WO2024140545A1 - 反向散射通信方法、通信装置以及存储介质 - Google Patents
反向散射通信方法、通信装置以及存储介质 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/16—Code allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
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- an embodiment of the present disclosure provides a backscatter communication method, which includes: obtaining a first sequence, wherein the first sequence includes at least one zero element and/or at least one non-zero element; and detecting a backscatter signal according to the first sequence to obtain a detection result.
- an embodiment of the present disclosure provides a communication device, including: a memory and a processor; the memory and the processor are coupled; the memory is used to store instructions executable by the processor; when the processor executes the instructions, the method described in the above aspects is implemented.
- FIG2 is a flow chart of a backscatter communication method according to an embodiment of the present disclosure.
- FIG3 is a flow chart of another backscatter communication method according to an embodiment of the present disclosure.
- FIG4 is a flowchart of yet another backscatter communication method according to an embodiment of the present disclosure.
- FIG5 is a flowchart of yet another backscatter communication method according to an embodiment of the present disclosure.
- FIG8 is a flowchart of yet another backscatter communication method according to an embodiment of the present disclosure.
- FIG11 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present disclosure.
- FIG12 is a schematic structural diagram of another backscatter communication device according to an embodiment of the present disclosure.
- FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.
- first”, “second”, etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
- a feature defined as “first”, “second”, etc. may explicitly or implicitly include one or more of the features.
- Backscatter communication can communicate through the absorption or reflection of electromagnetic waves.
- the sender such as an electronic tag, etc.
- the sender does not need to actively generate electromagnetic waves, but transmits information by controlling the reflection of electromagnetic waves generated by other devices.
- the sender represents different information through different reflections. Since electromagnetic waves will be absorbed or reflected back to a certain extent when encountering media with different impedances during propagation, in order to achieve different reflections, the impedance can be switched at the sender's antenna. For example, the impedance can be switched according to the information to be transmitted to achieve different reflections of electromagnetic waves, thereby realizing the transmission of information.
- nodes or devices such as tags can also have no external power supply at all, such as passive tags.
- the tag can obtain energy from the incident electromagnetic wave through a circuit that absorbs electromagnetic wave energy. The way of energy acquisition has a significant impact on the implementation complexity of passive tags and the performance of backscattering.
- backscatter communication technology can reduce the power consumption of the device by several orders of magnitude. Therefore, backscatter communication technology has great advantages in applications such as the Internet of Things. Based on nodes or devices such as passive tags, passive communication, zero-power communication, passive IoT, or ambient IoT can be achieved. Ambient IoT does not require an independent RF signal transmitter to transmit an excitation signal to the tag, but uses RF signals in the surrounding environment, such as radio and television signals, cellular network signals, or wireless LAN signals, as an excitation source, and achieves communication by reflecting these electromagnetic waves differently, thereby further reducing system energy consumption.
- nodes or devices such as passive tags, passive communication, zero-power communication, passive IoT, or ambient IoT can be achieved.
- Ambient IoT does not require an independent RF signal transmitter to transmit an excitation signal to the tag, but uses RF signals in the surrounding environment, such as radio and television signals, cellular network signals, or wireless LAN signals, as an excitation source, and achieves communication by reflecting these electromagnetic waves differently
- OOK or ASK modulation In backscatter communication, when the tag is reflecting, OOK or ASK modulation can be used. Each symbol can be in two states: full absorption or full reflection, so 1 bit can be transmitted. Tags based on OOK or ASK modulation only need two impedances, and then only one RF switch can be used to switch impedances. The receiver only needs simple energy detection to detect OOK or ASK modulated signals. Backscatter communication using OOK or ASK modulation is relatively simple to implement on both the transmitting and receiving sides. However, since the distribution of bits "0" and "1" may be uneven, there will be problems with poor energy collection stability when using OOK or ASK modulation, which will require the tag to use a larger capacitor. The tag can also use BPSK modulation.
- the tag absorbs enough energy through an impedance matching mode before communication to complete energy collection, and then fully reflects each symbol to achieve a reflection coefficient of 1 or -1 through two impedances, thereby achieving BPSK modulation.
