Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The communication method comprises: on a first time domain resource and a first frequency domain resource, a second network device receives a first signal transmitted by a first terminal device, the first signal being used for indicating that the transmission or reception of a second signal between a first network device and the first terminal device is present on a second time domain resource and a second frequency domain resource; and on the basis of the first signal, the second network device determines signal transmission or reception between the second network device and a second terminal device on the second time domain resource and the second frequency domain resource. By means of the method in embodiments of the present application, when it is necessary to transmit or receive a second signal, a first signal is transmitted first, so that the network devices or the terminal devices with interference can identify a data transmission requirement on the second signal, thereby achieving interference avoidance and reducing communication interference.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on January 31, 2024, with application number 202410142595.8 and invention name “Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and more particularly, to a communication method and a communication device. Background Art

[0003] Currently, aerial communication services are gaining widespread adoption. For example, drones provide aerial logistics services, while low-altitude unmanned aircraft can provide aerial commuting services in cities, alleviating congestion. Downlink communications for aerial communication services require high spectrum efficiency to meet the entertainment and communication needs of aerial devices. Uplink communications also require high throughput to support real-time control backhaul for aerial devices.

[0004] However, compared to traditional terrestrial communications, signal propagation in airborne communications is mainly based on line-of-sight propagation (LOS propagation). Line-of-sight propagation is a propagation method in which wireless signals propagate in a straight line between the transmitter and the receiver without obstruction, or in other words, it is a propagation method in which wireless signals are directly transmitted from the transmitting point to the receiving point within a distance (i.e., within line of sight) where the transmitting antenna and the receiving antenna can "see" each other (for example, there are no obstructions). Compared with traditional terrestrial communications, the attenuation of wireless signals in line-of-sight communications is smaller, resulting in greater signal strength and a wider signal coverage range. Therefore, in the above-mentioned airborne communication scenario, more interference is caused to the cell serving the airborne terminal device. Inter-cell interference is also enhanced due to line-of-sight transmission. Therefore, in the signal transmission scenario of airborne communications, the uplink and downlink transmission of the airborne device will be subject to strong inter-cell interference, thereby affecting the transmission performance of the airborne device.

[0005] Summary of the Invention

[0006] The present application provides a communication method and a communication device for reducing communication interference.

[0007] In the first aspect, a communication method is provided, which can be executed by a second network device, or by a module (such as a chip or circuit) in the second network device, or by a logical node, logical module or software that can implement all or part of the functions of the second network device. This application does not limit this.

[0008] The method includes: a second network device receives a first signal sent by a first terminal device on a first time domain resource and a first frequency domain resource, the first signal being used to indicate that there is transmission or reception of a second signal between the first network device and the first terminal device on a second time domain resource and a second frequency domain resource; and based on the first signal, determining the transmission or reception of a signal between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0009] Optionally, no communication connection is established between the first terminal device and the second network device. In other words, the second network device may receive the first signal sent by the first terminal device through blind detection.

[0010] Therefore, specifically, in the communication method shown in the first aspect, after receiving the first signal, the second network device determines or adjusts the sending or receiving of signals between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources indicated in the first signal, based on the sending or receiving of the second signal between the first network device and the first terminal device on the second time domain resources and the second frequency domain resources, so as to avoid interference with the sending or receiving of the second signal caused by the signal between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources, thereby reducing interference in signal transmission between cells.

[0011] It should be understood that the signal between the second network device and the second terminal device may be any signal, such as a dynamically scheduled signal, or may be a signal that is periodically sent or received.

[0012] Optionally, the first signal can be determined based on the first configuration information and / or resource configuration information. Specifically, the first configuration information may include cell configuration information and / or location information of the first cell, and the resource configuration information is used to indicate the first resource (such as indicating the time domain resource and the frequency domain resource). The first resource can be used by the first terminal device to send the first signal, and the first resource can also be used by the second network device to receive the first signal.

[0013] In combination with the first aspect, in some implementations of the first aspect, the first signal is a reference signal.

[0014] Exemplarily, the cell configuration information of the first cell may include the physical cell identifier of the first cell or sequence information of the first signal indicated by the first cell. In this case, the first signal may be a cell-level reference signal generated based on the cell configuration information of the first cell. For example, the first signal is a sequence generated based on a root index (such as a Zadoff Chu sequence), and the root index may be equal to the value of the physical cell identifier of the first cell, or the root index may be equal to the sequence value of the first signal indicated by the first cell. For example, the first signal is scrambled by a first scrambling code, and the first scrambling code is generated based on the physical cell identifier of the first cell. The location information of the first cell may include global positioning system (GPS) information and other information used to indicate the area or location of the first cell. In this case, the first signal may be a regional reference signal generated based on the location information.

[0015] Optionally, the second signal may be a data signal, such as a physical downlink shared channel (PDSCH) signal or a physical uplink shared channel (PUSCH) signal, or a control signal, such as a physical downlink control channel (PDCCH), or a reference signal, such as a positioning reference signal (positionreferencesignal).

[0016] Through the above method, when there is a need to send or receive a second signal between the first terminal device and the first network device, the first terminal device can first send the first signal, so that the network devices and terminal devices of other cells can identify the need to send or receive the second signal based on the first signal, adjust the signal sending or receiving, achieve interference avoidance, and ensure that the data transmission of the second signal is free from interference.

[0017] In addition, the second network device may receive the first signal from the air device, that is, send and receive signals through the air interface, which has a shorter delay than the information interaction between sites.

[0018] In combination with the first aspect, in some implementations of the first aspect, the frequency range of the first frequency domain resources includes the frequency range of the second frequency domain resources.

[0019] It should be understood that the frequency range of the second frequency domain resources may be the same as the frequency range of the first frequency domain resources, or may be a part of the frequency range of the first frequency domain resources.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the first frequency domain resources include M first frequency domain resource grids, and the second frequency domain resources include N first frequency domain resource grids among the M first frequency domain resource grids, where N is less than or equal to M.

[0021] Optionally, the above-mentioned M first frequency domain resource grids can be included in K first frequency domain resource grids, and the frequency domain resources included in the K first frequency domain resource grids can be all or part of the frequency domain resources of the first cell, where M is a positive integer less than or equal to K.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the first frequency domain resource grid is a detection granularity of the first signal, and the first frequency domain resource grid is a scheduling granularity of the second signal.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the first frequency domain resources include M first frequency domain resource grids, the second frequency domain resources include L second frequency domain resource grids, the first frequency domain resource grid is the detection granularity of the first signal, and the second frequency domain resource grid is the scheduling granularity of the second signal.

[0024] With reference to the first aspect, in certain implementations of the first aspect, the first frequency domain resource grid and the second frequency domain resource grid have different sizes.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the first frequency domain resource grid and the second frequency domain resource grid have different sizes, and the second frequency domain resource grid can be further divided based on the first frequency domain resource grid, or in other words, each of the M first frequency domain resource grids includes multiple second frequency domain resource grids.

[0026] In combination with the first aspect, in certain implementations of the first aspect, different types of first signals carried on one first frequency domain resource grid correspond to different numbers of second frequency domain resource grids.

[0027] It should be understood that a first frequency domain resource grid can correspond to multiple types of first signals, where the multiple types of first signals are respectively used to indicate the transmission or reception of the second signal on different numbers of second frequency domain resource grids. The second network device determines the frequency range of the second frequency domain resources or which second frequency domain resource grids the second frequency domain resources include based on the type of the first signal.

[0028] In combination with the first aspect, in certain implementations of the first aspect, the second network device determines the sending or receiving of signals between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources, specifically by sending first indication information, which is used to indicate stopping or canceling the sending or receiving of signals of the third signal between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

[0029] In this manner, by stopping or canceling the sending of the third signal, interference of the third signal between the second network device and the second terminal device with the second signal between the first network device and the first terminal device is avoided.

[0030] In combination with the first aspect, in certain implementations of the first aspect, determining the sending or receiving of signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: sending second indication information, which is used to indicate adjustment of the spatial domain transmission configuration of the third signal between the second network device and the second terminal device on the second frequency domain resource, and the spatial domain transmission configuration includes at least one of the precoding matrix, spatial domain filter or beam of the third signal.

[0031] In this manner, by adjusting the spatial configuration, the interference of the third signal between the second network device and the second terminal device on the second signal between the first network device and the first terminal device can be suppressed.

[0032] With reference to the first aspect, in certain implementations of the first aspect, the third signal may be a periodically transmitted or received signal. For example, if the third signal is supposed to be periodically transmitted or received on the second time domain resource and the second frequency domain resource, the second network device and the second terminal device may determine not to transmit or receive the third signal, or adjust the spatial domain transmission configuration of the third signal.

[0033] In combination with the first aspect, in certain implementations of the first aspect, determining the sending or receiving of signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: determining that no signal sending or receiving is performed between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0034] Furthermore, it is possible to completely avoid the transmission or reception of signals that may interfere with the second signal between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

[0035] In combination with the first aspect, in some implementations of the first aspect, the second time domain resource is located after the first time domain resource.

[0036] In combination with the first aspect, in certain implementations of the first aspect, the end time of the first time domain resource and the start time of the second time domain resource are separated by J time units, where J is a positive integer.

[0037] In combination with the first aspect, in some implementations of the first aspect, the second time domain resource is continuous with the first time domain resource.

[0038] In combination with the first aspect, in some implementations of the first aspect, the second time domain resource may be a scheduling time period for sending or receiving the first signal once.

[0039] In combination with the first aspect, in certain implementations of the first aspect, the first signal is a PDSCH signal, and the scheduling time domain resources of the PDSCH signal are L to L+K symbols in the first time slot, then the second time domain resources are L to L+K symbols in the first time slot.

[0040] Optionally, the second time domain resource may be a predefined or preconfigured time window, within which the first signal may be sent or received once or multiple times.

[0041] In combination with the first aspect, in certain implementations of the first aspect, the first time domain resource and the second time domain resource are included in a first time unit; or, the first time domain resource is included in a second time unit, and the second time domain resource includes multiple time units.

[0042] Optionally, the one time unit may further include a third time domain resource, which is located before the first time domain resource and is a time period for the first network device to send third indication information or the first terminal device to receive third indication information. The third indication information may be first information such as DCI for scheduling the sending or receiving of the second signal, or may be carried in the first information.

[0043] Exemplarily, the first time domain resource may be included in the second time unit, the second time domain resource may include one or more time units, and the one or more time units may include the second time unit.

[0044] On the second aspect, a communication method is provided, which can be executed by a first terminal device, or by a module (such as a chip or circuit) in the first terminal device, or by a logical node, logical module or software that can implement all or part of the functions of the first terminal device. This application does not limit this.

[0045] The method includes: a first terminal device sends a first signal on a first time domain resource and a first frequency domain resource, and the first signal is used to indicate that a second signal is sent or received between a first network device and the first terminal device on a second time domain resource and a second frequency domain resource; and the first terminal device sends or receives the second signal between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource.

[0046] The first terminal device can be an aerial terminal drone, a satellite, etc., or a terminal device on an aerial device.

