# US 11,121,839 B2 · Data transmission method, device, and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,839 B2 - Document ID: US11121839B2 - Status: Granted - Kind: B2 - Application number: 16/786,501 - Filed: 2020-02-10 - Published: 2020-06-04 - Granted: 2021-09-14 - Earliest claimed: 2017-08-10 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jun Li; Zhe Chen; Xiaolei Tie; Zhe Jin - Web page: https://patentgrep.com/patent/US11121839B2 ## CPC - 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)} - H04J 11/0073: {Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group} - H04J 11/0076: {Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group} - H04J 11/0079: {Acquisition of downlink reference signals, e.g. detection of cell-ID} - H04L 5/1469: {using time-sharing} - H04W 48/10: using broadcasted information - H04J 2211/005: Long term evolution [LTE] - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A data transmission method, device, and system are provided. The method includes: sending, by a base station, an NPSS to UE by using a first subframe in a first radio frame and a first subframe in a second radio frame, where the first radio frame and the second radio frame are consecutive, and both the first radio frame and the second radio frame use a TDD uplink-downlink subframe configuration; sending, by the base station, an NPBCH to the UE by using a second subframe in the first radio frame and a second subframe in the second radio frame; sending, by the base station, an NSSS to the UE by using a third subframe in the first radio frame; and sending, by the base station, a SIB1-NB to the UE by using a third subframe in the second radio frame. ## Claims ### Claim 1 A data transmission method, comprising: sending, by a base station, a narrowband primary synchronization signal (NPSS) to user equipment (UE) using a first subframe in a first radio frame and a first subframe in a second radio frame, wherein the first radio frame and the second radio frame are consecutive, and both the first radio frame and the second radio frame use a time division duplex (TDD) uplink-downlink subframe configuration; sending, by the base station, a narrowband physical broadcast channel (NPBCH) to the UE using a second subframe in the first radio frame and a second subframe in the second radio frame; sending, by the base station, a narrowband secondary synchronization signal (NSSS) to the UE using a third subframe in the first radio frame; and sending, by the base station, a system information block Type1-NB (SIB1-NB) to the UE by using a third subframe in the second radio frame. ### Claim 2 (depends on 1) The method according to claim 1, wherein in the first radio frame and the second radio frame, the first subframe, the second subframe, and the third subframe each are a downlink subframe. ### Claim 3 (depends on 1) The method according to claim 1, wherein in the first radio frame and the second radio frame, the first subframe and the third subframe each are a downlink subframe, the second subframe in the first radio frame comprises two special subframes in the first radio frame, and the second subframe in the second radio frame comprises two special subframes in the second radio frame. ### Claim 4 (depends on 2) The method according to claim 2, wherein the first subframe is a subframe 5, the second subframe is a subframe 9, and the third subframe is a subframe 0. ### Claim 5 (depends on 1) The method according to claim 1, wherein in response to that the first subframe and the third subframe in the first radio frame are not a combination of a subframe 5 and a subframe 9, the first subframe and the third subframe in the first radio frame are separated by a subframes, wherein a is a natural number, a is not equal to 3 and is less than 9, and that the first subframe and the third subframe in the first radio frame are separated by the a subframes indicates that both the first radio frame and the second radio frame use the TDD uplink-downlink subframe configuration. ### Claim 6 (depends on 1) The method according to claim 1, wherein the NPSS comprises first indication information, and the first indication information indicates that both the first radio frame and the second radio frame use the TDD uplink-downlink subframe configuration. ### Claim 7 (depends on 1) The method according to claim 1, wherein the second subframe in the first radio frame comprises a special subframe and a downlink subframe in the first radio frame, and the second subframe in the second radio frame comprises a special subframe and a downlink subframe in the second radio frame. ### Claim 8 (depends on 1) The method according to claim 1, wherein a signal format of the NPSS is a first signal format, and the first signal format indicates that both the first radio frame and the second radio frame use the TDD uplink-downlink subframe configuration. ### Claim 9 A data transmission method, comprising: receiving, by user equipment UE in a first subframe in a first radio frame and a first subframe in a second radio frame, a narrowband primary synchronization signal (NPSS) from a base station, wherein the first radio frame and the second radio frame are consecutive; receiving, by the UE in a second subframe in the first radio frame and a second subframe in the second radio frame, a narrowband physical broadcast channel (NPBCH) from the base station; receiving, by the UE in a third subframe in the first radio frame, a narrowband secondary synchronization signal (NSSS) from the base station; receiving, by the UE in a third subframe in the second radio frame, a system information block Type1-NB (SIB1-NB) from the base station; and in response to that the first subframe and the third subframe in the first radio frame are separated by a subframes, determining, by the UE, that both the first radio frame and the second radio frame use a time division duplex (TDD) uplink-downlink subframe configuration, wherein a is a natural number, a is not equal to 3 and is less than 9. ### Claim 10 (depends on 9) The method according to claim 9, wherein the first subframe is a subframe 5, the second subframe is a subframe 9, and the third subframe is a subframe 0. ### Claim 11 An apparatus, comprising: at least one processor coupled to a non-transitory memory and configured to execute instructions stored in the non-transitory memory, wherein the instructions cause the apparatus to: receive, in a first subframe in a first radio frame and a first subframe in a second radio frame, a narrowband primary synchronization signal (NPSS) from a base station, wherein the first radio frame and the second radio frame are consecutive; receive, in a second subframe in the first radio frame and a second subframe in the second radio frame, a narrowband physical broadcast channel (NPBCH) from the base station; receive, in a third subframe in the first radio frame, a narrowband secondary synchronization signal (NSSS) from the base station; receive, in a third subframe in the second radio frame, a system information block Type1-NB (SIB1-NB) from the base station; and in response to that the first subframe and the third subframe in the first radio frame are separated by a subframes, determine that both the first radio frame and the second radio frame use a time division duplex (TDD) uplink-downlink subframe configuration, wherein a is a natural number, a is not equal to 3 and is less than 9. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein the first subframe is a subframe 5, the second subframe is a subframe 9, and the third subframe is a subframe 0. ### Claim 13 (depends on 11) The apparatus according to claim 11, wherein the apparatus is user equipment. ### Claim 14 An apparatus, comprising: at least one processor coupled to a non-transitory memory and configured to execute instructions stored in the non-transitory memory, wherein the instructions cause the apparatus to: send a narrowband primary synchronization signal (NPSS) to user equipment (UE) using a first subframe in a first radio frame and a first subframe in a second radio frame, wherein the first radio frame and the second radio frame are consecutive, and both the first radio frame and the second radio frame use a time division duplex (TDD) uplink-downlink subframe configuration; send a narrowband physical broadcast channel (NPBCH) to the UE using a second subframe in the first radio frame and a second subframe in the second radio frame; send a narrowband secondary synchronization signal (NSSS) to the UE using a third subframe in the first radio frame; and send a system information block Type1-NB (SIB1-NB) to the UE by using a third subframe in the second radio frame. ### Claim 15 (depends on 14) The apparatus according to claim 14, wherein the first subframe is a subframe 5, the second subframe is a subframe 9, and the third subframe is a subframe 0. ### Claim 16 (depends on 14) The apparatus according to claim 14, wherein the apparatus is a base station.