Communication method, communication device, communication system, and storage medium

Abstract

The embodiment of the application discloses a communication method, a communication device, a communication system and a storage medium, which are applied to the technical field of communication and used for realizing low-cost improvement of coverage range of a radio frequency unit. In the embodiment of the application, the radio frequency unit sends a carrier signal to a passive tag through a radio frequency device, so the radio frequency device is a relay device between the radio frequency unit and the passive tag, the distance between the radio frequency device and the passive tag is smaller than the distance between the radio frequency unit and the passive tag, near-end deployment is realized, and the coverage range is improved. Since the radio frequency device is deployed in the near end, the situation that there is an obstacle between the radio frequency device and the passive tag can be reduced, so the possibility that the distance between the radio frequency device and the passive tag is LOS is higher. Since the radio frequency device only sends a signal to the passive tag and does not receive a reflected signal from the passive tag, the function is less, the cost is lower, and then the low-cost improvement of the coverage range is realized.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method, communication device, communication system and storage medium. Background Technology

[0002] Passive Internet of Things (P-IoT) reads tag information based on the backscatter communication principle. The tags are passive, therefore they require power from the base station to maintain both data reception and transmission.

[0003] For a tag to be able to charge, the received power needs to reach the tag's power supply sensitivity. Currently, the industry standard for passive tag wireless power supply sensitivity is approximately -24dBm. Assuming the maximum equivalent isotropic radiated power (EIRP) of an indoor base station is 35dBm, the path loss between the pico remote radio unit (pRRU) and the tag must be less than 59dB to achieve the tag's charging sensitivity. Assuming an indoor network base station inter-site distance (ISD) of 24 meters and a mounting height of 9 meters, with the tag located in the middle of the pRRU, the path loss calculated based on line-of-sight (LOS) is approximately 56dB. In this scenario, the tag's power supply sensitivity has only a 3dB margin.

[0004] Considering the non-line-of-sight (NLOS) path scenarios and occlusion issues in practical applications, the use of passive IoT is limited in this scenario. Summary of the Invention

[0005] This application provides a communication method, communication device, communication system, and storage medium for achieving low-cost improvement of the coverage of radio frequency units.

[0006] The first aspect of this application provides a communication method. Optionally, the execution subject of this method can be a radio frequency (RF) device, a component or device applied to the RF device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the RF device. Taking the RF device as an example, the RF device receives first control information from the RF unit. The RF device can generate a first signal according to the first control information and send the first signal to a passive tag. The first signal is used to provide a carrier wave for the passive tag, and the carrier wave is used to carry the information of the passive tag. At the same time, the carrier signal can also activate the passive tag, thereby enabling the passive tag to feed back the stored information to the RF unit through a modulated signal.

[0007] Based on the first aspect of this application, since the radio frequency unit (e.g., pRRU) transmits carrier signals to the passive tag through the radio frequency device, the radio frequency device acts as a relay device between the radio frequency unit and the passive tag. Therefore, the distance between the radio frequency device and the passive tag is less than the distance between the radio frequency unit and the passive tag, thereby achieving near-end deployment and improving coverage. Furthermore, because the radio frequency device is deployed near-end, the possibility of obstructions between the radio frequency device and the passive tag is reduced, increasing the likelihood of a LOS path between them. Since the radio frequency device only transmits signals to the passive tag and does not receive reflected signals from the passive tag, it has fewer functions and therefore lower costs, thus achieving improved coverage at a lower cost.

[0008] Based on the first aspect of this application, in some possible implementations, the first signal is a single-tone signal.

[0009] In this embodiment, single-tone signals have higher power supply efficiency, thus improving the power supply efficiency of passive tags. Furthermore, in a single-carrier system, using single-tone signals reduces deployment complexity.

[0010] Based on the first aspect of this application, in some possible implementations, the first control information is a 1-bit indication information. For example, if the first control information is "1", the radio frequency device transmits a first signal; if the first control information is "0", the radio frequency device does not transmit the first signal. It should be understood that this application does not limit the specific indication content of the 1-bit indication information; it is also possible that if the first control information is "0", the radio frequency device transmits the first signal; if the first control information is "1", the radio frequency device does not transmit the first signal.

[0011] In this embodiment, the radio frequency device decides to send a first signal based on the first control information from the radio frequency unit, which makes the radio frequency device simple in structure and lower in cost, thereby achieving a low-cost increase in coverage.

[0012] Based on the first aspect of this application, in some possible implementations, the information of the passive tag includes one or more of the following: random access information, passive tag identification information, response information, and data information.

[0013] In this embodiment of the application, by specifying the information of the passive tag, the carrier provided by the first signal can carry the information of the passive tag for random access or that needs to be transmitted to the first radio frequency unit, thereby completing the random access or information transmission of the passive tag and improving the coverage of the first radio frequency unit.

[0014] Based on the first aspect of this application, in some possible embodiments, the radio frequency device will also receive downlink data signals, which are used to carry data packets. The radio frequency device receives second control information, which is used by the radio frequency unit to instruct the radio frequency device to send downlink data signals, and the radio frequency device sends downlink data signals according to the second control information.

[0015] In this embodiment of the application, by instructing the radio frequency device to send downlink data signals through the second control information, the radio frequency unit can send downlink data to the passive tag through the radio frequency device, thereby improving the coverage of the first radio frequency unit.

[0016] Based on the first aspect of this application, in some possible implementations, the second control information is a 1-bit indication information. For example, if the second control information is "1", the radio frequency device transmits a downlink data signal; if the second control information is "0", the radio frequency device does not transmit a downlink data signal. It should be understood that this application does not limit the specific indication content of the 1-bit indication information; it is also possible that if the second control information is "0", the radio frequency device transmits a downlink data signal; if the second control information is "1", the radio frequency device does not transmit a downlink data signal.

[0017] In this embodiment, the radio frequency device determines to transmit downlink data signals based on the second control information from the radio frequency unit, which makes the radio frequency device structure simple and the cost lower, thereby achieving low-cost improvement of coverage.

[0018] Based on the first aspect of this application, in some possible implementations, the data message is a data message between the first radio frequency unit and the passive tag.

[0019] In this embodiment, since the data packet is a data packet between the first radio frequency unit and the passive tag, the radio frequency unit sends downlink data to the passive tag through the radio frequency device, thereby improving the coverage of the first radio frequency unit. Simultaneously, since the radio frequency device does not need to process the data packet, its functionality is reduced, thus lowering the deployment cost of the radio frequency device.

