Information indication method and apparatus, first network element, and a-iot device

Abstract

The present application provides an information indication method and apparatus, a first network element, and an ambient Internet of Things (A-IoT) device. The method comprises: a first network element indicates first information to an A-IoT device by means of a pattern of a first signal and / or a time domain length of the first signal, wherein the first information is used for indicating at least one of the following: the start of reader to device (R2D) transmission, the start of transmission of an R2D preamble, the start of transmission of an R2D time acquisition signal, and the start of transmission of an R2D timing acquisition signal.

Description

Information indication method and device, first network element and A-IoT device

[0001] The present disclosure claims priority to the Chinese patent application No. 202411383867.X, filed on September 30, 2024, and entitled "Information indication method and device, first network element and A-IoT device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of communication, and particularly refers to an information indication method, device, first network element and A-IoT device. BACKGROUND

[0003] In order to support trillion-level Internet of Things (IoT) and solve the network construction cost and high operation cost caused by battery replacement in large-scale deployment of IoT, a new type of IoT device, Ambient IoT (A-IoT), is designed. The A-IoT device has no or limited energy storage capability, and has the characteristics of low complexity, low cost and low power consumption, which will help to realize the Internet of Everything (IoE) and the Internet of Things (IoT).

[0004] In A-IoT communication, a base station or a terminal reader sends a physical reader to device channel (PRDCH) to A-IoT devices to indicate different types of A-IoT devices to complete the backscattering of incident signals or to autonomously send uplink response signals. Before receiving the PRDCH sent by the reader, the A-IoT device first needs to know the PRDCH or the transmission parameters of the reader to device (R2D). Since no synchronization signal and PBCH block (SSB) is sent in the A-IoT system, and no strict synchronization is established between the device and the reader, how the reader informs the A-IoT device of the transmission parameters of the PRDCH becomes an important problem to be solved, so that the A-IoT device can receive and demodulate the PRDCH based on the transmission parameters of the PRDCH. SUMMARY

[0005] Embodiments of the present disclosure aim to provide an information indication method, device, first network element and A-IoT device to solve the problem that the transmission parameters of the downlink channel cannot be informed to the A-IoT device due to the absence of a broadcast channel in the A-IoT system.

[0006] To solve the above problems, the embodiment of the disclosure provides an information indication method, which comprises:

[0007] The first network element indicates the first information to the ambient Internet of Things (A-IoT) device through a pattern of the first signal and / or a time domain length of the first signal.

[0008] The first information is used to indicate at least one of the following: start of a Reader-to-Device (R2D) transmission, start of an R2D preamble, start of an R2D time acquisition signal, and start of an R2D timing acquisition signal.

[0009] The first signal comprises at least one of the following: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, and a start indication component of an R2D timing acquisition signal.

[0010] In some embodiments, the first low-voltage transmission or the first high-voltage transmission in the pattern of the first signal is a guard interval.

[0011] In some embodiments, the pattern of the first signal is different from a pattern of a clock acquisition component.

[0012] Alternatively,

[0013] The pattern of the first signal is different from a pattern of a Physical Reader-to-Device Channel (PRDCH).

[0014] The pattern of the first signal comprises at least one of the following:

[0015] At least one high-voltage transmission and at least one low-voltage transmission.

[0016] At least one low-voltage transmission and at least three high-voltage transmissions.

[0017] At least one high-voltage transmission and at least three low-voltage transmissions.

[0018] In some embodiments, the pattern of the first signal comprises at least one of the following:

[0019] Two low-voltage transmissions and three high-voltage transmissions.

[0020] Two low-voltage transmissions and four high-voltage transmissions.

[0021] Two low-voltage transmissions and five high-voltage transmissions.

[0022] Two high-voltage transmissions and three low-voltage transmissions.

[0023] Two high-voltage transmissions and four low-voltage transmissions.

[0024] 2 high voltage transmissions and 5 low voltage transmissions.

[0025] In some embodiments, the first signal occupies 1 orthogonal frequency division multiplexing, OFDM, symbol;

[0026] or,

[0027] the first signal occupies at least 2 OFDM symbols.

[0028] wherein the first signal occupies a plurality of OFDM symbols, and a pattern in each OFDM symbol occupied is the same.

[0029] In some embodiments, the first parameter comprises at least one of:

[0030] reader-to-device, R2D, chip length, on-off keying, OOK, chip length, device-to-reader, D2R, chip length, chip length of a PRDCH, chip length of a physical device-to-reader channel, PDRCH, R2D chip rate, OOK chip rate, D2R chip rate, chip rate of a PRDCH, chip rate of a PDRCH;

[0031] In some embodiments, a time domain length of the first signal comprises at least one of:

[0032] M is equal to 1, and the time domain length of the first signal is 4 OFDM symbols or 6 OFDM symbols;

[0033] M is equal to 2, and the time domain length of the first signal is 2 OFDM symbols or 3 OFDM symbols;

[0034] M is equal to 4, and the time domain length of the first signal is 1 OFDM symbol or 1.5 OFDM symbols;

[0035] M is equal to 6, and the time domain length of the first signal is 2 / 3 OFDM symbols or 1 OFDM symbol;

[0036] M is equal to 8, and the time domain length of the first signal is 1 / 2 OFDM symbol or 3 / 4 OFDM symbol;

[0037] M is equal to 12, and the time domain length of the first signal is 1 / 3 OFDM symbol or 1 / 2 OFDM symbol;

[0038] M is equal to 16, and the time domain length of the first signal is 1 / 4 OFDM symbol or 3 / 8 OFDM symbol;

[0039] M is equal to 24, and the time domain length of the first signal is 1 / 6 OFDM symbol or 1 / 4 OFDM symbol;

[0040] M is equal to 32, and a time domain length of the first signal is 1 / 8 OFDM symbol or 3 / 16 OFDM symbol.

[0041] M is equal to 32, and a time domain length of the first signal is 1 / 8 OFDM symbol or 3 / 16 OFDM symbol.

[0042] In some embodiments, the first network element indicates the first information to the A-IoT device through a pattern of the first signal, including:

[0043] The first network element indicates the first information to the A-IoT device of different device types through different patterns of the first signal according to the device types of the A-IoT device.

[0044] In some embodiments, the patterns are different, including that a pattern of the first object and a pattern of the second object are different.

[0045] The patterns of the first object and the second object are different, including:

[0046] The combination of high voltage transmission and low voltage transmission in the first object and the combination of high voltage transmission and low voltage transmission in the second object are different.

[0047] Or,

[0048] The sequence used by the first object and the sequence used by the second object are different.

[0049] Embodiments of the present disclosure also provide an information indication method, including:

[0050] The A-IoT device receives the first signal sent by the first network element.

[0051] The A-IoT device determines the first information according to the pattern of the first signal and / or the time domain length of the first signal, wherein:

[0052] The first information is used to indicate at least one of the following: start of reader-to-device (R2D) transmission, start of R2D preamble, start of R2D time acquisition signal, start of R2D timing acquisition signal.

[0053] The first signal includes at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, start indication component of R2D preamble, start indication component of R2D time acquisition signal, start indication component of R2D timing acquisition signal.

[0054] In some embodiments, the method further includes:

[0055] The A-IoT device receives first control information of PRDCH transmission after the first signal by the first network element.

[0056] The first control information is repeatedly transmitted at least twice, or the first control information is channel encoded.

[0057] The present disclosure also provides a first network element, comprising a memory, a transceiver, and a processor.

[0058] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations:

[0059] The first information is used to indicate at least one of the following: a start of a reader-to-device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal.

[0060] The first information is used to indicate at least one of the following: a start of a reader-to-device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal.

[0061] The first signal comprises at least one of the following: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, and a start indication component of an R2D timing acquisition signal.

[0062] The present disclosure also provides an A-IoT device, comprising a memory, a transceiver, and a processor.

[0063] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations:

[0064] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations:

[0065] The first information is used to indicate at least one of the following: a start of a reader-to-device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal.

[0066] The first information is used to indicate at least one of the following: a start of a reader-to-device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal.

[0067] The first signal comprises at least one of the following: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, and a start indication component of an R2D timing acquisition signal.

[0068] The present disclosure also provides an information indication device, comprising:

[0069] an indication unit, configured to indicate first information to an ambient Internet of Things (A-IoT) device through a pattern of the first signal and / or a time domain length of the first signal; wherein,

[0070] the first information is used to indicate at least one of a start of a Reader-to-Device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal.

[0071] the first signal comprises at least one of the R2D preamble, the R2D time acquisition signal, the R2D timing acquisition signal, a start indication component, a start indication component of the R2D preamble, a start indication component of the R2D time acquisition signal, and a start indication component of the R2D timing acquisition signal.

[0072] The embodiments of the present disclosure further provide an information indication apparatus, and the apparatus comprises:

[0073] a receiving unit, configured to receive a first signal sent by a first network element;

[0074] a determining unit, configured to determine first information according to a pattern of the first signal and / or a time domain length of the first signal; wherein,

[0075] the first information is used to indicate at least one of a start of a Reader-to-Device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal.

[0076] the first signal comprises at least one of the R2D preamble, the R2D time acquisition signal, the R2D timing acquisition signal, a start indication component, a start indication component of the R2D preamble, a start indication component of the R2D time acquisition signal, and a start indication component of the R2D timing acquisition signal.

[0077] The embodiments of the present disclosure further provide a processor-readable storage medium, which stores a program for causing a processor to execute the method described above.

[0078] The above technical solutions of the present disclosure have at least the following beneficial effects:

[0079] In the information indication method, the apparatus, the first network element and the A-IoT device provided by the embodiments of the present disclosure, the first network element indicates first information to the A-IoT device through a pattern of the first signal and / or a time domain length of the first signal, and the first information is used to indicate at least one of the following: a transmission start of a Reader-to-Device (R2D), a transmission start of a R2D preamble, a transmission start of a R2D time acquisition signal, and a transmission start of a R2D timing acquisition signal. By using the information indication method, the first network element can indicate transmission parameters such as the transmission start to the A-IoT device, so that the A-IoT device can receive and decode the Physical Reader-to-Device Channel (PRDCH) according to the obtained transmission start information, solve the problem of notification of the transmission start time of the PRDCH, enable the A-IoT device to communicate with the first network element in the A-IoT mode, and improve the flexibility of configuration of the transmission parameters of the PRDCH. BRIEF DESCRIPTION OF DRAWINGS

[0080] FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present disclosure can be applied;

[0081] FIG. 2 shows a step flowchart of an information indication method provided by an embodiment of the present disclosure;

[0082] FIG. 3 shows a schematic diagram of a first signal in Example 1 provided by an embodiment of the present disclosure;

[0083] FIG. 4 shows a schematic diagram of a first signal in Example 2 provided by an embodiment of the present disclosure;

[0084] FIG. 5 shows a schematic diagram of a first signal in Example 2 provided by an embodiment of the present disclosure;

[0085] FIG. 6 shows a schematic diagram of a first signal in Example 2 provided by an embodiment of the present disclosure;

[0086] FIG. 7 shows a schematic diagram of a first signal in Example 3 provided by an embodiment of the present disclosure;

[0087] FIG. 8 shows a schematic diagram of a first signal in Example 3 provided by an embodiment of the present disclosure;

[0088] FIG. 9 shows a schematic diagram of a first signal in Example 4 provided by an embodiment of the present disclosure;

[0089] FIG. 10 shows a schematic diagram of a first signal in Example 4 provided by an embodiment of the present disclosure;

[0090] FIG. 11 shows a schematic diagram of a first signal in Example 4 provided by an embodiment of the present disclosure;

[0091] FIG. 12 shows a schematic diagram of a first signal in Example 5 provided by an embodiment of the present disclosure;

[0092] FIG. 13 shows a second schematic diagram of the first signal in Example V according to an embodiment of the present disclosure;

[0093] FIG. 14 shows a third schematic diagram of the first signal in Example V according to an embodiment of the present disclosure;

[0094] FIG. 15 shows a first schematic diagram of the first signal in Example VI according to an embodiment of the present disclosure;

[0095] FIG. 16 shows a second schematic diagram of the first signal in Example VI according to an embodiment of the present disclosure;

[0096] FIG. 17 shows a third schematic diagram of the first signal in Example VI according to an embodiment of the present disclosure;

[0097] FIG. 18 shows a second flowchart of the information indication method according to an embodiment of the present disclosure;

[0098] FIG. 19 shows a schematic diagram of the structure of the first network element according to an embodiment of the present disclosure;

[0099] FIG. 20 shows a schematic diagram of the structure of the A-IoT device according to an embodiment of the present disclosure;

[0100] FIG. 21 shows a first schematic diagram of the structure of the information indication apparatus according to an embodiment of the present disclosure;

[0101] FIG. 22 shows a second schematic diagram of the structure of the information indication apparatus according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0102] To make the technical problems to be solved by the present disclosure, technical solutions and advantages clearer, specific embodiments will be described in detail below with reference to the accompanying drawings.