- the performance of BPSK modulation will be better, but the complexity of the transmitting and receiving sides will increase.
- the method of collecting energy before communicating requires sufficient energy to be collected before communication, which requires the tag to have a large capacitor.
- some backscatter communication technologies mainly use orthogonal access mechanisms in traditional communications, such as time division multiple access, when facing multi-user scenarios.
- traditional communications such as time division multiple access
- due to the low symbol rate of backscatter communication when there are many users, it will cause a large communication delay and the number of users supported is relatively small.
- some backscatter communication technologies have weak support capabilities for multi-user transmission, support a small number of users and have low communication efficiency.
- the backscatter communication method includes: acquiring a first sequence, wherein the first sequence includes at least one zero element and/or at least one non-zero element; and performing backscatter communication based on the first sequence.
- the user can collect energy at the position corresponding to the zero element and reflect the signal at the position corresponding to the non-zero element, so that relatively stable energy collection can be achieved in backscatter communication, and a relatively small capacitor can be used.
- multiple users can obtain the first sequence and perform backscatter communication respectively, so as to achieve better multi-user multiplexing, thereby increasing the number of supported users and improving the communication performance of the system.
- the backscatter communication system 100 includes: a radio frequency signal source 101 , a first node 102 and a second node 103 .
- the RF signal source 101 is an available RF source.
- the RF signal source 101 may be independently deployed, for example, a dedicated RF transmitter may be deployed as a RF signal source; or it may not be independently deployed, for example, the same device may be used as both a RF signal source and a receiver; or, the RF signal source may come from a broadcast television signal transmission tower, a mobile communication system base station, and a wireless fidelity (Wi-Fi) access point in the surrounding environment.
- Wi-Fi wireless fidelity
- the present disclosure does not limit the form of the RF signal source.
- the RF signal source 101 may send a wireless RF signal within a communication frequency range.
- the first node 102 may also be referred to as a transmitting device.
- the first node 102 includes at least one of the following: an electronic tag, a passive tag, a sensor, a terminal, a user equipment, a transmitter, or a backscatter communication node, etc.
- the first node 102 may generate an induced current based on the wireless radio frequency signal sent by the radio frequency signal source 101 and then enter a working state.
- the first node 102 has two working states: reflection and non-reflection.
- the transmission of different bits or different symbols can be achieved through different working states, for example, when sending a bit "0", the working state of the non-reflecting signal is entered, and when sending a bit "1", the working state of the reflecting signal is entered.
- the first node 102 may enter different working states by switching impedance, for example, when adjusting the impedance to a complete mismatch, the reflecting signal state is entered, and when adjusting the impedance to a complete match, the non-reflecting signal state or the receiving signal state is entered.
- different signals may also be reflected by switching impedance, for example, different signals are reflected by two different impedances respectively to achieve the transmission of the symbol "1" or "-1".
- the RF signal source 101, the first node 102 and the second node 103 may be deployed independently or in combination as needed.
- the RF signal source 101 and the second node 103 may be deployed in combination, which is not limited in the present disclosure.
- the number of the RF signal source 101, the first node 102 or the second node 103 in the backscatter communication system 100 may be one.
- the number may be one or more, which is not limited in the present disclosure.
- the non-zero element includes at least one of the following: 1, 1i, -1, and -1i.
- the value of the non-zero element may be 1.
- the value of the non-zero element may include 1 and -1.
- the value of the non-zero element may include 1i and -1i.
- the value of the non-zero element may include 1, 1i, -1, and -1i. i is an imaginary unit.
- the length of the first sequence is L, where L is an integer greater than 1.
- L can be any integer from 2 to 8.
- the first sequence is a sparse sequence. It should be understood that the sparse sequence includes a certain number or a certain proportion of zero elements. This is conducive to the first node collecting more energy at the position corresponding to the zero element when performing backscatter communication based on the first sequence.
- the first sequence may be preset, or determined according to system configuration information, or determined according to information received from the second node. It should be understood that the present disclosure does not limit the configuration method of the first sequence.
