The method of claim 1, wherein the step of receiving the ID of the M2M group zone to which the second base station belongs from the first base station or the second base station corresponds to a step of receiving the ID of the M2M group zone to which the second base station belongs via an MGMC (M2M device group MAC control) control message transmitted from the first base station or the second base station. ### Claim 5 (depends on 1) The method of claim 1, wherein the step of receiving the ID of the M2M group zone to which the second base station belongs from the first base station corresponds to a step of receiving the ID of the M2M group zone to which the second base station belongs via an NBR-ADV (neighbor advertisement) message transmitted from the first base station. ### Claim 6 (depends on 1) The method of claim 1, wherein the step of receiving the ID of the M2M group zone to which the second base station belongs from the first base station or the second base station corresponds to a step of receiving the ID of the M2M group zone to which the second base station belongs in a subframe in which a PGID (paging group identifier) information message is transmitted among a paging listening interval of the user equipment. ### Claim 7 (depends on 1) The method of claim 1, wherein the step of receiving the ID of the M2M group zone to which the second base station belongs from the second base station comprises the steps of: performing a process of a network reentry to the second base station; and receiving the ID of the M2M group zone to which the second base station belongs from the second base station after the process of the network reentry is performed. ### Claim 8 (depends on 1) The method of claim 1, wherein the M2M group zone to which the first station or the second station belongs comprises one or more M2M group zones. ### Claim 9 (depends on 8) The method of claim 8, wherein if the M2M group zone to which the first station belongs comprises one or more M2M group zones, the allocated MGID is supported in a prescribed one M2M group zone only among the M2M group zones to which the first base station belongs. ### Claim 10 (depends on 1) The method of claim 1, wherein the M2M group zone to which the first base station or the second base station belongs comprises one or more base stations. ### Claim 11 (depends on 1) The method of claim 1, wherein the step of receiving the MGID and the ID of the M2M group zone to which the first base station belongs from the first base station corresponds to a step of receiving the MGID and the ID of the M2M group zone to which the first base station belongs via a dynamic service addition (DSA) process. ### Claim 12 A user equipment supportive of a machine-to-machine communication (M2M), comprising: a transceiving unit configured to transceive a radio signal with an external; and a controlling unit configured to be connected with a radio communication unit, the controlling unit configured to control the transceiving unit to receive an ID of an M2M group zone to which a first base station belongs from the first base station, the controlling unit configured to control the transceiving unit to receive an MGID (M2M group identifier) and an ID of an M2M group zone supportive of the MGID from the first base station, the controlling unit configured to control the transceiving unit to receive an ID of an M2M group zone to which a second base station belongs from the first base station or the second base station, the controlling unit configured to determine whether the received MGID is supported based on the received ID of the M2M group zone to which the second base station belongs. ### Claim 13 (depends on 12) The user equipment of claim 12, wherein the controlling unit is configured to control the transceiving unit to receive the ID of the M2M group zone to which the second base station belongs via an AAI-SCD (system configuration descriptor) message transmitted from the first base station or the second base station. ### Claim 14 (depends on 12) The user equipment of claim 12, wherein the M2M group zone to which the first station or the second station belongs comprises one or more M2M group zones. ### Claim 15 (depends on 14) The user equipment of claim 14, wherein if the M2M group zone to which the first station belongs comprises one or more M2M group zones, the allocated MGID is supported in a prescribed one M2M group zone only among the M2M group zones to which the first base station belongs. ### Claim 16 (depends on 12) The user equipment of claim 12, wherein the M2M group zone to which the first base station or the second base station belongs comprises one or more base stations.