[0103] FIG. 1 shows a topology structure of A-IoT data transmission to which embodiments of the present disclosure can be applied. The topology structure includes a base station and an A-IoT device, and in some embodiments, the topology structure further includes an intermediate node. In one implementation, the intermediate node serves as a Reader to perform data / signaling interaction with the A-IoT device, and the intermediate node performs data / signaling interaction with the network through a Uu interface. In another implementation, the base station directly serves as a Reader to perform data / signaling interaction with the A-IoT device. The intermediate node can be a terminal device, which can also be referred to as a terminal or a user terminal (User Equipment, UE). It should be noted that the specific type of terminal is not limited in the embodiments of the present disclosure. It should be noted that only the base station in the NR system is taken as an example in the embodiments of the present disclosure, but the specific type of base station is not limited.

[0104] The term "and / or" in the embodiments of the present disclosure describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. The term "multiple" in the embodiments of the present disclosure means two or more, and other quantifiers are similar.

[0105] The technical solutions in the embodiments of the present disclosure will be described clearly and completely in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0106] The technical solutions provided by the embodiments of the present disclosure can be applied to various systems. For example, the applicable systems can be a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a long term evolution advanced (LTE-A) system, a universal mobile system (UMTS), a worldwide interoperability for microwave access (WiMAX) system, a 5th generation mobile communication technology (5G) new radio (NR) system and its evolution communication system, a 6th generation mobile communication technology (6G) system, etc. The various systems can include terminal devices and network devices. The system can also include a core network part, such as an evolved packet system (EPC), a 5G core network (5GC), etc.

[0107] The terminal device to which the embodiments of the present disclosure relate can refer to a device providing voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing devices connected to a wireless modem, etc. In different systems, the name of the terminal device can also be different, for example, in the 5G system, the terminal device can be called user equipment (UE). The wireless terminal device can communicate with one or more core networks (CN) through a radio access network (RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (or called "cellular" phone) and a computer with a mobile terminal device, for example, it can be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, which exchanges language and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), etc. The wireless terminal device can also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, which is not limited in the embodiments of the present disclosure.

[0108] The network device related to the embodiments of the present disclosure can be a base station, which can include a plurality of cells serving terminals. According to different application scenarios, the base station can also be referred to as an access point, or can be a device in an access network that communicates with wireless terminal devices through one or more sectors over an air interface, or other names. The network device can be used to exchange received air frames and Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which can include an Internet Protocol (IP) communication network. The network device can also coordinate the management of the properties of the air interface. For example, the network device related to the embodiments of the present disclosure can be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (LTE) system, or a 5G base station (gNB) in a next generation system, or a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., which are not limited in the embodiments of the present disclosure. In some network structures, the network device can include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit can also be geographically separated.

[0109] The network device and the terminal device can each use one or more antennas for multi-input multi-output (MIMO) transmission, which can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). According to the form and number of root antenna combinations, the MIMO transmission can be two-dimensional MIMO (2D-MIMO), three-dimensional MIMO (3D-MIMO), full-dimensional MIMO (FD-MIMO), or massive-MIMO, and can also be diversity transmission or precoding transmission or beamforming transmission, etc.

[0110] As shown in FIG. 2, the embodiment of the present disclosure provides an information indication method, which comprises:

[0111] In step 201, a first network element indicates first information to an ambient Internet of Things (A-IoT) device through a pattern of a first signal and / or a time domain length of the first signal; wherein,

[0112] The first information is used to indicate at least one of the following: a start of reader-to-device (R2D) transmission, a start of R2D preamble, a start of R2D time acquisition signal, and a start of R2D timing acquisition signal.

[0113] The first signal comprises at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indicator part (SIP), start indicator part of R2D preamble, start indicator part of R2D time acquisition signal, and start indicator part of R2D timing acquisition signal.

[0114] In some embodiments, the first network element comprises at least one of the following: a base station, a terminal, a reader, and an intermediate node.

[0115] In some embodiments, the pattern of the first signal is a combination of at least one high-voltage transmission and at least one low-voltage transmission in the first signal.

[0116] As an optional embodiment, the first low-voltage transmission or the first high-voltage transmission in the pattern of the first signal is a guard interval to avoid the influence of a carrier wave (CW) before the first signal on the detection of the first signal.

[0117] As another optional embodiment, the pattern of the first signal is different from a pattern of a Clock Acquisition Part (CAP) or a pattern of a Physical Reader-to-Device Channel (PRDCH).

[0118] In other words, the combination of high voltage transmission and low voltage transmission in the CAP or the PRDCH is different from the combination of high voltage transmission and low voltage transmission in the first signal.

[0119] It should be noted that the n1 low voltage transmissions mentioned in the embodiments of the present disclosure refer to low voltage transmissions with a duration of n1 time units; n1 is an integer greater than or equal to 1; n2 high voltage transmissions refer to high voltage transmissions with a duration of n2 time units; n2 is an integer greater than or equal to 1; and the subsequent description is not repeated.

[0120] It should be further noted that the patterns mentioned in the embodiments of the present disclosure can be the same or different.

[0121] In an implementation manner, the patterns are different, including that a pattern of the first object and a pattern of the second object are different; wherein the pattern of the first object and the pattern of the second object are different, including:

[0122] a combination of high voltage transmission and low voltage transmission in the first object is different from a combination of high voltage transmission and low voltage transmission in the second object;

[0123] or,

[0124] a sequence used by the first object is different from a sequence used by the second object.

[0125] In another implementation manner, the patterns are the same, including that a pattern of the first object and a pattern of the second object are the same; wherein the pattern of the first object and the pattern of the second object are the same, including:

[0126] a combination of high voltage transmission and low voltage transmission in the first object is the same as a combination of high voltage transmission and low voltage transmission in the second object;

[0127] or,

[0128] a sequence used by the first object is the same as a sequence used by the second object.

[0129] In some embodiments, a time domain length of the first object and a time domain length of the second object are the same.

[0130] In some embodiments, a time domain length of the first object and a time domain length of the second object are different.

[0131] In the embodiments of the present disclosure, the first object includes any one of the first signal, the clock acquisition component, or the PRDCH.

[0132] Alternatively, the second object includes any one of the first signal, the clock acquisition component, or the PRDCH.

[0133] In an optional embodiment of the present disclosure, the pattern of the first signal includes at least one of the following:

[0134] At least one high-voltage transmission and at least one low-voltage transmission;

[0135] At least one low-voltage transmission and at least three high-voltage transmissions;

[0136] At least one high-voltage transmission and at least three low-voltage transmissions.

[0137] In another optional embodiment of the present disclosure, the pattern of the first signal includes at least one of the following:

[0138] Two low-voltage transmissions and three high-voltage transmissions;

[0139] Two low-voltage transmissions and four high-voltage transmissions;

[0140] Two low-voltage transmissions and five high-voltage transmissions;

[0141] Two high-voltage transmissions and three low-voltage transmissions;

[0142] Two high-voltage transmissions and four low-voltage transmissions;

[0143] Two high-voltage transmissions and five low-voltage transmissions.

[0144] As an optional embodiment, the combination of high-voltage transmission and low-voltage transmission in the pattern of the first signal includes at least one of the following:

[0145] First high-voltage transmission, second low-voltage transmission, second high-voltage transmission, second high-voltage transmission, second high-voltage transmission; that is, {H1, L2, H2, H2, H2};

[0146] First high-voltage transmission, second low-voltage transmission, second low-voltage transmission, second low-voltage transmission, second high-voltage transmission; that is, {H1, L2, L2, L2, H2};

[0147] First low-voltage transmission, second high-voltage transmission, second high-voltage transmission, second high-voltage transmission, second low-voltage transmission; that is, {L1, H2, H2, H2, L2};

[0148] first low voltage transmission, second high voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission; i.e. {L1, H2, L2, L2, L2, L2};

[0149] first high voltage transmission, second low voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission; i.e. {H1, L2, H2, H2, H2, H2};

[0150] first high voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission, second high voltage transmission; i.e. {H1, L2, L2, L2, L2, H2};

[0151] first low voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission, second low voltage transmission; i.e. {L1, H2, H2, H2, H2, L2};

[0152] first low voltage transmission, second high voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission; i.e. {L1, H2, L2, L2, L2, L2};

[0153] first high voltage transmission, second low voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission; i.e. {H1, L2, H2, H2, H2, H2, H2};

[0154] first high voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission, second high voltage transmission; i.e. {H1, L2, L2, L2, L2, L2, H2};

[0155] first low voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission, second high voltage transmission, second low voltage transmission; i.e. {L1, H2, H2, H2, H2, H2, L2};

[0156] first low voltage transmission, second high voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission, second low voltage transmission; i.e. {L1, H2, L2, L2, L2, L2, L2};

[0157] wherein the first high voltage transmission H1 is a high voltage transmission with a first duration of a duration, the second high voltage transmission H2 is a high voltage transmission with a second duration of the duration, the first low voltage transmission L1 is a low voltage transmission with a third duration of the duration, and the second low voltage transmission L2 is a low voltage transmission with a fourth duration of the duration.

[0158] In an implementation, the first time length, the second time length, the third time length and the fourth time length are the same.

[0159] In another implementation, at least two of the first time length, the second time length, the third time length and the fourth time length are different.

[0160] It should be noted that the present embodiment also relates to a first parameter of the first signal, wherein the first parameter comprises at least one of:

[0161] Reader to Device (R2D) chip length, On-Off Keying (OOK) chip length, Device to Reader (D2R) chip length, chip length of PRDCH, chip length of Physical Device to Reader Channel (PDRCH), R2D chip rate, OOK chip rate, D2R chip rate, chip rate of PRDCH, chip rate of PDRCH;

[0162] The chip rate is used to indicate the number of chips contained in one Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0163] In some embodiments, the different first parameters comprise at least one of:

[0164] different R2D chip length;

[0165] different OOK chip length;

[0166] different D2R chip length;

[0167] different chip rate value.

[0168] In some embodiments, the same first parameters comprise at least one of:

[0169] same R2D chip length;

[0170] same OOK chip length;

[0171] same D2R chip length;

[0172] same chip rate value.

[0173] Example One

[0174] As shown in FIG. 3, in the case of the first signal being SIP, the SIP consists of 4 high-voltage transmissions and 1 low-voltage transmission, and the duration of each high-voltage transmission and low-voltage transmission is T. The first high-voltage transmission in the SIP pattern is a guard period (GP) to avoid the influence of the carrier before the SIP on the detection of the SIP. If there is no such GP, when the CW before the SIP is a low-voltage transmission, the CW will be connected with the low-voltage transmission in the SIP, resulting in that the device cannot detect the low-voltage transmission with a duration of T. Therefore, the GP in the SIP pattern can avoid such a situation and ensure the reliable detection of the device on the pattern after the GP. The duration T(GP) of the GP can be the same as or different from the duration T of the subsequent low-voltage transmission or high-voltage transmission.

