# US 10,873,963 B2 · Method for transmitting DM-RS for broadcast data in next generation communication system and apparatus therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,963 B2 - Document ID: US10873963B2 - Status: Granted - Kind: B2 - Application number: 16/064,909 - Filed: 2018-04-04 - Published: 2020-09-17 - Granted: 2020-12-22 - Earliest claimed: 2017-04-04 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Hyungtae Kim; Jiwon Kang; Hyunsoo Ko; Kijun Kim - Web page: https://patentgrep.com/patent/US10873963B2 ## CPC - H04W 72/1273: of downlink data flows - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/00: Local resource management - H04W 72/04: Wireless resource allocation - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method for receiving a downlink signal by a user equipment (UE) from an eNB in a wireless communication system is disclosed. In detail, the method comprises the steps of receiving a downlink control channel from the eNB; and receiving a downlink data channel and a front loaded reference signal for demodulation of the downlink data channel by using control information included in the downlink control channel, wherein the front loaded reference signal has a repetition factor of 2 on a single symbol of an antenna port of a minimum index when the downlink control channel is masked with a specific identifier. ## Claims ### Claim 1 A method for receiving a downlink signal by a user equipment (UE) from an eNB in a wireless communication system, the method comprising: receiving a downlink control channel from the eNB; and receiving a downlink data channel and a front loaded reference signal for demodulation of the downlink data channel by using control information included in the downlink control channel, wherein the front loaded reference signal has a repetition factor of 2 on a single symbol of an antenna port of a minimum index, wherein the downlink control channel is masked with an identifier indicating that the downlink data channel is a broadcast data channel. ### Claim 2 (depends on 1) The method according to claim 1, wherein whether an additional reference signal added to the front loaded reference signal is received or not is determined based on the number of symbols to which the downlink data channel is allocated. ### Claim 3 (depends on 2) The method according to claim 2, wherein a number of symbols of the additional reference signals added to the front loaded reference signal is fixed depending on a number of symbols to which the downlink data channel is allocated. ### Claim 4 (depends on 2) The method according to claim 2, wherein the downlink control channel does not include information on the additional reference signal and the front loaded reference signal. ### Claim 5 A method for transmitting a downlink signal from an eNB to a user equipment (UE) in a wireless communication system, the method comprising: transmitting a downlink control channel to the UE; and transmitting a downlink data channel corresponding to the downlink control channel and a front loaded reference signal for demodulation of the downlink data channel to the UE, wherein the front loaded reference signal has a repetition factor of 2 on a single symbol of an antenna port of a minimum index, wherein the downlink control channel is masked with an identifier indicating that the downlink data channel is a broadcast data channel. ### Claim 6 (depends on 5) The method according to claim 5, wherein whether an additional reference signal added to the front loaded reference signal is received or not is determined based on the number of symbols to which the downlink data channel is allocated. ### Claim 7 (depends on 6) The method according to claim 6, wherein a number of symbols of the additional reference signals added to the front loaded reference signal is fixed depending on a number of symbols to which the downlink data channel is allocated. ### Claim 8 (depends on 6) The method according to claim 6, wherein the downlink control channel does not include information on the additional reference signal and the front loaded reference signal. ### Claim 9 A user equipment (UE) in a wireless communication system, the UE comprising: a wireless communication module; and a processor connected with the wireless communication module, receiving a downlink control channel from the eNB, and receiving a downlink data channel and a front loaded reference signal for demodulation of the downlink data channel by using control information included in the downlink control channel, wherein the front loaded reference signal has a repetition factor of 2 on a single symbol of an antenna port of a minimum index, wherein the downlink control channel is masked with an identifier indicating that the downlink data channel is a broadcast data channel. ### Claim 10 (depends on 9) The UE according to claim 9, wherein whether an additional reference signal added to the front loaded reference signal is received or not is determined based on the number of symbols to which the downlink data channel is allocated. ### Claim 11 (depends on 10) The UE according to claim 10, wherein a number of symbols of the additional reference signals added to the front loaded reference signal is fixed depending on a number of symbols to which the downlink data channel is allocated. ### Claim 12 (depends on 10) The UE according to claim 10, wherein the downlink control channel does not include information on the additional reference signal and the front loaded reference signal.