WO2023213407A1 - Configuration de forme d'onde multiporteuse à base de chirp - Google Patents

Configuration de forme d'onde multiporteuse à base de chirp Download PDF

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Publication number
WO2023213407A1
WO2023213407A1 PCT/EP2022/062255 EP2022062255W WO2023213407A1 WO 2023213407 A1 WO2023213407 A1 WO 2023213407A1 EP 2022062255 W EP2022062255 W EP 2022062255W WO 2023213407 A1 WO2023213407 A1 WO 2023213407A1
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WO
WIPO (PCT)
Prior art keywords
active
chirps
sensing
configuration
transmitter
Prior art date
Application number
PCT/EP2022/062255
Other languages
English (en)
Inventor
Anastasios KAKKAVAS
Richard Stirling-Gallacher
Qi Wang
Xitao Gong
Mario Hernán Castañeda Garcia
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to PCT/EP2022/062255 priority Critical patent/WO2023213407A1/fr
Publication of WO2023213407A1 publication Critical patent/WO2023213407A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/103—Chirp modulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/343—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using sawtooth modulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/583—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets
    • G01S13/584—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets adapted for simultaneous range and velocity measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/003—Transmission of data between radar, sonar or lidar systems and remote stations
    • G01S7/006—Transmission of data between radar, sonar or lidar systems and remote stations using shared front-end circuitry, e.g. antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9316—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles combined with communication equipment with other vehicles or with base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure

Definitions

  • the present disclosure relates to a multicarrier transmission signal for communication in mobile network.
  • the disclosure is especially concerned with configuring a waveform of the multicarrier transmission signal, wherein the waveform is a chirp-based multicarrier waveform.
  • the disclosure presents a configuration entity for configuring a chirp-based multicarrier transmission signal, a communication device comprising the configuration entity, a configuration method, and a computer program for performing the method.
  • Integrated Sensing and Communication that is, the integration of radar and/or sensing systems with communication systems
  • 6G 6 th generation
  • the synergy between the two kinds of systems is expected to provide benefits to both systems, and to help the systems to overcome their respective limitations.
  • sensing taking into account sensing information can enhance the quality of communication links, for example, by performing sensing-assisted beam management, predicting changes in channel conditions (e.g., line-of-sight (LOS) blockage due to presence of known object in a trajectory of a User Equipment (UE)), and proactive resource allocation.
  • LOS line-of-sight
  • a) Application-level integration The communication system and the radar system are designed separately and use different parts of the spectrum with different hardware, however, they exchange information at the application layer to assist each other.
  • Spectrum-level integration The two systems are distinct, using different hardware and waveforms, but share the available spectrum in a multiplexed way.
  • monostatic ISAC monostatic sensing and communication
  • the main issue in such monostatic ISAC which may use full-duplex operation, i.e., simultaneous transmission and reception, is the treatment of self-interference.
  • the self-interference signal can be many orders of magnitude stronger than, for example, backscattered signals from potential targets, and without a successful radio frequency (RF) cancelling mechanism, it may drive analog-to-digital converters (ADCs) at the sensing Rx side to saturation.
  • RF radio frequency
  • FIG. 1 An example of a monostatic ISAC setup is depicted in FIG. 1.
  • a (communication and sensing) transmitter (Comm. /Sensing Tx) is collocated with a sensing receiver (Sensing Rx) in a first vehicle.
  • the transmitter is able to communicate with a communication receiver located in a second vehicle.
  • the transmitter is further configured to send, for example, radar signals and to sense reflected radar signals, which may be reflected/backscattered from targets like a pedestrian and a cyclist.
  • V2X vehicle-to-everything
  • vehicle UEs aim to communicate with other vehicle UEs, or road side units (RSUs), or gNBs, as well as are able to sense objects in their surrounding environment for collision avoidance, route planning, etc.
  • RSUs road side units
  • gNBs road side units
  • the data symbols may be used as pilot symbols by the sensing Rx which is collocated with the transmitter, and may allow it to sense the environment.
  • Rx road side units
  • One exemplary approach considered is the so-called communication-centric design, where a waveform, which is originally designed for communication purposes, is adapted to efficiently support the radar/ sensing functionality.
  • OFDM orthogonal frequency division multiplexing
  • 3GPP 5 th generation (5G) new radio (NR), in Long-Term Evolution (LTE), and in 802.11 WiFi standards mainly due to its ability to deal with frequency selective channels employing low-complexity receivers.
  • OFDM has been considered also for radar systems, and shows good detection and parameter estimation performance.
  • FIG. 2 A block diagram of an exemplary FMCW setup is shown in FIG. 2 (as presented in ‘Wang, A. Kakkavas, X. Gong, R. A. Stirling-Gallacher, “Towards Integrated Sensing and Communications for 6G”, arXiv 2201.04498, 2022).
  • the FMCW waveform typically consists of a number of consecutive chirps, wherein a chirp is a sinusoidal signal, whose frequency is linearly varied over time.
  • the signal is generated at the transmitter by a FMCW chirp generator and transmitted using a duplexer.
  • the beat signal is generated, which has a frequency proportional to the delay corresponding to the distance between the radar and the target.
  • the beat signal is passed through a low pass filter and an ADC for further signal processing, e.g., target detection or sensing parameter estimation.
  • the main attractive feature of FMCW is its simplified hardware components and low-cost receiver.
  • FMCW has no modulation to convey communications data, which makes it difficult to use FMCW for ISAC applications.
  • the advantages of FMCW are based on the fact that it facilitates the use of low cost sensing receivers for the following reasons: a) The required baseband bandwidth is proportional to the desired maximum range, and can be orders of magnitude smaller than the RF bandwidth that is swept by the chirps. b) It is a natively full-duplex waveform and allows for simpler self-interference cancellation approaches, due to the fact that the useful signal is separated from the self-interference in the frequency domain.
  • the parameter c x determines the slope of the generated chirps, and this parameter and a parameter c 2 can be optimized to improve the performance of the communication link.
  • the resulting simultaneous data transmission on a set of orthogonal chirps can potentially lead to a high data rate communication combined with a low complexity sensing receiver processing.
  • An exemplary approach for IS AC uses an OCDM waveform, but due to the used configuration, i.e., all chirps are activated, the complexity of the sensing receiver is the same as that of an OFDM radar system.