[0175] The SIP pattern shown in FIG. 3 does not appear in the clock acquisition part (CAP) or PRDCH, that is, the CAP or PRDCH does not contain the same combination pattern of high-voltage transmission and low-voltage transmission as the SIP. Because, when the CAP or PRDCH adopts Manchester coding, the following "low-voltage transmission with a duration of T + high-voltage transmission with a duration of 3T" does not appear in the CAP or PRDCH, the SIP pattern in FIG. 3 can enable the device to learn the start time of the R2D transmission by detecting the SIP pattern.

[0176] The design scheme of the pattern of the first signal can enable the first network element to indicate the R2D transmission start information to the device by sending the first signal, so that the device can obtain the R2D transmission start information according to the pattern of the first signal, receive and decode the PRDCH, and solve the notification problem of the start time of the PRDCH transmission, so that the A-IoT device and the first network element can perform A-IoT communication.

[0177] The disclosure provides various schemes (through the pattern of the first signal and / or the time domain length of the first signal) for indicating the first information to the A-IoT device, and each scheme is described in detail below.

[0178] Scheme 1: The patterns of the first signal corresponding to different first parameters are the same, and the time domain lengths of the first signal corresponding to different first parameters are the same.

[0179] In some embodiments, the first signal occupies 1 orthogonal frequency division multiplexing (OFDM) symbol; or the first signal occupies at least 2 OFDM symbols.

[0180] Example Two

[0181] The first network element indicates first information to the environmental A-IoT device through a pattern of the first signal; wherein the first information is used to indicate at least one of the following: start of R2D transmission, start of R2D preamble, start of R2D time acquisition signal, start of R2D timing acquisition signal; and the first signal comprises at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, start indication component of R2D preamble, start indication component of R2D time acquisition signal, start indication component of R2D timing acquisition signal.

[0182] Before receiving the PRDCH sent by the first network element, the device needs to know the transmission parameters such as the start time of the PRDCH or R2D transmission first. Since no SSB is sent in the A-IoT system, and no strict synchronization is established between the device and the first network element, a method for informing the device of the R2D transmission start time information needs to be designed, so that the device can demodulate and decode the PRDCH on the basis of knowing the PRDCH transmission start time information. The present disclosure designs a start indication signal (i.e., the first signal or SIP) to indicate the R2D transmission start time information.

[0183] Since in the CAP or PRDCH, when Manchester coding is adopted, the ratio of the duration of adjacent high-voltage transmission and low-voltage transmission is 1:2 at most, in order to ensure that the SIP pattern does not appear in the CAP or PRDCH, i.e., the CAP or PRDCH does not contain the same combination pattern of high-voltage transmission and low-voltage transmission as the SIP, the SIP can contain "low-voltage transmission with a duration of T + high-voltage transmission with a duration of more than 2T" or "high-voltage transmission with a duration of T + low-voltage transmission with a duration of more than 2T", so that the device can know the start time of the R2D transmission by detecting this specially designed SIP pattern.

[0184] As shown in FIG. 4, FIG. 4 corresponds to the case of {H1, L2, H2, H2, H2}, H1 represents high-voltage transmission with a duration of T1 (T1 = T (GP)), L2 represents low-voltage transmission with a duration of T2 (T2 = T), and H2 represents high-voltage transmission with a duration of T2 (T2 = T). In this way, the adjacent low-voltage transmission with a duration of T and high-voltage transmission with a duration of 3T in FIG. 4 can enable the device to distinguish the SIP signal from other signals or channels, and be used to indicate the start of R2D transmission. Similarly, FIG. 5 corresponds to the case of {H1, L2, H2, H2, H2, H2}. FIG. 6 corresponds to the case of {H1, L2, L2, L2, L2, H2}.

[0185] The design scheme of the pattern of the first signal contains 1:3 or 1:4 or 1:5 adjacent low-voltage transmission and high-voltage transmission in the first signal, so that the first network element can indicate the R2D transmission start information to the device by sending the first signal, so that the device can obtain the R2D transmission start information according to the pattern of the first signal, receive and decode the PRDCH, solve the notification problem of the PRDCH transmission start time, and enable the A-IoT device and the first network element to perform A-IoT communication.

[0186] In scheme 2, the patterns of the first signals corresponding to different first parameters are the same, and the time domain lengths of the first signals corresponding to different first parameters are the same.

[0187] In some embodiments, the first signal occupies multiple OFDM symbols, and the pattern in each occupied OFDM symbol is the same.

[0188] Example three

[0189] The first network element indicates first information to the ambient Internet of Things (A-IoT) device through the pattern of the first signal; wherein the first information is used to indicate at least one of the following: reader-to-device (R2D) transmission start, R2D preamble transmission start, R2D time acquisition signal transmission start, R2D timing acquisition signal transmission start; and the first signal includes at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, R2D preamble start indication component, R2D time acquisition signal start indication component, and R2D timing acquisition signal start indication component.

[0190] Before receiving the PRDCH sent by the first network element, the device needs to know the transmission parameters such as the PRDCH or R2D transmission start time first, because no SSB is sent in the A-IoT system, and no strict synchronization is established between the device and the first network element. Therefore, a method for notifying the device of the R2D transmission start time information is needed, so that the device can demodulate and decode the PRDCH on the basis of knowing the PRDCH transmission start time information. The present disclosure designs a start indication signal (i.e., a first signal or SIP) to indicate the R2D transmission start time information.

[0191] Because the longer the length of the SIP is, the better the detection performance is, the SIP can occupy multiple OFDM symbols to improve the detection performance of the device on the SIP. When the SIP occupies multiple OFDM symbols, taking the case of the SIP occupying two OFDM symbols as an example, as shown in FIG. 7, the basic SIP pattern in the first OFDM symbol can be directly lengthened to fill the two OFDM symbols; or as shown in FIG. 8, the basic SIP pattern in the first OFDM symbol can be copied into the second OFDM symbol.

[0192] By adopting the design scheme of the pattern of the first signal, the first signal occupies multiple OFDM symbols by using the method of direct lengthening or copying, so that the first network element can indicate the R2D transmission start information to the device by sending the first signal, so that the device can obtain the R2D transmission start information according to the pattern of the first signal, receive and decode the PRDCH, and solve the problem of notification of the PRDCH transmission start time, so that the A-IoT device and the first network element can perform A-IoT communication.

[0193] In scheme 3, the patterns of the first signal corresponding to different first parameters are the same, and the time domain lengths of the first signal corresponding to different first parameters are different.

[0194] In some embodiments, the first parameter of the first signal is different from the first parameter of the clock acquisition component CAP or the PRDCH. In other words, the first parameter of the SIP is independent of the first parameter of the CAP or the PRDCH, and the first parameters of the two can have different values.

[0195] In some embodiments, the first signal has different lengths under different M values, and the M value is the number of chips contained in one OFDM symbol. Under different M values, the time domain length of the first signal includes at least one of the following:

[0196] M is equal to 1, and the time domain length of the first signal is 4 OFDM symbols;

[0197] M is equal to 2, and the time domain length of the first signal is 2 OFDM symbols;

[0198] M is equal to 4, and the time domain length of the first signal is 1 OFDM symbol;

[0199] M is equal to 6, and the time domain length of the first signal is 2 / 3 OFDM symbols;

[0200] M is equal to 8, and the time domain length of the first signal is 1 / 2 OFDM symbol;

[0201] M is equal to 12, and the time domain length of the first signal is 1 / 3 OFDM symbol;

[0202] M is equal to 16, and the time domain length of the first signal is 1 / 4 OFDM symbol;

[0203] M is equal to 24, and the time domain length of the first signal is 1 / 6 OFDM symbol;

[0204] M is equal to 32, and the time domain length of the first signal is 1 / 8 OFDM symbol.

[0205] Wherein, M is the chip rate.

[0206] Example Four

[0207] The first network element indicates the first information to the ambient Internet of Things A-IoT device through the pattern of the first signal and the time domain length of the first signal; wherein, the first information is used to indicate at least one of the following: the start of the reader-to-device R2D transmission, the start of the R2D preamble transmission, the start of the R2D time acquisition signal transmission, the start of the R2D timing acquisition signal transmission; the first signal includes at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, start indication component of R2D preamble, start indication component of R2D time acquisition signal, start indication component of R2D timing acquisition signal.

[0208] Before receiving the PRDCH sent by the first network element, the device first needs to know the transmission parameters such as the PRDCH or R2D transmission start time, since no SSB is sent in the A-IoT system, and no strict synchronization is established between the device and the first network element. Therefore, a method for notifying the R2D transmission start time information to the device needs to be designed, so that the device can demodulate and decode the PRDCH on the basis of knowing the PRDCH transmission start time information. The present disclosure designs a start indication signal (i.e., the first signal or SIP) to indicate the R2D transmission start time information.

[0209] In this example, the first parameter of the first signal is different from the first parameter of the clock acquisition component CAP or the PRDCH.

[0210] In this example, the first signal has different lengths under different M values, and the M value is the number of chips contained in one OFDM symbol; under different M values, the time domain length of the first signal includes:

[0211] As shown in FIG. 9, M is equal to 2, and the time domain length of the first signal is 2 OFDM symbols;

[0212] As shown in FIG. 10, M is equal to 4, and the time domain length of the first signal is 1 OFDM symbol;

[0213] As shown in FIG. 11, M is equal to 8, and the time domain length of the first signal is 1 / 2 OFDM symbol.

[0214] The SIP time length is different for different M values, and the M value of the SIP is different from the M value of the CAP or the PRDCH, so that the first network element can send the first signal to indicate the R2D transmission start information to the device, so that the device can obtain the R2D transmission start information according to the pattern of the first signal, receive and decode the PRDCH, solve the notification problem of the PRDCH transmission start time, and enable the A-IoT device and the first network element to perform A-IoT communication.

[0215] In scheme 4, the patterns of the first signal corresponding to different first parameters are the same, and the time domain lengths of the first signal corresponding to different first parameters are different.

[0216] In some embodiments, the first parameter of the first signal is the same as the first parameter of the clock acquisition component or the PRDCH.

[0217] In some embodiments, the first signal has different time lengths under different M values, and the M value is the number of chips contained in one OFDM symbol; the time domain length of the first signal under different M values includes at least one of the following:

[0218] M is equal to 1, and the time domain length of the first signal is 6 OFDM symbols;

[0219] M is equal to 2, and the time domain length of the first signal is 3 OFDM symbols;

[0220] M is equal to 4, and the time domain length of the first signal is 1.5 OFDM symbols;

[0221] M is equal to 6, and the time domain length of the first signal is 1 OFDM symbol;

[0222] M is equal to 8, and the time domain length of the first signal is 3 / 4 OFDM symbol;

[0223] M is equal to 12, and the time domain length of the first signal is 1 / 2 OFDM symbol;

[0224] M is equal to 16, and the time domain length of the first signal is 3 / 8 OFDM symbol;

[0225] M is equal to 24, and the time domain length of the first signal is 1 / 4 OFDM symbol;

[0226] M is equal to 32, and the time domain length of the first signal is 3 / 16 OFDM symbol.

[0227] M is equal to 32, and the time domain length of the first signal is 3 / 16 OFDM symbol.

[0228] Example Five

[0229] The first network element indicates first information to the ambient Internet of Things (A-IoT) device through a pattern of the first signal and a time domain length of the first signal; the first information is used to indicate at least one of the following: a start of a Reader-to-Device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal; and the first signal includes at least one of the following: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, and a start indication component of an R2D timing acquisition signal.

