# US 2021/0243759 A1 · Communication terminal measurement system, communication terminal measurement apparatus, and communication terminal test method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243759 A1 - Document ID: US20210243759A1 - Status: Published application - Kind: A1 - Application number: 17/158,384 - Filed: 2021-01-26 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: Anritsu Corporation - Applicants: Anritsu Corporation - Inventors: Toru YAMASAKI; Daiki KANO; Yuki NARUSE - Web page: https://patentgrep.com/patent/US20210243759A1 ## 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)} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L 1/24: Testing correct operation - H04W 24/06: Testing, {supervising or monitoring} using simulated traffic - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/541: using the level of interference - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04W 16/14: Spectrum sharing arrangements {between different networks} - 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 An object of the present invention is to provide a communication terminal measurement system capable of testing a mobile communication terminal compatible with a plurality of communication standards having overlapping frequency bands in a state where the frequency bands overlap. In the communication terminal measurement system according to the present invention, the control apparatus 31 acquires the second frequency band information from the second storage unit 21m of the second mobile terminal measurement apparatus 21, and inputs parameters for avoiding all or a part of the frequency band to the storage unit 20m of the first mobile terminal measurement apparatus 20, whereby avoiding the mobile communication terminal 11a from refusing to receive signals due to input of signals of both two communication standards. ## Claims ### Claim 1 A communication terminal measurement system comprising: a first mobile terminal measurement apparatus compatible with a first communication standard for mobile communication in which one symbol is composed of a plurality of subcarriers; a second mobile terminal measurement apparatus compatible with a second communication standard for mobile communication in which one symbol is composed of a plurality of subcarriers; and a control apparatus that controls the first mobile terminal measurement apparatus and the second mobile terminal measurement apparatus, the system testing a mobile communication terminal compatible with the first communication standard and the second communication standard, by transmitting and receiving test signals between the mobile communication terminal and either of the first mobile terminal measurement apparatus or the second mobile terminal measurement apparatus, wherein the first mobile terminal measurement apparatus has a first storage unit that stores first frequency band information about the test signal of the first communication standard, the second mobile terminal measurement apparatus has a second storage unit that stores second frequency band information about the test signal of the second communication standard, and the control apparatus acquires the second frequency band information from the second storage unit, and performs output control for turning off an output of the test signal of the first communication standard for a part of the first frequency band, with respect to the first mobile terminal measurement apparatus, when the first frequency band and the second frequency band overlap. ### Claim 2 (depends on 1) The communication terminal measurement system according to claim 1, wherein the part of the first frequency band is the second frequency band. ### Claim 3 (depends on 2) The communication terminal measurement system according to claim 2, wherein the first communication standard is NR, and the second communication standard is LTE, the second storage unit stores “DL Center Channel” and “DL Channel Bandwidth” as the second frequency band information, and the control apparatus uses the “DL Center Channel” as “LTE DL Channel”, and uses the “DL Channel Bandwidth” as “LTE Channel Bandwidth”, and causes the first mobile terminal measurement apparatus to perform the output control. ### Claim 4 (depends on 1) The communication terminal measurement system according to claim 1, wherein the second storage unit further stores mapping information in which a reference signal of the second communication standard is represented by the symbols and the subcarriers, the control apparatus further acquires the mapping information from the second storage unit, and the part of the first frequency band is a region in which the reference signal based on the mapping information is disposed. ### Claim 5 (depends on 4) The communication terminal measurement system according to claim 4, wherein the control apparatus includes an input unit into which the mapping information is input, and an operation unit that causes the second storage unit to update the existing mapping information to the mapping information input from the input unit, and causes the first mobile terminal measurement apparatus to perform the output control based on the updated mapping information. ### Claim 6 (depends on 4) The communication terminal measurement system according to claim 4, wherein the first communication standard is NR, and the second communication standard is LTE, the second storage unit stores “DL Center Channel” and “DL Channel Bandwidth” as the second frequency band information, and stores “Antenna Configuration” and “Cell ID” as the mapping information, and the control apparatus uses the “DL Center Channel” as “LTE DL Channel”, and uses the “DL Channel Bandwidth” as “LTE Channel Bandwidth”, converts the “Antenna Configuration” into “Number of CRS Ports”, based on a conversion table, converts the “Cell ID” into “LTE v-Shift” by performing surplus operation by 6, and causes the first mobile terminal measurement apparatus to perform the output control. ### Claim 7 (depends on 4) The communication terminal measurement system according to claim 4, wherein the region is a subcarrier unit within the symbol. ### Claim 8 (depends on 4) The communication terminal measurement system according to claim 4, wherein the region is a symbol unit. ### Claim 9 (depends on 1) The communication terminal measurement system according to claim 1, wherein the second storage unit further stores downlink data channel information which is a resource block occupied by a downlink data signal of the second frequency band from the second mobile terminal measurement apparatus to the mobile communication terminal, the control apparatus further acquires the downlink data channel information, and the part of the first frequency band is a band in which the resource block based on the downlink data channel information is