Signal transmission method and device

Abstract

The present application discloses a signal transmission method and apparatus, wherein the method comprises: a terminal device sends a first uplink control signal to a network device, the first uplink control signal is used to instruct the network device to send a first downlink shared signal; the network device sends the first downlink shared signal to the terminal device according to the first uplink control signal. Alternatively, the network device sends a second downlink control signal to the terminal device, the second downlink control signal is used to instruct the terminal device to send a first uplink shared signal; the terminal device sends the first uplink shared signal to the network device according to the second downlink control signal. The embodiment of the present application discloses that before the network device schedules the signal, a signal receiving node instructs a signal sending node to send a signal, and this process can effectively reduce the exposed node problem of the signal receiving node.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a signal transmission method and device. Background Art

[0002] Wireless communication technologies deployed on unlicensed spectrum generally use or share spectrum resources in a competitive manner. Generally, before sending a signal, a station will first monitor whether the unlicensed spectrum is idle, such as judging its busy or idle state by the size of the received power on the unlicensed spectrum. If the received power is less than a certain threshold, the unlicensed spectrum is considered to be idle, and the signal can be sent on the unlicensed spectrum, otherwise no signal is sent. This mechanism is called Carrier Sense Multiple Access with Collision Avoid (CSMA / CA) or Listen Before Talk (LBT).

[0003] In the 3rd Generation Partnership Project (3GPP) system (such as LAA / eLAA / NRU) and Wireless Fidelity (Wi-Fi) system (such as 802.11a / b / g / n / ac / ax, etc.), before transmitting data, the transmitting device needs to ensure that the channel is idle through a random backoff-based channel listening mechanism to obtain a certain channel occupancy time (COT). During this time, when transmitting signals, there is no need to perform random backoff listening again. The random backoff mechanism ensures fairness among nodes using unlicensed frequency bands.

[0004] Currently in the 3GPP system, due to the limitations of the system implementation framework, it is impossible for the receiving end to send a signal to the transmitting end in a short time interval to achieve a two-way handshake. In addition, compared with the low-frequency band, since the transmission carrier frequency of the high-frequency band channel is higher and the channel attenuation is larger, in order to ensure a certain coverage range, beamforming technology is usually used to increase the transmission power in a certain direction. The use of omnidirectional beams for channel sensing is called omnidirectional LBT, and the use of directional beams for channel sensing is called directional LBT. In high-frequency application scenarios, if traditional omnidirectional LBT is used at the receiving end, it may bring about the problem of exposed nodes, that is, although the receiving end detects interference, the interference direction is not in the direction of the received signal, and it will not cause serious interference to the reception. As a result, the omnidirectional LBT at the receiving end will reduce the efficiency of space division multiplexing. Summary of the invention

[0005] The embodiment of the present application provides a signal transmission method and device, so that before a network device schedules a signal, a signal receiving node instructs a signal sending node to send a signal, thereby reducing the problem of exposed nodes.

[0006] In a first aspect, a signal transmission method is provided, which is applied to a network device, and the method includes:

[0007] Receiving a first control signal from a terminal device, where the first control signal is used by the network device to determine whether to send a first downlink sharing signal;

[0008] The first downlink shared signal is sent according to the first control signal.

[0009] In a possible implementation, the first control signal includes indication information for indicating channel usage of the terminal device, where the channel usage indicates a result of detection performed by the terminal device according to the first space reception parameter.

[0010] In a possible implementation manner, the indication information includes a channel sensing result, the channel sensing result includes whether the channel is idle or not idle, and sending the first downlink shared signal according to the first control signal includes:

[0011] The first downlink shared signal is sent when the channel is idle.

[0012] In a possible implementation, the indication information includes a channel interference detection result, and sending the first downlink shared signal according to the first control signal includes: when an interference value corresponding to the channel interference detection result is less than a preset threshold value, sending the first downlink shared signal.

[0013] In a possible implementation, before receiving the first control signal from the terminal device, the method further includes: sending a second control signal, where the second control signal is used to indicate a resource for the terminal device to send the first control signal.

[0014] In a possible implementation, the second control signal also includes a transmission configuration indication, and the transmission configuration indication is used by the terminal device to determine a first spatial reception parameter, and the first spatial reception parameter is consistent with a spatial reception parameter for sending the first downlink shared signal.

[0015] In a possible implementation manner, the first control signal is a signal sent according to a first period, the first period is an interval for sending the first control signal, and before receiving the first control signal from the terminal device, the method further includes:

[0016] The resource for sending the first control signal by the terminal device is indicated through upper layer control signaling.

[0017] In a possible implementation manner, the resource for instructing the terminal device to send the first control signal through upper layer control signaling further includes:

[0018] A third control signal is sent, and the resource for sending the first control signal is activated by the third control signal.

[0019] In a possible implementation, the upper layer control signaling or the third control signal also includes a transmission configuration indication, and the transmission configuration indication is used by the terminal device to determine a first spatial reception parameter, and the first spatial reception parameter is consistent with the spatial reception parameter for sending the first downlink shared signal.

[0020] In a possible implementation manner, when the first control signal is a signal sent according to a first period, the first space reception parameters corresponding to the signal of each period are different.

[0021] In a possible implementation, the first control signal is sent via a periodic physical uplink control channel PUCCH, a semi-statically scheduled physical uplink shared channel PUSCH, an unscheduled PUSCH, a configured scheduled PUSCH, a channel sounding reference signal SRS, or a physical random access channel PRACH.

[0022] In one possible implementation, when the signal length of the second control signal or the first downlink shared signal is greater than a first preset length, channel sensing is performed in a beam direction determined by a second spatial receiving parameter, and the beam width determined by the second spatial receiving parameter is an omnidirectional beam width.

[0023] In a possible implementation manner, when the time interval between the first control signal and the first downlink shared signal is greater than a first preset value, channel sensing is performed according to a beam direction determined by a second spatial reception parameter.

[0024] In an embodiment of the present application, before the network device schedules a downlink shared signal, the terminal device prompts the network device to send a signal, so that the direction of channel usage determined by the terminal device before receiving the downlink shared signal is the direction of receiving the downlink shared signal, effectively reducing the exposed node problem of the terminal device (receiving node).

[0025] In a second aspect, a signal transmission method is provided, which is applied to a network device, and the method includes:

[0026] Sending a fourth control signal to the terminal device, where the fourth control signal is used to instruct the terminal device to send a first uplink shared signal;

[0027] Receive the first uplink shared signal sent by the terminal device according to the fourth control signal.

[0028] In a possible implementation manner, before sending the fourth control signal, the method further includes:

[0029] A fifth control signal is sent, where the fifth control signal is used to instruct the terminal device to detect resources for the fourth control signal.

[0030] In a possible implementation, before sending the fourth control signal to the terminal device, a third spatial reception parameter is used to perform channel detection, and the third spatial reception parameter is a spatial reception parameter of the first uplink shared signal.

[0031] In one possible implementation, when the signal length of the fifth control signal is greater than the second preset length, channel monitoring is performed in the beam direction determined by the fourth spatial reception parameter, and the beam coverage range determined by the fourth spatial reception parameter is greater than the beam coverage range determined by the third spatial reception parameter.

[0032] In an embodiment of the present application, before the network device schedules the uplink shared signal, the network device prompts the terminal device to send a signal so that the direction in which the network device performs channel monitoring before receiving the uplink shared signal is the direction in which the uplink shared signal is received, thereby effectively reducing the exposed node problem of the network device (receiving node).

[0033] In a third aspect, a signal transmission method is provided, characterized in that it is applied to a terminal device, and the method includes:

[0034] Perform channel monitoring, and send a first control signal to the network device when the channel is idle, wherein the first control signal is used to instruct the network device to send a first downlink shared signal;

[0035] The first downlink sharing signal is received from a network device.

[0036] In a possible implementation manner, performing channel monitoring includes:

[0037] Channel sensing is performed in a beam direction determined by the first spatial reception parameter.

[0038] In a possible implementation, the first control signal includes indication information for indicating channel usage of the terminal device, and the channel usage indicates a result of detection performed by the terminal device according to the first spatial reception parameter.

[0039] In a possible implementation manner, before performing channel monitoring and sending a first control signal to the network device when the channel is idle, the method further includes:

[0040] A second control signal is received, and a resource for sending the first control signal is determined according to the second control signal.