[0230] Before receiving the PRDCH sent by the first network element, the device needs to know the transmission parameters such as the start time of the PRDCH or the R2D transmission, since no SSB is sent in the A-IoT system and no strict synchronization is established between the device and the first network element. Therefore, a method for notifying the device of the R2D transmission start time information needs to be designed, so that the device can demodulate and decode the PRDCH on the basis of the PRDCH transmission start time information. The present disclosure designs a start indication signal (i.e., the first signal or SIP) to indicate the R2D transmission start time information.

[0231] In this example, the first parameter of the first signal is the same as the first parameter of the clock acquisition component or the PRDCH.

[0232] In this example, the first signal has different lengths under different M values, and M is the number of chips contained in one OFDM symbol; under different M values, the time domain length of the first signal includes:

[0233] As shown in FIG. 12, M is equal to 2, and the time domain length of the first signal is 3 OFDM symbols.

[0234] As shown in FIG. 13, M is equal to 4, and the time domain length of the first signal is 1.5 OFDM symbols.

[0235] As shown in FIG. 14, M is equal to 8, and the time domain length of the first signal is 3 / 4 OFDM symbols.

[0236] With the above design scheme of the pattern of the first signal, the length of the SIP is different for different M values, and the M value of the SIP is the same as the M value of the CAP or the PRDCH, so that the first network element can indicate the R2D transmission start information to the device by sending the first signal, so that the device can obtain the R2D transmission start information according to the pattern of the first signal, receive and decode the PRDCH, solve the notification problem of the PRDCH transmission start time, and enable the A-IoT device and the first network element to perform A-IoT communication.

[0237] Scheme 5, the patterns of the first signals corresponding to different first parameter sets are the same, and the time domain lengths of the first signals corresponding to different first parameter sets are different.

[0238] In other words, the first parameters are divided into at least two first parameter sets, and the time domain lengths of the first signals are different for the first parameters belonging to different sets. The time domain lengths of the first signals are the same for the first parameters belonging to the same set.

[0239] In the case that all M values are divided into three sets, the time domain lengths of the first signals corresponding to the three sets include at least one of the following:

[0240] In the case that the M value belongs to the first parameter set A, the time domain length of the first signal is 4 OFDM symbols;

[0241] In the case that the M value belongs to the second parameter set B, the time domain length of the first signal is 2 OFDM symbols;

[0242] In the case that the M value belongs to the third parameter set C, the time domain length of the first signal is 1 OFDM symbol.

[0243] Wherein, M is the chip rate.

[0244] Example six

[0245] The first network element indicates the first information to the ambient Internet of Things A-IoT device through the pattern of the first signal and the time domain length of the first signal; wherein, the first information is used to indicate at least one of the following: the start of the reader-to-device R2D transmission, the start of the R2D preamble, the start of the R2D time acquisition signal, the start of the R2D timing acquisition signal; the first signal includes at least one of the following: the R2D preamble, the R2D time acquisition signal, the R2D timing acquisition signal, the start indication component, the start indication component of the R2D preamble, the start indication component of the R2D time acquisition signal, and the start indication component of the R2D timing acquisition signal.

[0246] Before receiving the PRDCH sent by the first network element, the device first needs to know the transmission parameters such as the PRDCH or R2D transmission start time, since no SSB is sent in the A-IoT system, and no strict synchronization is established between the device and the first network element. Therefore, a method for notifying the R2D transmission start time information to the device needs to be designed, so that the device can demodulate and decode the PRDCH on the basis of knowing the PRDCH transmission start time information. The present disclosure designs a start indication signal (i.e., the first signal or SIP) to indicate the R2D transmission start time information.

[0247] In the example, the patterns of the first signals corresponding to different first parameter sets are the same, and the time domain lengths of the first signals corresponding to different first parameter sets are different.

[0248] All candidate M values are divided into three groups, and the M value grouping and the corresponding SIP duration of each group are shown in Table 1, FIG. 15, FIG. 16, and FIG. 17.

[0249] Table 1

[0250] The design scheme of the pattern of the first signal is adopted. For different M value sets, the SIP duration is different, and the M value of the SIP is different from the M value of the CAP or the PRDCH, which can enable the first network element to indicate the R2D transmission start information to the device by sending the first signal, so that the device can obtain the R2D transmission start information according to the pattern of the first signal, receive and decode the PRDCH, solve the notification problem of the PRDCH transmission start time, and enable the A-IoT device and the first network element to perform A-IoT communication.

[0251] Scheme 6: The first network element indicates the first information to A-IoT devices of different device types through different patterns of the first signal according to the device types of the A-IoT devices.

[0252] The device types include at least two of a device type 1, a device type 2a, and a device type 2b.

[0253] In the current technology, A-IoT devices can be divided into the following three types:

[0254] Device type 1 device: peak power consumption is about 1 μW, has energy storage capability, initial sampling frequency offset (SFO) is as high as 10 X (10^X) ppm, and the device has neither DL amplification function nor UL amplification function. The UL transmission of the device is backscattered on an externally provided carrier.

[0255] Device type 2a device: peak power consumption ≤ several hundred μW, has energy storage capability, initial sampling frequency offset (SFO) is as high as 10 X ppm, and the device has DL and / or UL amplification function. The UL transmission of the device is backscattered on an externally provided carrier.

[0256] Device type 2b device: peak power consumption ≤ several hundred μW, has energy storage capability, initial sampling frequency offset (SFO) is as high as 10 X ppm, and the device has DL and / or UL amplification function. The UL transmission of the device is generated internally by the device.

[0257] Example Seven

[0258] The first network element indicates first information to the ambient Internet of Things (A-IoT) device through a pattern of the first signal and / or a time domain length of the first signal; the first information is used to indicate at least one of the following: a start of a Reader-to-Device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal; and the first signal includes at least one of the following: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, and a start indication component of an R2D timing acquisition signal.

[0259] Before receiving the PRDCH sent by the first network element, the device needs to know the transmission parameters such as the start time of the PRDCH or the R2D transmission first, since no SSB is sent in the A-IoT system and no strict synchronization is established between the device and the first network element. Therefore, a method for notifying the device of the R2D transmission start time information needs to be designed, so that the device can demodulate and decode the PRDCH on the basis of the PRDCH transmission start time information. The present disclosure designs a start indication signal (i.e., the first signal or SIP) to indicate the R2D transmission start time information.

[0260] For example, the pattern of the SIP is different for different device types.

[0261] For the device type 1, the SIP pattern is the first pattern.

[0262] For the device type 2a, the SIP pattern is the second pattern.

[0263] For the device type 2b, the SIP pattern is the third pattern.

[0264] With the above design scheme of the pattern of the first signal, the SIP pattern is different for different device types, which can enable the first network element to indicate not only the R2D transmission start information to the device but also the device type to the device by sending the first signal, so that the device can obtain the R2D transmission start information according to the pattern of the first signal, receive and decode the PRDCH, and solve the notification problem of the PRDCH transmission start time, so that the A-IoT device and the first network element can perform A-IoT communication.

[0265] In at least one embodiment of the present disclosure, the method further includes:

[0266] The first network element transmits first control information through the PRDCH after the first signal.

[0267] The first control information is repeatedly transmitted at least twice, or the first control information is channel encoded.

[0268] The first control information includes transport block size information and / or modulation and coding information.

[0269] In some embodiments, the channel encoding includes at least one of a Hamming code, an orthogonal code, and a Simplex code.

[0270] In order for the device to correctly receive data information, the first network element needs to first transmit control information through the PRDCH. However, some control information cannot be protected by cyclic redundancy check (CRC), and therefore the embodiments of the present disclosure further provide that the first control information needs to be transmitted by repetition or channel encoding.

[0271] In the present example, specifically:

[0272] The first network element transmits the first control information through the PRDCH channel after the first signal, and the first control information is repeatedly transmitted at least twice. That is, the first control information is protected by repetition, and the first control information is repeatedly transmitted in the PRDCH, which can improve the reception success rate of the first control information and has less overhead than directly adding CRC.

[0273] The first network element transmits the first control information through the PRDCH channel after the first signal, and the first control information is channel encoded. That is, the first control information is protected by channel encoding, and the first control information is transmitted in the PRDCH by channel encoding, which can improve the reception success rate of the first control information and has less overhead than directly adding CRC.

[0274] In some embodiments, the first control information at least includes transport block size information and / or modulation and coding information.

[0275] The channel encoding includes a Hamming code, an orthogonal code, and a Simplex code, which are all simple error correction codes suitable for decoding by A-IoT devices. Due to the low-power and low-complexity characteristics of A-IoT devices, complex channel encoding can cause the devices to be unable to decode, and therefore only simple channel encoding can be used.

[0276] The above protection scheme for the first control information after the first signal enables the first network element to indicate to the device some control information that cannot use CRC encoding, and to protect the control information by repetition or channel encoding, thereby solving the protection problem of some control information and enabling A-IoT devices and the first network element to perform A-IoT communication.

[0277] In summary, in the embodiments of the present disclosure, the first network element indicates the first information to the A-IoT device through the pattern of the first signal and / or the time domain length of the first signal; the first information is used to indicate at least one of the following: the start of R2D transmission, the start of R2D preamble transmission, the start of R2D time acquisition signal transmission, and the start of R2D timing acquisition signal transmission. Using this information indication method, the first network element can indicate the transmission start and other transmission parameters to the A-IoT device, so that the A-IoT device can receive and decode the PRDCH according to the obtained transmission start information, solve the notification problem of the PRDCH transmission start time, enable the A-IoT device and the first network element to perform A-IoT communication, and improve the flexibility of PRDCH transmission parameter configuration.

[0278] As shown in FIG. 18, the embodiments of the present disclosure also provide an information indication method, which comprises:

[0279] Step 1801: An A-IoT device receives a first signal sent by a first network element;

[0280] Step 1802: The A-IoT device determines first information according to the pattern of the first signal and / or the time domain length of the first signal; wherein,

[0281] The first information is used to indicate at least one of the following: the start of R2D transmission, the start of R2D preamble transmission, the start of R2D time acquisition signal transmission, and the start of R2D timing acquisition signal transmission.

[0282] The first signal comprises at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, start indication component of R2D preamble, start indication component of R2D time acquisition signal, and start indication component of R2D timing acquisition signal.

[0283] As an optional embodiment, the first low voltage transmission or the first high voltage transmission in the pattern of the first signal is a guard interval.

[0284] As an optional embodiment, the pattern of the first signal is different from the pattern of the clock acquisition component;

[0285] Or,

[0286] The pattern of the first signal is different from the pattern of the physical reader-to-device channel (PRDCH).

[0287] As an optional embodiment, the pattern of the first signal comprises at least one of the following:

[0288] at least one high voltage transmission and at least one low voltage transmission;

[0289] at least one low voltage transmission and at least three high voltage transmissions;

[0290] at least one high voltage transmission and at least three low voltage transmissions.

[0291] As an optional embodiment, the pattern of the first signal includes at least one of:

[0292] two low voltage transmissions and three high voltage transmissions;

[0293] two low voltage transmissions and four high voltage transmissions;

[0294] two low voltage transmissions and five high voltage transmissions;

[0295] two high voltage transmissions and three low voltage transmissions;

[0296] two high voltage transmissions and four low voltage transmissions;

[0297] two high voltage transmissions and five low voltage transmissions.

[0298] As an optional embodiment, the combination of high voltage transmissions and low voltage transmissions in the pattern of the first signal includes at least one of:

[0299] a first high voltage transmission, a second low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission;

[0300] a first high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second high voltage transmission;

[0301] a first low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second low voltage transmission;

[0302] a first low voltage transmission, a second high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission;

[0303] a first high voltage transmission, a second low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission;

[0304] a first high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second high voltage transmission;

[0305] a first low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second low voltage transmission;

[0306] a first low voltage transmission, a second high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission;

[0307] a first high voltage transmission, a second low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission;

[0308] a first high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second high voltage transmission;

[0309] a first low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second low voltage transmission;

[0310] a first low voltage transmission, a second high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission;

[0311] wherein the first high voltage transmission is a high voltage transmission with a first duration, the second high voltage transmission is a high voltage transmission with a second duration, the first low voltage transmission is a low voltage transmission with a third duration, and the second low voltage transmission is a low voltage transmission with a fourth duration.

