# US 10,375,531 B2 · Method for transmitting/receiving MBMS signal in wireless communication system and device for performing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,531 B2 - Document ID: US10375531B2 - Status: Granted - Kind: B2 - Application number: 15/747,366 - Filed: 2016-08-26 - Published: 2018-07-26 - Granted: 2019-08-06 - Earliest claimed: 2015-08-28 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Inkwon Seo - Web page: https://patentgrep.com/patent/US10375531B2 ## CPC - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)} - H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence) - H04L 27/3488: {Multiresolution systems} - H04W 52/143: {Downlink power control} - H04W 52/32: TPC of broadcast or control channels - H04W 52/346: {distributing total power among users or channels} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04W 52/322: {Power control of broadcast channels} - H04W 52/327: {Power control of multicast channels} - H04W 52/40: during macro-diversity or soft handoff - H04W 72/30: Resource management for broadcast services - 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 According to one embodiment of the present invention, a method by which a terminal receives a multimedia broadcast multicast service (MBMS) signal on the basis of non-orthogonal multiple access (NOMA) operation in a wireless communication system comprises the steps of: receiving an MBMS signal including a basic MBMS layer and an extended MBMS layer multiplexed by different power values on a power domain; and clearing of the basic MBMS layer from the received MBMS signal so as to acquire the extended MBMS layer, wherein the basic MBMS layer is received by a single frequency network (SFN) method from a serving cell and a neighbor cell, and the extended MBMS layer is received from the serving cell and not from the neighbor cell. ## Claims ### Claim 1 A method of receiving a multimedia broadcast multicast service (MBMS) signal by a user equipment based on a non-orthogonal multiple access (NOMA) operation in a wireless communication system, the method comprising: receiving an MBMS signal including a basic MBMS layer and an enhanced MBMS layer which are multiplexed with different power values in a power domain; and obtaining the enhanced MBMS layer by cancelling a power of the basic MBMS layer from the received MBMS signal, wherein the basic MBMS layer is received from a serving cell and a neighbor cell by a single frequency network (SFN) scheme and wherein the enhanced MBMS layer is received from the serving cell, except the neighbor cell. ### Claim 2 (depends on 1) The method of claim 1, wherein the user equipment assumes that a ratio between an energy per resource element (EPRE) of the power of the basic MBMS layer and an EPRE of a multimedia broadcast single frequency network (MBSFN) reference signal is 0 dB. ### Claim 3 (depends on 1) The method of claim 1, wherein the power of the basic MBMS layer canceled from the MBMS signal includes the power of the basic MBMS layer received from the serving cell and the power of the basic MBMS layer received from the neighbor cell. ### Claim 4 (depends on 3) The method of claim 3, wherein the user equipment measures the power of the basic MBMS layer transmitted by the neighbor cell through a nulled resource on which the serving cell does not perform the transmission of the basic MBMS layer. ### Claim 5 (depends on 3) The method of claim 3, wherein the user equipment corrects a power offset between the basic MBMS layer and the enhanced MBMS layer signaled from the serving cell based on the power of the basic MBMS layer received from the neighbor cell. ### Claim 6 (depends on 1) The method of claim 1, wherein a power higher than that of the enhanced MBMS layer is assigned to the basic MBMS layer and wherein the user equipment obtains the basic MBMS layer from the MBMS signal by assuming the power of the enhanced MBMS layer as a noise. ### Claim 7 (depends on 6) The method of claim 6, wherein the user equipment improves a quality of a multimedia content provided through the basic MBMS layer using the enhanced MBMS layer. ### Claim 8 (depends on 1) The method of claim 1, wherein the MBMS signal is received through a physical multicast channel (PMCH) and wherein the serving cell and the neighbor cell belong to a same multimedia broadcast single frequency network (MBSFN) area. ### Claim 9 A user equipment for receiving a multimedia broadcast multicast service (MBMS) signal based on a non-orthogonal multiple access (NOMA) operation in a wireless communication system, the user equipment comprising: a receiver configured to receive the MBMS signal including a basic MBMS layer and an enhanced MBMS layer which are multiplexed with different power values in a power domain; and a processor configured to obtain the enhanced MBMS layer by cancelling a power of the basic MBMS layer from the received MBMS signal, wherein the basic MBMS layer is received from a serving cell and a neighbor cell by a single frequency network (SFN) scheme and wherein the enhanced MBMS layer is received from the serving cell, except the neighbor cell. ### Claim 10 (depends on 9) The user equipment of claim 9, wherein the user equipment assumes that a ratio between an energy per resource element (EPRE) of the power of the basic MBMS layer and an EPRE of a multimedia broadcast single frequency network (MBSFN) reference signal is 0 dB. ### Claim 11 (depends on 9) The user equipment of claim 9, wherein the power of the basic MBMS layer canceled from the MBMS signal includes the power of the basic MBMS layer received from the serving cell and the power of the basic MBMS layer received from the neighbor cell. ### Claim 12 (depends on 11) The user equipment of claim 11, wherein the user equipment measures the power of the basic MBMS layer transmitted by the neighbor cell through a nulled resource on which the serving cell does not perform the transmission of the basic MBMS layer. ### Claim 13 (depends on 11) The user equipment of claim 11, wherein the user equipment corrects a power offset between the basic MBMS layer and the enhanced MBMS layer signaled from the serving cell based on the power of the basic MBMS layer received from the neighbor cell. ### Claim 14 (depends on 9) The user equipment of claim 9, wherein a power higher than that of the enhanced MBMS layer is assigned to the basic MBMS layer and wherein the user equipment obtains the basic MBMS layer from the MBMS signal by assuming the power of the enhanced MBMS layer as a noise. ### Claim 15 (depends on 14) The user equipment of claim 14, wherein the user equipment improves a quality of a multimedia content provided through the basic MBMS layer using the enhanced MBMS layer.