[0047] The first terminal device can interact with the second network device through the air interface to perform a first signal, so that the second network device and the second terminal device are informed of the existence of sending or receiving the second signal. Compared with the information interaction through the backhaul link (such as the information interaction between the network device and another network device through the backhaul link), the delay is shorter.

[0048] Through the above method, when the first terminal device has a need to send or receive a second signal, the first signal can be sent first to inform network devices and terminal devices in other cells to avoid interference, thereby ensuring that the data transmission of the second signal is free from interference.

[0049] Optionally, the first terminal device that sends the first signal and the communication device that sends or receives the second signal may be the same or different. For example, the first terminal device determines that there is sending or receiving of the second signal between another terminal device and the network device on the second time domain resources and the second frequency domain resources, and then sends the first signal on its behalf.

[0050] In combination with the second aspect, in some implementations of the second aspect, the first signal is a reference signal.

[0051] The specific scheme description of the first signal and the second signal can refer to the first aspect and will not be repeated here.

[0052] In combination with the second aspect, in certain implementations of the second aspect, the frequency range of the first frequency domain resources includes the frequency range of the second frequency domain resources.

[0053] In combination with the second aspect, in certain implementations of the second aspect, the first frequency domain resources include M first frequency domain resource grids, and the second frequency domain resources include N first frequency domain resource grids among the M first frequency domain resource grids, where N is less than or equal to M.

[0054] In combination with the second aspect, in certain implementations of the second aspect, the first frequency domain resource grid is a transmission granularity of the first signal, and the first frequency domain resource grid is a scheduling granularity of the second signal.

[0055] It should be understood that for the first terminal device, the first frequency domain resource grid is used as the transmission granularity of the first signal. In other words, the first terminal device uses one first frequency domain resource grid as the granularity and sends the first signal on the first frequency domain resources (i.e., the frequency domain resources included in M ​​first frequency domain resource grids).

[0056] Optionally, the first frequency domain resource grid is a generation granularity of the first signal. In other words, the first signal is a set of M signals generated by the first terminal device on M first frequency domain resource grids with one first frequency domain resource grid as the granularity.

[0057] It should be understood that the first terminal device can be informed that the second network device detects the first signal with the first frequency domain grid as the granularity, then the first terminal device can also send the first signal on the first time domain resource and the first frequency domain resource with the first frequency domain resource grid as the granularity; at the same time, the first network device serving the first cell schedules the first terminal device to send or receive the second signal on the second time domain resource and the second frequency domain resource with the second frequency domain resource grid as the scheduling granularity; the second network device detects the first signal on the first time domain resource and the first transmission bandwidth with the first frequency domain resource grid as the detection granularity, and the second network device detects the first signal on the first time domain resource and the first frequency domain resource, then the second network device knows that there is sending or receiving of the second signal between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource.

[0058] In combination with the second aspect, in certain implementations of the second aspect, the first frequency domain resources include M first frequency domain resource grids, the second frequency domain resources include L second frequency domain resource grids, the first frequency domain resource grid is the generation granularity of the first signal, and the second frequency domain resource grid is the scheduling granularity of the second signal.

[0059] It should be understood that the first terminal device can know that the second network device detects the first signal with the first frequency domain grid as the granularity, then the first terminal device can also send the first signal on the first time domain resource and the first frequency domain resource with the first frequency domain resource grid as the granularity; at the same time, the first network device uses the second frequency domain resource grid as the scheduling granularity to schedule the first terminal device to send or receive the second signal on the second time domain resource and the second frequency domain resource; the second network device uses the first frequency domain resource grid as the detection granularity to detect the first signal on the first time domain resource and the first transmission bandwidth respectively. The second network device detects the first signal on the first time domain resource and the first frequency domain resource, then the second network device knows that there is sending or receiving of the second signal between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource.

[0060] In combination with the second aspect, in certain implementations of the second aspect, each of the M first frequency domain resource grids includes multiple second frequency domain resource grids.

[0061] In combination with the second aspect, in certain implementations of the second aspect, different types of first signals carried on one first frequency domain resource grid correspond to different numbers of second frequency domain resource grids.

[0062] The specific solution description of the first frequency domain resource grid and the second frequency domain resource grid can refer to the first aspect and will not be repeated here.

[0063] In combination with the second aspect, in certain implementations of the second aspect, the end time of the first time domain resource and the start time of the second time domain resource are separated by J time units, where J is a positive integer.

[0064] In combination with the second aspect, in certain implementations of the second aspect, the first time domain resource and the second time domain resource are included in a first time unit; or, the first time domain resource is included in a second time unit, and the second time domain resource includes multiple time units.

[0065] The specific solution description of the first time domain resources and the second time domain resources can refer to the first aspect and will not be repeated here.

[0066] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: receiving third indication information sent by the first network device in a third time domain resource, the third indication information being used to instruct the first terminal device to send the first signal on the first time domain resource and the first frequency domain resource, and the third time domain resource being located before the first time domain resource.

[0067] In combination with the second aspect, in certain implementations of the second aspect, the third indication information is carried in the first information, and the first information is used to schedule the second signal; or, the third indication information is also used to schedule the second signal.

[0068] Optionally, the third indication information may be the first information used to schedule the second signal, such as downlink control information (DCI), or may be one or more bits carried in the first information (such as carried in DCI), and the first information is used to schedule the first signal, that is, the first information can be used to schedule the first network device to send or receive the second signal. Specifically, for example, after receiving the first information, the first terminal device may default to sending the first signal first, and then send or receive the second signal. Therefore, in addition to scheduling the second signal, the first information also has the function of indicating the sending of the first signal. For another example, the third indication information may be a trigger for the first terminal device to send the first signal on the first time domain resource and the first frequency domain resource, that is, after receiving the third indication information, the first terminal device immediately sends the first signal at the end time of the third indication information. This application does not limit the specific content of the third indication information.

[0069] In combination with the second aspect, in certain implementations of the second aspect, within the second time domain resource, the second frequency domain resource is a frequency domain resource in which the first terminal device does not expect to receive signals from network devices other than the first network device; or, within the second time domain resource, the first terminal device does not expect to receive signals from network devices other than the first network device on the second frequency domain resource.

[0070] Some possible implementation methods and beneficial effects of the second aspect can be referred to the first aspect and will not be repeated here.

[0071] According to a third aspect, a communication method is provided, which includes: a first network device sends third indication information to a first terminal device, the third indication information being used to indicate that the first terminal device sends a first signal on a first time domain resource and a first frequency domain resource, and the first signal being used to indicate that there is sending or receiving of a second signal between the first network device and the first terminal device on a second time domain resource and a second frequency domain resource; the first terminal device sends the first signal on the first time domain resource and the first frequency domain resource according to the third indication information; the second network device receives the first signal sent by the first terminal device on the first time domain resource and the first frequency domain resource, and determines, based on the first signal, the sending or reception of signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0072] In combination with the third aspect, in certain implementations of the third aspect, the first network device sending the third indication information to the first terminal device includes: the first network device sending the third indication information to the first terminal device in a third time domain resource, and the third time domain resource is located before the first time domain resource.

[0073] In combination with the third aspect, in certain implementations of the third aspect, the third indication information is carried by the first information, and the first information is used to schedule the second signal; or, the third indication information is also used to schedule the second signal.

[0074] In combination with the third aspect, in certain implementations of the third aspect, in the second time domain resource, the second frequency domain resource is a frequency domain resource in which the first terminal device does not expect to receive signals from network devices other than the first network device; or, in the second time domain resource, the first terminal device does not expect to receive signals from network devices other than the first network device on the second frequency domain resource.

[0075] In combination with the third aspect, in certain implementations of the third aspect, the second network device determines the sending or receiving of signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource as follows: the second network device sends a first indication message, and the first indication message is used to indicate the stopping or cancellation of the sending or receiving of the third signal between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0076] In combination with the third aspect, in certain implementations of the third aspect, the second network device determines the sending or receiving of signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource as follows: the second network device sends second indication information, and the second indication information is used to indicate the adjustment of the spatial domain transmission configuration of the third signal between the second network device and the second terminal device on the second frequency domain resource, and the spatial domain transmission configuration includes at least one of the precoding matrix, spatial domain filter or beam of the third signal.

[0077] In combination with the third aspect, in certain implementations of the third aspect, the second network device determines that the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: the second network device determines that the signal transmission or reception between the second network device and the second terminal device is not performed on the second time domain resource and the second frequency domain resource.

[0078] The specific scheme of the method described in the third aspect can be found in the description of the first and second aspects, and will not be repeated here.

[0079] In a fourth aspect, a communication device is provided, which includes: a transceiver unit for receiving a first signal sent by a first terminal device on a first time domain resource and a first frequency domain resource, the first signal being used to indicate the presence of sending or receiving a second signal between a first network device and a first terminal device on a second time domain resource and a second frequency domain resource; and a processing unit for determining, based on the first signal, the sending or receiving of a signal between a second network device and a second terminal device on the second time domain resource and the second frequency domain resource.

[0080] In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver unit is specifically used to: send a first indication message, which is used to indicate stopping or canceling the sending or receiving of the third signal between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0081] In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver unit is specifically used to: send second indication information, where the second indication information is used to indicate adjustment of the spatial transmission configuration of the third signal between the second network device and the second terminal device on the second frequency domain resource, and the spatial transmission configuration includes at least one of the precoding matrix, spatial filter or beam of the third signal.

[0082] In combination with the fourth aspect, in certain implementations of the fourth aspect, the processing unit is specifically used to: determine not to send or receive signals between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

[0083] The explanation and beneficial effects of the communication device provided in the fourth aspect can refer to the communication method shown in the first aspect and will not be repeated here.

[0084] In a fifth aspect, a communication device is provided, which includes: a transceiver unit for sending a first signal on a first time domain resource and a first frequency domain resource, wherein the first signal is used to indicate the sending or receiving of a second signal between a first network device and a first terminal device on a second time domain resource and a second frequency domain resource, and to send or receive the second signal on the second time domain resource and the second frequency domain resource.

[0085] In combination with the fifth aspect, in some implementations of the fifth aspect, the first signal is a reference signal.

[0086] In combination with the fifth aspect, in certain implementations of the fifth aspect, the frequency range of the first frequency domain resources includes the frequency range of the second frequency domain resources.

[0087] In combination with the fifth aspect, in certain implementations of the fifth aspect, the transceiver unit is also used to: receive third indication information sent by the first network device in a third time domain resource, the third indication information being used to instruct the first terminal device to send the first signal on the first time domain resource and the first frequency domain resource, and the third time domain resource being located before the first time domain resource.

[0088] In combination with the fifth aspect, in certain implementations of the fifth aspect, within the second time domain resource, the second frequency domain resource is a frequency domain resource in which the first terminal device does not expect to receive signals from network devices other than the first network device; or, within the second time domain resource, the first terminal device does not expect to receive signals from network devices other than the first network device on the second frequency domain resource.

[0089] The explanation and beneficial effects of the communication device-related contents provided in the fifth aspect can refer to the communication method shown in the second aspect and will not be repeated here.

