WO2025166708A1 - Signal sending method, signal receiving method, and apparatus - Google Patents

Abstract

Embodiments of the present application provide a signal sending method, a signal receiving method, an apparatus, and a communication system. The signal sending method comprises: a terminal device receives first information sent by a network device, the first information at least comprising first indication information used for indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information used for indicating a second time domain resource and/or a second frequency domain resource; and sends a second signal on the first time domain resource and/or the first frequency domain resource, and/or backscatters a first waveform on the second time domain resource and/or the second frequency domain resource, the second signal being a signal formed by the terminal device by means of backscattering the first waveform or being a signal autonomously generated by the terminal device.

Description

Signal sending method, signal receiving method and device Technical Field

The present application relates to the field of communication technology.

Background Art

From the 2G era to the early days of the 4G system, cellular mobile communication systems primarily served mobile phones—mobile terminal devices held by people. With the rapid development of the mobile Internet and the Internet of Things (IoT), starting in the late 4G era and continuing to this day, the technological evolution of cellular mobile communication systems has considered and supported an increasingly diverse range of IoT application scenarios. Consequently, a wider variety of IoT device types have been supported and implemented in actual network deployments and service applications, including enhanced Machine-Type Communication (eMTC) devices, Narrowband Internet of Things (NB-IoT) devices, and Reduced Capability (RedCap) devices. With the increasing diversity of IoT terminal devices, cellular mobile systems have increasingly enhanced their capabilities for providing services and services tailored to vertical industries.

However, among the vast number of IoT devices, cellular mobile communication systems still lack the ability to support a large number of lower-cost IoT terminals. To provide more robust, reliable, and complete IoT application solutions, supporting these lower-cost IoT terminals within 3GPP cellular mobile systems has become a pressing issue.

It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

Summary of the Invention

The Radio Frequency Identification (RFID) system is a solution for the field of IoT terminal devices with a large number and lower cost. The RFID system is widely used. The advantages of the RFID system are low tag cost and low price. RFID tags are small in size and have fewer restrictions on the size and material of the items they are used for, so they are easier to use in various scenarios such as item management and item tracking. One disadvantage of the RFID system is that the information reading range of the RFID tag (based on the communication range of the wireless signal) is small. When using a manual handheld tag reader solution, labor costs may become the main expense of the cost of use. Using a dedicated RFID port or gateway to read and manage RFID tags requires higher deployment costs. In addition, the logical architecture of the RFID system is simple and cannot be used. Interference in radio wave transmission is better coordinated, so system capacity and spectrum utilization efficiency are generally low.

Compared to RFID systems, support for tag-based terminal devices in 3GPP's 5G system allows the reuse of existing base station deployments and supports industry applications based on these devices through existing cellular mobile communication networks, effectively reducing deployment and usage costs. 3GPP's 5G system provides reliable authentication, network coordination, and accurate and stable terminal device management mechanisms. This can also be used to optimize the network, increasing system capacity and spectrum efficiency.

As a new type of IoT terminal in the 5G system, tag-type terminal devices (Ambient IoT devices) are severely cost-constrained. Their hardware capabilities are significantly weaker than those of standard smartphones and other IoT devices supported by existing cellular mobile communication systems. For example, tag-type terminal devices have very limited signal processing capabilities, and their onboard crystal oscillators can have large errors. This makes the resource scheduling methods between terminal devices and base stations (network equipment) in existing 5G systems unreusable. Therefore, how to implement resource scheduling for signal transmission by tag-type terminal devices has become a pressing issue.

In response to at least one of the above problems, embodiments of the present application provide a signal sending method, a signal receiving method, an apparatus, and a communication system.

According to another aspect of an embodiment of the present application, a signal sending device is provided, which is applied to a terminal device, including:

A receiving unit, configured to receive first information sent by a network device; wherein the first information includes at least first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information for indicating a second time domain resource and/or a second frequency domain resource;

a transmitting unit that sends a second signal on the first time domain resource and/or the first frequency domain resource, and/or backscatters a first waveform on the second time domain resource and/or the second frequency domain resource; the second signal is a signal formed by the terminal device by backscattering the first waveform or a signal autonomously generated by the terminal device

According to another aspect of an embodiment of the present application, a signal receiving apparatus is provided, which is applied to a network device, including:

A transmitting unit, which sends first information to a terminal device; wherein the first information includes at least first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information for indicating a second time domain resource and/or a second frequency domain resource;

A receiving unit, which receives a second signal sent by the terminal device on the first time domain resource and/or the first frequency domain resource; the second signal is a signal formed by the terminal device through backscattering of the first waveform or a signal generated autonomously by the terminal device.

According to another aspect of the embodiment of the present application, a communication system is provided, including: a terminal device and/or a network equipment,

The terminal device of the aforementioned aspect,

The network device includes the apparatus according to the aforementioned other aspect.

With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

It should be emphasized that the term "include/comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components.

BRIEF DESCRIPTION OF THE DRAWINGS

The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

1A to 1C are schematic diagrams of a communication system according to an embodiment of the present application;

FIG2 is a schematic diagram of a signal sending method according to an embodiment of the present application;

3A to 6C are schematic diagrams of first time domain resources according to an embodiment of the present application;

7A and 7B are schematic diagrams of channels according to an embodiment of the present application;

8A to 8C are schematic diagrams of first frequency domain resources according to an embodiment of the present application;

9A to 9D are schematic diagrams of resource scheduling according to an embodiment of the present application;

10A and 10B are schematic diagrams of multiple second signals according to an embodiment of the present application;

11A to 11C are schematic diagrams of resource scheduling according to an embodiment of the present application;

FIG12 is a schematic diagram of a first information structure according to an embodiment of the present application;

FIG13 is a schematic diagram of a signal sending device according to an embodiment of the present application;

FIG14 is a schematic diagram of a signal receiving method according to an embodiment of the present application;

FIG15 is a schematic diagram of a signal receiving device according to an embodiment of the present application;

FIG16 is a schematic diagram of a network device according to an embodiment of the present application;

FIG17 is a schematic diagram of a terminal device according to an embodiment of the present application;

18A to 18C are schematic diagrams of resource scheduling according to an embodiment of the present application.

DETAILED DESCRIPTION

The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and/or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), etc.

Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR), 6G, etc., and/or other communication protocols currently known or to be developed in the future.

In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services for the terminal device. Network devices may include, but are not limited to, base stations (BS), access points (AP), transmission reception points (TRP), broadcast transmitters, mobile management entities (MME), gateways, servers, radio network controllers (RNC), base station controllers (BSC), and the like.

Base stations may include, but are not limited to, NodeB (NB), evolved NodeB (eNodeB or eNB), 5G base stations (gNB), IAB hosts, and more. They may also include remote radio heads (RRHs), remote radio units (RRUs), relays, or low-power nodes (e.g., femto, pico, etc.). The term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiments of the present application, the term "user equipment" (UE) refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be referred to as "terminal equipment" (TE). A terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS), terminal, user, subscriber station (SS), access terminal (AT), station, mobile terminal (MT), etc.

Terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

For another example, in scenarios such as the Internet of Things (IoT), terminal devices can also be machines or devices for monitoring or measurement, including but not limited to: machine type communication (MTC) terminals, vehicle-mounted communication terminals, device-to-device (D2D) terminals, machine-to-machine (M2M) terminals, tag-type terminal devices, etc.

In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

In the following description, the terms "uplink control signal" and "uplink control signal" are used to avoid confusion. The terms "uplink data signal" and "uplink data information" or "physical uplink shared channel (PUSCH)" are interchangeable.

The terms "downlink control signal" and "downlink control information (DCI)" or "physical downlink control channel (PDCCH)" are interchangeable, and the terms "downlink data signal" and "downlink data information" or "physical downlink shared channel (PDSCH)" are interchangeable.

A signal can also be referred to as information or a channel. Sending/receiving a transmission/signal/channel/information on a resource can be understood as sending/receiving that transmission/signal/channel/information using that resource. However, in the following description, "signal," "channel," and "information" are interchangeable to avoid confusion.

