# US 2014/0195873 A1 · Transmission apparatus and transmission method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0195873 A1 - Document ID: US20140195873A1 - Status: Published application - Kind: A1 - Application number: 14/109,135 - Filed: 2013-12-17 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Yuya ISHIDA; Hideaki SUGIYA - Web page: https://patentgrep.com/patent/US20140195873A1 ## CPC - H03M 13/35: Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics - H03M 13/2906: {using block codes (H03M13/2957 takes precedence)} - H04L 1/0076: {Distributed coding, e.g. network coding, involving channel coding (coding in both space and time H04L1/0618; cooperative diversity H04B7/022)} - H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A transmission apparatus includes a mapping unit configured to map a first information associated with detecting an error of a frame into a payload area of the frame; and a transmission unit configured to transmit the frame including the first information and a second information associated with detecting an error of the frame. ## Claims ### Claim 1 A transmission apparatus comprising: a mapping unit configured to map a first information associated with detecting an error of a frame into a payload area of the frame; and a transmission unit configured to transmit the frame including the first information and a second information associated with detecting an error of the frame. ### Claim 2 (depends on 1) The transmission apparatus according to claim 1, wherein the mapping unit configured to map a first error correction code into a free space in a payload area of a second frame, the payload area including multiplexed first frames, at least one of the first frames including a client signal and a respective first error correction code associated with correcting an error of the client signal; and the transmission unit configured to transmit the second frame including the first error correction code and a second error correction code associated with correcting an error of the second frame. ### Claim 3 (depends on 2) The transmission apparatus according to claim 2, comprising: a generation unit configured to generate the respective first error correction code using bits arranged in the client signal depending on a type of the client signal. ### Claim 4 (depends on 3) The transmission apparatus according to claim 3, wherein in a case where the type of client signal is a predetermined type, the generation unit stops the generation of the respective first error correction code. ### Claim 5 (depends on 2) The transmission apparatus according to claim 2, comprising: a generation unit configured to combine a plurality of client signals and generate corresponding first error correction code using bits arranged in a signal obtained by combining the plurality of client signals. ### Claim 6 (depends on 3) The transmission apparatus according to claim 3, wherein the generation unit generates the respective first error correction code by using bits arranged in a predetermined direction of bits arranged in the client signal. ### Claim 7 (depends on 6) The transmission apparatus according to claim 6, comprising: an addition unit configured to generate the second error correction code using bits arranged in a direction different from the predetermined direction of bits arranged in the second frame, and add the generated second error correction code to the second frame. ### Claim 8 (depends on 2) The transmission apparatus according to claim 2, comprising: a receiving unit configured to receive the second frame including the first error correction code and the second error correction code; a first correction unit configured to decode the second error correction code and correct the error of the second frame using the decoded second error correction code; a separation unit configured to separate the first error correction code and the first frame from the second frame subjected to correction of the error performed by the first correction unit; a second correction unit configured to decode the first error correction code separated by the separation unit and correct an error of the client signal placed in the first frame using the decoded first error correction code; and a transmission unit configured to transmit the client signal subjected to correction of the error performed by the second correction unit. ### Claim 9 A transmission apparatus comprising: a memory; and a processor coupled to the memory and configured to: map a first error correction code into a free space in a payload area of a second frame, the payload area including multiplexed first frames, at least one of the first frames including a client signal and a respective first error correction code associated with correcting an error of the client signal; and transmit the second frame including the first error correction code and a second error correction code associated with correcting an error of the second frame. ### Claim 10 A transmission method of a transmission apparatus, comprising: mapping a first error correction code into a free space in a payload area of a second frame, the second frame including a second error correction code associated with correcting an error of the second frame, the payload area including multiplexed first frames, at least one of the first frames including a client signal; and using a respective first error correction code in correcting an error of the client signal. ### Claim 11 (depends on 10) The transmission method according to claim 10, comprising: transmitting the second frame including the first error correction code and the second error correction code. ### Claim 12 (depends on 10) The transmission method according to claim 10, comprising: generating the respective first error correction code using bits arranged in the client signal depending on a type of the client signal. ### Claim 13 (depends on 12) The transmission method according to claim 12, wherein the generating the first error correction code includes, in a case where the type of client signal is a predetermined type, stopping generating of the respective first error correction code. ### Claim 14 (depends on 10) The transmission method according to claim 10, comprising: combining a plurality of client signals and generating the first error correction code using bits arranged in a signal obtained by combining together the plurality of client signals. ### Claim 15 (depends on 12) The transmission method according to claim 12, wherein the generating the respective first error correction code includes generating the first error correction code using bits arranged in a predetermined direction of bits arranged in the client signal. ### Claim 16 (depends on 10) The transmission method according to claim 10, wherein the free space is calculated by based on a difference between a transmission rate of the first frames from a transmission rate of the second frame. ### Claim 17 (depends on 10) The transmission method according to claim 10, wherein the second error correction code is added to the second frame having the multiplexed first frames with the first error correction code mapped. ### Claim 18 A transmission method, comprising: mapping an error correction code generated to correct an error of a first frame in a free space of a payload of a second frame in which the first frame is multiplexed; and adding an error correction code of the second frame to a frame resulting from the mapping and transmitting the multiplexed frame. ### Claim 19 The transmission method according to 18, wherein a total transmission rate of the multiplexed frame remains below a predefined value subsequent to the mapping and the adding. ### Claim 20 The transmission method according to 18, comprising: calculating the free space based on a difference between a transmission rate of the first frame from a transmission rate of the payload area of the second frame.