Information indication method and device, communication equipment and storage medium

Abstract

The invention discloses an information indication method and device, communication equipment and a storage medium, and belongs to the technical field of communication, and the information indication method comprises the steps that first equipment determines first information based on a first signal, and the first information is used for indicating a signal coding or modulation scheme of reflection equipment; the first equipment indicates the first information; wherein the first signal comprises a second signal sent by a reflection device or a third signal sent by a second device; the first device is a receiving device of the main link and the secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the main link.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to an information indication method, device, communication equipment and storage medium. Background Art

[0002] The symbiotic communication system consists of a primary system and a secondary system. The primary system and the secondary system transmit mutually. The primary system provides spectrum, energy and infrastructure communication resources to the secondary system, and the secondary system provides reflection multipath for the primary system's RF signal in the reflection space. The reflection device, as the transmitting device of the secondary system, can send the bit information to be sent to the receiving end through the backscattered signal. The receiving end receives the signals from the primary system and the secondary system and demodulates them.

[0003] However, during the transmission of the backscattered signal, the backscattered signal will experience losses related to non-ideal factors such as double channel fading and reflection modulation devices. The signal strength of the secondary system received by the receiving device is much smaller than the signal strength of the primary system. Therefore, the reflection device can consider using multi-antenna technology or reflection amplifiers to improve the signal strength of the secondary system. However, technologies such as multi-antennas or reflection amplifiers will bring additional hardware complexity. Collaborative modulation of the primary and secondary systems can effectively improve the signal strength of the secondary system while avoiding increasing the hardware complexity of the reflection device. However, there is currently no clear solution for how to achieve collaborative modulation of the primary and secondary systems. Summary of the invention

[0004] The embodiments of the present application provide an information indication method, apparatus, communication device and storage medium, which can indicate the signal coding or modulation scheme of the reflection device and realize the collaborative modulation of the primary and secondary systems.

[0005] In a first aspect, an information indication method is provided, comprising:

[0006] The first device determines first information based on the first signal, wherein the first information is used to indicate a signal coding or modulation scheme of the reflection device;

[0007] The first device indicates the first information;

[0008] Wherein, the first signal includes the second signal sent by the reflection device or the third signal sent by the second device;

[0009] The first device is a receiving device of a primary link and a secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

[0010] In a second aspect, an information indication method is provided, comprising:

[0011] The reflection device receives the first information;

[0012] The reflection device performs signal encoding or modulation based on the first information;

[0013] The first information is determined based on a first signal, and the first signal includes a second signal sent by the reflection device or a third signal sent by the second device;

[0014] The first device is a receiving device of a primary link and a secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

[0015] In a third aspect, an information indication device is provided, comprising:

[0016] A determination module, configured to determine first information based on the first signal, wherein the first information is used to indicate a signal coding or modulation scheme of the reflection device;

[0017] an indication module, used for indicating the first information;

[0018] Wherein, the first signal includes the second signal sent by the reflection device or the third signal sent by the second device;

[0019] The first device is a receiving device of a primary link and a secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

[0020] In a fourth aspect, an information indication device is provided, comprising:

[0021] A third receiving module, used for receiving first information;

[0022] A processing module, configured to perform signal encoding or modulation based on the first information;

[0023] The first information is determined based on a first signal, and the first signal includes a second signal sent by a reflection device or a third signal sent by the second device;

[0024] The first device is a receiving device of a primary link and a secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

[0025] In a fifth aspect, a communication device is provided, which includes a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect or the second aspect are implemented.

[0026] In a sixth aspect, a communication device is provided, comprising a processor and a communication interface, wherein the processor is used to run a program or instruction to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect, and the communication interface is used to couple with the processor.

[0027] In the seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0028] In an eighth aspect, a wireless communication system is provided, comprising: a first device, a second device and a reflection device, wherein the first device can be used to execute the steps of the method described in the first aspect, and the reflection device can be used to execute the steps of the method described in the second aspect.

[0029] In the ninth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0030] In the tenth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0031] In an embodiment of the present application, the first device determines first information based on the first signal, where the first information is used to indicate a signal coding or modulation scheme of the reflection device. The first device indicates the first information, and the first signal includes a second signal sent by the reflection device or a third signal sent by the second device. That is, the first device can determine the first information based on the second signal sent by the reflection device or the third signal sent by the second device, indicate the signal coding or modulation of the reflection device, and implement collaborative modulation of the primary and secondary systems, so that the reflection device can cooperate with the primary system for signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A block diagram of a wireless communication system applicable to the embodiments of the present application;

[0033] Figure 2 It is a structural schematic diagram of a backscatter communication transmitting end in the related art;

[0034] Figure 3 It is a structural schematic diagram of a backscatter communication receiving end in the related art;

[0035] Figure 4A schematic diagram of a backscatter communication modulation principle in the related art;

[0036] Figure 5 A schematic diagram of the relationship between a reading and writing device and a response device in the related art;

[0037] Figure 6 A schematic diagram of a network architecture of a single-base backscatter communication system in the related art;

[0038] Figure 7 A schematic diagram of a network architecture of a dual-base backscatter communication system in the related art;

[0039] Figure 8 It is a structural diagram of a symbiotic communication system in the related art;

[0040] Fig. 9 A schematic diagram of a separation architecture of a symbiotic communication system in the related art;

[0041] Fig.10 A schematic diagram of an integrated architecture of a symbiotic communication system in related technologies;

[0042] Fig.11 A schematic diagram of a base station using beamforming to achieve symbiotic backscattering of a transponder in the related art;

[0043] Fig.12 This is a flowchart of an implementation method of an information indication method in an embodiment of the present application;

[0044] Fig.13 This is a flowchart of another information indication method in an embodiment of the present application;

[0045] Fig.14 In the embodiments of this application Fig.12 A schematic diagram of the structure of the corresponding information indicating device;

[0046] Fig.15 In the embodiments of this application Fig.13 A schematic diagram of the structure of the corresponding information indicating device;

[0047] Fig.16 This is a schematic diagram of the structure of a communication device in an embodiment of the present application;

[0048] Fig.17 This is a schematic diagram of the structure of a terminal in an embodiment of the present application;

[0049] Fig.18 This is a schematic diagram of the structure of a network side device in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0051] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0052] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0053] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0054] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B, a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0055] To facilitate understanding, the relevant technologies and concepts involved in the embodiments of the present application are first explained.

[0056] 1. Backscatter Communication (BSC) and Ultra-Low Power Communication

[0057] In a radio frequency identification (RFID) system, a transponder device, such as a tag, can receive control signals or carrier signals from a read / write device, such as a reader, and modulate the data to be transmitted onto the carrier signal and send it out according to the instructions.

[0058] Types of answering machines include the following:

[0059] One is a passive transponder, such as a tag device belonging to a passive Internet of Things (IoT) device (Passive-IoT). This type of transponder does not have energy storage capacitors or batteries, and relies on radio frequency (RF) signals for energy supply. The received RF signal is the power signal of the rectifier. It does not have the ability to generate carrier waves and has the lowest power consumption.

[0060] The other is a semi-passive answering device, which has energy storage capacitors or batteries and relies on non-RF signals to store energy. Optionally, this type of answering device is equipped with a power amplifier (PA) or a low noise amplifier (LNA) or other active devices. Its downlink reception or uplink reflection has a certain amplification capability, but does not have the ability to generate carrier waves, and its power consumption is second only to that of other devices.

[0061] Another type is an active transponder device, such as an active tag device. This type of transponder device has the ability to actively send, is equipped with a storage capacitor or a storage battery, relies on non-RF signals for power supply, and can send information to a base station or a reader / writer device without relying on the reflection of the incident signal. It has the ability to generate carrier waves and consumes the most power.

[0062] Backscatter communication is widely used in RFID systems. In backscatter communication, backscatter communication devices can use radio frequency signals from other devices or the environment to modulate signals to transmit their own information. Backscatter communication devices can include passive transponders and semi-passive transponders. If an active transponder has the ability to generate a carrier wave, but does not generate a carrier wave signal autonomously, but reflects the incident signal to send information to a base station or a reader / writer, then the backscatter communication device can also include an active transponder.

[0063] like Figure 2 FIG. 1 is a schematic diagram of the structure of a backscatter communication transmitter, i.e., a backscatter communication device, and its basic components and main functions include:

[0064] Antenna unit: used to receive incident RF signals and control commands, and also used to send modulated backscatter signals.

[0065] Energy harvester module or battery module: used for backscatter communication equipment to harvest radio frequency energy or other energy, including but not limited to solar energy, kinetic energy, mechanical energy, thermal energy, etc. In addition to the energy harvester module, it may also include a battery power supply module. In this case, the backscatter communication equipment is a semi-passive transponder. The energy harvester module or battery power supply module supplies power to all other modules in the device;

[0066] Micro-controller: used to control baseband signal processing, energy storage or data scheduling status, switch switching, system synchronization, etc.

[0067] Signal receiving (Information Receiver) module: used to demodulate the control commands or data sent by the backscatter communication receiving end or other network nodes;

[0068] Channel Coding & Modulation Block: used to perform channel coding and signal modulation under the control of the microcontroller, and to achieve modulation by selecting different load impedances through a selection switch under the control of the microcontroller;

[0069] Memory or sensing module: used to store device ID information, location information or sensor data, etc.

[0070] In addition to the above-mentioned basic components, the backscatter communication transmitter may also integrate a tunnel diode amplifier module, a low noise amplifier module, etc., to improve the receiving sensitivity and transmission power of the backscatter communication transmitter.

[0071] Figure 3 The figure is a schematic diagram of the structure of a backscatter communication receiving end. In a traditional RFID system, the backscatter communication receiving end can be a read-write device, such as a reader or reader. Its basic components and main functions include:

[0072] Antenna unit: used to receive modulated backscatter signals (Modulation backscatter signals).

[0073] Backscatter signal detection module: used to detect the backscatter signal sent by the backscatter communication transmitter, such as amplitude shift keying (ASK) detection, phase shift keying (PSK) detection, frequency shift keying (FSK) detection or quadrature amplitude modulation (QAM) detection. The detection process may include envelope averaging, threshold calculation, comparison, etc.

