Beam transmission method, system, device, communication equipment, medium and product

Abstract

The present application relates to a beam transmission method, system, device, communication equipment, medium and product. The method is applied to an air-to-ground base station, including: sending a first ground SSB beam based on a first air-to-ground carrier, and sending an air SSB beam based on the first air-to-ground carrier, wherein the air SSB beam and the target ground SSB beam have different time domain positions and / or frequency domain positions, and the target ground SSB beam includes the first ground SSB beam and the second ground SSB beam sent by the ground base station based on the first ground carrier, and the first ground carrier and the first air-to-ground carrier have the same frequency domain position. The above method can be used to flexibly set the time domain position and / or frequency domain position of the air-to-ground base station sending the air SSB beam to be different from the time domain position and / or frequency domain position of the ground base station sending the second ground SSB beam, so that the time domain position and / or frequency domain position of the air-to-ground base station sending the air SSB beam and the ground base station sending the second ground SSB beam are staggered, so as to improve the performance of the air-to-ground network constructed based on the ground SSB beam and the air SSB beam.

Description

Technical Field

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

[0002] With the development of the low-altitude economy, aircraft are widely used in various civil fields. Therefore, it is necessary to build a low-altitude communication network to ensure the real-time transmission of aircraft flight control information and business data communication services.

[0003] In the related technology, the ground network and the air network, namely, air-ground networking, are mainly constructed by using the deployed cellular base stations to provide simultaneous three-dimensional air coverage and ground coverage.

[0004] However, the related technology has the problem of poor air-to-ground networking performance. Summary of the invention

[0005] Based on this, it is necessary to provide a beam transmission method, system, device, communication equipment, medium and product to address the above-mentioned technical problems, so as to enable the constructed air-to-ground network to have higher performance.

[0006] In a first aspect, an embodiment of the present application provides a beam transmission method, the method comprising:

[0007] The air-to-ground base station sends a first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier;

[0008] Among them, the time domain position of the air SSB beam and the target ground SSB beam are different and / or the frequency domain position is different, the target ground SSB beam includes a first ground SSB beam and a second ground SSB beam sent by the ground base station based on the first ground carrier, and the first ground carrier and the first air-to-ground carrier are located in the same frequency domain position; the air-to-ground SSB beam sent by the air-to-ground base station and the first ground SSB beam belong to the same cell.

[0009] In one embodiment, the method further comprises:

[0010] The air-to-ground base station periodically sends a third ground-to-ground SSB beam based on the second air-to-ground carrier;

[0011] The frequency domain position of the second air-to-ground carrier is different from that of the first air-to-ground carrier, and the frequency domain position of the second air-to-ground carrier is the same as that of the second ground carrier. The second ground carrier is used for the ground base station to periodically send a fourth ground SSB beam.

[0012] In one embodiment, an air-to-ground base station sends a first ground-to-ground SSB beam based on a first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, including:

[0013] The air-to-ground base station sends a first ground-to-ground SSB beam at a first time domain position based on a first air-to-ground carrier, and sends an air-to-air SSB beam at a second time domain position;

[0014] The first time domain position is the same as the time domain position at which the ground base station sends the second ground SSB beam based on the first ground carrier, and the ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position.

[0015] In one embodiment, an air-to-ground base station sends a first ground-to-ground SSB beam based on a first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, including:

[0016] The air-to-ground base station sends a first ground-to-ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, and sends an air-to-air SSB beam based on the air-to-ground sub-frequency domain;

[0017] Among them, the frequency domain position of the air-to-ground sub-frequency domain is different from the frequency domain position of the ground sub-frequency domain in the first ground carrier, and the ground sub-frequency domain is used for the ground base station to periodically send the second ground SSB beam.

[0018] In one embodiment, the air-to-ground base station sends a first ground-to-ground SSB beam based on an air-to-ground sub-frequency domain in a first air-to-ground carrier, and sends an air-to-air SSB beam based on the air-to-ground sub-frequency domain, including:

[0019] The air-to-ground base station sends a first ground-to-ground SSB beam at a third time domain position based on the air-to-ground sub-frequency domain, and sends an air-to-air SSB beam at a fourth time domain position based on the air-to-ground sub-frequency domain.

[0020] In a second aspect, an embodiment of the present application provides a beam sending device, the device comprising:

[0021] The ground base station sends a second ground SSB beam based on the first ground carrier;

[0022] Among them, the air-to-ground base station sends a first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, wherein the air-to-air SSB beam and the target ground-to-ground SSB beam have different time domain positions and / or frequency domain positions, and the target ground-to-ground SSB beam includes the first ground-to-ground SSB beam and the second ground-to-ground SSB beam; the air-to-air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell.

[0023] In one embodiment, the method further comprises:

[0024] The ground base station periodically sends a fourth ground SSB beam based on the second ground carrier;

[0025] Among them, the frequency domain position of the second ground carrier is different from that of the first ground carrier, and the frequency domain position of the second ground carrier is the same as that of the second air-to-ground carrier. The second air-to-ground carrier is used for the air-to-ground base station to periodically send a third ground SSB beam.

[0026] In one embodiment, the ground base station sends a second ground SSB beam based on the first ground carrier, including:

[0027] The ground base station sends a second ground SSB beam at a first time domain position based on the first ground carrier; wherein, at the second time domain position, the ground base station does not send a second ground SSB beam or an air SSB beam, and the second time domain position is used for the air-to-ground base station to send an air SSB beam.

[0028] In one embodiment, the ground base station sends a second ground SSB beam based on the first ground carrier, including:

[0029] The ground base station periodically sends a second ground SSB beam based on the ground sub-frequency domain in the first ground carrier;

[0030] Among them, the frequency domain positions of the ground sub-frequency domain and the air sub-frequency domain in the first air-to-ground carrier are different, and the air sub-frequency domain is used for the air-to-ground base station to send the first ground SSB beam and the air SSB beam.

[0031] In a third aspect, an embodiment of the present application further provides a communication system, the communication system comprising at least one air-to-ground base station and at least one ground-to-ground base station;

[0032] The above-mentioned air-to-ground base station is used to implement the steps of the method in any embodiment of the above-mentioned first aspect to form an air-to-ground network and a first ground-to-ground cellular mobile network;

[0033] The above-mentioned ground base station is used to implement the steps of the method in any embodiment of the above-mentioned second aspect to form a second ground cellular mobile network;

[0034] The first ground cellular mobile network and the second ground cellular mobile network have different coverage areas, and the air network, the first ground cellular mobile network and the second ground cellular mobile network form an air-ground network.

[0035] In a fourth aspect, an embodiment of the present application further provides a beam transmitting device, including:

[0036] A first sending module, configured to send a first ground-to-ground SSB beam based on a first air-to-ground carrier, and to send an air-to-air SSB beam based on the first air-to-ground carrier;

[0037] Among them, the time domain position of the air SSB beam and the target ground SSB beam are different and / or the frequency domain position is different, the target ground SSB beam includes a first ground SSB beam and a second ground SSB beam sent by the ground base station based on the first ground carrier, and the first ground carrier and the first air-to-ground carrier are located in the same frequency domain position; the air-to-ground SSB beam sent by the air-to-ground base station and the first ground SSB beam belong to the same cell.

[0038] In a fifth aspect, an embodiment of the present application further provides a beam sending device, including:

[0039] A second sending module, configured to send a second ground-to-ground SSB beam based on the first ground-to-ground carrier;

[0040] Among them, the air-to-ground base station sends a first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, wherein the air-to-air SSB beam and the target ground-to-ground SSB beam have different time domain positions and / or frequency domain positions, and the target ground-to-ground SSB beam includes the first ground-to-ground SSB beam and the second ground-to-ground SSB beam; the air-to-air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell.

[0041] In the sixth aspect, an embodiment of the present application further provides a communication device, which includes a transceiver, a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method of any one of the embodiments in the first aspect and the second aspect are implemented.

[0042] In the seventh aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method of any embodiment in the first aspect and the second aspect are implemented.

[0043] In an eighth aspect, an embodiment of the present application further provides a computer program product, the computer program product comprising a computer program, which, when executed by a processor, implements the steps of the method of any one of the embodiments of the first aspect and the second aspect.

