# US 2019/0173655 A1 · Communication apparatus, communication method, and recording medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173655 A1 - Document ID: US20190173655A1 - Status: Published application - Kind: A1 - Application number: 16/323,322 - Filed: 2017-07-07 - Published: 2019-06-06 - Earliest claimed: 2016-08-10 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Kazuyuki SHIMEZAWA - Web page: https://patentgrep.com/patent/US20190173655A1 ## CPC - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/0092: {Indication of how the channel is divided} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - H04W 56/00: Synchronisation arrangements - H04W 72/04: Wireless resource allocation - H04W 72/0446: Resources in time domain, e.g. slots or frames - 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 [Object] To provide a mechanism that enables flexible design in relation to communication timing. [Solution] A communication apparatus including: a communication control unit that controls communication with another communication apparatus, which is a communication counterpart, through frequency division duplexing (FDD). The communication control unit transmits a second sub frame that is transmitted from the communication apparatus to the other communication apparatus and corresponds to a first sub frame after the first sub frame that is transmitted from the other communication apparatus to the communication apparatus. ## Claims ### Claim 1 A communication apparatus comprising: a communication control unit that controls communication with another communication apparatus, which is a communication counterpart, through frequency division duplexing (FDD), wherein the communication control unit transmits a second sub frame that is transmitted from the communication apparatus to the other communication apparatus and corresponds to a first sub frame after the first sub frame that is transmitted from the other communication apparatus to the communication apparatus. ### Claim 2 (depends on 1) The communication apparatus according to claim 1, wherein the first sub frame and the second sub frame at least partially overlap in a time region, and a last symbol of the first sub frame is arranged before a first symbol of a control channel of the second sub frame, or a last symbol of a control channel of the first sub frame is arranged before a first symbol of the second sub frame. ### Claim 3 (depends on 2) The communication apparatus according to claim 2, wherein the communication control unit controls an interval between a reception start timing of the first sub frame and a transmission start timing of the second sub frame on a basis of a number of symbols of the control channel of the first sub frame or the second sub frame and a switching interval between reception of a channel in the first sub frame and transmission of a channel in the second sub frame. ### Claim 4 (depends on 3) The communication apparatus according to claim 3, wherein the communication control unit communicates with the other communication apparatus using a non-orthogonal access scheme. ### Claim 5 (depends on 1) The communication apparatus according to claim 1, further comprising: a setting unit that sets a control mode of the communication control unit, wherein the communication control unit transmits the second sub frame after the first sub frame in a case in which a first mode is set. ### Claim 6 (depends on 5) The communication apparatus according to claim 5, wherein the communication control unit transmits the second sub frame before the first sub frame in a case in which a second mode is set. ### Claim 7 (depends on 6) The communication apparatus according to claim 6, wherein the first sub frame and the first sub frame at least partially overlap in a time region, and in the second mode, a last symbol of a data channel of the first sub frame is arranged before a first symbol of a control channel of the second sub frame, or a last symbol of a control channel of the first sub frame is arranged before a first symbol of a data channel of the second sub frame. ### Claim 8 (depends on 6) The communication apparatus according to claim 6, wherein the communication control unit does not use, for uplink transmission, a part or all of at least one of two continuous uplink sub frames that have an overlapping portion in a case in which the control mode is switched from the first mode to the second mode. ### Claim 9 (depends on 6) The communication apparatus according to claim 6, wherein the second mode is set as the control mode by default, and the first mode is set in a case in which a predetermined condition is satisfied. ### Claim 10 (depends on 5) The communication apparatus according to claim 5, wherein the control mode is set in accordance with a radio resource control (RRC) state. ### Claim 11 (depends on 5) The communication apparatus according to claim 5, wherein the control mode is set in accordance with a duplex scheme. ### Claim 12 (depends on 5) The communication apparatus according to claim 5, wherein the control mode is set in accordance with a sub carrier interval. ### Claim 13 (depends on 5) The communication apparatus according to claim 5, wherein the control mode is set in accordance with a transmission time interval (TTI) length. ### Claim 14 (depends on 5) The communication apparatus according to claim 5, wherein the communication control unit controls a time required before setting of the control mode becomes valid. ### Claim 15 A communication apparatus comprising: a communication control unit that controls communication with another communication apparatus, which is a communication counterpart, through FDD, wherein the communication control unit processes, in an associated manner, a first sub frame that is transmitted from the communication apparatus to the other communication apparatus and a second sub frame that is transmitted from the other communication apparatus to the communication apparatus after the first sub frame and corresponds to the first sub frame. ### Claim 16 (depends on 15) The communication apparatus according to claim 15, wherein the other communication apparatus sets a first mode in which the second sub frame is transmitted after the first sub frame or a second mode in which the second sub frame is transmitted before the first sub frame, and the communication control unit processes, in an associated manner, the first sub frame and the second sub frame in a case in which the second mode is set. ### Claim 17 A communication method that is executed by a processor of a communication apparatus, the communication method comprising: controlling communication with another communication apparatus, which is a communication counterpart, through FDD, wherein the controlling the communication includes transmitting a second sub frame that is transmitted from the communication apparatus to the other communication apparatus and corresponds to a first sub frame after the first sub frame that is transmitted from the other communication apparatus to the communication apparatus. ### Claim 18 A communication method that is executed by a processor of a communication apparatus, the communication method comprising: controlling communication with another communication apparatus, which is a communication counterpart, through FDD, wherein the controlling the communication includes processing, in an associated manner, a first sub frame that is transmitted from the communication apparatus to the other communication apparatus and a second sub frame that is transmitted from the other communication apparatus to the communication apparatus after the first sub frame and corresponds to the first sub frame. ### Claim 19 A recording medium having a program recorded thereon, the program causing a computer to function as a communication apparatus including a communication control unit that controls communication with another communication apparatus, which is a communication counterpart, through FDD, wherein the communication control unit transmits a second sub frame that is transmitted from the communication apparatus to the other communication apparatus and corresponds to a first sub frame after the first sub frame that is transmitted from the other communication apparatus to the communication apparatus. ### Claim 20 A recording medium having a program recorded thereon, the program causing a computer to function as a communication apparatus including a communication control unit that controls communication with another communication apparatus, which is a communication counterpart, through FDD, wherein the communication control unit processes, in an associated manner, a first sub frame that is transmitted from the communication apparatus to the other communication apparatus and a second sub frame that is transmitted from the other communication apparatus to the communication apparatus after the first sub frame and corresponds to the first sub frame.