# US 10,484,127 B2 · Method and apparatus for tranceiving common control message in wireless access system supporting narrow band internet of things > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,127 B2 - Document ID: US10484127B2 - Status: Granted - Kind: B2 - Application number: 15/545,458 - Filed: 2016-01-29 - Published: 2018-01-04 - Granted: 2019-11-19 - Earliest claimed: 2015-01-30 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Bonghoe Kim; Yunjung Yi - Web page: https://patentgrep.com/patent/US10484127B2 ## CPC - H04L 1/0026: {Transmission of channel quality indication} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0057: {Physical resource allocation for CQI} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 1/0025: {Transmission of mode-switching indication} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 72/0446: Resources in time domain, e.g. slots or frames - 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 Provided are methods for repeatedly transceiving a common control message for a machine-type communication (MTC) terminal in a wireless access system supporting MTC, and apparatuses supporting the methods. A method for receiving a common control message for an MTC terminal in a wireless access system supporting MTC according to one embodiment of the present invention may comprise the steps of: receiving a channel status information reference signal (CSI-RS); and receiving a common control message from a subframe in which the CSI-RS is received. Here, the common control message can be configured so as to be repeatedly transmitted from a previously configured number of subframes comprising the subframe. ## Claims ### Claim 1 A method for transmitting a common control message in a wireless access system supporting Narrow Band Internet of Things (NB-IoT), the method comprising: allocating a bandwidth for the NB-IoT; and transmitting the common control message in the allocated bandwidth, wherein the bandwidth for the NB-IoT is allocated to be aligned with a boundary of a Physical Resource Block (PRB) used in a legacy system, wherein a PRB which minimizes an offset between a center frequency of the bandwidth for the NB-IoT and a center frequency of the PRB used in the legacy system is allocated as the bandwidth for the NB-IoT, in consideration of a bandwidth of the legacy system, wherein the offset has a non-zero value, and the center frequency of the bandwidth for the NB-IoT is not equal to the center frequency of the PRB used in the legacy system, and wherein the PRB allocated as the bandwidth for the NB-IoT is not used as a Distributed Virtual Resource Block (DVRB) in the legacy system. ### Claim 2 (depends on 1) The method according to claim 1, wherein Virtual Resource Blocks (VRBs) which are mapped to the PRB allocated as the bandwidth for the NB-IoT are used for the transmission of the common control message. ### Claim 3 (depends on 1) The method according to claim 1, wherein the bandwidth for the NB-IoT is allocated other than a VRB affecting center 6 RBs of the legacy system. ### Claim 4 (depends on 1) The method according to claim 1, wherein the common control message is transmitted repeatedly a predetermined number of times. ### Claim 5 An apparatus for transmitting a common control message in a wireless access system supporting Narrow Band Internet of Things (NB-IoT), the method comprising: a transmitter; and a processor for supporting transmission of the common control message, wherein the processor allocates a bandwidth for the NB-IoT, and transmits the common control message in the allocated bandwidth by controlling the transmitter, wherein the bandwidth for the NB-IoT is allocated to be aligned with a boundary of a Physical Resource Block (PRB) used in a legacy system, wherein a PRB which minimizes an offset between a center frequency of the bandwidth for the NB-IoT and a center frequency of the PRB used in the legacy system is allocated as the bandwidth for the NB-IoT, in consideration of a bandwidth of the legacy system, wherein the offset has a non-zero value, and the center frequency of the bandwidth for the NB-IoT is not equal to the center frequency of the PRB used in the legacy system, and wherein the PRB allocated as the bandwidth for the NB-IoT is not used as a Distributed Virtual Resource Block (DVRB) in the legacy system. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein Virtual Resource Blocks (VRBs) which are mapped to the PRB allocated as the bandwidth for the NB-IoT are used for the transmission of the common control message. ### Claim 7 (depends on 5) The apparatus according to claim 5, wherein the bandwidth for the NB-IoT is allocated other than a VRB affecting center 6 RBs of the legacy system. ### Claim 8 (depends on 5) The apparatus according to claim 5, wherein the common control message is transmitted repeatedly a predetermined number of times.