In the embodiment of the present application, high-layer signaling may be, for example, radio resource control (RRC) signaling; RRC signaling may include, for example, RRC messages (RRC message), for example, broadcast/public RRC messages/signaling (such as master information block (MIB), system information (system information)), dedicated RRC messages/signaling; or RRC information elements (RRC information element, RRC IE); or information fields included in RRC messages or RRC information elements (or information fields included in information fields). High-layer signaling may also be, for example, medium access control layer (MAC) signaling; or called MAC control element (MAC control element, MAC CE). For example, it may be adaptation layer signaling; in addition, the lower layer may also be replaced by the physical layer, but the present application is not limited thereto. The information or signal names used in the embodiment of the present application are only examples and may also be other names, and the embodiment of the present application is not limited thereto.

In the embodiments of the present application, a plurality refers to at least two, or two or more.

In the embodiments of the present application, predefined means specified in the protocol or determined according to the rules specified in the protocol, and no additional configuration is required. Configuration/indication refers to direct or indirect configuration/indication by the network device through high-layer signaling and/or physical layer signaling. Configuration/indication can be achieved by introducing high-layer parameters in high-layer signaling, and high-layer parameters refer to information fields (fields) and/or information elements/information units/information elements (IEs) in high-layer signaling. Physical layer signaling refers to, for example, control information (DCI) carried by the physical downlink control channel or control information carried by the sequence, but is not limited thereto.

For ease of description, the following description uses a base station as an example of an access network device. In the following description, "if...", "in the case of...", and "when..." can be used interchangeably without causing confusion. "Resource block", "RB" and "PRB", "physical resource block", "common resource block (CRB, Common RB)" can be used interchangeably. Configuration/indication/provided/given can be used interchangeably. "Index" and "identification (ID)" can be used interchangeably. exchange.

The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

Figures 1A to 1C are schematic diagrams of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in Figures 1A to 1C, a communication system 100 may include a network device 101 and a terminal device 102. For simplicity, Figures 1A to 1C illustrate only one terminal device and one network device as an example, but the embodiments of the present application are not limited thereto.

The network device can communicate directly with the terminal device (AIOT device), for example, as shown in Figure 1A, directly sending signals to the terminal device or directly receiving signals from the terminal device; the network device can also go through an intermediate node, for example, as shown in Figure 1B, using the intermediate node 103 (the intermediate node can be a repeater or IAB node or UE or relay, etc.) to send signals to the terminal device or use the intermediate node to receive signals from the terminal device; the network device can also send signals to the terminal device or receive signals from the terminal device with the assistance of the auxiliary node 103 (the auxiliary node can be a repeater or IAB node or UE or relay, etc.), for example, as shown in Figure 1C.

In this embodiment, the signal/information/configuration, etc., sent by the network device to the terminal device, or received by the terminal device from the network device, may be sent directly by the network device to the terminal device, or received by the terminal device via an intermediate node, or received by the terminal device with the help of an auxiliary node, or received by the terminal device via other methods. Unless otherwise specified, this embodiment is not limited to this.

In this embodiment, a terminal device may send signals/information to a network device, or a network device may receive signals/information from a terminal device. This may be done by the terminal device directly receiving the signals, by the network device via an intermediate node, by the terminal device receiving the signals with the help of an auxiliary node, or by other methods. Unless otherwise specified, this embodiment is not limited to this.

The following describes various implementations of the present application in conjunction with the accompanying drawings. These implementations are merely illustrative and are not intended to limit the present application.

Embodiments of the first aspect

An embodiment of the present application provides a signal sending method, which is described from the perspective of a terminal device.

FIG2 is a schematic diagram of a signal transmission method according to an embodiment of the present application. As shown in FIG2 , the method includes:

201, the terminal device receives the first information sent by the network device; wherein the first information at least includes First indication information indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information indicating a second time domain resource and/or a second frequency domain resource;

202. Send a second signal on the first time domain resource and/or the first frequency domain resource, and/or backscatter a first waveform on the second time domain resource and/or the second frequency domain resource.

In some embodiments, the first information may be information for scheduling resources, for example, at least scheduling time domain resources and/or frequency domain resources for sending the second signal and/or backscattering the first waveform. The first information may be carried by a first channel, and the first channel may be a downlink shared channel, a broadcast channel, or a downlink control channel, but the embodiments of the present application are not limited to this. That is, the first information may be broadcast by a cell, or sent by a network device after the terminal device accesses the network device, or sent by other network devices. The first information may be indicated by first layer signaling or second layer signaling, the first layer may be a physical layer, and the second layer may be a high layer, but the embodiments of the present application are not limited to this.

In some embodiments, the second signal is a single-carrier signal. Compared to existing multi-carrier signals, single-carrier signals have lower modulation and demodulation complexity and lower hardware device capability and precision requirements, effectively reducing the complexity and cost of terminal devices. The second signal is carried by a second channel, which may be an uplink shared channel, but this embodiment of the present application is not limited to this. In addition, the first information may be transmitted over a single carrier or over multiple carriers, but this embodiment of the present application is not limited to this.

In some embodiments, the second signal is a signal formed by the terminal device by backscattering the first waveform or a signal generated autonomously by the terminal device. The first waveform can be a continuous waveform (CW), or a carrier waveform (CW), or a backscattered/backscattering waveform, or a radio frequency wave, or a cosine wave, or a sine wave, or an uplink waveform (uplink wave), etc., but the present application is not limited to this. The terminal device involved in the embodiments of the present application can be a tag-type terminal device, but the embodiments of the present application are not limited to this name. As long as the terminal device uses the above-mentioned waveform to send a signal, it falls within the protection scope of the embodiments of the present application.

As an example, the terminal device sends the second signal by backscattering a first waveform. The first waveform is a waveform sent by the network device or a third-party device. The terminal device adjusts its backscatter circuit to modulate the information to be sent to the network device onto the first waveform, and then backscatters the modulated first waveform to form the second signal.

As another example, the terminal device autonomously generates the second signal and transmits it. The terminal device autonomously generates the first waveform and modulates the information to be sent to the network device onto the first waveform. Transmitted as the second signal.

In some embodiments, after receiving the second signal, the network device does not need to distinguish whether it is sent by the terminal device through backscattering or generated autonomously, but uses a unified receiving algorithm and mechanism to obtain the information carried on the second signal.

In some embodiments, the terminal device may receive one or more first information on a third time domain resource and/or a third frequency domain resource. How to indicate the third time domain resource and/or the third frequency domain resource for receiving the one or more first information will be described later. The terminal device may send a second signal on the first time domain resource and/or the first frequency domain resource, and/or backscatter a first waveform on the second time domain resource and/or the second frequency domain resource. The above time domain resources and/or frequency domain resources may be continuous or discontinuous, and may be periodic or non-periodic. In the following embodiments, continuous resources may be referred to as one resource, discontinuous resources may be referred to as "multiple resources" or "one resource", resources within one period may be referred to as one resource, and resources within multiple periods may be referred to as multiple resources. This application is not limited to this. The above continuous or discontinuous, periodic or non-periodic may be indicated (for example, by the first indication information and/or the second indication information), or predefined, and will be specifically described by example later.

The following first describes how to determine the first time domain resource and the second time domain resource.

In some embodiments, the first time domain resource is determined at least according to the first indication information and/or the second time domain resource and/or the second indication information and/or a predefined manner.

In some embodiments, the first time domain resource can be determined only based on the first indication information, which includes information for indicating one or more of the following: an index of the first time domain resource; one or more starting positions of the first time domain resource; one or more ending positions of the first time domain resource; one or more durations of the first time domain resource; a period of the first time domain resource; one or more offsets of the first time domain resource; and the number of the first time domain resources. The above "multiple" can be indicated in the form of a list. The starting position and/or the ending position and/or the duration and/or the period and/or the offset are indicated in units of a first time unit, and the first time unit includes an absolute time unit or a predefined time unit. The absolute time unit can be s or ms, etc., or other predefined time units such as frames, subframes, time slots, symbols, mini subframes, mini time slots, etc., and the embodiments of the present application are not limited to this.