  • This exemplary approach therefore has thus the following disadvantages: a high rate ADC is required and high Tx-Rx isolation is needed at the receiver. Furthermore, advanced analog processing for self-interference cancellation is needed. The reason for this is, that, unlike in an FMCW system, the leakage/self-interference overlaps in frequency with the useful signal (i.e., the signal from the targets that are to be detected).
  • the waveform used in 4 th generation (4G) LTE and 5G communication systems is OFDM, which, as described above, poses significant challenges for the monostatic sensing receiver. These challenges are even more pronounced when the sensing receiver is a UE, which may have limited power budget and processing capabilities.
  • Another exemplary scheme used a chirp-based multicarrier waveform for monostatic ISAC.
  • the transmitted frame is split into two parts, with the first part being used for sensing/radar and the second part being used for data transmission.
  • This exemplary scheme and frame is depicted in FIG. 4.
  • the first part consists of a series of non-overlapping chirps, which enables the sensing receiver to operate in an FMCW-like fashion
  • the second part consists of a series of informationcarrying overlapping chirps.
  • This exemplary scheme can be viewed as a time division multiple access (TDMA) scheme between a radar and a communications waveform.
  • TDMA time division multiple access
  • this exemplary scheme enables low-complexity sensing receiver processing, it has still the following disadvantages: a) It leads to intermittent sensing and communication, as the two operations are not performed simultaneously and continuously over time. For example, if a large portion of the frame is allocated to communication, due to high data load, the sensing receiver can only sense its environment for a limited amount of time. b) More importantly, this TDMA scheme may result in a limited observation time for the sensing, and this in turn results in a worse velocity resolution, since velocity resolution is inversely proportional to the observation time.
  • this disclosure aims to improve integrated communication and sensing.
  • An objective is to provide a configuration for a chirp-based multi-carrier waveform, which enables integrated communication and sensing without the above-described disadvantages.
  • Another objective is to allow for an adaptive configuration of the chirp-based multi-carrier waveform.
  • a further objective is to support different communication rates and different sensing ranges, while using a low complexity receiver.
  • a first aspect of this disclosure provides a configuration entity for configuring a chirp-based multicarrier transmission signal, wherein the configuration entity is configured to: receive a sensing request, the sensing request indicating one or more sensing requirements for performing a sensing measurement by a sensing receiver; obtain capability information indicating one or more capability parameters of a transmitter and a communication receiver, respectively, wherein the transmitter is collocated with the sensing receiver; and determine a set of active chirps for the chirp-based multicarrier transmission signal and a configuration for the set of active chirps, based on the one or more sensing requirements and/or the one or more capability parameters.
  • the configuration entity Taking into account the sensing requirements and capability information for determining the set of active chirps, and the configuration for the set of active chirps, enables the configuration entity to configure the transmission signal for achieving improved integrated communication and sensing.
  • the integrated communication and sensing can be performed with an observation time for the sensing, which is larger than in conventional solutions. This leads to an improved velocity resolution.
  • the chirp-based multicarrier transmission signal allows for low- complexity sensing receiver processing, which is especially beneficial when the monostatic sensing device is a UE.
  • the configuration of the chirp-based multi-carrier waveform can also be adaptive, that is, the configuration can be adapted by the configuration entity, for instance, for a new sensing request or for changed capability parameters.
  • the solution of this disclosure also supports different communication rates and different sensing ranges.
  • a chirp is a sinusoidal signal, whose frequency is linearly varied, for example, increased, over time. However, also a decrease over time is possible.
  • the set of active chirps comprises active chirps, i.e., chirps that are activated and/or used.
  • the active chirps can be selected from a set of available chirps, and some of the available chirps may also be inactive after selecting the active chirps.
  • the configuration entity is further configured to: obtain one or more communication requirements for performing a communication by the transmitter with the communication receiver, wherein the communication is time-correlated with the sensing measurement; and determine the set of active chirps based further on the one or more communication requirements.
  • the time-correlation refers to a time overlap, for instance, being simultaneously. That is, the communication being time-correlated with the sensing measurement may mean that the communication and the sensing measurement are performed simultaneously or overlapping in time. Taking into according the communication requirements further improves the configuration of the set of active chirps and its configuration, and thus the transmission signal.
  • the configuration for the set of active chirps comprises a first parameter, which indicates a slope of the active chirps of the set of active chirps, the slope being defined by a linear frequency variation of each active chirp over time.
  • the frequency variation may be a frequency increase (positive slope for the active chirps) or a frequency decrease (negative slope of the active chirps). Determining at least the first parameter for obtaining the configuration allows the configuration entity to configure a transmission signal adapted to all requirements at hand.
  • the configuration for the set of active chirps further comprises a second parameter, which indicates a matrix to be used by the transmitter to adjust a waveform of the multicarrier signal.
  • Determining the second parameter further improves the configuration of the set of active chirps and its configuration, and thus the chirp-based transmission signal.
  • the configuration for the set of active chirps further includes at least one of: a number of active chirps of the set of active chirps; a subcarrier spacing; a distance in number of subcarriers between at least one active chirp and, respectively, its preceding active chirp and its subsequent active chirp in the set of active chirps: a time offset between at least one active chirp and, respectively, its preceding active chirp and its subsequent active chirp in the set of active chirps; a maximum time delay between at least one active chirp and, respectively, its preceding active chirp and its subsequent active chirp in the set of active chirps.
  • a chirp is a sinusoidal signal, whose frequency is linearly varied overtime.
  • the set of active chirps may comprise a plurality of active chirps, wherein each active chirp may occupy the same frequency bandwidth.
  • a time offset or a time delay between two active chirps may thus be the minimum time difference between the points in time, at which the two active chirps occupy the given frequency. If a maximum time delay is specified by the configuration, it may give a lower limit of this time difference.
  • Any active chirp of the set of chirps may thus have a preceding active chirp and/or a subsequent active chirp (in the time domain).
  • the configuration entity is further configured to change the configuration for the set of active chirps, in particular, to adjust at least one of the first parameter and the second parameter.
  • the configuration of the chirp-based multicarrier transmission signal can be adaptive. For example, different sensing requirements, different capabilities of transmitter and receiver, or different communication requirements may be associated with different optimal chirp-based transmission signals.
  • the sensing request comprises at least one of: an indication of the sensing receiver to perform the sensing measurement; a maximum sensing range requirement; a sensing range resolution and/or accuracy requirement; a maximum sensing velocity requirement; a velocity resolution and/or accuracy requirement.