[0041] In a possible implementation, the second control signal further includes a transmission configuration indication, where the transmission configuration indication is used to determine a first space reception parameter, where the first space reception parameter is consistent with a space reception parameter for receiving the first downlink shared signal.

[0042] In a possible implementation, the first control signal is a signal sent according to a first period, the first period is a sending interval of the first control signal, and before performing channel sensing and sending the first control signal to the network device when the channel is idle, the method further includes:

[0043] The resource for sending the first control signal is determined through an indication of upper layer control signaling.

[0044] In a possible implementation manner, determining the resource for sending the first control signal through an indication of an upper layer control signaling further includes:

[0045] A third control signal is received, and a resource for sending the first control signal is activated through the third control signal.

[0046] In a possible implementation, the upper layer control signaling or the third control signal also includes a transmission configuration indication, and the transmission configuration indication is used to determine a first space reception parameter, and the first space reception parameter is consistent with a space reception parameter for receiving the first downlink shared signal.

[0047] In a possible implementation manner, when the first control signal is a signal sent according to a first period, the first space reception parameters corresponding to the signal of each period are different.

[0048] In a possible implementation manner, the format of the first control signal is format 0 / 1.

[0049] In a possible implementation manner, the format of the first control signal is format 2 / 3, the format 2 / 3 is scrambled by a first scrambling code, and the first scrambling code is used for another terminal device to demodulate the first control signal.

[0050] In a fourth aspect, a signal transmission method is provided, which is applied to a terminal device, and the method includes:

[0051] receiving a fourth control signal sent by a network device, wherein the fourth control signal is used to instruct the terminal device to send a first uplink sharing signal;

[0052] A first uplink sharing signal is sent to the network device according to the fourth control signal.

[0053] In a possible implementation manner, before receiving the fourth control signal, the method further includes:

[0054] A fifth control signal is received, and a resource for detecting the fourth control signal is determined according to the fifth control signal.

[0055] In a possible implementation, when the signal length of the first uplink shared signal is greater than a second preset length, channel sensing is performed in a beam direction determined by a fourth spatial receiving parameter, and the first uplink shared signal is sent when the channel is idle.

[0056] In a possible implementation, when the time interval between the fourth control signal and the first uplink shared signal is greater than a second preset value, channel sensing is performed in a beam direction determined by a fourth spatial receiving parameter, and the first uplink shared signal is sent when the channel is idle.

[0057] In a fifth aspect, a network device is provided, the network device comprising:

[0058] A receiving module, configured to receive a first control signal from a terminal device, wherein the first control signal is used by a network device to determine whether to send a first downlink sharing signal;

[0059] A sending module is used to send the first downlink shared signal according to the first control signal.

[0060] In a possible implementation, the first control signal includes indication information for indicating channel usage of the terminal device, where the channel usage indicates a result of detection performed by the terminal device according to the first space reception parameter.

[0061] In a possible implementation manner, the indication information includes a channel sensing result, the channel sensing result includes whether the channel is idle or not idle, and the sending module is specifically configured to:

[0062] The first downlink shared signal is sent when the channel is idle.

[0063] In a possible implementation manner, the indication information includes a channel interference detection result, and the sending module is specifically configured to:

[0064] When the interference value corresponding to the channel interference detection result is less than a preset threshold value, the first downlink shared signal is sent.

[0065] In a possible implementation, the sending module is further configured to:

[0066] Send a second control signal, where the second control signal is used to indicate the resource for the terminal device to send the first control signal.

[0067] In a possible implementation, the second control signal also includes a transmission configuration indication, and the transmission configuration indication is used by the terminal device to determine a first spatial reception parameter, and the first spatial reception parameter is consistent with a spatial reception parameter for sending the first downlink shared signal.

[0068] In a possible implementation, the first control signal is a signal sent according to a first period, the first period is an interval for sending the first control signal, and the sending module is further used to: instruct the terminal device through upper-layer control signaling on resources for sending the first control signal.

[0069] In a possible implementation, the sending module is further configured to:

[0070] A third control signal is sent, and the resource for sending the first control signal is activated by the third control signal.

[0071] In a possible implementation, the upper layer control signaling or the third control signal also includes a transmission configuration indication, and the transmission configuration indication is used by the terminal device to determine a first spatial reception parameter, and the first spatial reception parameter is consistent with the spatial reception parameter for sending the first downlink shared signal.

[0072] In a possible implementation manner, when the first control signal is a signal sent according to a first period, the first space reception parameters corresponding to the signal of each period are different.

[0073] In a possible implementation, the first control signal is sent via a periodic physical uplink control channel PUCCH, a semi-statically scheduled physical uplink shared channel PUSCH, an unscheduled PUSCH, a configured scheduled PUSCH, a channel sounding reference signal SRS, or a physical random access channel PRACH.

[0074] In one possible implementation, the device also includes a processing module for performing channel sensing in a beam direction determined by a second spatial receiving parameter when the signal length of the second control signal or the first downlink shared signal is greater than a first preset length, and the beam width determined by the second spatial receiving parameter is an omnidirectional beam width.

[0075] In a possible implementation, the processing module is further used to: when the time interval between the first control signal and the first downlink shared signal is greater than a first preset value, perform channel sensing according to the beam direction determined by the second spatial reception parameter.

[0076] In a sixth aspect, a network device is provided, the network device comprising:

[0077] A sending module, used to send a fourth control signal to the terminal device, wherein the fourth control signal is used to instruct the terminal device to send a first uplink shared signal;

[0078] A receiving module is used to receive the first uplink shared signal sent according to the fourth control signal.

[0079] In a possible implementation, the sending module is further configured to:

[0080] A fifth control signal is sent, where the fifth control signal is used to instruct the terminal device to detect resources for the fourth control signal.

[0081] In a possible implementation, the device further includes a processing module for performing channel detection using a third spatial reception parameter before sending the fourth control signal to the terminal device, where the third spatial reception parameter is a spatial reception parameter of the first uplink shared signal.

[0082] In one possible implementation, the processing module is also used to perform channel monitoring in the beam direction determined by the fourth space receiving parameter when the signal length of the second control signal is greater than the first preset length, and the beam coverage range determined by the fourth space receiving parameter is greater than the beam coverage range determined by the third space receiving parameter.

[0083] In a seventh aspect, a terminal device is provided, the device comprising:

[0084] A processing module, used for channel monitoring;

[0085] A sending module, used for sending a first control signal to the network device when the channel is idle, wherein the first control signal is used for instructing the network device to send a first downlink sharing signal;

[0086] The receiving module is used to receive the first downlink sharing signal from the network device.

[0087] In a possible implementation manner, the processing module is specifically configured to:

[0088] Channel sensing is performed in a beam direction determined by the first spatial reception parameter.

[0089] In a possible implementation, the first control signal includes indication information for indicating channel usage of the terminal device, and the channel usage indicates a result of detection performed by the terminal device according to the first spatial reception parameter.

[0090] In a possible implementation, the receiving module is further configured to:

[0091] A second control signal is received, and a resource for sending the first control signal is determined according to the second control signal.

[0092] In a possible implementation, the second control signal further includes a transmission configuration indication, where the transmission configuration indication is used to determine a first space reception parameter, where the first space reception parameter is consistent with a space reception parameter for receiving the first downlink shared signal.

[0093] In a possible implementation manner, the first control signal is a signal sent according to a first period, the first period is an interval for sending the first control signal, and the receiving module is further used to:

[0094] The resource for sending the first control signal is determined through an indication of upper layer control signaling.

[0095] In a possible implementation, the receiving module is further configured to:

[0096] A third control signal is received, and a resource for sending the first control signal is activated through the third control signal.

[0097] In a possible implementation, the upper layer control signaling or the third control signal also includes a transmission configuration indication, and the transmission configuration indication is used to determine a first space reception parameter, and the first space reception parameter is consistent with a space reception parameter for receiving the first downlink shared signal.

[0098] In a possible implementation manner, when the first control signal is a signal sent according to a first period, the first space reception parameters corresponding to the signal of each period are different.

[0099] In a possible implementation manner, the format of the first control signal is format 0 / 1.

[0100] In a possible implementation manner, the format of the first control signal is format 2 / 3, the format 2 / 3 is scrambled by a first scrambling code, and the first scrambling code is used for another terminal device to demodulate the first control signal.

