WO2024140753A1 - Procédé et appareil d'estimation d'erreur de synchronisation, et dispositif et support de stockage lisible - Google Patents

Procédé et appareil d'estimation d'erreur de synchronisation, et dispositif et support de stockage lisible Download PDF

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Publication number
WO2024140753A1
WO2024140753A1 PCT/CN2023/142169 CN2023142169W WO2024140753A1 WO 2024140753 A1 WO2024140753 A1 WO 2024140753A1 CN 2023142169 W CN2023142169 W CN 2023142169W WO 2024140753 A1 WO2024140753 A1 WO 2024140753A1
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WIPO (PCT)
Prior art keywords
signal
time
synchronization error
information
sending
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PCT/CN2023/142169
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English (en)
Chinese (zh)
Inventor
黄伟
Original Assignee
维沃移动通信有限公司
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Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Publication of WO2024140753A1 publication Critical patent/WO2024140753A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the embodiments of the present application provide a synchronization error estimation method, apparatus, device and readable storage medium, which can solve the problem of how to accurately estimate the synchronization errors of different devices.
  • a synchronization error estimation device which is applied to a first device and includes:
  • FIG1A is a block diagram of a single-base backscatter communication system applicable to an embodiment of the present application
  • first, second, etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by “first” and “second” are generally of the same type, and the number of objects is not limited.
  • the first object can be one or more.
  • “and/or” in the specification and claims represents at least one of the connected objects, and the character “/" generally represents that the objects associated with each other are in an "or” relationship.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency Division Multiple Access
  • wireless optical systems backscatter communication systems, RFID systems, extremely low power consumption Internet of Things systems, communication energy integrated transmission systems, etc.
  • system and “network” in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies, as well as other systems and radio technologies, such as New Radio (NR) systems, or 6th Generation (6G) communication systems, etc.
  • NR New Radio
  • 6G 6th Generation
  • Backscatter Communication refers to the use of radio frequency signals from other devices or the environment to modulate signals to transmit information. It is a typical passive IoT device.
  • the basic components and main functions of the backscatter communication transmitter include:
  • -Microcontroller including control of baseband signal processing, energy storage or data scheduling status, switch switching, system synchronization, etc.
  • -Signal receiving module used to demodulate control commands or data sent by the backscatter communication receiving end or other network nodes.
  • the basic building blocks and main functions of the backscatter communication receiver i.e., the reader, include:
  • -Antenna unit used to receive the modulated backscattered signal.
  • Backscatter signal detection module used to detect the backscatter signal sent by the backscatter communication transmitter, including but not limited to amplitude shift keying (ASK) detection, phase shift keying (PSK) detection, frequency shift keying (FSK) detection or quadrature amplitude modulation (QAM) detection, etc.
  • ASK amplitude shift keying
  • PSK phase shift keying
  • FSK frequency shift keying
  • QAM quadrature amplitude modulation
  • -Demodulation and decoding module demodulates and decodes the detected signal to restore the original information stream.
  • the backscatter communication device can be a tag in the traditional radio frequency identification (RFID) or a passive or semi-passive Internet of Things (IoT). For convenience, it is collectively referred to as BSC equipment here.
  • RFID radio frequency identification
  • IoT Internet of Things
  • the solution in this application can be applied to both relative positioning and absolute positioning scenarios. Since low-cost, low-power tags can be widely deployed, the solution in this application can facilitate the estimation of synchronization errors between different devices.
  • Step 22 The first device determines a synchronization error between the second device and the third device according to the first time information and the second time information.
  • the first time information is related to the sending time and receiving time of the first signal and the sending time and receiving time of the second signal
  • the second time information is related to the sending time and receiving time of the third signal and the sending time and receiving time of the fourth signal.
  • the first signal is a signal sent by the second device to the fourth device
  • the second signal is a signal sent by the fourth device to the second device
  • the third signal is a signal sent by the third device to the fourth device
  • the fourth signal is a signal sent by the fourth device to the third device
  • the fourth device is used to calibrate the synchronization error
  • the synchronization error between the second device and the third device is specifically: the time error between the second device and the third device relative to the same reference device.
  • the receiving time of the first signal can be understood as the arrival time of the first signal
  • the receiving time of the second signal can be understood as the arrival time of the second signal
  • the receiving time of the third signal can be understood as the arrival time of the third signal
  • the receiving time of the fourth signal can be understood as the arrival time of the fourth signal.
  • the first device can be any of the following: a second device, a third device, a fourth device (i.e., a reference device) and a third-party device, and the third-party device is a device different from the second device, the third device and the fourth device.
  • the first device is a positioning server such as a location management function (LMF), the second device is a base station, the third device is a base station, and the fourth device is a positioning tag, a backscatter communication device, a passive Internet of Things device or a terminal device, etc.; or, the first device is a positioning server such as LMF, the second device is a base station, the third device is a terminal device, and the fourth device is a positioning tag, a backscatter communication device, a passive Internet of Things device or a terminal device, etc.; or, the first device is a positioning server such as LMF, the second device is a terminal device, the third device is a terminal device, and the fourth device is a positioning tag, a backscatter communication device, a passive Internet of Things device or a terminal device, etc.; or, the first device is a positioning server such as LMF, the second device is a terminal device, the third device is a terminal device, and the fourth device is a positioning tag, a back
  • the synchronization error between different devices can be estimated based on the reference device, thereby accurately estimating the synchronization error between different devices, so that different devices can perform error compensation based on the estimated synchronization error, thereby improving positioning accuracy and communication performance.
  • the acquiring of the first time information and the second time information may include at least one of the following:
  • the first device receives at least one of the following sent by the second device: a sending time of the first signal, a receiving time of the second signal, and a time difference between a receiving time of the second signal and a sending time of the first signal.
  • the second device sends time information to the first device in any of the following ways: 1) sending the sending time of the first signal and the receiving time of the second signal respectively; 2) sending the time difference between the receiving time of the second signal and the sending time of the first signal.
  • the first device receives at least one of the following sent by the third device: a sending time of the third signal, a receiving time of the fourth signal, and a time difference between a receiving time of the fourth signal and a sending time of the third signal.