  • the one or more communication requirements comprise at least one of an identifier of the communication receiver to receive the communication; a data payload to be transmitted to the communication receiver; a latency requirement for the transmission of the data payload.
  • the one or more capability parameters comprise at least one of a bandwidth of the transmitter and/or of the communication receiver; a carrier stepping capability of the transmitter and/or of the communication receiver.
  • the configuration entity is further configured to: obtain environment information related to the transmitter; and determine the set of active chirps and the configuration for the set of active chirps based further on the environment information.
  • Taking into account the environment information further improves the configuration of the chirp-based multicarrier transmission signal.
  • the environment information comprises at least one of: a location of the transmitter; map information about an environment of the transmitter; information about previous sensing measurements performed by the sensing receiver in the environment.
  • the configuration entity is further configured to: obtain channel state information (CSI) of a channel between the transmitter and the communication receiver; and determine the set of active chirps and the configuration for the set of active chirps based further on the CSI. Taking into account the CSI further improves the configuration of the chirp-based multicarrier transmission signal.
  • CSI channel state information
  • the CSI comprises a delay-Doppler profile.
  • the configuration entity is configured to request the CSI from the communication receiver.
  • the configuration entity is configured to receive the sensing request from a network entity, from the transmitter, or from a user equipment, UE.
  • the configuration entity is configured to receive the capability information upon request from the transmitter and/or from the communication receiver.
  • the configuration entity is further configured to: indicate the determined set of active chirps to the transmitter and/or to the communication receiver; and/or indicate the configuration for the set of active chirps to the transmitter and/or to the communication receiver.
  • the transmitter and the communication receiver can determine and correspondingly configure the chirp-based multicarrier transmission signal, based on the set of active chirps and the configuration for the active set of chirps.
  • indicating the set of active chirps may mean indicating information, by which the set of active chirps (or available chirps to be activated) may be identified, for instance, indices of the available chirps that should be active chirps.
  • the indication of the determined set of active chirps is in the form of one of the following: a bitmap of length N, wherein N is a number of available chirps, indicating for each available chirp whether it is activated; a distance between subsequent active chirps in the set of active chirps with a constant uniform spacing between the activate chirps; at least one sensing block, wherein the sensing block comprises an active chirp associated with an index and a number of subsequent and preceding inactive chirps.
  • the indication of the determined set of active chirps and/or the configuration for the set of active chirps is included in at least one of downlink control information and sidelink control information.
  • the configuration entity is collocated with the transmitter and the sensing receiver; or the configuration entity is collocated with the communication receiver.
  • a second aspect of this disclosure provides a communication device for communicating based on a chirp-based multicarrier transmission signal the communication device comprising the configuration entity of the first aspect or any of its implementation forms.
  • the communication device is the transmitter or the communication receiver; and/or the communication device is a UE or a network entity, in particular, a gNB.
  • the communication device of the second aspect provides the same advantages as the configuration entity of the first aspect.
  • a third aspect of this disclosure provides a method for configuring a chirp-based multicarrier transmission signal, wherein the method comprises: receiving a sensing request, the sensing request indicating one or more sensing requirements for performing a sensing measurement by a sensing receiver; obtaining capability information indicating one or more capability parameters of a transmitter and a communication receiver, respectively, wherein the transmitter is collocated with the sensing receiver; and determining a set of active chirps for the chirpbased multicarrier transmission signal and a configuration for the set of active chirps, based on the one or more sensing requirements and the one or more capability parameters.
  • the method of the third aspect may have implementation forms that respectively correspond to the implementation forms of the configuration entity of the first aspect.
  • the method of the third aspect may be performed by the configuration entity of the first aspect.
  • the method of the third aspect and its implementation forms provide the same advantages as described above for the configuration entity of the first aspect and its respective implementation forms.
  • a fourth aspect of this disclosure provides computer program comprising instructions which, when the program is executed by a processor, cause the processor to perform the method of the third aspect and any implementation form thereof.
  • a fifth aspect of this disclosure provides a storage medium storing executable program code which, when executed by a processor, causes the method according to the third aspect or any of implementation form thereof to be performed.
  • this disclosure proposes an adaptive configuration of a chirp-based multicarrier waveform for a transmission signal, in order to enable simultaneous data transmission and low-complexity processing at the sensing receiver in a monostatic setup.
  • the configuring entity of this disclosure is able to take into account the sensing (measurement) request and the capability information, and may further take into account the communication (link) requirements and/or prior information about the transmitter’s environment and the communication channel, respectively.
  • the configuration entity may configure, based on these parameters and requirements, the set of active/activated chirps and the configuration of the set of active chirps, which may comprise the parameters and c 2 for the chirp-based multicarrier waveform. This configuration and the set of active chirps may then be indicated to the transmitter and/or to the communication receiver, for example, depending on the location (of implementation) of the configuration entity.
  • FIG. 1 shows an exemplary integrated monostatic sensing and communication setup.
  • FIG. 2 shows a block diagram of an exemplary FMCW system.
  • FIG. 3 depicts AFDM chirps and a block diagram of an exemplary AFDM transmitter.
  • FIG. 4 shows an exemplary TDMA scheme between a radar- and a communication- oriented configuration of a chirp-based waveform.
  • FIG. 5 shows a configuration entity according to this disclosure.
  • FIG. 6 shows a configuration entity according to this disclosure.
  • FIG. 7 shows a table with a list of parameters.
  • FIG. 8 shows examples of chirps of an AFDM waveform in the time-frequency domain.
  • FIG. 9 shows an example of the adaptation of the time-offset between chirps by adaptation of the parameter c 15 and shows an example of a received signal at the sensing receiver, for the exemplary setup shown in FIG. 1.
  • FIG. 10 shows an exemplary setup and procedure for joint monostatic sensing and communication, when the configuring entity is located at the transmitter.
  • FIG. 11 shows an exemplary setup and procedure for joint monostatic sensing and communication, when the configuring entity is located at the communication receiver.
  • FIG. 12 shows an exemplary setup and procedure for joint monostatic sensing and communication, when the configuring entity is not located at the transmitter and may not have information about the communication link.
  • FIG. 13 shows an exemplary setup and procedure for joint monostatic sensing and communication, when the configuring entity is not located at the transmitter and may have information about the communication link.
  • FIG. 14 shows exemplary options for indicating the set of activate chirps.
  • FIG. 15 shows an exemplary signaling procedure for a mode 1 sidelink joint data transmission and monostatic sensing measurement.