[0074] Demodulation & Decoder module: used to decode the detected signal to restore the original information stream (Original data).

[0075] Figure 4The figure shows the schematic diagram of the modulation principle of backscatter communication. The backscatter communication device controls the reflection coefficient Γ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation. The reflection coefficient of the signal can be characterized as:

[0076]

[0077] Where Z0 is the antenna characteristic impedance and Z1 is the load impedance. Assume that the input RF signal is S in (t), then the modulated backscattered signal output is The reflection coefficient (Γ T =Γ0、Γ T =Γ1、Γ T =Γ2, ..., Γ T =Γ n ), the corresponding amplitude modulation, frequency modulation or phase modulation can be realized by using the channel coding and modulation module. The controller can control the reflection coefficient according to the following relationship:

[0078] The symbol 0 corresponds to an impedance of 0;

[0079] Symbol 1 corresponds to impedance 1;

[0080] Symbol 2 corresponds to impedance 2;

[0081] …

[0082] The symbol n corresponds to impedance n.

[0083] 2. Information transmission between RFID reading and writing devices, such as gNB / reader and transponder devices, such as tags

[0084] like Figure 5 As shown, the read / write device can send signaling such as selection (Select), inventory (Inventory) and access (Access) to the answering device, and the status of the answering device side can include ready (Ready), arbitration (Arbitrate), reply (Reply), response (Acknowledged), open (Open), secure (Secured), stopped (killed), etc.

[0085] In the inventory mode, the read / write device selects the answering device, sends a query command (Query), and the answering device responds (Relay), that is, generates a 16-bit random number to the read / write device, and then the read / write device sends the random number sequence to the answering device through the confirmation response command (ACK). The answering device sends the relevant data to the read / write device, such as the protocol control word (PC) / extended protocol control word (XPC), electronic product code (EPC), data packet cyclic redundancy check (CRC) (PacketCRC), etc. If the EPC is valid, the read / write device can send a repeated query command (QueryRep) or other commands. If the EPC is invalid, the read / write device can send a negative acknowledgment (NAK). From the read / write device sending the query command to the read / write device receiving the relevant data sent by the answering device is a single answering device response process.

[0086] 3. Different Backscatter Communication System Architectures

[0087] Figure 6 The figure shows a schematic diagram of the network architecture of a monostation backscatter communication system (MBCS). The traditional RFID system is a typical MBCS architecture. MBCS includes a reading and writing device and a response device, the response device is a backscatter communication transmitter, such as a tag device, and the reading and writing device is a reader. The reading and writing device includes an RF source and a backscatter communication receiver, wherein the RF source is used to generate an RF signal to power the backscatter communication transmitter, the backscatter communication transmitter backscatters the modulated RF signal, and the backscatter communication receiver in the reading and writing device receives the backscatter signal and performs signal demodulation. Since the RF source and the backscatter communication receiver are in the same device, such as the reading and writing device here, the corresponding system is called a monostation backscatter communication system. In addition, in MBCS, since the RF signal sent from the backscatter communication transmitter will cause a double near-far effect due to the signal attenuation of the round-trip signal, resulting in a large signal energy attenuation, MBCS is generally used for short-distance backscatter communication, such as traditional RFID applications.

[0088] Different from MBCS, the RF source, backscatter communication transmitter and backscatter communication receiver in the bistation backscatter communication system (BBCS) are separate and not in the same device. Figure 7 As shown. Therefore, BBCS avoids the problem of large round-trip signal attenuation. In addition, the performance of BBCS can be further improved by properly placing the RF source. It is worth noting that the ambient backscatter communication system (ABCS) is a type of dual-base backscatter communication system. However, unlike the dedicated signal RF source in BBCS, the RF source in ABCS can be an available RF source in the environment, such as a TV tower, cellular base station, WiFi signal, Bluetooth signal, etc.

[0089] 4. Symbiotic Communication System

[0090] The realization of the symbiotic communication system requires the support of a series of key technologies, including backscatter communication technology and symbiotic wireless communication transmission technology.

[0091] like Figure 8 As shown in the figure, the symbiotic communication system consists of a main system and a secondary system. The main system includes a main system transmitter (PTx) and a main system receiver (PRx), and the secondary system includes a secondary system transmitter (PTx) and a secondary system receiver (SRx). The secondary system uses the radio frequency signal of the main system for passive backscatter transmission to achieve the purpose of transmitting the secondary system's own information, which can reduce communication power consumption and save spectrum resources. At the same time, the secondary system can provide beneficial multipath components for the main system, which can improve the transmission performance of the main system to a certain extent. That is, the main system provides spectrum, energy and infrastructure communication resources for the secondary system, and the secondary system provides it with reflected multipath by reflecting the radio frequency signal of the main system in the space, and the main system and the secondary system are reciprocal transmission.

[0092] like Fig. 9 As shown in FIG. 1 , it is a schematic diagram of the split architecture of the symbiotic communication system. In the split architecture, the secondary system receiving end (SRx) is separated from the primary system receiving end (PRx) and is not in the same device. Fig.10 As shown, it is a schematic diagram of the integrated architecture of the symbiotic communication system. In the integrated architecture, the secondary system receiving end (SRx) and the main system receiving end (PRx) are integrated in the receiving device (IRx), supporting the simultaneous reception of data from the main system transmitting end (PTx) and the secondary system transmitting end (STx).

[0093] Assume that the symbol transmitted by the primary system transmitter is s(n), and its symbol period is Ts, and the symbol transmitted by the secondary system transmitter, i.e., the backscatter communication device, is c(n), and its symbol period is Tc. Where, Tc = L × Ts, and L is the spreading factor of the secondary system. It can be seen that the larger L is, the smaller the change in the waveform characteristics of the primary system by the secondary link corresponding to the secondary system, i.e., the backscatter link, and the more obvious the multipath gain obtained by the primary system, but the smaller the amount of data that can be carried by the secondary system transmitter per unit time.

[0094] In the physical implementation of symbiotic communication, the primary system can still use existing wireless communication technology for active transmission, while the secondary system needs to use backscatter communication technology for transmission. In the process of backscatter signal transmission, the signal will experience double channel fading and loss related to the reflection modulation device, and the signal strength of the secondary system received by IRx is much smaller than the signal strength of the primary system. Therefore, backscatter communication equipment can consider using multi-antenna technology or reflection amplifiers to improve the received signal strength of the backscatter communication system.

[0095] 5. Collaborative modulation between primary and secondary systems

[0096] IRx needs to jointly detect the primary system signal and the secondary system signal. The secondary system signal is also the backscattered signal. Generally, a coherent reception algorithm is used, such as the maximum likelihood (ML) detection algorithm, the linear detection algorithm (Linear Detector) and the detection algorithm based on the successive interference cancellation (SIC). These algorithms can jointly detect the primary system signal and the secondary system signal, but they have high complexity. In addition, if the signal strength of the primary system is weak or there is large-scale fading, the decoding performance of the primary system signal and the secondary system signal will be affected.

[0097] One method to enhance the main system signal is to add a constant symbol to the backscatter signal to increase the signal strength of the main system communication link. Assume that the IRx received signal expression is:

[0098] y(n)=hs(n)+gs(n)Γ(c(n))+z(n) Formula (1)

[0099] Among them, g represents the channel state information of the backscatter link of the secondary system, that is, the cascade channel of the secondary link, h represents the channel state information of the main link of the main system, z(n) is the noise obeying the complex Gaussian distribution, Γ represents the reflection coefficient of STx, s(n) represents the signal sent by PTx, and c(n) is the modulation bit information of the backscatter communication device.

[0100] Considering the reflection coefficient after STx modulation:

[0101]

[0102] Among them, α is a constant and βc is a variable. When STx is a passive response device, |Γ pro (c(n))|≤1; when STx is a semi-passive transponder and is equipped with a reflective amplifier, |Γ pro (c(n))|>1.

[0103] Substituting formula (2) into formula (1), we can obtain:

[0104] y(n)=(h+gα)s(n)+gβs(n)c(n)+z(n)=gx(n)+z(n) Formula (3)

[0105] Where x(n) represents the composite signal of the primary system and the secondary system, which can be expressed as:

[0106] x(n)=s(n)(h / g+α+βc(n)) Formula (4)

[0107] In order to assist the main system signal, α should be in phase with h / g, that is:

[0108] ∠α=∠(h / g) Formula (5)

[0109] 6. Backscatter signal transmission method based on beamforming

[0110] If the base station (gNB) knows the direction or location of the answering device, the base station can use beamforming to realize the signal transmission of the answering device, such as the tag device which is a passive IoT device, such as Fig.11 shown.

[0111] After beamforming, IRx, i.e., the signal y(n) received by the terminal, can be approximated as:

[0112] y(n)≈h3c(n)s(n)+w(n) formula (6)

[0113] Wherein, w(n) represents the noise signal, and h3 represents the backscatter channel state information of the secondary system.

[0114] It can be seen that the benefit of using beamforming to achieve signal transmission of the answering device is to increase the communication range of the answering device and effectively collect energy.

[0115] The above is an introduction to the relevant technologies and concepts involved in the embodiments of the present application. The following is a detailed description of the information indication method provided by the embodiments of the present application through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0116] The technical solution provided in the embodiments of the present application can be applied to scenarios such as backscatter communication or symbiotic communication, such as item inventory, logistics inventory, fire warning, virtual reality glasses, motion status monitoring, health status monitoring, etc. It can also be applied to RFID dedicated readers, WiFi transmission scenarios, gNB transmission scenarios or next-generation mobile communication scenarios.

[0117] See also Fig.12 FIG. 1 is a flowchart of an implementation method of an information indication method provided in an embodiment of the present application, and the method includes the following steps:

[0118] S1210: The first device determines first information based on the first signal, where the first information is used to indicate a signal coding or modulation scheme of the reflection device.

[0119] The first signal includes the second signal sent by the reflection device or the third signal sent by the second device.