[0101] In an eighth aspect, a terminal device is provided, the device comprising:

[0102] A receiving module, used to receive a fourth control signal sent by a network device, wherein the fourth control signal is used to instruct the terminal device to send a first uplink sharing signal;

[0103] A sending module is used to send a first uplink sharing signal to the network device according to the fourth control signal.

[0104] In a possible implementation, the receiving module is further configured to:

[0105] A fifth control signal is received, and a resource for detecting the fourth control signal is determined according to the fifth control signal.

[0106] In one possible implementation, the device also includes a processing module for performing channel sensing in a beam direction determined by a fourth spatial receiving parameter when a signal length of the first uplink shared signal is greater than a second preset length, and sending the first uplink shared signal when the channel is idle.

[0107] In a possible implementation, when the time interval between the fourth control signal and the first uplink shared signal is greater than a second preset value, channel sensing is performed in a beam direction determined by a fourth spatial receiving parameter, and the first uplink shared signal is sent when the channel is idle.

[0108] In a ninth aspect, a communication device is provided, the device comprising at least one processor, wherein the at least one processor is coupled to at least one memory:

[0109] The at least one processor is used to execute a computer program or instruction stored in the at least one memory, so that the apparatus performs the method as described in any one of the first aspect or the second aspect.

[0110] In a tenth aspect, a communication device is provided, the device comprising at least one processor, wherein the at least one processor is coupled to at least one memory:

[0111] The at least one processor is used to execute a computer program or instruction stored in the at least one memory, so that the device performs the method as described in any one of the third aspect or the fourth aspect.

[0112] In the eleventh aspect, an embodiment of the present application provides a chip system, comprising: a processor, the processor is coupled to a memory, the memory is used to store programs or instructions, when the program or instructions are executed by the processor, the chip system implements the method in the above-mentioned first aspect or any possible implementation of the first aspect, or executes the method in the above-mentioned second aspect or any possible implementation of the second aspect, or executes the method in the above-mentioned third aspect or any possible implementation of the third aspect, or the above-mentioned fourth aspect or any possible implementation of the fourth aspect.

[0113] Optionally, the chip system also includes an interface circuit, which is used to interact with code instructions to the processor.

[0114] Optionally, there may be one or more processors in the chip system, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc. When implemented by software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

[0115] Optionally, the memory in the chip system may be one or more. The memory may be integrated with the processor or may be separately provided with the processor, which is not limited in the present application. Exemplarily, the memory may be a non-transient processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip or may be provided on different chips. The present application does not specifically limit the type of memory and the arrangement of the memory and the processor.

[0116] In the twelfth aspect, a readable storage medium is provided, characterized in that it is used to store instructions, and when the instructions are executed, the method as described in any one of the first aspect or the second aspect is implemented, or the method as described in any one of the third aspect or the fourth aspect is implemented.

[0117] In the thirteenth aspect, a computer program product is provided. When a computer reads and executes the computer program product, the computer executes the method as described in the first aspect or the second aspect, or the computer executes the method as described in the third aspect or the fourth aspect.

[0118] In the fourteenth aspect, a communication system is provided, comprising the network device as described in the fifth aspect and the terminal device as described in the sixth aspect, or comprising the network device as described in the sixth aspect and the terminal device as described in the eighth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0119] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below.

[0120] Figure 1 A schematic diagram of a communication system provided in an embodiment of the present application;

[0121] Figure 2A A schematic diagram of a signal transmission method flow chart provided in an embodiment of the present application;

[0122] Figure 2B A schematic diagram of a process for calling a downlink shared signal provided in an embodiment of the present application;

[0123] Figure 2C A schematic diagram of a communication process based on terminal device channel monitoring provided in an embodiment of the present application;

[0124] Figure 2D A schematic diagram of periodic signal transmission provided in an embodiment of the present application;

[0125] Figure 2E Another schematic diagram of periodic signal transmission provided in an embodiment of the present application;

[0126] Figure 3A A schematic diagram of another signal transmission method flow chart provided in an embodiment of the present application;

[0127] Figure 3B A schematic diagram of a process for calling an uplink shared signal provided in an embodiment of the present application;

[0128] Figure 3C A schematic diagram of a communication process based on network device channel monitoring provided in an embodiment of the present application;

[0129] Figure 4 A structural block diagram of a network device provided in an embodiment of the present application;

[0130] Figure 5 A block diagram of a terminal device structure provided in an embodiment of the present application;

[0131] Figure 6 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0132] Figure 7 A schematic diagram of a communication system provided for an embodiment of the present application. DETAILED DESCRIPTION

[0133] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0134] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0135] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0136] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0137] First, the terms involved in the embodiments of the present application are introduced with reference to the drawings.

[0138] Network equipment: An entity on the network side used to transmit or receive signals. It is the information exchange center of mobile communications. It is mainly responsible for managing terminal devices within a certain wireless coverage area and completing functions such as sending and receiving wireless signals and wireless resource management. It can be a base station or an access point, or it can refer to a device in the access network that communicates with wireless terminals through one or more sectors on the air interface. The base station can be used to convert received air frames to and from IP packets, and act as a router between the wireless terminal and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) network. The base station can also coordinate the attribute management of the air interface. For example, the base station can be a base station (Base Transceiver Station, BTS) in Global System of Mobile communication (GSM) or Code Division Multiple Access (CDMA), a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved base station (Evolutional Node B, eNB or eNodeB) in Long Term Evolution (LTE), or a relay station or access point, or a base station (gNB) in a 5G network, or an IAB node (access and backhaul integrated base station), etc., which are not limited here.

[0139] Terminal device: A terminal device is an entity on the user side that is used to receive or transmit signals. Its behavior is mainly controlled by network devices such as gNB, and the sending and receiving signals are scheduled by network devices. A terminal device can be a device that provides voice and / or data connectivity to users, such as a handheld device with wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via the radio access network (RAN) and exchange voice and / or data with the RAN. The terminal device may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle-to-everything (V2X) terminal equipment, machine-to-machine / machine-type communications (M2M / MTC) terminal equipment, Internet of Things (IoT) terminal equipment, subscriber unit, subscriber station, mobile station, remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, or user equipment, etc. For example, it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, or computer-built-in mobile device, etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA), etc. It also includes limited devices, such as devices with low power consumption, or devices with limited storage capacity, or devices with limited computing power, etc. For example, it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), laser scanners, etc.

[0140] The embodiments of the present application are mainly applied to the 5GNR (5GNR in UnlicensedSpectrum, 5G NR-U) system working in unlicensed spectrum. Figure 1 , Figure 1 A schematic diagram of a communication system provided in an embodiment of the present application, such as Figure 1 As shown, the system includes a base station (BS) and UE1 to UE6. In the communication system, UE1 to UE6 can send uplink data to the base station, and the base station needs to receive the uplink data sent by UE1 to UE6 and give it to UE1 to UE6. In addition, UE4 to UE6 can also form a communication system. In the communication system, the BS can send downlink information to UE1, UE2, UE5, etc.; UE5 can also send downlink information to UE4 and UE6.

[0141] The present invention can also be applied to other communication systems, as long as the communication system needs to interact with channel state information and there are sending entities and receiving entities in the system for information interaction to avoid collision during channel monitoring.

[0142] See also Figure 2A , Figure 2A A schematic diagram of a signal transmission method flow chart provided in an embodiment of the present application is as follows: Figure 2A As shown, the method comprises the following steps:

[0143] 201. The terminal device performs channel monitoring and sends a first control signal to the network device when the channel is idle, wherein the first control signal is used to instruct the network device to send a first downlink shared signal.

[0144] 202. The network device sends the first downlink shared signal according to the first control signal.

[0145] The following is an explanation of 201.

[0146] For the process of network equipment calling the downlink sharing signal, please refer to Figure 2B , Figure 2B A schematic diagram of a process of calling a downlink shared signal is provided in an embodiment of the present application, such as Figure 2BAs shown, the network device first sends downlink control information (Downlink Control Information, DCI) through the Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH). The DCI may include resource allocation and other control information of the terminal device, such as control information for receiving downlink shared signals, and time-frequency resources for receiving downlink sharing. After receiving the DCI, the terminal device receives the user data sent by the network device through the Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) at the time-frequency resource position indicated by the DCI.