[0090] In a sixth aspect, a communication system is provided, which includes a first network device, a first terminal device and a second network device, the first network device sends a third indication information to the first terminal device, the third indication information is used to instruct the first terminal device to send a first signal on a first time domain resource and a first frequency domain resource, and the first signal is used to indicate that there is a sending or receiving of a second signal between the first network device and the first terminal device on a second time domain resource and a second frequency domain resource; the terminal device sends the first signal on the first time domain resource and the first frequency domain resource according to the third indication information; the second network device receives the first signal on the first time domain resource and the first frequency domain resource, and determines the sending or receiving of signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource according to the first signal.

[0091] In combination with the sixth aspect, in certain implementations of the sixth aspect, the first network device sending the third indication information to the first terminal device includes: the first network device sending the third indication information to the first terminal device in a third time domain resource, and the third time domain resource is located before the first time domain resource.

[0092] In combination with the sixth aspect, in certain implementations of the sixth aspect, the third indication information is carried by the first information, and the first information is used to schedule the second signal; or, the third indication information is also used to schedule the second signal.

[0093] In combination with the sixth aspect, in certain implementations of the sixth aspect, in the second time domain resource, the second frequency domain resource is a frequency domain resource in which the terminal device does not expect to receive signals from network devices other than the first network device; or, in the second time domain resource, the terminal device does not expect to receive signals from network devices other than the first network device on the second frequency domain resource.

[0094] In combination with the sixth aspect, in certain implementations of the sixth aspect, the second network device determines the signal sending or receiving between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource specifically as follows: the second network device sends a first indication information, and the first indication information is used to indicate the stop or cancellation of the signal sending or receiving of the third signal between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0095] In combination with the sixth aspect, in certain implementations of the sixth aspect, the second network device determines the sending or receiving of signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource as follows: the second network device sends second indication information, and the second indication information is used to indicate adjustment of the spatial domain transmission configuration of the third signal between the second network device and the second terminal device on the second frequency domain resource, and the spatial domain transmission configuration includes at least one of the precoding matrix, spatial domain filter or beam of the third signal.

[0096] In combination with the sixth aspect, in certain implementations of the sixth aspect, the second network device determines that the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: the second network device determines that the signal transmission or reception between the second network device and the second terminal device is not performed on the second time domain resource and the second frequency domain resource.

[0097] The explanation and beneficial effects of the communication system-related contents provided in the sixth aspect can refer to the communication method shown in the third aspect and will not be repeated here.

[0098] In a seventh aspect, a communication device is provided, comprising a processor, wherein the processor is configured to enable the communication device to execute the first aspect and any possible method of the first aspect by executing a computer program or instruction or through a logic circuit.

[0099] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0100] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0101] In an eighth aspect, a communication device is provided, comprising a processor, wherein the processor is configured to enable the communication device to execute the second aspect and any possible method of the second aspect by executing a computer program or instruction or through a logic circuit.

[0102] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0103] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0104] In the ninth aspect, a communication device is provided, comprising a logic circuit and an input / output interface, the input / output interface being used to input and / or output signals, the logic circuit being used to execute the first aspect and any possible method of the first aspect; or, the logic circuit being used to execute the second aspect and any possible method of the second aspect; the logic circuit being used to execute the third aspect and any possible method of the third aspect.

[0105] In the tenth aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or the instruction is run on a computer, the first aspect and any possible method of the first aspect are executed; or, the second aspect and any possible method of the second aspect are executed; or, the third aspect and any possible method of the third aspect are executed.

[0106] In the eleventh aspect, a computer program product is provided, comprising instructions, which, when executed on a computer, cause the first aspect and any possible method of the first aspect to be executed; or, cause the second aspect and any possible method of the second aspect to be executed; cause the third aspect and any possible method of the third aspect to be executed; or.

[0107] In the twelfth aspect, a communication system is provided, which includes the communication device described in the seventh aspect and the communication device described in the eighth aspect.

[0108] For the description of the beneficial effects of the fourth to twelfth aspects, reference can be made to the description of the first to third aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0109] FIG1 is a schematic diagram of a network architecture provided in an embodiment of the present application.

[0110] FIG2 is a schematic flowchart of a communication method provided in an embodiment of the present application.

[0111] FIG3 is a schematic diagram of another network architecture provided by an embodiment of the present invention.

[0112] FIG4 is a schematic flowchart of another communication method provided in an embodiment of the present application.

[0113] FIG5 is a schematic flowchart of sending third indication information provided in an embodiment of the present application.

[0114] FIG6 is a schematic flowchart of another communication method provided in an embodiment of the present application.

[0115] FIG7 is a schematic flowchart of another communication method provided in an embodiment of the present application.

[0116] FIG8 is a schematic diagram of a first frequency domain resource and a second frequency domain resource provided in an embodiment of the present application.

[0117] FIG9 is a schematic diagram of another first frequency domain resource and a second frequency domain resource provided in an embodiment of the present application.

[0118] FIG10 is a schematic diagram of a first time domain resource and a second time domain resource provided in an embodiment of the present application.

[0119] FIG11 is a schematic diagram of another first time domain resource and a second time domain resource provided in an embodiment of the present application.

[0120] FIG12 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0121] FIG13 is a schematic block diagram of another communication device provided in an embodiment of the present application.

[0122] FIG14 is a schematic block diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0123] The technical solution in this application will be described below with reference to the accompanying drawings.

[0124] Before introducing the embodiments, the terms involved in this application are described in detail.

[0125] 1. Line-of-sight transmission

[0126] Signal propagation in airborne communications is primarily based on line-of-sight propagation (LOS propagation). This is a method in which wireless signals travel unobstructed in a straight line between the transmitter and receiver. In other words, wireless signals travel directly from the transmitter to the receiver within a range where the transmitting and receiving antennas can "see" each other (e.g., without obstructions).

[0127] 2. Time unit

[0128] The time unit may be a time slot, an orthogonal frequency division multiplexing (OFDM) symbol, a mini-slot, a transmission time interval (TTI), or a subframe.

[0129] 3. Frequency Domain Resource Grid (resourcegrid)

[0130] All or part of the frequency domain resources of the cell's transmission bandwidth can be divided into multiple frequency domain resource grids, and each frequency domain resource grid may include part of the resource blocks (resourceblock, RB) in the transmission bandwidth. For example, the cell's transmission bandwidth may include 20 resource blocks, numbered RB#0 to 19. The 20 resource blocks can be divided into 5 frequency domain resource grids, numbered frequency domain resource grids #1 to #5, and each first frequency domain resource grid includes 4 RBs, that is, frequency domain resource grid #1 includes RB#0 to 3, frequency domain resource grid #2 includes RB#4 to 7, and so on. The frequency domain resource grid may also be called a frequency domain resource grid, a frequency domain resource unit, etc., which is not limited in this patent.

[0131] First, with reference to FIG1 , the communication system and network architecture applicable to the embodiment of the present application are introduced.

[0132] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, universal mobile telecommunication systems (UMTS), etc. The technical solutions provided in this application can also be applied to future communication systems, such as sixth generation (6G) mobile communication systems. The technical solutions provided in this application can also be applied to device to device (D2D) communication, vehicle to everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), Internet of Things (IoT) communication systems, non-terrestrial network (NTN) communication systems or other communication systems.

[0133] This application can also be applied to other communication systems. Any communication system in which an entity needs to send downlink data and pilot information, another entity needs to receive indication information, and can provide uplink feedback and transmit data. In other words, the communication system has downlink and uplink communication links.

[0134] It should be understood that the embodiments of the present application do not specifically limit the specific structure of the execution subject of the provided method. As long as it is possible to communicate according to the method provided by the embodiments of the present application by running a program that records the code of the method provided by the embodiments of the present application, for example, the execution subject of the method provided by the embodiments of the present application can be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.

[0135] As an example, Figure 1 shows a schematic diagram of a network architecture provided by an embodiment of the present application. Exemplarily, the architecture may include terminal devices UE1 and UE2, and network devices.

[0136] The terminal device involved in the embodiments of the present application may also be referred to as a terminal, which may be a device with wireless transceiver functions, which may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it may also be deployed on the water (such as ships, etc.); it may also be deployed in the air (such as airplanes, balloons, and satellites, etc.). The terminal device may be a user equipment (UE). Among them, the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with wireless communication functions. Exemplarily, the UE may be a mobile phone, a tablet computer, or a computer with wireless transceiver functions, etc. In addition, the terminal device may also be a device that can support the terminal to implement the function, such as a chip or a chip system, which may be installed in the terminal. In the technical solution provided in the embodiments of the present application, the technical solution provided in the embodiments of the present application is described by taking the terminal as an example in which the device for implementing the function of the terminal is a terminal. It should be understood that terminal is a general term, including the most common mobile phones, CPE, and integrated access backhaul (IAB) terminals. Terminal devices can also be virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, wireless terminals in smart grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.

[0137] In the embodiments of the present application, the device for implementing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0138] The network devices involved in the embodiments of the present application include base stations (BS), which can be devices deployed in a wireless access network that can communicate wirelessly with a terminal. Among them, the base station may have various forms, for example, a macro base station, a micro base station, a relay station and an access point, a backhaul station, etc. Exemplarily, the base station involved in the embodiments of the present application may be a base station in 5G or a base station in LTE. Among them, the base station in 5G can also be called a transmission reception point (TRP) or a next generation base station (next generation nodded, gNB). In the embodiments of the present application, the device for realizing the function of the network device can be a network device; it can also be a device that can support the network device to realize the function, such as a chip or a chip system, which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the technical solution provided in the embodiments of the present application, the device for realizing the function of the network device is a network device, and the network device is a base station as an example to describe the technical solution provided in the embodiments of the present application.

[0139] As shown in Figure 1, network devices and terminals UE1 and UE2 form a communication network. UE1 can be the aforementioned aerial drone terminal, such as an unmanned aircraft terminal, or it can be a terminal device inside a drone. UE2 can be any of the ground terminals listed above. The network device can be the aforementioned gNB. In this network architecture, the network device can send downlink data to terminals UE1 and UE2, and terminals UE1 and UE2 can also send uplink data to the network device.

[0140] It should be understood that the network architecture shown above is only an exemplary illustration, and the communication system applicable to the embodiments of the present application is not limited thereto, and any communication that can realize the functions of the above-mentioned network elements is applicable to the embodiments of the present application. For example, the network architecture shown in Figure 1 may include a larger number and more types of aerial UEs and ground UEs. For another example, the communication system of the embodiment of the present application may also be a non-terrestrial network (NTN) communication system, such as a satellite communication network, a high altitude platform system (HAPS) and an air-to-ground network. For example, a satellite communication system may include a satellite, and there is a terminal device on the satellite to communicate with a ground base station. Among them, the satellite may refer to a non-ground base station or non-ground equipment such as a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, and a high-orbit satellite. The NTN communication system can be deployed alone or as a supplement to the ground network.

[0141] It should also be understood that the above naming is only defined to facilitate the distinction between different functions and should not constitute any limitation to this application. This application does not exclude the possibility of adopting other naming in 6G networks and other future networks.