[0312] As an optional embodiment, the first duration, the second duration, the third duration, and the fourth duration correspond to the same length of time.

[0313] Alternatively,

[0314] At least two of the first duration, the second duration, the third duration, and the fourth duration correspond to different lengths of time.

[0315] As an optional embodiment, the patterns of the first signals corresponding to different first parameters are the same, and the time domain lengths of the first signals corresponding to different first parameters are the same.

[0316] As an optional embodiment, the first signal occupies 1 orthogonal frequency division multiplexing (OFDM) symbol.

[0317] Alternatively,

[0318] The first signal occupies at least 2 OFDM symbols.

[0319] As an optional embodiment, the first signal occupies a plurality of OFDM symbols, and the patterns in each OFDM symbol occupied are the same.

[0320] As an optional embodiment, the patterns of the first signals corresponding to different first parameters are the same, and the time domain lengths of the first signals corresponding to different first parameters are different.

[0321] As an optional embodiment, the first parameters of the first signals are different from the first parameters of the clock acquisition component or the PRDCH.

[0322] Or,

[0323] The first parameters of the first signals are the same as the first parameters of the clock acquisition component or the PRDCH.

[0324] As an optional embodiment, the first parameters include at least one of the following:

[0325] Reader-to-device (R2D) chip length, on-off keying (OOK) chip length, device-to-reader (D2R) chip length, chip length of the PRDCH, chip length of the physical device-to-reader channel (PDRCH), R2D chip rate, OOK chip rate, D2R chip rate, chip rate of the PRDCH, chip rate of the PDRCH;

[0326] The chip rate is used to indicate the number of chips contained in one OFDM symbol.

[0327] As an optional embodiment, different first parameters include at least one of the following:

[0328] Different R2D chip lengths;

[0329] Different OOK chip lengths;

[0330] Different D2R chip lengths;

[0331] Different chip rate values.

[0332] As an optional embodiment, the same first parameters include at least one of the following:

[0333] Same R2D chip lengths;

[0334] Same OOK chip lengths;

[0335] Same D2R chip lengths;

[0336] Same chip rate values.

[0337] As an optional embodiment, the time domain length of the first signal includes at least one of the following:

[0338] M is equal to 1, and the time domain length of the first signal is 4 OFDM symbols or 6 OFDM symbols;

[0339] M equals to 2, the time domain length of the first signal is 2 OFDM symbols or 3 OFDM symbols;

[0340] M equals to 4, the time domain length of the first signal is 1 OFDM symbol or 1.5 OFDM symbols;

[0341] M equals to 6, the time domain length of the first signal is 2 / 3 OFDM symbols or 1 OFDM symbol;

[0342] M equals to 8, the time domain length of the first signal is 1 / 2 OFDM symbol or 3 / 4 OFDM symbol;

[0343] M equals to 12, the time domain length of the first signal is 1 / 3 OFDM symbol or 1 / 2 OFDM symbol;

[0344] M equals to 16, the time domain length of the first signal is 1 / 4 OFDM symbol or 3 / 8 OFDM symbol;

[0345] M equals to 24, the time domain length of the first signal is 1 / 6 OFDM symbol or 1 / 4 OFDM symbol;

[0346] M equals to 32, the time domain length of the first signal is 1 / 8 OFDM symbol or 3 / 16 OFDM symbol.

[0347] Wherein, M is a chip rate.

[0348] As an optional embodiment, the patterns of the first signals corresponding to different first parameter sets are the same, and the time domain lengths of the first signals corresponding to different first parameter sets are different.

[0349] As an optional embodiment, the time domain length of the first signal includes at least one of the following:

[0350] In the case that the value of M belongs to the first parameter set A, the time domain length of the first signal is 4 OFDM symbols;

[0351] In the case that the value of M belongs to the second parameter set B, the time domain length of the first signal is 2 OFDM symbols;

[0352] In the case that the value of M belongs to the third parameter set C, the time domain length of the first signal is 1 OFDM symbol.

[0353] Wherein, M is a chip rate.

[0354] As an optional embodiment, the patterns are different, including that the pattern of the first object and the pattern of the second object are different;

[0355] The pattern of the first object and the pattern of the second object are different, comprising:

[0356] The combination of high voltage transmission and low voltage transmission in the first object and the combination of high voltage transmission and low voltage transmission in the second object are different.

[0357] Or,

[0358] The sequence used by the first object and the sequence used by the second object are different.

[0359] As an optional embodiment, the pattern is the same, comprising: the pattern of the first object and the pattern of the second object are the same.

[0360] The pattern of the first object and the pattern of the second object are the same, comprising:

[0361] The combination of high voltage transmission and low voltage transmission in the first object and the combination of high voltage transmission and low voltage transmission in the second object are the same.

[0362] Or,

[0363] The sequence used by the first object and the sequence used by the second object are the same.

[0364] As an optional embodiment, the time domain length of the first object and the time domain length of the second object are the same.

[0365] Or, the time domain length of the first object and the time domain length of the second object are different.

[0366] As an optional embodiment, the first object comprises: any one of the first signal, the clock acquisition component or the PRDCH.

[0367] The second object comprises: any one of the first signal, the clock acquisition component or the PRDCH.

[0368] As an optional embodiment, the pattern of the first signal is: the combination of at least one high voltage transmission and at least one low voltage transmission in the first signal.

[0369] As an optional embodiment, the method further comprises:

[0370] The A-IoT device receives the first control information transmitted by the first network element through the PRDCH after the first signal.

[0371] Wherein, the first control information is repeated at least twice; or the first control information uses channel coding.

[0372] As an optional embodiment, the first control information comprises: transport block size information and / or modulation and coding information.

[0373] As an optional embodiment, the channel coding comprises at least one of the following: Hamming code, orthogonal code, Simplex code.

[0374] To sum up, in the embodiments of the present disclosure, the first network element indicates the first information to the ambient Internet of Things A-IoT device through the pattern of the first signal and / or the time domain length of the first signal; the first information is used to indicate at least one of the following: start of reader-to-device R2D transmission, start of R2D preamble transmission, start of R2D time acquisition signal transmission, and start of R2D timing acquisition signal transmission. Using the information indication method, the first network element can indicate the transmission start and other transmission parameters to the A-IoT device, so that the A-IoT device can receive and decode the PRDCH according to the obtained transmission start information, solve the notification problem of the PRDCH transmission start time, enable the A-IoT device and the first network element to perform A-IoT communication, and improve the flexibility of PRDCH transmission parameter configuration.

[0375] As shown in FIG. 19, the embodiments of the present disclosure also provide a first network element, which comprises a memory 1920, a transceiver 1910, and a processor 1900:

[0376] The memory 1920 is used to store a computer program; the transceiver 1910 is used to transceive data under the control of the processor 1900; and the processor 1900 is used to read the computer program in the memory 1920 and perform the following operations:

[0377] indicate first information to the ambient Internet of Things A-IoT device through the pattern of the first signal and / or the time domain length of the first signal; wherein,

[0378] The first information is used to indicate at least one of the following: start of reader-to-device R2D transmission, start of R2D preamble transmission, start of R2D time acquisition signal transmission, and start of R2D timing acquisition signal transmission.

[0379] The first signal comprises at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, start indication component of R2D preamble, start indication component of R2D time acquisition signal, and start indication component of R2D timing acquisition signal.

[0380] As an optional embodiment, the first low-voltage transmission or the first high-voltage transmission in the pattern of the first signal is a guard interval.

[0381] As an optional embodiment, the pattern of the first signal is different from a pattern of a clock acquisition component;

[0382] or,

[0383] the pattern of the first signal is different from a pattern of a physical reader to device channel (PRDCH).

[0384] As an optional embodiment, the pattern of the first signal comprises at least one of:

[0385] at least one high voltage transmission and at least one low voltage transmission;

[0386] at least one low voltage transmission and at least three high voltage transmissions;

[0387] at least one high voltage transmission and at least three low voltage transmissions.

[0388] As an optional embodiment, the pattern of the first signal corresponding to different first parameters is the same, and the time domain length of the first signal corresponding to different first parameters is the same.

[0389] As an optional embodiment, the first signal occupies one orthogonal frequency division multiplexing (OFDM) symbol;

[0390] or,

[0391] the first signal occupies at least two OFDM symbols.

[0392] As an optional embodiment, the first signal occupies a plurality of OFDM symbols, and the pattern in each OFDM symbol occupied is the same.

[0393] As an optional embodiment, the pattern of the first signal corresponding to different first parameters is the same, and the time domain length of the first signal corresponding to different first parameters is different.

[0394] As an optional embodiment, the first parameter of the first signal is different from a first parameter of a clock acquisition component or a PRDCH;

[0395] or,

[0396] the first parameter of the first signal is the same as a first parameter of a clock acquisition component or a PRDCH.

[0397] As an optional embodiment, the first parameter comprises at least one of:

[0398] Reader-to-device R2D chip length, on-off keying OOK chip length, device-to-reader D2R chip length, chip length of PRDCH, chip length of physical device-to-reader channel PDRCH, R2D chip rate, OOK chip rate, D2R chip rate, chip rate of PRDCH, chip rate of PDRCH;

[0399] The chip rate is used to indicate the number of chips contained in one OFDM symbol.

[0400] As an optional embodiment, the different first parameters include at least one of the following:

[0401] Different R2D chip lengths;

[0402] Different OOK chip lengths;

[0403] Different D2R chip lengths;

[0404] Different chip rate values.

[0405] As an optional embodiment, the same first parameters include at least one of the following:

[0406] Same R2D chip lengths;

[0407] Same OOK chip lengths;

[0408] Same D2R chip lengths;

[0409] Same chip rate values.

[0410] As an optional embodiment, the processor is further configured to read a computer program in the memory and perform the following operations:

[0411] According to the device type of the A-IoT device, the first information is indicated to the A-IoT devices of different device types through different patterns of the first signal.

[0412] As an optional embodiment, the device types include at least two of the following: device type 1, device type 2a, and device type 2b.

[0413] As an optional embodiment, the first network element includes at least one of the following: a base station, a terminal, a reader, and an intermediate node.

[0414] As an optional embodiment, the different patterns include: the pattern of a first object and the pattern of a second object are different;

[0415] The pattern of the first object and the pattern of the second object are different, including:

[0416] The combination of high voltage transmission and low voltage transmission in the first object and the combination of high voltage transmission and low voltage transmission in the second object are different.

[0417] Alternatively,

[0418] The sequence used by the first object and the sequence used by the second object are different.

[0419] As an optional embodiment, the pattern is the same, comprising: the pattern of the first object and the pattern of the second object are the same.

[0420] The pattern of the first object and the pattern of the second object are the same, comprising:

[0421] The combination of high voltage transmission and low voltage transmission in the first object and the combination of high voltage transmission and low voltage transmission in the second object are different.

[0422] Alternatively,

[0423] The sequence used by the first object and the sequence used by the second object are the same.

[0424] As an optional embodiment, the time domain length of the first object and the time domain length of the second object are the same.

[0425] Alternatively, the time domain length of the first object and the time domain length of the second object are different.

[0426] As an optional embodiment, the first object comprises: any one of a first signal, a clock acquisition component or a PRDCH.

[0427] The second object comprises: any one of a first signal, a clock acquisition component or a PRDCH.

[0428] As an optional embodiment, the pattern of the first signal is: the combination of at least one high voltage transmission and at least one low voltage transmission in the first signal.

[0429] As an optional embodiment, the processor is further configured to read a computer program in the memory and perform the following operations:

[0430] The first network element transmits first control information through the PRDCH after the first signal;

[0431] Wherein, the first control information is repeated at least twice; or the first control information is channel encoded.