[0044] The beam sending method, system, apparatus, communication equipment, medium and product provided in the embodiments of the present application are applied to air-to-ground base stations, including: sending a first ground-to-air SSB beam based on a first air-to-ground carrier, and sending an air-to-air SSB beam based on the first air-to-ground carrier, wherein the air-to-air SSB beam and the target ground-to-ground SSB beam have different time domain positions and / or frequency domain positions, the target ground-to-ground SSB beam includes the first ground-to-ground SSB beam and the second ground-to-ground SSB beam sent by the ground base station based on the first ground carrier, and the first ground carrier and the first air-to-ground carrier have the same frequency domain position; the air-to-air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell. The above method can be used to flexibly set the time domain position and / or frequency domain position of the air-to-ground base station sending the air SSB beam and the ground base station sending the second ground SSB beam to be different, so that the time domain position and / or frequency domain position of the air-to-ground base station sending the air SSB beam and the ground base station sending the second ground SSB beam are staggered, which can reduce the related interference caused by the radiated side lobes (upper side lobe and lower side lobe) when sending the air SSB beam and the second ground SSB beam, thereby improving the signal quality of the ground SSB beam and the air SSB beam sent by the air-to-ground base station and the ground base station, and on this basis, can improve the performance of the air-to-ground network constructed based on the ground SSB beam and the air SSB beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A diagram showing an application environment of a beam transmission method in an embodiment;

[0046] Figure 2 A schematic diagram of the deployment positions of each air-to-ground base station and each ground-to-ground base station in a communication system in one embodiment;

[0047] Figure 3 is a schematic diagram of a flow chart of a beam sending method in an embodiment;

[0048] Figure 4 It is a schematic diagram of the coverage of a single SSB beam and multiple SSB beams in an SSB beam transmission cycle in an embodiment;

[0049] Figure 5 is a schematic flow chart of a beam sending method in another embodiment;

[0050] Figure 6 A label diagram of co-channel interference existing in a conventional communication system in one embodiment;

[0051] Figure 7 A schematic diagram of the time-frequency relationship of an air-to-ground base station and a ground-to-ground base station sending corresponding SSB beams based on dual carriers in one embodiment;

[0052] Figure 8It is a schematic diagram of the time-frequency relationship of an air-to-ground base station and a ground-to-ground base station sending corresponding SSB beams based on dual carriers in another embodiment;

[0053] Fig. 9 is a schematic flow chart of a beam sending method in another embodiment;

[0054] Fig.10 is a schematic diagram of a flow chart of a beam sending method in an embodiment;

[0055] Fig.11 is a structural block diagram of a beam sending device in one embodiment;

[0056] Fig.12 is a structural block diagram of a beam transmitting device in another embodiment;

[0057] Fig.13 FIG. 4 is a diagram showing the internal structure of a communication device in one embodiment. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0059] In aircraft technology, aircraft are widely used in many civil fields such as consumer entertainment, logistics and transportation, agricultural meteorology, industrial production, geo-energy, smart cities, etc., showing advantages such as improving efficiency and reducing costs. However, with the rapid increase in the number of aircraft and their wide application needs, it is urgent to build a low-altitude network covering low altitudes to ensure the real-time transmission of aircraft flight control information and business data communication services. In practical applications, the ground cellular mobile network is mainly aimed at covering ground terminals (such as smart phones, personal computers, tablets, smart bracelets and other electronic devices), while the low-altitude network needs to achieve three-dimensional coverage of the air, especially the three-dimensional space of the airspace, which is quite different from the ground cellular mobile network to achieve two-dimensional plane coverage of the ground. At the same time, since the existing cellular base stations have achieved continuous coverage of the ground, how to achieve three-dimensional coverage of the low-altitude airspace based on the existing cellular base stations without affecting the continuous coverage of the ground has become an important issue. In the related art, there is a solution that can simultaneously build a ground cellular mobile network and a low-altitude network (i.e., air-to-ground networking) based on the existing cellular base stations. However, there is a problem of poor performance of the constructed air-to-ground networking in the related art. Based on this, an embodiment of the present application provides a beam sending method, which can enable the performance of the constructed air-to-ground network to be higher.

[0060] The beam transmission method provided in the embodiment of the present application can be applied to Figure 1The communication system shown in the figure includes multiple cellular base stations, each of which is pre-deployed. Among them, at least one of the multiple cellular base stations can be configured as an air-to-ground base station (for sending a ground synchronization broadcast block (Synchronization Signal / PBCH, SSB) beam and an air SSB beam), and the other cellular base stations can be configured as ground base stations. Figure 1 The example of a communication system including two air-to-ground base stations and four ground-to-ground base stations is used for illustration. Optionally, the number of air-to-ground base stations in the communication system can be determined based on the air coverage distance of each cellular base station, and each air-to-ground base station configured in the communication system can meet the requirements of continuous air coverage and air services; the number of ground base stations in the communication system can be determined based on the ground coverage distance of each cellular base station, and each ground base station configured in the communication system can meet the requirements of continuous ground coverage and ground services.

[0061] It should be noted here that there are various buildings and obstacles on the ground, while there are basically no obstructions in the air. The SSB beam coverage distance to the ground can be smaller than the coverage distance to the air. Correspondingly, the number of air-to-ground base stations in the communication system can be smaller than the number of ground base stations. For example, if the coverage range of the low-altitude network to be constructed is 3000m, and the coverage distance of each cellular base station is 300m, then a cellular base station can be selected as an air-to-ground base station at an interval of approximately 3000~6000m in the communication system, and the other cellular base stations can be used as ground base stations; if the coverage range of the low-altitude network to be constructed is 2000m, and the coverage distance of each cellular base station is 200m, then a cellular base station can be selected as an air-to-ground base station at an interval of 2000~4000m in the communication system, and the other cellular base stations can be used as ground base stations. Figure 2 The figure shows a schematic diagram of the deployment positions of two air-to-ground base stations and eight ground-to-ground base stations in a communication system under a scenario. Figure 2 The dotted box in the upper middle is the coverage of the low-altitude network, and the dotted box in the lower middle is the coverage of the ground cellular mobile network. The coverage of the low-altitude network includes two aircraft to be communicated (the embodiment of the present application is not limited to two), and the coverage of the ground cellular mobile network includes two ground terminals to be communicated (the embodiment of the present application is not limited to two), where: Figure 2 There are two air-to-ground base stations (i.e. 1 and 2), and the others are ground-to-ground base stations.

[0062] In actual applications, the ground base station can simultaneously send business signals, ground SSB signals, and control channel signals, etc. In an embodiment of the present application, in order to improve the performance of the constructed air-ground network, only the time domain position or frequency domain position of the ground SSB signal sent by the ground base station is flexibly set. At the same time, the air-to-ground base station can simultaneously send business signals, air SSB signals, ground SSB signals, and control channel signals, etc. In an embodiment of the present application, in order to improve the performance of the constructed air-ground network, only the time domain position or frequency domain position of the ground SSB signal and the air SSB signal sent by the air-to-ground base station is flexibly set. The specific process of the beam sending method will be specifically introduced in the following embodiments, and the specific process of the beam sending method will be introduced with the execution subject being any air-to-ground base station or any ground base station.

[0063] like Figure 3 As shown, it is a schematic diagram of the process of the beam sending method provided in an embodiment of the present application. The method is applied to any air-to-ground base station in a communication system and may include the following steps:

[0064] S101. An air-to-ground base station sends a first ground-to-ground SSB beam based on a first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier.

[0065] Among them, the time domain position of the air SSB beam and the target ground SSB beam are different and / or the frequency domain position is different, the target ground SSB beam includes a first ground SSB beam and a second ground SSB beam sent by the ground base station based on the first ground carrier, the first ground carrier and the first air-to-ground carrier are in the same frequency domain position, and the air-to-ground SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell.

[0066] It should be noted here that the first ground-to-ground SSB beam can be understood as the beam through which the air-to-ground base station sends the first ground-to-ground SSB signal; the air-to-air SSB beam can be understood as the beam through which the air-to-ground base station sends the air-to-air SSB signal.

[0067] Specifically, the air-to-ground base station sends a first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier. In practical applications, the time domain positions of the air-to-air SSB beam and the first ground-to-ground SSB beam may be different, and the frequency domain positions of the air-to-air SSB beam and the first ground-to-ground SSB beam are the same. At the same time, the time domain positions of the air-to-air SSB beam and the second ground-to-ground SSB beam may be the same or different, and the frequency domain positions of the air-to-air SSB beam and the second ground-to-ground SSB beam may be different or the same.

[0068] In practical applications, the air-to-ground base station can send the first ground SSB beam or the air SSB beam in turn. In a complete SSB beam transmission cycle, the air-to-ground base station can send the first ground SSB beam at multiple different time domain locations, and the coverage of all first ground SSB beams can include the coverage of the ground cellular mobile network to be constructed; at the same time, in a complete SSB beam transmission cycle, the air-to-ground base station can send the air SSB beam at multiple different time domain locations, and the coverage of all air SSB beams can include the coverage of the low-altitude network to be constructed.

[0069] Among them, within a complete SSB beam transmission cycle, the time domain length of the first ground-to-ground SSB beam sent by the air-to-ground base station and the time domain length of the air-to-ground base station sending the air-to-air SSB beam may be equal or unequal. The SSB beam here may include a ground-to-ground SSB beam and an air-to-air SSB beam; wherein, the ground-to-ground SSB beam is sent to the ground to cover a specific area on the ground (the ground here refers to the range between the horizontal plane and a certain height above the horizontal plane); the air-to-air SSB beam is sent to the air to cover a specific area in the air. In practical applications, the SSB beam transmission cycle is repetitive. At the same time, within a complete SSB beam transmission cycle, the time domain position of the first ground-to-ground SSB beam sent by the air-to-ground base station and the time domain position of the air-to-ground base station sending the air-to-air SSB beam can both be at least one.

[0070] Optionally, the above-mentioned SSB beam transmission period can be flexibly set according to the width of the SSB beam (SSB beam to the sky or SSB beam to the ground). If multiple SSB beams (SSB beam to the ground or SSB beam to the sky) are sent within one SSB beam transmission period, the multiple SSB beams sent need to meet the continuous coverage requirements of the ground cell or the ground cell airspace. Among them, within one SSB beam transmission period, the fewer the number of SSB beams, the larger the width of the corresponding ground SSB beam; the more the number of SSB beams, the smaller the width of the corresponding ground SSB beam. Among them, when multiple ground SSB beams are sent within one SSB beam transmission period, the time domain positions of sending each ground SSB beam are different, or, when multiple air SSB beams are sent within one SSB beam transmission period, the time domain positions of sending each air SSB beam are different.