[0142] The following describes the existing interference management process and existing technical problems.

[0143] Currently, aerial communication services are gaining widespread adoption. For example, drones provide aerial logistics services, while low-altitude unmanned aircraft can provide aerial commuting services in cities, alleviating congestion. Downlink communications for aerial communication services require high spectrum efficiency to meet the entertainment and communication needs of aerial devices. Uplink communications also require high throughput to support real-time control backhaul for aerial devices.

[0144] Compared with the traditional ground communication between the network device and the terminal UE2 in Figure 1, the air signal transmission between the network device and the terminal UE1 is mainly line-of-sight propagation (LOS propagation). Due to the unobstructed straight-line propagation, the attenuation of the wireless signal of line-of-sight propagation is smaller than that of traditional ground communication, and the signal strength is greater and the signal coverage is wider. Therefore, in the above-mentioned air communication scenarios such as air signal transmission, compared with traditional ground communication, there are more ground cells or air cells that interfere with the cells serving air UEs, or there are more communication devices that interfere with the cells serving air UEs, resulting in the signal transmission or reception performance of the air UE being affected.

[0145] Currently, airborne cells and terrestrial cells can manage inter-cell interference by exchanging scheduling information. For example, when an airborne device is sending or receiving data, the interfering cell on the ground or in the air obtains the scheduling information of the cell serving the airborne device and performs interference avoidance on the corresponding scheduled resources. In other words, it does not send or receive signals on the scheduled resources of the cell serving the airborne device. However, as mentioned above, the number of interfering cells in the airborne signal transmission scenario is large, so this method requires a large number of inter-site information exchanges, and the interaction delay is relatively long.

[0146] To solve the above technical problems, the present application provides a communication method 200 that can achieve low-latency inter-cell interference avoidance. An embodiment of the communication method 200 will be described below with reference to Figures 2 to 11 .

[0147] Example 1:

[0148] Figure 2 is a schematic diagram of the interaction flow of a communication method 200 according to an embodiment of the present application, which includes a first network device, a second network device, and a first terminal device. The method shown in Figure 2 can be performed by the first network device, the second network device, and the first terminal device, or by modules and / or devices (e.g., chips or integrated circuits) with corresponding functions installed in the first network device, the second network device, and the first terminal device, and this application does not limit this.

[0149] FIG3 illustrates a schematic diagram of a network architecture suitable for use with communication method 200. As shown in FIG3 , a first network device may establish a communication connection with a first terminal device, or the first network device may provide services to the first terminal device. A second network device may not establish a communication connection with the first terminal device (it should be understood that the receipt of a first signal from the first terminal device by the second network device does not necessarily mean that the second network device has established a communication connection with the first terminal device), or in other words, the second network device may not serve the first terminal device.

[0150] As shown in Figure 3, the second network device may be a network device serving a second terminal device in a second cell. The first terminal device may be an airborne terminal or a terminal on an airborne device. The first terminal device establishes a connection with the first network device, but does not establish a communication connection with the second network device. The second network device may establish a communication connection with the second terminal device, which may be a terminal device in the second cell.

[0151] As shown in Figure 3, since the first terminal device can be an aerial terminal or a terminal on an aerial device, that is, the user of the first terminal device is an aerial user, the first cell closer to the first terminal device can be an aerial cell, and the first network device can be an aerial base station. Correspondingly, the second cell farther from the first terminal device can be a terrestrial cell, the user of the second terminal device is a terrestrial user, and the second network device can be a terrestrial base station.

[0152] As shown in Figure 2, communication method 200 includes steps S250 and S260. Optionally, communication method 200 may also include steps S210 to S240. In other words, in communication method 200, the steps of determining the first signal and determining the resources used to transmit the first signal are optional steps. In other words, communication method 200 may include only steps S250 and S260, or may include steps S210 to S260 as shown in Figure 2.

[0153] Optionally, in step S210, the first network device obtains first configuration information and / or resource configuration information.

[0154] In some embodiments of the present application, the first network device may first determine the first configuration information of the first cell and / or determine the resource configuration information based on the first cell to which it belongs, and then implement the acquisition of the first configuration information and / or resource configuration information in step S210. In other words, in the embodiments of the present application, the process of the network device acquiring information may include an equivalent replacement description, that is, the network device first determines the information and then acquires the information.

[0155] Specifically, the first configuration information may include cell configuration information and / or location information of the first cell, so as to determine the first signal, where the first signal is used to indicate that there is transmission or reception of the second signal between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource; the resource configuration information is used to indicate the first resource (such as indicating the time domain resource and the frequency domain resource). The first resource can be used by the first terminal device to send the first signal, and the first resource can also be used by the second network device to receive the first signal.

[0156] Exemplarily, the cell configuration information of the first cell may include the physical cell identifier of the first cell or sequence information of the first signal indicated by the first cell. In this case, the first signal may be a cell-level reference signal generated based on the cell configuration information of the first cell. For example, the first signal is a sequence generated based on a root index (such as a Zadoff Chu sequence), and the root index may be equal to the value of the physical cell identifier of the first cell, or the root index may be equal to the sequence value of the first signal indicated by the first cell. For example, the first signal is scrambled by a first scrambling code, and the first scrambling code is generated based on the physical cell identifier of the first cell. The location information of the first cell may include global positioning system (GPS) information and other information used to indicate the area or location of the first cell. In this case, the first signal may be a regional-level signal generated based on the location information.

[0157] For example, the first network device is defined to use signal A in area A and signal B in predefined or preconfigured area B through a predefined or preconfigured manner. The first network device determines that it is currently located in area A based on the acquired location information, and further determines that the first signal is signal A corresponding to area A.

[0158] Exemplarily, the resource configuration information may include any one or more of the following: frequency domain resource configuration information indicating the frequency domain resources for sending or receiving the first signal, time domain resource configuration information indicating the time domain resources for sending or receiving the first signal, and code domain resource configuration information indicating the code domain resources for sending or receiving the first signal.

[0159] Optionally, in step S220, the first network device sends the first configuration information and / or resource configuration information.

[0160] Specifically, as shown in FIG2 , step S220 includes steps S221 and S225:

[0161] S221: Send first configuration information and / or resource configuration information to the second network device.

[0162] Correspondingly, the second network device receives the first configuration information and / or resource configuration information from the first network device.

[0163] Furthermore, optionally, upon receiving the first configuration information and / or resource configuration information, the second network device may execute step S230 to determine the first signal to be received based on the first configuration information and / or resource configuration information. Alternatively, the second network device may attempt to receive or detect the first signal based on the first configuration information and / or resource configuration information. The second network device may receive or detect the first signal via an air interface or other means, and may further receive the first signal from the first terminal device via an air interface or other means.

[0164] S225: Send first configuration information and / or resource configuration information to the first terminal device.

[0165] Correspondingly, the first terminal device receives the first configuration information and / or resource configuration information from the first network device.

[0166] Furthermore, upon receiving the first configuration information and / or resource configuration information, the first terminal device determines the first signal, i.e., executes step S240 in the communication method 200. Furthermore, the first terminal device may send the first signal on the first time domain resource and the first frequency domain resource.

[0167] In an embodiment of the present application, the first terminal device may be an aerial terminal UE1 belonging to the first cell in the network architecture shown in FIG1 , or may be a terminal device on an aerial device such as a satellite or a balloon as mentioned above.

[0168] The present application does not limit the order of steps S221 and S225. The two steps can be performed sequentially or simultaneously.

[0169] Optionally, step S220 may further include step S227, where the first network device sends third indication information to the first terminal device.

[0170] Correspondingly, the first terminal device receives third indication information from the first network device.

[0171] Specifically, the third indication information is used to instruct the first terminal device to send a first signal on the first time domain resource and the first frequency domain resource, for example, triggering the first terminal device to send the first signal. For example, the first network device may send the third indication information at the same time as sending the first configuration information and / or resource configuration information in step S225, such as using the same channel resource to send the above information. For another example, as shown in Figure 2, the first network device may send the third indication information to the first terminal device through step S227 at any time before the first terminal device executes step S240. This application does not impose any restrictions on the method for sending the third indication information.

[0172] Optionally, the third indication information may be the first information used to schedule the second signal, such as downlink control information (DCI), or may be one or more bits carried in the first information (such as carried in DCI), and the first information is used to schedule the first signal, that is, the first information can be used to schedule the first network device to send or receive the first signal. Specifically, for example, after receiving the first information, the first network device may default to sending the first signal first, and then send or receive the second signal. Therefore, in addition to scheduling the second signal, the first information also has the function of indicating the sending of the first signal. For another example, the third indication information may be triggering the first terminal device to send the first signal on the first time domain resource and the first frequency domain resource, that is, after receiving the third indication information, the first terminal device immediately sends the first signal at the end time of the third indication information. This application does not limit the specific content of the third indication information.

[0173] Optionally, in step S240, the first terminal device determines a first signal.

[0174] Specifically, the first signal is used to indicate that a second signal is sent or received between the first network device and the first terminal device on the second time domain resources and the second frequency domain resources.

[0175] Optionally, the second signal may be a data signal, such as a physical downlink shared channel (PDSCH) signal or a physical uplink shared channel (PUSCH) signal, or a control signal, such as a physical downlink control channel (physical downlink control channel), or a reference signal, such as a positioning reference signal (position reference signal).

[0176] Step S250: The first terminal device sends the first signal on the first time domain resources and the first frequency domain resources.

[0177] Optionally, the second network device can receive or detect the first signal from the first terminal device on the first time domain resource and the first frequency domain resource, wherein the second network device can be any network device that can receive or detect the first signal. In an embodiment of the present application, the second network device and the first terminal device can send and receive signals through the air interface. Compared with the information interaction between cell sites, the time delay of information interaction through the air interface is shorter. The first signal is used to indicate that there is sending or receiving of the second signal between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource. That is, the first terminal device sends the first signal, which means that there is sending or receiving of the second signal between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource; the first terminal device does not send the first signal, which means that there is no sending or receiving of the first signal between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource. That is, the second network device detects or receives the first signal, which means that the second network device determines that there is transmission or reception of the first signal between the first network device and the first terminal device on the second time domain resources and the second frequency domain resources; the second network device does not detect or receive the first signal, which means that the second network device determines that there is no transmission or reception of the first signal between the first network device and the first terminal device on the second time domain resources and the second frequency domain resources.

[0178] It should be understood that within the second time domain resources, the above-mentioned second frequency domain resources are frequency domain resources in which the above-mentioned first terminal device does not expect to receive signals from other network devices other than the first network device; or, within the second time domain resources, the above-mentioned first terminal device does not expect to receive signals from other network devices other than the first network device on the second frequency domain resources.

[0179] In an embodiment of the present application, the second time domain resource indicated by the first signal is located after the first time domain resource in step S250. Specifically, the first time domain resource may be continuous with the second time domain resource, that is, the end time of the first time domain resource and the start time of the second time domain resource are the same time. In other embodiments of the present application, the end time of the first time domain resource and the start time of the second time domain resource may be separated by one or more time units, and the one or more time units may be predefined or determined by configuration parameters. The first time domain resource and the second time domain resource will be described in detail later and will not be repeated here.