[0020] A second aspect of this application provides a communication method applied to a passive tag. The method includes: the passive tag receiving a first signal from a radio frequency device, the first signal providing a carrier wave for the passive tag, and the carrier wave carrying information from the passive tag. The passive tag modulates the stored information onto the first signal to generate a second signal, which is the modulated signal of the first signal. Simultaneously, the first signal also powers the passive tag, activating it and enabling the passive tag to feed back the stored information to the radio frequency unit via the modulated signal.

[0021] Based on the second aspect of this application, in some possible implementations, the first signal is a single-tone signal.

[0022] Based on the second aspect of this application, in some possible implementations, the information of the passive tag includes one or more of the following: random access information, passive tag identification information, response information, and data information.

[0023] Based on the second aspect of this application, in some possible implementations, the passive tag receives a downlink data signal, the downlink data signal is used to carry a data message, and the data message is a data message between the first radio frequency unit and the passive tag.

[0024] A third aspect of this application provides a communication method. Optionally, the execution subject of this method can be a radio frequency (RF) unit, a component or device applied to the RF unit (e.g., a processor, chip, or chip system), or a logic module or software (e.g., a radio unit (RU)) capable of implementing all or part of the functions of the RF unit. Taking a first RF unit as an example, the first RF unit sends first control information to the RF device. The first control information instructs the RF device to send a first signal. The first signal provides a carrier wave for a passive tag, and the carrier wave carries the information of the passive tag. Simultaneously, the first signal also powers the passive tag, thereby activating it and enabling the passive tag to feed back its stored information to the RF unit via a modulated signal. The first RF unit receives a second signal, which is a modulated signal of the first signal.

[0025] Based on a third aspect of this application, in some possible implementations, the first signal is a single-tone signal.

[0026] Based on the third aspect of this application, in some possible implementations, the first control information is a 1-bit indication information. For example, if the first control information is "1", the radio frequency device transmits a first signal; if the first control information is "0", the radio frequency device does not transmit the first signal. It should be understood that this application does not limit the specific indication content of the 1-bit indication information; it is also possible that if the first control information is "0", the radio frequency device transmits the first signal; if the first control information is "1", the radio frequency device does not transmit the first signal.

[0027] Based on the third aspect of this application, in some possible implementations, the information of the passive tag includes one or more of the following: random access information, passive tag identification information, response information, and data information.

[0028] Based on a third aspect of this application, in some possible implementations, a first radio frequency unit transmits a downlink data signal to a radio frequency device, the downlink data signal being used to carry a data packet. The first radio frequency unit also transmits second control information to the radio frequency device, the second control information being used to instruct the radio frequency device to transmit the downlink data signal.

[0029] Based on the third aspect of this application, in some possible implementations, the second control information is a 1-bit indication information. For example, if the second control information is "1", the radio frequency device transmits a downlink data signal; if the second control information is "0", the radio frequency device does not transmit a downlink data signal. It should be understood that this application does not limit the specific indication content of the 1-bit indication information; it is also possible that if the second control information is "0", the radio frequency device transmits a downlink data signal; if the second control information is "1", the radio frequency device does not transmit a downlink data signal.

[0030] Based on the third aspect of this application, in some possible implementations, the data message is a data message between the first radio frequency unit and the passive tag.

[0031] A fourth aspect of this application provides a communication device, comprising:

[0032] The interface module is used to receive the first control information;

[0033] The processing module is used to send a first signal according to the first control information. The first signal is used to provide a carrier wave for the passive tag, and the carrier wave is used to carry the information of the passive tag.

[0034] Based on the fourth aspect of this application, in some possible implementations, the first signal is a single-tone signal.

[0035] Based on the fourth aspect of this application, in some possible implementations, the first control information is a 1-bit indication information, and the processing module is configured to send a first signal according to the first control information, including:

[0036] If the first control information is "1", then the processing module is specifically used to send the first signal; or,

[0037] If the first control information is "0", then the processing module is specifically used to send the first signal.

[0038] It should be understood that this application does not limit the specific indication content of the 1-bit indication information. It can also be that if the first control information is "0", then the first signal is sent; if the first control information is "1", then the first signal is not sent. Based on the fourth aspect of this application, in some possible implementations, the information of the passive tag includes one or more of the following: random access information, passive tag identification information, response information, and data information.

[0039] Based on the fourth aspect of this application, in some possible implementations, the interface module is further configured to receive downlink data signals, which are used to carry data packets;

[0040] The interface module is also used to receive second control information;

[0041] The processing module is also used to send downlink data signals based on the second control information.

[0042] Based on the fourth aspect of this application, in some possible implementations, the second control information is a 1-bit indication information, and the processing module is further configured to send a downlink data signal according to the second control information, including:

[0043] If the second control information is 1, then the processing module is specifically used to send downlink data signals; or,

[0044] If the second control information is 0, then the processing module is specifically used to send downlink data signals.

[0045] It should be understood that this application does not limit the specific indication content of the 1-bit indication information. It can also be that if the second control information is "0", then a downlink data signal is sent; if the second control information is "1", then no downlink data signal is sent.

[0046] Based on the fourth aspect of this application, in some possible implementations, the data message is a data message between the first radio frequency unit and the passive tag.

[0047] The fifth aspect of this application provides a communication device, comprising:

[0048] The processing module is used to generate the first control information;

[0049] The interface module is used to send first control information, which instructs the radio frequency device to send a first signal. The first signal is used to provide a carrier for the passive tag, and the carrier is used to carry the information of the passive tag.

[0050] The interface module is also used to receive a second signal, which includes the modulated signal of the first signal.

[0051] Based on the fifth aspect of this application, in some possible implementations, the first signal is a single-tone signal.

[0052] Based on the fifth aspect of this application, in some possible implementations, the first control information is a 1-bit indication information, for example:

[0053] If the first control information is "1", then the first control information is used to instruct the radio frequency device to send a first signal; or,

[0054] If the first control information is "0", then the first control information is used to instruct the radio frequency device to send the first signal.

[0055] It should be understood that this application does not limit the specific indication content of the 1-bit indication information. It can also be that if the first control information is "0", then the first control information is used to instruct the radio frequency device to send the first signal; if the first control information is "0", then the first control information is used to instruct the radio frequency device not to send the first signal.

[0056] Based on the fifth aspect of this application, in some possible implementations, the information of the passive tag includes one or more of the following: random access information, passive tag identification information, response information, and data information.