- the first sequence may be obtained based on at least one of at least one sequence set, data to be transmitted, first data, or a pilot.
- the first data includes bits or symbols generated based on the data to be transmitted.
- the data to be transmitted includes at least one of the following information: identity information, information of the first sequence, information of at least one pilot, state information, perception information, indication information, payload data, and a designated message.
- backscatter communication is performed based on the first sequence.
- backscatter communication when backscatter communication is performed based on a first sequence, backscatter communication may be performed based on the first sequence and first data; or, backscatter communication may be performed on the first data based on the first sequence; or, backscatter communication may be performed on the first sequence; or, second data may be obtained based on the first data and the first sequence, and then backscatter communication may be performed on the second data.
- step S102 is implemented as, for example, S1021 a and S1022 a .
- the first node may determine the impedance state or circuit state to be adopted according to the value of the first data and the non-zero element.
- the first node may multiply the first data by the value of the non-zero element in the first sequence to obtain a symbol to be transmitted, and reflect the signal according to the symbol to be transmitted.
- the first node may determine the impedance state or circuit state to be adopted according to the symbol to be transmitted. It should be understood that when the symbol to be transmitted is a zero symbol, the first node does not reflect the signal; when the symbol to be transmitted is a non-zero symbol, the first node reflects the signal.
- the first node may adopt different impedance states or circuit states so that the receiving end (e.g., the second node) can distinguish different symbols.
- the second data includes at least L symbols, where L is the length of the first sequence.
- the second data can be a data symbol sequence (i.e., the second sequence) [-1, 0, -1, 0] obtained by multiplying the first data by the first sequence. It can be seen that the positions of the zero symbol and the non-zero symbol in the second sequence correspond to the positions of the zero elements and the non-zero elements in the first sequence, respectively.
- the technical solution provided by the embodiments of the present disclosure can achieve relatively stable energy collection, enable multiple users to respectively obtain the first sequence and perform backscatter communication, and achieve better multi-user multiplexing, thereby increasing the number of users supported and improving the system communication performance.
- S101 is implemented as S1011.
- a first sequence is acquired from at least one sequence set.
- At least one sequence set includes a first sequence set, and the first node obtains a first sequence from the first sequence set.
- the first sequence set includes the following 16 sequences of length 6: [1,0,1,0,1,0]; [-1,0,1,0,-1,0]; [1,0,-1,0,-1,0]; [-1,0,-1,0,1,0]; [1,0,0,1,0]; [1,0,0,1,0,1]; [-1,0,0,1,0,-1]; [1,0,0,-1,0,-1]; [-1,0 ,0,1]; [0,1,1,0,0,1]; [0,-1,1,0,0,-1]; [0,1,-1,0,0,-1]; [0,-1,-1,0,0,1]; [0,1,-1,-1,0,0,1]; [0,1,0,1,1,0]; [0,-1,0,0,1]; [0,1,0,1,1,0]
- the first sequence set is an ETF sequence set, each sequence includes 3 zero elements and 3 non-zero elements, and the value of the non-zero element is 1 or -1.
- the distribution of zero elements and non-zero elements in the first sequence set is relatively uniform, and at most 2 consecutive elements are non-zero.
- the first sequence set contains a large number of sequences.
- the overload rate is defined here as The number of sequences is divided by the sequence length, and the overload rate of the first sequence set is 16/6. Therefore, when the first sequence set is used for backscatter communication, it is beneficial for multiple users to select different first sequences, thereby facilitating an increase in the number of supported users.
- At least one sequence set includes a second sequence set, and the first node obtains the first sequence from the second sequence set.
