# US 11,910,427 B2 · Triggering CSI resource signals and CSI reports in 5G NR > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,427 B2 - Document ID: US11910427B2 - Status: Granted - Kind: B2 - Application number: 17/483,464 - Filed: 2021-09-23 - Published: 2022-03-31 - Granted: 2024-02-20 - Earliest claimed: 2020-09-30 - Assignees: QUALCOMM Incorporated - Applicants: Qualcomm Incorporated - Inventors: Ahmed Elshafie; Yi Huang; Hwan Joon Kwon - Web page: https://patentgrep.com/patent/US11910427B2 ## CPC - H04L 1/1671: {the supervisory signal being transmitted together with control information} - H04W 72/542: using measured or perceived quality - H04L 1/1896: {ARQ related signaling} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 80/02: Data link layer protocols - H04L 1/0027: {Scheduling of signalling, e.g. occurrence thereof} - H04L 1/1614: {using bitmaps} - H04L 1/201: {Frame classification, e.g. bad, good or erased (frame indication per se H04L1/0082)} - 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 Wireless communications systems and methods related to dynamically triggering aperiodic CSI reporting are disclosed. A UE may determine whether a condition is satisfied for triggering upon receipt of a signal from a BS. The condition may be based on a decoding status of the signal. In some examples, the UE may explicitly request a CSI resource signal (e.g., CSI-RS, CSI-IM, or both) from the BS when the condition is met. The explicit request may be included in a modified ACK/NACK field, regardless of whether an ACK or NACK is transmitted. The BS may respond with a CSI resource signal. In other examples, the BS may wait to respond with a CSI resource signal until a threshold number of requests are received from the UE. In other examples, the BS may track a number of NACKs from the UE instead of relying upon an explicit request. ## Claims ### Claim 1 A method of wireless communication, comprising: receiving, by a first wireless communications device, a signal from a second wireless communications device; determining, by the first wireless communications device based on a condition associated with the signal, that a trigger has been satisfied; transmitting, by the first wireless communications device in response to the trigger being satisfied, a request signal with a modified acknowledgement/negative acknowledgement (ACK/NACK) field to the second wireless communications device requesting a channel state information (CSI) resource signal; and monitoring, by the first wireless communications device after a predetermined time in response to the trigger being satisfied, for the CSI resource signal from the second wireless communications device. ### Claim 2 (depends on 1) The method of claim 1, wherein the modified ACK/NACK field comprises a first sub-field for an ACK/NACK signal, and a second sub-field for the request signal. ### Claim 3 (depends on 1) The method of claim 1, further comprising: receiving, by the first wireless communications device, a control signal that: enables the modified ACK/NACK field; configures resources for the CSI resource signal; configures resources for the request signal; and configures the predetermined time, wherein the control signal comprises at least one of a radio resource control (RRC) signal, a medium access control (MAC) control element (CE) signal, or a downlink control information (DCI) signal. ### Claim 4 (depends on 1) The method of claim 1, wherein the condition comprises a decoding status. ### Claim 5 (depends on 1) The method of claim 1, further comprising: tracking, by the first wireless communications device, a number of request signals transmitted by the first wireless communications device within a subset of time; comparing, by the first wireless communications device, the number of request signals to a threshold number of request signals; and monitoring, by the first wireless communications device, for the CSI resource signal in response to the number of request signals exceeding the threshold number of request signals. ### Claim 6 (depends on 1) The method of claim 1, further comprising: transmitting, by the first wireless communications device to the second wireless communications device, a CSI resource report based on the CSI resource signal. ### Claim 7 A method of wireless communication, comprising: transmitting, by a first wireless communications device, a first signal to a second wireless communications device; receiving, by the first wireless communications device from the second wireless communications device, a response message based on the first signal, the response message comprising a request signal requesting a channel state information (CSI) resource signal; accessing, by the first wireless communications device, the request signal from a modified acknowledgement/negative acknowledgement (ACK/NACK) field; determining, by the first wireless communications device, whether a trigger has been satisfied based on the response message comprising the request signal; and transmitting, by the first wireless communications device after a predetermined time in response to the trigger being satisfied, the CSI resource signal to the second wireless communications device. ### Claim 8 (depends on 7) The method of claim 7, wherein the modified ACK/NACK field comprises a first sub-field for