# US 2020/0403752 A1 · Determination of Feedback Timing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0403752 A1 - Document ID: US20200403752A1 - Status: Published application - Kind: A1 - Application number: 17/009,839 - Filed: 2020-09-02 - Published: 2020-12-24 - Earliest claimed: 2017-01-16 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Qingyu Miao; Shaohua Li - Web page: https://patentgrep.com/patent/US20200403752A1 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 1/1607: Details of the supervisory signal - H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)} - H04L 1/1896: {ARQ related signaling} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 5/001: {the frequencies being arranged in component carriers} - 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: 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 Embodiments of the present disclosure relate to a method and device for determining feedback timing. In example embodiments, the first communication device obtains information indicating at least one of a capability, a timing requirement, and a service type of a second communication device. Based on the obtained information, the first communication device determines feedback timing to be used by the second communication device. Then, the first communication device sends an indication of the feedback timing to the second communication device for communication with the second communication device in accordance with the feedback timing. ## Claims ### Claim 1 A method performed by a first communication device, the method comprising: selecting a first feedback timing to be used by a second communication device, if a transport block size to be used for transmitting to the second communication device is below a defined threshold or if a transmission mode to be used for transmitting to the second communication device is a specific one among two or more defined transmission modes, and otherwise selecting a second feedback timing to be used by the second communication device, where the second feedback timing is longer than the first feedback timing; and configuring the second communication device to use the selected feedback timing, based on sending an indication of the selected feedback timing to the second communication device. ### Claim 2 (depends on 1) The method of claim 1, wherein selecting one of the first and second feedback timings comprises selecting a first frame structure or a second frame structure, where the first and second frame structures each define a corresponding structure of radio frames used for communications between the first and second communication devices, and where the first frame structure provides for the first feedback timing and the second frame structure provides for the second feedback timing. ### Claim 3 (depends on 2) The method of claim 2, wherein sending the indication of the selected feedback timing comprises indicating the selected frame structure. ### Claim 4 (depends on 2) The method of claim 2, wherein the first communication device is one of a base station of a communication network and a terminal device configured to communicate with the base station, and wherein the second communication device is the other one of the base station and the terminal device. ### Claim 5 (depends on 4) The method of claim 4, wherein the first and second communication devices operate in a communication network and wherein the first and second frame structures correspond to different Time Division Duplex (TDD) configurations of uplink and downlink subframes. ### Claim 6 A first communication device comprising: transceiver circuitry configured to transmit signals to and receive signals from a second communication device; and processing circuitry operatively associated with the transceiver circuitry and configured to: select a first feedback timing to be used by a second communication device, if a transport block size to be used for transmitting to the second communication device is below a defined threshold or if a transmission mode to be used for transmitting to the second communication device is a specific one among two or more defined transmission modes, and otherwise select a second feedback timing to be used by the second communication device, where the second feedback timing is longer than the first feedback timing; and configure the second communication device to use the selected feedback timing, based on sending an indication of the selected feedback timing to the second communication device. ### Claim 7 (depends on 6) The first communication device of claim 6, wherein, to select one of the first and second feedback timings, the processing circuitry is configured to select a first frame structure or a second frame structure, where the first and second frame structures each define a corresponding structure of radio frames used for communications between the first and second communication devices, and where the first frame structure provides for the first feedback timing and the second frame structure provides for the second feedback timing. ### Claim 8 (depends on 7) The first communication device of claim 7, wherein the processing circuitry is configured to indicate the selected frame structure as the indication of the selected feedback timing. ### Claim 9 (depends on 7) The first communication device of claim 7, wherein the first communication device is one of a base station of a communication network and a terminal device configured to communicate with the base station, and wherein the second communication device is the other one of the base station and the terminal device. ### Claim 10 (depends on 9) The first communication device of claim 9, wherein the first and second communication devices are configured for operation in a communication network and wherein the first and second frame structures correspond to different Time Division Duplex (TDD) configurations of uplink and downlink subframes.