- the second sequence set includes the following 16 sequences of length 6: [1,1,1,0,0,0]; [-1,1,-1,0,0,0]; [1,-1,-1,0,0]; [1,-1,1,0,0]; [1,0,0,1,1,0]; [-1,0,0,1,-1,0]; [1,0,0,1,-1,0]; [1,0,0,-1,-1,0]; [-1,0 ,0,-1,1,0]; [0,1,0,1,0,1]; [0,-1,0,1,0,-1]; [0,1,0,-1,0,-1]; [0,-1,0,-1]; [0,0,-1,0,1]; [0,0,1,0,1,1]; [0,0,-1,0,1,-1]; [0,0,1,0,1,1]; [0,0,
- At least one sequence set includes a sixth sequence set, and the sixth sequence set includes the following 6 sequences of length 3: [1,1,0]; [1,-1,0]; [1,0,1]; [1,0,-1]; [0,1,1]; and [0,1,-1]. It can be seen that each sequence in the sixth set of sequences includes 1 zero element and 2 non-zero elements, and the value of the non-zero element is 1 or -1.
- sequences in the sequence set are used for backscatter communication, since each sequence has 1 zero element, that is, only 1 position can be used for energy collection, it can be used for backscatter communication at a shorter distance.
- the detection result of at least one pilot includes a channel estimation result of at least one pilot and/or the identified at least one pilot.
- the second node may determine the first sequence based on the identified at least one pilot.
- the detection result of at least one pilot may also include a pilot parameter of at least one pilot so that the second node identifies the pilot based on the pilot parameter.
- the backscatter communication method provided by the embodiment of the present disclosure can achieve relatively stable energy collection, and can enable multiple users to respectively obtain the first sequence and perform backscatter communication, thereby achieving better multi-user multiplexing, thereby increasing the number of users supported and improving the system communication performance.
- the first communication module 201 is, for example, configured to acquire second data according to the first data and the first sequence; and perform backscatter communication according to the second data, wherein the second data includes at least one zero symbol and/or at least one non-zero symbol.
- the embodiment of the present disclosure provides a structural diagram of a communication device involved in the above-mentioned embodiment.
- the communication device 400 includes: a communication interface 403, a processor 402, and a bus 404.
- the communication device may also include a memory 401.
- the communication interface 403 is used to connect with other devices through a communication network.
- the communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.
- the memory 401 may exist independently of the processor 402, and the memory 401 may be connected to the processor 402 via a bus 404 to store instructions or program codes.