[0071] like Figure 4 The figure shows the coverage of a single SSB beam and multiple SSB beams within one SSB beam transmission cycle. Figure 4Each ellipse represents an SSB beam, and the major axis of the ellipse represents the width of the SSB beam. If only 7 ground-to-ground SSB beams are transmitted in one SSB beam transmission cycle, then when m ground-to-space SSB beams are transmitted in one SSB beam transmission cycle, the width of each ground-to-space SSB beam may be greater than or equal to the total width of the 7 ground-to-ground SSB beams divided by m; if n ground-to-ground SSB beams are transmitted in one SSB beam transmission cycle, the width of each ground-to-ground SSB beam may be greater than or equal to the total width of the 7 ground-to-ground SSB beams divided by n.

[0072] In the embodiment of the present application, an example is taken in which a ground base station and an air-to-ground base station use a dual-carrier transmission method to send an air SSB beam and a ground SSB beam, wherein the dual carrier used by the ground base station includes a first ground carrier and a second ground carrier, and the dual carrier used by the air-to-ground base station includes a first air-to-ground carrier and a second air-to-ground carrier.

[0073] In addition, the ground base station and the air-to-ground base station can use a multi-carrier transmission method to send air-to-air SSB beams and ground-to-air SSB beams to build an air-to-ground network. In this case, the first ground carrier can be any ground carrier, and the first air-to-ground carrier can be any air-to-ground carrier.

[0074] Optionally, the time domain positions at which the above-mentioned air-to-ground base station sends the first ground-to-ground SSB beam can be set adjacently or at intervals; the time domain positions at which the above-mentioned air-to-ground base station sends the air SSB beam can also be set adjacently or at intervals. Optionally, the time domain lengths corresponding to different time domain positions can be equal or unequal, which is not limited in the embodiments of the present application.

[0075] It should be noted here that the coverage range of the first ground-to-ground SSB beam sent by the air-to-ground base station is different from the coverage range of the air-to-air SSB beam. Optionally, the coverage range of the first ground-to-ground SSB beam sent by the air-to-ground base station and the coverage range of the second ground-to-ground SSB beam sent by the ground base station may be the same or different. Of course, the coverage ranges of the two may intersect. In addition, within a complete SSB beam transmission cycle, the coverage range of the first ground-to-ground SSB beam sent by the air-to-ground base station at different time domain positions may be the same, different or intersecting; the coverage range of the air-to-ground base station sending the air SSB beam at different time domain positions may be the same, different or intersecting. At the same time, within a complete SSB beam transmission cycle, the coverage range of the second ground-to-ground SSB beam sent by the ground base station at different time domain positions may be the same, different or intersecting, and this is not limited in the embodiments of the present application.

[0076] In an embodiment of the present application, the steps in S101 and the step of transmitting the second ground SSB beam based on the first ground carrier by the ground base station can be performed synchronously. The ground base station can transmit the cell information based on the first ground SSB beam by using a horizontal multi-beam scanning method; the ground base station can transmit the cell information based on the second ground SSB beam by using a horizontal multi-beam scanning method.

[0077] According to the technical solution in the embodiment of the present application, the air-to-ground base station sends a first ground SSB beam based on the first air-to-ground carrier, and sends an air SSB beam based on the first air-to-ground carrier, wherein the air SSB beam and the target ground SSB beam have different time domain positions and / or frequency domain positions, the target ground SSB beam includes the first ground SSB beam and the second ground SSB beam sent by the ground base station based on the first ground carrier, the first ground carrier and the first air-to-ground carrier have the same frequency domain position, and the air SSB beam sent by the air-to-ground base station and the first ground SSB beam belong to the same cell; the above method can flexibly set the air-to-ground base station to send air The time domain position and / or frequency domain position of the SSB beam and the second ground SSB beam sent by the ground base station are different, so that the time domain position and / or frequency domain position of the air-to-ground base station sending the air SSB beam and the ground base station sending the second ground SSB beam are staggered, which can reduce the related interference caused by the radiated side lobes (upper side lobe and lower side lobe) when sending the air SSB beam and the second ground SSB beam, thereby improving the signal quality of the ground SSB beam and the air SSB beam sent by the air-to-ground base station and the ground base station, and on this basis, can improve the performance of the air-to-ground network constructed based on the ground SSB beam and the air SSB beam.

[0078] In practical applications, the air-to-ground base station in the communication system can send a ground SSB beam based on another carrier, so that even if a part of the cellular base stations in the beam system are configured as air-to-ground base stations, it is possible to ensure that these air-to-ground base stations build a ground cellular mobile network with continuous coverage, thereby avoiding affecting the performance of the ground cellular mobile network. The process of sending a ground SSB beam by a ground base station is described below. In one embodiment, Figure 5 As shown, while executing the step in S101 above, the method may further include the following steps:

[0079] S102. The air-to-ground base station periodically sends a third ground-to-ground SSB beam based on the second air-to-ground carrier.

[0080] Among them, the frequency domain position of the second air-to-ground carrier is different from that of the first air-to-ground carrier, and the frequency domain position of the second air-to-ground carrier is the same as that of the second ground carrier. The second ground carrier is used for the ground base station to periodically send a fourth ground SSB beam.

[0081] Specifically, the air-to-ground base station can use narrow beam beamforming technology to periodically send the third ground SSB beam based on the second air-to-ground carrier, that is, the third ground SSB beam is sent in turn based on the second air-to-ground carrier. At the same time, the ground base station can use narrow beam beamforming technology to periodically send the fourth ground SSB beam based on the second ground carrier.

[0082] Among them, within a complete SSB beam transmission cycle, the air-to-ground base station can transmit a third ground-to-ground SSB beam at multiple different time domain locations, and the coverage of all third ground-to-ground SSB beams can include the coverage of the ground-to-ground cellular mobile network to be constructed. At the same time, within a complete SSB beam transmission cycle, the ground-to-ground base station can transmit a fourth ground-to-ground SSB beam at multiple different time domain locations, and the coverage of all fourth ground-to-ground SSB beams can include the coverage of the ground-to-ground cellular mobile network to be constructed.

[0083] In practical applications, the frequency domain positions of the second air-to-ground carrier and the first air-to-ground carrier are different, and the frequency domain positions of the second air-to-ground carrier and the second ground carrier are the same. At the same time, each time domain position at which the air-to-ground base station sends the third ground SSB beam is different, and the time domain lengths corresponding to each time domain position at which the air-to-ground base station sends the third ground SSB beam may be equal or unequal, which is not limited in the embodiments of the present application.

[0084] In addition, the coverage range of the fourth ground SSB beam sent by the ground base station may be the same as or different from the coverage range of the first ground SSB beam sent by the air-to-ground base station. Of course, the coverage ranges of the two may intersect. Optionally, within a complete SSB beam transmission cycle, the ground base station may send a fourth ground SSB beam at multiple different time domain locations, and the coverage range of all fourth ground SSB beams may include the coverage range of the ground cellular mobile network to be constructed.

[0085] In the embodiment of the present application, the steps in S101 and S102 can be executed synchronously. Meanwhile, the steps in S102 and the step of transmitting the fourth ground SSB beam based on the second ground carrier by the ground base station can be executed synchronously.

[0086] In addition, the above-mentioned third ground-to-ground SSB beam can be understood as the beam through which the air-to-ground base station sends the third ground-to-ground SSB signal; the fourth ground-to-ground SSB beam can be understood as the beam through which the ground-to-ground base station sends the fourth ground-to-ground SSB signal.

[0087] According to the technical solution in the embodiment of the present application, the air-to-ground base station periodically sends a third ground SSB beam based on the second air-to-ground carrier, wherein the second air-to-ground carrier is located at a different frequency domain position from the first air-to-ground carrier, and the second air-to-ground carrier is located at the same frequency domain position as the second ground carrier, and the second ground carrier is used for the ground base station to periodically send a fourth ground SSB beam; the above method can periodically send a third ground SSB beam based on the second air-to-ground carrier, so that the air-to-ground base station can provide both air coverage and ground coverage, that is, the air-to-ground base station can build a low-altitude network and can also build a ground cellular mobile network by sending a third ground SSB beam, thereby avoiding the performance of the ground cellular mobile network built by the ground base station being affected by the configuration of some cellular base stations as air-to-ground base stations.

[0088] In some scenarios, interference can be reduced by staggering the time domain positions of the air-to-ground base station sending the air SSB beam and the ground base station sending the ground SSB beam, so as to improve the performance of the constructed air-to-ground network. The following describes a method that can be adopted in the process of the above-mentioned air-to-ground base station sending the first ground SSB beam based on the first air-to-ground carrier and sending the air SSB beam based on the first air-to-ground carrier. In one embodiment, the steps in S101 above may include: the air-to-ground base station sends the first ground SSB beam at a first time domain position based on the first air-to-ground carrier, and sends the air SSB beam at a second time domain position.