  • FIG. 16 shows an exemplary signaling procedure for a mode 2 sidelink joint data transmission and monostatic sensing measurement, with the configuring entity located at the group leader.
  • FIG. 17 shows an exemplary signaling procedure for a downlink/mode 2 sidelink joint data transmission and monostatic sensing measurement, with the configuring entity located at the transmitter.
  • FIG. 18 shows an exemplary signaling procedure for an uplink joint data transmission and monostatic sensing measurement, with the configuring entity located at the gNB.
  • FIG. 19 shows a communication device according to this disclosure.
  • FGI. 20 shows a configuration method according to this disclosure.
  • FIG. 5 shows a configuration entity 500 according to an embodiment of this disclosure.
  • the configuration entity 500 is adapted to configure a chirp-based multicarrier transmission signal.
  • the configuration entity 500 may be collocated with a (communication) transmitter and with a sensing receiver.
  • the transmitter is collocated with the sensing receiver.
  • the configuration entity 500 may alternatively be collocated with a communication receiver.
  • the configuration entity 500 may be part of a communication device, wherein the communication device may be the transmitter, or may be the communication receiver, and/or wherein the communication device may be a UE, or may be a network entity, for example, a gNB.
  • the configuration entity 500 is configured to receive a sensing request 501, wherein the sensing request 501 indicates one or more sensing requirements for performing a sensing measurement by the sensing receiver.
  • the sensing request 501 may be a sensing request message, which comprises the one or more sensing requirement.
  • the configuration entity 500 may receive the sensing request 501 from a network entity, like a gNB, or from the transmitter, or from a UE.
  • the configuration entity 500 is further configured to obtain capability information 502, which indicates one or more capability parameters of the transmitter and of the communication receiver, respectively.
  • the configuration entity 500 may receive the capability information 502 from the transmitter and/or from the communication receiver. This may occur upon request of the configuration entity 500 for capability information.
  • the configuration entity 500 is further configured to determine a set of active chirps 503 for the chirp-based multicarrier transmission signal, and to determine a configuration 504 for the set of active chirps 503, wherein both are based on at least one of the one or more sensing requirements indicated by the sensing request 501 and the one or more capability parameters indicated by the capability information 502.
  • the configuration 504 for the set of active chirps 503 may comprise one or more parameters that define characteristics of the chirps of the set of active chirps 503.
  • the configuration entity 500 may be further configured to indicate or provide the determined set of active chirps 503 to at least one of the transmitter and the communication receiver. Alternatively or additionally, the configuration entity 500 may be further configured to indicate or provide the configuration 504 for the set of active chirps 503 to at least one of the transmitter and the communication receiver.
  • the configuration entity 500 may comprise a processor or processing circuitry (not shown) configured to perform, conduct or initiate the various operations of the configuration entity 500 described herein.
  • the processing circuitry may comprise hardware and/or the processing circuitry may be controlled by software.
  • the hardware may comprise analog circuitry or digital circuitry, or both analog and digital circuitry.
  • the digital circuitry may comprise components such as application-specific integrated circuits (ASICs), field-programmable arrays (FPGAs), digital signal processors (DSPs), or multi-purpose processors.
  • the configuration entity 500 may further comprise memory circuitry, which stores one or more instruction(s) that can be executed by the processor or by the processing circuitry, in particular under control of the software.
  • the memory circuitry may comprise a non-transitory storage medium storing executable software code which, when executed by the processor or the processing circuitry, causes the various operations of the configuration entity 500 to be performed.
  • the processing circuitry comprises one or more processors and a non-transitory memory connected to the one or more processors.
  • the non-transitory memory may carry executable program code which, when executed by the one or more processors, causes the configuration entity 500 to perform, conduct or initiate the operations or methods described herein.
  • FIG. 6 shows the configuration entity 500 of this disclosure, which builds on FIG. 5 but has additional optional features. Identical elements in FIG. 5 and FIG. 6 share the same reference signs.
  • the communication entity 500 may be located at the transmitter, which may be a UE or a gNB, or may be located at the communication receiver, which may be a UE or a gNB, or may be located at some other network entity.
  • the configuration 504 for the set of active chirps 503 may comprise a first parameter 603, e.g., the parameter which indicates a slope of the active chirps of the set of active chirps 503.
  • the slope is defined by a linear frequency variation of each active chirp of the set of active chirps 503 over time.
  • the configuration 504 for the set of active chirps 503 may further comprise a second parameter 604, e.g., the parameter c 2 which indicates a matrix to be used by the transmitter to adjust a waveform of the multicarrier signal.
  • the parameter may adjust the slope of the active chirps of the set of active chirps 503, and it may influence the distance between the active chirps of the set of active chirps 503, as well impact on the performance of the communication link.
  • the parameter c 2 may not influence the sensing task, but may be related to the communication performance. More specifically, the value of c 2 may be selected such by the configuration entity 500, that a matrix related to the diversity of the communication channel, whose properties depend also on the parameter c 15 becomes full rank.
  • the configuration entity 500 may activate the set of active chirps 503 of the chirp-based multicarrier signal (from a set of available chirps), as well as the parameters and c 2 of the configuration 504, to accommodate the requirement of the sensing request 501, and to enable low-complexity sensing receiver processing, while also allowing for a data transmission to the communication receiver.
  • the configuration entity 500 may, in addition to the sensing requirements and the capability parameters, obtain one or more communication requirements 601 and/or environment information 602 related to the transmitter.
  • the communication requirements 601 may be for performing a communication by the transmitter with the communication receiver.
  • the communication may be time-correlated with the sensing measurement.
  • the configuration entity 500 is then configured to determine the set of active chirps 503 and/or the configuration 504 based further on at least one of the one or more communication requirements 601 and the environment information 602.
  • the operation of the configuring entity 500 is described in more detail, in particular, regarding the inputs that the configuring entity 500 may take into account, and how these inputs may be used by the configuration entity 500 to generate its output, i.e., the set of active chirps 503 and the configuration 504 for the set of active chirps 503 including, for example, the parameters, and c 2 .
  • an exemplary signaling procedure is described, by which the configuring entity 500 may collect the inputs and may indicate them to the transmitter and/or to the communication receiver, so that the transmitter and or the communication receiver may carry out a monostatic ISAC task.
  • the configuring entity 500 receives the sensing request 501 (which may also be referred to as a sensing measurement request).