[0057] Based on the fifth aspect of this application, in some possible implementations, the interface module is further configured to send downlink data signals, which are used to carry data packets;

[0058] The interface module is also used to send second control information, which instructs the radio frequency device to send downlink data signals.

[0059] Based on the fifth aspect of this application, in some possible implementations, the second control information is a 1-bit indication information, for example:

[0060] If the second control information is "1", then the second control information is used to instruct the radio frequency device to send downlink data signals; or,

[0061] If the second control information is "0", then the second control information is used to instruct the radio frequency device to send downlink data signals.

[0062] It should be understood that this application does not limit the specific content of the 1-bit indication information. It can also be that if the first control information is "0", then the second control information is used to instruct the radio frequency device to send downlink data signals; if the first control information is "1", then the second control information is used to instruct the radio frequency device not to send downlink data signals.

[0063] Based on the fifth aspect of this application, in some possible implementations, the data message is a data message between the first radio frequency unit and the passive tag.

[0064] The sixth aspect of this application provides a chip or chip system including at least one processor and a communication interface, the communication interface and at least one processor being interconnected via a line, the at least one processor being used to run computer programs or instructions to perform the communication methods described in any of the possible implementations of the first, second or third aspects above.

[0065] The communication interface in the chip can be an input / output interface, pins, or circuits.

[0066] In one possible implementation, the chip or chip system described above in this application further includes at least one memory storing instructions. The memory can be an internal storage unit of the chip, such as a register or cache, or it can be a storage unit of the chip itself, such as a read-only memory or random access memory.

[0067] The seventh aspect of this application provides a communication system, including a communication device for performing the first aspect and any possible implementation thereof, a communication device for performing the second aspect and any possible implementation thereof, and a communication device for performing the second aspect and any possible implementation thereof.

[0068] An eighth aspect of this application provides a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method described in the first aspect above, or cause the computer to perform the method described in the second aspect above, or cause the computer to perform the method described in the third aspect above.

[0069] The ninth aspect of this application provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the method described in the first aspect above, or cause the computer to perform the method described in the second aspect above, or cause the computer to perform the method described in the third aspect above. Attached Figure Description

[0070] Figure 1 This is a schematic diagram of one embodiment of the communication system in this application;

[0071] Figure 2 This is one possible application scenario for the communication method in the embodiments of this application;

[0072] Figure 3 This is a schematic diagram of one embodiment of the communication architecture in this application;

[0073] Figure 4 This is a schematic diagram of another embodiment of the communication architecture in this application;

[0074] Figure 5 This is a schematic diagram of one embodiment of the communication method in this application;

[0075] Figure 6 This is a schematic diagram of another embodiment of the communication method in this application;

[0076] Figure 7 This is a schematic diagram of another embodiment of the communication method in this application;

[0077] Figure 8This is a schematic diagram of another embodiment of the communication method in this application;

[0078] Figure 9 This is a schematic diagram of one embodiment of the communication device in this application;

[0079] Figure 10 This is a schematic diagram of another embodiment of the communication device in this application;

[0080] Figure 11 This is a schematic diagram of another embodiment of the communication device in this application;

[0081] Figure 12 This is a schematic diagram of another embodiment of the communication device in this application. Detailed Implementation

[0082] This application provides a communication method, communication device, communication system, and storage medium for achieving low-cost improvement of the coverage of radio frequency units.

[0083] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0084] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0085] References to "one embodiment" or "some embodiments" as described in this application mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0086] In the description of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, and c can be single or multiple.

[0087] First, some technical terms involved in the embodiments of this application will be introduced.

[0088] 1) Passive Internet of Things (P-IoT):

[0089] P-IoT systems refer to Internet of Things (IoT) systems that include passive network nodes. These passive network nodes are those that do not have their own power supply and can perform data sensing, data transmission, and distributed computing based on environmental energy sources such as solar, radio frequency, wind, hydro, or tidal power. P-IoT systems consist of readers and passive network nodes, and their main functions include inventory management, location tracking, and sensor reporting. Typical application scenarios include logistics, warehousing, industrial manufacturing, identity verification, and environmental monitoring. P-IoT systems can include, but are not limited to, systems using radio frequency identification (RFID) technology, passive IoT technology, and semi-active IoT technology.

[0090] 2) Reader / writer:

[0091] Generally considered to be an RFID reader / writer terminal device, it can read radio frequency tags and erase / write data, hence the name "reader / writer." The reader / writer's antenna is the device that transmits and receives radio frequency carrier signals. Its main responsibility is to convert the current signal in the reader / writer into a radio frequency carrier signal and send it to the electronic tag, or to receive the radio frequency carrier signal sent by the tag and convert it back into a current signal. The reader / writer's antenna can be external or internal. The antenna design is crucial to the reader / writer's performance. For passive tags, all of their operating power is provided by the reader / writer's antenna.

[0092] 3) Inventory:

[0093] Inventory processing involves cyclically scanning all tags that meet the selection criteria, and each tag will return its Electronic Product Code (EPC). This operation allows you to first read the EPC numbers of all matching tags and then assign them to their respective application blocks. Inventory processing involves many parameters and is a cyclical scanning process. Several different inventory commands are combined and applied within a single inventory scan; therefore, one inventory cycle is also called an inventory period.

[0094] 4) ALOHA Algorithm:

[0095] The ALOHA algorithm is a random access algorithm widely used in RFID systems. This algorithm employs a "base station speaks first" approach. In one round of data storage, the base station sends out 2n time slots using the Q value carried in the query command Query. The tags then generate their own data from 0 to 2n based on the sent Q value. 1 A random integer is used to determine the access status of a tag. When the tag's random number is 0, the tag starts sending RN information to the base station for random access in that time slot. If only one tag sends an RN in that time slot, the random access is successful, and the base station sends an ACK. After receiving the ACK, the tag sends EPC information to the base station. This time slot is called the success time slot. After the base station successfully demodulates the EPC, it starts sending QueryRep to indicate the start of the next time slot. After receiving the QueryRep information, the tag decrements the random number by 1. When the random number is 0, the tag sends random access information. If multiple tags respond with RNs at this time, a collision occurs, and this time slot is called the collision time slot. When the base station detects a collision, it sends QueryRep to start the next time slot. After receiving the QueryRep information, the tag decrements the random number by 1. When the random number is 0, the tag sends random access information. If no tag responds with an RN at this time, it is an empty time slot.