[0120] In the embodiment of the present application, the first device is a receiving device for the primary link and the secondary link, the reflection device is a sending device for the secondary link, and the second device is a sending device for the primary link. In the symbiotic communication system, the primary link is a link corresponding to the primary system, and the secondary link is a link corresponding to the secondary system. In the traditional backscatter communication system, the primary link is a direct link, and the secondary link is a backscatter link. Among them, the channel of the secondary link is a cascade channel.

[0121] For the convenience of description, the technical solution provided in the embodiment of the present application is explained mainly based on the symbiotic communication system.

[0122] In the centralized architecture of the symbiotic communication system, the device types of the first device, the reflection device, and the second device include the following:

[0123] 1) The first device is a terminal, the reflective device is a response device, and the second device is a base station or a read-write device;

[0124] 2) The first device is a base station or a read-write device, the reflective device is a transponder, and the second device is a base station or a read-write device different from the first device;

[0125] 3) The first device is a base station or a read / write device, the reflective device is a response device, and the second device is a terminal;

[0126] 4) The first device is a terminal, the reflection device is a response device, and the second device is a terminal different from the first device.

[0127] In the separated architecture of the symbiotic communication system, the second device is a base station or a read-write device or a terminal, the reflection device is a response device, and the first device is a receiving device of the primary system or a receiving device of the secondary system, which is a base station or a read-write device or a terminal different from the second device.

[0128] The reflection device in the embodiment of the present application may also be called a backscatter communication device, including a passive answering device and a semi-passive answering device. For an active answering device, although it has the ability to generate a carrier signal autonomously, if it can still modulate and generate a backscatter signal based on a carrier signal sent by a read-write device or other device, then the answering device in the embodiment of the present application may also include an active answering device. Of course, this classification of answering devices is not unique and definite, and here it is only classified according to some characteristics.

[0129] The first device receives a first signal, the first signal including a second signal sent by the reflection device or a third signal sent by the second device. The first device determines first information based on the first signal, the first information being used to indicate a signal coding or modulation scheme of the reflection device.

[0130] S1220: The first device indicates first information.

[0131] The first device indicates the first information after determining the first information based on the second signal sent by the reflection device or the third signal sent by the second device. The first information indicated by the first device eventually reaches the reflection device, and after receiving the first information, the reflection device performs signal encoding or modulation based on the first information.

[0132] Using the method provided in the embodiment of the present application, the first device determines the first information based on the first signal, and the first information is used to indicate the signal coding or modulation scheme of the reflection device. The first device indicates the first information, and the first signal includes the second signal sent by the reflection device or the third signal sent by the second device. That is, the first device determines the first information based on the second signal sent by the reflection device or the third signal sent by the second device, indicates the signal coding or modulation of the reflection device, and realizes collaborative modulation of the primary and secondary systems, so that the reflection device can cooperate with the primary system for signal transmission.

[0133] In some embodiments of the present application, optionally, the first information is used to indicate a signal coding or modulation scheme of the reflection device within a coherence time. The coherence time refers to the maximum time range in which a channel remains constant.

[0134] Optionally, the reflection device performs signal encoding or modulation within the coherence time based on the first information.

[0135] The first device indicating the first information may be: the first device sends the first information to the reflection device, that is, the reflection device receives the first information from the first device; or it may be: the first device sends the first information to the reflection device through the second device, such as sending the first information to the second device, and then the second device sends the first information to the reflection device, that is, the reflection device receives the first information from the second device.

[0136] Optionally, the first device may explicitly indicate the first information, such as the first device directly carries indication information related to the first information through a signal, and the reflection device may obtain the first information after receiving the indication.

[0137] Optionally, the first device may implicitly indicate the first information, such as by indicating the first information through the number of preamble code bits. After receiving the indication, the reflection device demodulates the number of preamble code bits and obtains the corresponding first information by calculating an agreed expression.

[0138] Optionally, the first information is used to indicate a signal coding or modulation scheme of the reflection device to cooperate with the second device for signal transmission.

[0139] In some embodiments of the present application, the first information may include at least one of the following:

[0140] Modulation set information;

[0141] Index information of the modulation set;

[0142] Modulation phase information;

[0143] Modulation amplitude information;

[0144] Indicative form information;

[0145] The modulation set includes at least two items of a modulation mode, a modulation rate, a modulation phase and a modulation amplitude having a mapping relationship.

[0146] The indication form information may include the indication form of each information included in the first information, for example, indicating the modulation phase information through the index of the modulation set, and directly indicating the modulation amplitude information.

[0147] The first information includes at least one of the above items, which can enable the reflection device to effectively perform signal encoding or modulation based on the first information to cooperate with the second device to perform signal transmission.

[0148] In some embodiments of the present application, when the first signal includes the second signal and the third signal, the first device determines the first information based on the first signal, which may include the following steps:

[0149] Step 1: The first device estimates first channel state information of the secondary link based on the second signal;

[0150] Step 2: The first device estimates second channel state information of the primary link based on the third signal;

[0151] Step three: The first device determines the first information according to the first channel state information and the second channel state information.

[0152] For the convenience of description, the above three steps are combined for explanation.

[0153] In an embodiment of the present application, the first signal received by the first device may include a second signal sent by the reflection device and a third signal sent by the second device. The second signal may be a backscatter signal, and the third signal may be a reference signal, such as a channel state information reference signal (Channel State Information-Reference Signal, CSI-RS). The second device may send the third signal to the first device and the reflection device, and the reflection device may receive the third signal, modulate the third signal to generate a second signal, and send the second signal to the first device.

[0154] Based on the second signal, the first device can measure the downlink channel characteristics of the secondary link and estimate the first channel state information h of the secondary link. Based on the third signal, the first device can measure the downlink channel characteristics of the main link and estimate the second channel state information g of the main link.

[0155] The first device can determine the first information according to the first channel state information and the second channel state information. The first information should satisfy the first condition, which is the relationship represented by formula (5) in the related technology involved in the embodiment of the present application.

[0156] The first device estimates the channel state information of the secondary link and the primary link respectively based on the second signal and the third signal, and then determines the first information according to the channel state information, which can improve the accuracy of determining the first information and help improve the effectiveness of the first information indication.

[0157] It should be noted that in the separated architecture of the symbiotic communication system, the first device can be a receiving device of the main system or a receiving device of the secondary system, the reflection device is a sending device of the secondary system, and the second device is a sending device of the main system. Several possible implementation processes are:

[0158] 1) A receiving device of the primary system receives a second signal sent by the reflection device and a third signal sent by the second device, estimates first channel state information of the secondary link and second channel state information of the primary link respectively, and determines first information according to the first channel state information and the second channel state information;

[0159] 2) The receiving device of the secondary system receives the second signal sent by the reflection device and the third signal sent by the second device, estimates the first channel state information of the secondary link and the second channel state information of the primary link respectively, and determines the first information according to the first channel state information and the second channel state information;

[0160] 3) The receiving device of the primary system receives the second signal sent by the reflection device, estimates the first channel state information of the secondary link, the receiving device of the secondary system receives the third signal sent by the second device, estimates the second channel state information of the primary link, the receiving device of the primary system and the receiving device of the secondary system share their respective estimated channel state information, and the receiving device of the primary system or the receiving device of the secondary system determines the first information according to the first channel state information and the second channel state information;

[0161] 4) The receiving device of the main system receives the third signal sent by the second device and estimates the second channel state information of the main link. The receiving device of the secondary system receives the second signal sent by the reflection device and estimates the first channel state information of the secondary link. The receiving device of the main system and the receiving device of the secondary system share their respective estimated channel state information. The receiving device of the main system or the receiving device of the secondary system determines the first information based on the first channel state information and the second channel state information.

[0162] In some embodiments of the present application, before the first device determines the first information based on the first signal, the method may further include the following steps:

[0163] The first device receives the second signal and the third signal by one of the following methods:

[0164] Time division method, frequency division method, and code division method.

[0165] In an embodiment of the present application, the first signal includes a second signal sent by a reflection device and a third signal sent by the second device, and the first device can receive the second signal and the third signal in one of a time division method, a frequency division method, and a code division method.

[0166] When the first device is to estimate the channel of the primary link, it may instruct the reflection device to send a first bit, such as bit 0, to absorb the signal. When the first device is to estimate the channel of the secondary link, it may instruct the reflection device to send a second bit, such as bit 1, to reflect the signal. The first device combines the signals received at the two times to perform channel estimation.

[0167] Alternatively, the first device may instruct the reflection device to perform frequency shifting, receive the second signal and the third signal at two frequency points respectively, and perform channel estimation of the primary link and the secondary link respectively;

[0168] Alternatively, the first device may instruct the reflection device to perform spectrum spreading so that the received signal of the main link, ie, the third signal, and the received signal of the secondary link, ie, the second signal, are orthogonal in the code domain.

[0169] The first device receives the second signal and the third signal by one of time division, frequency division, and code division, and can effectively distinguish the second signal from the third signal to accurately determine the first information based on the second signal and the third signal.

[0170] In some embodiments of the present application, there are multiple second signals and multiple third signals respectively, different beams are sent in different directions, one or more third signals are configured in each beam direction, and each second signal is a signal modulated and reflected based on the corresponding third signal;

[0171] The first device estimating first channel state information of the secondary link based on the second signal may include the following steps:

[0172] The first device estimates first channel state information of a secondary link corresponding to each beam based on a second signal corresponding to each beam;

[0173] The first device estimating second channel state information of the primary link based on the third signal may include the following steps:

[0174] The first device estimates second channel state information of a main link corresponding to each beam based on a third signal corresponding to each beam;

[0175] The first device determines the first information according to the first channel state information and the second channel state information, which may include the following steps:

[0176] The first device determines the first information corresponding to each beam according to the first channel state information and the second channel state information corresponding to each beam.

[0177] In the embodiment of the present application, the second device is a transmitting device of the main link, and can transmit multiple beams, and different beams are transmitted in different directions. Each beam direction is configured with a set of shaped third signals, and the set of third signals includes one or more third signals, which are used for beam measurement of the reflection device and the first device, and the direction shaped by each third signal is the same as the corresponding beam direction. The third signal can be a reference signal.

