# US 11,452,004 B2 · Method for wireless data transmission range extension > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,004 B2 - Document ID: US11452004B2 - Status: Granted - Kind: B2 - Application number: 16/346,965 - Filed: 2017-11-01 - Published: 2019-08-22 - Granted: 2022-09-20 - Earliest claimed: 2016-11-08 - Assignees: Koninklijke Philips N.V. - Applicants: Koninklijke Philips N.V. - Inventors: Hansjoerg Geywitz; Markus Wohlschlager - Web page: https://patentgrep.com/patent/US11452004B2 ## CPC - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - G16H 40/67: for remote operation - H03M 7/30: Compression (speech analysis-synthesis for redundancy reduction G10L19/00; for image communication H04N); Expansion; Suppression of unnecessary data, e.g. redundancy reduction - H03M 7/3059: {Digital compression and data reduction techniques where the original information is represented by a subset or similar information, e.g. lossy compression} - H04B 11/00: Transmission systems employing ultrasonic, sonic or infrasonic waves - H04L 69/04: Protocols for data compression, e.g. ROHC - H04Q 9/00: Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom - H04W 4/023: {using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds} - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - A61B 5/0002: {Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network (endoradiosondes A61B5/07)} - A61B 5/4343: {Pregnancy and labour monitoring, e.g. for labour onset detection} - A61B 8/4472: {Wireless probes} - H04Q 2209/40: using a wireless architecture - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA - H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract The present disclosure relates to apparatuses and a method for wireless health monitoring comprising dynamically adjusting sound data compression level and/or transmission bandwidth of transmission between a mobile transmitter and a receiver. In some embodiments, a method for wireless health monitoring may include calculating (202) a distance between a mobile transmitter (104) and a receiver (110). A data compression (108) level for compressing a signal, e.g., a sound signal, from the transmitter may be determined out of a plurality of data compression levels based on the distance between the transmitter and the receiver. A transmission bandwidth may then be determined (208) based at least in part on the determined data compression level. The compressed signal may be transmitted (210) using the determined transmission bandwidth. ## Claims ### Claim 1 A method for dynamically adjusting sound data compression level and transmission bandwidth of a wireless ultrasound transducer configured to be portable by a patient for wireless health monitoring, the method comprising: detecting an ultrasound signal using the wireless ultrasound transducer; calculating a distance between the wireless ultrasound transducer and a base station of a wireless health monitoring system based on one or more attributes of a wireless communication channel between the wireless ultrasound transducer and the base station; determining a data compression level for compressing data to be transmitted wirelessly from the wireless ultrasound transducer to the base station, based on the distance between the wireless ultrasound transducer and the base station, wherein the data represents the detected ultrasound signal; compressing the data that represents the detected ultrasound signal based on the determined data compression level to generate a compressed ultrasound data signal; determining, based at least in part on the determined data compression level, the transmission bandwidth for the wireless ultrasound transducer; transmitting the compressed ultrasound data signal from the wireless ultrasound transducer to the base station using the determined transmission bandwidth; and rendering, by the base station, a synthetic audio representative of the detected ultrasound signal in lieu of the detected ultrasound signal in response to a determination that the determined data compression level satisfies a threshold. ### Claim 2 (depends on 1) The method of claim 1, further comprising rendering, by the base station, a synthetic audio in lieu of the detected ultrasound signal, in response to a determination that a predetermined number of bit errors are detected by the base station. ### Claim 3 (depends on 2) The method of claim 2, further comprising: unpacking, at the base station, the compressed ultrasound data signal. ### Claim 4 (depends on 3) The method of claim 3, further comprising: determining whether the determined data compression level satisfies a threshold or a determining whether the predetermined number of bit errors are detected by the base station. ### Claim 5 (depends on 4) The method of claim 4, wherein a data compression level for a current transmitter-receiver distance is selected from a previously-stored reference compression level corresponding to a transmitter-receiver distance closest to the current transmitter-receiver distance. ### Claim 6 (depends on 1) The method of claim 1, wherein a data compression level for a current transmitter-receiver distance is selected from a previously-stored reference compression level corresponding to a transmitter-receiver distance closest to the current transmitter-receiver distance. ### Claim 7 (depends on 1) The method of claim 1, wherein the transmission of the compressed ultrasound data signal is terminated when one or more bit errors are detected by the base station. ### Claim 8 (depends on 1) The method of claim 1, wherein the distance between the wireless ultrasound transducer and the base station is based on a received signal strength (“RSS”) or a signal time of flight (“TOF”). ### Claim 9 (depends on 1) The method of claim 1, wherein said determining the transmission bandwidth includes selecting one or more sub-bands from a plurality of sub-bands based on the determined data compression level, and said transmitting the compressed ultrasound data signal comprises transmitting the compressed ultrasound data signal from the wireless ultrasound transducer to the base station using the selected one or more sub-bands. ### Claim 10 (depends on 1) The method of claim 1, wherein said determining of the data compression level is performed by the wireless ultrasound transducer, and wherein the method further comprises: digitizing, by the wireless ultrasound transducer, the compressed ultrasound data signal prior to transmitting the compressed ultrasound data signal to the base station; and transmitting the data compression level determined by the wireless ultrasound transducer to the base station. ### Claim 11 (depends on 1) A non-transitory computer readable medium comprising instructions executable by one or more processing units, wherein the instructions, when executed by the one or more processing