[0432] As an optional embodiment, the first control information comprises: transport block size information and / or modulation and coding information.

[0433] As an optional embodiment, the channel coding includes at least one of a Hamming code, an orthogonal code, and a Simplex code.

[0434] In FIG. 19, the bus architecture can include any number of interconnecting buses and bridges, depending on the specific application of the processor 1900 and the memory 1920 that are represented by various circuitry linking the processor 1900 and the memory 1920. The bus architecture can also link various other circuitry, such as peripheral devices, voltage regulators, and power management circuitry, all of which are well known in the art, and therefore, will not be further described herein. The bus interface provides an interface. The transceiver 1910 can be a plurality of elements, i.e., including a transmitter and a receiver, which provides a means for communicating with various other apparatus over a transmission medium, including a wireless channel, a wired channel, optical cable, and the like. The processor 1900 is responsible for managing the bus architecture and general processing, and the memory 1920 can store data used by the processor 1900 in executing operations.

[0435] The processor 1900 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD), and the processor can also adopt a multi-core architecture.

[0436] In the embodiments of the present disclosure, the first network element indicates the first information to the A-IoT device through the pattern of the first signal and / or the time domain length of the first signal; the first information is used to indicate at least one of the following: the start of R2D transmission, the start of R2D preamble transmission, the start of R2D time acquisition signal transmission, and the start of R2D timing acquisition signal transmission. Using this information indication method, the first network element can indicate the transmission start and other transmission parameters to the A-IoT device, so that the A-IoT device can receive and decode the PRDCH according to the obtained transmission start information, solve the notification problem of the PRDCH transmission start time, enable the A-IoT device and the first network element to perform A-IoT communication, and improve the flexibility of PRDCH transmission parameter configuration.

[0437] It should be noted that the first network element provided by the embodiments of the present disclosure is a network element capable of performing the above-mentioned information indication method, and all embodiments of the above-mentioned information indication method are applicable to the network element and can achieve the same or similar beneficial effects, which will not be repeated here.

[0438] As shown in FIG. 20, the embodiment of the present disclosure further provides an A-IoT device, comprising a memory 2020, a transceiver 2010, and a processor 2000:

[0439] The memory 2020 is configured to store a computer program; the transceiver 2010 is configured to transceive data under the control of the processor 2000; and the processor 2000 is configured to read the computer program in the memory 2020 and perform the following operations:

[0440] receiving a first signal transmitted by a first network element;

[0441] determining first information according to a pattern of the first signal and / or a time domain length of the first signal; wherein,

[0442] the first information is used to indicate at least one of the following: a start of a reader-to-device (R2D) transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, and a start of an R2D timing acquisition signal;

[0443] the first signal comprises at least one of the following: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, and a start indication component of an R2D timing acquisition signal.

[0444] As an optional embodiment, the first low-voltage transmission or the first high-voltage transmission in the pattern of the first signal is a guard interval.

[0445] As an optional embodiment, the pattern of the first signal is different from a pattern of a clock acquisition component;

[0446] or,

[0447] the pattern of the first signal is different from a pattern of a physical reader-to-device channel (PRDCH).

[0448] As an optional embodiment, the pattern of the first signal comprises at least one of the following:

[0449] at least one high-voltage transmission and at least one low-voltage transmission;

[0450] at least one low-voltage transmission and at least three high-voltage transmissions;

[0451] at least one high-voltage transmission and at least three low-voltage transmissions.

[0452] As an optional embodiment, the patterns of the first signal corresponding to different first parameters are the same, and the time domain lengths of the first signal corresponding to different first parameters are the same.

[0453] As an optional embodiment, the first signal occupies 1 Orthogonal Frequency Division Multiplexing, OFDM, symbol.

[0454] Alternatively,

[0455] The first signal occupies at least 2 OFDM symbols.

[0456] As an optional embodiment, the first signal occupies multiple OFDM symbols, and the pattern in each OFDM symbol occupied is the same.

[0457] As an optional embodiment, the patterns of the first signal corresponding to different first parameters are the same, and the time domain lengths of the first signal corresponding to different first parameters are different.

[0458] As an optional embodiment, the first parameter of the first signal is different from the first parameter of the clock acquisition component or the PRDCH.

[0459] Alternatively,

[0460] The first parameter of the first signal is the same as the first parameter of the clock acquisition component or the PRDCH.

[0461] As an optional embodiment, the first parameter includes at least one of the following:

[0462] Reader-to-device, R2D, chip length, On-Off Keying, OOK, chip length, device-to-reader, D2R, chip length, chip length of the PRDCH, chip length of the Physical Device-to-Reader Channel, PDRCH, R2D chip rate, OOK chip rate, D2R chip rate, chip rate of the PRDCH, chip rate of the PDRCH;

[0463] The chip rate is used to indicate the number of chips contained in one OFDM symbol.

[0464] As an optional embodiment, different first parameters include at least one of the following:

[0465] Different R2D chip lengths;

[0466] Different OOK chip lengths;

[0467] Different D2R chip lengths;

[0468] Different chip rate values.

[0469] As an optional embodiment, the same first parameter includes at least one of the following:

[0470] Same R2D chip length;

[0471] the same OOK chip length;

[0472] the same D2R chip length;

[0473] the same chip rate value.

[0474] as an optional embodiment, the patterns are different, including: the pattern of the first object and the pattern of the second object are different;

[0475] the pattern of the first object and the pattern of the second object are different, including:

[0476] the combination of high voltage transmission and low voltage transmission in the first object and the combination of high voltage transmission and low voltage transmission in the second object are different;

[0477] or,

[0478] the sequence used by the first object and the sequence used by the second object are different.

[0479] as an optional embodiment, the patterns are the same, including: the pattern of the first object and the pattern of the second object are the same;

[0480] the pattern of the first object and the pattern of the second object are the same, including:

[0481] the combination of high voltage transmission and low voltage transmission in the first object and the combination of high voltage transmission and low voltage transmission in the second object are the same;

[0482] or,

[0483] the sequence used by the first object and the sequence used by the second object are the same.

[0484] as an optional embodiment, the time domain length of the first object and the time domain length of the second object are the same;

[0485] or, the time domain length of the first object and the time domain length of the second object are different.

[0486] as an optional embodiment, the first object includes: any one of the first signal, the clock acquisition component or the PRDCH;

[0487] the second object includes: any one of the first signal, the clock acquisition component or the PRDCH.

[0488] as an optional embodiment, the pattern of the first signal is: the combination of at least one high voltage transmission and at least one low voltage transmission in the first signal.

[0489] As an optional embodiment, the processor is further configured to read a computer program in the memory and perform the following operations:

[0490] receiving first control information of the PRDCH transmission after the first signal by the first network element;

[0491] wherein the first control information is repeatedly transmitted at least twice; or the first control information is channel encoded.

[0492] As an optional embodiment, the first control information comprises: transport block size information and / or modulation and coding information.

[0493] As an optional embodiment, the channel encoding comprises at least one of: Hamming code, orthogonal code, Simplex code.

[0494] In FIG. 20, the bus architecture can include any number of interconnected buses and bridges, which link various circuits together, including the processor 2000 and the memory 2020. The bus architecture can also link various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus will not be described further. The bus interface provides an interface. The transceiver 2010 can be a plurality of elements, including a transmitter and a receiver, which provide a means for communicating with various other apparatuses over a transmission medium, including wireless channels, wired channels, optical cables, and the like. The processor 2000 is responsible for managing the bus architecture and general processing, and the memory 2020 can store data used by the processor 2000 in executing operations.

[0495] The processor 2000 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0496] In the embodiments of the present disclosure, the first network element indicates first information to the ambient Internet of Things (A-IoT) device through a pattern of the first signal and / or a time domain length of the first signal; the first information is used to indicate at least one of the following: a transmission start of a Reader-to-Device (R2D), a transmission start of an R2D preamble, a transmission start of an R2D time acquisition signal, and a transmission start of an R2D timing acquisition signal. Using the information indication method, the first network element can indicate transmission parameters such as the transmission start to the A-IoT device, so that the A-IoT device can receive and decode the Physical Reader-to-Device Channel (PRDCH) according to the obtained transmission start information, solve the notification problem of the PRDCH transmission start time, enable the A-IoT device and the first network element to perform A-IoT communication, and improve the flexibility of PRDCH transmission parameter configuration.

[0497] It should be noted that the A-IoT device provided in the embodiments of the present disclosure is an A-IoT device capable of performing the above information indication method, and all embodiments of the information indication method are applicable to the A-IoT device and can achieve the same or similar beneficial effects, which will not be repeated here.

[0498] As shown in FIG. 21, the embodiments of the present disclosure also provide an information indication device, which comprises:

[0499] An indication unit 2101 is configured to indicate first information to the ambient Internet of Things (A-IoT) device through a pattern of the first signal and / or a time domain length of the first signal; wherein,

[0500] The first information is used to indicate at least one of the following: a transmission start of a Reader-to-Device (R2D), a transmission start of an R2D preamble, a transmission start of an R2D time acquisition signal, and a transmission start of an R2D timing acquisition signal.

[0501] The first signal comprises at least one of the following: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, and a start indication component of an R2D timing acquisition signal.

[0502] As an optional embodiment, the first low voltage transmission or the first high voltage transmission in the pattern of the first signal is a guard interval.

[0503] As an optional embodiment, the pattern of the first signal is different from a pattern of a clock acquisition component.

[0504] Or,

[0505] The pattern of the first signal is different from a pattern of a Physical Reader-to-Device Channel (PRDCH).

[0506] As an optional embodiment, the pattern of the first signal comprises at least one of the following:

[0507] at least one high-voltage transmission and at least one low-voltage transmission;

[0508] at least one low-voltage transmission and at least three high-voltage transmissions;

[0509] at least one high-voltage transmission and at least three low-voltage transmissions.

[0510] As an optional embodiment, the patterns of the first signals corresponding to different first parameters are the same, and the time domain lengths of the first signals corresponding to different first parameters are the same.

[0511] As an optional embodiment, the first signal occupies one orthogonal frequency division multiplexing (OFDM) symbol.

[0512] Alternatively,

[0513] The first signal occupies at least two OFDM symbols.

[0514] As an optional embodiment, the first signal occupies multiple OFDM symbols, and the patterns in each OFDM symbol occupied are the same.

[0515] As an optional embodiment, the patterns of the first signals corresponding to different first parameters are the same, and the time domain lengths of the first signals corresponding to different first parameters are different.

[0516] As an optional embodiment, the first parameter of the first signal is different from the first parameter of the clock acquisition component or the PRDCH.

[0517] Alternatively,

[0518] The first parameter of the first signal is the same as the first parameter of the clock acquisition component or the PRDCH.

[0519] As an optional embodiment, the first parameter comprises at least one of the following:

[0520] Reader-to-device (R2D) chip length, on-off keying (OOK) chip length, device-to-reader (D2R) chip length, chip length of PRDCH, chip length of physical device-to-reader channel (PDRCH), R2D chip rate, OOK chip rate, D2R chip rate, chip rate of PRDCH, chip rate of PDRCH;

[0521] The chip rate is used to indicate the number of chips contained in one OFDM symbol.

[0522] As an optional embodiment, different first parameters comprise at least one of the following:

[0523] different R2D chip lengths;

[0524] different OOK chip lengths;

[0525] different D2R chip lengths;

[0526] different chip rate values.

[0527] As an optional embodiment, the same first parameter comprises at least one of:

[0528] same R2D chip lengths;

[0529] same OOK chip lengths;

[0530] same D2R chip lengths;

[0531] same chip rate values.

[0532] As an optional embodiment, the indicating unit comprises:

[0533] a first indicating sub-unit, configured to indicate the first information to A-IoT devices of different device types through different patterns of the first signal according to device types of the A-IoT devices.

