# US 2022/0286255 A1 · Apparatus and method of csi acquisition on sidelink > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0286255 A1 - Document ID: US20220286255A1 - Status: Published application - Kind: A1 - Application number: 17/637,272 - Filed: 2019-08-23 - Published: 2022-09-08 - Earliest claimed: 2019-08-23 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Limited - Inventors: Xin Guo; Xiaodong Yu; Zhennian Sun; Haipeng Lei; Haiming Wang - Web page: https://patentgrep.com/patent/US20220286255A1 ## CPC - 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 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0057: {Physical resource allocation for CQI} - H04L 5/006: {Quality of the received signal, e.g. BER, SNR, water filling} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 92/18: between terminal devices - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Apparatus and methods of Channel Status Information (CSI) acquisition on sidelink are disclosed. The apparatus includes: a transmitter that transmits a reference signal to a device on a sidelink (SL) transmission; a receiver that receives a channel quality report from the device; and a processor that controls the transmitter and the receiver, and decodes the channel quality report to obtain a channel quality; wherein the processor is configurable to support one or a combination selected from a group consisting of: a reporting activation scheme where an SL Channel Status Information (CSI) reporting activation indicator is configured; and a measurement triggering scheme where the transmitter initiates transmission of the reference signal upon satisfying a triggering condition. ## Claims ### Claim 1 An apparatus comprising: a transmitter that transmits a reference signal to a device on a sidelink (SL) transmission; a receiver that receives a channel quality report from the device; and a processor that controls the transmitter and the receiver, and decodes the channel quality report to obtain a channel quality; wherein the processor is configurable to support: a reporting activation scheme in which a SL channel status information (CSI) reporting activation indicator is configured; a measurement triggering scheme in which the transmitter initiates transmission of the reference signal upon satisfying a triggering condition; or a combination thereof. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein, in response to the reporting activation scheme being supported, the channel quality report is expected by the receiver upon satisfying an activation condition, and is not expected by the receiver upon satisfying a deactivation condition. ### Claim 3 (depends on 2) The apparatus according to claim 2, wherein the SL CSI reporting activation indicator is pre-configured, or the transmitter further transmits a channel quality measurement configuration, and the SL CSI reporting activation indicator is configurable via the channel quality measurement configuration. ### Claim 4 (depends on 2) The apparatus according to claim 2, wherein the SL CSI reporting activation indicator is a maximum time gap between a channel quality measurement trigger and a CSI reporting instance. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein the SL CSI reporting activation indicator is defined in terms of a number of SL slots or symbols. ### Claim 6 (canceled) ### Claim 7 (canceled) ### Claim 8 (depends on 4) The apparatus according to claim 4, wherein the transmitter further transmits a SL CSI measurement trigger, and upon transmitting the SL CSI measurement trigger, the processor starts a timer corresponding to the maximum time gap. ### Claim 9 (depends on 2) The apparatus according to claim 2, wherein the channel quality report comprises a report quantity comprising: a channel quality indicator (CQI), a rank indicator (RI), a precoder matrix indicator (PMI), a reference signal received power (RSRP), or some combination thereof. ### Claim 10 (depends on 1) The apparatus according to claim 1, wherein time and frequency resources for transmitting the reference signal are allocated by: a base station, the apparatus, a further device, or some combination thereof. ### Claim 11 (depends on 1) The apparatus according to claim 1, wherein, in response to the transmitter having no data to transmit, the reference signal is transmitted in a physical sidelink shared channel (PSSCH) with dummy data. ### Claim 12 (canceled) ### Claim 13 (canceled) ### Claim 14 (canceled) ### Claim 15 An apparatus comprising: a receiver that receives a reference signal from a device on a sidelink (SL) transmission; a transmitter that