  • the sensing request 501 may include, among others, one or more of the following: a) Information regarding the sensing receiver, which in the considered monostatic sensing setup is collocated with the transmitter, i.e., may be located at the same device as the transmitter. b) A maximum sensing range requirement R max - c) A sensing range resolution and/or accuracy requirement. d) A velocity resolution and/or accuracy requirement.
  • the configuring entity 500 may also acquire information about the communication task that may performed by the transmitter simultaneously with the sensing measurement, i.e., may acquire the communication requirements 601.
  • the information about the communication requirements 601 may include one or more of the following: a) An indication or identity of the communication receiver. b) A current data payload to be delivered to the communication receiver. c) A latency requirement for the data delivery of the data payload.
  • the configuration entity 500 obtains the capability information 502, which may include information about the baseband bandwidth of the transmitter and the communication receiver.
  • the information about the baseband bandwidth and, for instance, a carrier stepping capability may be used by the configuring entity 500 to determine whether the range resolution requirement can be met using the baseband bandwidth and, if not, whether carrier stepping can be used to attain the required range resolution.
  • the configuring entity 500 may also make use of the environment information 602 regarding the environment of the transmitter, which may include at least one of: a) Map information of the environment of the transmitter. b) One or more previous sensing measurements performed by the transmitter in the environment.
  • the environment information 602 may influence the resulting configuration 504 for the set of active chirps 503. For example, if the configuring entity 500 knows from the map information and/or from the one or more previous sensing measurements that a strong target is at a range larger than R max , the time-offset between any two adjacent activate chirps in the set of active chirps 503 can be set larger than the corresponding delay of this target.
  • the configuring entity 500 may acquire channel state information (CSI) 102 about the communication channel between the transmitter and the communication receiver, wherein the CSI 102 may include a delay-Doppler profile.
  • the delay-Doppler profile may be used by the configuring entity 500 in determining the parameters and c 2 with the aim of extracting multi-path diversity of the communication channel.
  • the configuring entity 500 may configure the set of active chirps 503 and the configuration 504 including the parameters and c 2 using, for example, the following rationale.
  • a chirp may be an active chirp, if a non-zero data or pilot symbol modulates the chirp.
  • the time-offset between any two adjacent activated chirps is referred to as T 0 ⁇ , with T 0 ⁇ > T C .
  • the set of active chirps 503 may be chosen such by the configuration entity 500, that for at least one active chirp the following two conditions hold:
  • n min being the (cyclic) distance in number of subcarriers between an active chirp and its preceding or subsequent active chirp in the set of active chirps 503, and with n min — 1 being the number of chirps between the chirps that are deactivated, the time-offset between an active chirp and its previous and subsequent active chirps is c x ).
  • n min may be set such that T 0 ⁇ > T max .
  • FIG. 8 plots the active chirps 800 of the set of active chirps 503 of an exemplary AFDM waveform in the time-frequency domain, in particular, for the case when all chirps are active chirps 800 (see Fig. 8(a)), and for the case when only a subset of the available chirps is active chirps 800 (FIG. 8(b)), wherein the distance between at least 2 active chirps 800 is set to T O ff. Map information and previous sensing measurements can also influence the choice of the configuring entity 500 for T O ff.
  • the transmitter may also adapt the value of the parameter to adjust the time-offset between the active chirps 800 of the set of active chirps 503, as shown in Fig. 9(a) and FIG. 9(b).
  • the time-offset between the active chirps 800 is inversely proportional to the parameter the time-offset between the chirps 800 is reduced.
  • the goal of the adaptation of the set of active chirps 503 and the configuration 504 including the parameter is, that using active chirps 800, the subsequent active chirp 800 of each having a time-offset T 0/ .y, the sensing receiver can operate in an FMCW-like fashion, i.e., it may employ ADC with a reduced rate and combat self-interference with a simpler processing scheme.
  • FIG. 9(c) shows the received signal at the sensing receiver for the exemplary scenario shown in FIG. 1.
  • the dotted and dashed lines correspond to the backscattered signals from the two targets shown in FIG. 1, i.e., the cyclist and the pedestrian.
  • the black lines correspond to the self-interference, whose delay is very short.
  • the delayed versions of the active chirps 800 arrive before the subsequent active chirp 800 is transmitted. The result is that at each time instant the signal from the targets is at a different frequency from the self-interference. Consequently, a low complexity receiver may be employed, and a range profile can be created from each chirp with a time-offset T 0 ⁇ from its subsequent one. Furthermore, if multiple AFDM symbols are transmitted, a range- Doppler profile from each of these chirps 800 can be generated.
  • the choice of the set of active chirps 503 may balance a sensing and communication performance trade-off.
  • the sensing performance may be improved, but the data rate may be reduced.
  • the parameter affects both T 0 ⁇ and the communication performance.
  • the value of c x may in turn influence the choice of the parameter c 2 , which may be optimized to improve data transmission. Therefore, an adaptation of may result in an adaptation of c 2 .
  • the value of c 2 may be chosen such that a matrix related to the diversity of the communication channel, whose properties depend also on c 15 becomes full rank.
  • the configuring entity 500 may consider the requirements of the sensing request 501 for the sensing receiver and the requirements of the data transmission from the transmitter to the communication receiver - including a current data payload and one or more latency requirements - to choose appropriate values for the parameters of the configuration 504. This adaptation may be performed dynamically given the current sensing request 501 and the current communication load.
  • signaling suitable for the configuring entity 500 to obtain its inputs and to indicate the configuration 504 and the set of active chirps 503 to other entities involved in the monostatic ISAC task.
  • a number of cases can be identified depending on the location of the configuring entity 500 and its prior knowledge about the communication task.
  • the configuration entity 500 is located at the transmitter 110, as shown in FIG. 10.
  • the procedure for joint monostatic sensing and data transmission is now described for this example.
  • the transmitter 110 may be a gNB, which has downlink data payload, or may be a UE, which has sidelink data payload, to deliver to a communication receiver 100 (e.g., a data receiving UE).
  • a communication receiver 100 e.g., a data receiving UE.
  • the setup and the steps of the procedure are depicted in Fig. 10.
  • the configuration entity 500 receives a sensing measurement request 501.
  • the sensing request 501 may come from a higher layer at the transmitter 110, from the network, or from another UE, and it may include, among others: a) A maximum sensing range requirement R max - b) A range resolution and/or accuracy requirement. c) A velocity resolution and/or accuracy requirement.