[0089] The first time domain position is the same as the time domain position at which the ground base station sends the second ground SSB beam based on the first ground carrier, and the ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position.

[0090] In practical applications, a complete SSB beam transmission cycle may include at least one first time domain position and at least one second time domain position. If a complete SSB beam transmission cycle includes multiple first time domain positions and multiple second time domain positions, then the multiple first time domain positions may be set adjacent to each other, and the multiple second time domain positions may be set adjacent to each other. In addition, at least two of the multiple first time domain positions may be set at intervals, and at least two time domain positions may be set between the at least two first time domain positions.

[0091] In an embodiment of the present application, an example is taken in which a complete SSB beam transmission cycle includes a first time domain position and a second time domain position. Specifically, the air-to-ground base station can send a first ground-to-ground SSB beam at the first time domain position based on the first air-to-ground carrier, and send an air-to-air SSB beam at the second time domain position.

[0092] It should be noted here that when the air-to-ground base station and the ground-to-ground base station send SSB beams (ground-to-ground SSB beams or air-to-ground SSB beams), there are side lobes (upper side lobes and lower side lobes). The upper side lobe can be sent to the air and the lower side lobe can be sent to the ground. Therefore, there may be co-frequency interference between the ground-to-ground cellular mobile network and the low-altitude network.

[0093] In an embodiment of the present application, when the air-to-ground base station sends an air SSB beam at a second time domain position based on the first air-to-ground carrier, the ground base station does not send a second ground SSB beam or an air SSB beam at the second time domain position. In this way, the time domain positions of the air-to-ground SSB beam sent by the air-to-ground base station and the second ground SSB beam sent by the ground base station can be staggered, thereby reducing the related interference caused by the side lobes existing when the air-to-ground base station and the ground base station send SSB beams (ground SSB beams or air-to-ground SSB beams), that is, reducing the co-frequency interference of the air SSB beam sent by the air-to-ground base station.

[0094] The above-mentioned related interference may include the interference of the upper side lobe of the downlink signal sent by the ground base station to the ground terminal on the downlink signal of the aircraft (i.e. the interference of the downlink signal of the ground terminal on the downlink signal of the aircraft), the upper side lobe of the uplink signal sent by the aircraft to the air-to-ground base station entering the uplink signal of the ground base station and causing interference to the uplink signal of the ground base station (i.e. the interference of the uplink signal of the aircraft on the uplink signal of the ground base station), the lower side lobe of the downlink signal sent by the air-to-ground base station to the aircraft and causing interference to the downlink signal of the ground terminal (i.e. the interference of the downlink signal of the air-to-ground base station on the downlink signal of the ground terminal), and the lower side lobe of the uplink signal sent by the ground terminal to the ground base station entering the uplink signal of the air-to-ground base station and causing interference to the uplink signal of the aircraft (i.e. the interference of the uplink signal of the ground terminal on the uplink signal of the aircraft). Figure 6 The figure shows a schematic diagram of co-channel interference in a conventional communication system, wherein the conventional communication system may be the same as the communication system in the embodiment of the present application, but the beam transmission modes performed by the air-to-ground base station and the ground-to-ground base station are different, wherein: Figure 6 The shaded small ovals in the figure represent the upper or lower side lobes.

[0095] like Figure 7 The figure shows a schematic diagram of a time domain position staggered scenario in which, within a complete SSB beam transmission cycle, an air-to-ground base station sends a first ground SSB beam and an air SSB beam based on a first air-to-ground carrier and periodically sends a third ground SSB beam based on a second air-to-ground carrier, and a ground base station sends a second ground SSB beam based on the first ground carrier and periodically sends a fourth ground SSB beam based on the second ground carrier.

[0096] In the technical solution in the embodiment of the present application, the air-to-ground base station sends a first ground SSB beam based on the first air-to-ground carrier at a first time domain position, and sends an air SSB beam at a second time domain position, wherein the first time domain position is the same as the time domain position at which the ground base station sends the second ground SSB beam based on the first ground carrier, and the ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position; the above method can be used when the air-to-ground base station sends the air SSB beam at the second time domain position based on the first air-to-ground carrier. The ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position, so that the time domain position of the air-to-ground SSB beam sent by the air-to-ground base station and the second ground SSB beam sent by the ground base station are staggered, which can reduce the co-channel interference of the air-to-ground SSB beam sent by the air-to-ground base station, thereby improving the signal quality of the ground SSB beam and the air SSB beam sent by the air-to-ground base station and the ground base station, and on this basis, can improve the performance of the air-to-ground network constructed based on the ground SSB beam and the air SSB beam.

[0097] In other scenarios, interference can be reduced by staggering the frequency domain positions of the air-to-ground base station sending the air SSB beam and the ground base station sending the second ground SSB beam, so as to improve the performance of the constructed air-to-ground network. The following describes another method that can be adopted in the process of the above-mentioned air-to-ground base station sending the first ground SSB beam based on the first air-to-ground carrier and sending the air SSB beam based on the first air-to-ground carrier. In one embodiment, the steps in S101 above may include: the air-to-ground base station sends the first ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, and sends the air SSB beam based on the air-to-ground sub-frequency domain.

[0098] Among them, the frequency domain position of the air-to-ground sub-frequency domain is different from the frequency domain position of the ground sub-frequency domain in the first ground carrier, and the ground sub-frequency domain is used for the ground base station to periodically send the second ground SSB beam.

[0099] In practical applications, the first air-to-ground carrier may include multiple air-to-ground sub-frequency domains at different frequency domain positions. Specifically, the air-to-ground base station may send a first ground-to-ground SSB beam based on any air-to-ground sub-frequency domain in the first air-to-ground carrier, and send an air-to-air SSB beam based on the air-to-ground sub-frequency domain.

[0100] At the same time, the first ground-to-ground carrier may include multiple ground-to-ground sub-frequency domains with different frequency domain positions, and the ground base station may select any ground-to-ground sub-frequency domain with a frequency domain position different from the air-to-ground sub-frequency domain to send the second ground SSB beam.

[0101] In an embodiment of the present application, the frequency domain position of the air-to-ground sub-frequency domain and the frequency domain position of the ground sub-frequency domain in the first ground carrier may be different. This can ensure that even if the time domain position of the air-to-ground base station sending the first ground SSB beam is the same as the time domain position of the ground base station sending the second ground SSB beam, it can ensure that the air-to-ground base station sends the first ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, which is staggered with the frequency domain position of the ground base station sending the second ground SSB beam based on the ground sub-frequency domain in the first ground carrier. This can also reduce interference.

[0102] like Figure 8 It is a schematic diagram showing that in a frequency domain position staggered scenario, within a complete SSB beam transmission cycle, the air-to-ground base station transmits the first ground SSB beam and the air SSB beam based on the air-to-ground sub-frequency domain s1 in the first air-to-ground carrier and periodically sends the third ground SSB beam based on the second air-to-ground carrier, and the ground base station transmits the second ground SSB beam based on the ground sub-frequency domain s2 in the first ground carrier and periodically sends the fourth ground SSB beam based on the second ground carrier.

[0103] According to the technical solution in the embodiment of the present application, the air-to-ground base station sends a first ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, and sends an air SSB beam based on the air-to-ground sub-frequency domain, wherein the frequency domain position of the air-to-ground sub-frequency domain is different from the frequency domain position of the ground sub-frequency domain in the first ground carrier, and the ground sub-frequency domain is used for the ground base station to periodically send a second ground SSB beam; the above method can ensure that the air-to-ground base station sends the second ground SSB beam based on the frequency domain position of the air-to-ground sub-frequency domain in the first air-to-ground carrier and the ground sub-frequency domain The frequency domain positions are different, so that the air-to-ground base station sends the first ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, which is staggered with the frequency domain position of the ground base station sending the second ground SSB beam based on the ground sub-frequency domain in the first ground carrier. This can reduce the co-channel interference of the air-to-air SSB beam sent by the air-to-ground base station, thereby improving the signal quality of the ground SSB beam and the air SSB beam sent by the air-to-ground base station and the ground base station, and on this basis, can improve the performance of the air-to-ground network constructed based on the ground SSB beam and the air SSB beam.

[0104] In one embodiment, the above-mentioned air-to-ground base station sends a first ground-to-ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, and the step of sending an air-to-air SSB beam based on the air-to-ground sub-frequency domain may include: the air-to-ground base station sends the first ground-to-ground SSB beam at a third time domain position based on the air-to-ground sub-frequency domain, and sends an air-to-air SSB beam at a fourth time domain position based on the air-to-ground sub-frequency domain.

[0105] Among them, the third time domain position is the same as the fifth time domain position at which the ground base station sends the second ground SSB beam based on the ground sub-frequency domain in the first ground carrier. At the same time, the ground base station can also send the second ground SSB beam at the fifth time domain position based on the ground sub-frequency domain, and the fifth time domain position is the same as the fourth time domain position.

[0106] In practical applications, a complete SSB beam transmission cycle may include at least one third time domain position and at least one fourth time domain position. If a complete SSB beam transmission cycle includes multiple third time domain positions and multiple fourth time domain positions, then the multiple third time domain positions may be set adjacent to each other, and the multiple fourth time domain positions may be set adjacent to each other. In addition, at least two of the multiple third time domain positions may be set at intervals.