[0180] In an embodiment of the present application, the frequency range of the first frequency domain resource may include the frequency range of the second frequency domain resource, that is, the frequency range of the frequency domain resource of the first signal may include the frequency range of the frequency domain resource of the second signal. The first time domain resource and the second time domain resource will be described in detail later and are not detailed here.

[0181] Step S260: The second network device determines, based on the first signal, the signal transmission or reception between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

[0182] Specifically, after the second network device receives the first signal on the first time domain resource and the first frequency domain resource, the second network device determines, based on the second time domain resource and the second frequency domain resource indicated in the first signal, the transmission or reception of the signal between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource. The second cell may include the second terminal device that interferes with the transmission or reception of the second signal, that is, the signal sent or received by the second terminal device in the second cell may interfere with the second signal.

[0183] It should be understood that the signal between the second network device and the second terminal device may be any signal, a dynamically scheduled signal, or a signal that is periodically sent or received.

[0184] Optionally, the second network device determines that the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically that the second network device may send a first indication message, and the first indication message is used to indicate to stop or cancel the signal transmission or reception of the third signal between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource. Accordingly, the second terminal device stops or cancels the transmission or reception of the third signal on the second time domain resource and the second frequency domain resource according to the first indication message. That is, if the second network device receives the first signal on the first time domain resource and the first frequency domain resource, the second network device may send the first indication message. If the second network device does not receive the first signal on the first time domain resource and the first frequency domain resource, the second network device does not send the first indication message.

[0185] Optionally, the second network device determines that the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically that the second network device can send a second indication information, and the second indication information is used to indicate the adjustment of the spatial transmission configuration of the third signal. For example, after receiving the second indication information, the second terminal device can adjust the spatial transmission configuration of the third signal, such as the precoding matrix, or spatial filter, or beam of the third signal. Accordingly, the second terminal device can adjust the spatial transmission configuration of the third signal according to the second indication information. For another example, before receiving the second indication information, the second terminal device determines that the spatial transmission configuration of the third signal is the first spatial transmission configuration, such as the first precoding matrix. After receiving the second indication information, the second terminal device determines that the spatial transmission configuration of the third signal is the second spatial transmission configuration, such as the second precoding matrix. Therefore, it can also be said that the second indication information indicates the second spatial domain transmission configuration of the third signal in the fourth time domain resource, the total sending or receiving time period of the second signal is the second time domain resource, the fourth time domain resource is a part of the second time domain resource, and the spatial domain transmission configuration of the second signal in the fourth time domain resource is the second spatial domain transmission configuration. Before the fourth time domain resource, the spatial domain transmission configuration of the second signal can be the first spatial domain transmission configuration, and the first spatial domain transmission configuration can be different from the second spatial domain transmission configuration. That is, if the second network device receives the first signal on the first time domain resource and the first frequency domain resource, the second network device can send the second indication information. If the second network device does not receive the first signal in the first time domain resource, the second network device does not send the second indication information.

[0186] Optionally, the second network device determines that the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically that the second network device may also send a fourth indication message, and the fourth indication message is used to indicate that it is determined that no signal transmission or reception is performed between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource. Furthermore, the transmission or reception of signals that interfere with the second signal between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource can be avoided. That is, if the second network device receives the first signal on the first time domain resource, the second network device may determine that no signal transmission or reception is performed between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource. If the second network device does not receive the first signal on the first time domain resource, the second network device may send or receive signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0187] It is worth noting that the step of the second network device sending the first indication information, the second indication information, or the fourth indication information can be used to replace step S260. In other words, step S260 performed by the second network device is any one of the steps of the second network device sending the first indication information, the second indication information, or the fourth indication information to the second terminal device.

[0188] Optionally, the communication method 200 may further include step S270, in which the first terminal device sends or receives a second signal on the second time domain resource and the second frequency domain resource. In other words, the first terminal device has a need to send or receive the second signal. It should be understood that the role of the first signal is to indicate that there is a sending or receiving of the second signal between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource. Therefore, after the first terminal device sends the first signal on the first time domain resource and the first frequency domain resource, the first terminal device may also send or receive the second signal on the second time domain resource and the second frequency domain resource. That is, if the first terminal device sends the first signal on the first time domain resource and the first frequency domain resource, it will also send or receive the second signal on the second time domain resource and the second frequency domain resource; if the first terminal device does not send the first signal on the first time domain resource and the first frequency domain resource, it will not send or receive the second signal on the second time domain resource and the second frequency domain resource.

[0189] The following describes in detail the interaction process between two communication devices in the communication method 200 in conjunction with Examples 2 to 4. The detailed description of each feature in the solutions of Examples 2 to 4 can refer to Example 1. In other words, the features in Examples 2 to 4 that are the same as those in Example 1 can refer back to Example 1, such as the first signal, first configuration information, resource configuration information, etc. This article does not elaborate on this.

[0190] Example 2:

[0191] Fig. 4 shows an interactive flow chart of a communication method 400. As shown in Fig. 4, the communication method S400 includes steps S410 to S470, and steps S410 to S470 can all refer back to the description of steps S210 to S270.

[0192] Step S410: The first network device obtains first configuration information and / or resource configuration information.

[0193] Step S410 may refer to step S210 in Example 1, and the first configuration information and / or resource configuration information in step S410 may refer back to the description in Example 1. As mentioned above, the first configuration information may include cell configuration information and / or location information of the first cell, for determining the first signal; the resource configuration information is used to indicate the first resource, i.e., the first time domain resource and the first frequency domain resource mentioned above, the first resource being used by the first terminal device to send the first signal, and the first resource being used by the second network device to receive the first signal.

[0194] Step S425: The first network device sends first configuration information and / or resource configuration information to the first terminal device.

[0195] Step S425 may refer to step S225 in embodiment 1. Correspondingly, the first terminal device receives the first configuration information and / or resource configuration information from the first network device.

[0196] Optionally, the communication method 400 may further include step S427, where the first network device sends third indication information to the first terminal device.

[0197] Step S427 may refer to step S227 in Example 1, and the third indication information may refer back to the description in Example 1. Correspondingly, the first terminal device receives third indication information from the first network device. Specifically, the third indication information is used to instruct the first terminal device to send a first signal in the first time domain resource and the first frequency domain resource, for example, triggering the first terminal device to send the first signal, and the first signal is used to indicate that a second signal is sent or received between the first network device and the first terminal device in the second time domain resource and the second frequency domain resource.

[0198] Figure 5 shows a schematic diagram of time domain resources for sending third indication information, wherein the third indication information can be the first information sent by the first network device, such as DCI, or the third indication information can be carried in the first information. As shown in Figure 5, the first network device can schedule the second signal through the first information, and the first terminal device sends the first signal on the first time domain resources and the first frequency domain resources after receiving the first information sent by the first network device. In the embodiment shown in Figure 5, the first network device sends the second signal to the first terminal device on the second time domain resources and the second frequency domain resources, and correspondingly, the first terminal device receives the first signal from the first network device on the second time domain resources and the second frequency domain resources.

[0199] As shown in (a) of Figure 5 , the first time domain resource and the second time domain resource can be continuous, and the sending or receiving of the first information and the sending or receiving of the first signal can also be continuous, or the first information is used to trigger the sending of the first signal on the first time domain resource and the first frequency domain resource. As shown in (b) of Figure 5 , the end time of the first time domain resource and the start time of the second time domain resource can be separated by at least one time unit, such as one symbol or one time slot. Optionally, the end time of the first information and the start time of the first signal can also be separated by at least one time unit.

[0200] Optionally, the first time domain resource may include one or more first time units, and the first time unit may be a symbol (such as an OFDM symbol). The first time unit may also be other time units, which is not limited in this patent.

[0201] Optionally, the second time domain resource may be a scheduled time period for receiving or transmitting the second signal. Taking the second signal as a PDSCH / PUSCH signal as an example, if the scheduled time domain resource for the PDSCH / PUSCH signal is L to L+K symbols in the first time slot, then the second time domain resource is L to L+K symbols in the first time slot.

[0202] Optionally, the second time domain resource may be a predefined or preconfigured time window, within which the first signal may be transmitted or received one or more times. For example, the time window may include one or more second time units, which may be time slots, symbols, or milliseconds. For another example, the time window may include J time slots, and the second signal is a PDSCH signal. Then, one transmission or reception of the PDSCH signal occurs within one time slot, and a maximum of J transmissions or receptions of the first signal may be performed within the time window.

[0203] The embodiments of the first time domain resource and the second time domain resource will be described in detail below and will not be elaborated here.

[0204] Step S440: The first terminal device determines the first signal.

[0205] Step S440 may refer to step S240 in Example 1, and the first signal in step S440 may refer back to the description in Example 1. Specifically, the first terminal device determines the first signal based on the received first configuration information and / or resource configuration information. The first signal is used to indicate that a second signal is being transmitted or received between the first network device and the first terminal device on the second time domain resource and the second frequency domain resource.

[0206] Step S450: The first terminal device sends a first signal on a first time domain resource and a first frequency domain resource.

[0207] Step S450 may refer to step S250 in embodiment 1. Optionally, the second network device may receive the first signal from the first terminal device in the second cell on the first time domain resource and the first frequency domain resource.

[0208] Optionally, the communication method 400 may further include step S470, in which the first terminal device transmits or receives a second signal on a second time domain resource and a second frequency domain resource. In other words, the first terminal device has a need to transmit or receive a second signal in the first cell on the second time domain resource and the second frequency domain resource. Accordingly, the first network device may receive or transmit the second signal on the second time domain resource and the second frequency domain resource. Step S470 may refer to step S270 in Example 1.

[0209] Example 3:

[0210] FIG6 shows an interactive flow chart of communication method 500. As shown in FIG3, the second network device may not have established a communication connection with the first terminal device, or in other words, the second network device does not serve the first terminal device. As shown in FIG6, communication method 500 includes steps S550 to S560.

[0211] Step S550: The first terminal device sends a first signal on a first time domain resource and a first frequency domain resource.

[0212] Step S550 may refer to step S250 in Example 1. Correspondingly, the second network device receives a first signal from the first terminal device on the first time domain resource and the first frequency domain resource, where the first signal is used to indicate that a second signal of the first cell is being sent or received on the second time domain resource and the second frequency domain resource. In an embodiment of the present application, the first terminal device and the second network device send and receive signals via an air interface. Compared to information exchange between cell sites, information exchange via the air interface has a shorter latency.

[0213] Step S560: The second network device determines, based on the first signal, the second time domain resource and the second frequency domain resource for signal transmission or reception between the second network device and the second terminal device.

[0214] Step S560 may refer to step S260 in Example 1. Specifically, after the second network device receives the first signal on the first time domain resource and the first frequency domain resource, it determines the signal transmission or reception between the second network device and the second terminal device in the second time domain resource and the second frequency domain resource based on the second time domain resource and the second frequency domain resource indicated in the first signal. The second cell may include the second terminal device that interferes with the transmission or reception of the second signal in the first cell, and the third signal sent or received by the second terminal device in the second cell may interfere with the second signal.