[0534] As an optional embodiment, the device types comprise at least two of device type 1, device type 2a and device type 2b.

[0535] As an optional embodiment, the first network element comprises at least one of a base station, a terminal, a reader and an intermediate node.

[0536] As an optional embodiment, the different patterns comprise that a pattern of the first object and a pattern of the second object are different.

[0537] The first object and the second object are different in that:

[0538] the combination of high voltage transmission and low voltage transmission in the first object and the combination of high voltage transmission and low voltage transmission in the second object are different;

[0539] or,

[0540] the sequence used by the first object and the sequence used by the second object are different.

[0541] As an optional embodiment, the same patterns comprise that the pattern of the first object and the pattern of the second object are the same.

[0542] The first object and the second object are the same in that:

[0543] the combination of high voltage transmission and low voltage transmission in the first object is the same as the combination of high voltage transmission and low voltage transmission in the second object;

[0544] or,

[0545] the sequence used by the first object is the same as the sequence used by the second object.

[0546] As an optional embodiment, the time domain length of the first object is the same as the time domain length of the second object.

[0547] or, the time domain length of the first object is different from the time domain length of the second object.

[0548] As an optional embodiment, the first object comprises any one of the following: a first signal, a clock acquisition component or a PRDCH.

[0549] The second object comprises any one of the following: a first signal, a clock acquisition component or a PRDCH.

[0550] As an optional embodiment, the pattern of the first signal is a combination of at least one high voltage transmission and at least one low voltage transmission in the first signal.

[0551] As an optional embodiment, the apparatus further comprises:

[0552] a transmission unit configured to transmit first control information through a PRDCH after the first signal;

[0553] wherein the first control information is repeatedly transmitted at least twice; or the first control information is channel encoded.

[0554] As an optional embodiment, the first control information comprises the following: transport block size information and / or modulation and coding information.

[0555] As an optional embodiment, the channel encoding comprises at least one of the following: Hamming code, orthogonal code, Simplex code.

[0556] In the embodiments of the present disclosure, the first network element indicates the first information to the A-IoT device through the pattern of the first signal and / or the time domain length of the first signal; the first information is used to indicate at least one of the following: the start of R2D transmission, the start of R2D preamble transmission, the start of R2D time acquisition signal transmission, and the start of R2D timing acquisition signal transmission. Using this information indication method, the first network element can indicate the transmission start and other transmission parameters to the A-IoT device, so that the A-IoT device can receive and decode the PRDCH according to the obtained transmission start information, solve the notification problem of the PRDCH transmission start time, enable the A-IoT device and the first network element to perform A-IoT communication, and improve the flexibility of PRDCH transmission parameter configuration.

[0557] It should be noted that the device provided by the embodiments of the present disclosure is a device capable of executing the above-mentioned information indication method, and all embodiments of the above-mentioned information indication method are applicable to the device, and can achieve the same or similar beneficial effects, which will not be repeated here.

[0558] As shown in FIG. 22, the embodiments of the present disclosure also provide an information indication device, which comprises:

[0559] The receiving unit 2201 is configured to receive the first signal sent by the first network element;

[0560] The determining unit 2202 is configured to determine the first information according to the pattern of the first signal and / or the time domain length of the first signal; wherein,

[0561] The first information is used to indicate at least one of the following: the start of R2D transmission, the start of R2D preamble transmission, the start of R2D time acquisition signal transmission, and the start of R2D timing acquisition signal transmission.

[0562] The first signal comprises at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, start indication component of R2D preamble, start indication component of R2D time acquisition signal, and start indication component of R2D timing acquisition signal.

[0563] As an optional embodiment, the first low-voltage transmission or the first high-voltage transmission in the pattern of the first signal is a guard interval.

[0564] As an optional embodiment, the pattern of the first signal is different from the pattern of the clock acquisition component;

[0565] Or,

[0566] The pattern of the first signal is different from the pattern of the physical reader-to-device channel PRDCH.

[0567] As an optional embodiment, the pattern of the first signal comprises at least one of:

[0568] at least one high-voltage transmission and at least one low-voltage transmission;

[0569] at least one low-voltage transmission and at least three high-voltage transmissions;

[0570] at least one high-voltage transmission and at least three low-voltage transmissions.

[0571] As an optional embodiment, the patterns of the first signals corresponding to different first parameters are the same, and the time domain lengths of the first signals corresponding to different first parameters are the same.

[0572] As an optional embodiment, the first signal occupies one orthogonal frequency division multiplexing (OFDM) symbol.

[0573] Alternatively,

[0574] the first signal occupies at least two OFDM symbols.

[0575] As an optional embodiment, the first signal occupies multiple OFDM symbols, and the patterns in each of the occupied OFDM symbols are the same.

[0576] As an optional embodiment, the patterns of the first signals corresponding to different first parameters are the same, and the time domain lengths of the first signals corresponding to different first parameters are different.

[0577] As an optional embodiment, the first parameter of the first signal is different from the first parameter of the clock acquisition component or the PRDCH.

[0578] Alternatively,

[0579] the first parameter of the first signal is the same as the first parameter of the clock acquisition component or the PRDCH.

[0580] As an optional embodiment, the first parameter comprises at least one of:

[0581] reader-to-device (R2D) chip length, on-off keying (OOK) chip length, device-to-reader (D2R) chip length, chip length of the PRDCH, chip length of the physical device-to-reader channel (PDRCH), R2D chip rate, OOK chip rate, D2R chip rate, chip rate of the PRDCH, chip rate of the PDRCH;

[0582] wherein the chip rate is used to indicate the number of chips contained in one OFDM symbol.

[0583] As an optional embodiment, the different first parameters include at least one of:

[0584] different R2D chip lengths;

[0585] different OOK chip lengths;

[0586] different D2R chip lengths;

[0587] different chip rate values.

[0588] As an optional embodiment, the same first parameters include at least one of:

[0589] same R2D chip lengths;

[0590] same OOK chip lengths;

[0591] same D2R chip lengths;

[0592] same chip rate values.

[0593] As an optional embodiment, the pattern is different, including: the pattern of the first object and the pattern of the second object are different;

[0594] the pattern of the first object and the pattern of the second object being different includes:

[0595] a combination of high voltage transmissions and low voltage transmissions in the first object and a combination of high voltage transmissions and low voltage transmissions in the second object are different;

[0596] or,

[0597] a sequence used by the first object and a sequence used by the second object are different.

[0598] As an optional embodiment, the pattern is the same, including: the pattern of the first object and the pattern of the second object are the same;

[0599] the pattern of the first object and the pattern of the second object being the same includes:

[0600] a combination of high voltage transmissions and low voltage transmissions in the first object and a combination of high voltage transmissions and low voltage transmissions in the second object are the same;

[0601] or,

[0602] a sequence used by the first object and a sequence used by the second object are the same.

[0603] As an optional embodiment, a time domain length of the first object and a time domain length of the second object are the same;

[0604] Alternatively, the time domain length of the first object and the time domain length of the second object are different.

[0605] As an optional embodiment, the first object comprises any one of the following: the first signal, the clock acquisition component, or the PRDCH.

[0606] The second object comprises any one of the following: the first signal, the clock acquisition component, or the PRDCH.

[0607] As an optional embodiment, the pattern of the first signal is a combination of at least one high-voltage transmission and at least one low-voltage transmission in the first signal.

[0608] As an optional embodiment, the apparatus further comprises:

[0609] The information receiving unit is configured to receive first control information transmitted by the first network element through the PRDCH after the first signal.

[0610] The first control information is repeatedly transmitted at least twice, or the first control information is channel encoded.

[0611] As an optional embodiment, the first control information comprises the following: transport block size information and / or modulation and coding information.

[0612] As an optional embodiment, the channel encoding comprises at least one of the following: Hamming code, orthogonal code, and Simplex code.

[0613] In the embodiments of the present disclosure, the first network element indicates first information to the A-IoT device through the pattern of the first signal and / or the time domain length of the first signal; the first information is used to indicate at least one of the following: the start of R2D transmission, the start of R2D preamble transmission, the start of R2D time acquisition signal transmission, and the start of R2D timing acquisition signal transmission. Using this information indication method, the first network element can indicate transmission parameters such as transmission start to the A-IoT device, so that the A-IoT device can receive and decode the PRDCH according to the obtained transmission start information, solve the notification problem of the PRDCH transmission start time, enable the A-IoT device and the first network element to perform A-IoT communication, and improve the flexibility of PRDCH transmission parameter configuration.

[0614] It should be noted that the apparatus provided by the embodiments of the present disclosure is an apparatus capable of executing the above-mentioned information indication method, and all embodiments of the above-mentioned information indication method are applicable to the apparatus and can achieve the same or similar beneficial effects, which will not be repeated here.

[0615] It should be further explained that the division of units in the embodiments of the present disclosure is illustrative, and is only a logical function division. In actual implementation, another division manner can be used. In addition, each functional unit in each embodiment of the present disclosure can be integrated in one processing unit, or each unit can exist physically independently, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0616] When the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, the integrated unit can be stored in a processor-readable storage medium. Based on this understanding, the technical solutions of the present disclosure, essentially or in other words, the part that contributes to the related art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in each embodiment of the present disclosure. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0617] The embodiment of the present disclosure further provides a processor-readable storage medium, which stores a computer program. The computer program is used for causing the processor to execute each process in the method embodiment and achieve the same technical effects. To avoid repetition, details are not described herein. The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to a magnetic memory (for example, a floppy disk, a hard disk, a magnetic tape, a magneto optical disk (MO) and the like), an optical memory (for example, a compact disc (CD), a digital video disc (DVD), a Blu-ray disc (BD), a high-definition versatile disc (HVD) and the like), and a semiconductor memory (for example, a ROM, an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a non-volatile memory (NAND (Non-volatile Memory Device) FLASH), a solid state disk (SSD)) and the like.

[0618] The embodiment of the present disclosure further provides a computer program product, which includes computer instructions. When the computer instructions are executed by a processor, each process in the method embodiment and the same technical effects can be achieved. To avoid repetition, details are not described herein.

[0619] Those skilled in the art should understand that the embodiments of the present disclosure can be provided as a method, a system or a computer program product. Therefore, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present disclosure can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to a magnetic disk memory and an optical memory) containing computer-usable program code.

[0620] The computer executable instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0621] These processor-executable instructions can also be stored in a processor-readable memory that can direct the computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks.

[0622] These processor-executable instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0623] Further, it is noted that in the apparatuses and methods of this disclosure, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered equivalents of this disclosure. Moreover, the steps for performing the above series of processes can be executed in a time sequence naturally according to the order of description, but do not necessarily have to be executed in a time sequence, and some steps can be executed in parallel or independently of each other. It can be understood by those of ordinary skill in the art that all or any steps or components of the methods and apparatuses of this disclosure can be implemented in hardware, firmware, software, or a combination thereof in any computing device (including processors, storage media, etc.) or network of computing devices, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of this disclosure.

[0624] It should be noted that the division of the above various modules is only a logical functional division, and all or part of them can be integrated into one physical entity or physically separated in actual implementation. These modules can all be implemented in the form of software called by a processing element; all be implemented in the form of hardware; or part of the modules be implemented in the form of software called by a processing element, and part of the modules be implemented in the form of hardware. For example, a certain module can be a separately established processing element, or be integrated in a certain chip of the above device, and in addition, it can be stored in the form of program code in the memory of the above device, and be called and executed by a certain processing element of the above device to determine the function of the above module. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together or independently implemented. The processing element described herein can be an integrated circuit with signal processing capability. In the implementation process, the steps of the above method or the above various modules can be completed by the integrated logic circuit of hardware in the processor element or the instruction in the form of software.

[0625] For example, each module, unit, sub-unit or sub-module can be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASICs), or one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), etc. For another example, when a certain module above is implemented in the form of program code called by a processing element, the processing element can be a general purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules can be integrated together to implement in the form of system on a chip (SOC).

