# US 10,873,940 B2 · Data transmission method, terminal, and base station in LAA-LTE system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,940 B2 - Document ID: US10873940B2 - Status: Granted - Kind: B2 - Application number: 16/507,188 - Filed: 2019-07-10 - Published: 2019-10-31 - Granted: 2020-12-22 - Earliest claimed: 2015-11-06 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Juan Zheng; Zuomin Wu; Lei Guan; Qiang Li - Web page: https://patentgrep.com/patent/US10873940B2 ## CPC - H04L 27/2602: {Signal structure} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 27/2607: {Cyclic extensions} - H04L 27/2613: {Structure of the reference signals} - H04W 56/0005: {synchronizing of arrival of multiple uplinks} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/20: Control channels or signalling for resource management - H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)} - 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 The present disclosure relates to example data transmission methods, user equipment, and access network devices in an LAA-LTE system. An example data receiving method includes determining, by user equipment, first information of a first cell. The user equipment determines a first subframe based on the first information, where a downlink data transmission length of the first subframe is less than a first threshold. The user equipment then determines a data transmission characteristic of the cell in the first subframe based on a preset condition, so as to receive, based on the data transmission characteristic, data including the first subframe. In doing so, a data transmission characteristic of a base station or a terminal is standardized, and a reference signal such as a DRS can be correctly identified. ## Claims ### Claim 1 A control information receiving method, comprising: receiving, by a user equipment, a control information of a first cell, the control information indicating a first subframe in the first cell, a downlink data transmission length of the first subframe being less than a first threshold; and determining, by the user equipment, a last OFDM symbol of a first slot included in the first subframe does not include a primary synchronization signal and a second to last OFDM symbol of a first slot included in the first subframe does not include a secondary synchronization signal, when the first subframe is a first subframe in a radio frame or a sixth subframe in a radio frame, when a downlink data transmission configuration of the first cell is a normal cyclic prefix, and when the downlink data transmission length of the first subframe is less than 12 orthogonal frequency-division multiplexing (OFDM) symbols. ### Claim 2 (depends on 1) The method according to claim 1, the method further comprising: detecting, by the user equipment, the control information on at least one of a control data channel or a service data channel of the first cell. ### Claim 3 (depends on 1) The user equipment according to claim 1, the control information further indicating the downlink data transmission length of the first subframe is less than the first threshold. ### Claim 4 (depends on 1) The method according to claim 1, wherein the first threshold is a value greater than or equal to 1 millisecond (ms). ### Claim 5 (depends on 1) The method according to claim 1, wherein a data transmission start position of the first subframe is on a subframe boundary, and the first subframe is a last subframe in one burst data transmission. ### Claim 6 A control information sending method, comprising: sending, by an access network device, a control information of a first cell, the control information indicating a first subframe in the first cell, a downlink data transmission length of the first subframe being less than a first threshold; and determining, by the access network device, a last OFDM symbol of a first slot included in the first subframe does not include a primary synchronization signal and a second to last OFDM symbol of a first slot included in the first subframe does not include a secondary synchronization signal, when the first subframe is a first subframe in a radio frame or a sixth subframe in a radio frame, when a downlink data transmission configuration of the first cell is a normal cyclic prefix, and when the downlink data transmission length of the first subframe is less than 12 orthogonal frequency-division multiplexing (OFDM) symbols. ### Claim 7 (depends on 6) The method according to claim 6, the method further comprising: sending, by the access network device, the control information on at least one of a control data channel or a service data channel of the first cell. ### Claim 8 (depends on 6) The method according to claim 6, the control information further indicating the downlink data transmission length of the first subframe is less than the first threshold. ### Claim 9 (depends on 6) The method according to claim 6, wherein the first threshold is a value not less than 1 millisecond (ms). ### Claim 10 (depends on 6) The method according to claim 6, wherein a data transmission start position of the first subframe is on a subframe boundary, and the first subframe is a last subframe in one burst data transmission. ### Claim 11 A user equipment comprising: a receiver, configured to receive a control information of a first cell, the control information indicating a first subframe in the first cell, a downlink data transmission length of the first subframe being less than a first threshold; and a processor coupled to the receiver and configured to determine a last OFDM symbol of a first slot included in the first subframe does not include a primary synchronization signal and a second to last OFDM symbol of a first slot included in the first subframe does not include a secondary synchronization signal, when the first subframe is a first subframe in a radio frame or a sixth subframe in a radio frame, when a downlink data transmission configuration of the first cell is a normal cyclic prefix, and when the downlink data transmission length of the first subframe is less than 12 orthogonal frequency-division multiplexing (OFDM) symbols. ### Claim 12 (depends on 11) The user equipment according to claim 11, the receiver further configured to receive the control information on at least one of a control data channel or a service data channel of the first cell. ### Claim 13 (depends on 11) The user