  • the configuration entity 500 may then request that the communication receiver 100 reports its capability information 502, e.g., its baseband bandwidth and optionally its carrier stepping capability, if this information is not already known, to the configuration entity 500.
  • the configuration entity 500 may also request 103 a CSI report, wherein the CSI 102 may include a delay-Doppler profile, from the communication receiver 100 to the configuration entity 500, if this information is not already known.
  • Step 3 The communication receiver 100 provides the requested report with the CSI 102 and the capability information 502.
  • Step 4 Taking into account the received report from the communication receiver 100, the requirements of the sensing request 501, and optionally the data payload 104, and potentially environment information 602 including available map information and previous sensing measurements, the configuration entity 500 determines the set of active chirps 503 and the configuration 504 including, for example, the parameters and c 2 . Step 5. After determining the configuration 504 and parameters for the set of active chirps 503, the configuration entity 500 indicates 101 the set of active chirps 503 and/or its configuration 504 to the communication receiver 100.
  • Step 6 The transmitter 110 transmits the data and simultaneously performs the sensing measurement (with the sensing receive collocated with the transmitter 110).
  • Step 7 The transmitter 110 sends the sensing measurement report to the entity that requested the sensing measurement.
  • the configuration entity 500 is located at the communication receiver 100, as shown in FIG. 11.
  • the communication receiver 100 has information about the communication link requirements 601. Steps for this example are outlined as follows:
  • Step 1 The configuration entity 500 receives a sensing measurement request 501.
  • Step 2 Since the configuration entity 500 is not collocated with the transmitter 110, it may request 103 the transmitter 110 for a report of its capabilities 502, including its baseband bandwidth and (optionally) carrier stepping capability, if not already available. In addition, it may optionally request the transmitter 110 to provide environment information 602, like map information and/or previous sensing measurements in the environment.
  • Step 3 The transmitter 110 provides the requested report.
  • Step 4 The configuration entity 500 determines the set of active chirps 503 and the configuration 504 including, for example, the parameters and c 2 .
  • the configuration entity 500 indicates 101 the set of active chirps 503 and/or its configuration 504to the transmitter 110.
  • the configuration entity 500 may also indicate it to the transmitter 110 the entity that requested the measurement report.
  • Step 6 The transmitter 110 transmits the data and simultaneously performs the sensing measurement.
  • Step 7 The transmitter 110 sends the measurement report to the entity that requested the measurement report. Alternatively, it can send the measurement report to the configuration entity 500, which can then forward it to the entity that requested it.
  • the configuration entity 500 is not located at the transmitter 110 or at the communication receiver 100, and may not have information about the communication link between the transmitter 110 and the communication receiver 100.
  • the configuration entity 500 may be located at the network, e.g. at the gNB or at a location server. Steps for this example are outlined below:
  • Step 1 The configuration entity 500 receives a sensing measurement request 501.
  • Step 2 Since the configuration entity 500 is not collocated with the transmitter 110, it may request 103 the transmitter 110 for a report of its capability information 502, including baseband bandwidth and (optionally) carrier stepping capability. In addition, it may optionally request the transmitter to provide environment information 602, like map information and/or previous sensing measurements of/in the environment. It may also request communication link information/requirements 601, including the communication receiver’s identity, the data payload 104, and a required latency, if not already known.
  • Step 3 The transmitter 110 provides the requested report.
  • Step 4 The configuration entity 500 may request 103 a report from the communication receiver 100 of its capabilities information 502, including baseband bandwidth and (optionally) carrier stepping capability. In addition, it may optionally request 103 a CSI report 102, which may include a delay-Doppler profile, from the communication receiver 100 to the configuration entity 500.
  • Step 5 The communication receiver 100 provides the requested report(s).
  • the configuration entity 500 configures the set of active chirps 503 and the configuration 504 with, for instance, the parameters and c 2 .
  • Step 7. The configuration entity 500 indicates 101 the set of active chirps 503 and/or its configuration 504 to the transmitter 110 and the communication receiver 100. Alternatively, the configuration entity 500 may indicate 101 the set of active chirps 503 and/or its configuration 504to the transmitter 110, and the transmitter 110 may indicate it further to the communication receiver 100. The configuration entity 500 may also indicate to the transmitter 110 the entity that requested the measurement report.
  • Step 8 The transmitter 110 transmits the data and simultaneously performs the sensing measurement.
  • Step 9 The transmitter 110 sends the measurement report to the entity that requested the measurement report. Alternatively, it can send the measurement report to the configuration entity 500, which can then forward it to the entity that requested it.
  • the configuration entity 500 is not located at the transmitter 110 or the communication receiver 100, and may have information about the communication link between the transmitter 110 and the communication receiver 100.
  • the configuration entity 500 may be located at the network, e.g. at the gNB or at the location server. Steps for this case are outlined below:
  • Step 1 The configuration entity 500 receives a sensing measurement request 501.
  • Step 2 Since the configuration entity 500 is not collocated with the transmitter 110, it may request 103 the transmitter 110 for a report of its capability information 502, including baseband bandwidth and (optionally) carrier stepping capability, if not already available. Optionally, it may also request the transmitter 110 to provide environment information 602 like map information and/or previous sensing measurements. Since in this case the configuration entity 500 has the information about the communication link, including the communication receiver 100, data payload 104 and latency, it does not need to request it from the transmitter 110. It may also request 103 a report from the communication receiver 100 of its capability information 502, including baseband bandwidth and (optionally) carrier stepping capability. Optionally, it may also request 103 the communication receiver 100 to provide a CSI report, which may include a CSI 102 with a delay-Doppler profile. Step 3 : The transmitter 110 and the communication receiver 100 provide their requested reports.
  • Steps 4 to 7 are the same as steps 6 to 9 described the previous example.
  • the solutions of this disclosure enable continuous joint communication and monostatic sensing. Since every symbol can potentially be used for sensing, the observation time for sensing using the proposed solution is larger, resulting in an improved velocity resolution. In addition, the resulting signal structure allows for low-complexity sensing receiver processing, which is important especially when the monostatic sensing device is a UE.
  • the format of the indication 101 of the set of active chirps 503 and/or its configuration 504 is described, and then a detailed description of the signaling procedure for a joint data transmission and sensing measurement in the sidelink, downlink and uplink of a communication system is provided.
  • the parameters and c 2 may be real numbers and may be indicated 101 with a bit word of appropriate length for each of the parameters.
