# US 2021/0243631 A1 · Secondary cell group selection based on primary frequency band measurements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243631 A1 - Document ID: US20210243631A1 - Status: Published application - Kind: A1 - Application number: 17/155,888 - Filed: 2021-01-22 - Published: 2021-08-05 - Earliest claimed: 2020-01-31 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Hamed PEZESHKI; Tao LUO; Sony AKKARAKARAN; Arumugam CHENDAMARAI KANNAN; Taesang YOO; Ajay GUPTA; Mahmoud TAHERZADEH BOROUJENI; Jingchao BAO - Web page: https://patentgrep.com/patent/US20210243631A1 ## CPC - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - G06N 3/045: Combinations of networks - G06N 3/0464: Convolutional networks [CNN, ConvNet] - G06N 3/084: Backpropagation, e.g. using gradient descent - G06N 3/09: Supervised learning - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/086: {using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming} - H04W 24/02: Arrangements for optimising operational condition - H04W 52/0258: {controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day} - H04W 52/028: {switching on or off only a part of the equipment circuit blocks} - H04W 76/15: Setup of multiple wireless link connections - H04W 76/27: Transitions between radio resource control [RRC] states - G06N 3/044: Recurrent networks, e.g. Hopfield networks - G06N 3/047: Probabilistic or stochastic networks - H04L 5/0057: {Physical resource allocation for CQI} - H04W 36/0088: {Scheduling hand-off measurements} - H04W 48/20: Selecting an access point - H04W 52/0264: {by selectively disabling software applications} - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G06N: COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A method of wireless communication by a user equipment (UE) may include receiving a message requesting estimated channel characteristics of a secondary band based on measuring characteristics of a channel in the primary band. The method also includes measuring characteristics of the channel in the primary band. The method estimates channel characteristics of the secondary band based on the primary band characteristics measurements. The estimating may occur without measuring signals in the secondary band. Further, the method may report the estimated channel characteristics of the secondary band and receive an indication of a secondary cell group, based on the estimated channel characteristics of the secondary band. ## Claims ### Claim 1 A method of wireless communication by a user equipment (UE), comprising: receiving a message requesting estimated channel characteristics of a secondary band based on measuring of characteristics of a channel in a primary band; measuring characteristics of the channel in the primary band; estimating channel characteristics of the secondary band based on measured characteristics of the channel in the primary band, the estimating occurring without measuring signals in the secondary band; and reporting the estimated channel characteristics of the secondary band. ### Claim 2 (depends on 1) The method of claim 1, further comprising receiving an indication of a secondary cell group, which was determined based on the estimated channel characteristics of the secondary band. ### Claim 3 (depends on 1) The method of claim 1, in which the measured characteristics of the channel in the primary band are measurements of signals transmitted by a non-serving cell. ### Claim 4 (depends on 3) The method of claim 3, in which the non-serving cell comprises a collocated first base station of a first radio access technology (RAT) and a second base station of a second RAT. ### Claim 5 (depends on 1) The method of claim 1, further comprising removing a potential secondary cell group from consideration based on determining that estimated channel characteristics of the potential secondary cell group are below a threshold. ### Claim 6 (depends on 1) The method of claim 1, in which measuring characteristics of the channel in the primary band comprises at least one of measuring reference signal received power (RSRP) of the channel in the primary band, performing a channel estimate of the channel in the primary band, measuring a channel impulse response (CIR) of the channel in the primary band, measuring an angle of departure of the channel in the primary band, measuring an angle of arrival of the channel in the primary band, measuring a channel path delay of the channel in the primary band, determining a user equipment (UE) position, and analyzing a power delay profile of the channel in the primary band. ### Claim 7 (depends on 1) The method of claim 1, further comprising: reporting the estimated channel characteristics of the secondary band based on an existing channel state information (CSI) signal and a report configuration received from a master base station in a radio resource control (RRC) message; and reporting measurements of the characteristics of the channel in the primary band based on the existing CSI signal. ### Claim 8 (depends on 1) The method of claim 1, further comprising: reporting measurements of the characteristics of the channel in the primary band based on a first type of channel state information (CSI) signal; and reporting the estimated channel characteristics of the secondary band based on a second type of CSI signal and a report configuration, which is received from a master base station in a radio resource control (RRC) message and corresponds to the second type of CSI signal. ### Claim 9 (depends on 1) The method of claim 1, in which reporting the estimated channel characteristics further comprises reporting a list of bands to which the estimated channel characteristics apply. ### Claim 10 (depends on 1) The method of claim 1, in which the primary band is lower in frequency than the secondary band. ### Claim 11 (depends on 1) The method of claim 1, in which the estimating channel