In some embodiments, the starting position and/or offset is used to define the starting point of the first time domain resource (or the starting point of the time unit), and the starting position and/or offset may include a first number of first time units, with the first time point as the reference point of the starting point. That is, the terminal device may be within the first number of first time units after the first time point. The second information is sent (on the first time domain resource) after the first element, and the first time point includes: the starting position or ending position of the third time domain resource for receiving the first information; or the starting position or ending position of the first time domain resource or the second time domain resource before the first time domain resource; or the starting position or ending position of the fourth time domain resource for receiving the downlink signal (such as the downlink synchronization signal) or information; or the starting position or ending position of the fifth time domain resource of the downlink channel; or the starting position of the corresponding period. If the first indication information includes multiple starts and/or offsets, they correspond to the starts and/or offsets of multiple first time domain resources respectively. If the first indication information includes one start and/or offset, the start and/or offset can be the start of the first first time domain resource in one or more first time domain resources. If the first time domain resource is periodic, the start and/or offset can be the start and/or offset of one or more first time domain resources in each period.

In some embodiments, the duration and/or the number and/or end position of the first time domain resources can be used to determine the size, length or end point of the first time domain resource. The duration can include a sixth number of first time units, and the end position can include a seventh number of first time units. The reference point of the end position can be the same as the reference point of the start and/or offset, or the start position can be used as a reference point. The embodiments of the present application are not limited to this. If the first indication information includes multiple durations and/or end positions, they correspond to the durations and/or end positions of multiple first time domain resources respectively. If the first indication information includes one duration and/or end position, the end position can be the end of the last first time domain resource in one or more first time domain resources, and the durations of multiple first time domain resources are the same. If the first time domain resource is periodic, the duration and/or end can be the duration and/or end of the first time domain resource in each period.

In some embodiments, a time domain and/or frequency domain resource allocation table can be predefined, and the time domain and/or frequency domain resource allocation table can be dedicated to this type of terminal device, or shared with ordinary terminal devices, or shared by a cell, or dedicated to the terminal device. The time domain and/or frequency domain resource allocation table may include multiple rows of time domain and/or frequency domain resource information, each row of time domain and/or frequency domain resource information includes a time domain and/or frequency domain resource index, and a starting position and/or offset and/or end position and/or duration and/or bandwidth corresponding to the time domain and/or frequency domain resource index, etc. The starting position and/or offset and/or end position and/or duration in the table are indicated in units of a first time unit, as described above, and will not be repeated here. The time domain resource allocation table and the frequency domain resource allocation table can be two tables, or a common table, and the embodiments of the present application are not limited to this. The indication of frequency domain resources will be explained later. The first indication information may include one or more indexes. The time domain resource information corresponding to the one or more indexes in the time domain and/or frequency domain resource allocation table is used to determine the first time domain resource.

In some embodiments, the above-mentioned time domain and/or frequency domain resource information, and the corresponding time domain and/or frequency domain resources The index may also be pre-configured on the network device side, or may be notified to the terminal device in advance, for example, after the terminal device initially accesses the network device, the network device notifies the terminal device. The embodiments of the present application are not limited to this. The first indication information may include one or more indexes, and the time domain and/or frequency domain resource information corresponding to the one or more indexes is used to determine the first time domain resource and/or the first frequency domain resource. The implementation of the time domain and/or frequency domain resource information is not further described.

In some embodiments, the starting position of the cycle of the first time domain resource includes: the starting position or the ending position of the third time domain resource; or the starting position of the first first time domain resource. Alternatively, the starting position of the cycle of the first time domain resource may also be the position of the first time unit after the starting position or the ending position of the third time domain resource, and the cycle includes the eighth number of first time units, that is, the eighth number of first time units from the starting position of the above cycle is a cycle, and this is repeated. The first indication information may include the eighth and/or thirteenth number of period information.

In addition, the number of the first time domain resources in the first indication information is at most the second number, and/or the number of the offsets is at most the third number, and/or the starting number is at most the fourth number, and/or the ending number is at most the fifth number, and at least two of the second number, the third number, the fourth number and the fifth number are the same or different.

The following examples are given respectively. In the figure, UL represents the second signal, SS represents the synchronization signal, and the corresponding rectangles represent the resources where the signals/information are located.

As an example, the first indication information includes {starting position/offset, duration list/end position list}. Based on this first indication information, one or more first time domain resources can be determined, where the duration list includes {duration 1, duration 2, ...}. The number of elements in the duration list is N1, and the maximum value of N1 is the fifth number. As shown in Figure 3A, the starting position is indicated with the starting position of the third time domain resource as a reference point, and the duration list includes D1, D2, and D3, thereby determining the position of the first time domain resource. D1, D2, and D3 can be the same or different.

As an example, the first indication information includes a list of {starting position/offset, duration/end position}. Based on the first indication information, one or more first time domain resources can be determined, where each first time domain resource corresponds to an element in the list, the list has N2 elements, and the maximum value of N2 is the second number. As shown in Figure 3B, the three starting positions in the list are all indicated with the starting position of the third time domain resource as a reference point, and the three durations in the list include D1, D2, and D3, thereby determining the position of the first time domain resource. Unlike Figure 3A, the first time domain resource can be discontinuous.

As an example, the first indication information includes {starting position/offset, duration, number of first time domain resources}. One or more first time domain resources can be determined based on the first indication information. As shown in FIG3C , unlike FIG3A , the duration of each first time domain resource is the same. The number of first time domain resources is N2, and the maximum value of N2 is the second number.

The examples in Figures 3A to 3C may determine one or more first time domain resources. However, the present application is not limited thereto, and one first time domain resource may also be determined, as described below with reference to Figures 4A and 4B.

As an example, the first indication information includes {starting position, duration}. According to the first indication information, a first time domain resource can be determined. As shown in Figure 4A, the starting position is indicated by the ending position of the third time domain resource as a reference point, and the duration includes D1, thereby determining the position of the first time domain resource.

As an example, the first indication information includes {offset, end position}. According to the first indication information, a first time domain resource can be determined. As shown in Figure 4B, the offset position and the end position are indicated with the end position of the third time domain resource as a reference point, thereby determining the position of the first time domain resource.

The following describes the case where the first indication information also includes a period with reference to Figures 5A to 5B. One or more first time domain resources may be included in one period.

As an example, the first indication information includes {period, starting position, duration}. According to the first indication information, multiple first time domain resources (one first time domain resource for each period) can be determined. As shown in Figure 5A, the starting position of the period is the end position of the third time domain resource, and the starting position and duration are the starting position and duration of the first time domain resource within a period, that is, the reference point of the starting position within a period is the starting position of the corresponding period.

As an example, the first indication information includes a period, a {starting position, duration} list, and multiple first time domain resources (multiple first time domain resources in each period) can be determined based on the first indication information. As shown in Figure 5B, the starting position of the period is the starting position of the first time domain resource, and the {starting position, duration} list is the starting position and duration of multiple first time domain resources within a period. The reference point of the starting position within a period is the starting position of the corresponding period.

In some embodiments, a downlink (synchronization) signal/information may be sent by the network device to the terminal device at the beginning of each cycle. The downlink signal/information may be carried by the first information or sent independently of the first information. The embodiments of the present application are not limited to this. In this case, the first time point may also be the start/end of the fourth time domain resource for receiving the downlink signal/information, or the first time point may also be the start of the corresponding cycle. This is explained below with reference to Figures 6A to 6C.

As an example, the first indication information includes the cycle length and the {starting position, duration} list of the first time domain resources. Based on the first indication information, multiple first time domain resources (multiple first time domain resources per cycle) can be determined. As shown in Figure 6A, the starting position of the cycle is the starting position of the third time domain resource. The {starting position, duration} list is the starting position and duration of multiple first time domain resources within a cycle. The reference point of the starting position within a cycle is the starting position of the corresponding cycle or the downlink synchronization signal.