  • the indication 101 of the set of active chirps 503 may take one of the following forms, which are depicted in FIG. 14(a), FIG. 14(b) and FIG. 14(c): a) A bitmap 141 of length N, where N is the number of available chirps, indicating their activation. b) A distance 142 between adjacent active chirps 800, assuming constant uniform spacing between active chirps 800. c) At least one sensing block 143.
  • a sensing block 143 is indicated by a tuple of integers (n s , n b '), where the sensing block 143 consists of an active chirp 800 with index n s and a number n b — 1 of following and preceding deactivated chirps, with n b > n min for a given maximum range. The rest of the chirps not belonging to a sensing block are activated.
  • the set of active chirps 503 may be different for each symbol, or slot, or subframe, or frame, or even sub-symbol when carrier stepping or frequency hopping is used.
  • the proposed indication 101 may act on top of existing resource allocations, to determine which of the allocated resource elements (in this case available chirps) may be activated to enable joint data transmission and monostatic sensing.
  • the proposed configuration 504 may change due to, e.g., a new sensing measurement request 501, while the existing resource allocation as described above may be fixed.
  • an adaptation of the set of active chirps 503 may be accompanied by an adaptation of the configuration 504, for instance, the parameters (and subsequently c 2 ), so as to create the appropriate time-offset between adjacent chirps 800.
  • the whole new configuration 504 may be signaled to the communication receiver 100.
  • FIG. 15 shows an example of a signaling procedure for sidelink mode 1 with the configuration entity 500 located at a gNB 150.
  • Multiple UEs 151 are involved in the procedure.
  • UE A is the transmitter 110 and sensing receiver (collocated)
  • UE B is the communication receiver 100
  • the gNB 150 configures the communication link.
  • the configuration entity 500 is thus at the gNB serving UE A. If the serving gNB of UE B is different than that of UE A, the described signaling from the gNB to UE B may go through the network and the serving gNB of UE B.
  • the gNB 150 receives a sensing request 501 for a sensing measurement from UE A, requested from some other network entity, for example another UE 151 (UE C) in the sidelink group, to which UE A and UE B belong.
  • the sensing request 501 could come from a higher layer at the gNB 150.
  • the signaling procedure corresponds to the signaling procedure described above for the example, in which the configuration entity 500 is not located at the transmitter 110 and has information about the communication link requirements 601 (FIG. 12).
  • the gNB 150 may request UE A to report 103 its capability information 502, including baseband bandwidth and carrier stepping capability. As the gNB configures the communication link, it may already know the UE capabilities 502. Also, as the gNB configures the communication link, it has the required information about it, namely the communication receiver 100, data payload 104, and latency, and does not need to request it from UE A. The gNB may also request the transmitter 110 to report information 602 about its environment, including map information and previous sensing measurements of the environment, if available.
  • the gNB issues a request 103 to the communication receiver 100 to report its capability information 502, including baseband bandwidth and carrier stepping capability, and CSI 102 including a delay -Doppler profile, if available.
  • the gNB takes into account the sensing measurement requirements of the sensing request 501, the communication link requirements 601, the information 602 about the environment of the transmitter 110 and the CSI 102 of the communication channel and determines the set of active chirps 503 and the configuration 504. These may then be indicated 101 to UE A and UE B by the gNB through the use of appropriate fields in the downlink control information (DCI).
  • DCI downlink control information
  • the gNB may indicate 101 the configuration 504 and/or set of active chirps 503 to UE A through appropriate fields in the DCI and UE A may indicate the configured parameters to UE B through appropriate fields in the sidelink control information (SCI).
  • the gNB may also signal to UE A that it should provide the sensing measurement report to UE C.
  • UE A transmits the data signal and simultaneously performs the sensing measurement.
  • UE B can demodulate the signal and decode the transmitted data.
  • the UE A reports the sensing measurement either directly to UE C or to the configuring entity 500, which forwards the measurement to UE C.
  • FIG. 16 shows an example of a signaling procedure for sidelink mode 2 with the configuration entity 500 at the group leader 160.
  • a group of UEs 151 is considered, where UE A is the transmitter 110 and sensing receiver, UE B is the communication receiver 100.
  • the configuration entity 500 is at some other network entity, which could be another UE, e.g., the group leader 160 as shown, but could also be a gNB or some other network entity in the radio access network (RAN) or the core network.
  • the entity where the configuration entity 500 resides, here referred to as the group leader 160 could be any of the aforementioned entities, and does not have information about the communication link.
  • the group leader 160 receives a sensing request 501 for a sensing measurement from UE A, requested from some other network entity, for example another UE (e.g. UE C) in the group.
  • the sensing request 501 could come from a higher layer at the group leader 160.
  • the signaling procedure corresponds to the signaling procedure described above for the example, in which the configuration entity 500 is not located at the transmitter 110 and does not have information about the communication link requirements 601 (FIG. 13).
  • the group leader 160 may request UE A to report 103 its capability information 502, including baseband bandwidth and carrier stepping capability. Also, it may request UE A to report information about the communication link, namely the communication receiver 100, data payload 104, and latency. Additionally, the group leader 160 may also request the transmitter 110 to report environment information 602 about its environment, including map information and previous sensing measurements, if available. UE A provides the requested report. Then, the group leader 160 can issue a request 103 to the communication receiver 100 to report its capability information 502, including baseband bandwidth and carrier stepping capability, and CSI 102 including delay-Doppler profile, if available.
  • the group leader 160 After receiving the requested report from the communication receiver 100, the group leader 160 takes into account the sensing measurement requirements in the sensing request 501, the communication link requirements 601, the environment information 602 about the environment of the transmitter 110 and the CSI 102 of the communication channel and determines the set of active chirps 503 and the configuration 504. These may be indicated 101 to UE A and UE B by the gNB through the use of appropriate fields in the DCI. Alternatively, the gNB may indicate 101 the set of active chirps 503 and/or configuration 504 to UE A through appropriate fields in the DCI and UE A may forward it to UE B through appropriate fields in the SCI. The gNB may also signal to UE A that it should provide the sensing measurement report to UE C.
  • UE A transmits the data signal and simultaneously performs the sensing measurement.
  • UE B can demodulate the signal and decode the transmitted data.
  • UE A reports the sensing measurement either directly to UE C or to the configuring entity, which forwards the measurement to UE C.
  • FIG. 17 shows an example of a signaling procedure for downlink/sidelink mode 2 with the configuration entity 500 at the transmitter 110.