[0215] Example 4:

[0216] Figure 7 illustrates a flow chart of communication method 600, which is an interaction process between a second network device and a second terminal device. Communication method 600 occurs after step S250 in Figure 2 or S550 in Figure 6 , i.e., after the second network device receives the first signal in the first time domain resource, performing a specific embodiment of step 560. As shown in Figure 7, communication method 600 includes steps S660 through S680.

[0217] Step S660: The second network device determines, based on the first signal, the signal transmission or reception between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

[0218] 6 , step S660 may be any one of step S661 , step S664 and step S667 . In other words, any one of step S661 , step S664 and step S667 may be used to replace step S660 or step S260 described above.

[0219] Step S661: The second network device sends first indication information to the second terminal device.

[0220] Specifically, the first indication information is used to instruct the second terminal device to stop or cancel the transmission or reception of the third signal on the second time domain resource and the second frequency domain resource in the second cell, that is, the second terminal device has a transmission or reception requirement for the third signal before the transmission or reception of the second signal. The specific scheme of the first indication information can refer back to the description in Example 1.

[0221] Correspondingly, the second terminal device receives the first indication information from the second network device.

[0222] Furthermore, in step S670, the second terminal device stops or cancels the sending or receiving of the third signal on the second time domain resources and the second frequency domain resources according to the first indication information.

[0223] Step S664: The second network device sends second indication information to the second terminal device.

[0224] Specifically, the second indication information is used to instruct the second terminal device to adjust the spatial domain transmission configuration of the second cell on the second time domain resources and the second frequency domain resources for the third signal. The specific solution of the second indication information can be referred back to the description in embodiment 1.

[0225] Correspondingly, the second terminal device receives second indication information from the second network device.

[0226] Then, in step S680, the second terminal device adjusts the spatial transmission configuration of the third signal in the second cell according to the second indication information. Optionally, the spatial transmission configuration may include a precoding matrix, a spatial filter, or a beam of the third signal.

[0227] Step S667: The second network device sends fourth indication information to the second terminal device.

[0228] Specifically, the fourth indication information is used to instruct the second terminal device not to send or receive signals in the second cell on the second time domain resources and the second frequency domain resources. The specific solution of the fourth indication information can be referred back to the description in embodiment 1.

[0229] Correspondingly, the second terminal device receives fourth indication information from the second network device. Further, the second terminal device does not send or receive signals in the second cell on the second time domain resources and the second frequency domain resources according to the fourth indication information.

[0230] In the communication method of the present application, when a first terminal device has a need to send or receive a second signal, the first terminal device can first send the first signal, so that communication devices in other cells that cause interference to the first cell, such as second network devices, can identify the need to send or receive the second signal based on the first signal and adjust the signal transmission or reception in their respective cells to achieve interference avoidance and ensure that the data transmission or reception of the second signal is not interfered with. In addition, in the scenario of air-to-air transmission of air communication, information exchange between communication devices is carried out through the air interface, and the delay is shortened.

[0231] The following describes in detail the implementation of the first frequency domain resources and the second frequency domain resources in the communication method 200 in conjunction with Examples 5 and 6.

[0232] Example 5:

[0233] Figure 8 shows a schematic diagram of a first frequency domain resource and a second frequency domain resource applicable to Example 5. In an embodiment of the present application, the first cell shown in Figure 3 may include a first transmission bandwidth, and the first transmission bandwidth may be all or part of the frequency domain resources of the first cell. For example, all the frequency domain resources of the first cell are 20 resource blocks, and the first transmission bandwidth may include the 20 resource blocks. Among them, the frequency domain resources of the first transmission bandwidth may include K first frequency domain resource grids (resourcegrids), for example, the K first frequency domain resource grids may be the first frequency domain resource grid #1 to the first frequency domain resource grid #5 shown in Figure 8. By dividing the first frequency domain resource grid, the first transmission bandwidth is divided into K non-overlapping frequency domain resources.

[0234] Exemplarily, the first transmission bandwidth may include 20 resource blocks (RBs), numbered RB#0 to 19. The 20 resource blocks may be divided into five first frequency domain resource grids, numbered as first frequency domain resource grids #1 to #5 as shown in FIG8 , each first frequency domain resource grid including four RBs, i.e., first frequency domain resource grid #1 includes RB#0 to 3, first frequency domain resource grid #2 includes RB#4 to 7, and so on.

[0235] In step S250, the first terminal device sends a first signal on the first time domain resource and the first frequency domain resource. The first frequency domain resource may be M of the above-mentioned K first frequency domain resource grids, where M is a positive integer less than or equal to K. In other words, the first terminal device sends a first signal on the first time domain resource and the frequency domain resource of M of the above-mentioned K first frequency domain resource grids. As shown in Figure 8, the M first frequency domain resource grids may be the first frequency domain resource grid #1 and the first frequency domain resource grid #2. In other embodiments of the present application, the M first frequency domain resource grids may also be a plurality of discontinuous first frequency domain resource grids, such as the first frequency domain resource grid #1 and the first frequency domain resource grid #3.

[0236] The first signal is used to indicate the presence of transmission or reception of the second signal of the first cell on the second time domain resource and the second frequency domain resource. The second frequency domain resource may include N of the M first frequency domain resource grids, where N is less than or equal to M. For example, as shown in Figure 8, the frequency range of the second frequency domain resource may be the same as the frequency range of the first frequency domain resource, that is, the second frequency domain resource is the first frequency domain resource grid #1 and the first frequency domain resource grid #2. For another example, the frequency range of the second frequency domain resource may be part of the first frequency domain resource, that is, it includes N of the first frequency domain resource grids in the first frequency domain resource. Example 6 below will introduce a solution where N is less than M, which will not be described in detail here.

[0237] It should be understood that for the first terminal device in step S250, the first frequency domain resource grid is used as the scheduling granularity of the second signal. In other words, the first network device schedules the second frequency domain resources (i.e., the frequency domain resources included in N first frequency domain resource grids) for the first terminal device at the granularity of one first frequency domain resource grid to send or receive the second signal.

[0238] Furthermore, the first frequency domain resource grid is the transmission granularity of the first signal. In other words, the first network device transmits the first signal on the first frequency domain resources (ie, the frequency domain resources included in the M first frequency domain resource grids) with one first frequency domain resource grid as the granularity.

[0239] Accordingly, for the second network device in step S260, the first frequency domain resource grid is used as the detection granularity of the first signal. In other words, the second network device detects the first signal on each of the M first frequency domain resource grids with a first frequency domain resource grid as the granularity. Alternatively, the first signal is a set of M signals detected by the second network device on M first frequency domain resource grids with a first frequency domain resource grid as the granularity. The second network device receives or detects the first signal on the first time domain resource and the first frequency domain resource, and then in step S260, determines the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0240] As shown in Figure 8, the first terminal device can know that the second network device detects the first signal with the first frequency domain grid as the granularity, then the first terminal device can also send the first signal on the first time domain resource and the first frequency domain resource grid #1 and #2 with the first frequency domain resource grid as the granularity; at the same time, the first network device uses the first frequency domain resource grid as the scheduling granularity to schedule the first terminal device to send or receive the second signal on the second time domain resource and the first frequency domain resource grid #1 and #2; the second network device uses the first frequency domain resource grid as the detection granularity, and detects the first signal on the first time domain resource and the first frequency domain resource grid #1 to #5 respectively. The second network device detects the first signal on the first time domain resource and the first frequency domain resource grid #1 and #2, then the second network device knows that the first network device has sent or received the second signal on the second time domain resource and the first frequency domain resource grid #1 and #2.

[0241] Optionally, the first frequency domain resource grid is the generation granularity of the first signal. In other words, the first signal is a set of M signals generated by the first terminal device on M first frequency domain resource grids with one first frequency domain resource grid as the granularity. As shown in Figure 8, the first signal is a set of two signals generated by the first terminal device on the first frequency domain resource grid #1 and the first frequency domain resource grid #2.

[0242] Example 6:

[0243] Figure 9 shows a schematic diagram of a first frequency domain resource and a second frequency domain resource applicable to Example 6. Similar to Example 5, in an embodiment of the present application, the first cell shown in Figure 3 may include a first transmission bandwidth, and the first transmission bandwidth may be all or part of the frequency domain resources of the first cell. For example, all the frequency domain resources of the first cell are 20 resource blocks, and the first transmission bandwidth may include the 20 resource blocks. The frequency domain resources of the first transmission bandwidth may include K first frequency domain resource grids (resourcegrids), for example, the K first frequency domain resource grids may be the first frequency domain resource grid #1 to the first frequency domain resource grid #5 shown in Figure 8, and each first frequency domain resource grid may include one or more RBs.

[0244] In embodiment 6, the first transmission bandwidth may further be divided into X second frequency domain resource grids. As shown in (a) of Figure 9 , the second frequency domain resource grid may be divided in a different manner from the first frequency domain resource grid, i.e., the second frequency domain resource grid #1 to the second frequency domain resource grid #5 shown in (a) of Figure 9 . As shown in (b) of Figure 9 , the second frequency domain resource grid may be further divided based on the first frequency domain resource grid. For example, the frequency domain resources of the first frequency domain resource grid shown in (b) of Figure 9 are further divided into two second frequency domain resource grids. By dividing the second frequency domain resource grid, the first transmission bandwidth is further divided into X non-overlapping frequency domain resources.

[0245] As described in the above embodiment 5, in step S250, the first terminal device sends a first signal on the first time domain resource and the first frequency domain resource, wherein the first frequency domain resource may be M first frequency domain resource grids among the above K first frequency domain resource grids. As shown in Figure 9, the M first frequency domain resource grids may be the first frequency domain resource grid #1 and the first frequency domain resource grid #2. In other embodiments of the present application, the M first frequency domain resource grids may also be a plurality of discontinuous first frequency domain resource grids, such as the first frequency domain resource grid #1 and the first frequency domain resource grid #3.

[0246] The first signal is used to indicate that there is a transmission or reception of a second signal of the first cell on the second time domain resource and the second frequency domain resource. The second frequency domain resource may include L second frequency domain resource grids among the X second frequency domain resource grids, where L is less than or equal to X. For example, as shown in (a) of FIG9 , the frequency range of the second frequency domain resource may be the second frequency domain resource grid #1 and the second frequency domain resource grid #2; as shown in (b) of FIG9 , when the second frequency domain resource grid is further divided by the first frequency domain resource grid, the frequency range of the second frequency domain resource may be part or all of the frequency range of the M first frequency domain resources. For example, the second frequency domain resource may be the second frequency domain resource grid #1, the second frequency domain resource grid #3, and the second frequency domain resource grid #4. In other words, the second frequency domain resource may be part of the frequency domain resources of the first frequency domain resource grid #1 and all of the frequency domain resources of the first frequency domain resource grid #2. That is, the second frequency domain resource in Embodiment 5 may include N first frequency domain resource grids among the M first frequency domain resource grids (as shown in (b) of FIG9 , including the first frequency domain resource grid #2).