[0147] In the embodiment of the present application, before the network device sends user data to the terminal device, the terminal device first sends a first control signal to the network device to notify the network device to send a first downlink sharing signal. Figure 2C , Figure 2C A schematic diagram of a communication process based on terminal device channel monitoring provided in an embodiment of the present application, such as Figure 2C As shown, the terminal device first performs channel sensing to determine whether the channel is idle. If the channel is idle, the first control signal PUCCH M1 is sent through the physical uplink channel PUCCH. The PUCCH resources scheduled by sending PUCCH M1 can be called PUCCH1, and the PUCCH resources scheduled by sending other parameters or information such as Hybrid Automatic Repeat Request (HARQ) signals can be called PUCCH2. PUCCH M1 is used to prompt the receiving node (network device) of the signal whether to send data. Therefore, the first control signal can be a sending instruction, which is used to directly instruct the network device to send or not send the first downlink shared signal PDSCH M1. Or the first control signal can be some parameter information or indication information, and the network device determines whether to send PDSCH M1 based on the received parameter information or indication information.

[0148] In some cases, the terminal device needs to perform channel monitoring and send a first control signal to the network device when it determines that the channel is idle, wherein the terminal device performs channel monitoring in the beam direction determined by the first space receiving parameter, and the beam direction determined by the first space receiving parameter is the beam within the coverage range of the directional antenna.

[0149] In some cases, the PUCCH M1 sent by the terminal device may include indication information for indicating the channel usage of the terminal device. The channel usage indicates the result of the terminal device detecting according to the first space receiving parameter. The result of the detection may include channel interference value, interference source or interference type, etc. The interference value obtained by the detection is compared with the preset threshold value to determine the relationship between the interference value and the preset energy monitoring threshold ED (Energy Detection). Among them, the setting of ED can be determined according to the modulation and coding scheme (Modulation and Coding Scheme, MCS) of the first downlink shared signal to be sent, such as the level of the modulation order MCS is inversely proportional to the level of ED, that is, a relatively low modulation order MCS can correspond to a relatively high ED, wherein the correspondence between MCS and the detection threshold ED can be configured by upper layer signaling or by protocol default configuration, and the specific correspondence can refer to Table 1:

[0150] MCS ED mcs0 -26dbm mcs1 -28dbm mcs2 -30dbm mcs3 -32dbm ... ...

[0151] Alternatively, the setting of ED may also be determined based on the receiving capability (Capability) of the terminal device. For example, the receiving capability of the terminal device is inversely proportional to the level / ED value of ED, that is, the terminal device may adopt a higher ED / ED value than another terminal device with a lower receiving capability relative to it. Alternatively, the setting of ED may be determined based on the signal interference value in the indication information. For example, if the signal interference value currently detected by the terminal device is less than the interference value carried in the channel state indication (Channel State Indication, CSI) previously reported by the terminal device, the ED value may be increased.

[0152] Alternatively, the setting of ED may also be determined according to the interference source or interference type. For example, the ED threshold used for interference signals not from the cell may be higher than the ED threshold used for interference signals from other cells.

[0153] In some implementations, the comparison between the interference value and the ED can be performed in the terminal device. The terminal device first obtains the ED, and the acquisition method includes: pre-defined in the standard; or configured by the network device through upper layer control signaling, such as Radio Resource Control (RRC); or configured by the network device for the terminal device through DCI. Then, the size relationship between the interference value and the ED in the interference detection result is determined, and a sending instruction is generated according to the size relationship. If the interference value ≤ ED, the generated sending instruction is "send", otherwise the generated sending instruction is "do not send", and the network device determines whether to send the first downlink shared signal according to the received sending instruction.

[0154] In some implementations, the terminal device obtains a listening result based on a comparison between the interference value and the ED, and the listening result includes whether the channel is idle or not idle. Similarly, the method for obtaining ED can be predefined in the standard, RRC configuration or DCI configuration. If the interference value ≤ ED, the listening result is that the channel is idle; if the interference value > ED, the listening result is that the channel is not idle. The indication information included in PUCCH M1 can be the listening result. If the listening result in PUCCH M1 is that the channel is idle, it means that the network device can send PDSCH M1, otherwise it does not send PDSCH M1.

[0155] In some implementations, the comparison between the interference value and the ED may also be performed in the network device, and the result of the detection by the terminal device according to the first spatial reception parameter is used as the interference detection result, and then indication information is sent to the network device through PUCCH M1, the indication information includes the interference detection result, and the interference detection result includes the interference value. The network device compares the interference value with the ED value, and the ED in the network device may be pre-defined in the standard, or may be dynamically acquired by the network device according to the communication situation. If the network device determines that the interference value is ≤ED, PDSCH M1 is sent to the terminal device, otherwise PDSCH M1 is not sent.

[0156] The above “≤” means less than or equal to, and equal to can be included in the upper limit value and can also be included in the lower limit value, that is, the above “≤” can also be replaced with “<”, and “>” can also be replaced with “≥”.

[0157] In some embodiments, before the terminal device sends PUCCH M1, the network device sends a second control signal PDCCH M1 through PDCCH, and the second control signal can be used to indicate the resources for the terminal device to send PUCCH M1, including time domain resources, frequency domain resources, or codeword resources, etc. For example, the time-frequency resources of PUCCH M1 are indicated by indicating the signal starting point and transmission duration of PUCCH, and the transmission duration can be symbols or milliseconds; the frequency domain resource position of PUCCH M1 is indicated by PUCCH resource indication (PUCCH Resource Indication, PRI). The terminal device sends PUCCH M1 at the indicated time-frequency position. In addition, PDCCH M1 can also include a transmission configuration indication (Transmission Configuration Indicator, TCI), and the terminal device can determine the first space reception parameter according to TCI. After the terminal device determines the first space reception parameter, it performs signal interference detection (or channel listening) in the beam direction determined by the space reception parameter. After receiving PUCCH M1, if the network device determines to send the first downlink shared signal, it sends it in the beam direction determined by the first spatial reception parameter, so that the beam direction for channel sensing of the terminal device is the same as the beam direction for receiving the first downlink shared signal. In addition, the transmission configuration indication information can be configured in the upper layer signaling RRC. At this time, the network device does not need to send the transmission configuration indication in PDCCH M1 to save signaling overhead.

[0158] Specifically, the transmission configuration indication is used to indicate that there is a quasi co-location (QCL) relationship between two received signals. The QCL relationship classification is shown in Table 2:

[0159] Table 2

[0160]

[0161] When the QCL relationship in the transmission configuration indication is Type D, it is used to indicate that the two receiving signals indicated in the transmission configuration indication, such as signal A and signal B, the spatial receiving parameters when receiving signal A are the same as the spatial receiving parameters when receiving signal B. Exemplarily, signal A can be a demodulation reference signal (DMRS) in a PDCCH signal or a DMRS in a synchronization signal block (SSB), or a channel state indication reference signal (CSI-RS), and signal B can be a PDSCH signal. The terminal device determines the beam direction according to the spatial reception parameters, then the terminal device performs channel sensing in the beam direction, and the beam direction is the direction in which the terminal device receives the downlink shared signal. In this case, the terminal device performs channel sensing in a directional beam, which can be called directional LBT. In the process of directional LBT, for the downlink shared signal receiving node (terminal device), the beam direction for channel sensing or interference detection is the beam direction of the received signal, thereby reducing signal interference from other non-receiving signal directions, and effectively reducing the problem of terminal device exposed nodes.

[0162] In some implementations, the first control signal may be a periodic signal sent according to a first period. Figure 2D , Figure 2D A schematic diagram of periodic signal transmission provided in an embodiment of the present application is as follows: Figure 2D As shown, the terminal device UE1 sends the first control signal MU1 to the terminal device according to the period T1, the network device receives MU1, and determines whether to send the first downlink shared signal PDSCH M1 according to MU1. Similarly, before the terminal device sends MU1, directional LBT can be performed, that is, channel sensing is performed in the beam direction determined by the first spatial reception parameter, and then the sensing result is sent to the network device through MU1, so that the network device determines whether to send PDSCH M1 according to the sensing result; or the terminal device performs channel interference detection, and then sends the interference detection result to the network device through MU1, so that the network device determines whether to send PDSCH M1 according to the relationship between the interference value in the interference detection result and ED.