[0107] In an embodiment of the present application, an example is taken in which a complete SSB beam transmission cycle includes a third time domain position and a fourth time domain position. Specifically, the air-to-ground base station can send a first ground-to-ground SSB beam at the third time domain position based on the air-to-ground sub-frequency domain, and send an air-to-air SSB beam at the fourth time domain position.

[0108] According to the technical solution in the embodiment of the present application, the air-to-ground base station sends a first ground SSB beam at a third time domain position based on the air-to-ground sub-frequency domain, and sends an air SSB beam at a fourth time domain position based on the air-to-ground sub-frequency domain; the above method can be based on the frequency domain position of the air-to-ground sub-frequency domain in the first air-to-ground carrier of the air-to-ground base station, which is different from the frequency domain position of the ground sub-frequency domain where the ground base station sends the second ground SSB beam. Even if the third time domain position is configured to be the same as the time domain position where the ground base station sends the second ground SSB beam based on the ground sub-frequency domain, the co-channel interference of the air-to-air SSB beam sent by the air-to-ground base station can be reduced, thereby improving the signal quality of the ground SSB beam and the air SSB beam sent by the air-to-ground base station and the ground base station, and on this basis, the performance of the air-to-ground networking constructed based on the ground SSB beam and the air SSB beam can be improved.

[0109] In one embodiment, the embodiment of the present application further provides a beam transmission method, which is applied to an air-to-ground base station. The method includes the following process:

[0110] (1) The air-to-ground base station sends a first ground-to-ground SSB beam based on a first air-to-ground carrier, sends an air-to-air SSB beam based on the first air-to-ground carrier, and periodically sends a third ground-to-ground SSB beam based on a second air-to-ground carrier; the air-to-air SSB beam sent by the air-to-ground base station and the first ground-to-air SSB beam belong to the same cell;

[0111] The time domain position of the air SSB beam and the target ground SSB beam are different and / or the frequency domain position is different. The target ground SSB beam includes a first ground SSB beam and a second ground SSB beam sent by the ground base station based on the first ground carrier. The first ground carrier and the first air-to-ground carrier are located at the same frequency domain position. The second air-to-ground carrier and the first air-to-ground carrier are located at different frequency domain positions, and the second air-to-ground carrier and the second ground carrier are located at the same frequency domain position. The second ground carrier is used for the ground base station to periodically send a fourth ground SSB beam.

[0112] The air-to-ground base station in the above step (1) sends the first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends the air-to-air SSB beam based on the first air-to-ground carrier, which can be implemented in two ways:

[0113] The first method includes:

[0114] The air-to-ground base station sends a first ground-to-ground SSB beam at a first time domain position based on a first air-to-ground carrier, and sends an air-to-air SSB beam at a second time domain position;

[0115] The first time domain position is the same as the time domain position at which the ground base station sends the second ground SSB beam based on the first ground carrier, and the ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position;

[0116] The second method includes:

[0117] The air-to-ground base station sends a first ground-to-ground SSB beam at a third time domain position based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, and sends an air-to-air SSB beam at a fourth time domain position based on the air-to-ground sub-frequency domain;

[0118] Among them, the frequency domain position of the air-to-ground sub-frequency domain is different from the frequency domain position of the ground sub-frequency domain in the first ground carrier, and the ground sub-frequency domain is used for the ground base station to periodically send the second ground SSB beam.

[0119] The execution process of the above step (1) can be specifically referred to the description of the above embodiment. The implementation principle and technical effect are similar and will not be described in detail here.

[0120] like Fig. 9 As shown, it is a schematic diagram of the process of the beam sending method provided in an embodiment of the present application. The method is applied to any ground base station in a communication system and may include the following steps:

[0121] S201. The ground base station sends a second ground SSB beam based on the first ground carrier.

[0122] Among them, the air-to-ground base station sends a first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, wherein the air-to-air SSB beam and the target ground-to-ground SSB beam have different time domain positions and / or frequency domain positions, the target ground-to-ground SSB beam includes the first ground-to-ground SSB beam and the second ground-to-ground SSB beam, and the air-to-air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell.

[0123] In actual applications, the air-to-ground base station sends a first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier. Optionally, the time domain position of the air-to-air SSB beam and the first ground-to-ground SSB beam may be different, and the frequency domain position of the air-to-air SSB beam and the first ground-to-ground SSB beam is the same. At the same time, the time domain position of the air-to-air SSB beam and the second ground-to-ground SSB beam may be the same or different, and the frequency domain position of the air-to-air SSB beam and the second ground-to-ground SSB beam may be different or the same. Optionally, the above-mentioned second ground-to-ground SSB beam may be understood as a beam for the ground base station to send a second ground-to-ground SSB signal.

[0124] Specifically, the ground base station can send the second ground SSB beam in turn based on the first ground carrier, and at the same time, the air-to-ground base station can send the first ground SSB beam or the air SSB beam in turn. The duration of one rotation can be equal to a completed SSB beam transmission cycle. It should be noted here that the sending of the second ground SSB beam by the ground base station and the sending of the first ground SSB beam or the air SSB beam by the air-to-ground base station can be performed synchronously.

[0125] During a complete SSB beam transmission cycle, the air-to-ground base station can send the first ground-to-ground SSB beam at multiple different time domain locations, and the coverage range of all first ground-to-ground SSB beams can include the coverage range of the ground cellular mobile network to be constructed; at the same time, during a complete SSB beam transmission cycle, the air-to-ground base station can send the air-to-air SSB beam at multiple different time domain locations, and the coverage range of all air-to-air SSB beams can include the coverage range of the low-altitude network to be constructed.

[0126] Among them, within a complete SSB beam transmission cycle, the time domain length of the first ground-to-ground SSB beam sent by the air-to-ground base station and the time domain length of the air-to-ground base station sending the air-to-air SSB beam may be equal or unequal. The SSB beam here may include a ground-to-ground SSB beam and an air-to-air SSB beam; wherein, the ground-to-ground SSB beam is sent to the ground to cover a specific area on the ground (the ground here refers to the range between the horizontal plane and a certain height above the horizontal plane); the air-to-air SSB beam is sent to the air to cover a specific area in the air. In practical applications, the SSB beam transmission cycle is repetitive. At the same time, within a complete SSB beam transmission cycle, the time domain position of the first ground-to-ground SSB beam sent by the air-to-ground base station and the time domain position of the air-to-ground base station sending the air-to-air SSB beam can both be at least one.

[0127] Optionally, the time domain positions at which the above-mentioned air-to-ground base station sends the first ground-to-ground SSB beam can be set adjacently or at intervals; the time domain positions at which the above-mentioned air-to-ground base station sends the air SSB beam can also be set adjacently or at intervals. Optionally, the time domain lengths corresponding to different time domain positions can be equal or unequal, which is not limited in the embodiments of the present application.

[0128] It should be noted here that the coverage range of the first ground-to-ground SSB beam sent by the air-to-ground base station is different from the coverage range of the air-to-air SSB beam. Optionally, the coverage range of the first ground-to-ground SSB beam sent by the air-to-ground base station and the coverage range of the second ground-to-ground SSB beam sent by the ground base station may be the same or different. Of course, the coverage ranges of the two may intersect. In addition, within a complete SSB beam transmission cycle, the coverage range of the first ground-to-ground SSB beam sent by the air-to-ground base station at different time domain positions may be the same, different or intersecting; the coverage range of the air-to-ground base station sending the air SSB beam at different time domain positions may be the same, different or intersecting. At the same time, within a complete SSB beam transmission cycle, the coverage range of the second ground-to-ground SSB beam sent by the ground base station at different time domain positions may be the same, different or intersecting, and this is not limited in the embodiments of the present application.

[0129] According to the technical solution in the embodiment of the present application, the ground base station sends a second ground SSB beam based on the first ground carrier, wherein the air-to-ground base station sends the first ground SSB beam based on the first air-to-ground carrier, and sends the air SSB beam based on the first air-to-ground carrier, wherein the air SSB beam and the target ground SSB beam have different time domain positions and / or frequency domain positions, and the target ground SSB beam includes the first ground SSB beam and the second ground SSB beam, and the air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell; the above method can flexibly set the ground base station to send the second ground SSB The time domain position and / or frequency domain position of the beam and the air-to-ground base station sending the air SSB beam are different, so that the time domain position and / or frequency domain position of the ground base station sending the second ground SSB beam and the air-to-ground base station sending the air SSB beam are staggered, which can reduce the related interference caused by the radiated side lobes (upper side lobe and lower side lobe) when sending the air SSB beam and the second ground SSB beam, thereby improving the signal quality of the ground SSB beam and the air SSB beam sent by the air-to-ground base station and the ground base station, and on this basis, can improve the performance of the air-to-ground network constructed based on the ground SSB beam and the air SSB beam.

[0130] In practical applications, the air-to-ground base station in the communication system can continuously send the ground SSB beam based on another carrier, so that even if a part of the cellular base stations in the beam system are configured as air-to-ground base stations, it is ensured that these air-to-ground base stations can also build a ground cellular mobile network with continuous coverage, avoiding affecting the performance of the ground cellular mobile network. The process of sending the ground SSB beam by the ground base station will be described below. In one embodiment, Fig.10 As shown, while executing the step in S201 above, the method may further include the following steps:

[0131] S202. The ground base station periodically sends a fourth ground SSB beam based on the second ground carrier.