[0247] It should be understood that for the first terminal device in step S250, the second frequency domain resource grid is the scheduling granularity of the second signal. In other words, the first network device schedules the second frequency domain resources (i.e., the frequency domain resources included in L second frequency domain resource grids) for the first terminal device at the granularity of one second frequency domain resource grid and sends the second signal.

[0248] The first frequency domain resource grid is the transmission granularity of the first signal. In other words, the first network device transmits the first signal on the first frequency domain resources (ie, the frequency domain resources included in the M first frequency domain resource grids) with one first frequency domain resource grid as the granularity.

[0249] Accordingly, for the second network device in step S260, the first frequency domain resource grid is used as the detection granularity of the first signal. In other words, the second network device detects the first signal on each of the M first frequency domain resource grids with a first frequency domain resource grid as the granularity. Alternatively, the first signal is a set of M signals detected by the second network device on M first frequency domain resource grids with a first frequency domain resource grid as the granularity. The second network device receives or detects the first signal on the first time domain resource and the first frequency domain resource, and then in step S260, determines the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0250] As shown in (a) in Figure 9, the first terminal device can know that the second network device detects the first signal with the first frequency domain grid as the granularity, then the first terminal device can also send the first signal on the first time domain resource and the first frequency domain resource grid #1 and #2 with the first frequency domain resource grid as the granularity; at the same time, the first network device uses the second frequency domain resource grid as the scheduling granularity to schedule the first terminal device to send or receive the second signal on the second time domain resource and the second frequency domain resource grid #1 and #2; the second network device uses the first frequency domain resource grid as the detection granularity, and detects the first signal on the first time domain resource and the first frequency domain resource grid #1 to #5 respectively. The second network device detects the first signal on the first time domain resource and the first frequency domain resource grid #1 and #2, then the second network device knows that the first network device has sent or received the second signal on the second time domain resource and the second frequency domain resource grid #1 and #2.

[0251] As shown in (b) of Figure 9, the first terminal device can know that the second network device detects the first signal with the first frequency domain grid as the granularity, then the first terminal device can also send the first signal on the first time domain resource and the first frequency domain resource grid #1 and #2 with the first frequency domain resource grid as the granularity; at the same time, the first network device uses the second frequency domain resource grid as the scheduling granularity to schedule the first terminal device to send or receive the second signal on the second time domain resource and the second frequency domain resource grid #1, #3 and #4; the second network device uses the first frequency domain resource grid as the detection granularity, and detects the first signal on the first time domain resource and the first frequency domain resource grid #1 to #5 respectively. The second network device detects the first signal on the first time domain resource and the first frequency domain resource grid #1 and #2, then the second network device knows that the first network device has sent or received the second signal on the second time domain resource and the second frequency domain resource grid #1, #3 and #4.

[0252] Optionally, the first frequency domain resource grid is the generation granularity of the first signal. In other words, the first signal is a set of M signals generated by the first terminal device on M first frequency domain resource grids with one first frequency domain resource grid as the granularity. As shown in Figure 9, the first signal is a set of two signals generated by the first terminal device on the first frequency domain resource grid #1 and the first frequency domain resource grid #2.

[0253] Optionally, in step 260, different types of first signals carried on a first frequency domain resource grid correspond to different numbers of second frequency domain resource grids. Table 1 shows a correspondence between first frequency domain resource grid #1. For example, in the scenario shown in Figure 9, a first frequency domain resource grid may correspond to multiple types of first signals, wherein the multiple types of first signals are respectively used to indicate the presence of transmission or reception of second signals on different numbers of second frequency domain resource grids. The second network device determines the frequency range of the second frequency domain resource or which second frequency domain resource grids the second frequency domain resource includes by the type of the first signal received on the first time domain resource and the first frequency domain resource.

[0254] Table 1

[0255] As shown in Table 1, the types of first signals include 0 to 2, which respectively indicate that different numbers of second frequency domain resource grids are transmitting or receiving second signals. For example, when the second network device receives first signal 0 on first frequency domain resource grid #1, it means that the second frequency domain resource grid #0 is transmitting or receiving the second signal, or that the second frequency domain resources are determined to include second frequency domain resource grid #0 but not second frequency domain resource grid #1. Similarly, when the second network device receives first signal 1 on first frequency domain resource grid #1, it means that the second frequency domain resource grids #0 and #1 are transmitting or receiving second signals, or that the second frequency domain resources are determined to include second frequency domain resource grids #0 and #1.

[0256] Similarly, the first frequency domain resource grids #2 to #5 can all include the corresponding relationship shown in Table 1, and then the second network device can determine whether there is a second frequency domain resource grid for sending or receiving the second signal in each first frequency domain resource grid based on the type of the first signal received in the first frequency domain resource grids #2 to #5, and finally determine all the second frequency domain resource grids included in the second frequency domain resources.

[0257] It is worth noting that embodiments 5 and 6 are only examples. The embodiments of the present application may include more first frequency domain resource grids and second frequency domain resource grids, and the present application does not limit the division of the first frequency domain resource grid and the second frequency domain resource grid.

[0258] The following describes in detail the implementation of the first time domain resource and the second time domain resource in the communication method 200 in conjunction with Example 7.

[0259] Example 7:

[0260] In embodiment 7, the first time domain resource and the second time domain resource may be included in one time unit, and the first time domain resource is located before the second time domain resource. Optionally, the one time unit may also include the third time domain resource shown in Figure 5, which is located before the first time domain resource and is a time period for the first network device to send the third indication information or the first terminal device to receive the third indication information. The third indication information may be the first information for scheduling the sending or receiving of the second signal, such as DCI, or it may be carried in the first information. Figure 10 shows a schematic diagram of embodiment 7 when the time unit is a time slot.

[0261] As shown in (a) of Figure 10, when the second signal is an uplink signal, the first signal is also an uplink signal. The first time domain resource and the second time domain resource occupy 14 symbols in a time slot, where the position of the first time domain resource in the time slot can be predefined, such as the first OFDM symbol in a predefined time slot is the first time domain resource, and the position of the second time domain resource in the time slot is the second to fourteenth OFDM symbols in the time slot.

[0262] As shown in (b) of Figure 10, when the second signal is a downlink signal, the first signal is an uplink signal. The first time domain resource and the second time domain resource occupy 14 symbols in a time slot, where the position of the first time domain resource in the time slot can be predefined, such as the first OFDM symbol in a predefined time slot is the first time domain resource, and the position of the second time domain resource in the time slot is the second to fourteenth OFDM symbols in the time slot.

[0263] As shown in (c) of Figure 10, the time slot may also include a third time domain resource. When the second signal is a downlink signal and the first signal is an uplink signal, third indication information of the third time domain resource may be carried in the downlink signal. The third time domain resource, the first time domain resource, and the second time domain resource occupy 14 symbols in a time slot, wherein the position of the first time domain resource in the time slot may be predefined, such as the second OFDM symbol in a predefined time slot being the first time domain resource, the position of the third time domain resource in the time slot being the first OFDM symbol, and the position of the second time domain resource in the time slot being the third to fourteenth OFDM symbols in the time slot.

[0264] As shown in (d) of Figure 10, the time slot may also include a third time domain resource. When the second signal is an uplink signal, the first signal is also an uplink signal, and third indication information for the third time domain resource may be carried in the downlink signal. The third time domain resource, the first time domain resource, and the second time domain resource occupy 14 symbols in a time slot, wherein the first time domain resource may be located in the second OFDM symbol in the time slot, the third time domain resource may be located in the first OFDM symbol in the time slot, and the second time domain resource may be located in the third to fourteenth OFDM symbols in the time slot.

[0265] It is worth noting that the time slots shown in FIG10 are only examples, and one or more OFDM symbols may be spaced between the first time domain resource and the third time domain resource or between the first time domain resource and the second time domain resource.

[0266] In some other embodiments of the present application, the first time domain resource may be included in the second time unit, the second time domain resource may include one or more time units, and the one or more time units may include the second time unit. Figure 11 shows a schematic diagram of another embodiment of the first time domain resource and the second time domain resource. As shown in Figure 11, the position of the first time domain resource in the time slot may be predefined, for example, the position of the first time domain resource in the time slot is predefined as the first OFDM symbol of time slot 1. The second time domain resource may include the second to fourteenth OFDM symbols in time slot 1 and all OFDM symbols in time slot 2. It should be understood that in this way, the second network device receives the first signal in the time unit in time slot 1, and can determine whether the second signal is sent or received in subsequent multiple time slots. It should be understood that as the second time domain resource is lengthened, the time domain overhead of the first signal gradually decreases. For example, within 20 time slots, if the length of the second time domain resource is 5 time slots, that is, 4 second time domain resources are included in 20 time slots, then 4 first time domain resources are required to send the first signal; if the length of the second time domain resource is 10 time slots, that is, 2 second time domain resources are included in 20 time slots, then only 2 first time domain resources are required to send the first signal.

[0267] Finally, the device embodiment of the embodiment of the present application is introduced.

[0268] To implement the various functions of the methods provided herein, communication devices, such as terminal devices or network devices, may include hardware structures and / or software modules, and implement the aforementioned functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0269] Figure 12 is a schematic block diagram of a communication device 1200 according to an embodiment of the present application. Communication device 1200 includes a processor 1210 and a communication interface 1220, which may be interconnected via a bus 1230. Communication device 1200 may be a network device or terminal device, etc., that executes the communication methods 200, 400, 500, and 600.

[0270] Optionally, the communication device 1200 may further include a memory 1240. The memory 1240 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), and is used to store relevant instructions and data.

[0271] The processor 1210 may be one or more central processing units (CPUs). In the case where the processor 1210 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0272] When the communication apparatus 1200 is a first network device, illustratively, the communication apparatus 1200 is configured to perform the following operations: sending first configuration information and / or resource configuration information.

[0273] When the communication device 1200 is a second network device, illustratively, the communication device 1200 is used to perform the following operations: determine, based on the first signal, the transmission or reception of signals between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

[0274] When the communication apparatus 1200 is a first terminal device, illustratively, the communication apparatus 1200 is configured to perform the following operations: sending a first signal on a first time domain resource and a first frequency domain resource.

[0275] When the communication device 1200 is the first network device, the second network device or the first terminal device, it will be responsible for executing the methods or steps related to the first network device, the second network device or the first terminal device in the above method embodiments.

[0276] The above description is merely exemplary. For details, please refer to the contents of the above method embodiments. The implementation of each operation in FIG12 may also correspond to the corresponding description of the method embodiments shown in FIG2 , FIG4 , FIG6 , and FIG7 .

[0277] Figure 13 is a schematic block diagram of a communication device 1300 according to an embodiment of the present application. Communication device 1300 may be a first network device, a second network device, or a first terminal device, or may be a chip or module within such a device, configured to implement the methods described in the above embodiments. Communication device 1300 includes a transceiver unit 1310 and a processing unit 1320. The following provides an exemplary description of transceiver unit 1310 and processing unit 1320.