As an example, the first indication information includes {cycle length, starting position of the first time domain resource, duration of the first time domain resource}. According to the first indication information, multiple first time domain resources (one first time domain resource for each cycle) can be determined. As shown in Figure 6B, the starting position of the cycle is the starting position of the third time domain resource. The {starting position, duration} list is the starting position and duration of a first time domain resource within a cycle. The reference point of the starting position within a cycle is the starting position of the corresponding cycle or the downlink synchronization signal.

As an example, the first indication information includes the cycle length, the cycle starting position/offset, and the {starting position, duration} list of the first time domain resource. Based on the first indication information, multiple first time domain resources (multiple first time domain resources per cycle) can be determined. As shown in Figure 6C, the starting position of the cycle is determined based on the starting/ending position of the third time domain resource + the cycle offset. The {starting position, duration} list is the starting position and duration of a first time domain resource within a cycle. The reference point of the starting position within a cycle is the starting position of the corresponding cycle.

The following describes a case where the first indication information includes an index.

As an example, the time domain and/or frequency domain resource allocation table is shown in Table 1 below:

Table 1

The first indication information includes one or more indexes. According to the indexes and the corresponding Table 1, the first time domain resources corresponding to the one or more indexes can be determined, or

The first indication information includes a period and one or more indexes. According to the index and the corresponding Table 1, the first time domain resources corresponding to the one or more indexes in a period can be determined.

As an example, the time domain and/or frequency domain resource allocation table is shown in Table 2 below:

Table 2

That is, the time domain resources and the frequency domain resources share a table (index), and the first indication information includes one or more indexes. According to the index and Table 1, the first time domain resources corresponding to the one or more indexes can be determined, or the first indication information includes a period and one or more indexes. According to the index and Table 1, the first time domain resources corresponding to the one or more indexes within a period can be determined. Frequency domain resources will be described later.

In the above example, the first time domain resource can be determined based only on the first indication information, but the embodiment of the present application is not limited to this. For example, the first time domain resource can also be determined based on the first indication information in a predefined manner, as illustrated in the following example.

In some embodiments, at least one of the aforementioned start and/or offset and/or period and/or duration and/or end and/or quantity and/or index is indicated by a first indication information, and at least one other item is determined in a predefined manner to determine the first time domain resource.

As an example, the first indication information indicates a duration or a list of durations, and the start and/or offset is a default value (predefined), for example, the offset is predefined as T1 seconds/milliseconds from the starting position of the first time domain resource to the end position/start position of the third time domain resource, or, to K1 first time units after the end position/start position of the third time domain resource.

As an example, the first indication information indicates a list of {duration and/or end, start and/or offset}, and the period is a default value (predefined), for example, the period is T2 seconds/milliseconds, or K2 first time units, or the period is indicated by other information or determined by other information. For example, the period is the same as the period of the first information/synchronization signal/broadcast channel, or is determined by the fifth indication information. Examples are not given here one by one.

As an example, the first indication information indicates a start and/or offset, and the duration is a default value (predefined).

In some embodiments, the first time domain resource may also be determined according to the second indication information and/or the second time domain resource. The following details are explained in detail.

In some embodiments, the second indication information includes information indicating one or more of the following: an index of the second time domain resource; one or more starting positions of the second time domain resource; one or more ending positions of the second time domain resource; one or more durations of the second time domain resource; a period of the second time domain resource; one or more offsets of the second time domain resource; or the number of second time domain resources. The "multiple" above may be indicated in a list format. The manner in which each information item in the second indication information is indicated is the same as the manner in which each information item in the first indication information is indicated, and will not be repeated here. The start and/or end and/or duration and/or offset and/or number of the second time domain resource of the backscattered first waveform may also be referred to as the start and/or end and/or duration and/or offset and/or number of the first waveform in the time domain. The manner in which the second time domain resource is determined based on the second indication information is also not further described. The first time domain resource and the second time domain resource may be the same, or the first time domain resource and the second time domain resource may partially overlap, but this is not a limitation of the present embodiment.

The above embodiments for determining the first time domain resource and/or the second time domain resource may be implemented separately or in combination. For example, the first time domain resource and/or the second time domain resource may be determined based on a combination of at least two of the first indication information, the second indication information, and a predefined manner. For example, the start of the first time domain resource is indicated by the first indication information, the duration is predefined, and the period is indicated by the second indication information, etc. Examples are not given one by one here.

The above describes how to determine the first time domain resource and the second time domain resource. The following describes how to determine the first frequency domain resource and the second frequency domain resource.

In some embodiments, the first frequency domain resources are determined at least according to the first indication information and/or a channel of other signals or channels and/or a predefined manner and/or the second indication information and/or the second frequency domain resources.

In some embodiments, the first indication information includes channel indication information. The channel may also be replaced by a "frequency domain resource unit." The channel size is Y kHz (e.g., 200 kHz, 180 kHz) or includes a predetermined number of first frequency units. The first frequency unit includes an absolute frequency unit or a predefined frequency unit. The absolute frequency unit may be Hertz, etc., or other predefined frequency units such as resource blocks. The embodiments of the present application are not limited thereto.

In some embodiments, the first frequency domain resource is a single channel, and the channel indication information includes a channel identifier, which can number all channels in sequence on the frequency band (which can be the frequency band allocated for this type of terminal device). The identifier is the number, and the number can start from 0 or from 1. The embodiment of the present application is not limited to this. As shown in Figure 7A, for example, for FDD uplink spectrum n8, the channel identifier is determined in ascending order from 0 according to the order of frequency domain resources from low to high. Alternatively, all channels can be numbered in sequence on the frequency The channels are grouped and numbered in frequency order within each group. The channel indication information includes a channel identifier and a channel group identifier. The channel identifier is the number within the group of the channel group identifier. As shown in FIG7B , for example, for the FDD uplink spectrum n8, the channels are first grouped to obtain groups 1 and 2. The channel identifiers are determined in ascending order starting from 0 according to the order of the frequency domain resources within the group from low to high.

In some embodiments, the first frequency domain resource is a plurality of channels, and the channel indication information includes a plurality of channel identifiers. All channels can be numbered in order on the frequency. The identifier is the number, and the numbering can start from 0 or from 1. The embodiments of the present application are not limited to this. Alternatively, all channels can be grouped in order on the frequency, and the channels in each group can be numbered in order on the frequency. The channel indication information includes a channel group identifier, and the channels in the group are all the first frequency domain resources. Alternatively, the channel indication information is the first channel identifier and the number of channels. The multiple channels can be determined according to the first channel identifier and the number of channels, thereby determining the first frequency domain resource.

In some embodiments, the one or more channels corresponding to the first frequency domain resource are the same as or different from the channel where the first information is located (as shown in Figure 8A). If the first frequency domain resource corresponds to multiple channels, the first time domain resource in each channel is the same (as shown in Figure 8B) or different (as shown in Figure 8C).

In some embodiments, the first indication information may include information for indicating one or more of the following: an index of the second frequency domain resource; one or more starting positions of the second frequency domain resource; one or more ending positions of the second frequency domain resource; one or more bandwidths of the second frequency domain resource; a period of the second frequency domain resource; one or more offsets of the second frequency domain resource; the number of the second frequency domain resources. The above "multiple" can be indicated in a list. The starting position and/or the ending position and/or the bandwidth and/or the period and/or the offset are indicated in units of a first frequency unit, and the first frequency unit includes an absolute frequency unit or a predefined frequency unit. The absolute frequency unit can be Hertz, etc., or other predefined frequency units such as resource blocks. In addition, the starting position and bandwidth can be indicated independently or jointly (for example, through SLIV indication), and the embodiments of the present application are not limited to this.

In some embodiments, the starting position and/or offset is used to define the starting point of the first frequency domain resource. The starting position and/or offset may include a ninth number of first frequency units. If the first indication information includes multiple starting positions and/or offsets, they correspond to the starting positions and/or offsets of multiple first frequency domain resources respectively. If the first indication information includes one starting position and/or offset, the starting position and/or offset may be the starting position of the first first frequency domain resource in one or more first frequency domain resources. If the first frequency domain resource is periodic, the starting position and/or offset may be the starting position and/or offset of the first frequency domain resource in each period.