[0163] In addition, the first control signal is a signal sent according to the first period, that is, the first control signal is a periodic uplink resource, and the periodic uplink resource can be scheduled in two ways. One of the methods is called type 1 resource scheduling method: the network device configures uplink resources for the terminal device through upper-layer control signaling, such as RRC, such as the period of uplink resources, frequency domain position, codeword resources, MCS, maximum transmit power, transmission configuration indication (used to determine the first space reception parameter) and other configuration information. When the terminal device receives this configuration information, it can perform directional LBT on the corresponding resource, and then send the first control information. Another method is called type 2 resource scheduling: different from type 1 resource configuration method, type 2 resource configuration method adopts RRC+DCI resource scheduling method. After the network device configures periodic uplink resources for the terminal device, these periodic uplink resources are not effective immediately, and DCI signaling is required to activate these uplink resources. That is, after the network device receives the upper-layer control instruction, it is also necessary to receive the third control signal sent by the network device to activate the uplink resources indicated in the upper-layer control instruction. At this time, part of the signaling sent in RRC, such as MCS, is sent by the third control signal (DCI).

[0164] Furthermore, in order to reduce the signaling overhead of the network device scheduling the first downlink shared signal, the network device may also configure the resource configuration information of the first downlink shared signal associated with the first control signal to the terminal device through upper layer control signaling, such as RRC. The terminal device receives downlink data on the resources of the first downlink shared signal associated with the first control signal.

[0165] In some cases, the network device can configure periodic first control signal resources for multiple terminal devices at the same time. Figure 2E , Figure 2E Another schematic diagram of periodic signal transmission provided in an embodiment of the present application is as follows: Figure 2E As shown, the terminal device UE1 sends a first control signal MU1 to the terminal device according to a period T1, and the terminal device UE2 sends a first control signal MU2 to the terminal device according to a period T2, wherein T1 and T2 may be the same or different. The first spatial reception parameters acquired by UE1 and UE2 may be the same or different, that is, UE1 and UE2 may perform channel sensing in the same beam direction or in different beam directions.

[0166] When the first control signal is a signal sent according to the first period, the first control signal sent by the terminal device can be sent through periodic PUCCH, semi-statically scheduled PUSCH, unscheduled PUSCH, configured scheduled PUSCH, channel sounding reference signal (Sounding Reference Signal, SRS), or physical random access channel (Physical Random Access Channel, PRACH).

[0167] In an embodiment of the present application, the terminal device periodically sends a first control signal to the network device, and periodically performs channel sensing before the first control signal, and correspondingly can periodically receive the first downlink shared signal. Because the first control signal is scheduled by the upper-layer control instruction and the third control signal, this process reduces the number of times the network device needs to send scheduling signals or signaling to schedule uplink and downlink resources, thereby improving communication efficiency.

[0168] When the terminal device uses the PUCCH channel to send the first control signal, one or more of the following formats can be used: PUCCH format 0 or PUCCH format 1 (format 0 / 1), and PUCCH format 2 or PUCCH format 3 (format 2 / 3). Format 0 / 1 is a sequence, representing 1 bit of information, which can be used to send shorter signals, such as the sending instruction described above, which only indicates "send" or "do not send"; or it can be a listening result, indicating "idle" or "not idle". Format 2 / 3 is a binary code of multiple bits, which can be used to send longer signals, such as interference detection results. In addition, format 2 / 3 can also include the remaining channel occupancy time (COT), the offset of the starting point of the PDSCH signal sent by the terminal device relative to the end of the PUCCH signal, the length, MCS, and the interference threshold that the terminal device can receive, etc., to help the base station side adjust the subsequent transmission of the PDSCH data signal. While sending the first control signal, other uplink high-priority uplink control information (Uplink Control Information, UCI) information, such as a hybrid automatic repeat request acknowledgment character (Hybrid Automatic Repeat Request Acknowledge Character, HARQ-ACK), etc. may also be carried through PUCCH format 2 / 3.

[0169] In addition, in an embodiment of the present application, before format 0 / 1 is used to send the first control signal, the network device can configure the same time-frequency resources for PUCCH1 of different terminal devices using format 0 / 1 in advance through upper-layer signaling or protocol, so that when the terminal device sends the first control signal, other terminal devices with the same time-frequency resources as the first control signal stop sending signals to the network device within the t1 time period after receiving or detecting the signal. Among them, t1 can also be pre-configured by upper-layer signaling or protocol. Before format 2 / 3 is used to send the first control signal, the network device can configure the same scrambling sequence and time-frequency resources for PUCCH1 of different terminal devices using format 2 / 3 in advance through upper-layer signaling or protocol, so that when the terminal device uses format 2 / 3 to send the first control signal, other terminal devices with the same scrambling sequence as the first control signal stop sending signals to the network device within the t2 time period after receiving or detecting the signal. Among them, t2 can be carried by the first control signal.

[0170] 202 is described below. The network device sends the first downlink shared signal according to the first control signal.

[0171] According to the description of the above embodiment, after the network device receives the first control signal, it can determine whether to send or not send the first downlink shared signal according to the sending instruction therein, or determine whether to send or not send the first downlink shared signal according to the parameter information or indication information therein. That is, the network device performs a first downlink shared signal scheduling according to each first control signal. The spatial receiving parameters for the terminal device to receive the first downlink shared signal are the same as the spatial receiving parameters for the terminal device to perform channel sensing or channel interference detection, and are both first spatial receiving parameters. When the first control signal is a signal sent according to the first period, the network device may also schedule the first downlink shared signal according to the first period, or may randomly schedule the first downlink shared signal in a dynamic manner. The terminal device performs channel sensing or channel interference detection in the beam direction determined by the first spatial receiving parameters in the first period, and the first spatial receiving parameters corresponding to the signals of each period may be the same or different, so the beam direction determined by the first spatial receiving parameters may be a fixed beam direction or a variable beam direction, for example, it may be one or more beam directions in which the intensity of the signal received by the terminal device from the network device is the largest.

[0172] In some embodiments, before the network device sends the first downlink shared signal, channel sensing may also be performed to ensure that the channel meets the signal sending conditions. That is, channel sensing is performed in the beam direction determined by the second spatial receiving parameter. The beam width determined by the second spatial receiving parameter is the omnidirectional beam width. Then channel sensing in the beam direction determined by the second spatial receiving parameter is omnidirectional LBT. However, in some cases, such as when the interval between the end point of the first control signal and the starting point of the first downlink shared signal is less than the first preset value, the omnidirectional LBT may not be performed before sending the first downlink shared signal and the signal may be sent directly. The first preset value may be 16μs (microseconds), 5us, 9us, etc. Alternatively, when the signal length of the first downlink shared signal is less than or equal to the first preset length, the first preset length may be 500us. It means that the first downlink shared signal is a short signal, and its interference to the channel is low, so the signal may be sent directly without omnidirectional LBT.

[0173] Similarly, for the second control signal, omnidirectional LBT may be performed before sending, and when the signal length is less than or equal to the first preset length, the signal may be sent directly without omnidirectional LBT.

[0174] In an embodiment of the present application, before the network device schedules a downlink shared signal, the terminal device prompts the network device to send a signal, so that the direction of channel usage determined by the terminal device before receiving the downlink shared signal is the direction of receiving the downlink shared signal, effectively reducing the exposed node problem of the terminal device (receiving node).

[0175] See also Figure 3A , Figure 3A A schematic diagram of another signal transmission method flow chart provided in an embodiment of the present application, such as Figure 3A As shown, the method comprises the following steps:

[0176] 301. The network device sends a fourth control signal to the terminal device, where the fourth control signal is used to instruct the terminal device to send a first uplink shared signal;

[0177] 302. The terminal device sends the first uplink shared signal according to the fourth control signal.

[0178] The following is an explanation of 301.

[0179] In the 3GPP system, please refer to the specific process of network equipment calling uplink shared signal. Figure 3B , Figure 3B A schematic diagram of a process of calling an uplink shared signal is provided in an embodiment of the present application, such as Figure 3BAs shown, the network device first sends DCI through PDCCH. DCI may include resource allocation and other control information of the terminal device, such as control information for sending uplink shared signals and time-frequency resources for sending uplink shared signals. After receiving DCI, the terminal device sends an uplink shared signal to the network device through PUSCH at the corresponding time-frequency position.