[0178] After receiving the third signal, the reflecting device may modulate and generate a corresponding second signal based on each third signal, and send the second signal to the first device. The second signal may be a backscattered signal.

[0179] For example, the second device sends two beams in different directions, beam #1 and beam #2. Beam #1 is configured with third signal 1 and third signal 2 corresponding to the beam direction, and beam #2 is configured with third signal 3 corresponding to the beam direction. The reflecting device modulates and generates a corresponding second signal based on each third signal, such as modulating and generating second signal 1 based on third signal 1, modulating and generating second signal 2 based on third signal 2, and modulating and generating second signal 3 based on third signal 3. Beam #1 corresponds to second signal 1 and second signal 2, and beam #2 corresponds to second signal 3.

[0180] The first signal received by the first device may include multiple second signals and multiple third signals. Based on the second signal corresponding to each beam, the first channel state information of the secondary link corresponding to each beam can be estimated. Based on the third signal corresponding to each beam, the second channel state information of the main link corresponding to each beam can be estimated. In this way, the second channel state information of the main link and the first channel state information of the secondary link corresponding to each beam can be obtained.

[0181] The first device can determine the first information corresponding to each beam according to the first channel state information and the second channel state information corresponding to each beam, which helps the reflection device to perform signal encoding or modulation based on the corresponding first information in different beams.

[0182] In some embodiments of the present application, when the first signal includes the second signal, there are multiple second signals, each second signal is a signal modulated and reflected based on the second information and the fourth signal sent by the second device, different second signals correspond to different second information or fourth signals, different beams are sent in different directions, each beam direction is configured with one or more fourth signals, and different fourth signals are transmitted on different time-frequency resources;

[0183] The first device determines the first information based on the first signal, which may include the following steps:

[0184] The first step: the first device determines a plurality of measurement quantities corresponding to the reference indicator of each beam based on a plurality of second signals corresponding to each beam;

[0185] The second step: the first device determines the first information corresponding to each beam according to the multiple measurement quantities corresponding to the reference indicator of each beam.

[0186] For the convenience of description, the above two steps are combined for explanation.

[0187] In an embodiment of the present application, the second device is a transmitting device of the main link, and can send multiple beams to the reflection device, and different beams are sent in different directions. Each beam direction is configured with a set of shaped fourth signals, and the set of fourth signals can include one or more fourth signals, and the direction of each fourth signal is the same as the corresponding beam direction. Different fourth signals are transmitted on different time-frequency resources to facilitate reception and identification by the reflection device. The fourth signal can be a reference signal.

[0188] After receiving the fourth signal, the reflection device can modulate and generate a corresponding second signal based on the second information and each fourth signal sent by the second device, and then send the second signal to the first device, and the second information or fourth signal corresponding to different second signals is different. The second signal can be a backscattered signal. The second information can be any one of a plurality of groups of pre-acquired information. Each of the plurality of groups of pre-acquired information can include at least one of information of a modulation set, index information of a modulation set, modulation phase information, modulation amplitude information, and indication form information, wherein the modulation set includes at least two of a modulation mode, a modulation rate, a modulation phase, and a modulation amplitude having a mapping relationship.

[0189] For the fourth signal corresponding to each beam, the reflection device can modulate the fourth signal based on each group of pre-acquired information, generate multiple second signals, and reflect them to the first device. That is, there are multiple second signals corresponding to each beam, and the second information or fourth signals corresponding to different second signals are different. The multiple groups of pre-acquired information can be predefined or pre-indicated to the reflection device.

[0190] For example, there are two groups of pre-acquired information, including second information 1 and second information 2. The second device sends two beams in different directions, beam #1 and beam #2. Beam #1 is configured with fourth signal 1 corresponding to the beam direction, and beam #2 is configured with fourth signal 2 and fourth signal 3 corresponding to the beam direction. The reflecting device modulates and generates corresponding second signals based on the second information and each fourth signal, such as modulating and generating second signal 1 based on second information 1 and fourth signal 1, modulating and generating second signal 2 based on second information 1 and fourth signal 2, modulating and generating second signal 3 based on second information 1 and fourth signal 3, modulating and generating second signal 4 based on second information 2 and fourth signal 1, modulating and generating second signal 5 based on second information 2 and fourth signal 2, and modulating and generating second signal 6 based on second information 2 and fourth signal 3. Beam #1 corresponds to second signal 1 and second signal 4, and beam #2 corresponds to second signal 2, second signal 3, second signal 5, and second signal 6.

[0191] The first signal received by the first device may include multiple second signals. Based on the multiple second signals corresponding to each beam, multiple measurement quantities corresponding to the reference indicator of each beam may be determined, and then the first information corresponding to each beam may be determined based on the multiple measurement quantities corresponding to the reference indicator of each beam. The determined first information corresponding to each beam may be considered as the optimal information among multiple groups of pre-acquired information, and may include one or more groups of information. This helps the reflection device to perform signal encoding or modulation based on the corresponding first information in different beams.

[0192] Optionally, the first device may determine the first information corresponding to each beam based on an optimal measurement quantity among multiple measurement quantities corresponding to the reference indicator of each beam.

[0193] The role of the reference indicator is that the first device can determine the first information according to the optimal reference indicator by repeatedly measuring the reference signal sent by the second device in the main link and the backscattered signal sent by the reflection device in the secondary link.

[0194] Optionally, the reference indicator may include at least one of the following:

[0195] Signal received power, such as Reference Signal Received Power (RSRP) and Received Signal Strength Indicator (RSSI);

[0196] Reliability, such as Block Error Rate (BLER) and Bit Error Rate (BER);

[0197] Signal-to-Noise Ratio (SNR);

[0198] Signal to Interference plus Noise Ratio (SINR).

[0199] In some embodiments of the present application, the first device indicating the first information may include the following steps:

[0200] The first device sends first information corresponding to each beam to the reflecting device or the second device.

[0201] In an embodiment of the present application, after the first device determines the first information corresponding to each beam, it can send the first information corresponding to each beam to the reflecting device, that is, indicate the mapping relationship between each beam and the first information to the reflecting device. The reflecting device can receive the first information corresponding to each beam, which helps the reflecting device to perform signal encoding or modulation based on the corresponding first information in different beams.

[0202] Alternatively, after the first device determines the first information corresponding to each beam, it can send the first information corresponding to each beam to the second device, that is, indicate the mapping relationship between each beam and the first information to the second device, and when the second device sends a beam to the reflection device, it can indicate the first information corresponding to the corresponding beam to the reflection device. Alternatively, after the second device receives the first information corresponding to each beam sent by the first device, it can send the first information corresponding to each beam to the reflection device, and the reflection device can receive the first information corresponding to each beam, which helps the reflection device to perform signal encoding or modulation based on the corresponding first information in different beams.

[0203] In some embodiments of the present application, the first device indicating the first information may include the following steps:

[0204] The first device indicates the optimal beam to the second device, and indicates first information corresponding to the optimal beam to the reflection device.

[0205] In the embodiment of the present application, after the first device determines the first information corresponding to each beam, it can further determine the optimal beam. Optionally, the first device can determine the optimal beam according to the beam training result.

[0206] The first device may indicate the optimal beam to the second device, and indicate the first information corresponding to the optimal beam to the reflection device, and the reflection device may receive the first information corresponding to the optimal beam, which helps the second device to use the optimal beam to send the third signal or the fourth signal, and helps the reflection device to modulate the third signal or the fourth signal based on the corresponding first information to generate the second signal.

[0207] In some embodiments of the present application, the method may further include the following steps:

[0208] Step 1: The first device receives time-frequency resource information corresponding to a specific beam configured by the second device;

[0209] Step 2: The first device receives multiple fifth signals sent by the reflection device on the time-frequency resources corresponding to the specific beam, each of the fifth signals is a signal modulated and reflected based on the third information and the sixth signal sent by the second device on the time-frequency resources corresponding to the specific beam, and different fifth signals correspond to different third information;

[0210] Step three: The first device updates the first information on the time-frequency resources corresponding to the specific beam based on multiple fifth signals.

[0211] For the convenience of description, the above three steps are combined for explanation.

[0212] It is understandable that after the channel changes, the beam may also change. In an embodiment of the present application, the second device can indicate the time-frequency resource information corresponding to the specific beam to the first device and the reflection device, and the specific beam can be any one of the multiple beams sent by the second device. After the reflection device receives the time-frequency resource information corresponding to the specific beam configured by the second device, it can send multiple fifth signals on the time-frequency resources corresponding to the specific beam, and each fifth signal is a signal modulated and reflected based on the third information and the sixth signal sent by the second device on the time-frequency resources corresponding to the specific beam. The third information corresponding to different fifth signals is different.

[0213] The third information may be any one of a plurality of sets of pre-acquired information, each of which may include at least one of modulation set information, modulation set index information, modulation phase information, modulation amplitude information, and indication form information, wherein the modulation set includes at least two of a modulation mode, a modulation rate, a modulation phase, and a modulation amplitude having a mapping relationship. The plurality of sets of pre-acquired information may be pre-defined or pre-indicated to the reflection device.

[0214] The first device can receive multiple fifth signals sent by the reflection device on the time-frequency resources corresponding to the specific beam, and then update the first information on the time-frequency resources corresponding to the specific beam based on the multiple fifth signals, so as to update the first information corresponding to the specific beam, and further indicate it to the second device or the reflection device, which helps the reflection device to perform signal encoding or modulation based on the updated first information.

[0215] The updated first information may include one or more sets of information among the multiple sets of pre-acquired information.

[0216] In some embodiments of the present application, when the first signal includes the second signal and the third signal, there are multiple second signals and multiple third signals respectively, each second signal is a signal modulated and reflected based on a third signal and fourth information, and different second signals correspond to different third signals or fourth information;

[0217] The first device determines the first information based on the first signal, which may include the following steps:

[0218] The first step: the first device determines a plurality of measurement quantities corresponding to the reference indicator based on the plurality of second signals and the plurality of third signals;

[0219] The second step: the first device determines the first information according to the multiple measurement quantities corresponding to the reference indicator.