equipment according to claim 11, the control information further indicating the downlink data transmission length of the first subframe is less than the first threshold. ### Claim 14 (depends on 11) The user equipment according to claim 11, wherein the first threshold is a value greater than or equal to 1 millisecond (ms). ### Claim 15 (depends on 11) The user equipment according to claim 11, wherein a data transmission start position of the first subframe is on a subframe boundary, and the first subframe is a last subframe in a transmission burst. ### Claim 16 An access network device, the access network device comprising: a transmitter configured to send a control information of a first cell, the control information indicating a first subframe in the first cell, a downlink data transmission length of the first subframe being less than a first threshold; a processor coupled to the transmitter and configured to determine a last OFDM symbol of a first slot included in the first subframe does not include a primary synchronization signal and a second to last OFDM symbol of a first slot included in the first subframe does not include a secondary synchronization signal, when the first subframe is a first subframe in a radio frame or a sixth subframe in a radio frame, when a downlink data transmission configuration of the first cell is a normal cyclic prefix, and when the downlink data transmission length of the first subframe is less than 12 orthogonal frequency-division multiplexing (OFDM) symbols. ### Claim 17 (depends on 16) The access network device according to claim 16, wherein the transmitter is further configured to send the control information on at least one of a control data channel or a service data channel of the first cell. ### Claim 18 (depends on 16) The access network device according to claim 16, wherein the transmitter is further configured to send control information, the control information indicating that the downlink data transmission length of the first subframe is less than the first threshold. ### Claim 19 (depends on 16) The access network device according to claim 16, wherein the first threshold is a value greater than or equal to 1 millisecond (ms). ### Claim 20 (depends on 16) The access network device according to claim 16, wherein a data transmission start position of the first subframe is on a subframe boundary, and the first subframe is a last subframe in a transmission burst. ### Claim 21 A non-transitory computer-readable media storing computer instructions that when executed by one or more processors, cause the one or more processors to perform the steps of: receiving, by a user equipment, a control information of a first cell, the control information indicating a first subframe in the first cell, a downlink data transmission length of the first subframe being less than a first threshold; and determining, by the user equipment, a last OFDM symbol of a first slot included in the first subframe does not include a primary synchronization signal and a second to last OFDM symbol of a first slot included in the first subframe does not include a secondary synchronization signal, when the first subframe is a first subframe in a radio frame or a sixth subframe in a radio frame, when a downlink data transmission configuration of the first cell is a normal cyclic prefix, and when the downlink data transmission length of the first subframe is less than 12 orthogonal frequency-division multiplexing (OFDM) symbols. ### Claim 22 (depends on 11) The non-transitory computer-readable media according to claim 11, wherein the steps further comprising: detecting, by the user equipment, the control information on at least one of a control data channel or a service data channel of the first cell. ### Claim 23 (depends on 21) The non-transitory computer-readable media according to claim 21, the control information further indicating the downlink data transmission length of the first subframe is less than the first threshold. ### Claim 24 (depends on 21) The non-transitory computer-readable media according to claim 21, wherein the first threshold is a value greater than or equal to 1 millisecond (ms). ### Claim 25 (depends on 21) The non-transitory computer-readable media according to claim 21, wherein a data transmission start position of the first subframe is on a subframe boundary, and the first subframe is a last subframe in one burst data transmission. ### Claim 26 A non-transitory computer-readable media storing computer instructions that when executed by one or more processors, cause the one or more processors to perform the steps of: sending, by an access network device, a control information of a first cell, the control information indicating a first subframe in the first cell, a downlink data transmission length of the first subframe being less than a first threshold; and determining, by the access network device, a last OFDM symbol of a first slot included in the first subframe does not include a primary synchronization signal and a second to last OFDM symbol of a first slot included in the first subframe does not include a secondary synchronization signal, when the first subframe is a first subframe in a radio frame or a sixth subframe in a radio frame, when a downlink data transmission configuration of the first cell is a normal cyclic prefix, and when the downlink data transmission length of the first subframe is less than 12 orthogonal frequency-division multiplexing (OFDM) symbols. ### Claim 27 (depends on 26) The non-transitory computer-readable media according to claim 26, the steps further comprising: sending, by the access network device, the control information on at least one of a control data channel or a service data channel of the first cell. ### Claim 28 (depends on 26) The non-transitory computer-readable media according to claim 26, the control information further indicating the downlink data transmission length of the first subframe is less than the first threshold. ### Claim 29 (depends on 26) The non-transitory computer-readable media according to claim 26, wherein the first threshold is a value not less than 1 millisecond (ms). ### Claim 30 (depends on 26) The non-transitory computer-readable media according to claim 26, wherein a data transmission start position of the first subframe is on a subframe boundary, and the first subframe is a last subframe in one burst data transmission.