[0180] Alternatively, the process of calling the uplink shared signal is also carried out using upper-layer control signaling, which specifically includes two methods: Method 1, the network device configures uplink resources for the terminal device through upper-layer control signaling, such as RRC, such as the frequency domain position of the uplink resources, code resources, MCS, maximum transmission power and other configuration information. When the terminal device receives this configuration information, it can send the uplink shared signal on the corresponding resources. Method 2: After the network device configures the uplink resources for the terminal device, these uplink resources are not immediately effective. These uplink resources need to be activated through DCI signaling, and then the terminal device sends the uplink shared signal on the corresponding resources. At this time, some of the signaling sent in RRC, such as MCS, is sent by DCI.

[0181] In the embodiment of the present application, before the terminal device sends the first uplink sharing signal, the network device first sends a fourth control signal to the terminal device, which is used to instruct the terminal device to send the first uplink sharing signal. Figure 3C , Figure 3C A schematic diagram of a communication process based on network device channel monitoring provided in an embodiment of the present application is shown in FIG. Figure 3C As shown, a fourth control signal PDCCH M2 is sent to the terminal device via PDCCH, and the PDCCH resource scheduled by sending PDCCH M2 can be called PDCCH schedule B. PDCCH M2 is used to prompt the node (terminal device) that receives the signal whether to send data. Therefore, PDCCH M2 can be a sending instruction, which is used to directly instruct the terminal device to send or not send the first uplink shared signal PUSCH M1. Or PDCCH M2 can be some parameter information or indication information, and the terminal device determines whether to send the first downlink shared signal based on the received parameter information or indication information.

[0182] In some cases, PDCCH M2 may include indication information for indicating the channel sensing result of the network device, the channel sensing result includes whether the channel is idle or not idle, and the process of the network device obtaining the channel sensing result is: performing channel interference detection and obtaining the interference detection result, the interference detection result may include the interference value, the signal interference source or the signal interference type, etc. The network device compares the interference value with the preset threshold value (ED). Among them, the setting of ED can be determined according to the MCS of the first uplink shared signal, and the corresponding relationship between MCS and ED can refer to the specific description in the embodiment of step 201 to step 202. Or the setting of ED can also be determined according to the receiving capability (Capability) of the network device, for example, a network device with strong receiving capability can adopt a higher ED corresponding to a network device with low receiving capability. If the interference value ≤ ED, the channel sensing result sent by the network device to the terminal device is idle, and the terminal device can send PUSCH M1 to the network device; if the interference value > ED, the channel sensing result sent by the network device to the terminal device is not idle, and the terminal device cannot send PUSCH M1 to the network device. Alternatively, the setting of ED may also be determined according to the interference source or interference type. For example, the ED threshold used for interference signals not from the cell may be higher than the ED threshold used for interference signals from other cells.

[0183] Alternatively, the network device directly generates a sending instruction of "can send" after determining that the interference value is ≤ ED according to the process of comparing the interference value with the preset threshold value (ED), and directly generates a sending instruction of "cannot send" after determining that the interference value is > ED. The terminal device determines whether to send PUSCH M1 according to the sending instruction.

[0184] In some cases, before the network device sends PDCCH M2, it can also send a fifth control signal PDCCH M3 to the terminal device, and the PDCCH resource scheduled by sending PDCCHM1 can be called PDCCH schedule A. PDCCHM3 can be used to indicate the terminal device to detect the resources of PDCCH M2. The terminal device detects PDCCH M2 on the time-frequency and code resources indicated by the resources. After receiving PDCCH M2, if the terminal device determines to send the first uplink shared signal, it sends it in the beam direction determined by the third space receiving parameter, wherein the beam direction for channel sensing by the network device is the same as the beam direction for receiving the first uplink shared signal. This process can be called directional LBT, which is the same as the description in the embodiments of steps 201 to 202. In the process of directional LBT, for the uplink shared signal receiving node (network device), the beam direction for channel sensing or interference detection is the beam direction of the received signal, which reduces signal interference from other non-receiving signal directions and effectively reduces the problem of exposed nodes of the network device.

[0185] 302 is described below: the terminal device sends the first uplink shared signal according to the fourth control signal.

[0186] According to the description of the above embodiment, after receiving the fourth control signal, the terminal device can directly determine whether to send or not send the first uplink shared signal according to the sending instruction therein, or determine whether to send or not send the first uplink shared signal according to the indication information therein.

[0187] In one case, before the terminal device sends the first uplink shared signal, omnidirectional channel listening may also be performed to ensure that the signal sending conditions are met. However, in some cases, such as when the interval between the end point of the fourth control signal and the starting point of the first uplink shared signal is less than or equal to the second preset value, the signal may be sent directly without omnidirectional LBT before sending the first uplink shared signal. The second preset value may be 16μs (microseconds), 5us or 9us. Alternatively, when the signal length of the first uplink shared signal is less than or equal to the second preset length, it indicates that the first uplink shared signal is a short signal and has a lower requirement for channel interference. Therefore, the signal may be sent directly without omnidirectional LBT, and the second preset length may be 500us.

[0188] Similarly, for the fifth control signal, the network device may perform channel sensing before sending to meet the signal sending conditions, that is, perform channel sensing according to the beam direction determined by the fourth spatial receiving parameter, wherein the beam coverage determined by the fourth spatial receiving parameter is greater than the beam coverage determined by the third spatial receiving parameter. The beam coverage determined by the fourth spatial receiving parameter may be an omnidirectional beam coverage, then channel sensing in the beam direction determined by the fourth spatial receiving parameter is omnidirectional LBT, but when its signal length is less than or equal to the first preset length, omnidirectional LBT may not be performed and the signal may be sent directly.

[0189] In an embodiment of the present application, before the network device schedules the uplink shared signal, the network device prompts the terminal device to send a signal so that the direction in which the network device performs channel monitoring before receiving the uplink shared signal is the direction in which the uplink shared signal is received, thereby effectively reducing the exposed node problem of the network device (receiving node).

[0190] Figure 4 A network device 400 provided in an embodiment of the present application can be used to perform the above Figure 2A to Figure 2E or Figure 3A to Figure 3C A signal transmission method and specific embodiments of a network device, the network device may be a network device or a chip configured in the network device. In a possible implementation, Figure 4As shown, the network device 400 includes a sending module 401 and a receiving module 402 .

[0191] The receiving module 401 is used to receive a first control signal from a terminal device, where the first control signal is used to instruct the network device to send a first downlink sharing signal;

[0192] The sending module 402 is configured to send the first downlink shared signal according to the first control signal.

[0193] Optionally, the first control signal includes indication information for indicating channel usage of the terminal device, and the channel usage indicates a result of detection performed by the terminal device according to the first space reception parameter.

[0194] Optionally, the indication information includes a channel sensing result, and the channel sensing result includes whether the channel is idle or not idle. The sending module 402 is specifically used to send the first downlink sharing signal when the channel is idle.

[0195] Optionally, the indication information includes a channel interference detection result, and the sending module 402 is specifically used to: when an interference value corresponding to the channel interference detection result is less than a preset threshold value, send the first downlink sharing signal.

[0196] Optionally, the sending module 402 is further used to: send a second control signal, where the second control signal is used to indicate the resource for the terminal device to send the first control signal.

[0197] Optionally, the first control signal is a signal sent according to a first period, the first period is an interval for sending the first control signal, and the sending module 402 is further used to: instruct the terminal device through upper-layer control signaling on resources for sending the first control signal.

[0198] Optionally, the sending module 402 is further used to: send a third control signal, and activate the resource for sending the first control signal through the third control signal.

[0199] Optionally, the device also includes a processing module 403, which is used to perform channel monitoring in the beam direction determined by the second space receiving parameter when the signal length of the second control signal or the first downlink shared signal is greater than the first preset length, and the beam width determined by the second space receiving parameter is the omnidirectional beam width.

[0200] Optionally, the processing module 403 is further used to: when the time interval between the first control signal and the first downlink shared signal is greater than a first preset value, perform channel sensing according to the beam direction determined by the second spatial reception parameter.