[0220] For the convenience of description, the above two steps are combined for explanation.

[0221] In an embodiment of the present application, the first signal may include a second signal sent by a reflection device and a third signal sent by the second device, and there are multiple second signals and multiple third signals respectively. The second device sends a third signal to the first device and the reflection device, and the reflection device can modulate and generate a second signal based on each third signal and fourth information, and reflect it to the first device. The fourth information can be any one of multiple groups of pre-acquired information, and different second signals correspond to different third signals or fourth information.

[0222] Each set of information in the multiple sets of pre-acquired information may include at least one of the information of the modulation set, the index information of the modulation set, the modulation phase information, the modulation amplitude information, and the indication form information, wherein the modulation set includes at least two of the modulation mode, modulation rate, modulation phase and modulation amplitude having a mapping relationship.

[0223] That is, for each third signal, the reflection device can modulate the third signal based on each set of first information in the plurality of sets of predefined first information to generate the second signal. The plurality of sets of pre-obtained first information can be pre-defined or pre-indicated.

[0224] For example, there are three groups of pre-acquired information, including fourth information 1, fourth information 2 and fourth information 3. The third signals sent by the second device are third signal 1, third signal 2 and third signal 3 respectively. The reflection device modulates and generates a second signal based on each third signal and fourth information, such as modulating and generating second signal 1 based on third signal 1 and fourth information 1, modulating and generating second signal 2 based on third signal 2 and fourth information 2, and modulating and generating second signal 3 based on third signal 3 and fourth information 3.

[0225] After receiving the second signal and the third signal, the first device may determine multiple measurement quantities corresponding to a reference indicator, which may include at least one of signal reception power, reliability, signal-to-noise ratio, and signal-to-interference-plus-noise ratio.

[0226] The first device may determine the first information based on multiple measurement quantities corresponding to the reference indicator. Optionally, the first device may determine the first information based on the best measurement quantity among the multiple measurement quantities corresponding to the reference indicator. The first information includes one or more groups of information among multiple groups of pre-acquired information.

[0227] The first device measures multiple times the third signal sent by the second device through the main link and the second signal sent by the reflection device through the secondary link. According to the measurement values ​​obtained from the multiple measurements, the first information can be determined, which helps the subsequent reflection device to perform signal encoding or modulation based on the first information.

[0228] In some embodiments of the present application, before the first device determines the first information based on the first signal, the method may further include the following steps:

[0229] The first device receives capability information of the reflection device.

[0230] The reflective device may send capability information to the first device, or send capability information to other devices, such as the second device or other read / write devices different from the first device, and then forward it to the first device through other devices. The first device receives the capability information of the reflective device and may determine the first information according to the capability information and the received first signal, so that the determined first information can better match the capability of the reflective device.

[0231] The capability information includes at least one of the following:

[0232] 1) Carrier generation capability information, through which it can be determined whether the reflective device has carrier generation capability. A device with carrier generation capability is an active device, and a device without carrier generation capability is a passive device or a semi-passive device;

[0233] 2) Frequency deviation capability information, such as first level duration, first level switching period, frequency modulation capability of the varactor diode, and other hardware capabilities related to frequency modulation capability;

[0234] 3) Oscillator capability information, such as crystal frequency, clock frequency, oscillator stability, etc., where the crystal frequency is a reference clock source of 100 MHz, the clock frequency is a frequency shift capability of 20 MHz, and the oscillator stability is a frequency error of 100 ppm at a frequency deviation of 20 MHz;

[0235] 4) Amplification capability information, such as whether a reflection amplifier or a downlink low-noise amplifier is configured;

[0236] 5) Storage capacity information, such as memory size information, through which the maximum amount of first information that the reflection device can maintain can be known, which affects the number of beams used;

[0237] 6) Information on supported modulation methods, such as whether modulation methods such as amplitude modulation, frequency modulation, phase modulation, and high-order modulation are supported, where phase modulation may include the maximum number of constellation points that can be transmitted, i.e., the maximum modulation order;

[0238] 7) Other capability information, such as the number and value of load impedances, constellation point resolution, and error vector magnitude (EVM).

[0239] For ease of understanding, the technical solution provided by the embodiment of the present application is described below through specific examples. In the following example, the first device is IRx, the second device is PTx, and the reflection device is tag. When estimating the channel and the first information indication, it is assumed to be completed within the coherence time.

[0240] Example 1: IRx indicates the modulation parameters of the tag based on the CSI of the primary link and the secondary link

[0241] The core idea of ​​this example is that IRx measures the channel state information of the primary link and the secondary link, indicating that the Tag satisfies the first information under the first condition, and is used for the tag to be encoded or modulated according to the first information within the coherence time.

[0242] One possible process is as follows:

[0243] 1) PTx sends reference signals, such as CSI-RS;

[0244] 2) IRx measures the downlink channel characteristics of the reference signals corresponding to the primary link and the secondary link respectively and estimates the channel state information of the primary link and the secondary link; optionally, IRx may report the channel state information of the primary link and the secondary link to PTx;

[0245] 3) IRx or PTx indicates the first information to the tag;

[0246] The indication method of the first information includes an explicit indication method or an implicit indication method:

[0247] Explicit indication, for example, indication through modulation parameter indication information;

[0248] Implicit indication, for example, a tag demodulation reference signal, obtains the corresponding first information by calculating the agreed expression;

[0249] Optionally, before 1), the tag reports its capability information.

[0250] For example, PTx sends a reference signal, such as CSI-RS, for IRx to estimate the channel state information g and h of the primary link and the secondary link, respectively;

[0251] After IRx obtains the channel state information of the primary link and the secondary link, it can choose to report PTx, and PTx indicates the first information, or it can choose not to report PTx, that is, IRx indicates. Taking IRx indication as an example, the indication can be made by explicit indication or implicit indication. Taking explicit indication as an example, IRx sends the first information to the tag, and the first information includes at least one of the following contents:

[0252] Information of a modulation set, where the modulation set includes at least two items of a modulation mode, a modulation rate, a modulation phase, and a modulation amplitude having a mapping relationship;

[0253] Index information of the modulation set;

[0254] Modulation phase and modulation amplitude information, i.e., ∠α=∠(h / ), |α| and |β| in the related art;

[0255] A mixed indication form, for example, ∠α=∠(h / ) can be indicated by the index of the modulation set, and |α| and |β| can be indicated directly.

[0256] Example 2: IRx indicates the modulation scheme of the tag based on the reference index

[0257] The core idea of ​​this example is that IRx measures the reference signal sent by PTx through the main link and the backscatter signal sent by the tag through the secondary link multiple times, and determines the first information based on the reference indicator. The backscatter signal is modulated according to multiple groups of pre-acquired information after the tag receives the carrier signal or reference signal sent by PTx. The multiple groups of pre-acquired information can be predefined or pre-indicated to the tag. The first information determined according to the reference indicator includes one or more groups of information in the multiple groups of pre-acquired information.

[0258] One possible process is as follows:

[0259] 1) PTx sends N reference signals, such as N CSI-RS;

[0260] 2) IRx receives the signals of the primary link and the secondary link at time nT, and obtains N measurement quantities corresponding to the reference index, such as N SINRs. Where T is the time unit, n = 1, 2, 3, ..., N;

[0261] The secondary link signal refers to the backscatter signal. The pre-acquired information set is a set with a dimension of N, and the tag performs N modulation reflections according to the content of the pre-acquired information set;

[0262] 3) IRx determines first information from a pre-acquired information set according to N measurement quantities corresponding to the reference indicator; optionally, reports the first information to PTx;

[0263] 4) IRx or PTx indicates the first information to the tag;

[0264] The indication method of the first information includes an explicit indication method or an implicit indication method;

[0265] Optionally, before 1), the tag reports its capability information.

[0266] For example, PTx sends N reference signals, such as CSI-RS. When the tag receives the reference signal, it will be modulated according to the pre-acquired information set (N groups of information) polling. IRx receives N reference signals and N backscatter signals at N*T moments respectively, and obtains the optimal measurement quantity, for example, the optimal SINR. Optionally, IRx reports the optimal SINR or the corresponding first information to PTx. IRx or PTx indicates the first information to the tag.

[0267] Example 3: Parameter indication scheme based on beamforming

[0268] The core idea of ​​this example is that when the main channel of the main system and the cascade channel of the secondary system change rapidly, PTx binds the transmission beam index with the first information and provides an indication scheme for the first information.

[0269] 1) PTx sends N analog beams. Each analog beam direction is configured with a shaped reference signal set for beam measurement of tag and IRx. Each reference signal set includes one or more reference signals. The direction shaped by each reference signal is the same as the corresponding analog beam direction.

[0270] Optionally, PTx sends auxiliary information to IRx, for example, a Transmission Configuration Indication (TCI) state indication, each TCI state indicating a quasi co-location (QCL) pilot signal of a signal space to be received, for indicating that IRx uses a receiving beam of the pilot signal for reception;

[0271] 2) The tag receives N simulated beams sent by PTx, and obtains first information corresponding to each simulated beam or reference signal according to at least one of the following methods:

[0272] The tag sends a backscatter signal, and IRx receives N channel state information corresponding to the primary link and the secondary link, and obtains the first information corresponding to each simulated beam;

[0273] The tag sends N*M backscattered signals to IRx according to the received N simulated beams and M groups of pre-acquired information. IRx determines the first information corresponding to each simulated beam in the M groups of pre-acquired information according to a reference indicator, such as SINR. The determined first information includes one or more groups of information in the M groups of pre-acquired information.

[0274] 3) IRx reports the mapping relationship between N simulated beams and N first information to PTx or tag, and PTx indicates the first information or IRx indicates the first information:

[0275] PTx indicates the first information corresponding to the specific time-frequency resource to tag and IRx;

[0276] IRx instructs PTx to send the corresponding beam on specific time-frequency resources, and indicates the first information corresponding to the transmitted beam to tag.