[0278] The transceiver unit 1310 may include a transmitting unit and a receiving unit. The transmitting unit is used to perform a transmitting operation of the communication device, and the receiving unit is used to perform a receiving operation of the communication device. For ease of description, this embodiment of the application combines the transmitting unit and the receiving unit into a single transceiver unit. This is described here as a unified description and will not be repeated later.

[0279] When the communication apparatus 1300 is a first network device, illustratively, the transceiver unit 1310 is configured to send the first configuration information and / or resource configuration information.

[0280] When the communication device 1300 is a second network device, exemplarily, the transceiver unit 1310 is used to receive a first signal on a first time domain resource and a first frequency domain resource, and the processing unit 1320 is used to determine, based on the first signal, the sending or receiving of signals between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource.

[0281] When the communication device 1300 is a first terminal device, illustratively, the transceiver unit 1310 is used to send a first signal, etc. on a first time domain resource and a first frequency domain resource.

[0282] When the communication device 1300 is the first network device, the second network device or the first terminal device, it will be responsible for executing the methods or steps related to the first network device, the second network device or the first terminal device in the above method embodiments.

[0283] Optionally, the communication device 1300 further includes a storage unit 1330, which is used to store a program or code for executing the aforementioned method.

[0284] The device embodiments shown in Figures 12 and 13 are used to implement the contents described in Figures 2, 4, 6 and 7. The specific execution steps and methods of the devices shown in Figures 12 and 13 can refer to the contents described in the above method embodiments.

[0285] Figure 14 is a schematic block diagram of a communication device 1400 according to an embodiment of the present application. The communication device 1400 is used to implement the functions of a first network device, a second network device, or a first terminal device. The communication device 1400 may be a chip in the first network device, the second network device, or the first terminal device.

[0286] Communication device 1400 includes an input / output interface 1420 and a processor 1410. Input / output interface 1420 may be an input / output circuit. Processor 1410 may be a signal processor, a chip, or other integrated circuit capable of implementing the method of the present application. Input / output interface 1420 is used for inputting or outputting signals or data.

[0287] For example, when the communication device 1400 is a first network device, the input / output interface 1420 is used to send the first configuration information and / or resource configuration information.

[0288] For example, communication device 1400 is a second network device, and input / output interface 1420 is configured to receive a first signal on a first time domain resource and a first frequency domain resource. Processor 1410 is configured to determine, based on the first signal, whether to transmit or receive signals between the second network device and a second terminal device on a second time domain resource and a second frequency domain resource.

[0289] For example, when the communication device 1400 is a first terminal device, the input / output interface 1420 is used to send the first signal, etc. on a first time domain resource and a first frequency domain resource.

[0290] In one possible implementation, the processor 1410 implements the functions implemented by the network device or the terminal device by executing instructions stored in the memory.

[0291] Optionally, the communication device 1400 further includes a memory.

[0292] Optionally, the processor and memory are integrated together.

[0293] Optionally, the memory is outside the communication device 1400 .

[0294] In one possible implementation, the processor 1410 may be a logic circuit that inputs / outputs messages or signals through the input / output interface 1420. The logic circuit may be a signal processor, a chip, or other integrated circuit that can implement the method of the embodiment of the present application.

[0295] The above description of the communication device 1400 is only an exemplary description. The communication device 1400 can be used to execute the method described in the above embodiments. For specific content, please refer to the description of the above method embodiment, which will not be repeated here.

[0296] The present application also provides a chip, including a processor, for calling and executing instructions stored in a memory from the memory, so that a communication device equipped with the chip executes the methods in the above examples.

[0297] The present application also provides a chip, comprising: an input interface, an output interface, and a processor, wherein the input interface, the output interface, and the processor are connected via an internal connection path, and the processor is configured to execute code in a memory. When the code is executed, the processor is configured to execute the methods in the above examples. Optionally, the chip also includes a memory, which is configured to store computer programs or code.

[0298] The present application also provides a processor for coupling with a memory, and for executing the methods and functions involving a network device or a terminal device in any of the above embodiments.

[0299] The present application provides a computer program product comprising instructions. When the computer program product is run on a computer, the method of the aforementioned embodiment is implemented.

[0300] The present application also provides a computer program. When the computer program is executed in a computer, the method of the aforementioned embodiment is implemented.

[0301] The present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a computer, the method described in the above embodiment is implemented.

[0302] Those skilled 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 design 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 beyond the scope of this application.

[0303] Those skilled in the art will 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.

[0304] In the several embodiments provided in this application, the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components being combined or integrated into another system, or some features being ignored or not implemented. In addition, the coupling or direct coupling or communication connection shown or discussed may be through some interface, and the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0305] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the technical solutions of the embodiments of the present application.

[0306] 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.

[0307] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of each method 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 ROM, a RAM, a magnetic disk, or an optical disk.

[0308] The above description is merely a specific embodiment of the present application, but the scope of protection of the embodiments of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the embodiments of the present application should be included in the scope of protection of the embodiments of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The apparatus applied to or located in the second network device includes: Receiving a first signal sent by a first terminal device on a first time domain resource and a first frequency domain resource, where the first signal is used to indicate that a second signal is sent or received between the first network device and the first terminal device on a second time domain resource and a second frequency domain resource; According to the first signal, signal transmission or reception between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources is determined.

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

3. The method according to claim 1 or 2, characterized in that The frequency range of the first frequency domain resources includes the frequency range of the second frequency domain resources.

4. The method according to any one of claims 1 to 3, characterized in that The first frequency domain resources include M first frequency domain resource grids, and the second frequency domain resources include N first frequency domain resource grids among the M first frequency domain resource grids, where N is less than or equal to M.

5. The method according to claim 4, characterized in that The first frequency domain resource grid is a detection granularity of the first signal, and the first frequency domain resource grid is a scheduling granularity of the second signal.

6. The method according to claim 3, characterized in that The first frequency domain resources include M first frequency domain resource grids, and the second frequency domain resources include L second frequency domain resource grids. The first frequency domain resource grid is the detection granularity of the first signal, and the second frequency domain resource grid is the scheduling granularity of the second signal.

7. The method according to claim 6, characterized in that Each of the M first frequency domain resource grids includes multiple second frequency domain resource grids.

8. The method according to claim 7, characterized in that There is a correspondence between different types of first signals carried on one first frequency domain resource grid and different numbers of second frequency domain resource grids.

9. The method according to any one of claims 1 to 8, characterized in that The determining of signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: Send first indication information, where the first indication information is used to indicate stopping or canceling the sending or receiving of the third signal between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

10. The method according to any one of claims 1 to 8, characterized in that Determining signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: Send second indication information, where the second indication information is used to indicate adjustment of the spatial transmission configuration of the third signal between the second network device and the second terminal device on the second frequency domain resources, wherein the spatial transmission configuration includes at least one of a precoding matrix, a spatial filter or a beam of the third signal.

11. The method according to any one of claims 1 to 8, characterized in that Determining signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: Determine not to send or receive signals between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

12. The method according to any one of claims 1 to 11, characterized in that The end time of the first time domain resource and the start time of the second time domain resource are separated by J time units, where J is a positive integer.

13. The method according to any one of claims 1 to 12, characterized in that The first time domain resource and the second time domain resource are included in a first time unit; or, the first time domain resource is included in a second time unit, and the second time domain resource includes multiple time units.

14. A communication method, characterized in that: An apparatus applied to a first terminal device or located in the first terminal device includes: Sending a first signal on a first time domain resource and a first frequency domain resource, where the first signal is used to indicate that a second signal is sent or received between the first network device and the first terminal device on a second time domain resource and a second frequency domain resource; The second signal is sent or received on the second time domain resource and the second frequency domain resource.

15. The method according to claim 14, characterized in that The method further comprises: In the third time domain resource, receiving third indication information sent by the first network device, the third indication information is used to indicate the A terminal device sends the first signal on the first time domain resource and the first frequency domain resource, and the third time domain resource is located before the first time domain resource.

16. The method according to claim 15, characterized in that The third indication information is carried in the first information, and the first information is used to schedule the second signal; or, the third indication information is also used to schedule the second signal.

17. The method according to any one of claims 14 to 16, characterized in that Within the second time domain resources, the second frequency domain resources are frequency domain resources in which the first terminal device does not expect to receive signals from network devices other than the first network device; or, within the second time domain resources, the first terminal device does not expect to receive signals from network devices other than the first network device on the second frequency domain resources.

18. A communication method, characterized in that: include: The first network device sends third indication information to the first terminal device, where the third indication information is used to instruct the first terminal device to send a first signal on a first time domain resource and a first frequency domain resource, and the first signal is used to indicate that a second signal is sent or received between the first network device and the first terminal device on a second time domain resource and a second frequency domain resource; The first terminal device sends the first signal on the first time domain resource and the first frequency domain resource according to the third indication information; The second network device receives the first signal sent by the first terminal device on the first time domain resources and the first frequency domain resources, and determines the signal sending or reception between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources based on the first signal.

19. The method according to claim 18, characterized in that The first network device sending the third indication information to the first terminal device includes: The first network device sends the third indication information to the first terminal device in a third time domain resource, and the third time domain resource is located before the first time domain resource.

20. The method according to claim 18 or 19, characterized in that The third indication information is carried by the first information, and the first information is used to schedule the second signal; or, the third indication information is also used to schedule the second signal.

21. The method according to any one of claims 18 to 20, characterized in that In the second time domain resource, the second frequency domain resource is a frequency domain resource in which the first terminal device does not expect to receive signals from other network devices other than the first network device; or, in the second time domain resource, the first terminal device does not expect to receive signals from other network devices other than the first network device on the second frequency domain resource.

22. The method according to any one of claims 18 to 21, characterized in that The second network device determines that the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: The second network device sends first indication information, where the first indication information is used to indicate stopping or canceling the sending or receiving of the third signal between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

23. The method according to any one of claims 18 to 21, characterized in that The second network device determines that the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: The second network device sends second indication information, and the second indication information is used to indicate adjustment of the spatial transmission configuration of the third signal between the second network device and the second terminal device on the second frequency domain resources, and the spatial transmission configuration includes at least one of the precoding matrix, spatial filter or beam of the third signal.

24. The method according to any one of claims 18 to 21, characterized in that The second network device determines that the signal transmission or reception between the second network device and the second terminal device on the second time domain resource and the second frequency domain resource is specifically: The second network device determines not to send or receive signals between the second network device and the second terminal device on the second time domain resources and the second frequency domain resources.

25. A communication device, characterized in that: include: A processor, wherein the processor is configured to execute a program or an instruction so that the apparatus performs the method according to any one of claims 1 to 13.

26. A communication device, characterized in that: include: A processor, wherein the processor is configured to execute a program or an instruction so that the apparatus performs the method according to any one of claims 14 to 17.

27. A communication system, characterized in that: Including the communication device according to claim 25 and the communication device according to claim 26.

28. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed on a computer, enables the computer to execute the method according to any one of claims 1 to 13 or the method according to any one of claims 14 to 17.

29. A computer program product, characterized in that The method comprises a computer program code, which, when executed, implements the method according to any one of claims 1 to 13 or the method according to any one of claims 14 to 17.

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