[0132] Among them, the frequency domain position of the second ground carrier is different from that of the first ground carrier, and the frequency domain position of the second ground carrier is the same as that of the second air-to-ground carrier. The second air-to-ground carrier is used for the air-to-ground base station to periodically send a third ground SSB beam.

[0133] Specifically, the ground base station can use narrow beam beamforming technology to periodically send the fourth ground SSB beam based on the second ground carrier, that is, the fourth ground SSB beam is sent in turn based on the second ground carrier. At the same time, the air-to-ground base station can use narrow beam beamforming technology to periodically send the third ground SSB beam based on the second air-to-ground carrier.

[0134] Among them, within a complete SSB beam transmission cycle, the ground base station can transmit the fourth ground SSB beam at multiple different time domain positions, and the coverage of all fourth ground SSB beams can include the coverage of the ground cellular mobile network to be constructed. At the same time, within a complete SSB beam transmission cycle, the air-to-ground base station can transmit the third ground SSB beam at multiple different time domain positions, and the coverage of all third ground SSB beams can include the coverage of the ground cellular mobile network to be constructed.

[0135] In actual applications, the frequency domain positions of the second ground carrier and the first ground carrier are different, and the frequency domain positions of the second air-to-ground carrier and the second ground carrier are the same. Optionally, each time domain position at which the ground base station sends the fourth ground SSB beam is different, and the time domain length corresponding to each time domain position at which the ground base station sends the fourth ground SSB beam may be equal or unequal, which is not limited in this embodiment of the present application. At the same time, each time domain position at which the air-to-ground base station sends the third ground SSB beam is different, and the time domain length corresponding to each time domain position at which the air-to-ground base station sends the third ground SSB beam may be equal or unequal, which is not limited in this embodiment of the present application.

[0136] In addition, the coverage range of the fourth ground SSB beam sent by the ground base station may be the same as or different from the coverage range of the first ground SSB beam sent by the air-to-ground base station. Of course, the coverage ranges of the two may intersect. Optionally, within a complete SSB beam transmission cycle, the ground base station may send a fourth ground SSB beam at multiple different time domain locations, and the coverage range of all fourth ground SSB beams may include the coverage range of the mobile cellular network to be constructed.

[0137] In the embodiment of the present application, the steps in S102 and S101 can be executed synchronously. Meanwhile, the steps in S102 and the step of transmitting the fourth ground-to-ground SSB beam by the ground base station based on the second ground-to-ground carrier can be executed synchronously.

[0138] According to the technical solution in the embodiment of the present application, the ground base station periodically sends a fourth ground SSB beam based on the second ground carrier, wherein the second ground carrier is located at a different frequency domain position from the first ground carrier, and the second ground carrier is located at the same frequency domain position as the second air-to-ground carrier, and the second air-to-ground carrier is used for the air-to-ground base station to periodically send a third ground SSB beam; the above method can periodically send a fourth ground SSB beam based on the second ground carrier, so that when the air-to-ground base station can build a low-altitude network, the ground base station can guarantee the sent ground SSB beam, that is, guarantee the performance of the constructed ground cellular mobile network.

[0139] In some scenarios, interference can be reduced by staggering the time domain positions of the ground base station sending the ground SSB beam and the air-to-ground base station sending the air SSB beam, so as to improve the performance of the constructed air-to-ground network. The following is a description of a method that can be adopted for the process of the ground base station sending the second ground SSB beam based on the first ground carrier. In one embodiment, the steps in S201 above may include: the ground base station sends the second ground SSB beam at a first time domain position based on the first ground carrier.

[0140] Among them, at the second time domain position, the ground base station does not send the second ground SSB beam or the air SSB beam, and the second time domain position is used for the air-to-ground base station to send the air SSB beam.

[0141] In practical applications, a complete SSB beam transmission cycle may include at least one first time domain position and at least one second time domain position. If a complete SSB beam transmission cycle includes multiple first time domain positions and multiple second time domain positions, then the multiple first time domain positions may be set adjacent to each other, and the multiple second time domain positions may be set adjacent to each other. In addition, at least two of the multiple first time domain positions may be set at intervals.

[0142] Here, an example is taken in which a complete SSB beam transmission cycle includes a first time domain position and a second time domain position. Specifically, the ground base station can transmit the second ground SSB beam at the first time domain position based on the first air-to-ground carrier.

[0143] In an embodiment of the present application, the ground base station does not send a second ground SSB beam or an air SSB beam at a second time domain position to ensure that when the air-to-ground base station sends an air SSB beam at a second time domain position based on the first air-to-ground carrier, the time domain position of the air SSB beam sent by the air-to-ground base station and the second ground SSB beam sent by the ground base station can be staggered.

[0144] According to the technical solution in the embodiment of the present application, the ground base station sends a second ground SSB beam at a first time domain position based on the first ground carrier, wherein the ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position, and the second time domain position is used for the air-to-ground base station to send the air SSB beam; the above method can be used when the air-to-ground base station sends the air SSB beam at the second time domain position based on the first air-to-ground carrier, the ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position, so that the time domain position of the air-to-ground SSB beam sent by the air-to-ground base station and the second ground SSB beam sent by the ground base station are staggered, which can reduce the co-frequency interference of the air SSB beam sent by the air-to-ground base station, thereby improving the signal quality of the ground SSB beam and the air SSB beam sent by the air-to-ground base station and the ground base station, and on this basis, it can improve the performance of the air-to-ground networking constructed based on the ground SSB beam and the air SSB beam.

[0145] In other scenarios, interference can be reduced by staggering the frequency domain positions of the second ground SSB beam sent by the ground base station and the air-to-ground base station in sending the air SSB beam, so as to improve the performance of the constructed air-to-ground network. The following describes another method that can be adopted in the process of the ground base station sending the second ground SSB beam based on the first ground carrier. In one embodiment, the steps in S201 above may include: the ground base station periodically sends the second ground SSB beam based on the ground sub-frequency domain in the first ground carrier.

[0146] Among them, the frequency domain positions of the ground sub-frequency domain and the air sub-frequency domain in the first air-to-ground carrier are different, and the air sub-frequency domain is used for the air-to-ground base station to send the first ground SSB beam and the air SSB beam.

[0147] In practical applications, the first air-to-ground carrier may include multiple air-to-ground sub-frequency domains at different frequency domain positions. Specifically, the ground base station may send the second ground SSB beam based on any ground sub-frequency domain in the first ground carrier.

[0148] At the same time, the first air-to-ground carrier may include multiple air-to-ground sub-frequency domains with different frequency domain positions. The air-to-ground base station may select any air-to-ground sub-frequency domain with a frequency domain position different from the ground sub-frequency domain to send the first ground-to-ground SSB beam and the air-to-ground SSB beam.

[0149] In an embodiment of the present application, the frequency domain position of the ground sub-frequency domain in the first ground carrier and the frequency domain position of the air-to-ground sub-frequency domain may be different. This can ensure that even if the time domain position of the air-to-ground base station sending the first ground SSB beam is the same as the time domain position of the ground base station sending the second ground SSB beam, the ground base station can ensure that the second ground SSB beam sent by the ground base station based on the ground sub-frequency domain in the first ground carrier is staggered with the frequency domain position of the air-to-ground base station sending the first ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, which can also reduce interference.

[0150] According to the technical solution in the embodiment of the present application, the ground base station periodically sends the second ground SSB beam based on the ground sub-frequency domain in the first ground carrier, wherein the frequency domain positions of the ground sub-frequency domain and the air sub-frequency domain in the first air-to-ground carrier are different, and the air sub-frequency domain is used for the air-to-ground base station to send the first ground SSB beam and the air SSB beam; the above method can ensure that the frequency domain position of the ground sub-frequency domain where the ground base station sends the second ground SSB beam is different from the frequency domain position of the air-to-ground sub-frequency domain in the first air-to-ground carrier based on the air-to-ground base station, so that The ground base station sends the second ground SSB beam based on the ground sub-frequency domain in the first ground carrier, which is staggered with the frequency domain position of the first ground SSB beam sent by the air-to-ground base station based on the air-to-ground sub-frequency domain in the first air-to-ground carrier. This can reduce the co-channel interference of the air-to-ground SSB beam sent by the air-to-ground base station, thereby improving the signal quality of the ground SSB beam and the air SSB beam sent by the air-to-ground base station and the ground base station, and on this basis, can improve the performance of the air-to-ground network constructed based on the ground SSB beam and the air SSB beam.