[0201] or,

[0202] A sending module 402, configured to send a fourth control signal to a terminal device, wherein the fourth control signal is used to instruct the terminal device to send a first uplink shared signal;

[0203] The receiving module 401 is configured to receive the first uplink shared signal sent according to the fourth control signal.

[0204] Optionally, the sending module 402 is further used to: send a fifth control signal, where the fifth control signal is used to instruct the terminal device to detect resources for the fourth control signal.

[0205] Optionally, the device further includes a processing module 403, which is used to perform channel detection using a third spatial reception parameter before sending the fourth control signal to the terminal device, where the third spatial reception parameter is a spatial reception parameter of the first uplink shared signal.

[0206] Optionally, the processing module 403 is also used to perform channel monitoring in the beam direction determined by the fourth space receiving parameter when the signal length of the second control signal is greater than the first preset length, and the beam coverage range determined by the fourth space receiving parameter is greater than the beam coverage range determined by the third space receiving parameter.

[0207] Optionally, the receiving module 401 and the sending module 402 may be interface circuits or transceivers. The receiving module 401 and the sending module 402 may be independent modules or integrated into a transceiver module (not shown), which may implement the functions of the receiving module 401 and the sending module 402.

[0208] The processing module 403 may be a chip, an encoder, an encoding circuit or other integrated circuits that can implement the method of the present application.

[0209] Since the specific methods and embodiments have been introduced above, the network device 400 is used to execute the signal transmission method corresponding to the network device. Therefore, the specific description of the signal transmission method, especially the functions of the receiving module 401 and the sending module 402, can refer to the relevant parts of the corresponding embodiments and will not be repeated here.

[0210] Optionally, the network device 400 may further include a storage module (not shown in the figure), which may be used to store data and / or signaling, and the storage module may be coupled to the processing module 403, or may be coupled to the receiving module 401 or the sending module 402. For example, the processing module 403 may be used to read the data and / or signaling in the storage module, so that the signal transmission method in the foregoing method embodiment is executed.

[0211] Figure 5A terminal device 500 provided in an embodiment of the present application can be used to perform the above Figure 2A to Figure 2E or Figure 3A to Figure 3C A signal transmission method and specific embodiment of a terminal device, wherein the terminal device may be a terminal device or a chip configured in the terminal device. In a possible implementation, Figure 5 As shown, the terminal device 500 includes a receiving module 501 , a sending module 502 , and a processing module 503 .

[0212] The processing module 503 is used to perform channel sensing. Specifically, the processing module 503 performs channel sensing according to the energy of the signal received by the receiving module 501;

[0213] A sending module 502, configured to send a first control signal to a network device when the channel is idle, wherein the first control signal is used to instruct the network device to send a first downlink sharing signal;

[0214] The receiving module 501 is configured to receive the first downlink sharing signal from a network device.

[0215] Optionally, the processing module 503 is specifically used to: perform channel sensing in a beam direction determined by the first spatial receiving parameter.

[0216] Optionally, the receiving module 501 is further used to: receive a second control signal, and determine resources for sending the first control signal according to the second control signal.

[0217] Optionally, the first control signal is a signal sent according to a first period, the first period is an interval for sending the first control signal, and the receiving module 501 is further used to determine resources for sending the first control signal through instructions of upper-layer control signaling.

[0218] Optionally, the receiving module 501 is further used to: receive a third control signal, and activate the resource for sending the first control signal through the third control signal.

[0219] or,

[0220] A receiving module 501, configured to receive a fourth control signal sent by a network device, wherein the fourth control signal is used to instruct the terminal device to send a first uplink sharing signal;

[0221] The sending module 502 is used to send a first uplink sharing signal to the network device according to the fourth control signal.

[0222] Optionally, the receiving module 501 is further used to: receive a fifth control signal, and determine a resource for detecting the fourth control signal according to the fifth control signal.

[0223] Optionally, the processing module 503 is used to perform channel sensing in a beam direction determined by a fourth spatial receiving parameter when the signal length of the first uplink shared signal is greater than a second preset length, and send the first uplink shared signal when the channel is idle.

[0224] Optionally, the processing module 503 is used to perform channel monitoring in the beam direction determined by the fourth space receiving parameter when the time interval between the fourth control signal and the first uplink shared signal is greater than a second preset value, and send the first uplink shared signal when the channel is idle.

[0225] Optionally, the receiving module 501 and the sending module 502 may be interface circuits or transceivers. The receiving module 501 and the sending module 502 may be independent modules or integrated into a transceiver module (not shown), which may implement the functions of the receiving module 501 and the sending module 502 described above.

[0226] Optionally, the processing module 503 may be a chip, an encoder, an encoding circuit or other integrated circuit that can implement the method of the present application.

[0227] Since the specific methods and embodiments have been introduced above, the terminal device 500 is used to execute the signal transmission method corresponding to the terminal device. Therefore, the specific description of the signal transmission method, including the functions of the receiving module 501, the sending module 502 and the processing module 503, can refer to the relevant parts of the corresponding embodiments and will not be repeated here.

[0228] Optionally, the terminal device 500 may further include a storage module (not shown in the figure), which may be used to store data and / or signaling, and the storage module may be coupled to the processing module 503, or may be coupled to the receiving module 501 or the sending module 502. For example, the processing module 503 may be used to read the data and / or signaling in the storage module, so that the signal transmission method in the foregoing method embodiment is executed.

[0229] like Figure 6 As shown, Figure 6 FIG. 1 shows a schematic diagram of the hardware structure of a communication device in an embodiment of the present application. The structure of the transmitting end device and the receiving end device can refer to Figure 6 The communication device 600 includes: a processor 111 and a transceiver 112, wherein the processor 111 and the transceiver 112 are electrically coupled;

[0230] The processor 111 is configured to execute part or all of the computer program instructions in the memory. When the part or all of the computer program instructions are executed, the device executes the method described in any one of the above embodiments.

[0231] The transceiver 112 is used to communicate with other devices; for example, to receive a first uplink control signal from a terminal device, wherein the first uplink control signal is used to instruct a network device to send a first downlink shared signal; and to send the first downlink shared signal according to the first uplink control signal.

[0232] Optionally, a memory 113 is also included for storing computer program instructions. Optionally, the memory 113 (Memory#1) is located inside the device, the memory 113 (Memory#2) is integrated with the processor 111, or the memory 113 (Memory#3) is located outside the device.

[0233] It should be understood that Figure 6 The communication device 600 shown may be a chip or a circuit. For example, a chip or a circuit may be provided in a terminal device or a communication device. The transceiver 112 may also be a communication interface. The transceiver includes a receiver and a transmitter. Furthermore, the communication device 600 may also include a bus system.

[0234] Among them, the processor 111, the memory 113, and the transceiver 112 are connected through a bus system, and the processor 111 is used to execute the instructions stored in the memory 113 to control the transceiver to receive signals and send signals, and complete the steps of the first device or the second device in the implementation method involved in this application. The memory 113 can be integrated in the processor 111, or it can be set separately from the processor 111.

[0235] As an implementation method, the function of the transceiver 112 can be considered to be implemented by a transceiver circuit or a dedicated transceiver chip. The processor 111 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general chip. The processor can be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and an NP. The processor can further include a hardware chip or other general processors. The above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) and other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. or any combination thereof. The general processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0236] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. 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), which is used as an external cache. By way of example and not limitation, many forms of RAM 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 link dynamic random access memory (SLDRAM), and direct memory bus random access memory (DR RAM). It should be noted that the memory described in this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0237] like Figure 7 As shown, Figure 7 A communication system 900 provided in an embodiment of the present application includes a terminal device 901 and a network device 902, wherein the terminal device 901 may include Figure 5 The terminal device 500 and the network device 902 may include: Figure 4 The hardware structures corresponding to the network device 400, the terminal device 901 and the network device 902 can be as follows: Figure 6 The communication device 600. The communication system 900 can be used to execute the above-mentioned communication method and specific embodiments applicable to the above-mentioned terminal device and network device. For the specific execution process, see Figure 2A to Figure 2E or Figure 3A to Figure 3C Description content.

[0238] An embodiment of the present application provides a computer storage medium storing a computer program, wherein the computer program includes a method for executing the method corresponding to the network device in the above embodiment.

[0239] An embodiment of the present application provides a computer storage medium storing a computer program, wherein the computer program includes a method for executing the method corresponding to the network device in the above embodiment.