[0096] 5) Carrier wave (CW):

[0097] Carrier signals are typically high-frequency sine or cosine signals. The information signal to be transmitted (such as sound or image signals) is modulated onto a high-frequency signal at a specific frequency. After modulation, the amplitude of the high-frequency signal changes with the information signal; this process is called amplitude modulation (AM). Similarly, phase modulation (PM) or frequency modulation (FM) can also be applied to high-frequency signals. Modulation techniques allow different types of information to be embedded into carrier signals for transmission. For example, the amplitude, frequency, and phase of the carrier signal can be adjusted to achieve the transmission of different types of information.

[0098] 6) Single-tone signal:

[0099] A single-tone signal is a signal containing only a single frequency, also known as a pure tone signal or a sine wave signal. It is generated by producing a sine wave signal with a fixed frequency in the transmitter. In the receiver, the frequency of the signal can be reliably detected by frequency analysis of the received signal. The transmission principle of a single-tone signal utilizes modulation technology, that is, modulating the information of the signal onto a carrier signal of a higher frequency. By changing the amplitude, frequency, or phase of the carrier, the information is transmitted to the receiver. The receiver uses demodulation technology to extract information such as the amplitude or phase of the modulated carrier signal to recover the transmitted signal. Single-tone signals are commonly used in the modulation and demodulation process of wireless communication systems, such as FM broadcasting, AM broadcasting, and data communication.

[0100] 7) Line of sight (LOS) diameter;

[0101] A line-of-sight (LOS) path is a path from transmitter to receiver where a signal can propagate directly without obstructions. This is an ideal way for wireless signals to propagate because it ensures the signal reaches the receiver with the shortest distance, minimal attenuation, and least interference. In wireless communication, the LOS path is an important propagation mechanism. It provides a high-quality communication link, especially in scenarios requiring high-speed, high-reliability data transmission. Compared to non-line-of-sight (NLOS) paths, LOS paths typically offer better communication performance, including higher data rates, lower bit error rates, and lower latency.

[0102] The technology provided in this application can be applied to various communication systems. For example, the communication system can be a third-generation (3G) communication system (e.g., Universal Mobile Telecommunication System, UMTS), a fourth-generation (4G) communication system (e.g., Long Term Evolution, LTE), a fifth-generation (5G) communication system, a worldwide interoperability for microwave access (WiMAX) or wireless local area network (WLAN) system, a converged system of multiple systems, or a future communication system. The 5G communication system can also be referred to as a new radio (NR) system.

[0103] like Figure 1As shown in the embodiments of this application, the tag is a passive network node in the P-IoT system, which can reflect the carrier signal emitted by the access network device and communicate with the access network device by means of the energy obtained by the induced current.

[0104] In one possible scenario, access network equipment includes, but is not limited to: evolved Node B (eNodeB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home Node B, HNB), baseband unit (BBU), access point (AP) in wireless fidelity (WIFI) system, macro base station, micro base station, wireless relay node, donor node, radio controller in CRAN scenario, wireless backhaul node, transmission point (TP), or transmission and reception point (TRP), etc., and can also be access network equipment in 5G mobile communication system. For example, a next-generation NodeB (gNB), TRP, or TP in an NR system; or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G mobile communication system; or, access network equipment can also be network nodes constituting a gNB or transmission point. Examples include centralized units (CU), distributed units (DU), centralized unit control planes (CU-CP), centralized unit user planes (CU-UP), or radio units (RU), etc. CUs and DUs can be separate or included in the same network element, such as a BBU. RUs can be included in radio units, such as remote radio units (RRU), active antenna units (AAU), or remote radio heads (RRH). Alternatively, access network equipment can also be servers, wearable devices, vehicles, or in-vehicle equipment, etc. For example, the access network equipment in V2X technology can be a roadside unit (RSU). It should be understood that the aforementioned TRP can be a device or module located on the network side of the aforementioned communication system and having corresponding communication functions.The TRP typically contains communication modules, circuits, or chips that perform the corresponding communication functions. The TRP can also be configured with program instructions for the corresponding communication functions.

[0105] For example, in an indoor networking scenario, the access network equipment consists of a BBU and a radio frequency unit (RF unit). When the access network equipment sends information to a passive tag, the BBU generates a baseband signal representing that information and sends the baseband signal to the RF unit. The RF unit processes the baseband signal to obtain an RF signal and sends the RF signal to the passive tag. The RF unit can be an RRU, a pico remote radio unit (pRRU), an AAU, or other units, modules, or devices with RF processing capabilities.

[0106] In one optional implementation, the BBU and the RF unit can be directly connected via optical fiber or cable. In another optional implementation, an aggregation unit can be deployed between the BBU and the RF unit. The aggregation unit is connected to the RF unit via optical fiber and can be a multi-port repeater (HUB) or a radio hub (RHUB) with signal forwarding and combining functions. Optionally, the aggregation unit can be used to expand the number of RF units connected to the BBU and to power the RF units. A single BBU can support the connection of multiple RF units through the aggregation unit.

[0107] Figure 2 An application scenario applicable to embodiments of this application is illustrated. The passive tag 201 requires power from the access network device to maintain tag reception and data transmission. Before storing the passive tag, the access network device needs to wirelessly charge the tag. Only after the tag has sufficient power can it receive signaling sent by the access network device and feed back corresponding modulation signals according to the signaling control information of the access network device. Specifically, the passive tag 201 can receive carrier signals from the access network device 202 and feed back modulation signals to the access network device 203.

[0108] Assuming the maximum equivalent isotropic radiated power (EIRP) of access network 202 is 35 dBm, the path loss (PL) between access network device 202 and the tag must be less than 59 dB to achieve the tag's charging sensitivity. Assuming the inter-site distance (ISD) in the indoor network (i.e., the distance between access network device 202 and access network device 203) is 24 meters, and access network device 202 is ceiling-mounted at a height of 9 meters, with the tag located midway between access network devices 202 and 203, the path loss calculated according to the ISD scenario is approximately 56 dB, leaving only a 3 dB margin for improving the tag's charging sensitivity.

[0109] In actual deployment environments, there may be obstructions or NLOS scenarios, in which case access network device 202 cannot power the tag. Increasing the number and deployment density of access network devices in indoor environments (e.g., deploying access network device 204), also known as increasing site density or densification deployment, can increase the LOS ratio between access network devices and passive tags. However, increasing access network devices requires significant costs, leading to increased networking costs and reduced network cost-effectiveness.

[0110] Based on this, this application provides a communication architecture. Taking a pRRU as an example, a new radio frequency device is added and connected to the pRRU. The pRRU can transmit carrier signals to the passive tag through this radio frequency device. This radio frequency device can be referred to as a helper device or helper module (hereinafter referred to as helper).

