# US 2019/0173632 A1 · Signal sending apparatus, signal receiving apparatus, and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173632 A1 - Document ID: US20190173632A1 - Status: Published application - Kind: A1 - Application number: 16/272,847 - Filed: 2019-02-11 - Published: 2019-06-06 - Earliest claimed: 2016-08-12 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co.,Ltd. - Inventors: Kunpeng Liu - Web page: https://patentgrep.com/patent/US20190173632A1 ## CPC - H04L 27/2613: {Structure of the reference signals} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - 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 5/0083: {symbol-by-symbol} - H04L 27/2605: {Symbol extensions, e.g. Zero Tail, Unique Word [UW]} - H04L 27/2656: {Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation} - H04B 7/0408: using two or more beams, i.e. beam diversity - 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 56/00: Synchronisation arrangements - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract This application relates to the communications field, and discloses a signal sending method. The method includes: sending, by a first network device, X first signal(s) and Y second signal(s), where each second signal is associated with at least one first signal, X is an integer greater than or equal to 1, and Y is an integer greater than or equal to 1, where the first signal carries OFDM-symbol index information, the OFDM-symbol index information indicates an index of an OFDM symbol in which the first signal is located in a first time unit, the second signal carries first-time-unit index information, and the first-time-unit index information indicates an index of a first time unit in which the second signal is located in a second time unit, that is, a position of the OFDM symbol in which the first signal is located in the second time unit can be located by using a combination of one second signal and one associated first signal. ## Claims ### Claim 1 A transceiver for communicating via a network, comprising: a memory comprising computer instructions; transceiver circuitry for receiving and sending communication signals, wherein the transceiver operates to detect a first signal and a second signal that are sent by a first network device; a processor, configured to retrieve and execute the computer instructions to generate an information obtaining unit that is configured to process received communication signals to: obtain OFDM-symbol index information, based on the first signal, that indicates an index of an OFDM symbol in which the first signal is located in a first time unit, and obtain first-time-unit index information, based on the second signal, that indicates an index of a first time unit in which the second signal is located in a second time unit, wherein the second time unit comprises at least two first time units, and each first time unit comprises at least two OFDM symbols. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the first signal is among a plurality of first signals and the second signal is among a plurality of second signals, and a first signal and a second signal that are associated with each other are located on a single transmit beam. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the first signal is among a plurality of first signals and the second signal is among a plurality of second signals, and a first signal and a second signal that are associated with each other that are associated with each other are located in a single first time unit. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein the first signal is a synchronization signal, and the second signal is a broadcast signal. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein the first signal is a synchronization signal, and the index of the OFDM symbol in which the first signal is located in the first time unit is indicated by different sequences of the synchronization signal. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein in a first time unit for transmitting a synchronization signal, sequences of third synchronization signals eSSS of synchronization signals transmitted in different OFDM symbols are used to indicate indexes of corresponding OFDM symbols in the first time unit; in different first time units for transmitting a synchronization signal, sequences of third synchronization signals in OFDM symbols corresponding to a same OFDM symbol index are the same; in a first time unit for transmitting a synchronization signal, sequences of primary synchronization signals in synchronization signals transmitted in different OFDM symbols are the same, and sequences of secondary synchronization signals in synchronization signals transmitted in different OFDM symbols are the same; in different first time units for transmitting a synchronization signal, sequences of primary synchronization signals in synchronization signals transmitted in different OFDM symbols are the same; and in different first time units that are used for transmitting a synchronization signal and that are in a same half-frame, sequences of secondary synchronization signals in synchronization signals transmitted in different OFDM symbols are the same. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein when the first signal is a synchronization signal and the second signal is a broadcast signal, signaling of the broadcast signal explicitly indicates first-time-unit index information of the broadcast signal; and a mask of CRC in the broadcast signal carries OFDM-symbol index information corresponding to the broadcast signal or OFDM-symbol index information of a synchronization signal corresponding to the broadcast signal. ### Claim 8 (depends on 1) The apparatus according to claim 1, wherein the first time unit is four OFDM symbols, and the second time unit comprises at least eight OFDM symbols. ### Claim 9 (depends on 8) The apparatus according to claim 8, wherein the first signal is on the first OFDM symbol of the first time unit. ### Claim 10 A method for signal receiving, wherein the method comprises: detecting, by a second network device, a first signal and a second signal that are sent by a first network device; and obtaining, by the second network device, OFDM-symbol index information, based on the first signal, that indicates an index of an OFDM symbol in which the first signal is located in a first time unit, and obtaining first-time-unit index information, based on the second signal, hat indicates an index of a first time unit in which the second signal is located in a second time unit, wherein the second time unit comprises at least two first time units, and each first time unit comprises at least two OFDM symbols. ### Claim 11 (depends on 10) The method according to claim 10, wherein the first signal is among a plurality of first signals and the second signal is among a plurality of second signals, and a first signal and a second signal that are associated with each other are located on a single transmit beam. ### Claim 12 (depends on 10) The method according to claim 10, wherein the first signal is among a plurality of first signals and the second signal is among a plurality of second signals, and a first signal and a second signal that are associated with each other are located in a single first time unit. ### Claim 13 (depends on 10) The method according to claim 10, wherein for a cell or super cell, the first signal is a synchronization signal, and the second signal is a broadcast signal. ### Claim 14 (depends on 13) The method according to claim 13, wherein the first signal is a synchronization signal, and the index of the OFDM symbol in which the first signal is located in the first time unit is indicated by different sequences of the synchronization signal. ### Claim 15 (depends on 14) The method according to claim 14, wherein in a first time unit for transmitting a synchronization signal, sequences of third synchronization signals eSSS of synchronization signals transmitted in different OFDM symbols are used to indicate indexes of corresponding OFDM symbols in the first time unit; in different first time units for transmitting a synchronization signal, sequences of third synchronization signals in OFDM symbols corresponding to a same OFDM symbol index are the same; in a first time unit for transmitting a synchronization signal, sequences of primary synchronization signals in synchronization signals transmitted in different OFDM symbols are the same, and sequences of secondary synchronization signals in synchronization signals transmitted in different OFDM symbols are the same; in different first time units for transmitting a synchronization signal, sequences of primary synchronization signals in synchronization signals transmitted in different OFDM symbols are the same; and in different first time units that are used for transmitting a synchronization signal and that are in a same half-frame, sequences of secondary synchronization signals in synchronization signals transmitted in different OFDM symbols are the same. ### Claim 16 (depends on 14) The method according to claim 14, wherein when the first signal is a synchronization signal and the second signal is a broadcast signal, signaling of the broadcast signal explicitly indicates first-time-unit index information of the broadcast signal; and a mask of CRC in the broadcast signal carries OFDM-symbol index information corresponding to the broadcast signal or OFDM-symbol index information of a synchronization signal corresponding to the broadcast signal. ### Claim 17 (depends on 10) The method according to claim 10, wherein the first time unit is four OFDM symbols, and the second time unit comprises at least eight OFDM symbols. ### Claim 18 (depends on 17) The method according to claim 17, wherein the first signal is on the first OFDM symbol of the first time unit. ### Claim 19 An apparatus, comprising: a memory that includes computer instructions; a processor coupled to the memory, that executes the computer instructions to perform the steps of: detecting a first signal and a second signal that are sent by a first network device; and obtaining OFDM-symbol index information based on the first signal, and obtaining first-time-unit index information based on the second signal, wherein the OFDM-symbol index information indicates an index of an OFDM symbol in which the first signal is located in a first time unit, the first-time-unit index information indicates an index of a first time unit in which the second signal is located in a second time unit, one second time unit comprises at least two first time units, and each first time unit comprises at least two OFDM symbols. ### Claim 20 A computer-readable storage medium having instruction stored thereon that, when executed by a processor, causes an apparatus to perform the steps of: detecting a first signal and a second signal that are sent by a first network device; and obtaining OFDM-symbol index information based on the first signal, and obtaining first-time-unit index information based on the second signal, wherein the OFDM-symbol index information indicates an index of an OFDM symbol in which the first signal is located in a first time unit, the first-time-unit index information indicates an index of a first time unit in which the second signal is located in a second time unit, one second time unit comprises at least two first time units, and each first time unit comprises at least two OFDM symbols.