[0626] The terms "first", "second", and the like in the specification and claims of the present disclosure are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the disclosure described herein, such as the order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0627] Obviously, numerous modifications and variations of the present disclosure are possible in light of the above teachings. It is therefore to be understood that within the scope of the present disclosure, the disclosure and various embodiments can be practiced otherwise than as specifically described.

Claims

1. A method of information indication, the method comprising: a first network element indicating a first information to an Ambient Internet of Things, A-IoT, device through a pattern of a first signal and / or a time domain length of the first signal; wherein, the first information is used to indicate at least one of: a start of a Reader-to-Device, R2D, transmission, a start of a R2D preamble, a start of a R2D time acquisition signal, a start of a R2D timing acquisition signal; the first signal comprises at least one of: a R2D preamble, a R2D time acquisition signal, a R2D timing acquisition signal, a start indication component, a start indication component of a R2D preamble, a start indication component of a R2D time acquisition signal, a start indication component of a R2D timing acquisition signal.

2. The method of claim 1, wherein, a first low voltage transmission or a first high voltage transmission in the pattern of the first signal is a guard interval.

3. The method of claim 1, wherein, the pattern of the first signal is different from a pattern of a clock acquisition component; or, the pattern of the first signal is different from a pattern of a Physical Reader-to-Device Channel, PRDCH.

4. The method of claim 1, wherein, the pattern of the first signal comprises at least one of: at least 1 high voltage transmission and at least 1 low voltage transmission; at least 1 low voltage transmission and at least 3 high voltage transmissions; at least 1 high voltage transmission and at least 3 low voltage transmissions.

5. The method of claim 1, wherein, the pattern of the first signal comprises at least one of: 2 low voltage transmissions and 3 high voltage transmissions; 2 low voltage transmissions and 4 high voltage transmissions; 2 low voltage transmissions and 5 high voltage transmissions; 2 high voltage transmissions and 3 low voltage transmissions; 2 high voltage transmissions and 4 low voltage transmissions; 2 high voltage transmissions and 5 low voltage transmissions.

6. The method of claim 1, wherein, a combination of high voltage transmissions and low voltage transmissions in the pattern of the first signal comprises at least one of: a first high voltage transmission, a second low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission; a first high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second high voltage transmission; a first low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second low voltage transmission; a first low voltage transmission, a second high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission; a first high voltage transmission, a second low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission; a first high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second high voltage transmission; a first low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second low voltage transmission; a first low voltage transmission, a second high voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission, a second low voltage transmission; a first high voltage transmission, a second low voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission, a second high voltage transmission; a first high-voltage transmission, a second low-voltage transmission, a second low-voltage transmission, a second low-voltage transmission, a second low-voltage transmission, a second low-voltage transmission, a second high-voltage transmission; a first low-voltage transmission, a second high-voltage transmission, a second high-voltage transmission, a second high-voltage transmission, a second high-voltage transmission, a second high-voltage transmission, a second low-voltage transmission; a first low-voltage transmission, a second high-voltage transmission, a second low-voltage transmission, a second low-voltage transmission, a second low-voltage transmission, a second low-voltage transmission, a second low-voltage transmission; The first time length, the second time length, the third time length, and the fourth time length correspond to the same time length.

7. The method of claim 6, wherein, Alternatively, The first time length, the second time length, the third time length, and the fourth time length correspond to different time lengths.

8. The method of claim 1, wherein The first signals corresponding to different first parameters have the same pattern and the same time domain length.

9. The method of claim 1, wherein The first signal occupies 1 orthogonal frequency division multiplexing (OFDM) symbol. Alternatively, The first signal occupies at least 2 OFDM symbols.

10. The method of claim 9, wherein The first signal occupies multiple OFDM symbols, and the pattern in each occupied OFDM symbol is the same.

11. The method of claim 1, wherein The first signals corresponding to different first parameters have the same pattern and different time domain lengths.

12. The method of claim 1, wherein The first parameter of the first signal is different from the first parameter of the clock acquisition component or the PRDCH. Alternatively, The first parameter of the first signal is the same as the first parameter of the clock acquisition component or the PRDCH. The first parameter includes at least one of the following:

13. The method of claim 8 or 11 or 12, wherein, reader-to-device (R2D) chip length, on-off keying (OOK) chip length, device-to-reader (D2R) chip length, chip length of the PRDCH, chip length of the physical device-to-reader channel (PDRCH), R2D chip rate, OOK chip rate, D2R chip rate, chip rate of the PRDCH, chip rate of the PDRCH; The chip rate is used to indicate the number of chips contained in one OFDM symbol. Different first parameters include at least one of the following:

14. The method of claim 13, wherein, different R2D chip lengths; different OOK chip lengths; different D2R chip lengths; different chip rate values. Same first parameters include at least one of the following:

15. The method of claim 13, wherein, same R2D chip lengths; same OOK chip lengths; same D2R chip lengths; same chip rate values. The time domain length of the first signal includes at least one of the following:

16. The method of claim 11, wherein, ​ M equals 1, a time domain length of the first signal is 4 OFDM symbols or 6 OFDM symbols; M equals 2, a time domain length of the first signal is 2 OFDM symbols or 3 OFDM symbols; M equals 4, a time domain length of the first signal is 1 OFDM symbol or 1.5 OFDM symbols; M equals 6, a time domain length of the first signal is 2 / 3 OFDM symbol or 1 OFDM symbol; M equals 8, a time domain length of the first signal is 1 / 2 OFDM symbol or 3 / 4 OFDM symbol; M equals 12, a time domain length of the first signal is 1 / 3 OFDM symbol or 1 / 2 OFDM symbol; M equals 16, a time domain length of the first signal is 1 / 4 OFDM symbol or 3 / 8 OFDM symbol; M equals 24, a time domain length of the first signal is 1 / 6 OFDM symbol or 1 / 4 OFDM symbol; M equals 32, a time domain length of the first signal is 1 / 8 OFDM symbol or 3 / 16 OFDM symbol; wherein M is a chip rate.

17. The method of claim 11, wherein, the pattern of the first signal corresponding to different first parameter sets is same, and a time domain length of the first signal corresponding to different first parameter sets is different.

18. The method of claim 17, wherein, the time domain length of the first signal comprises at least one of: in a case that the value of M belongs to a first parameter set A, the time domain length of the first signal is 4 OFDM symbols; in a case that the value of M belongs to a second parameter set B, the time domain length of the first signal is 2 OFDM symbols; in a case that the value of M belongs to a third parameter set C, the time domain length of the first signal is 1 OFDM symbol; wherein M is a chip rate.

19. The method of any one of claims 1-7, wherein, the first network element indicates the first information to the A-IoT device through the pattern of the first signal, comprising: the first network element indicates the first information to A-IoT devices of different device types through different patterns of the first signal according to the device types of the A-IoT devices.

20. The method of claim 19, wherein, the device types comprise at least two of a device type 1, a device type 2a and a device type 2b.

21. The method of claim 1, wherein, the first network element comprises at least one of a base station, a terminal, a reader and an intermediate node.

22. The method of any one of claims 1-21, wherein, the patterns are different, comprising that a pattern of a first object and a pattern of a second object are different; the patterns of the first object and the second object being different comprises: a combination of high voltage transmission and low voltage transmission in the first object and a combination of high voltage transmission and low voltage transmission in the second object are different; or, a sequence used by the first object and a sequence used by the second object are different.

23. The method of any one of claims 1-21, wherein, the patterns are same, comprising that a pattern of a first object and a pattern of a second object are same; the patterns of the first object and the second object being same comprises: a combination of high voltage transmission and low voltage transmission in the first object and a combination of high voltage transmission and low voltage transmission in the second object are same; or, a sequence used by the first object and a sequence used by the second object are same.

24. The method of claim 22 or 23, wherein, The time domain length of the first object and the time domain length of the second object are the same. Alternatively, the time domain length of the first object and the time domain length of the second object are different.

25. The method of any one of claims 22-24, wherein, The first object comprises any one of the following: a first signal, a clock acquisition component, or a PRDCH. The second object comprises any one of the following: a first signal, a clock acquisition component, or a PRDCH.

26. The method of any one of claims 1-25, wherein, The pattern of the first signal is a combination of at least one high voltage transmission and at least one low voltage transmission in the first signal.

27. The method of claim 1, further comprising: The first network element transmits first control information through the PRDCH after the first signal; wherein the first control information is repeatedly transmitted at least twice; or the first control information is channel encoded.

28. The method of claim 27, wherein, The first control information comprises at least one of the following: transport block size information and / or modulation and coding information.

29. The method of claim 27, wherein, The channel encoding comprises at least one of the following: Hamming code, orthogonal code, and Simplex code.

30. An information indication method, comprising: An A-IoT device receives a first signal transmitted by a first network element; The A-IoT device determines first information according to the pattern of the first signal and / or the time domain length of the first signal; wherein, The first information is used to indicate at least one of the following: the start of reader-to-device (R2D) transmission, the start of R2D preamble, the start of R2D time acquisition signal, and the start of R2D timing acquisition signal. The first signal comprises at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, start indication component of R2D preamble, start indication component of R2D time acquisition signal, and start indication component of R2D timing acquisition signal.

31. The method of claim 30, further comprising: The A-IoT device receives first control information transmitted by the first network element through the PRDCH after the first signal; wherein the first control information is repeatedly transmitted at least twice; or the first control information is channel encoded.

32. A first network element, comprising a memory, a transceiver, and a processor: The memory is used to store a computer program; the transceiver is used to transceive data under the control of the processor; and the processor is used to read the computer program in the memory and perform the following operations: The first information is used to indicate at least one of the following: the start of reader-to-device (R2D) transmission, the start of R2D preamble, the start of R2D time acquisition signal, and the start of R2D timing acquisition signal. The first signal comprises at least one of the following: R2D preamble, R2D time acquisition signal, R2D timing acquisition signal, start indication component, start indication component of R2D preamble, start indication component of R2D time acquisition signal, and start indication component of R2D timing acquisition signal. ​ 33.An A-IoT device, comprising a memory, a transceiver, a processor: a memory, configured to store a computer program; a transceiver, configured to transceive data under control of the processor; and a processor, configured to read the computer program in the memory and perform the following operations: receiving a first signal transmitted by a first network element; determining first information according to a pattern of the first signal and / or a time domain length of the first signal; wherein the first information is used to indicate at least one of: a start of a Reader-to-Device, R2D, transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, a start of an R2D timing acquisition signal; the first signal comprises at least one of: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, a start indication component of an R2D timing acquisition signal. 34.An information indication apparatus, comprising: an indication unit, configured to indicate first information to an Ambient Internet of Things, A-IoT, device through a pattern of a first signal and / or a time domain length of the first signal; wherein the first information is used to indicate at least one of: a start of a Reader-to-Device, R2D, transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, a start of an R2D timing acquisition signal; the first signal comprises at least one of: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, a start indication component of an R2D timing acquisition signal. 35.An information indication apparatus, comprising: a receiving unit, configured to receive a first signal transmitted by a first network element; a determining unit, configured to determine first information according to a pattern of the first signal and / or a time domain length of the first signal; wherein the first information is used to indicate at least one of: a start of a Reader-to-Device, R2D, transmission, a start of an R2D preamble, a start of an R2D time acquisition signal, a start of an R2D timing acquisition signal; the first signal comprises at least one of: an R2D preamble, an R2D time acquisition signal, an R2D timing acquisition signal, a start indication component, a start indication component of an R2D preamble, a start indication component of an R2D time acquisition signal, a start indication component of an R2D timing acquisition signal. 36.A processor readable storage medium, storing a program, the program being used to make the processor execute the method in any one of claims 1 to 29, or make the processor execute the method in claim 30 or 31.

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