# US 2019/0245644 A1 · Data transmission method, apparatus, and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0245644 A1 - Document ID: US20190245644A1 - Status: Published application - Kind: A1 - Application number: 16/268,107 - Filed: 2019-02-05 - Published: 2019-08-08 - Earliest claimed: 2014-12-30 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jinrong Yin; Weiyang Wang - Web page: https://patentgrep.com/patent/US20190245644A1 ## CPC - H04B 10/2581: Multimode transmission - G02B 6/38: having fibre to fibre mating means - H04J 14/04: Mode multiplex systems - H04L 1/0042: {Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape (H04L1/0067 takes precedence)} - H04L 25/03343: {Arrangements at the transmitter end} - H04L 27/02: Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation (H04L27/32 takes precedence) - H04L 27/367: {using predistortion} - H04B: TRANSMISSION - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present disclosure provides a data transmission method including: receiving a first-mode optical signal from a first port corresponding to a first port number; converting, according to a correspondence between the first port number and a first mode group number, the received first-mode optical signal into a second-mode optical signal carried in a first mode group identified by the first mode group number, where the second-mode optical signal carried in the first mode group identified by the first mode group number includes an optical signal in one or more modes; and outputting the second-mode optical signal obtained by means of conversion. ## Claims ### Claim at position 1 1-16. (canceled) ### Claim 17 A data transmission method, comprising: receiving a first optical signal from an input port; converting, according to a correspondence between an input port of an optical signal and a mode group, the received first optical signal into a second optical signal in one or more modes in a mode group corresponding to the input port; and multiplexing the second optical signal to a multimode optical fiber for transmission. ### Claim 18 (depends on 17) The data transmission method according to claim 17, wherein the first optical signal is an optical signal in one or more modes. ### Claim 19 (depends on 17) The data transmission method according to claim 17, wherein the mode group comprises optical signals in one or more modes having a same propagation constant or approximate propagation constants. ### Claim 20 A data transmission method, comprising: receiving a second optical signal; determining a mode group to which the second optical signal belongs; and outputting, according to a correspondence between an output port and a mode group, the received second optical signal from a corresponding output port. ### Claim 21 (depends on 20) The data transmission method according to claim 20, further comprising: converting the second optical signal into a preset-mode optical signal for output. ### Claim 22 (depends on 20) The data transmission method according to claim 20, wherein the second optical signal is an optical signal in one or more modes. ### Claim 23 (depends on 20) The data transmission method according to claim 20, wherein the mode group comprises optical signals in one or more modes having a same propagation constant or approximate propagation constants. ### Claim 24 A mode multiplexer, comprising: a first port processing unit, configured to: receive a first optical signal from an input port; a first processor, configured to: convert, according to a correspondence between an input port of an optical signal and a mode group, the received first optical signal into a second optical signal in one or more modes in a mode group corresponding to the input port, and instruct the first port processing unit to multiplex the second optical signal to a multimode optical fiber for transmission; and wherein the first port processing unit is further configured to: multiplex, according to an instruction from the first processor, the second optical signal to a multimode optical fiber for transmission. ### Claim 25 (depends on 24) The mode multiplexer according to claim 24, wherein the first optical signal is an optical signal in one or more modes. ### Claim 26 (depends on 24) The mode multiplexer according to claim 24, wherein the mode group comprises optical signals in one or more modes having a same propagation constant or approximate propagation constants. ### Claim 27 A mode demultiplexer, comprising: a second port processing unit, configured to: receive a second optical signal; a second processor, configured to: determine a mode group to which the received second optical signal belongs, obtain, according to a correspondence between an output port and a mode group, the output port corresponding to the received second optical signal, and instruct the second port processing unit to output the received second optical signal from the corresponding output port; and wherein the second port processing unit is further configured to: output, according to an instruction from the second processor, the received second optical signal from a corresponding output port. ### Claim 28 (depends on 27) The mode demultiplexer according to claim 27, wherein: the second processor is further configured to: convert the second optical signal into a preset-mode optical signal, and instruct the second port processing unit to output the signal obtained by means of conversion from a corresponding output port; and the second port processing unit is further configured to: output the optical signal obtained by means of conversion from the corresponding port according to an instruction from the second processor. ### Claim 29 (depends on 27) The mode demultiplexer according to claim 27, wherein the second optical signal is an optical signal in one or more modes. ### Claim 30 (depends on 27) The mode demultiplexer according to claim 27, wherein the mode group comprises optical signals in one or more modes having a same propagation constant or approximate propagation constants.