- the processor 402 calls and executes the instructions or program codes stored in the memory 401, the backscatter communication method provided in the embodiment of the present disclosure can be implemented.
- the embodiments of the present disclosure also provide a computer program product comprising instructions.
- the computer program product When the computer program product is executed on a computer, the computer is enabled to execute the backscatter communication method described in any one of the above embodiments.
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Abstract
Description
Claims (22)
- 一种反向散射通信方法,包括:获取第一序列,其中,所述第一序列包括至少一个零元素和/或至少一个非零元素;基于所述第一序列进行反向散射通信。
- 根据权利要求1所述的方法,其中,所述非零元素的取值包括以下至少之一:1、1i、-1、以及-1i。
- 根据权利要求1所述的方法,其中,所述第一序列的长度为L,L为大于1的整数;并且,所述第一序列的零元素的数量等于对L/2向下取整所得的整数;或者,所述第一序列的零元素的数量等于对L/2向上取整所得的整数;或者,所述第一序列的零元素的数量等于L减1;或者,所述第一序列的零元素的数量等于1。
- 根据权利要求1所述的方法,其中,所述获取第一序列包括:从至少一个序列集合获取所述第一序列;其中,所述至少一个序列集合包括至少一个非正交序列集合和/或至少一个正交序列集合,所述至少一个非正交序列集合包括N条长度为L的序列,N为大于1的整数且N大于L,L为大于1的整数,或者,所述至少一个非正交序列集合包括等角紧框架ETF序列集合。
- 根据权利要求1所述的方法,其中,所述获取第一序列包括:从第一序列集合中获取所述第一序列,其中,所述第一序列集合包括以下16条长度为6的序列:
[1,0,1,0,1,0];
[-1,0,1,0,-1,0];
[1,0,-1,0,-1,0];
[-1,0,-1,0,1,0];
[1,0,0,1,0,1];
[-1,0,0,1,0,-1];
[1,0,0,-1,0,-1];
[-1,0,0,-1,0,1];
[0,1,1,0,0,1];
[0,-1,1,0,0,-1];
[0,1,-1,0,0,-1];
[0,-1,-1,0,0,1];
[0,1,0,1,1,0];
[0,-1,0,1,-1,0];
[0,1,0,-1,-1,0];
[0,-1,0,-1,1,0]。 - 根据权利要求1所述的方法,其中,所述获取第一序列包括:从第二序列集合中获取所述第一序列;其中,所述第二序列集合包括以下16条长度为6的序列:
[1,1,1,0,0,0];
[-1,1,-1,0,0,0];
[1,-1,-1,0,0,0];
[-1,-1,1,0,0,0];
[1,0,0,1,1,0];
[-1,0,0,1,-1,0];
[1,0,0,-1,-1,0];
[-1,0,0,-1,1,0];
[0,1,0,1,0,1];
[0,-1,0,1,0,-1];
[0,1,0,-1,0,-1];
[0,-1,0,-1,0,1];
[0,0,1,0,1,1];
[0,0,-1,0,1,-1];
[0,0,1,0,-1,-1];
[0,0,-1,0,-1,1]。 - 根据权利要求1所述的方法,其中,所述获取第一序列包括:从第三序列集合中获取所述第一序列;其中,所述第三序列集合包括以下12条长度为4的序列:
[1,1,0,0];
[1,-1,0,0];
[1,0,1,0];
[1,0,-1,0];
[1,0,0,1];
[1,0,0,-1];
[0,1,1,0];
[0,1,-1,0];
[0,1,0,1];
[0,1,0,-1];
[0,0,1,1];
[0,0,1,-1]。 - 根据权利要求1所述的方法,其中,所述获取第一序列包括:根据待传输数据获取所述第一序列;其中,所述待传输数据包括所述第一序列的信息,或者,所述待传输数据包括用于指示所述第一序列的信息的第一指定数据。
- 根据权利要求1所述的方法,其中,所述获取第一序列包括:根据至少一个导频获取所述第一序列。
- 根据权利要求1所述的方法,其中,所述获取第一序列包括:根据第一数据获取所述第一序列。
- 根据权利要求1所述的方法,其中,所述基于所述第一序列进行反向散射通信,包括:在所述第一序列的零元素对应的位置上,不反射信号;在所述第一序列的非零元素对应的位置上,根据第一数据和/或所述非零元素反射信号。
- 根据权利要求1所述的方法,其中,所述基于所述第一序列进行反向散射通信,包括:根据第一数据和所述第一序列,获取第二数据;根据所述第二数据进行反向散射通信;其中,所述第二数据包括至少一个零符号和/或至少一个非零符号。
- 根据权利要求12所述的方法,其中,所述根据所述第二数据进行反向散射通信,包括:在所述第二数据中零符号对应的位置上不反射信号;在所述第二数据中非零符号对应的位置上,根据所述非零符号反射信号。
- 根据权利要求10至13任一项所述的方法,其中,所述第一数据包括根据待传输数据生成的比特或符号;其中,所述待传输数据包括以下信息至少之一:身份信息、所述第一序列的信息、至少一个导频的信息、状态信息、感知信息、指示信息、载荷数据、以及指定消息。
- 一种反向散射通信方法,包括:获取第一序列,其中,所述第一序列包括至少一个零元素和/或至少一个非零元素;根据所述第一序列对反向散射信号进行检测,获取检测结果。
- 根据权利要求15所述的方法,其中,所述非零元素的取值包括以下至少之一:1、1i、-1、以及-1i。
- 根据权利要求15所述的方法,其中,所述获取第一序列包括:从至少一个序列集合获取所述第一序列;其中,所述至少一个序列集合包括至少一个非正交序列集合和/或至少一个正交序列集合,所述至少一个非正交序列集合包括N条长度为L的序列,N为大于1的整数且N大于L,L为大于1的整数,或者,所述至少一个非正交序列集合包括等角紧框架ETF序列集合。