  • the first device receives at least one of the following items sent by the fourth device: the reception time of the first signal, the sending time of the second signal, the reception time of the third signal, the sending time of the fourth signal, the time difference between the sending time of the second signal and the reception time of the first signal, and the time difference between the sending time of the fourth signal and the reception time of the third signal.
  • the first device can directly measure the reception time of the first signal, the transmission time of the second signal, the reception time of the third signal, the transmission time of the fourth signal, the time difference between the transmission time of the second signal and the reception time of the first signal, and/or the time difference between the transmission time of the fourth signal and the reception time of the third signal, without the need for the fourth device to report. If the first device is a third-party device, it receives the time information sent/reported by the second device, the third device, and the fourth device.
  • the first time information and/or the second time information may be sent to the first device via but not limited to at least one of the following:
  • LPP LTE Positioning Protocol
  • the first device is a positioning server such as LMF
  • the second device, the third device and the fourth device are terminals UE, then: the second device, the third device and the fourth device can send the first time information/the second time information to the first device through LPP signaling;
  • NR positioning protocol A (NRPPa) signaling
  • the first device is a positioning server such as LMF
  • the second device, the third device and the fourth device are base stations.
  • the second device, the third device and the fourth device may send the first time information/the second time information to the first device through NRPPa signaling;
  • the first device is a base station
  • the second device, the third device and the fourth device are UEs
  • the second device, the third device and the fourth device can send the first time information/the second time information to the first device through signaling based on the Uu interface
  • the signaling based on the Uu interface includes but is not limited to non-access stratum (Non-Access Stratum, NAS), radio resource control (Radio Resource Control, RRC) signaling, medium access control control element (Medium Access Control Control Element, MAC-CE), downlink control information (Downlink Control Information, DCI), etc.
  • PC5-RRC signaling PC5-S signaling
  • MAC-CE media access control information
  • SCI sidelink control information
  • the first device sends a first signal to the fourth device at time T1 , that is, the sending time of the first signal is T1
  • the fourth device receives the first signal and records the time T2 of receiving the first signal, that is, the receiving time of the first signal is T2
  • the fourth device sends a second signal at time T3 , that is, the sending time of the second signal is T3
  • the second device receives the second signal and records the time T4 of receiving the second signal, that is, the receiving time of the second signal is T4
  • the third device sends a third signal to the reference device at time T5 , that is, the sending time of the third signal is T5
  • the fourth device receives the third signal and records the time T6 of receiving the third signal, that is, the receiving time of the third signal is T6
  • the fourth device sends a fourth signal at time T7 , that is,
  • the synchronization error ⁇ t between the second device and the third device can be obtained as:
  • the signal parameters of the first signal and the second signal may be completely different or partially the same.
  • the signal parameters of the third signal and the fourth signal may be completely different or partially the same.
  • the signal parameters of the first signal/the second signal and the third signal/the fourth signal may be completely different or partially the same.
  • the signal parameters of at least one of the first signal, the second signal, the third signal and the fourth signal may include, but are not limited to, at least one of the following:
  • the modulation mode may be, for example, PAM modulation, QAM modulation, APSK modulation, PPM modulation, PIM modulation, etc.;
  • the signal waveform may be, for example, a constant envelope waveform, an orthogonal frequency division multiplexing (OFDM) waveform, an orthogonal time frequency space (OTFS) waveform, etc.;
  • OFDM orthogonal frequency division multiplexing
  • OTFS orthogonal time frequency space
  • Sequence type may be, for example, a pseudo-noise PN sequence, a ZC (Zadoff-Chu) sequence, an m sequence, a Gold sequence, etc.;
  • the first device may configure/indicate the signal parameters of each signal of the second device, the third device, and the fourth device.
  • the estimation method in this embodiment may also include at least one of the following:
  • the first device sends second information to the third device, where the second information is used to configure or indicate a signal parameter of at least one of the following: a third signal and a fourth signal;
  • the first device configures or indicates the synchronization error ⁇ t between the second device and the third device to the second device, and configures or indicates the synchronization error to the third device through the second device; for example, the first device first configures or indicates the synchronization error ⁇ t to the second device, and then the second device configures or indicates the synchronization error ⁇ t to the third device;
  • the first device configures or indicates the synchronization error ⁇ t between the second device and the third device to the second device and/or the third device, that is, the first device directly configures or indicates the synchronization error ⁇ t to the second device and/or the third device.
  • the second device and/or the third device may perform error compensation based on the synchronization error ⁇ t, thereby improving positioning accuracy and communication performance.
  • the first device and the second device are the same device, the second device is a base station, the third device is a base station, and the fourth device (i.e., the reference device) can be a positioning tag, a backscatter communication device, a passive Internet of Things device, or a terminal device, etc.
  • the fourth device i.e., the reference device
  • the first device i.e., the second device
  • the third device is a base station
  • the fourth device can be a positioning tag, a backscatter communication device, a passive Internet of Things device, or a terminal device, etc.
  • This solution is applicable to the scenario where the synchronization error between base stations is estimated based on the reference device, and the first device (i.e., the second device) interacts with the third device through Xn signaling.
  • the reference device generates a second signal and/or a fourth signal based on the backscattered signal
  • the synchronization error is configured or indicated to the second device and/or the third device.
  • the sixth signal is a radio frequency carrier signal received by the fourth device.
  • the second information is used to configure or indicate a signal parameter of at least one of the following: the third signal and the fourth signal;
  • the third information is used to configure or indicate a signal parameter of at least one of the following: Number: the first signal, the second signal, the third signal, and the fourth signal.
  • the synchronization error estimation device 100 provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in Figure 2 and achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • an embodiment of the present application also provides a device 110, including a processor 111 and a memory 112, and the memory 112 stores a program or instruction that can be executed on the processor 111.
  • the program or instruction is executed by the processor 111, the various steps of the above-mentioned synchronization error estimation method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the technical solution of the present application can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.
  • a storage medium such as ROM/RAM, a magnetic disk, or an optical disk
  • a terminal which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