In some embodiments, the bandwidth and/or the number and/or end position of the first frequency domain resources can be used to determine the size, width or end point of the first frequency domain resource. The bandwidth can include the tenth number of first frequency units, and the end position can include the eleventh number of first frequency units. The reference point of the end position can be the same as the reference point of the start and/or offset, or the start position can be used as the reference point. The embodiments of the present application are not limited to this. If the first indication information includes multiple bandwidths and/or end positions, they correspond to the bandwidths and/or end positions of multiple first frequency domain resources respectively. If the first indication information includes one bandwidth and/or end position, the end position can be the end of the last first frequency domain resource in one or more first frequency domain resources, and the duration of multiple first frequency domain resources is the same. If the first frequency domain resource is periodic, the bandwidth and/or end can be the duration and/or end of the first frequency domain resource in each period.

In some embodiments, a time domain and/or frequency domain resource allocation table can be predefined or preconfigured. The form of the allocation table is as described above and will not be repeated here. The first indication information may include one or more indexes, and the frequency domain resource information corresponding to the one or more indexes in the time domain and/or frequency domain resource allocation table is used to determine the first frequency domain resource.

In some embodiments, the period includes a twelfth number of first frequency units.

In addition, the starting and/or offset and/or ending reference point of the first frequency domain resource can be the center frequency point (point A) or the starting or ending position of the second frequency domain resource, etc., which will not be repeated here.

For example, the first indication information includes one or more {time domain resource indexes and/or frequency resource indexes}, where the time domain resource index indicates the corresponding first time domain resource, and the frequency resource index indicates the corresponding first frequency domain resource, that is, the time domain resource and the frequency resource correspond to their respective tables. Optionally, a period may also be included.

For example, (in the case where the cell only supports a single channel, the single channel is the first frequency domain resource), the first indication information includes one or more time domain resource indexes. Optionally, it may also include a period.

For example, the first indication information includes one or more resource indexes, and the resources corresponding to the resource indexes include a first time domain resource and a first frequency domain resource. The time domain resource and the frequency resource correspond to one table, as shown in Table 2. Optionally, a period may also be included.

In some embodiments, in addition to the first indication information described above, the first frequency domain resource may be determined in a predefined manner. For example, one or more channels may be predefined (for the terminal device or for the type of terminal device) as the first frequency domain resource. For example, unlike Figures 7A and 7B, the frequency band (which may be a frequency band allocated for the type of terminal device, with predefined frequency points and bandwidth) includes only a single channel, and the channel is the first frequency domain resource. The channel bandwidth may be predefined by the aforementioned first frequency unit.

In some embodiments, the first frequency domain resource can also be determined based on other signals or channels, including: the channel for receiving the first information, or the channel for the most recent downlink signal or information received before sending the second signal, or the channel on which the signal or information was last sent; the channel on which the first waveform is located; the channel on which the downlink synchronization signal and/or broadcast channel is located. In other words, the first frequency domain resource is the channel for receiving the first information, or the channel for the most recent downlink signal or information received before sending the second signal, or the channel on which the signal or information was last sent; the channel on which (received or backscattered) the first waveform is located; and the channel on which the downlink synchronization signal and/or broadcast channel is located.

In some embodiments, the first frequency domain resource can be determined based on the second frequency domain resource and/or the second indication information. The indication method of the second frequency domain resource in the second indication information is similar to the indication method of the first frequency domain resource in the aforementioned first indication information, and the repeated parts are not repeated.

In some embodiments, when the first information includes first indication information for indicating the first frequency domain resource, the terminal device determines the first frequency domain resource based on the first indication information, or determines the first frequency domain resource based on a predefined method. When the first information does not include first indication information for indicating the first frequency domain resource, the terminal device determines the first frequency domain resource based on a predefined method or based on a channel of other signals or channels and/or a predefined method and/or the second indication information and/or the second frequency domain resource. This is only an example, and the embodiments of the present application are not limited to this.

The following example illustrates that a terminal device receives the first information on a first channel (third frequency domain resource), transmits the second signal on a second channel (first frequency domain resource), and backscatters the first waveform on a third channel (second frequency domain resource). The first, second, and third channels may be the same or different. In other words, the first, second, and third frequency domain resources may be the same or different.

For example, the second channel is the same as the third channel, that is, the first frequency domain resource is the same as the second frequency domain resource.

For example, the second channel is the same as the first channel, that is, the first frequency domain resource is the same as the third frequency domain resource.

For example, the second channel is the same channel that receives the first waveform.

For example, the second channel is the same as the downlink (synchronization signal)/broadcast channel/or the third channel.

For example, the second channel may be a default channel.

For example, the second channel may be indicated by the first indication information.

For example, the second channel may also be indicated by other information, such as control information/command information, a broadcast channel, etc.

The following describes how to determine the third time domain resource and the third frequency domain resource.

In some embodiments, the terminal device may also receive third information sent by the network device, the third information at least including a third indication of a third time domain resource and/or a third frequency domain resource for indicating receiving the first information. Information. The third information can be carried by a third channel, and the third channel can be a downlink control channel, but the embodiment of the present application is not limited to this. The third information can be indicated by first layer signaling or second layer signaling, the first layer can be a physical layer, and the second layer can be a high layer, but the embodiment of the present application is not limited to this. The implementation method of the third indication information indicating the third time domain resource and/or the third frequency domain resource can refer to the implementation method of the first indication information indicating the first time domain resource and/or the first frequency domain resource, and will not be repeated here.

In some embodiments, the third frequency domain resource (first channel) may be in the full frequency domain, or in a certain group of channels, or in a certain channel, or in a certain group of channels. For example, the terminal device may receive downlink information (first information) on a certain channel in a certain group of channels, or the terminal device may receive downlink information on a certain channel in the full frequency domain, or the terminal device may receive downlink information on any channel in a certain group of channels, or the terminal device may receive downlink information on a certain group of channels in the full frequency domain.

In some embodiments, the terminal device can receive multiple first information. Except for the last first information, the other first information can also include third indication information for indicating the third time domain resources and/or third frequency domain resources of one or more first information after receiving the first information.

As an example, a third information may be used to indicate the receipt of a third time domain resource and/or a third frequency domain resource for a first information (as shown in FIG9A ). Alternatively, multiple third information may be received, each third information scheduling a third time domain resource and/or a third frequency domain resource for its corresponding first information.

As an example, a third information may be used to indicate a third time domain resource and/or a third frequency domain resource for receiving all (plural) first information (as shown in FIG. 9C ).

As an example, a third information indication may be used to receive a third time domain resource and/or a third frequency domain resource for a first first information among multiple first information. The first first information indication is used to receive a third time domain resource and/or a third frequency domain resource for a second first information, the second first information indication is used to receive a third time domain resource and/or a third frequency domain resource for a third first information, and so on (as shown in FIG9B ).

As an example, a third information indication can be used to receive a third time domain resource and/or a third frequency domain resource for the first first information among multiple first information. The first first information indication is used to receive the third time domain resource and/or the third frequency domain resource for all subsequent first information (as shown in FIG9D ).

In some embodiments, the relationship between the frequency domain resources where the first information and/or second signal and/or first waveform and/or third information are located and other system frequency bands such as NR and LTE is that they are located in other system frequency bands (in-band) or have a guard band (guard band) or are independent (standalone).

In some embodiments, the terminal device sends at least one second signal, and the contents of the multiple second signals are completely the same. The first time domain resources of the plurality of second signals may be the same as (as shown in FIG. 10A ) or partially the same as (as shown in FIG. 10B ) or completely different, wherein the duration of the first time domain resource for each second signal may be a fixed value or variable, the number of information bits carried by the second signal may be fixed or variable, or the transport block size carried by the second signal may be fixed or variable, and the embodiments of the present application are not limited thereto. The first time domain resources of the plurality of second signals may be scheduled by one first information or by different first information. The following examples illustrate.

