# US 11,910,428 B2 · Intra-frequency measurement of layer 3 based channel state information reference signals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,428 B2 - Document ID: US11910428B2 - Status: Granted - Kind: B2 - Application number: 17/503,104 - Filed: 2021-10-15 - Published: 2023-04-20 - Granted: 2024-02-20 - Earliest claimed: 2021-10-15 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Qunfeng He; Huilin Xu; Carlos Cabrera Mercader - Web page: https://patentgrep.com/patent/US11910428B2 ## CPC - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/542: using measured or perceived quality - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/1273: of downlink data flows - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04W 8/22: Processing or transfer of terminal data, e.g. status or physical capabilities - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Techniques and apparatus for intra-frequency measurement of Layer 3 (L3)-based channel state information reference signals (CSI-RSs) are described. An example method that may be performed by a user equipment (UE) includes transmitting an indication based on a UE capability to simultaneously receive downlink data from a serving cell on one or more first resources and measure one or more CSI-RSs from a target cell on one or more second resources. The one or more first resources at least partially overlap the one or more second resources in a time domain and a frequency domain. The method also includes performing a CSI-RS measurement procedure, based on the UE capability. ## Claims ### Claim 1 A method of wireless communication by a user equipment (UE), comprising: transmitting an indication based on a UE capability to simultaneously receive downlink data from a serving cell on one or more first resources and measure one or more channel state information (CSI) reference signals (CSI-RSs) from a target cell on one or more second resources, wherein the one or more first resources at least partially overlap the one or more second resources in a time domain and a frequency domain; and performing a CSI-RS measurement procedure, based on the UE capability, wherein: the UE lacks the UE capability when the UE comprises a single processing engine configured to process the downlink data and measure the one or more CSI-RSs, the single processing engine being configured to use a first Fast Fourier Transform (FFT) window based on a first timing of the serving cell; and when the UE lacks the UE capability, performing the CSI-RS measurement procedure comprises: reconfiguring the single processing engine to use a second FFT window based on a second timing of the target cell during a set of the one or more first resources; and using the reconfigured single processing engine to measure the one or more CSI-RSs on the one or more second resources during the set of the one or more first resources. ### Claim 2 (depends on 1) The method of claim 1, wherein performing the CSI-RS measurement procedure comprises simultaneously receiving the downlink data on the one or more first resources and measuring the one or more CSI-RSs on the one or more second resources, when the UE has the UE capability. ### Claim 3 (depends on 2) The method of claim 2, wherein simultaneously receiving the downlink data and measuring the one or more CSI-RSs comprises receiving the downlink data and measuring the one or more CSI-RSs during a same orthogonal frequency division multiplexing (OFDM) symbol. ### Claim 4 (depends on 2) The method of claim 2, wherein the UE has the UE capability when the UE comprises a first processing engine configured to process the downlink data received on the one or more first resources and a second processing engine configured to process measurements of CSI-RSs on the one or more second resources. ### Claim 5 (depends on 4) The method of claim 4, wherein: the first processing engine is configured to perform a first receive (Rx) FFT operation; and the second processing engine is configured to perform a second Rx FFT operation. ### Claim 6 (depends on 5) The method of claim 5, wherein: the first Rx FFT operation is configured to use the first FFT window based on the first timing of the serving cell; and the second Rx FFT operation is configured to use the second FFT window based on the second timing of the target cell. ### Claim 7 (depends on 1) The method of claim 1, wherein: when the UE lacks the UE capability, transmitting the indication comprises transmitting a first indication that the UE lacks the UE capability to a base station in the serving cell; and the method further comprises receiving, in response to the first indication, a second indication of a set of the one or more first resources that are blanked from a base station. ### Claim 8 An apparatus for wireless communication, comprising: a transmitter configured to transmit an indication based on a capability of the apparatus to simultaneously receive downlink data from a serving cell on one or more first resources and measure one or more channel state information (CSI) reference signals (CSI-RSs) from a target cell on one or more second resources, wherein the one or more first resources at least partially overlap the one or more second resources in a time domain and a frequency domain; one or more processors collectively configured to perform a CSI-RS measurement procedure, based on the capability; and one or more memories coupled to the one or more processors, wherein: the apparatus lacks the capability when the apparatus comprises a single processing engine configured to process the downlink data and measure the one or more CSI-RSs, the single processing engine being configured to use a first Fast Fourier Transform (FFT) window based on a first timing of the serving cell; and when the apparatus lacks the capability, in order to perform the CSI-RS measurement procedure, the one or more processors are collectively configured to: reconfigure the single processing engine to use a second FFT window based on a second timing of the target cell during a set of the one or more first resources; and use the reconfigured single processing engine to measure the one or more CSI-RSs on the one or more second resources during the set of the one or more first resources. ### Claim 9 (depends on 8) The apparatus of claim 8, further comprising a receiver configured to receive the downlink data on the one or more first resources, wherein the one or more processors are collectively configured to perform the CSI-RS measurement procedure by simultaneously processing the downlink data received on the one or more first resources and measuring the one or more CSI-RSs on the one or more second resources, when the apparatus has the capability. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the one or more processors are collectively configured to simultaneously process the downlink data and measure the one or more CSI-RSs during a same orthogonal frequency division multiplexing (OFDM) symbol. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein the apparatus has the capability when the apparatus comprises a first processing engine configured to process the downlink data received on the one or more first resources and a second processing engine configured to process measurements of CSI-RSs on the one or more second resources. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein: the first processing engine is configured to perform a first receive (Rx) FFT operation; and the second processing engine is configured to perform a second Rx FFT operation. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein: the first Rx FFT operation is configured to use the first FFT window based on the first timing of the serving cell; and the second Rx FFT operation is configured to use the second FFT window based on the second timing of the target cell. ### Claim 14 (depends on 8) The apparatus of claim 8, wherein: when the apparatus lacks the capability, transmitting the indication comprises transmitting a first indication that the apparatus lacks the capability to a base station in the serving cell; and the apparatus further comprises a receiver configured to receive, in response to the first indication, a second indication of a set of the one or more first resources that are blanked from a base station. ### Claim 15 A method for wireless communication by a base station in a serving cell, the method comprising: receiving, from a user equipment (UE), a first indication of whether the UE has a capability to simultaneously receive downlink data from the serving cell on one or more first resources and measure one or more channel state information (CSI) reference signals (CSI-RSs) from a first target cell on one or more second resources, wherein the one or more first resources at least partially overlap the one or more second resources in a time domain and a frequency domain; determining one or more third resources for measuring CSI-RSs from a second target cell; determining a configuration for scheduling transmission of the downlink data on the one or more first resources, based in part on the first indication, a timing of the first target cell, and a timing of the second target cell; and transmitting a second indication of the configuration to the UE. ### Claim 16 (depends on 15) The method of claim 15, wherein determining the configuration for scheduling transmission of the downlink data comprises determining whether to enable a blanking of at least one of the one or more first resources, based in part on the first indication. ### Claim 17 (depends on 16) The method of claim 16, wherein: the first indication indicates that the UE lacks the capability; determining the configuration for scheduling transmission of the downlink data comprises determining to enable the blanking of the at least one of the one or more first resources; and the configuration comprises an indication of the at least one of the one or more first resources that is blanked. ### Claim 18 (depends on 17) The method of claim 17, wherein a number of the at least one of the one or more first resources that is blanked is based on a timing of the serving cell and a timing of the first target cell. ### Claim 19 (depends on 17) The method of claim 17, wherein the at least one of the one or more first resources comprises a first orthogonal frequency division multiplexing (OFDM) symbol that overlaps with at least one OFDM symbol of the one or more second resources configured for measuring a CSI-RS. ### Claim 20 (depends on 19) The method of claim 19, wherein the at least one of the one or more first resources further comprises: at least one second OFDM symbol that is adjacent and prior to the first OFDM symbol; and at least one third OFDM symbol that is adjacent and after the first OFDM symbol, wherein the at least one second OFDM symbol and the at least one third OFDM symbol are configured as guard symbols. ### Claim 21 (depends on 16) The method of claim 16, wherein: the first indication indicates that the UE does have the capability; determining the configuration for scheduling transmission of the downlink data comprises determining to disable the blanking of the at least one of the one or more first resources; and the configuration indicates that the blanking is disabled for the at least one of the one or more first resources. ### Claim 22 (depends on 16) The method of claim 16, wherein the configuration comprises an indication of a number of guard symbols between the one or more second resources and the one or more third resources. ### Claim 23 An apparatus for wireless communication, comprising: a receiver configured to receive, from a user equipment (UE), a first indication of whether the UE has a capability to simultaneously receive downlink data from a serving cell on one or more first resources and measure one or more channel state information (CSI) reference signals (CSI-RSs) from a first target cell on one or more second resources, wherein the one or more first resources at least partially overlap the one or more second resources in a time domain and a frequency domain; one or more processors collectively configured to: determine one or more third resources for measuring CSI-RSs from a second target cell; and determine a configuration for scheduling transmission of the downlink data on the one or more first resources, based in part on the first indication, a timing of the first target cell, and a timing of the second target cell; a transmitter configured to transmit a second indication of the configuration to the UE; and one or more memories coupled to the one or more processors. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the determination of the configuration comprises a determination of whether to enable a blanking of at least one of the one or more first resources, based in part on the first indication. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein: the first indication indicates that the UE lacks the capability; the determination of the configuration comprises a determination to enable the blanking of the at least one of the one or more first resources; and the configuration comprises an indication of the at least one of the one or more first resources that is blanked. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein a number of the at least one of the one or more first resources that is blanked is based on a timing of the serving cell and a timing of the first target cell. ### Claim 27 (depends on 25) The apparatus of claim 25, wherein the at least one of the one or more first resources comprises a first orthogonal frequency division multiplexing (OFDM) symbol that overlaps with at least one OFDM symbol of the one or more second resources configured for measuring a CSI-RS. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the at least one of the one or more first resources further comprises: at least one second OFDM symbol that is adjacent and prior to the first OFDM symbol; and at least one third OFDM symbol that is adjacent and after the first OFDM symbol, wherein the at least one second OFDM symbol and the at least one third OFDM symbol are configured as guard symbols. ### Claim 29 (depends on 24) The apparatus of claim 24, wherein: the first indication indicates that the UE does have the capability; the determination of the configuration comprises a determination to disable the blanking of the at least one of the one or more first resources; and the configuration indicates that the blanking is disabled for the at least one of the one or more first resources. ### Claim 30 (depends on 24) The apparatus of claim 24, wherein the configuration comprises an indication of a number of guard symbols between the one or more second resources and the one or more third resources.