La présente demande appartient au domaine technique des communications. Sont divulgués un procédé et un appareil d'estimation pour une erreur de synchronisation, ainsi qu'un dispositif et un support de stockage lisible. Le procédé d'estimation pour une erreur de synchronisation comprend les étapes suivantes : un premier dispositif acquiert des premières informations temporelles et des secondes informations temporelles, les premières informations temporelles étant associées à une heure d'envoi et à une heure de réception d'un premier signal et à une heure d'envoi et à une heure de réception d'un deuxième signal, les secondes informations temporelles étant associées à une heure d'envoi et à une heure de réception d'un troisième signal et à une heure d'envoi et une heure de réception d'un quatrième signal, le premier signal étant un signal envoyé par un deuxième dispositif à un quatrième dispositif, le deuxième signal étant un signal envoyé par le quatrième dispositif au deuxième dispositif, le troisième signal étant un signal envoyé par un troisième dispositif au quatrième dispositif, le quatrième signal étant un signal envoyé par le quatrième dispositif au troisième dispositif, et le quatrième dispositif étant un dispositif de référence permettant d'étalonner une erreur de synchronisation ; et déterminer une erreur de synchronisation entre le deuxième dispositif et le troisième dispositif en fonction des premières informations temporelles et des secondes informations temporelles.
PCT/CN2023/142169 2022-12-29 2023-12-27 Procédé et appareil d'estimation d'erreur de synchronisation, et dispositif et support de stockage lisible WO2024140753A1 (fr)

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CN202211710659.7 2022-12-29
CN202211710659.7A CN118283767A (zh) 2022-12-29 2022-12-29 同步误差的估计方法、装置、设备及可读存储介质

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150038166A1 (en) * 2012-07-17 2015-02-05 At&T Mobility Ii Llc Facilitation of delay error correction in timing-based location systems
CN106231561A (zh) * 2016-09-29 2016-12-14 京信通信技术(广州)有限公司 一种定位方法和装置
CN109547183A (zh) * 2018-12-06 2019-03-29 电子科技大学 一种全双工环境反向散射通信系统、传输方法及资源分配方法
CN110971326A (zh) * 2018-09-28 2020-04-07 华为技术有限公司 一种时间同步的方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150038166A1 (en) * 2012-07-17 2015-02-05 At&T Mobility Ii Llc Facilitation of delay error correction in timing-based location systems
CN106231561A (zh) * 2016-09-29 2016-12-14 京信通信技术(广州)有限公司 一种定位方法和装置
CN110971326A (zh) * 2018-09-28 2020-04-07 华为技术有限公司 一种时间同步的方法和装置
CN109547183A (zh) * 2018-12-06 2019-03-29 电子科技大学 一种全双工环境反向散射通信系统、传输方法及资源分配方法

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