transmits a channel quality report to the device; and a processor that controls the transmitter and the receiver, and measures a channel quality based on the reference signal received; wherein the processor is configurable to support: a reporting activation scheme where an in which a SL channel status information (CSI) reporting activation indicator is configured; a measurement triggering scheme in which the processor measures the channel quality upon satisfying a triggering condition; or a combination thereof. ### Claim 16 (depends on 15) The apparatus according to claim 15, wherein, where in response to the reporting activation scheme being supported, the transmitter transmits the channel quality report upon satisfying an activation condition, and does not transmit the channel quality report upon satisfying a deactivation condition. ### Claim 17 (depends on 16) The apparatus according to claim 16, wherein: the SL CSI reporting activation indicator is pre-configured or, if the receiver further receives a channel quality measurement configuration, configurable via the channel quality measurement configuration; the SL CSI reporting activation indicator is a maximum time gap between a channel quality measurement trigger and a CSI reporting instance; or a combination thereof. ### Claim 18 (canceled) ### Claim 19 (depends on 17) The apparatus according to claim 17, wherein the SL CSI reporting activation indicator is defined in terms of a number of SL slots or symbols. ### Claim 20 (canceled) ### Claim 21 (canceled) ### Claim 22 (canceled) ### Claim 23 (depends on 18) The apparatus according to claim 18, wherein the receiver further receives a SL CSI measurement trigger, and upon receiving the SL CSI measurement trigger, the processor starts a timer corresponding to the maximum time gap. ### Claim 24 (depends on 16) The apparatus according to claim 16, wherein the channel quality report comprises a report quantity comprising: a channel quality indicator (CQI), a rank indicator (RI), a precoder matrix indicator (PMI), a reference signal received power (RSRP), or some combination thereof. ### Claim 25 (depends on 15) The apparatus according to claim 15, wherein time and frequency resources for transmitting the channel quality report are allocated by: a base station, the apparatus, a further device, or some combination thereof. ### Claim 26 (canceled) ### Claim 27 (canceled) ### Claim 28 (canceled) ### Claim 29 (canceled) ### Claim 30 (depends on 15) The apparatus according to claim 15, wherein, if the measurement triggering scheme is supported, the triggering condition is satisfied on detection of the reference signal within a physical sidelink shared channel (PSSCH) transmission, or the triggering condition is satisfied on detection of a flag in SCI. ### Claim 31 A method comprising: transmitting, by a transmitter, a reference signal to a device on a sidelink (SL) transmission; receiving, by a receiver, a channel quality report from the device; and decoding, by a processor, the channel quality report to obtain a channel quality; wherein the processor controls the transmitter and the receiver, and is configurable to support: a reporting activation scheme in which a SL channel status information (CSI) reporting activation indicator is configured; a measurement triggering scheme in which the transmitter initiates transmission of the reference signal upon satisfying a triggering condition; or a combination thereof. ### Claim 32 (depends on 31) The method according to claim 31, wherein, in response to the reporting activation scheme being supported, the channel quality report is expected by the receiver upon satisfying an activation condition, and is not expected by the receiver upon satisfying a deactivation condition. ### Claim 33 (canceled) ### Claim 34 (depends on 32) The method according to claim 32, wherein the SL CSI reporting activation indicator is a maximum time gap between a channel quality measurement trigger and a CSI reporting instance. ### Claim 35 (canceled) ### Claim 36 (canceled) ### Claim 37 (canceled) ### Claim 38 (canceled) ### Claim 39 (canceled) ### Claim 40 (canceled) ### Claim 41 (canceled) ### Claim 42 (canceled) ### Claim 43 (canceled) ### Claim 44 (canceled) ### Claim 45 (canceled) ### Claim 46 (canceled) ### Claim 47 (canceled) ### Claim 48 (canceled) ### Claim 49 (canceled) ### Claim 50 (canceled) ### Claim 51 (canceled) ### Claim 52 (canceled) ### Claim 53 (canceled) ### Claim 54 (canceled) ### Claim 55 (canceled) ### Claim 56 (canceled) ### Claim 57 (canceled) ### Claim 58 (canceled) ### Claim 59 (canceled) ### Claim 60 (canceled)