[0240] An embodiment of the present application provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute the method in the above embodiment corresponding to the terminal device.

[0241] An embodiment of the present application provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute the method in the above embodiment corresponding to the terminal device.

[0242] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0243] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and implementation constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0244] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0245] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0246] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0247] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0248] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0249] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A signal transmission method, characterized in that: Applied to a network device, the method comprises: Receiving a first control signal from a terminal device, where the first control signal is used by the network device to determine whether to send a first downlink sharing signal; Sending the first downlink shared signal according to the first control signal; The first control signal includes indication information for indicating the channel usage of the terminal device, and the channel usage indicates the result of detection performed by the terminal device according to the first space reception parameter; The indication information includes a channel sensing result, the channel sensing result includes whether the channel is idle or not idle, and sending the first downlink shared signal according to the first control signal includes: When the channel is idle, the first downlink shared signal is sent; or The indication information includes a channel interference detection result, and sending the first downlink shared signal according to the first control signal includes: When the interference value corresponding to the channel interference detection result is less than a preset threshold value, the first downlink shared signal is sent.

2. The method according to any one of claim 1, characterized in that: Before receiving the first control signal from the terminal device, the method further includes: Send a second control signal, where the second control signal is used to indicate the resource for the terminal device to send the first control signal.

3. The method according to claim 2, characterized in that The second control signal also includes a transmission configuration indication, and the transmission configuration indication is used by the terminal device to determine a first spatial reception parameter, and the first spatial reception parameter is consistent with the spatial reception parameter for sending the first downlink shared signal.

4. The method according to any one of claim 1, characterized in that: The first control signal is a signal sent according to a first period, the first period is a sending interval of the first control signal, and before receiving the first control signal from the terminal device, the method further includes: The resource for sending the first control signal by the terminal device is indicated through upper layer control signaling.

5. The method according to claim 4, characterized in that The resource for instructing the terminal device to send the first control signal through upper layer control signaling also includes: A third control signal is sent, and the resource for sending the first control signal is activated by the third control signal.

6. The method according to claim 5, characterized in that The upper layer control signaling or the third control signal also includes a transmission configuration indication, and the transmission configuration indication is used by the terminal device to determine a first space reception parameter, and the first space reception parameter is consistent with the space reception parameter for sending the first downlink shared signal.

7. The method according to claim 6, characterized in that When the first control signal is a signal sent according to a first period, the first space receiving parameters corresponding to the signal of each period are different.

8. The method according to claim 4, characterized in that The first control signal is sent via a periodic physical uplink control channel PUCCH, a semi-statically scheduled physical uplink shared channel PUSCH, an unscheduled PUSCH, a configured scheduled PUSCH, a channel sounding reference signal SRS, or a physical random access channel PRACH.

9. The method according to claim 2, characterized in that: When the signal length of the second control signal or the first downlink shared signal is greater than the first preset length, channel sensing is performed in the beam direction determined by the second spatial receiving parameter, and the beam width determined by the second spatial receiving parameter is the omnidirectional beam width.

10. The method according to any one of claims 1 to 9, characterized in that: When the time interval between the first control signal and the first downlink shared signal is greater than a first preset value, channel sensing is performed according to a beam direction determined by a second spatial reception parameter.

11. A signal transmission method, characterized in that: Applied to a terminal device, the method comprises: Perform channel monitoring, and send a first control signal to the network device when the channel is idle, wherein the first control signal is used to instruct the network device to send a first downlink shared signal; receiving the first downlink sharing signal from the network device, The first control signal includes indication information for indicating channel usage of the terminal device, where the channel usage indicates a result of detection performed by the terminal device according to the first spatial reception parameter; The indication information includes a channel sensing result, the channel sensing result includes whether the channel is idle or not idle, and the first control signal is used to instruct the network device to send a first downlink sharing signal, including: When the channel is idle, the first downlink shared signal is sent; or The indication information includes a channel interference detection result, and the first control signal is used to instruct the network device to send a first downlink shared signal, including: When the interference value corresponding to the channel interference detection result is less than a preset threshold value, the first downlink shared signal is sent.

12. The method according to claim 11, characterized in that The channel monitoring comprises: Channel sensing is performed in a beam direction determined by the first spatial reception parameter.

13. The method according to claim 11, characterized in that Before performing channel monitoring and sending a first control signal to the network device when the channel is idle, the method further includes: A second control signal is received, and a resource for sending the first control signal is determined according to the second control signal.

14. The method according to claim 13, characterized in that The second control signal also includes a transmission configuration indication, where the transmission configuration indication is used to determine a first space reception parameter, where the first space reception parameter is consistent with a space reception parameter for receiving the first downlink shared signal.

15. The method according to claim 11, characterized in that The first control signal is a signal sent according to a first period, the first period is a sending interval of the first control signal, and before performing channel monitoring and sending the first control signal to the network device when the channel is idle, the method further includes: The resource for sending the first control signal is determined through an indication of upper layer control signaling.

16. The method according to claim 15, characterized in that The determining, through the indication of the upper layer control signaling, the resource for sending the first control signal further includes: A third control signal is received, and a resource for sending the first control signal is activated through the third control signal.

17. The method according to claim 16, characterized in that The upper layer control signaling or the third control signal also includes a transmission configuration indication, and the transmission configuration indication is used to determine a first space reception parameter, and the first space reception parameter is consistent with a space reception parameter for receiving the first downlink shared signal.

18. The method according to claim 17, characterized in that When the first control signal is a signal sent according to a first period, the first space receiving parameters corresponding to the signal of each period are different.

19. The method according to any one of claims 13 to 18, characterized in that: The format of the first control signal is format 0 / 1.

20. The method according to any one of claims 13 to 18, characterized in that: The format of the first control signal is format 2 / 3, and the format 2 / 3 is scrambled by a first scrambling code, and the first scrambling code is used for another terminal device to demodulate the first control signal.

21. A network device, characterized in that: The network equipment includes: A receiving module, configured to receive a first control signal from a terminal device, wherein the first control signal is used by a network device to determine whether to send a first downlink sharing signal; A sending module, configured to send the first downlink shared signal according to the first control signal; The first control signal includes indication information for indicating the channel usage of the terminal device, and the channel usage indicates the result of detection performed by the terminal device according to the first space reception parameter; The indication information includes a channel sensing result, the channel sensing result includes whether the channel is idle or not idle, and sending the first downlink shared signal according to the first control signal includes: When the channel is idle, the first downlink shared signal is sent; or The indication information includes a channel interference detection result, and sending the first downlink shared signal according to the first control signal includes: When the interference value corresponding to the channel interference detection result is less than a preset threshold value, the first downlink shared signal is sent.

22. A terminal device, characterized in that: The device comprises: A processing module, used for channel monitoring; A sending module, used for sending a first control signal to the network device when the channel is idle, wherein the first control signal is used for instructing the network device to send a first downlink sharing signal; A receiving module, configured to receive the first downlink sharing signal from a network device; The first control signal includes indication information for indicating channel usage of the terminal device, where the channel usage indicates a result of detection performed by the terminal device according to the first spatial reception parameter; The indication information includes a channel sensing result, the channel sensing result includes whether the channel is idle or not idle, and the first control signal is used to instruct the network device to send a first downlink sharing signal, including: When the channel is idle, the first downlink shared signal is sent; or The indication information includes a channel interference detection result, and the first control signal is used to instruct the network device to send a first downlink shared signal, including: When the interference value corresponding to the channel interference detection result is less than a preset threshold value, the first downlink shared signal is sent.

23. A communication device, characterized in that: The apparatus comprises at least one processor coupled to at least one memory: The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the apparatus executes the method according to any one of claims 1 to 10.

24. A communication device, characterized in that: The apparatus comprises at least one processor coupled to at least one memory: The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the apparatus performs the method according to any one of claims 11 to 20.

25. A readable storage medium, characterized in that: Used to store instructions, when the instructions are executed, the method as claimed in any one of claims 1-10 is implemented, or the method as claimed in any one of claims 11-20 is implemented.

26. A computer program product. When a computer reads and executes the computer program product, the computer is caused to execute the method according to any one of claims 1 to 10, or the computer is caused to execute the method according to any one of claims 11 to 20.

27. A communication system comprising the network device as claimed in claim 21 and the terminal device as claimed in claim 22.

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