For example, as shown in Figure 11A, the first time domain and/or frequency domain resources of the multiple second signals are scheduled by a first information. As shown in Figure 11B, the difference from Figure 11A is that before each second signal is sent, a downlink synchronization signal will be received (the downlink synchronization signal may also be carried by the first information). As shown in Figure 11C, the first first information schedules the first time domain and/or frequency domain resources of the first second signal, the second first information schedules the first time domain and/or frequency domain resources of the second second signal, and so on. In addition, the first first information may also schedule the third time domain and/or frequency domain resources of the subsequent first information.

Various types of time domain resources and/or frequency domain resources are described above. The first information is further described below.

In some embodiments, the first information may include at least one of the following parts: a header sequence, data information, and a sequence. The header sequence may include at least one of a leading sequence, a header sequence, or a command code, and optionally, a synchronization sequence. The data information may include the aforementioned first indication information and/or second indication information, and the tail sequence may be at least one of a cyclic redundancy check (CRC) sequence or a frame end identification sequence. FIG12 is a schematic diagram of an implementation of the first information of an embodiment of the present application. As shown in FIG12, the first information includes a leading sequence, data information, and a CRC sequence. This is only an example, and the embodiment of the present application is not limited to this.

In some embodiments, the first information (e.g., the data information portion) may further include control information and/or a downlink information identifier for indicating that the first information is used to schedule resources. The downlink information identifier may be, for example, similar to an RNTI, or a command code/code indicating that the first information is used to schedule resources, or a command code/code indicating that the terminal device sends the content of the second signal, or an uplink repetition (UL repetition) identifier. Alternatively, the downlink information identifier may not be indicated by the first information, but may be indicated in an implicit manner. For example, when the terminal device is in the first state (described below), and the terminal device receives the first information and backscatters the first waveform, it implicitly indicates that the first information is used to schedule resources for sending the second signal. Alternatively, the downlink information identifier may also be indicated by third information.

In some embodiments, the terminal device receives the first information in the first state; and/or sends the second information in the second state; and/or receives the third information in the third state. The third state is the same or different, including but not limited to the ready state, the state of being able to send or receive after being charged; the state after being connected to the network; the state of being able to perform unicast; and the disconnected killed state.

In some embodiments, the first information may be dedicated scheduling or group-based scheduling. The resource scheduling method in this application is described below.

In some embodiments, the terminal device may be scheduled in a dedicated scheduling manner, and the first information may also include a device identifier, and the first information is related to the device identifier. For example, the CRC of the first information may be scrambled using information related to the device identifier, or the information related to the device identifier may be used as a CRC to check the first information. The embodiments of the present application are not limited to this. Alternatively, the third information may also include a device identifier, and the third information is related to the device identifier. For example, the CRC of the third information may be scrambled using information related to the device identifier, or the information related to the device identifier may be used as a CRC to check the third information.

In some embodiments, the terminal device can be scheduled based on group scheduling, and the one or more first information and/or third information can also include multiple device identifiers, at least two of the multiple device identifiers are different, or in other words, the multiple device identifiers are all different.

In this embodiment (for example, the group-scheduled resources may be contention-based) the terminal device may randomly select the first time domain resource and/or the first frequency domain resource indicated by the first information to send the second signal, and/or the second time domain resource and/or the second frequency domain resource to backscatter the first waveform.

In this embodiment (for example, the resources scheduled by the group may be non-contention-based), the terminal device may select the first time domain resource and/or the first frequency domain resource indicated by the first information matching its device identification to transmit the second signal, and/or the second time domain resource and/or the second frequency domain resource to backscatter the first waveform. In this embodiment, the first information is related to the device identification, for example, the CRC of the first information may be scrambled using information related to the device identification, or the information related to the device identification may be used as a CRC to check the first information, but the embodiments of the present application are not limited thereto.

In some embodiments, the network device may send a set of first information to the terminal device to schedule a set of second signals and/or first waveforms. The first information and/or third information may also include multiple device identifiers, and/or group information. The group information includes at least one of the following information: group identifier (the resources for devices in the group to send signals can be scheduled by the first information), the number of devices in the group, and state information (the resources for devices in this state to send signals can be scheduled by the first information). The resources for the terminal device corresponding to the device identifier and/or group information in the first information and/or third information to send the second information are the resources scheduled by the group. The terminal device determines the device identifier corresponding to the terminal device in the first information or the third information, and sends the second information in the first time domain resource corresponding to the device identifier. The second information is sent on the source and/or the first frequency domain resource.

The following explains them separately.

As an example, the terminal device receives a first information, which includes at least the group information, multiple device identifiers, and first indication information for indicating multiple first time domain resources and/or multiple first frequency domain resources, and/or second indication information for indicating multiple second time domain resources and/or multiple second frequency domain resources.

As an example, the terminal device receives third information and first information, and the third information and/or the first information include group information, and/or multiple device identifiers; the third information also includes third indication information for indicating a third time domain resource and/or a third frequency domain resource for receiving the first information, and the first information includes first indication information for indicating multiple first time domain resources and/or multiple first frequency domain resources, and/or second indication information for indicating multiple second time domain resources and/or multiple second frequency domain resources, as shown in Figure 18A.

As an example, a terminal device receives multiple first information, the first first information includes at least the group of information, a device identifier, a first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or a second indication information for indicating a second time domain resource and/or a second frequency domain resource, and a third indication information for receiving a third time domain resource and/or a third frequency domain resource of all other first information. Other first information includes a device identifier, a first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or a second indication information for indicating a second time domain resource and/or a second frequency domain resource. Therefore, the device identifier and the indicated resource in each first information correspond, as shown in FIG18B .

As an example, the terminal device receives multiple first information, the first first information includes at least the group of information, a device identifier, a first indication information indicating the first time domain resource and/or the first frequency domain resource, and/or the second indication information indicating the second time domain resource and/or the second frequency domain resource, and the third indication information of the third time domain resource and/or the third frequency domain resource received after the first information. Other first information (except the last one) includes the device identifier, the third indication information of the third time domain resource and/or the third frequency domain resource of the subsequent first information, the first indication information indicating the first time domain resource and/or the first frequency domain resource, and/or the second indication information indicating the second time domain resource and/or the second frequency domain resource. The last first information includes the device identifier, the first indication information indicating the first time domain resource and/or the first frequency domain resource, and/or the second indication information indicating the second time domain resource and/or the second frequency domain resource, as shown in Figure 18C.

As an example, the terminal device receives multiple first information, the first first information includes at least the group information, multiple device identifiers and first indication information for indicating multiple first time domain resources and/or multiple first frequency domain resources, and/or second indication information for indicating multiple second time domain resources and/or multiple second frequency domain resources. The first information carries a downlink synchronization signal.

As an example, a terminal device receives third information and multiple first information, the third information includes group information, third indication information indicating a third time domain resource and/or a third frequency domain resource for receiving the multiple first information, and each of the first information includes at least one device identifier, first indication information corresponding to the one device identifier for indicating the first time domain resource and/or the first frequency domain resource, and/or second indication information for indicating multiple second time domain resources and/or multiple second frequency domain resources.

As an example, a terminal device receives third information and multiple first information, the third information includes group information, third indication information for indicating a third time domain resource and/or a third frequency domain resource for receiving the multiple first information, multiple device identifiers, each of the first information includes at least first indication information of a first time domain resource and/or a first frequency domain resource; and/or, second indication information for indicating multiple second time domain resources and/or multiple second frequency domain resources.

As an example, a terminal device receives third information and multiple first information, the third information including group information, third indication information for indicating the third time domain resource and/or third frequency domain resource for receiving the first first information, multiple device identifiers, each of the first information including at least first indication information for the first time domain resource and/or the first frequency domain resource; and/or, second indication information for indicating the second time domain resource and/or the second frequency domain resource, and third indication information for the third time domain resource and/or the third frequency domain resource of the subsequent first information.

For example, the first information includes a list of {device identifier, first time domain resource}, that is, the device identifier and the first time domain resource in an element in the list correspond to each other.