  • the transmitter 110 and sensing receiver is the gNB and in the sidelink it is UE A.
  • UE B is the communication receiver 100.
  • the two examples invoke the same signaling procedure, in the following the signaling procedure for the downlink is described, with the note that it is also applicable to the sidelink mode 2, by replacing the gNB with UE A.
  • the configuration entity 500 is at the gNB.
  • the gNB receives a sensing request 501 for a sensing measurement, requested from itself (from a higher layer) or some other network entity.
  • the signaling corresponds to the signaling procedure described above for the example, in which the configuration entity 500 is located at the transmitter 110 (FIG. 10).
  • the gNB can issue a request to UE B to report 103 its capability information 502, including baseband bandwidth and carrier stepping, if not already known, and CSI 102 including delay- Doppler profile, if available.
  • the gNB takes into account the sensing measurement requirements in the sensing request 501, the communication link requirements 601, the information 602 about its environment (map information and previous sensing measurements) and the CSI 102 of the communication channel and determines the set of active chirps 503 and the configuration 504. These may be indicated 101 to UE B by the gNB through the use of appropriate fields in the DCI.
  • the configuration 504 and chirp set 503 may be indicated to UE B by UE A through the use of appropriate fields in the SCI.
  • the gNB transmits the data signal and simultaneously performs the sensing measurement. Finally, the gNB reports the sensing measurement to the entity that requested the measurement.
  • FIG. 18 shows an example of a signaling procedure for an uplink scenario, in which the UE 151 is the transmitter 110 and the gNB 150 is the communication receiver 100.
  • the configuration entity 500 is at the gNB 150.
  • the signaling procedure corresponds to the signaling procedure described above for the example, where the configuration entity 500 is located at the communication receiver 100 (FIG. 11).
  • the gNB receives a sensing measurement request 501. Then, the gNB requests 103 the UE to report 103 its capability information 502, including baseband bandwidth and carrier stepping capability, if not already known to the gNB, as well as environment information 602 including map information and previous sensing measurements, if available. After receiving the requested report from the UE, the gNB takes into account the sensing measurement requirements in the sensing request 501, the communication link requirements 601, the information 602 about the UE’s environment (map information and previous sensing measurements) and its CSI 102 of the communication channel, if available and configures the set of active chirps 503 and the configuration 504. It may indicate 101 these to the UE through the use of appropriate fields in the DCI. The UE transmits the data and the gNB can then demodulate the signal and decode the transmitted data. The UE can receive the backscattered signal from targets in its environment and perform sensing measurement, which it can then report to the source of the sensing measurement request.
  • FIG. 19 shows a communication device 190 according to this disclosure.
  • the communication device 190 is configured to communicate based on a chirp-based multicarrier transmission signal.
  • the communication device 190 may be the transmitter 110 or the communication receiver 100, as described above.
  • the communication device 190 may, for example, be a UE 151 or a network entity 150, in particular, may be a gNB, as described above.
  • the communication device 190 comprising the configuration entity 500 as described above, which is able to determine the set of active chirps 503 for the chirp-based multicarrier transmission signal and the configuration 504 for the set of active chirps 503, for instance the parameters and c 2 , based on the one or more sensing requirements of the sensing request 501 and/or based on the one or more capability parameters of the capability information 502.
  • FIG. 20 shows a method 200 according to this disclosure.
  • the method 200 may be performed by the configuration entity 500 of this disclosure, as described above.
  • the method 200 can be used for configuring a chirp-based multicarrier transmission signal as described for all the above scenarios.
  • the method 200 comprises a step 201 of receiving a sensing request 501, the sensing request 501 indicating one or more sensing requirements for performing a sensing measurement by a sensing receiver.
  • the method 200 further comprises a step 202 of obtaining capability information 502 indicating one or more capability parameters of a transmitter 110 and a communication receiver 100, respectively, wherein the transmitter 110 is collocated with the sensing receiver.
  • the method 200 further comprises a step 203 of determining a set of active chirps 503 for the chirp-based multicarrier transmission signal and a configuration 504 for the set of active chirps 503, based on the one or more sensing requirements in the sensing request 501 and based on the one or more capability parameters of the capability information 502.

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Abstract

La présente invention concerne un signal de transmission multiporteuse pour la communication dans un réseau mobile. L'invention concerne en particulier la configuration d'une forme d'onde multiporteuse à base de chirp du signal de transmission multiporteuse. À cette fin, une entité de configuration est prévue, qui est configurée pour recevoir une demande de détection indiquant une ou plusieurs exigences de détection pour effectuer une mesure de détection par un récepteur de détection, et pour obtenir des informations de capacité indiquant un ou plusieurs paramètres de capacité d'un émetteur et d'un récepteur de communication, qui sont colocalisés. L'entité de configuration est en outre configurée pour déterminer un ensemble de chirps actifs pour le signal de transmission multiporteuse basé sur le chirp et une configuration pour l'ensemble de chirps actifs, sur la base d'une ou plusieurs exigences de détection et/ou d'un ou plusieurs paramètres de capacité.
PCT/EP2022/062255 2022-05-06 2022-05-06 Configuration de forme d'onde multiporteuse à base de chirp WO2023213407A1 (fr)

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Citations (3)

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Publication number Priority date Publication date Assignee Title
US20190293748A1 (en) * 2018-03-26 2019-09-26 Qualcomm Incorporated Using a side-communication channel for exchanging radar information to improve multi-radar coexistence
US11125854B2 (en) * 2019-03-26 2021-09-21 The Boeing Company Time transfer and position determination during simultaneous radar and communications operation
WO2022198349A1 (fr) * 2021-03-20 2022-09-29 Huawei Technologies Co., Ltd. Procédé, appareil et support pour la modulation de forme d'onde dans le domaine fractionnaire pour une détection et une communication intégrées

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190293748A1 (en) * 2018-03-26 2019-09-26 Qualcomm Incorporated Using a side-communication channel for exchanging radar information to improve multi-radar coexistence
US11125854B2 (en) * 2019-03-26 2021-09-21 The Boeing Company Time transfer and position determination during simultaneous radar and communications operation
WO2022198349A1 (fr) * 2021-03-20 2022-09-29 Huawei Technologies Co., Ltd. Procédé, appareil et support pour la modulation de forme d'onde dans le domaine fractionnaire pour une détection et une communication intégrées

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