[0151] In one embodiment, the embodiment of the present application further provides a beam transmission method, which is applied to a ground base station, and the method includes the following process:

[0152] (1) the ground base station sends a second ground SSB beam based on the first ground carrier, and the ground base station periodically sends a fourth ground SSB beam based on the second ground carrier;

[0153] The air-to-ground base station sends a first ground SSB beam based on the first air-to-ground carrier, and sends an air SSB beam based on the first air-to-ground carrier, wherein the air SSB beam and the target ground SSB beam have different time domain positions and / or different frequency domain positions, and the target ground SSB beam includes the first ground SSB beam and the second ground SSB beam; the second ground carrier and the first ground carrier have different frequency domain positions, and the second ground carrier and the second air-to-ground carrier have the same frequency domain position, and the second air-to-ground carrier is used for the air-to-ground base station to periodically send a third ground SSB beam; the air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell;

[0154] The ground base station in the above step (1) sends the second ground SSB beam based on the first ground carrier, which can be implemented in two ways:

[0155] The first method includes:

[0156] The ground base station sends a second ground SSB beam at a first time domain position based on the first ground carrier; wherein, at the second time domain position, the ground base station does not send the second ground SSB beam or the air SSB beam, and the second time domain position is used for the air-to-ground base station to send the air SSB beam;

[0157] The second method includes:

[0158] The ground base station periodically sends a second ground SSB beam based on the ground sub-frequency domain in the first ground carrier;

[0159] Among them, the frequency domain positions of the ground sub-frequency domain and the air sub-frequency domain in the first air-to-ground carrier are different, and the air sub-frequency domain is used for the air-to-ground base station to send the first ground SSB beam and the air SSB beam.

[0160] The execution process of the above step (1) can be specifically referred to the description of the above embodiment. The implementation principle and technical effect are similar and will not be described in detail here.

[0161] The embodiment of the present application also provides a communication system, which includes at least one air-to-ground base station and at least one ground-to-ground base station;

[0162] The air-to-ground base station is used to send the first ground SSB beam, the third ground SSB beam and the air SSB beam based on the above embodiment to form an air network and a first ground cellular mobile network;

[0163] A ground base station, used for sending a second ground SSB beam and a fourth ground SSB beam based on the above embodiment to form a second ground cellular mobile network;

[0164] The first ground cellular mobile network and the second ground cellular mobile network have different coverage areas, and the air network, the first ground cellular mobile network and the second ground cellular mobile network form an air-ground network.

[0165] It should be noted that the communication system may include at least one air-to-ground base station and at least one ground-to-ground base station. Since there are various buildings and obstacles on the ground, and there are basically no objects blocking the air, the SSB beam ground coverage distance may be smaller than the air coverage distance. Correspondingly, the number of air-to-ground base stations in the communication system may be smaller than the number of ground-to-ground base stations.

[0166] In practical applications, the air-to-ground base station can send an air-to-air SSB beam based on the first air-to-ground carrier to form an air-to-air network. At the same time, the air-to-ground base station can send a first ground-to-ground SSB beam based on the first air-to-ground carrier and send a third ground-to-ground SSB beam based on the second air-to-ground carrier to form a first ground cellular mobile network. In addition, the ground base station can send a second ground-to-ground SSB beam based on the first ground carrier and send a fourth ground-to-ground SSB beam based on the second ground carrier to form a second ground cellular mobile network.

[0167] Among them, the coverage areas of the first ground-to-ground cellular mobile network and the second ground-to-ground cellular mobile network may be adjacent or overlapped, but the sum of the coverage areas of the first ground-to-ground cellular mobile network and the second ground-to-ground cellular mobile network is equal to the coverage area of ​​the ground-to-ground cellular mobile network to be constructed.

[0168] In the embodiment of the present application, the air network, the first ground cellular mobile network and the second ground cellular mobile network are referred to as air-ground networking.

[0169] The communication system provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0170] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0171] Based on the same inventive concept, the embodiment of the present application also provides a beam transmission device for implementing the beam transmission method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the beam transmission device provided below can refer to the limitations on the beam transmission method above, and will not be repeated here.

[0172] In one embodiment, Fig.11 FIG. 1 is a schematic diagram of the structure of a beam transmitting device in an embodiment of the present application. The beam transmitting device provided in the embodiment of the present application can be applied to an air-to-ground base station. Fig.11As shown, the beam sending device of the embodiment of the present application may include: a sending module, wherein:

[0173] A first sending module, configured to send a second ground-to-ground SSB beam based on the first ground-to-ground carrier;

[0174] Among them, the air-to-ground base station sends a first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, wherein the air-to-air SSB beam and the target ground-to-ground SSB beam have different time domain positions and / or frequency domain positions, and the target ground-to-ground SSB beam includes the first ground-to-ground SSB beam and the second ground-to-ground SSB beam.

[0175] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0176] In one embodiment, the beam transmitting device further includes: a third transmitting module, wherein:

[0177] A third sending module, configured to periodically send a third ground-to-ground SSB beam based on a second air-to-ground carrier;

[0178] Among them, the frequency domain position of the second air-to-ground carrier is different from that of the first air-to-ground carrier, and the frequency domain position of the second air-to-ground carrier is the same as that of the second ground carrier. The second ground carrier is used for the ground base station to periodically send a fourth ground SSB beam; the air-to-ground SSB beam sent by the air-to-ground base station and the first ground SSB beam belong to the same cell.

[0179] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0180] In one embodiment, the first sending module includes: a first sending unit, wherein:

[0181] A first sending unit is configured to send a first ground-to-ground SSB beam at a first time domain position based on a first air-to-ground carrier, and send an air-to-air SSB beam at a second time domain position;

[0182] The first time domain position is the same as the time domain position at which the ground base station sends the second ground SSB beam based on the first ground carrier, and the ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position.

[0183] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0184] In one embodiment, the first sending module includes: a second sending unit, wherein:

[0185] A second sending unit is used to send a first ground-to-ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, and send an air-to-air SSB beam based on the air-to-ground sub-frequency domain;

[0186] Among them, the frequency domain position of the air-to-ground sub-frequency domain is different from the frequency domain position of the ground sub-frequency domain in the first ground carrier, and the ground sub-frequency domain is used for the ground base station to periodically send the second ground SSB beam.

[0187] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0188] In one embodiment, the second sending unit is specifically configured to:

[0189] A first ground-to-ground SSB beam is sent at a third time domain position based on the space-to-ground sub-frequency domain, and a ground-to-air SSB beam is sent at a fourth time domain position based on the space-to-ground sub-frequency domain.

[0190] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0191] In one embodiment, Fig.12 FIG. 1 is a schematic diagram of the structure of a beam transmitting device in an embodiment of the present application. The beam transmitting device provided in the embodiment of the present application can be applied to a ground base station. Fig.12 As shown, the beam sending device of the embodiment of the present application may include: a second sending module, wherein:

[0192] A second sending module, configured to send a second ground-to-ground SSB beam based on the first ground-to-ground carrier;

[0193] Among them, the air-to-ground base station sends a first ground-to-ground SSB beam based on the first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, wherein the air-to-air SSB beam and the target ground-to-ground SSB beam have different time domain positions and / or frequency domain positions, and the target ground-to-ground SSB beam includes the first ground-to-ground SSB beam and the second ground-to-ground SSB beam; the air-to-air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell.

[0194] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0195] In one embodiment, the beam transmitting device further includes: a fourth beam module, wherein:

[0196] A fourth beam module, configured to periodically send a fourth ground-to-ground SSB beam based on the second ground-to-ground carrier;

[0197] Among them, the frequency domain position of the second ground carrier is different from that of the first ground carrier, and the frequency domain position of the second ground carrier is the same as that of the second air-to-ground carrier. The second air-to-ground carrier is used for the air-to-ground base station to periodically send a third ground SSB beam.

[0198] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0199] In one embodiment, the second sending module is specifically used for:

[0200] A second ground-to-ground SSB beam is sent at a first time domain position based on a first ground-to-ground carrier; wherein, at the second time domain position, the ground base station does not send a second ground-to-ground SSB beam or an air-to-air SSB beam, and the second time domain position is used for the air-to-ground base station to send an air-to-air SSB beam.

[0201] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0202] In one embodiment, the second sending module is specifically used for:

[0203] Periodically transmitting a second ground-to-ground SSB beam based on a ground-to-ground sub-frequency domain in the first ground-to-ground carrier;

[0204] Among them, the frequency domain positions of the ground sub-frequency domain and the air sub-frequency domain in the first air-to-ground carrier are different, and the air sub-frequency domain is used for the air-to-ground base station to send the first ground SSB beam and the air SSB beam.

[0205] The beam sending device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned beam sending method embodiment of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0206] For the specific definition of the beam sending device, please refer to the definition of the beam sending method above, which will not be repeated here. Each module in the above-mentioned beam sending device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the communication device in the form of hardware, or can be stored in the memory of the communication device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0207] In one embodiment, a communication device is provided. Fig.13 . Fig.13 1 is a schematic diagram of the structure of the communication device provided in the embodiment of the present application. Optionally, the communication device may be a communication module in a base station or a terminal in the service capability calling system. Fig.13 The communication device shown includes: a transceiver, at least one processor, a memory, at least one network interface and a user interface. The various components in the communication device are coupled together through a bus system. It is understood that the bus system is used to achieve connection and communication between these components. In addition to the data bus, the bus system also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the bus system is not shown in FIG. Fig.13 In the specification, various buses are labeled as bus systems. Alternatively, a transceiver may be a plurality of components, that is, a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium.

[0208] The user interface may include a display, a keyboard, or a pointing device (eg, a mouse, a trackball, a touch pad, or a touch screen, etc.).

[0209] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct RAM bus random access memory (DRRAM). The memory of the system and method described in the embodiments of the present application is intended to include but is not limited to these and any other suitable types of memory.