present. ### Claim 10 (depends on 9) The communication terminal measurement system according to claim 9, wherein the downlink data channel information is a start position of the resource block on a lowest frequency side and the number of the resource blocks. ### Claim 11 (depends on 10) The communication terminal measurement system according to claim 10, wherein the first communication standard is NR, and the second communication standard is LTE, the second storage unit stores “DL Center Channel” and “DL Channel Bandwidth” as the second frequency band information, stores “DL RMC-Starting RB” as the start position of the resource block, and stores “DLRMC-Number of RB” as the number of the resource blocks, and the control apparatus uses the “DL Center Channel” as “LTE DL Channel”, uses the “DL Channel Bandwidth” as “LTE Channel Bandwidth”, uses the “DL RMC-Starting RB” as “LTE DL Starting RB”, uses the “DLRMC-Number of RB” as “LTE DL Number of RB”, and causes the first mobile terminal measurement apparatus to perform the output control. ### Claim 12 A mobile terminal measurement apparatus comprising: a first storage unit that is compatible with a first communication standard for mobile communication in which one symbol is composed of a plurality of subcarriers, and stores first frequency band information about a test signal of the first communication standard; a first transmission and reception unit that transmits and receives a test signal compatible with the first communication standard; a second storage unit that is compatible with a second communication standard for mobile communication in which one symbol is composed of a plurality of subcarriers, and stores second frequency band information about a test signal of the second communication standard; and a second transmission and reception unit that transmits and receives a test signal of the second communication standard, wherein when testing a mobile communication terminal compatible with the first communication standard and the second communication standard by transmitting and receiving the test signals between the mobile communication terminal and either of the first transmission and reception unit or the second transmission and reception unit, the first transmission and reception unit acquires the second frequency band information from the second storage unit, and performs output control for turning off an output of the test signal of the first communication standard for a part of the first frequency band, when the first frequency band and the second frequency band overlap. ### Claim 13 (depends on 12) The communication terminal measurement apparatus according to claim 12, wherein the part of the first frequency band is the second frequency band. ### Claim 14 (depends on 12) The communication terminal measurement apparatus according to claim 12, wherein the second storage unit further stores mapping information in which a reference signal of the second communication standard is represented by the symbols and the subcarriers, the first transmission and reception unit further acquires the mapping information from the second storage unit, and the part of the first frequency band is a region in which the reference signal based on the mapping information is disposed. ### Claim 15 (depends on 12) The communication terminal measurement apparatus according to claim 12, wherein the second storage unit further stores downlink data channel information which is a resource block occupied by a downlink data signal of the second frequency band from the second mobile terminal measurement apparatus to the mobile communication terminal, the first transmission and reception unit further acquires the downlink data channel information, and the part of the first frequency band is a band in which the resource block based on the downlink data channel information is present. ### Claim 16 A communication terminal test method which controls a first storage unit that is compatible with a first communication standard for mobile communication in which one symbol is composed of a plurality of subcarriers, and stores first frequency band information about a test signal of the first communication standard, a first transmission and reception unit that transmits and receives a test signal compatible with the first communication standard, a second storage unit that is compatible with a second communication standard for mobile communication in which one symbol is composed of a plurality of subcarriers, and stores second frequency band information about a test signal of the second communication standard, and a second transmission and reception unit that transmits and receives a test signal of the second communication standard, and tests a mobile communication terminal compatible with the first communication standard and the second communication standard by transmitting and receiving the test signals between the mobile communication terminal and either of the first transmission and reception unit or the second transmission and reception unit, the method comprising: acquiring the second frequency band information from the second storage unit; checking overlap between the first frequency band and the second frequency band; and performing output control for turning off an output of the test signal of the first communication standard for a part of the first frequency band, with respect to the first transmission and reception unit, when the first frequency band and the second frequency band overlap. ### Claim 17 (depends on 16) The communication terminal test method according to claim 16, wherein the part of the first frequency band is the second frequency band. ### Claim 18 (depends on 16) The communication terminal test method according to claim 16, wherein the second storage unit further stores mapping information in which a reference signal of the second communication standard is represented by the symbols and the subcarriers, when the second frequency band information is acquired from the second storage unit, the mapping information is further acquired from the second storage unit, and the part of the first frequency band is a region in which the reference signal based on the mapping information is disposed. ### Claim 19 (depends on 16) The communication terminal test method according to claim 16, wherein the second storage unit further stores downlink data channel information which is a resource block occupied by a downlink data signal of the second frequency band from the second mobile terminal measurement apparatus to the mobile communication terminal, when the second frequency band information is acquired from the second storage unit, the downlink data channel information is further acquired, and the part of the first frequency band is a band in which the resource block based on the downlink data channel information is present.