[0111] The communication architecture is described in detail below. In this embodiment, the radio frequency device is a helper; the radio frequency unit is the first radio frequency unit, which can be connected to the baseband unit through the aggregation unit (e.g., RHUB), thereby forming a four-level networking architecture of baseband unit + aggregation unit + first radio frequency unit + radio frequency device.

[0112] In one possible implementation, such as Figure 3 As shown, the baseband unit generates data packets and / or control signals, and sends the data packets and / or control signals to the first radio frequency unit through the aggregation unit. The first radio frequency unit sends a carrier signal to the passive tag through a radio frequency device. The passive tag modulates the information transmitted to the radio frequency unit into the reflected signal of the carrier signal, which is received by the first radio frequency unit. Figure 3 The architecture shown is called an integrated networking architecture, in which the first radio frequency unit transmits carrier signals and receives reflected signals.

[0113] Another possible implementation, such as Figure 4 As shown, the baseband unit generates data packets and / or control signals, and sends the data packets and / or control signals to the first radio frequency unit through the aggregation unit. The first radio frequency unit sends the carrier signal to the passive tag through the radio frequency device. The passive tag modulates the information transmitted to the radio frequency unit into the reflected signal of the carrier signal, which is received by the second radio frequency unit. Figure 4 The architecture shown is called a split networking architecture, in which the first radio frequency unit sends a carrier signal and the second radio frequency unit receives the reflected signal.

[0114] It should be noted that the connection between the first RF unit and the RF device can be either wired or wireless. When the connection is wired, the cascade port (mesh port) of the first RF unit and the mesh port of the RF device are connected via a cable, and the remaining ports of the RF device are connected to external antennas. When the connection is wireless, the first RF unit and the RF device communicate via an air interface.

[0115] Based on the above communication architecture, since the radio frequency (RF) device only sends signals to the passive tag and does not receive reflected signals from the passive tag, it has fewer functions and therefore lower costs. At the same time, the distance between the RF device and the passive tag is less than the distance between the RF unit and the passive tag, thus enabling near-end deployment and improving coverage. It also reduces the possibility of obstructions between the RF device and the passive tag, ensuring a line-of-sight (LOS) path between them, thereby achieving a low-cost increase in coverage.

[0116] The communication interaction between the radio frequency unit, radio frequency device, and passive tag in the above communication architecture will be described in detail below with reference to the accompanying drawings. This application embodiment uses the radio frequency unit as the first pRRU and the radio frequency device as a helper as an example for description. It should be noted that the radio frequency unit can be the first radio frequency unit, or a component or device applied to the first radio frequency unit (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the first radio frequency unit (e.g., a radio unit (RU)). The radio frequency device can be a radio frequency device, or a component or device applied to the radio frequency device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the radio frequency device.

[0117] Please see Figure 5 A communication method in this application embodiment includes:

[0118] 501. The first radio frequency unit sends first control information to the radio frequency device, and correspondingly, the radio frequency device receives the first control information from the first radio frequency unit.

[0119] In one possible implementation, the first control information is used to instruct the radio frequency device whether to generate a first signal, wherein the first signal is used to provide a carrier for the passive tag, the carrier being used to carry the information of the passive tag.

[0120] Optionally, the first control information is bit indication information. For example, the first control information may be a 1-bit indication. For instance, if the first control information is "1", it instructs the radio frequency device to generate and transmit a first signal; if the first control information is "0", it instructs the radio frequency device not to generate the first signal. It should be understood that this application does not limit the specific indication content of this 1-bit indication information; it could also be that if the first control information is "0", the radio frequency device transmits the first signal; if the first control information is "1", the radio frequency device does not transmit the first signal.

[0121] The first control information described above is merely an example. In practical applications, the first control information can also be 2-bit indication information or other indication information, which is not limited here.

[0122] Specifically, in this embodiment, the first signal refers to a single-tone carrier signal, also known as a single-tone excitation signal. When the passive tag is in the electromagnetic field emitted by the first radio frequency unit, the tag receives part of the radio frequency energy in the first signal and converts it into direct current to power the circuitry inside the tag, thereby activating the passive tag.

[0123] In another possible implementation, the first control information is used to instruct the radio frequency device to send a first signal. That is, the first radio frequency unit can generate the first signal and send it to the radio frequency device, which then sends the first signal to the passive tag according to the first control information; the specific implementation is not limited here.

[0124] 502. The radio frequency device sends the first signal to the passive tag.

[0125] The radio frequency device sends a first signal to the passive tag according to the first control information, providing a carrier wave for the passive tag. After the passive tag is activated, the data stored in the chip can be modulated into the reflected signal of the first signal to obtain a second signal.

[0126] It should be noted that the transmission carrier frequency of the radio frequency device and the transmission carrier frequency of the first radio frequency unit can be the same or different. In other words, the radio frequency device and the first radio frequency unit can be at the same frequency or at different frequencies; no specific limitation is made here.

[0127] 503. The first radio frequency unit receives the second signal.

[0128] The passive tag generates a second signal, which is a modulated signal of the first signal, and this signal is received by the first radio frequency unit. In some possible implementations, the second signal may also be received by a second radio frequency unit; however, this is not limited here.

[0129] The second signal includes information from the passive tag, which includes one or more of the following: random access information, passive tag identification information, response information, and data information.

[0130] Random access information is used for contention-based access of passive tags. For the storage of passive tags, the ALOHA algorithm is usually adopted. That is, the first radio frequency unit sends a time slot signal passively to the tag, and the tag contends for access in the corresponding time slot. When the tag successfully accesses the tag, the first radio frequency unit feeds back the ACK information corresponding to the tag that successfully accessed the tag. After receiving the ACK information, the tag feeds back the tag's EPC information. The EPC information is the tag's unique identifier. After the first radio frequency unit successfully demodulates the EPC information, the tag is successfully read. If the tag fails to access the tag or does not contend, it will access the tag in a subsequent time slot.

[0131] The identification information of a passive tag can be the EPC of the passive tag, or other information used to identify a passive tag; no specific restrictions are made here.

[0132] The response information may include UL ACK or UL DATA, or other uplink response information, which is not limited here.

[0133] The data information may include sensor information from passive tags or user-defined information, and may also include other data information, which is not limited here.

[0134] Optional, Figure 5 The illustrated embodiment further includes step 504. The timing of step 504 is not limited in this embodiment; step 504 can be executed after step 501 or before step 501.