[0210] In some embodiments, the memory stores the following elements, executable modules or data structures, or other subsets, or other extended sets: operating system and application programs.

[0211] The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application includes various application programs, such as a media player, a browser, etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present application can be included in the application.

[0212] In the embodiment of the present application, the program or instruction stored in the memory is called, specifically, the program or instruction stored in the application program.

[0213] Part or all of the methods disclosed in the above embodiments of the present application can be applied to a processor, or implemented by a processor, or implemented by a processor in cooperation with other components (such as a transceiver). The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0214] It is to be understood that the embodiments described in the embodiments of the present application can be implemented by hardware, software, firmware, middleware, microcode or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPDevice, DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present application or a combination thereof.

[0215] For software implementation, the technology in the embodiments of the present application can be implemented by a module (such as a process, function, etc.) that performs the functions described in the embodiments of the present application. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0216] Those skilled in the art will understand that Fig.13 The structure shown in the figure is only a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the communication device to which the scheme of the present application is applied. The specific communication device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0217] In one embodiment, a communication device is further provided, including a transceiver, a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of the method in any of the above embodiments are implemented.

[0218] In one embodiment, a computer-readable storage medium is further provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method in any of the above embodiments are implemented.

[0219] In one embodiment, a computer program product is also provided, including a computer program, which implements the steps of the method in any of the above embodiments when executed by a processor.

[0220] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, information library or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0221] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0222] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A beam transmission method, characterized in that: Applied to any air-to-ground base station in a communication system, the method comprises: Sending a first ground-to-ground SSB beam based on a first air-to-ground carrier, and sending an air-to-air SSB beam based on the first air-to-ground carrier; Among them, the time domain position and / or frequency domain position of the air-to-ground SSB beam and the target ground-to-ground SSB beam are different, the target ground-to-ground SSB beam includes the first ground-to-ground SSB beam and the second ground-to-ground SSB beam sent by the ground base station based on the first ground carrier, the first ground carrier and the first air-to-ground carrier are located in the same frequency domain position, and the different frequency domain positions indicate that the frequency domain position of the ground sub-frequency domain in the first ground carrier is different from the frequency domain position of the air-to-ground subcarrier in the first air-to-ground carrier; the air-to-ground SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell; the communication system includes multiple cellular base stations, at least one cellular base station among the multiple cellular base stations is configured as an air-to-ground base station, and the other cellular base stations among the multiple cellular base stations are configured as the ground base stations.

2. The method according to claim 1, characterized in that The method further comprises: The air-to-ground base station periodically sends a third ground-to-ground SSB beam based on the second air-to-ground carrier; The frequency domain position of the second air-to-ground carrier is different from that of the first air-to-ground carrier, and the frequency domain position of the second air-to-ground carrier is the same as that of the second ground carrier. The second ground carrier is used for the ground base station to periodically send a fourth ground SSB beam.

3. The method according to claim 1, characterized in that The air-to-ground base station sends a first ground-to-ground SSB beam based on a first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, including: The air-to-ground base station sends the first ground-to-ground SSB beam at a first time domain position based on the first air-to-ground carrier, and sends the air-to-air SSB beam at a second time domain position; The first time domain position is the same as the time domain position at which the ground base station sends the second ground SSB beam based on the first ground carrier, and the ground base station does not send the second ground SSB beam or the air SSB beam at the second time domain position.

4. The method according to claim 1, characterized in that: The air-to-ground base station sends a first ground-to-ground SSB beam based on a first air-to-ground carrier, and sends an air-to-air SSB beam based on the first air-to-ground carrier, including: The air-to-ground base station sends the first ground-to-ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, and sends the air-to-air SSB beam based on the air-to-ground sub-frequency domain; Among them, the frequency domain position of the air-to-ground sub-frequency domain is different from the frequency domain position of the ground sub-frequency domain in the first ground carrier, and the ground sub-frequency domain is used for the ground base station to periodically send the second ground SSB beam.

5. The method according to claim 4, characterized in that The air-to-ground base station sends the first ground-to-ground SSB beam based on the air-to-ground sub-frequency domain in the first air-to-ground carrier, and sends the air-to-air SSB beam based on the air-to-ground sub-frequency domain, including: The air-to-ground base station sends the first ground-to-ground SSB beam at a third time domain position based on the air-to-ground sub-frequency domain, and sends the air-to-air SSB beam at a fourth time domain position based on the air-to-ground sub-frequency domain.

6. A beam transmission method, characterized in that: Applied to any ground-to-ground base station in a communication system, the method comprises: transmitting a second ground-to-ground SSB beam based on the first ground-to-ground carrier; Among them, the air-to-ground base station sends a first ground SSB beam based on a first air-to-ground carrier, and sends an air SSB beam based on the first air-to-ground carrier, wherein the air SSB beam is different from the target ground SSB beam in time domain position and / or frequency domain position, and the target ground SSB beam includes the first ground SSB beam and the second ground SSB beam; the air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell; the first ground carrier and the first air-to-ground carrier are located in the same frequency domain position, and the different frequency domain positions indicate that the frequency domain position of the ground sub-frequency domain in the first ground carrier is different from the frequency domain position of the air-to-ground subcarrier in the first air-to-ground carrier; the communication system includes multiple cellular base stations, at least one of the multiple cellular base stations is configured as the air-to-ground base station, and the other cellular base stations in the multiple cellular base stations are configured as ground base stations.

7. The method according to claim 6, characterized in that The method further comprises: The ground base station periodically sends a fourth ground SSB beam based on the second ground carrier; The second ground-to-ground carrier and the first ground-to-ground carrier are located in different frequency domain positions, and the second ground-to-ground carrier and the second air-to-ground carrier are located in the same frequency domain position, and the second air-to-ground carrier is used for the air-to-ground base station to periodically send a third ground-to-ground SSB beam.

8. The method according to claim 6, characterized in that The ground base station sends a second ground SSB beam based on the first ground carrier, including: The ground-to-ground base station sends the second ground-to-ground SSB beam at a first time domain position based on the first ground-to-ground carrier; wherein, at a second time domain position, the ground-to-ground base station does not send the second ground-to-ground SSB beam or the air-to-air SSB beam, and the second time domain position is used for the air-to-ground base station to send the air-to-air SSB beam.

9. The method according to claim 6, characterized in that The ground base station sends a second ground SSB beam based on the first ground carrier, including: The ground-to-ground base station periodically sends the second ground-to-ground SSB beam based on the ground sub-frequency domain in the first ground-to-ground carrier; Among them, the frequency domain positions of the ground sub-frequency domain and the air sub-frequency domain in the first air-to-ground carrier are different, and the air sub-frequency domain is used for the air-to-ground base station to send the first ground SSB beam and the air SSB beam.

10. A communication system, characterized in that: The communication system includes at least one air-to-ground base station and at least one ground-to-ground base station; Wherein, the air-to-ground base station is used to implement the steps of the method as described in any one of claims 1 to 5 above, forming an air-to-ground network and a ground-to-ground cellular mobile network; The ground base station is used to implement the steps of the method as described in any one of claims 6 to 9 above to form the ground cellular mobile network; The air-to-ground network and the ground-to-ground cellular mobile network form an air-to-ground network.

11. A beam transmitting device, characterized in that: The device comprises: A first sending module, configured to send a first ground-to-ground SSB beam based on a first air-to-ground carrier, and send an air-to-air SSB beam based on the first air-to-ground carrier; Among them, the time domain position and / or frequency domain position of the air-to-ground SSB beam and the target ground-to-ground SSB beam are different, the target ground-to-ground SSB beam includes the first ground-to-ground SSB beam and the second ground-to-ground SSB beam sent by the ground base station based on the first ground carrier, the first ground carrier and the first air-to-ground carrier are located in the same frequency domain position, and the different frequency domain positions indicate that the frequency domain position of the ground sub-frequency domain in the first ground carrier is different from the frequency domain position of the air-to-ground subcarrier in the first air-to-ground carrier; the air-to-ground SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell; the air-to-ground base station is any air-to-ground base station in the communication system; the communication system includes multiple cellular base stations, at least one of the multiple cellular base stations is configured as an air-to-ground base station, and the other cellular base stations among the multiple cellular base stations are configured as the ground base stations.

12. A beam transmitting device, characterized in that: The device comprises: A second sending module, configured to send a second ground-to-ground SSB beam based on the first ground-to-ground carrier; Among them, the air-to-ground base station sends a first ground SSB beam based on a first air-to-ground carrier, and sends an air SSB beam based on the first air-to-ground carrier, wherein the air SSB beam is different from the target ground SSB beam in time domain position and / or frequency domain position, and the target ground SSB beam includes the first ground SSB beam and the second ground SSB beam; the air SSB beam and the first ground SSB beam sent by the air-to-ground base station belong to the same cell; the first ground carrier and the first air-to-ground carrier are located in the same frequency domain position, and the different frequency domain positions indicate that the frequency domain position of the ground sub-frequency domain in the first ground carrier is different from the frequency domain position of the air-to-ground subcarrier in the first air-to-ground carrier; the communication system includes multiple cellular base stations, at least one of the multiple cellular base stations is configured as the air-to-ground base station, and the other cellular base stations in the multiple cellular base stations are configured as ground base stations.

13. A communication device, comprising a transceiver, a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 9 are implemented.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

15. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

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