[0277] This example also involves a beam update scheme, where PTx indicates to tag and IRx the sending rule of a specific beam on time-frequency resources, and tag sends M backscatter signals to IRx based on the indicated sending rule, and IRx determines the first information based on the measured amount of the reference indicator and indicates it to tag; the first information may also be reported to PTx, which is indicated by PTx, and tag sends a backscatter signal to IRx based on the indicated first information;

[0278] Optionally, before 1), the tag reports its capability information.

[0279] For example, PTx configures TCI for IRx, instructing IRx to use the receiving beam of the corresponding pilot signal for reception. PTx sends N reference signals through N beams, the tag sends a backscatter signal, IRx estimates the N channel state information corresponding to the primary link and the secondary link, and obtains the first information corresponding to each beam; or, PTx sends N reference signals through N beams, the tag sends N*M backscatter signals to IRx based on the received N beams and M groups of pre-acquired information, and IRx determines the first information corresponding to each beam in the M groups of pre-acquired information based on reference indicators such as SINR. Each beam and the corresponding reference signal are transparent to the tag and IRx.

[0280] IRx obtains N first information corresponding to N beams and reports the corresponding mapping relationship to PTx or tag. PTx or IRx instructs the first information or tag to select the first information by itself:

[0281] PTx indicates to tag and IRx the transmission rules of a specific beam on a specific time-frequency resource, and indicates the first information of the tag according to the mapping relationship reported by IRx. For example, before PTx sends the CSI-RS#3 beam on a specific time-frequency resource, it indicates to the tag the first information corresponding to the CSI-RS#3 beam, such as the first information #3. Therefore, when the tag receives CSI-RS#3, it will modulate it using the modulation method corresponding to the first information #3, and send a backscatter signal to IRx, and IRx receives the CSI-RS#3 beam and the corresponding backscatter signal;

[0282] After IRx obtains the mapping relationship, it can choose not to report, but directly indicate PTx the optimal transmit beam for IRx, and indicate the first information corresponding to the transmit beam to the tag. For example, IRx knows from the beam training results that the CSI-RS#5 transmit beam and one of its receive beams are the optimal paired beams, then IRx reports the measurement results and indicates the first information of the tag, such as the first information is the first information #4.

[0283] After considering the channel changes, the first information indication method of beam update is: PTx indicates the sending rule of a specific beam on the time-frequency resources to the tag and IRx, and the tag sends M backscattered signals to IRx based on the indicated sending rule. IRx determines the first information according to the measurement of the reference indicator and indicates it to the tag. For example, PTx sends a specific beam and indicates the sending rule of a specific time-frequency resource. The tag receives 8 signals on the specific time-frequency resource and modulates them respectively according to 8 groups of pre-acquired information, and backscatters 8 signals to IRx. IRx determines the first information in the 8 groups of pre-acquired information based on the measurement of the reference indicator, such as SINR, and indicates it to the tag to complete the beam update process.

[0284] An embodiment of the present application provides an information indication method for collaborative modulation of the main link and the secondary link of a symbiotic communication system or a backscatter communication system, which can effectively solve the problem that the secondary link is limited in enhancing the communication performance of the main link when the reflection device does not have the amplification capability or the channel changes rapidly, and helps to improve the collaborative modulation efficiency of the primary and secondary systems.

[0285] Corresponding to Fig.12 The method embodiment shown, the embodiment of the present application also provides an information indication method, see Fig.13 As shown, the method may include the following steps:

[0286] S1310: The reflection device receives first information;

[0287] S1320: The reflection device performs signal encoding or modulation based on the first information;

[0288] The first information is determined based on the first signal, and the first signal includes the second signal sent by the reflection device or the third signal sent by the second device;

[0289] The first device is a receiving device of the primary link and the secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

[0290] By applying the method provided in the embodiment of the present application, after receiving the first information, the reflection device performs signal encoding or modulation based on the first information, where the first information is determined based on the first signal, and the first signal includes the second signal sent by the reflection device or the third signal sent by the second device, that is, the first information is determined based on the second signal sent by the reflection device or the third signal sent by the second device, and the reflection device performs signal encoding or modulation based on the first information, thereby realizing collaborative modulation of the primary and secondary systems, so that the reflection device can cooperate with the primary system for signal transmission.

[0291] In some embodiments of the present application, the first signal includes a second signal and a third signal, the second signal and the third signal are respectively multiple, different beams are sent in different directions, and each beam direction is configured with one or more third signals;

[0292] Before the reflection device receives the first information, the method further includes:

[0293] The reflection device modulates and generates a corresponding second signal based on each third signal;

[0294] The reflecting device sends a second signal to the first device.

[0295] In some embodiments of the present application, when the first signal includes the second signal, there are multiple second signals, different beams are sent in different directions, each beam direction is configured with one or more fourth signals, and different fourth signals are transmitted on different time-frequency resources;

[0296] Before the reflection device receives the first information, the method further includes:

[0297] The reflection device modulates and generates a corresponding second signal based on the second information and each fourth signal sent by the second device, and different second signals correspond to different second information or fourth signals;

[0298] The reflecting device sends a second signal to the first device.

[0299] In some embodiments of the present application, the reflection device receives the first information, including one of the following:

[0300] The reflection device receives first information corresponding to each beam;

[0301] The reflection device receives first information corresponding to the optimal beam.

[0302] In some embodiments of the present application, the method further comprises:

[0303] The reflection device receives time-frequency resource information corresponding to the specific beam configured by the second device;

[0304] The reflection device sends a plurality of fifth signals on the time-frequency resources corresponding to the specific beam;

[0305] Among them, each fifth signal is a signal modulated and reflected based on the third information and the sixth signal sent by the second device on the time-frequency resources corresponding to a specific beam. Different fifth signals correspond to different third information, and multiple fifth signals are used to update the first information on the time-frequency resources corresponding to a specific beam.

[0306] In some embodiments of the present application, when the first signal includes a second signal and a third signal, there are multiple second signals and multiple third signals respectively, each second signal is a signal modulated and reflected based on a third signal and fourth information, and different second signals correspond to different third signals or fourth information.

[0307] In some embodiments of the present application, the reflection device receives the first information, including one of the following:

[0308] The reflection device receives first information from the first device;

[0309] The reflection device receives the first information from the second device.

[0310] In some embodiments of the present application, the first information includes at least one of the following:

[0311] Modulation set information;

[0312] Index information of the modulation set;

[0313] Modulation phase information;

[0314] Modulation amplitude information;

[0315] Indicative form information;

[0316] The modulation set includes at least two items of a modulation mode, a modulation rate, a modulation phase and a modulation amplitude having a mapping relationship.

[0317] In some embodiments of the present application, the reflection device performs signal encoding or modulation based on the first information, including:

[0318] The reflection device performs signal encoding or modulation within the coherence time based on the first information.

[0319] In some embodiments of the present application, before the reflection device receives the first information, the method further includes:

[0320] Reflects the device's sending capability information;

[0321] The capability information includes at least one of the following:

[0322] Carrier generation capability information;

[0323] Frequency deviation capability information;

[0324] Oscillator capability information;

[0325] Amplify capability information;

[0326] Storage capacity information;

[0327] Information about supported modulation methods.

[0328] In some embodiments of the present application, the reflection device performs signal encoding or modulation based on the first information, including:

[0329] The reflection device performs signal encoding or modulation based on the first information to cooperate with the second device to perform signal transmission.

[0330] The information indication method provided in the embodiment of the present application can achieve Fig.12 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0331] The information indication method provided in the embodiment of the present application can be executed by an information indication device. In the embodiment of the present application, the information indication device provided in the embodiment of the present application is described by taking the information indication method executed by the information indication device as an example.

[0332] like Fig.14 As shown, the information indicating device 1400 may include the following modules:

[0333] A determination module 1410 is used to determine first information based on the first signal, where the first information is used to indicate a signal coding or modulation scheme of the reflection device;

[0334] An indication module 1420, configured to indicate first information;

[0335] The first signal includes the second signal sent by the reflection device or the third signal sent by the second device;

[0336] The first device is a receiving device of the primary link and the secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

[0337] By using the device provided in the embodiment of the present application, first information is determined based on a first signal, where the first information is used to indicate a signal coding or modulation scheme of a reflection device, and the first information is indicated. The first signal includes a second signal sent by the reflection device or a third signal sent by the second device, that is, based on the second signal sent by the reflection device or the third signal sent by the second device, the first information can be determined to indicate the signal coding or modulation of the reflection device, thereby realizing collaborative modulation of the primary and secondary systems, so that the reflection device can cooperate with the primary system for signal transmission.

[0338] In some embodiments of the present application, when the first signal includes the second signal and the third signal, the determination module 1410 is configured to:

[0339] estimating first channel state information of the secondary link based on the second signal;

[0340] estimating second channel state information of the primary link based on the third signal;

[0341] First information is determined according to the first channel state information and the second channel state information.

[0342] In some embodiments of the present application, the information indication device 1400 further includes a first receiving module, which is used to:

[0343] Before determining the first information based on the first signal, receiving the second signal and the third signal in one of the following ways:

[0344] Time division method, frequency division method, and code division method.

[0345] In some embodiments of the present application, there are multiple second signals and multiple third signals respectively, different beams are sent in different directions, one or more third signals are configured in each beam direction, and each second signal is a signal modulated and reflected based on the corresponding third signal;

[0346] The determination module 1410 is used to:

[0347] estimating first channel state information of a secondary link corresponding to each beam based on a second signal corresponding to each beam;

[0348] estimating second channel state information of a main link corresponding to each beam based on a third signal corresponding to each beam;

[0349] The first information corresponding to each beam is determined according to the first channel state information and the second channel state information corresponding to each beam.

[0350] In some embodiments of the present application, when the first signal includes the second signal, there are multiple second signals, each second signal is a signal modulated and reflected based on the second information and the fourth signal sent by the second device, different second signals correspond to different second information or fourth signals, different beams are sent in different directions, each beam direction is configured with one or more fourth signals, and different fourth signals are transmitted on different time-frequency resources;

[0351] The determination module 1410 is used to:

[0352] Determine, based on the multiple second signals corresponding to each beam, multiple measurement quantities corresponding to the reference indicator of each beam;

[0353] The first information corresponding to each beam is determined according to a plurality of measurement quantities corresponding to the reference indicator of each beam.