[0135] 504. The first radio frequency unit sends downlink data signals to the radio frequency device, and correspondingly, the radio frequency device receives downlink data signals from the first radio frequency unit.

[0136] The first radio frequency unit can also send downlink data signals to the radio frequency device. These downlink data signals carry data packets, which are data packets between the first radio frequency unit and the passive tag. The data packets carry the data that the first radio frequency unit needs to send to the passive tag.

[0137] Optional, Figure 5 The illustrated embodiment also includes step 505. Step 505 may be performed after step 504.

[0138] 505. The first radio frequency unit sends second control information to the radio frequency device, and correspondingly, the radio frequency device receives the second control information from the first radio frequency unit.

[0139] In one possible implementation, the signal transmitted by the radio frequency device is controlled by a first radio frequency unit. Specifically, the first radio frequency unit sends second control information to the radio frequency device, which instructs the radio frequency device whether to transmit downlink data signals to the passive tag.

[0140] Optionally, the second control information is bit indication information. For example, the second control information can be a 1-bit indication. For instance, if the second control information is "1", it instructs the radio frequency device to transmit a downlink data signal; if the second control information is "0", it instructs the radio frequency device not to transmit a downlink data signal. It should be understood that this application does not limit the specific indication content of this 1-bit indication information; it could also be that if the second control information is "0", the radio frequency device transmits a downlink data signal; and if the first control information is "1", the radio frequency device does not transmit the first signal.

[0141] The second control information described above is merely an example. In practical applications, the second control information can also be 2-bit indication information or other indication information, which is not limited here.

[0142] Optional, Figure 5 The illustrated embodiment also includes step 506. Step 506 may be performed after step 505.

[0143] 506. Radio frequency equipment sends downlink data signals to passive tags.

[0144] According to the second control information, the radio frequency device sends a downlink data signal to the passive tag, thereby transmitting the data that the first radio frequency unit needs to send to the passive tag to the passive tag through the downlink data signal.

[0145] In this embodiment, the first radio frequency unit instructs the radio frequency device to send a carrier signal or a data signal (such as...) through control information. Figure 6 As shown in the figure, the first radio frequency unit then receives the reflected signal from the passive tag, thereby reducing the obstruction between the radio frequency device and the passive tag, making the path between the radio frequency device and the passive tag a LOS path, and thus achieving low-cost improvement of coverage.

[0146] Please see Figure 7 A communication method in this application embodiment includes:

[0147] 701. The first radio frequency unit sends first control information to the radio frequency device, and correspondingly, the radio frequency device receives the first control information from the first radio frequency unit.

[0148] 702. The radio frequency device sends the first signal to the passive tag.

[0149] 703. The first radio frequency unit receives the second signal.

[0150] In this embodiment, steps 701 to 703 are the same as those described above. Figure 5 Steps 501 to 503 in the illustrated embodiment are similar and will not be described in detail here.

[0151] Optional, Figure 7 The illustrated embodiment also includes step 704. The timing of step 704 is not limited in this embodiment; step 704 can be executed after step 701 or before step 701.

[0152] 704. The first radio frequency unit sends downlink data signals to the passive tag.

[0153] In this embodiment, the radio frequency device may only send the first signal, and the first radio frequency unit sends downlink data signals (such as...) to the passive tag. Figure 8 (as shown), thereby reducing the cost of radio frequency equipment and achieving increased coverage at a low cost.

[0154] Optionally, the radio frequency device may only send the first signal, and the first radio frequency unit may also send a single tone signal to the passive tag to power the passive tag; the specifics are not limited here.

[0155] The information transmission method in the embodiments of this application has been described above. The communication device in the embodiments of this application is described below. Please refer to [link / reference]. Figure 9 The communication device 900 can be used to perform Figure 5 or Figure 7 The process executed by the radio frequency device in the illustrated embodiment can be specifically described in the relevant descriptions of the foregoing method embodiments. The communication device 900 can be a network device, a component or device applied to a network device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of a network device. The communication device can also be a terminal device, a component or device applied to a terminal device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of a terminal device.

[0156] The communication device 900 includes an interface module 901 and a processing module 902.

[0157] The processing module 902 is used for data processing. The interface module 901 can implement corresponding communication functions. The interface module 901 can also be called a communication interface or a communication module.

[0158] Optionally, the communication device 900 may further include a storage module, which can be used to store program code, program instructions and / or data. The processing module 902 can read the instructions and / or data in the storage module so that the communication device 900 can implement the aforementioned method embodiments.

[0159] The communication device 900 can be used to perform the actions performed by the radio frequency (RF) device in the above method embodiments. For example, it can be an RF device, a communication module within an RF device, or a circuit or chip within an RF device responsible for communication functions. The communication device 900 can be an RF device or a component configurable within an RF device. The processing module 902 is used to perform processing-related operations on the RF device side in the above method embodiments. The interface module 901 is used to perform reception-related operations on the RF device side in the above method embodiments.

[0160] Optionally, the interface module 901 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiments. The receiving module is used to perform the receiving operation in the above method embodiments.

[0161] It should be noted that the communication device 900 may include a transmitting module but not a receiving module. Alternatively, the communication device 900 may include a receiving module but not a transmitting module. Specifically, it depends on whether the above-described scheme performed by the communication device 900 includes both transmitting and receiving actions. For example, the communication device 900 is used to perform the above-described... Figure 5 or Figure 7 The actions performed by the radio frequency device in the illustrated embodiment are shown above. For details, please refer to the above. Figure 5 or Figure 7 The relevant descriptions in the illustrated embodiments will not be elaborated here.

[0162] For example, the communication device 900 is used to execute the following scheme:

[0163] Interface module 901 is used to receive the first control information;

[0164] The processing module 902 is used to send a first signal according to the first control information. The first signal is used to provide a carrier wave for the passive tag, and the carrier wave is used to carry the information of the passive tag.

[0165] In one possible implementation, the first signal is a single-tone signal.

[0166] In another possible implementation, the first control information is a 1-bit indication information, and the processing module 902 is used to send a first signal according to the first control information, including:

[0167] If the first control information is "1", then the processing module 902 is specifically used to send the first signal; or,

[0168] If the first control information is "0", then the processing module 902 is specifically used to send the first signal.

[0169] In another possible implementation, the information of the passive tag includes one or more of the following: random access information, passive tag identification information, response information, and data information.

[0170] In another possible implementation, interface module 901 is also used to receive downlink data signals, which are used to carry data packets;

[0171] The interface module 901 is also used to receive second control information;

[0172] The processing module 902 is also used to send downlink data signals according to the second control information.