For example, the first information includes multiple first time domain resources and multiple device identifiers, and the multiple first time domain resources and the multiple device identifiers are in a one-to-one correspondence in sequence. Alternatively, the multiple first time domain resources and the multiple device identifiers have no corresponding relationship, and the terminal device selects the first time domain resource for sending the second information based on competition.

For example, the third information includes a list of {device identifier, third time domain resource}, that is, the device identifier in an element of the list corresponds to the third time domain resource. The terminal device corresponding to the device identifier receives the first information on the third time domain resource and transmits the second signal and/or backscatters the first waveform on the resource indicated by the received first information.

For example, the third information includes multiple device identifiers and multiple third time domain resources, and the multiple third time domain resources and the multiple device identifiers correspond to each other in sequence. The terminal device corresponding to the device identifier receives the first information on the third time domain resource and sends the second signal and/or backscatters the first waveform on the resource indicated by the received first information.

For example, the third information includes a plurality of third time domain resources, and the first information includes {device identifier, first time domain resources The plurality of third time domain resources and the plurality of device identifiers are in one-to-one correspondence in sequence. The terminal device and the terminal device corresponding to the device identifier send the second signal on the first time domain resource.

In the above example, the first time domain resource is used as an example. The correspondence between the first frequency domain resource/the second time domain resource/the second frequency domain resource and the device is similar and will not be further described here. In addition, in the above example, before sending the second signal, the terminal device may also receive a downlink synchronization signal. The downlink synchronization signal may be carried by the first information or received independently. The embodiments of the present application are not limited to this.

In some embodiments, the device identification is reported by the terminal device to the network device or assigned by the network device. For example, the device identification may be randomly generated by the terminal device and reported to the network device, or factory-set and reported to the network device, or may be part or all of the identification content reported by the terminal device to the network device during initial access/random access. Alternatively, the device identification may be generated by the network device and notified to the terminal device, or part of the device identification may be assigned by the network device and the other part may be reported to the network device by the terminal device, wherein the part notified to the terminal device by the network device is a unique identification or a portion of a unique identification.

The above only describes the steps or processes related to the present application, but the present application is not limited thereto. The method of the embodiment of the present application may also include other steps or processes. For the specific content of these steps or processes, reference may be made to the relevant art.

The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

According to an embodiment of the present application, a resource scheduling method for signal transmission by tag-type terminal devices is proposed, which enables the terminal devices to have appropriate time-frequency resources to transmit information. It also proposes scheduling the time domain resources for signal transmission by terminal devices using backscattered waveforms, which reduces the signaling overhead of resource scheduling and improves the flexibility of resource scheduling. Furthermore, the resource scheduling method proposed in this embodiment supports periodic resource scheduling, which can reduce the signaling overhead of resource scheduling and provide synchronization for each periodic uplink transmission.

This application also proposes a scheduling method for exclusive scheduling of transmission resources for a terminal device, thereby effectively scheduling the transmission resources for a specific device and ensuring that the device can send information. This application also proposes a scheduling method for the transmission resources of a group of terminal devices, making the resource scheduling method more flexible.

The resource scheduling scheme proposed in this application also supports terminal devices to repeatedly send uplink signals, thereby increasing the signal energy received by the receiving end of the network device, thereby ensuring that the signals sent by devices at the edge of the cell can be correctly received by the network side, thereby improving the uplink coverage of the network.

In addition, the solution proposed in this application can further improve the probability of terminal devices correctly receiving scheduling information by indicating the time-frequency resources where the scheduling information is obtained, improve the accuracy of tag-type devices in obtaining sending resources, avoid collisions and reduce delays.

Embodiments of the second aspect

The embodiment of the present application provides a signal sending device, which may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device, and the same contents as those in the embodiment of the first aspect will not be repeated here.

Figure 13 is a schematic diagram of a signal sending device according to an embodiment of the present application. Since the principle of solving the problem by the signal sending device is the same as the method of the embodiment of the first aspect, its specific implementation can refer to the embodiment of the first aspect, and the same contents will not be repeated.

As shown in FIG13 , a signal sending device 1300 according to an embodiment of the present application includes:

A receiving unit 1301 receives first information sent by a network device; wherein the first information includes at least first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information for indicating a second time domain resource and/or a second frequency domain resource;

The transmitting unit 1302 sends a second signal on the first time domain resource and/or the first frequency domain resource, and/or backscatters a first waveform on the second time domain resource and/or the second frequency domain resource; the second signal is a signal formed by the terminal device by backscattering the first waveform or a signal generated autonomously by the terminal device.

The implementation of the receiving unit 1301 and the transmitting unit 1302 can refer to 201-202 of the first aspect, and the repeated parts are not repeated here.

In addition, for the sake of simplicity, FIG13 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

Embodiments of the third aspect

An embodiment of the present application provides a signal receiving method, which is described from the perspective of a network device, and the contents that are the same as those in the embodiment of the first aspect will not be repeated.

FIG14 is a schematic diagram of the signal receiving method according to an embodiment of the present application. As shown in FIG14 , the method includes:

1401. A network device sends first information to a terminal device; wherein the first information includes at least first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information for indicating a second time domain resource and/or a second frequency domain resource;

1402. The network device receives a second signal sent by the terminal device on the first time domain resource and/or the first frequency domain resource; the second signal is a signal formed by the terminal device through backscattering of the first waveform or a signal autonomously generated by the terminal device.

The implementation of 1401-1402 can refer to 201-202 of the first aspect, and the repeated parts will not be repeated.

The above only describes the steps or processes related to the present application, but the present application is not limited thereto. The method of the embodiment of the present application may also include other steps or processes. For the specific content of these steps or processes, reference may be made to the relevant art.

The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

Embodiments of the fourth aspect

The embodiment of the present application provides a signal receiving device, which may be, for example, a network device, or one or more components or assemblies configured in the network device, and the same contents as those in the embodiment of the third aspect will not be repeated here.

Figure 15 is a schematic diagram of a signal receiving device according to an embodiment of the present application. Since the principle of solving the problem by the signal receiving device is the same as the method of the embodiment of the third aspect, its specific implementation can refer to the embodiment of the third aspect, and the same contents will not be repeated.

As shown in FIG15 , a signal receiving device 1500 according to an embodiment of the present application includes:

A transmitting unit 1501 sends first information to a terminal device, wherein the first information includes at least first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information for indicating a second time domain resource and/or a second frequency domain resource;

The receiving unit 1502 receives a second signal sent by the terminal device on the first time domain resource and/or the first frequency domain resource; the second signal is a signal formed by the terminal device through backscattering the first waveform. signal or a signal generated autonomously by the terminal device.

For the implementation of the above-mentioned features, please refer to the embodiment of the first aspect and will not be repeated here.

It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The signal receiving device 1500 of the embodiment of the present application may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

In addition, for the sake of simplicity, FIG15 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

Embodiments of the fifth aspect

An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the first to fourth aspects of the embodiments will not be repeated.

In some embodiments, the communication system 100 may include at least: a network device 101 and/or a terminal device 102, wherein the network device 101 includes the signal receiving device 1500 in the embodiment of the fourth aspect, and the terminal device 102 includes the signal sending device 1300 in the embodiment of the second aspect, which will not be repeated here.

An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

Figure 16 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 16 , network device 1600 may include a processor 1610 (e.g., a central processing unit (CPU)) and a memory 1620; memory 1620 is coupled to processor 1610. Memory 1620 may store various data and may also store an information processing program 1630, which is executed under the control of processor 1610.

For example, the processor 1610 may be configured to execute a program to implement the method described in the embodiment of the third aspect.

In addition, as shown in FIG16 , the network device 1600 may further include: a transceiver 1640 and an antenna 1650, etc. The functions of the above components are similar to those in the prior art and will not be described in detail here. 1600 does not necessarily have to include all the components shown in FIG. 16 ; in addition, the network device 1600 may also include components not shown in FIG. 16 , and reference may be made to the prior art.