[0354] In some embodiments of the present application, the instruction module 1420 is configured to perform one of the following:

[0355] Sending first information corresponding to each beam to a reflection device or a second device;

[0356] The optimal beam is indicated to the second device, and the first information corresponding to the optimal beam is indicated to the reflection device.

[0357] In some embodiments of the present application, the information indication device 1400 further includes an updating module, which is used to:

[0358] Receiving time-frequency resource information corresponding to a specific beam configured by the second device;

[0359] receiving, on the time-frequency resources corresponding to the specific beam, a plurality of fifth signals sent by the reflection device, each of the fifth signals being a signal modulated and reflected based on the third information and a sixth signal sent by the second device on the time-frequency resources corresponding to the specific beam, and different fifth signals corresponding to different third information;

[0360] Based on multiple fifth signals, first information on the time-frequency resources corresponding to the specific beam is updated.

[0361] In some embodiments of the present application, when the first signal includes the second signal and the third signal, there are multiple second signals and multiple third signals respectively, each second signal is a signal modulated and reflected based on a third signal and fourth information, and different second signals correspond to different third signals or fourth information;

[0362] The determination module 1410 is used to:

[0363] Determining a plurality of measurement quantities corresponding to the reference indicator based on the plurality of second signals and the plurality of third signals;

[0364] The first information is determined according to a plurality of measurement quantities corresponding to the reference indicator.

[0365] In some embodiments of the present application, the determination module 1410 is used to:

[0366] The first information is determined based on an optimal measurement quantity among a plurality of measurement quantities corresponding to the reference indicator.

[0367] In some embodiments of the present application, the reference indicator includes at least one of the following:

[0368] Signal receiving power;

[0369] reliability;

[0370] Signal-to-noise ratio;

[0371] Signal-to-interference-noise ratio.

[0372] In some embodiments of the present application, the instruction module 1420 is configured to perform one of the following:

[0373] sending first information to the reflection device;

[0374] The first information is sent to the reflection device through the second device.

[0375] In some embodiments of the present application, the instruction module 1420 is configured to perform one of the following:

[0376] explicitly indicating the first information;

[0377] The first information is implicitly indicated.

[0378] In some embodiments of the present application, the first information includes at least one of the following:

[0379] Modulation set information; modulation set index information; modulation phase information; modulation amplitude information; indication form information; wherein the modulation set includes at least two of the modulation mode, modulation rate, modulation phase and modulation amplitude having a mapping relationship.

[0380] In some embodiments of the present application, the first information is used to indicate a signal coding or modulation scheme of the reflecting device within the coherence time.

[0381] In some embodiments of the present application, the information indication device 1400 further includes a second receiving module, which is used to:

[0382] Before determining the first information based on the first signal, receiving capability information of the reflection device;

[0383] The capability information includes at least one of the following:

[0384] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; storage capability information; supported modulation method information.

[0385] In some embodiments of the present application, the first information is used to indicate a signal coding or modulation scheme of the reflection device to cooperate with the second device for signal transmission.

[0386] The information indication device 1400 provided in the embodiment of the present application can realize Fig.12 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0387] like Fig.15 As shown, the information indication device 1500 may include the following modules:

[0388] The third receiving module 1510 is used to receive first information;

[0389] The processing module 1520 is used to perform signal encoding or modulation based on the first information;

[0390] The first information is determined based on the first signal, and the first signal includes the second signal sent by the reflection device or the third signal sent by the second device;

[0391] The first device is a receiving device of the primary link and the secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

[0392] By using the device provided in the embodiment of the present application, after receiving the first information, signal encoding or modulation is performed based on the first information, where the first information is determined based on the first signal, and the first signal includes the second signal sent by the reflection device or the third signal sent by the second device, that is, the first information is determined based on the second signal sent by the reflection device or the third signal sent by the second device, and signal encoding or modulation is performed based on the first information, thereby realizing collaborative modulation of the primary and secondary systems, so that the primary system can be coordinated for signal transmission.

[0393] In some embodiments of the present application, the first signal includes a second signal and a third signal, the second signal and the third signal are respectively multiple, different beams are sent in different directions, and each beam direction is configured with one or more third signals;

[0394] The information indicating device 1500 further includes a first sending module, which is used to:

[0395] Before receiving the first information, modulating and generating a corresponding second signal based on each third signal;

[0396] A second signal is sent to the first device.

[0397] In some embodiments of the present application, when the first signal includes the second signal, there are multiple second signals, different beams are sent in different directions, each beam direction is configured with one or more fourth signals, and different fourth signals are transmitted on different time-frequency resources;

[0398] The information indicating device 1500 further includes a second sending module, which is used to:

[0399] Before receiving the first information, modulate and generate a corresponding second signal based on the second information and each fourth signal sent by the second device, where different second signals correspond to different second information or fourth signals;

[0400] A second signal is sent to the first device.

[0401] In some embodiments of the present application, the third receiving module is configured to perform one of the following:

[0402] receiving first information corresponding to each beam;

[0403] Receive first information corresponding to the optimal beam.

[0404] In some embodiments of the present application, the information indication device 1500 further includes a third sending module, which is used to:

[0405] Receiving time-frequency resource information corresponding to a specific beam configured by the second device;

[0406] Sending a plurality of fifth signals on the time-frequency resources corresponding to the specific beam;

[0407] Among them, each fifth signal is a signal modulated and reflected based on the third information and the sixth signal sent by the second device on the time-frequency resources corresponding to a specific beam. Different fifth signals correspond to different third information, and multiple fifth signals are used to update the first information on the time-frequency resources corresponding to a specific beam.

[0408] In some embodiments of the present application, when the first signal includes a second signal and a third signal, there are multiple second signals and multiple third signals respectively, each second signal is a signal modulated and reflected based on a third signal and fourth information, and different second signals correspond to different third signals or fourth information.

[0409] In some embodiments of the present application, the third receiving module 1510 is configured to perform one of the following:

[0410] receiving first information from a first device;

[0411] First information is received from a second device.

[0412] In some embodiments of the present application, the first information includes at least one of the following:

[0413] Modulation set information; modulation set index information; modulation phase information; modulation amplitude information; indication form information; wherein the modulation set includes at least two of the modulation mode, modulation rate, modulation phase and modulation amplitude having a mapping relationship.

[0414] In some embodiments of the present application, the processing module 1520 is used to:

[0415] Based on the first information, signal encoding or modulation is performed within the coherence time.

[0416] In some embodiments of the present application, the information indication device 1500 further includes a fourth sending module, which is used to:

[0417] before receiving the first information, sending capability information;

[0418] The capability information includes at least one of the following:

[0419] Carrier generation capability information; frequency deviation capability information; oscillator capability information; amplification capability information; storage capability information; supported modulation method information.

[0420] In some embodiments of the present application, the processing module 1520 is used to:

[0421] Based on the first information, signal encoding or modulation is performed to cooperate with the second device to perform signal transmission.

[0422] The information indication device 1500 provided in the embodiment of the present application can realize Fig.13 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0423] like Fig.16 As shown, the embodiment of the present application further provides a communication device 1600, including a processor 1601 and a memory 1602, the memory 1602 stores a program or instruction that can be run on the processor 1601, for example, when the communication device 1600 is a first device, the program or instruction is executed by the processor 1601 to implement the above Fig.12 When the communication device 1600 is a reflection device, the program or instruction is executed by the processor 1601 to implement the above Fig.13 The various steps of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0424] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Fig.12The steps in the method embodiment shown. This terminal embodiment corresponds to the first device side method embodiment described above, and each implementation process and implementation method of the above method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig.17 A schematic diagram of the structure of a terminal for implementing an embodiment of the present application.

[0425] The terminal 1700 includes but is not limited to: a radio frequency unit 1701, a network module 1702, an audio output unit 1703, an input unit 1704, a sensor 1705, a display unit 1706, a user input unit 1707, an interface unit 1708, a memory 1709 and at least some of the components of the processor 1710.

[0426] Those skilled in the art will appreciate that the terminal 1700 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1710 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.17 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0427] It should be understood that in the embodiment of the present application, the input unit 1704 may include a graphics processing unit (GPU) 17041 and a microphone 17042, and the graphics processor 17041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1706 may include a display panel 17061, and the display panel 17061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1707 includes a touch panel 17071 and at least one of other input devices 17072. The touch panel 17071 is also called a touch screen. The touch panel 17071 may include two parts: a touch detection device and a touch controller. Other input devices 17072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0428] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1701 can transmit the data to the processor 1710 for processing; in addition, the RF unit 1701 can send uplink data to the network side device. Generally, the RF unit 1701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0429] The memory 1709 can be used to store software programs or instructions and various data. The memory 1709 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1709 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0430] The processor 1710 may include one or more processing units; optionally, the processor 1710 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1710.

[0431] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0432] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Fig.12The steps of the method embodiment shown. This network side device embodiment corresponds to the first device method embodiment described above, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0433] Specifically, the embodiment of the present application also provides a network side device. Fig.18 As shown, the network side device 1800 includes: an antenna 1801, a radio frequency device 1802, a baseband device 1803, a processor 1804 and a memory 1805. The antenna 1801 is connected to the radio frequency device 1802. In the uplink direction, the radio frequency device 1802 receives information through the antenna 1801 and sends the received information to the baseband device 1803 for processing. In the downlink direction, the baseband device 1803 processes the information to be sent and sends it to the radio frequency device 1802. The radio frequency device 1802 processes the received information and sends it out through the antenna 1801.

[0434] The method executed by the first device in the above embodiment may be implemented in the baseband device 1803, which includes a baseband processor.

[0435] The baseband device 1803 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.18 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1805 through a bus interface to call the program in the memory 1805 to execute the first device operation shown in the above method embodiment.

[0436] The network side device may further include a network interface 1806, which is, for example, a Common Public Radio Interface (CPRI).

