# US 2021/0345142 A1 · Apparatus, system and method for testing radio equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345142 A1 - Document ID: US20210345142A1 - Status: Published application - Kind: A1 - Application number: 17/283,162 - Filed: 2019-10-10 - Published: 2021-11-04 - Earliest claimed: 2018-10-12 - Assignees: Siemens Industry Software Inc. - Applicants: Siemens Industry Software Inc. - Inventors: Kari Vierimaa - Web page: https://patentgrep.com/patent/US20210345142A1 ## CPC - H04W 24/00: Supervisory, monitoring or testing arrangements - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 24/06: Testing, {supervising or monitoring} using simulated traffic - 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 of testing radio equipment is disclosed herein. The method includes: receiving, by way of a radio channel test apparatus, a baseband signal representing I/Q data of one or more radio channels; processing, by way of the radio channel test apparatus, the baseband signal representing I/Q data according to one or more radio channel models; and transmitting, by way of the radio channel test apparatus, the processed baseband data representing I/Q data to a radio equipment under test. ## Claims ### Claim 1 A method of testing radio equipment, the method comprising: receiving, by way of a radio channel test apparatus, baseband data representing in-phase and quadrature components (I/Q) data of one or more radio channels via a first section of a fronthaul communication link; processing, by way of the radio channel test apparatus, the baseband data representing I/Q data received via the first section of the fronthaul communication link according to a downlink channel model of a first radio channel; transmitting, by way of the radio channel test apparatus, the processed baseband data representing I/Q data to a radio equipment under test data via a second section of the fronthaul communication link; receiving, by the radio channel test apparatus, baseband data via the second section of the fronthaul communication link; processing, by the radio channel test apparatus, the baseband data received via the second section of the fronthaul communication link according to an uplink channel model of the first radio channel; and transmitting, by the radio channel test apparatus, the processed baseband data via the first section of the fronthaul communication link. ### Claim 2 (depends on 1) The method of claim 1, wherein the radio equipment under test is a base band unit, one or more remote radio heads, one or more terminal devices, or a combination thereof. ### Claim 3 (depends on 1) The method of claim 1, further comprising: receiving, by way of the radio channel test apparatus, the baseband signal representing I/Q data via a communication link according to a functional split of the fronthaul communication link; and/or transmitting, by way of the radio channel test apparatus, the baseband signal representing I/Q data via the communication link according to the functional split of the fronthaul communication link. ### Claim 4 (depends on 1) The method of claim 1, further comprising: receiving, by way of the radio channel test apparatus, the baseband signal via fronthaul communication link; and/or transmitting, by way of the radio channel test apparatus, the baseband signal via the fronthaul communication link, wherein the I/Q data received via the communication link represents time domain I/Q data or frequency domain I/Q data. ### Claim 5 (depends on 4) The method of claim 4, further comprising: converting the I/Q data from the time domain I/Q data to the frequency domain I/Q data; and processing the I/Q data according to one or more radio channel models in the frequency domain. ### Claim 6 (depends on 4) The method of claim 4, further comprising: converting the I/Q data from the frequency domain I/Q data to the time domain I/Q data, and processing the I/Q data according to one or more radio channel models in the time domain. ### Claim 7 (depends on 1) The method of claim 1, further comprising: uncompressing the I/Q data received in a compressed format; processing the uncompressed I/Q data according to one or more radio channel models; and/or compressing the processed I/Q data; and transmitting the compressed I/Q data. ### Claim 8 (depends on 7) The method of claim 7, further comprising: monitoring the processed I/Q data; and determining a condition of the radio equipment under test based on the monitored I/Q data. ### Claim 9 (depends on 1) The method of claim 1, further comprising: modeling, by way of the radio channel test apparatus, propagation of radio signals of one or more radio channels via an air interface. ### Claim at position 10 -11. (canceled) ### Claim 12 (depends on 1) The method of claim 1, wherein the baseband data of the first section of the communication link is encoded according to a first protocol (CPRI), wherein the baseband data of the second section of the communication link is encoded according to a second protocol, and wherein the second protocol is a different protocol than the first protocol. ### Claim 13 (depends on 1) The method of claim 1, further comprising: processing, by way of the radio channel test apparatus, the baseband data received via the first section and the baseband data received via the second section of the fronthaul link in parallel or in a cascaded manner, wherein the baseband data received via the first and the second section relates to a same radio channel. ### Claim 14 (depends on 1) The method of claim 1, further comprising: operating the radio channel test apparatus in the fronthaul communication link between a physical or virtual radio equipment control at least one physical or virtual radio equipment. ### Claim 15 (depends on 1) The method of claim 1, wherein the baseband signal comprises I/Q data relating to multiple radio channels, and wherein the method further comprises: processing, by way of the radio channel test apparatus, the baseband signal comprising I/Q data of each radio channel of the multiple radio channels according to a radio channel model associated with each radio channel of the multiple radio channels; and transmitting, by way of the radio channel test apparatus, the processed baseband signal comprising I/Q data via the fronthaul communication link. ### Claim 16 (depends on 15) The method of claim 15, further comprising: processing, by way of the radio channel test apparatus, the baseband data of each radio channel of the multiple radio channels in parallel or in a cascaded manner. ### Claim 17 (depends on 16) The method of claim 16, further comprising: processing, by way of the radio channel test apparatus, baseband signal comprising I/Q data of each radio channel of the multiple radio channels, wherein the radio channel test apparatus comprises consecutively interconnected devices for processing the baseband signal comprising I/Q data of the multiple radio channels, and wherein each device processes baseband signal of at least one radio channel of the multiple radio channels. ### Claim 18 (canceled) ### Claim 19 A radio channel test apparatus comprising: a first interface for receiving baseband data comprising in-phase and quadrature components (I/Q) data via a first section of a fronthaul communication link; a processor configured to process the received baseband data received via the first section of the fronthaul communication link according to a downlink channel model of a first radio channel; and a second interface for transmitting the processed baseband data via a second section of the fronthaul communication link, wherein the second interface is further configured to receive baseband data via the second section of the fronthaul communication link, wherein the processor is further configured to process the baseband data received via the second section according to an uplink channel model of the first radio channel, and wherein the first interface is further configured to transmit the processed baseband data via the first section of the fronthaul communication link. ### Claim 20 (canceled) ### Claim 21 A system comprising: a physical or virtual radio equipment control; at least one physical or virtual radio equipment; and a radio channel test apparatus comprising: a first interface for receiving baseband data comprising in-phase and quadrature components (I/Q) data via a first section of a fronthaul communication link; a processor configured to process the received baseband data received via the first section of the fronthaul communication link according to a downlink channel model of a first radio channel; and a second interface for transmitting the processed baseband data via a second section of the fronthaul communication link, wherein the second interface is further configured to receive baseband data via the second section of the fronthaul communication link, wherein the processor is further configured to process the baseband data received via the second section according to an uplink channel model of the first radio channel, and wherein the first interface is further configured to transmit the processed baseband data via the first section of the fronthaul communication link. ### Claim 22 (depends on 21) The system of claim 21, wherein the physical or virtual radio equipment control is a physical or virtual base band unit, and wherein the at least one physical or virtual radio equipment is at least one physical or virtual remote radio head. ### Claim 23 (depends on 14) The method of claim 14, wherein the physical or virtual radio equipment control is a physical or virtual base band unit, and wherein the at least one physical or virtual radio equipment is at least one physical or virtual remote radio head.