- 根据权利要求15所述的方法,其中,所述获取第一序列包括:对至少一个导频的反向散射信号进行检测,获取所述至少一个导频的检测结果;根据所述至少一个导频的检测结果获取所述第一序列。
- 根据权利要求15所述的方法,其中,所述获取第一序列包括:根据所述反向散射信号进行序列识别,获取识别到的至少一个序列,将所识别到的至少一个序列作为所述第一序列。
- 根据权利要求15所述的方法,还包括:根据所述检测结果获取传输的数据,从所述传输的数据中获取以下信息至少之一:身份信息、所述第一序列的信息、至少一个导频的信息、状态信息、感知信息、指示信息、载荷数据、以及指定消息。
- 一种通信装置,包括:存储器和处理器;其中,所述存储器与所述处理器耦合;所述存储器用于存储所述处理器可执行的指令;所述处理器执行所述指令时执行根据权利要求1至20中任一项所述的反向散射通信方法。
- 一种计算机可读存储介质,其中,所述计算机可读存储介质上存储有计算机程序指令,当所述计算机程序指令在计算机上运行时,使得所述计算机执行根据权利要求1至20中任一项所述的反向散射通信方法。
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| Application Number | Priority Date | Filing Date | Title |
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| EP23910471.4A EP4601217A4 (en) | 2022-12-30 | 2023-12-25 | METHOD AND APPARATUS FOR COMMUNICATION BY BACKSPREADING AND STORAGE MEDIA |
| JP2025520002A JP2025534467A (ja) | 2022-12-30 | 2023-12-25 | バックスキャッタ通信方法、通信装置及び記憶媒体 |
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| CN101546370A (zh) * | 2008-03-25 | 2009-09-30 | 索尼株式会社 | 通信系统和通信装置 |
| CN109412992A (zh) * | 2018-11-13 | 2019-03-01 | 上海交通大学 | 基于正交频分多址技术的反向散射系统及方法 |
| WO2020244392A1 (zh) * | 2019-06-06 | 2020-12-10 | 华为技术有限公司 | 一种信号的发送、接收方法及通信装置 |
| CN112073082A (zh) * | 2019-05-22 | 2020-12-11 | 成都华为技术有限公司 | 反向散射通信方法、激励设备、反射设备以及接收设备 |
| WO2022078331A1 (zh) * | 2020-10-14 | 2022-04-21 | 维沃移动通信有限公司 | 信号发送和信号接收方法、终端及通信设备 |
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| US9680520B2 (en) * | 2013-03-22 | 2017-06-13 | University Of Washington Through Its Center For Commercialization | Ambient backscatter tranceivers, apparatuses, systems, and methods for communicating using backscatter of ambient RF signals |
| US10020839B2 (en) * | 2016-11-14 | 2018-07-10 | Rampart Communications, LLC | Reliable orthogonal spreading codes in wireless communications |
| US10999848B2 (en) * | 2018-10-01 | 2021-05-04 | Research & Business Foundation Sungkyunkwan University | Sparse-coded ambient backscatter communication method and system |
| CN113315729B (zh) * | 2020-02-27 | 2024-11-29 | 华为技术有限公司 | 一种通信方法及装置 |
| CN117203948A (zh) * | 2021-04-20 | 2023-12-08 | 华为技术有限公司 | 反向散射通信系统中的多址接入 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546370A (zh) * | 2008-03-25 | 2009-09-30 | 索尼株式会社 | 通信系统和通信装置 |
| CN109412992A (zh) * | 2018-11-13 | 2019-03-01 | 上海交通大学 | 基于正交频分多址技术的反向散射系统及方法 |
| CN112073082A (zh) * | 2019-05-22 | 2020-12-11 | 成都华为技术有限公司 | 反向散射通信方法、激励设备、反射设备以及接收设备 |
| WO2020244392A1 (zh) * | 2019-06-06 | 2020-12-10 | 华为技术有限公司 | 一种信号的发送、接收方法及通信装置 |
| WO2022078331A1 (zh) * | 2020-10-14 | 2022-04-21 | 维沃移动通信有限公司 | 信号发送和信号接收方法、终端及通信设备 |
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| EP4601217A4 (en) | 2026-01-28 |
| EP4601217A1 (en) | 2025-08-13 |
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