characteristics of the secondary band is performed with neural network processing. ### Claim 12 A method of wireless communication by a base station, comprising: configuring a user equipment (UE) to estimate channel characteristics of a secondary band based on measurements of a primary band; configuring reporting of the estimated channel characteristics of the secondary band; and selecting a secondary cell group (SCG) based on the estimated channel characteristics of the secondary band rather than measurements of the secondary band. ### Claim 13 (depends on 12) The method of claim 12, in which configuring reporting comprises configuring a new report for estimated channel characteristics of the secondary band based on incumbent channel state information (CSI) signals. ### Claim 14 (depends on 12) The method of claim 12, in which configuring reporting comprises configuring a new channel state information (CSI) signal and a new corresponding report for the estimated channel characteristics of the secondary band. ### Claim 15 A user equipment (UE) for wireless communication comprising: a memory, and at least one processor operatively coupled to the memory, the memory and the at least one processor configured: to receive a message requesting estimated channel characteristics of a secondary band based on measuring of characteristics of a channel in a primary band; to measure characteristics of the channel in the primary band; to estimate channel characteristics of the secondary band based on measured characteristics of the channel in the primary band, the estimating occurring without measuring signals in the secondary band; and to report the estimated channel characteristics of the secondary band. ### Claim 16 (depends on 15) The UE of claim 15, in which the at least one processor is further configured to receive an indication of a secondary cell group, which was determined based on the estimated channel characteristics. ### Claim 17 (depends on 15) The UE of claim 15, in which the measured characteristics of the channel in the primary band are measurements of signals transmitted by a non-serving cell. ### Claim 18 (depends on 17) The UE of claim 17, in which the non-serving cell comprises a collocated first base station of a first radio access technology (RAT) and a second base station of a second RAT. ### Claim 19 (depends on 15) The UE of claim 15, in which the at least one processor is further configured to remove a potential secondary cell group from consideration based on determining that the estimated channel characteristics of the potential secondary cell group are below a threshold. ### Claim 20 (depends on 15) The UE of claim 15, in which the at least one processor is further configured to measure characteristics by at least one of measuring reference signal received power (RSRP) of the channel in the primary band, performing a channel estimate of the channel in the primary band, measuring a channel impulse response (CIR) of the channel in the primary band, measuring an angle of departure of the channel in the primary band, measuring an angle of arrival of the channel in the primary band, measuring a channel path delay of the channel in the primary band, determining a user equipment (UE) position, and analyzing a power delay profile of the of the channel in the primary band. ### Claim 21 (depends on 15) The UE of claim 15, in which the at least one processor is further configured: to report the estimated channel characteristics of the secondary band based on an existing channel state information (CSI) signal and a report configuration received from a master base station in a radio resource configuration (RRC) message; and to report measurements of the characteristics of the channel in the primary band based on the existing CSI signal. ### Claim 22 (depends on 15) The UE of claim 15, in which the at least one processor is further configured: to report measurements of the characteristics of the channel in the primary band based on a first type of channel state information (CSI) signal; and to report the estimated channel characteristics of the secondary band based on a second type of CSI signal and a report configuration, which is received from a master base station in a radio resource control (RRC) message and corresponds to the second type of CSI signal. ### Claim 23 (depends on 15) The UE of claim 15, in which the at least one processor is further configured to report the estimated channel characteristics by reporting a list of bands to which the estimated channel characteristics apply. ### Claim 24 (depends on 15) The UE of claim 15, in which the primary band is lower in frequency than the secondary band. ### Claim 25 (depends on 15) The UE of claim 15, in which the at least one processor is further configured to estimate with neural network processing. ### Claim 26 A base station for wireless communication comprising: a memory, and at least one processor operatively coupled to the memory, the memory and the at least one processor configured: to configure a user equipment (UE) to estimate channel characteristics of a secondary band based on measurements of a primary band; to configure reporting of the estimated channel characteristics of the secondary band; and to select a secondary cell group (SCG) based on the estimated channel characteristics of the secondary band rather than measurements of the secondary band. ### Claim 27 (depends on 26) The base station of claim 26, in which the at least one processor is further configured to configure a new report for estimated channel characteristics of the secondary band based on incumbent channel state information (CSI) signals. ### Claim 28 (depends on 26) The base station of claim 26, in which the at least one processor is further configured to configure a new channel state information (CSI) signal and a new corresponding report for the estimated channel characteristics of the secondary band.