[0437] Specifically, the network side device 1800 of the embodiment of the present application further includes: instructions or programs stored in the memory 1805 and executable on the processor 1804, and the processor 1804 calls the instructions or programs in the memory 1805 to execute Fig.14 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0438] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored, and when the program or instruction is executed by a processor, the above Fig.12 or Fig.13 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0439] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0440] The present application embodiment further provides a computer program / program product, wherein the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the above Fig.12 or Fig.13 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0441] The embodiment of the present application also provides a wireless communication system, including: a first device having a communication connection, a second device and a reflection device, wherein the first device can be used to perform the above Fig.12 The steps of the method embodiment shown in the figure, the reflection device can be used to perform the above Fig.13 Steps of the method embodiment are shown.

[0442] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0443] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0444] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. An information indication method, characterized in that: include: The first device determines first information based on the first signal, wherein the first information is used to indicate a signal coding or modulation scheme of the reflection device; The first device indicates the first information; Wherein, the first signal includes the second signal sent by the reflection device or the third signal sent by the second device; The first device is a receiving device of a primary link and a secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

2. The method according to claim 1, characterized in that In a case where the first signal includes the second signal and the third signal, the first device determines first information based on the first signal, including: The first device estimates first channel state information of the secondary link based on the second signal; The first device estimates second channel state information of the primary link based on the third signal; The first device determines first information according to the first channel state information and the second channel state information.

3. The method according to claim 2, characterized in that Before the first device determines the first information based on the first signal, the method further includes: The first device receives the second signal and the third signal in one of the following ways: Time division method, frequency division method, and code division method.

4. The method according to claim 2, characterized in that: There are multiple second signals and multiple third signals respectively, different beams are sent in different directions, one or more third signals are configured in each beam direction, and each second signal is a signal modulated and reflected based on the corresponding third signal; The first device estimating first channel state information of the secondary link based on the second signal includes: The first device estimates first channel state information of the secondary link corresponding to each beam based on the second signal corresponding to each beam; The first device estimates second channel state information of the primary link based on the third signal, including: The first device estimates second channel state information of the main link corresponding to each beam based on the third signal corresponding to each beam; The first device determines first information according to the first channel state information and the second channel state information, including: The first device determines the first information corresponding to each beam according to the first channel state information and the second channel state information corresponding to each beam.

5. The method according to claim 1, characterized in that In the case where the first signal includes the second signal, there are multiple second signals, each second signal is a signal modulated and reflected based on the second information and the fourth signal sent by the second device, different second signals correspond to different second information or fourth signals, different beams are sent in different directions, one or more fourth signals are configured in each beam direction, and different fourth signals are transmitted on different time-frequency resources; The first device determines first information based on the first signal, including: The first device determines, based on the multiple second signals corresponding to each beam, multiple measurement quantities corresponding to the reference indicator of each beam; The first device determines first information corresponding to each beam according to multiple measurement quantities corresponding to the reference indicator of each beam.

6. The method according to claim 4 or 5, characterized in that: The first device indicates the first information, including one of the following: The first device sends first information corresponding to each beam to the reflection device or the second device; The first device indicates an optimal beam to the second device, and indicates first information corresponding to the optimal beam to the reflection device.

7. The method according to any one of claims 4 to 6, characterized in that The method further comprises: The first device receives time-frequency resource information corresponding to a specific beam configured by the second device; The first device receives multiple fifth signals sent by the reflection device on the time-frequency resources corresponding to the specific beam, each fifth signal is a signal modulated and reflected based on the third information and the sixth signal sent by the second device on the time-frequency resources corresponding to the specific beam, and different fifth signals correspond to different third information; The first device updates first information on the time-frequency resources corresponding to the specific beam based on the multiple fifth signals.

8. The method according to claim 1, characterized in that: In the case where the first signal includes the second signal and the third signal, there are multiple second signals and multiple third signals respectively, each second signal is a signal modulated and reflected based on a third signal and fourth information, and different second signals correspond to different third signals or fourth information; The first device determines first information based on the first signal, including: The first device determines a plurality of measurement quantities corresponding to the reference indicator based on the plurality of second signals and the plurality of third signals; The first device determines first information according to a plurality of measurement quantities corresponding to the reference indicator.

9. The method according to claim 8, characterized in that The first device determines first information according to a plurality of measurement quantities corresponding to the reference indicator, including: The first device determines the first information based on an optimal measurement quantity among a plurality of measurement quantities corresponding to the reference indicator.

10. The method according to any one of claims 5, 8 and 9, characterized in that: The reference indicators include at least one of the following: Signal receiving power; reliability; Signal-to-noise ratio; Signal-to-interference-noise ratio.

11. The method according to any one of claims 1 to 5 and 8 to 10, characterized in that: The first device indicates the first information, including one of the following: The first device sends the first information to the reflection device; The first device sends the first information to the reflection device through the second device.

12. The method according to any one of claims 1 to 11, characterized in that The first device indicates the first information, including one of the following: The first device explicitly indicates the first information; The first device implicitly indicates the first information.

13. The method according to any one of claims 1 to 12, characterized in that The first information includes at least one of the following: Modulation set information; Index information of the modulation set; Modulation phase information; Modulation amplitude information; Indicative form information; The modulation set includes at least two items of a modulation mode, a modulation rate, a modulation phase and a modulation amplitude having a mapping relationship.

14. The method according to any one of claims 1 to 6 and 8 to 13, characterized in that The first information is used to indicate a signal coding or modulation scheme of the reflection device within the coherence time.

15. The method according to any one of claims 1 to 14, characterized in that Before the first device determines the first information based on the first signal, the method further includes: The first device receives capability information of the reflective device; The capability information includes at least one of the following: Carrier generation capability information; Frequency deviation capability information; Oscillator capability information; Amplify capability information; Storage capacity information; Information about supported modulation methods.

16. The method according to any one of claims 1 to 15, characterized in that The first information is used to indicate a signal coding or modulation scheme of the reflection device to cooperate with the second device for signal transmission.

17. An information indication method, characterized in that: include: The reflection device receives the first information; The reflection device performs signal encoding or modulation based on the first information; The first information is determined based on a first signal, and the first signal includes a second signal sent by the reflection device or a third signal sent by the second device; The first device is a receiving device of a primary link and a secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

18. The method according to claim 17, characterized in that The first signal includes the second signal and the third signal, the second signal and the third signal are respectively in plurality, different beams are sent in different directions, and one or more third signals are configured in each beam direction; Before the reflection device receives the first information, the method further includes: The reflection device modulates and generates a corresponding second signal based on each third signal; The reflecting device sends the second signal to the first device.

19. The method according to claim 17, characterized in that In the case where the first signal includes the second signal, there are multiple second signals, different beams are sent in different directions, one or more fourth signals are configured in each beam direction, and different fourth signals are transmitted on different time-frequency resources; Before the reflection device receives the first information, the method further includes: The reflection device modulates and generates a corresponding second signal based on the second information and each fourth signal sent by the second device, and different second signals correspond to different second information or fourth signals; The reflecting device sends the second signal to the first device.

20. The method according to any one of claims 18 or 19, characterized in that The reflection device receives first information, including one of the following: The reflecting device receives first information corresponding to each beam; The reflection device receives first information corresponding to the optimal beam.

21. The method according to any one of claims 18 to 20, characterized in that The method further comprises: The reflection device receives time-frequency resource information corresponding to the specific beam configured by the second device; The reflection device sends a plurality of fifth signals on the time-frequency resources corresponding to the specific beam; Among them, each fifth signal is a signal modulated and reflected based on the third information and the sixth signal sent by the second device on the time-frequency resources corresponding to the specific beam, different fifth signals correspond to different third information, and the multiple fifth signals are used to update the first information on the time-frequency resources corresponding to the specific beam.

22. The method according to claim 17, characterized in that In the case where the first signal includes the second signal and the third signal, there are multiple second signals and multiple third signals respectively, each second signal is a signal modulated and reflected based on a third signal and fourth information, and different second signals correspond to different third signals or fourth information.

23. The method according to any one of claims 17 to 19 and 22, characterized in that: The reflection device receives first information, including one of the following: The reflection device receives first information from the first device; The reflection device receives first information from the second device.

24. The method according to any one of claims 17 to 23, characterized in that The first information includes at least one of the following: Modulation set information; Index information of the modulation set; Modulation phase information; Modulation amplitude information; Indicative form information; The modulation set includes at least two items of a modulation mode, a modulation rate, a modulation phase and a modulation amplitude having a mapping relationship.

25. The method according to any one of claims 17 to 20, 22 to 24, characterized in that The reflection device performs signal encoding or modulation based on the first information, including: The reflection device performs signal encoding or modulation within the coherence time based on the first information.

26. The method according to any one of claims 17 to 25, characterized in that Before the reflection device receives the first information, the method further includes: The reflective device sends capability information; The capability information includes at least one of the following: Carrier generation capability information; Frequency deviation capability information; Oscillator capability information; Amplify capability information; Storage capacity information; Information about supported modulation methods.

27. The method according to any one of claims 17 to 26, characterized in that The reflection device performs signal encoding or modulation based on the first information, including: The reflection device performs signal encoding or modulation based on the first information to cooperate with the second device to perform signal transmission.

28. An information indicating device, characterized in that: include: A determination module, configured to determine first information based on the first signal, wherein the first information is used to indicate a signal coding or modulation scheme of the reflection device; an indication module, used for indicating the first information; Wherein, the first signal includes the second signal sent by the reflection device or the third signal sent by the second device; The first device is a receiving device of a primary link and a secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

29. An information indicating device, characterized in that: include: A third receiving module, used for receiving first information; A processing module, configured to perform signal encoding or modulation based on the first information; The first information is determined based on a first signal, and the first signal includes a second signal sent by a reflection device or a third signal sent by the second device; The first device is a receiving device of a primary link and a secondary link, the reflection device is a sending device of the secondary link, and the second device is a sending device of the primary link.

30. A communication device, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the information indication method as described in any one of claims 1 to 27 are implemented.

31. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the information indication method as described in any one of claims 1 to 27 are implemented.

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