# US 10,455,530 B2 · Method for transmitting and receiving synchronization signal in wireless 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 10,455,530 B2 - Document ID: US10455530B2 - Status: Granted - Kind: B2 - Application number: 15/755,220 - Filed: 2016-09-02 - Published: 2018-08-30 - Granted: 2019-10-22 - Earliest claimed: 2015-09-03 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Seokmin Shin; Yunjung Yi - Web page: https://patentgrep.com/patent/US10455530B2 ## CPC - H04W 56/0005: {synchronizing of arrival of multiple uplinks} - H04L 5/0005: {Time-frequency} - 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 27/0014: {Carrier regulation (of chaotic carriers H04L27/001; for multicarrier receivers H04L27/2657)} - H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)} - H04L 27/2613: {Structure of the reference signals} - H04L 27/2692: {with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L 27/2607: {Cyclic extensions} - 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 The present specification provides a method for transmitting and receiving a synchronization signal by a terminal in a wireless communication system, the method comprising the steps of: receiving broadcast information through a predetermined frame from a base station, wherein the predetermined frame is a frame defined for transmitting and receiving a signal in a narrow band (NB) and includes at least one first subframe; and receiving the synchronization signal from the base station through one or more first subframes on the basis of the received broadcasting information. ## Claims ### Claim 1 A method for transmitting and receiving a synchronization signal by a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station (BS), broadcast information through a specific frame, wherein the specific frame is configured for transmitting and receiving a signal in a narrow band (NB), wherein the specific frame includes ten subframe sets, wherein each of the ten subframe sets includes six subframes, and wherein each of the six subframes includes at least one symbol; and receiving, from the BS, the synchronization signal through one or more subframe sets based on the broadcast information. ### Claim 2 (depends on 1) The method of claim 1, wherein the narrow band is a frequency band of 200 KHz. ### Claim 3 (depends on 2) The method of claim 2, wherein the narrow band includes a guard band. ### Claim 4 (depends on 1) The method of claim 1, wherein the synchronization signal includes a first synchronization signal and a second synchronization signal, and the receiving of the synchronization signal includes: receiving the first synchronization signal through a first symbol set of the subframe; and receiving the second synchronization signal through a second symbol set of the subframe. ### Claim 5 (depends on 4) The method of claim 4, wherein the second symbol set is located before the first symbol set. ### Claim 6 (depends on 4) The method of claim 4, wherein the narrow band does not use the same frequency band as that of a legacy LTE system. ### Claim 7 (depends on 4) The method of claim 4, wherein a symbol duration of the first symbol set is six times a symbol duration of the legacy LTE system. ### Claim 8 (depends on 7) The method of claim 7, wherein a subcarrier spacing in the narrow band is ⅙ times a subcarrier spacing of the legacy LTE system. ### Claim 9 (depends on 7) The method of claim 7, wherein the first symbol set and the second symbol set each include one symbol, and the subframe includes two cyclic prefixes (CPs), one second symbol set, and one first symbol set. ### Claim 10 (depends on 9) The method of claim 9, wherein the two CPs are located before the first symbol set and the second symbol set, respectively, and the second symbol set is located immediately before a CP located before the first symbol set. ### Claim 11 (depends on 9) The method of claim 9, wherein the subframe is empty by duration of two symbols and two normal CPs of the legacy LTE system. ### Claim 12 (depends on 1) The method of claim 1, wherein the broadcast information is transmitted through a subframe set of the specific frame. ### Claim 13 (depends on 1) The method of claim 1, wherein the subframe corresponds to a subframe of a legacy LTE system. ### Claim 14 A user equipment (UE) for transmitting and receiving a synchronization signal in a wireless communication system, the UE comprising: a transmitter and a receiver; and a processor, operatively coupled to the transmitter and the receiver, the processor configured to: receive broadcast information through a specific frame from a base station (BS), wherein the specific frame is configured for transmitting and receiving a signal in a narrow band (NB), wherein the specific frame includes ten subframe sets, wherein each of the ten subframe sets includes six subframes, wherein each of the six subframes includes at least one symbol; and receive the synchronization signal from the BS through one or more subframe sets based on the broadcast information.