[0173] In another possible implementation, the second control information is a 1-bit indication information. The processing module 902 is further configured to send a downlink data signal based on the second control information, including:

[0174] If the second control information is "1", then the processing module 902 is specifically used to send downlink data signals; or,

[0175] If the second control information is "0", then the processing module 902 is specifically used to send downlink data signals.

[0176] In another possible implementation, the data message is a data message between the first radio frequency unit and the passive tag.

[0177] It should be understood that the specific procedures for each module to perform the above-mentioned corresponding processes have been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0178] The processing module 902 in the above embodiments can be implemented by at least one processor or processor-related circuitry. The interface module 901 can be implemented by a transceiver or transceiver-related circuitry. The interface module 901 can also be referred to as a communication module or communication interface. The storage module can be implemented by at least one memory.

[0179] The following is another structural schematic diagram of the communication device according to an embodiment of this application. Please refer to... Figure 10 Communication devices can be used to perform Figure 5 or Figure 7 The process executed by the radio frequency unit in the illustrated embodiment can be found in the relevant descriptions in the foregoing method embodiments.

[0180] The communication device 1000 includes an interface module 1001. Optionally, a processing module 1002.

[0181] The processing module 1002 is used for data processing. The interface module 1001 can implement corresponding communication functions. The interface module 1001 can also be called a communication interface or a communication module.

[0182] Optionally, the communication device 1000 may further include a storage module, which can be used to store program code, program instructions and / or data. The processing module 1002 can read the instructions and / or data in the storage module so that the communication device 1000 can implement the aforementioned method embodiments.

[0183] The communication device 1000 can be used to perform the actions performed by the radio frequency unit in the above method embodiments. For example, it can be the radio frequency unit, a communication module within the radio frequency unit, or a circuit or chip within the radio frequency unit responsible for communication functions. The communication device 1000 can be the radio frequency unit or a component configurable within the radio frequency unit. The processing module 1002 is used to perform processing-related operations on the radio frequency unit side in the above method embodiments. The interface module 1001 is used to perform reception-related operations on the radio frequency unit side in the above method embodiments.

[0184] Optionally, the interface module 1001 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiments. The receiving module is used to perform the receiving operation in the above method embodiments.

[0185] It should be noted that the communication device 1000 may include a transmitting module but not a receiving module. Alternatively, the communication device 1000 may include a receiving module but not a transmitting module. Specifically, it depends on whether the above-described scheme performed by the communication device 1000 includes both transmitting and receiving actions. For example, the communication device 1000 is used to perform the above-described... Figure 5 or Figure 7 The actions performed by the radio frequency unit in the illustrated embodiment are shown above. For details, please refer to the above. Figure 5 or Figure 7 The relevant descriptions in the illustrated embodiments will not be elaborated here.

[0186] For example, the communication device 1000 is used to execute the following scheme:

[0187] Processing module 1002 is used to generate first control information;

[0188] Interface module 1001 is used to send first control information, which is used to instruct the radio frequency device to send a first signal, and the first signal is used to provide a carrier for the passive tag, and the carrier is used to carry the information of the passive tag.

[0189] The interface module 1001 is also used to receive a second signal, which includes the modulated signal of the first signal.

[0190] In one possible implementation, the first signal is a single-tone signal.

[0191] In another possible implementation, the first control information is a 1-bit indication, for example:

[0192] If the first control information is "1", then the first control information is used to instruct the radio frequency device to send a first signal; or,

[0193] If the first control information is "0", then the first control information is used to instruct the radio frequency device to send the first signal.

[0194] In another possible implementation, the information of the passive tag includes one or more of the following: random access information, passive tag identification information, response information, and data information.

[0195] In another possible implementation, the interface module 1001 is also used to send downlink data signals, which are used to carry data packets;

[0196] The interface module 1001 is also used to send second control information, which is used to instruct the radio frequency device to send downlink data signals.

[0197] In another possible implementation, the second control information is a 1-bit indication, for example:

[0198] If the second control information is "1", then the second control information is used to instruct the radio frequency device to send downlink data signals; or,

[0199] If the second control information is "0", then the second control information is used to instruct the radio frequency device to send downlink data signals.

[0200] In another possible implementation, the data message is a data message between the first radio frequency unit and the passive tag.

[0201] It should be understood that the specific procedures for each module to perform the above-mentioned corresponding processes have been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0202] The processing module 1002 in the above embodiments can be implemented by at least one processor or processor-related circuitry. The interface module 1001 can be implemented by a transceiver or transceiver-related circuitry. The interface module 1001 can also be referred to as a communication module or communication interface. The storage module can be implemented by at least...

[0203] The following describes a communication device provided in an embodiment of this application. Please refer to [link / reference]. Figure 11 , Figure 11This is a schematic diagram of a communication device provided in an embodiment of this application. The communication device may be a radio frequency device or radio frequency unit as described in the above method embodiments, or it may be a chip, chip system, or processor that supports the radio frequency device or radio frequency unit in implementing the above methods. This communication device can be used to implement the methods described in the above method embodiments, and for details, please refer to the descriptions in the above method embodiments.

[0204] The communication device may include one or more processors 1101, which are connected to a memory 1102, an input / output unit 1103, and a bus 1104. The processor 1101 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication device (e.g., base station, baseband chip, terminal, terminal chip, DU or CU, etc.), execute software programs, and process data from the software programs.

[0205] Optionally, the communication device may include one or more memories 1102, which may store instructions that can be executed on the processor 1101, causing the communication device to perform the methods described in the above method embodiments. Optionally, the memories 1102 may also store data. The processor 1101 and the memories 1102 may be configured separately or integrated together.

[0206] Optionally, the communication device may also include a transceiver and an antenna. A transceiver, also called a transceiver unit, transceiver, or transceiver circuit, is used to implement transmission and reception functions. A transceiver may include a receiver and a transmitter; the receiver, also called a receiver circuit, is used to implement the receiving function; the transmitter, also called a transmitter or transmitting circuit, is used to implement the transmitting function.

[0207] In another possible design, the processor 1101 may include a transceiver for implementing receive and transmit functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receive and transmit functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or it may be used for transmitting or relaying signals.

[0208] In another possible design, the processor 1101 may optionally store instructions that, when executed, cause the communication device to perform the methods described in the above method embodiments. The instructions may be stored in the processor 1101; in this case, the processor 1101 may be implemented in hardware.

