# US 11,444,722 B2 · Method for determining CQI information, base station, and user equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,722 B2 - Document ID: US11444722B2 - Status: Granted - Kind: B2 - Application number: 16/802,244 - Filed: 2020-02-26 - Published: 2020-06-18 - Granted: 2022-09-13 - Earliest claimed: 2017-09-01 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Juejia Zhou - Web page: https://patentgrep.com/patent/US11444722B2 ## CPC - H04L 1/0026: {Transmission of channel quality indication} - H04L 1/0039: {other detection of signalling, e.g. detection of TFCI explicit signalling (H04L1/0046, H04L27/0012 and H04L25/0262 take precedence)} - H04L 5/0057: {Physical resource allocation for CQI} - H04L 5/0062: {Avoidance of ingress interference, e.g. ham radio channels} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/1273: of downlink data flows - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/541: using the level of interference - H04W 72/542: using measured or perceived quality - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)} - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - 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 A method for determining channel quality indication (CQI) information, implemented by a base station, includes: determining whether intra-device interference occurrence situations of user equipment (UE) in a CQI measurement period and a subsequent downlink (DL) scheduling period of a bandwidth granularity are the same; and in response to the intra-device interference occurrence situations being different, determining a CQI level for subsequent DL scheduling in the bandwidth granularity based on a preset offset. ## Claims ### Claim 1 A method for determining channel quality indication (CQI) information, performed by a base station, the method comprising: determining whether intra-device interference occurrence situations of user equipment (UE) in a CQI measurement period and a subsequent downlink (DL) scheduling period of a bandwidth granularity are the same; and in response to the intra-device interference occurrence situations being different, determining a CQI level for a subsequent DL scheduling in the bandwidth granularity based on a preset offset. ### Claim 2 (depends on 1) The method of claim 1, wherein in response to the intra-device interference occurrence situations being different, determining the CQI level for the subsequent DL scheduling in the bandwidth granularity based on the preset offset comprises: in response to the intra-device interference occurrence situations being different, determining a frequency range involved in intra-device interference in the bandwidth granularity; sending CQI modification indication information to the UE, wherein the CQI modification indication information comprises the frequency range; and receiving the CQI level from the UE, wherein the CQI level is a CQI level determined after the UE modifies an original measured value of a reference signal in the frequency range based on the preset offset. ### Claim 3 (depends on 2) The method of claim 2, wherein the CQI modification indication information further comprises the preset offset for modifying influence of the intra-device interference. ### Claim 4 (depends on 1) The method of claim 1, further comprising: determining the preset offset corresponding to the UE, wherein the preset offset is an intra-device interference influence value of an interference sub-band and the interference sub-band is a DL frequency range involved in the intra-device interference. ### Claim 5 (depends on 4) The method of claim 4, wherein determining the preset offset corresponding to the UE comprises: when the UE initially accesses a network, sending offset measurement indication information to the UE, wherein the offset measurement indication information is to instruct the UE to measure CQI information in an intra-device interference occurrence period and an intra-device interference-free period in the interference sub-band respectively; and determining the preset offset corresponding to the UE according to a CQI measurement result obtained by the UE. ### Claim 6 (depends on 5) The method of claim 5, wherein determining the preset offset corresponding to the UE according to the CQI measurement result obtained by the UE comprises performing one of: acquiring first measured CQI information measured by the UE in the intra-device interference occurrence period in the interference sub-band; acquiring second measured CQI information measured by the UE in the intra-device interference-free period in the interference sub-band; and determining the preset offset corresponding to the UE according to a difference between the first measured CQI information and the second measured CQI information, or acquiring a CQI measurement result difference from the UE, wherein the CQI measurement result difference is a difference between measurement results obtained by the UE in the intra-device interference occurrence period and the intra-device interference-free period in the interference sub-band; and determining the preset offset corresponding to the UE according to the CQI measurement result difference. ### Claim 7 (depends on 4) The method of claim 4, wherein the preset offset comprises one of: a reference signal received power (RSRP) offset, a received signal reference quality (RSRQ) offset, or a CQI level offset. ### Claim 8 A base station, comprising: a processor; and a memory configured to store instructions executable by the processor, wherein the processor is configured to: determine whether intra-device interference occurrence situations of user equipment (UE) in a channel quality indication (CQI) measurement period and a subsequent downlink (DL) scheduling period of a bandwidth granularity are the same; and in response to the intra-device interference occurrence situations being different, determine a CQI level for a subsequent DL scheduling in the bandwidth granularity based on a preset offset. ### Claim 9 (depends on 8) The base station of claim 8, wherein the processor is further configured to: in response to the intra-device interference occurrence situations being different, determine a frequency range involved in intra-device interference in the bandwidth granularity; send CQI modification indication information to the