The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

Figure 17 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 17 , terminal device 1700 may include a processor 1710 and a memory 1720. Memory 1720 stores data and programs and is coupled to processor 1710. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

For example, the processor 1710 may be configured to execute a program to implement the method described in the embodiment of the first aspect.

As shown in Figure 17 , the terminal device 1700 may further include: a communication module 1730, an input device 1740, a display 1750, and a power supply 1760. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 1700 does not necessarily include all of the components shown in Figure 17 , and these components are not essential. Furthermore, the terminal device 1700 may also include components not shown in Figure 17 , for which reference may be made to the prior art.

An embodiment of the present application also provides a computer-readable program, wherein when the program is executed in a signal sending device or a network device, the program enables a computer to execute the method described in the embodiment of the third aspect in the signal sending device or the network device.

An embodiment of the present application further provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the embodiment of the third aspect in a signal sending device or a network device.

An embodiment of the present application also provides a computer-readable program, wherein when the program is executed in a signal sending device or a terminal device, the program enables a computer to execute the method described in the embodiment of the first aspect in the signal sending device or the terminal device.

An embodiment of the present application further provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the embodiment of the first aspect in a signal sending device or a terminal device.

The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The logic component is, for example, a field programmable logic component, a microprocessor, a processor used in a computer, etc. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

The method/device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and/or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

One or more of the functional blocks and/or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and/or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

Claims (20)

A signal sending device, applied to a terminal device, comprising: A receiving unit, configured to receive first information sent by a network device; wherein the first information includes at least first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information for indicating a second time domain resource and/or a second frequency domain resource; a transmitting unit configured to send a second signal on the first time domain resource and/or the first frequency domain resource, and/or backscatter a first waveform on the second time domain resource and/or the second frequency domain resource; The second signal is a signal formed by the terminal device through backscattering the first waveform or a signal autonomously generated by the terminal device. The apparatus according to claim 1, wherein the first time domain resource is determined at least according to the first indication information and/or the second time domain resource and/or the second indication information and/or a predefined manner. The apparatus according to claim 1, wherein the first indication information includes information indicating one or more of the following: an index of the first time domain resource; one or more starting positions of the first time domain resource; one or more end positions of the first time domain resource; one or more durations of the first time domain resource; a period of the first time domain resource; one or more offsets of the first time domain resource; the number of the first time domain resources; and/or, The second indication information includes information indicating one or more of the following: an index of the second time domain resource; one or more starting positions of the second time domain resource; one or more end positions of the second time domain resource; one or more durations of the second time domain resource; a period of the second time domain resource; one or more offsets of the second time domain resource; The number of the second time domain resources. The apparatus according to claim 3, wherein the starting position and/or the ending position and/or the duration and/or the period and/or the offset are indicated in units of a first time unit, and the first time unit comprises an absolute time unit or a predefined time unit. The apparatus according to claim 4, wherein the start and/or the offset includes a first number of first time units, the transmitter sends the second signal on a first time domain resource after the first number of first time units after a first time point, and the first time point includes: receiving a starting position or an ending position of a third time domain resource of the first information; or the starting position or ending position of the first time domain resource or the second time domain resource preceding the first time domain resource; or a starting position or an ending position of a fourth time domain resource for receiving a downlink signal or information; or the starting position or the ending position of the fifth time domain resource of the downlink channel; or The starting position of the corresponding cycle. The apparatus according to claim 3, wherein the starting position of the cycle comprises: receiving a starting position or an ending position of a third time domain resource of the first information; or, the starting position of the first first time domain resource or the first second time domain resource; or, The position of the first time unit after the thirteenth number of first time units after the starting position or the ending position of the third time domain resource of the first information is received. The device according to claim 3, wherein the number of the first time domain resources in the first indication information is at most the second number, and/or the number of the offsets is at most the third number, and/or the starting number is at most the fourth number, and/or the ending or duration number is at most the fifth number, and at least two of the second number, the third number, the fourth number and the fifth number are the same or different. The device according to claim 1, wherein the first frequency domain resource is determined at least based on the first indication information and/or the channel of other signals or channels and/or a predefined manner and/or the second indication information and/or the second frequency domain resource. The apparatus according to claim 8, wherein the other signal or channel comprises: a channel for receiving the first information, or the channel of the most recent downlink signal or information received before sending the second signal, or The channel where the signal or information was last sent; the channel where the first waveform is located; The channel where the downlink synchronization signal and/or broadcast channel is located. The apparatus according to claim 8, wherein the first frequency domain resource is the same as the second frequency domain resource. The device according to claim 1, wherein The receiving unit is also used to receive third information sent by the network device, and the third information at least includes third indication information for indicating the third time domain resources and/or third frequency domain resources for receiving the first information, and/or group information, and/or one or more device identifiers, and/or a downlink information identifier for indicating that the first information is used for scheduling resources. The apparatus according to claim 1 or 11, wherein the first information further includes: One or more device identifiers, and/or group information, and/or control information, and/or a downlink information identifier for indicating that the first information is for scheduling resources, and/or third indication information for indicating a third time domain resource and/or a third frequency domain resource of one or more first information after receiving the first information. The apparatus according to claim 12, wherein the receiver receives multiple first information, the first first information at least including the group information, multiple device identifiers, and first indication information for indicating multiple first time domain resources and/or multiple first frequency domain resources, and/or second indication information for indicating multiple second time domain resources and/or multiple second frequency domain resources; and/or, The receiver receives multiple first information, where the first first information includes at least the group information, a device identifier, first indication information indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information indicating a second time domain resource and/or a second frequency domain resource, and third indication information of a third time domain resource and/or a third frequency domain resource of one or all other first information; and/or The receiver receives third information and multiple first information, where the third information includes group information, third indication information indicating a third time domain resource and/or a third frequency domain resource for receiving the multiple first information, each of the first information includes at least one device identifier, first indication information corresponding to the one device identifier indicating the first time domain resource and/or the first frequency domain resource, and/or second indication information indicating the second time domain resource and/or the second frequency domain resource; and/or, The receiver receives third information and multiple first information, the third information including group information for indicating third indication information of a third time domain resource and/or a third frequency domain resource for receiving the multiple first information, multiple device identifiers, each of the first information including at least a first indication information of a first time domain resource and/or a first frequency domain resource. and/or, second indication information for indicating a second time domain resource and/or a second frequency domain resource; The receiver receives third information and first information, and the third information and/or the first information include group information, and/or multiple device identifiers; the third information also includes third indication information for indicating a third time domain resource and/or a third frequency domain resource for receiving the first information, and the first information includes first indication information for indicating multiple first time domain resources and/or multiple first frequency domain resources, and/or second indication information for indicating multiple second time domain resources and/or multiple second frequency domain resources. The apparatus according to claim 12, wherein at least two of the multiple device identifiers are different. The apparatus according to claim 13, wherein the transmitter determines a device identifier corresponding to the terminal device in the first information or the third information, and the transmitter sends a second signal on a first time domain resource and/or a first frequency domain resource corresponding to the device identifier. The apparatus according to claim 1, wherein the first information and/or the third information is related to a device identification. The apparatus according to claim 12, wherein the device identifier is reported by the terminal device to the network device and/or is allocated by the network device. The device according to claim 1 or 11, wherein The receiving unit receives the first information in a first state; and/or The transmitting unit sends the second signal in the second state; and/or The receiving unit receives the third information in a third state. The device according to claim 1 or 11, wherein the first information is carried by a first channel, and/or the second signal is carried by a second channel, and/or the third information is carried by a third channel. A signal receiving device, applied to a network device, comprising: A transmitting unit, which sends first information to a terminal device; wherein the first information includes at least first indication information for indicating a first time domain resource and/or a first frequency domain resource, and/or second indication information for indicating a second time domain resource and/or a second frequency domain resource; a receiving unit, configured to receive a second signal sent by the terminal device on the first time domain resource and/or the first frequency domain resource; The second signal is a signal formed by the terminal device through backscattering the first waveform or a signal autonomously generated by the terminal device.