[0209] In another possible design, the communication device may include a circuit that can perform the transmitting or receiving or communication functions of the radio frequency device or radio frequency unit in the aforementioned method embodiments. The processor and transceiver described in the embodiments of this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductors (CMOS), n-type metal-oxide-semiconductor (NMOS), p-type metal oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0210] The communication device described in the above embodiments may be a radio frequency device or a radio frequency unit, but the scope of the communication device described in the embodiments of this application is not limited thereto, and the structure of the communication device may be unrestricted. Figure 11 The communication device can be a standalone device or part of a larger device. For example, the communication device can be:

[0211] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0212] (2) A collection of one or more ICs, optionally including a storage component for storing data and instructions;

[0213] (3) ASIC, such as modem;

[0214] (4) Modules that can be embedded in other devices;

[0215] (5) Receivers, terminals, smart terminals, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.

[0216] (6) Others, etc.

[0217] For cases where the communication device can be a chip or a chip system, please refer to [link / reference]. Figure 12 The diagram shows the structure of the chip. Figure 12 The chip 1200 shown includes a processor 1201 and an interface 1202. Optionally, it may also include a memory 1203. The number of processors 1201 can be one or more, and the number of interfaces 1202 can be multiple.

[0218] For cases where the chip is used to implement the functions of the radio frequency device or radio frequency unit in the embodiments of this application:

[0219] The interface 1202 is used to receive or output signals;

[0220] The processor 1201 is used to perform data processing operations of radio frequency devices or radio frequency units.

[0221] In one possible implementation, the embodiments of this application can be applied to the baseband chip of a network device or terminal device. Transmitting / receiving can correspond to actions related to signal transmission or reception, and can be understood as transmitting / receiving radio frequency signals in the analog / intermediate frequency / radio frequency domain, or as initiating or controlling transmission / reception operations in the digital domain, or a combination of both. For example, when a device transmits or receives various signals, the processor in the device implements the transmission or reception by driving or controlling the radio frequency circuit. Therefore, during signal transmission and reception, the processor is the decision-maker or controller of the transmission and reception operation, while the radio frequency circuit is the specific executor of the transmission and reception; both, in conjunction with the antenna, can jointly realize the transmission and reception operation. The processor includes, but is not limited to, CPUs, DSPs, microprocessors, etc., and the radio frequency circuit includes, but is not limited to, radio frequency chips, radio frequency front-ends, PAs, LNAs, mixers, filters, duplexers, etc., and may also selectively include antennas integrated with the radio frequency circuit.

[0222] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features according to requirements in certain scenarios. Correspondingly, the communication device given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0223] It should be understood that the processor in the embodiments of this application can be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0224] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAK are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0225] This application also provides a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the methods described in the foregoing embodiments.

[0226] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the methods described in the foregoing embodiments.

[0227] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0228] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0229] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0230] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0231] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0232] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

Claims

1. A communication method, characterized in that, Applied to radio frequency devices, the method includes: Receive first control information; A first signal is sent according to the first control information, the first signal being used to provide a carrier wave, the carrier wave being used to carry information of a passive tag.

2. The method according to claim 1, characterized in that, The first signal is a single-tone signal.

3. The method according to claim 1 or 2, characterized in that, The first control information is a 1-bit indication information, and sending the first signal according to the first control information includes: If the first control information is "1", send the first signal; or... If the first control information is "0", send the first signal.

4. The method according to any one of claims 1 to 3, characterized in that, The information of the passive tag includes one or more of the following: random access information, identification information of the passive tag, response information, and data information.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Receive downlink data signals, which are used to carry data packets; Receive second control information; The downlink data signal is sent according to the second control information.

6. The method according to claim 5, characterized in that, The second control information is a 1-bit indication information, and the step of sending the downlink data signal according to the second control information includes: If the second control information is "1", send the downlink data signal; or... If the second control information is "0", the downlink data signal is sent.

7. A communication method, characterized in that, Applied to passive tags, the method includes: Receive a first signal, the first signal being used to provide a carrier wave, the carrier wave being used to carry information of a passive tag; A second signal is generated, which is the modulated signal of the first signal.

8. The method according to claim 7, characterized in that, The first signal is a single-tone signal.

9. The method according to claim 7 or 8, characterized in that, The information of the passive tag includes one or more of the following: random access information, identification information of the passive tag, response information, and data information.

10. The method according to any one of claims 7 to 9, characterized in that, The method further includes: The system receives downlink data signals, which are used to carry data packets, and the data packets are data packets between the first radio frequency unit and the passive tag.

11. A communication method, characterized in that, Applied to a first radio frequency unit, the method includes: Send first control information, the first control information being used to instruct the radio frequency device to send a first signal, the first signal being used to provide a carrier for the passive tag, the carrier being used to carry the information of the passive tag; Receive a second signal, which is a modulated signal of the first signal.

12. The method according to claim 11, characterized in that, The first signal is a single-tone signal.

13. The method according to claim 11 or 12, characterized in that, The first control information is a 1-bit indication information, wherein: If the first control information is "1", the first control information is used to instruct the radio frequency device to send the first signal; or... If the first control information is "0", the first control information is used to instruct the radio frequency device to send the first signal.

14. The method according to any one of claims 11 to 13, characterized in that, The information of the passive tag includes one or more of the following: random access information, identification information of the passive tag, response information, and data information.

15. The method according to any one of claims 11 to 14, characterized in that, The method further includes: Send downlink data signals, which are used to carry data packets; Send a second control message, which instructs the radio frequency device to send the downlink data signal.

16. A communication device, characterized in that, It includes modules or units for performing the method as described in any one of claims 1 to 6, or modules or units for performing the method as described in any one of claims 7 to 10, or modules or units for performing the method as described in any one of claims 11 to 15.

17. A communication device, characterized in that, include: A processor for executing a program that causes the communication device to perform the method as claimed in any one of claims 1 to 6, or causes the communication device to perform the method as claimed in any one of claims 7 to 10, or causes the communication device to perform the method as claimed in any one of claims 11 to 15.

18. A communication system, characterized in that, include: A communication device for performing the method as claimed in any one of claims 1 to 6, a communication device for performing the method as claimed in any one of claims 7 to 10, and a communication device for performing the method as claimed in any one of claims 11 to 15.

19. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 6, or cause the computer to perform the method of any one of claims 7 to 10, or cause the computer to perform the method of any one of claims 11 to 15.

20. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as claimed in any one of claims 1 to 6, or cause the computer to perform the method as claimed in any one of claims 7 to 10, or cause the computer to perform the method as claimed in any one of claims 11 to 15.

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