UE, where the CQI modification indication information comprises the frequency range; and receive the CQI level from the UE, wherein the CQI level is a CQI level determined after the UE modifies an original measured value of a reference signal in the frequency range based on the preset offset. ### Claim 10 (depends on 8) The base station of claim 8, wherein the processor is further configured to: determine the preset offset corresponding to the UE, wherein the preset offset is an intra-device interference influence value of an interference sub-band and the interference sub-band is a DL frequency range involved in the intra-device interference. ### Claim 11 (depends on 10) The base station of claim 10, wherein the processor is further configured to: when the UE initially accesses a network, send offset measurement indication information to the UE, wherein the offset measurement indication information is configured to instruct the UE to measure CQI information in an intra-device interference occurrence period and an intra-device interference-free period in the interference sub-band respectively; and determine the preset offset corresponding to the UE according to a CQI measurement result obtained by the UE. ### Claim 12 (depends on 9) The base station of claim 9, wherein the CQI modification indication information further comprises the preset offset for modifying influence of the intra-device interference. ### Claim 13 (depends on 11) The base station of claim 11, wherein the processor is further configured to: acquire first measured CQI information measured by the UE in the intra-device interference occurrence period in the interference sub-band; acquire second measured CQI information measured by the UE in the intra-device interference-free period in the interference sub-band; and determine the preset offset corresponding to the UE according to a difference between the first measured CQI information and the second measured CQI information, or acquire a CQI measurement result difference from the UE, wherein the CQI measurement result difference is a difference between measurement results obtained by the UE in the intra-device interference occurrence period and the intra-device interference-free period in the interference sub-band; and determine the preset offset corresponding to the UE according to the CQI measurement result difference. ### Claim 14 (depends on 10) The base station of claim 10, wherein the preset offset comprises one of: a reference signal received power (RSRP) offset, a received signal reference quality (RSRQ) offset, or a CQI level offset. ### Claim 15 A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of a base station, cause the base station to perform a method for determining channel quality indication (CQI) information, the method comprising: determining whether intra-device interference occurrence situations of user equipment (UE) in a CQI measurement period and a subsequent downlink (DL) scheduling period of a bandwidth granularity are the same; and in response to the intra-device interference occurrence situations being different, determining a CQI level for a subsequent DL scheduling in the bandwidth granularity based on a preset offset. ### Claim 16 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein in response to the intra-device interference occurrence situations being different, determining the CQI level for subsequent DL scheduling in the bandwidth granularity based on the preset offset comprises: in response to the intra-device interference occurrence situations being different, determining a frequency range involved in intra-device interference in the bandwidth granularity; sending CQI modification indication information to the UE, wherein the CQI modification indication information comprises the frequency range; and receiving the CQI level from the UE, wherein the CQI level is a CQI level determined after the UE modifies an original measured value of a reference signal in the frequency range based on the preset offset. ### Claim 17 (depends on 16) The non-transitory computer-readable storage medium of claim 16, wherein the CQI modification indication information further comprises the preset offset for modifying influence of the intra-device interference. ### Claim 18 (depends on 15) The non-transitory computer-readable storage medium of claim 15, the method further comprising: determining the preset offset corresponding to the UE, wherein the preset offset is an intra-device interference influence value of an interference sub-band and the interference sub-band is a DL frequency range involved in the intra-device interference. ### Claim 19 (depends on 18) The non-transitory computer-readable storage medium of claim 18, wherein determining the preset offset corresponding to the UE comprises: when the UE initially accesses a network, sending offset measurement indication information to the UE, wherein the offset measurement indication information is to instruct the UE to measure CQI information in an intra-device interference occurrence period and an intra-device interference-free period in the interference sub-band respectively; and determining the preset offset corresponding to the UE according to a CQI measurement result obtained by the UE. ### Claim 20 (depends on 19) The non-transitory computer-readable storage medium of claim 19, wherein determining the preset offset corresponding to the UE according to the CQI measurement result obtained by the UE comprises performing one of: acquiring first measured CQI information measured by the UE in the intra-device interference occurrence period in the interference sub-band; acquiring second measured CQI information measured by the UE in the intra-device interference-free period in the interference sub-band; and determining the preset offset corresponding to the UE according to a difference between the first measured CQI information and the second measured CQI information, or acquiring a CQI measurement result difference from the UE, wherein the CQI measurement result difference is a difference between measurement results obtained by the UE in the intra-device interference occurrence period and the intra-device interference-free period in the interference sub-band; and determining the preset offset corresponding to the UE according to the CQI measurement result difference.