units, cause the one or more processing units to carry out a method as defined in claim 1. ### Claim 12 A wireless ultrasound transducer, which is portable by a patient to be monitored and configured to communicatively couple to a base station of a wireless health monitoring system, the wireless ultrasound transducer comprising: a transmitter; and a processor configured to: calculate a distance between the wireless ultrasound transducer and the base station based on one or more attributes of a wireless communication channel between the transmitter and a receiver of the base station; determine a data compression level for compressing ultrasound data to be transmitted from the wireless ultrasound transducer to the base station based on the distance between the wireless ultrasound transducer and the base station; compress the ultrasound data to be transmitted based on the determined data compression level to generate a compressed ultrasound data signal; dynamically adjust, based at least in part on the determined data compression level, a transmission bandwidth of the wireless ultrasound transducer such that the transmitter transmits wirelessly the compressed ultrasound data signal from the wireless ultrasound transducer to the base station using the adjusted transmission bandwidth; and rendering a synthetic audio representative of a detected ultrasound signal in lieu of the detected ultrasound signal by the base station, in response to a determination that the determined data compression level satisfies a threshold. ### Claim 13 (depends on 12) The wireless ultrasound transducer according to claim 12, wherein the transmitter is further configured to transmit data indicative of the determined data compression level to the receiver together with the compressed ultrasound data signal. ### Claim 14 (depends on 12) The wireless ultrasound transducer according to claim 12, further comprising a memory for storing a plurality of reference compression levels corresponding to respective transmitter-receiver distances wherein the processor is configured to select the data compression level from the plurality of reference compression levels by selecting a reference compression level corresponding to a transmitter-receiver distance closest to a current transmitter-receiver distance. ### Claim 15 A health monitor base station of a wireless ultrasound health monitoring system, comprising: a receiver configured to receive wirelessly a compressed data signal representative of an ultrasound signal obtained by a transducer of a wireless ultrasound transducer configured to be attached to and worn by a patient for wireless monitoring, wherein a data compression level of the compressed data signal is selected from a plurality of data compression levels based on a distance between the wireless ultrasound transducer and the base station; and a processor configured to render synthetic audio representative of the obtained ultrasound signal in lieu of the ultrasound signal in response to a determination that the selected data compression level satisfies a predetermined threshold. ### Claim 16 A method for dynamically adjusting sound data compression level and transmission bandwidth of a wireless ultrasound transducer configured to be portable by a patient for wireless health monitoring, the method comprising: detecting an ultrasound signal using the wireless ultrasound transducer; calculating a distance between the wireless ultrasound transducer and a base station of a wireless health monitoring system based on one or more attributes of a wireless communication channel between the wireless ultrasound transducer and the base station; determining a data compression level for compressing data to be transmitted wirelessly from the wireless ultrasound transducer to the base station, based on the distance between the wireless ultrasound transducer and the base station, wherein the data represents the detected ultrasound signal; compressing the data that represents the detected ultrasound signal based on the determined data compression level to generate a compressed ultrasound data signal; determining, based at least in part on the determined data compression level, the transmission bandwidth for the wireless ultrasound transducer; transmitting the compressed ultrasound data signal from the wireless ultrasound transducer to the base station using the determined transmission bandwidth; and rendering a synthetic audio representative of the detected ultrasound signal in lieu of the detected ultrasound signal by the base station, in response to a determination that a predetermined number of bit errors is detected. ### Claim 17 A wireless ultrasound transducer, which is portable by a patient to be monitored and configured to communicatively couple to a base station of a wireless health monitoring system, the wireless ultrasound transducer comprising: a transmitter; and a processor configured to: calculate a distance between the wireless ultrasound transducer and the base station based on one or more attributes of a wireless communication channel between the transmitter and a receiver of the base station; determine a data compression level for compressing ultrasound data to be transmitted from the wireless ultrasound transducer to the base station based on the distance between the wireless ultrasound transducer and the base station; compress the ultrasound data to be transmitted based on the determined data compression level to generate a compressed ultrasound data signal; dynamically adjust, based at least in part on the determined data compression level, a transmission bandwidth of the wireless ultrasound transducer such that the transmitter transmits wirelessly the compressed ultrasound data signal from the wireless ultrasound transducer to the base station using the adjusted transmission bandwidth; and rendering a synthetic audio representative of a detected ultrasound signal in lieu of the detected ultrasound signal by the base station, in response to a determination by the receiver that a predetermined number of bit errors is detected. ### Claim 18 A health monitor base station of a wireless ultrasound health monitoring system, comprising: a receiver configured to receive wirelessly a compressed data signal representative of an ultrasound signal obtained by a transducer of a wireless ultrasound transducer configured to be attached to and worn by a patient for wireless monitoring, wherein a data compression level of the compressed data signal is selected from a plurality of data compression levels based on a distance between the wireless ultrasound transducer and the base station; and a processor configured to render synthetic audio representative of the obtained ultrasound signal in lieu of the ultrasound signal in response to a determination by the receiver that a predetermined number of bit errors is detected.