an ACK/NACK signal, and a second sub-field for the request signal. ### Claim 9 (depends on 7) The method of claim 7, wherein the response message is received in response to a decoding status condition. ### Claim 10 (depends on 7) The method of claim 7, further comprising: tracking, by the first wireless communications device, a number of request signals received from the second wireless communications device within a subset of time; comparing, by the first wireless communications device, the number of request signals to a threshold number of request signals; and determining, by the first wireless communications device, to transmit the CSI resource signal in response to the number of request signals exceeding the threshold number of request signals. ### Claim 11 (depends on 7) The method of claim 7, further comprising: receiving, by the first wireless communications device from the second wireless communications device, a CSI resource report based on the CSI resource signal. ### Claim 12 A first wireless communications device, comprising: a transceiver configured to receive a first signal from a second wireless communications device; and one or more processors configured to: determine, based on a condition associated with the first signal, that a trigger has been satisfied; transmit, in response to the trigger being satisfied, a request signal with a modified acknowledgement/negative acknowledgement (ACK/NACK) field to the second wireless communications device requesting a channel state information (CSI) resource signal; and monitor, after a predetermined time in response to the trigger being satisfied, for the CSI resource signal from the second wireless communications device. ### Claim 13 (depends on 12) The first wireless communications device of claim 12, wherein the modified ACK/NACK field comprises a first sub-field for an ACK/NACK signal, and a second sub-field for the request signal. ### Claim 14 (depends on 12) The first wireless communications device of claim 12, wherein the transceiver is further configured to receive a control signal that: enables the modified ACK/NACK field enables the modified ACK/NACK field; configures resources for the CSI resource signal; configures resources for the request signal; and configures the predetermined time, wherein the control signal comprises at least one of a radio resource control (RRC) signal, a medium access control (MAC) control element (CE) signal, or a downlink control information (DCI) signal. ### Claim 15 (depends on 12) The first wireless communications device of claim 12, wherein the condition comprises a decoding status. ### Claim 16 (depends on 12) The first wireless communications device of claim 12, wherein the one or more processors are further configured to: track a number of request signals transmitted by the first wireless communications device within a subset of time; compare the number of request signals to a threshold number of request signals; and monitor for the CSI resource signal in response to the number of request signals exceeding the threshold number of request signals. ### Claim 17 (depends on 12) The first wireless communications device of claim 12, wherein the transceiver is further configured to: transmit, to the second wireless communications device, a CSI resource report based on the CSI resource signal. ### Claim 18 A first wireless communications device, comprising: a transceiver configured to: transmit a first signal to a second wireless communications device; and receive, by the first wireless communications device from the second wireless communications device, a response message based on the first signal, the response message comprising a request signal requesting a channel state information (CSI) resource signal; and one or more processors configured to: access the request signal from a modified acknowledgement/negative acknowledgement (ACK/NACK) field; and determine whether a trigger has been satisfied based on the response message comprising the request signal, wherein the transceiver is further configured to transmit, after a predetermined time in response to the trigger being satisfied, the CSI resource signal to the second wireless communications device. ### Claim 19 (depends on 18) The first wireless communications device of claim 18, wherein the modified ACK/NACK field comprises a first sub-field for an ACK/NACK signal, and a second sub-field for the request signal. ### Claim 20 (depends on 18) The first wireless communications device of claim 18, wherein the response message is received in response to a decoding status condition. ### Claim 21 (depends on 18) The first wireless communications device of claim 18, wherein the one or more processors are further configured to: track a number of request signals received from the second wireless communications device within a subset of time; compare the number of request signals to a threshold number of request signals; and determine to transmit the CSI resource signal in response to the number of request signals exceeding the threshold number of request signals. ### Claim 22 (depends on 18) The first wireless communications device of claim 18, wherein the transceiver is further configured to: receive, from the second wireless communications device, a CSI resource report based on the CSI resource signal.