Beam control method and device, terminal and network equipment

Abstract

The invention provides a beam control method and device, a terminal and network equipment, and relates to the technical field of communication. The beam control method is executed by a target network device, and comprises: for a transparent forwarding mode, adjusting a timing relationship of a transmission time pattern based on a time delay of a feed link, the transmission time pattern comprising: a sending time pattern and / or a receiving time pattern; wherein the target network device is a satellite-borne controller or a ground network device. According to the scheme, the timing relation of the transmission time pattern is adjusted based on the time delay of the feed link, so that beam transmission control in the transparent forwarding mode can be realized, and the satellite system capability of the transparent forwarding mode can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a beam control method, device, terminal and network equipment. Background Art

[0002] Low-orbit satellite systems are currently a technological hotspot in the industry. The global coverage capabilities provided by low-orbit satellites can achieve seamless coverage of the sky and the earth, making it possible for users to access the communication network at any time and any location.

[0003] Traditional satellite communications have two types of beams, namely fixed beams and controllable beams. Fixed beams, i.e. satellite beams, cannot be adjusted in direction relative to the satellite during use, and are relatively simple to implement. For controllable beams, the use method is more flexible, and two modes are usually used: one is the staring mode, that is, no matter how the satellite moves, the beam always points to a fixed area, and the center of the beam projection remains unchanged; the other is the beam hopping mode, that is, the beam serves different locations at different times, and the center of the beam projection keeps jumping. Since beam hopping is sensitive to time synchronization, it is mainly used in the on-board processing mode, and it is more difficult to use in the transparent mode (bent pipe mode). Summary of the invention

[0004] The embodiments of the present application provide a beam control method, apparatus, terminal and network equipment to provide a dynamic beam hopping technical solution in a transparent forwarding mode.

[0005] In order to solve the above technical problems, an embodiment of the present application provides a beam control method, which is performed by a target network device, including:

[0006] For the transparent forwarding mode, adjusting the timing relationship of the transmission time pattern based on the delay of the feeder link, the transmission time pattern includes: a sending time pattern and / or a receiving time pattern;

[0007] The target network device is a satellite-borne controller or a ground-based network device.

[0008] Optionally, when the target network device is a satellite-borne controller, the method further includes:

[0009] Acquire control information, the control information being used to indicate a transmission time pattern of a beam of a ground network device;

[0010] The transmission time pattern includes: a sending time pattern and / or a receiving time pattern.

[0011] Optionally, the delay adjustment of the feeder link-based transmission time pattern timing relationship includes:

[0012] Adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite according to the transmission time pattern and the time delay of the feeder link;

[0013] The uplink beam corresponds to the uplink service link from the terminal to the satellite and the uplink feeder link from the satellite to the ground network equipment, and the downlink beam corresponds to the downlink service link from the satellite to the terminal and the downlink feeder link from the ground network equipment to the satellite.

[0014] Optionally, the transmission time pattern of the uplink beam and / or the downlink beam satisfies at least one of the following:

[0015] Different subframes serve different beam areas;

[0016] Different time slots serve different beam areas;

[0017] Different symbols serve different beam areas.

[0018] Optionally, the control information is further used to indicate at least one of the following:

[0019] The starting point of the initial timing;

[0020] An adjustment interval value of a timing start point of a transmission time pattern;

[0021] The adjustment interval value of the timing start point of the transmission time pattern includes at least one of the following:

[0022] An adjustment interval value of a timing start point of a transmission time pattern of a downlink beam;

[0023] An adjustment interval value of a timing start point of a reception time pattern of an uplink beam;

[0024] The adjustment interval value of the timing starting point shared by the uplink beam and the downlink beam.

[0025] Optionally, the adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite includes:

[0026] The time starting point of the transmission time pattern of the uplink beam or the downlink beam of the satellite is adjusted according to the adjustment interval value of the timing starting point of the transmission time pattern.

[0027] Optionally, a time starting point of a transmission time pattern of a downlink beam of the satellite is at least one feeder link delay longer than a time starting point of a transmission time pattern of a downlink beam of the ground network device.

[0028] Optionally, adjusting the time starting point of the transmission time pattern of the uplink beam of the satellite according to the transmission time pattern and the time delay of the feeder link includes:

[0029] In the case where the uplink timing reference point is a satellite, the time starting point of the reception time pattern of the satellite's uplink beam is determined based on the time starting point of the transmission time pattern of the satellite's downlink beam;

[0030] Among them, the sending time pattern of the downlink beam and the receiving time pattern of the uplink beam correspond to the service link, and the time starting point of the sending time pattern of the downlink beam of the satellite is one feeder link delay longer than the time starting point of the beam sending time pattern of the ground network device.

[0031] Optionally, the determining the time starting point of the receiving time pattern of the uplink beam of the satellite based on the time starting point of the sending time pattern of the downlink beam of the satellite includes:

[0032] Determine the time starting point of the receiving time pattern of the satellite's uplink beam according to the time starting point of the sending time pattern of the satellite's downlink beam and the uplink and downlink delay deviation;

[0033] The uplink and downlink delay deviation is a value greater than or equal to 0.

[0034] Optionally, adjusting the time starting point of the transmission time pattern of the uplink beam of the satellite according to the transmission time pattern and the time delay of the feeder link includes:

[0035] When the uplink timing reference point is the ground network equipment, the time starting point of the reception time pattern of the satellite's uplink beam is periodically adjusted according to the delay of the feeder link and the reception time pattern of the uplink beam of the ground network equipment.

[0036] Optionally, the time starting point of the reception time pattern of the uplink beam is the time starting point of the reception time pattern of the uplink beam of the ground network device minus the delay of the feeder link.

[0037] Optionally, when the target network device is a ground network device, the timing relationship of the delay adjustment transmission time pattern based on the feeder link includes at least one of the following:

[0038] Subtracting the delay of the feeder link from the time starting point of the transmission time pattern of the downlink beam of the satellite, the time starting point of the transmission time pattern of the downlink beam of the ground network device is determined as the time starting point of the transmission time pattern of the downlink beam, and the time starting point of the transmission time pattern of the downlink beam is dynamically adjusted based on the change of the delay of the feeder link;

[0039] The time starting point of the reception time pattern of the satellite's uplink beam is added to the delay of the feeder link to determine the time starting point of the reception time pattern of the uplink beam of the ground network device. The time starting point of the reception time pattern of the uplink beam is dynamically adjusted based on the change of the delay of the feeder link.

[0040] Optionally, the method further includes:

[0041] In case that the timing starting point of the satellite's transmission time pattern is adjusted, sending the satellite beam receiving and transmitting timing adjustment time information and / or the target signal to the terminal;

[0042] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0043] The embodiment of the present application further provides a beam control method, which is performed by a terminal and includes:

[0044] Acquire time information and / or target signal for satellite beam transmit / receive timing adjustment;

[0045] Transmitting communication signals according to the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment;

[0046] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0047] Optionally, the acquiring time information and / or target signal for adjusting the satellite beam receiving and transmitting timing includes:

[0048] The satellite beam receiving and transmitting timing adjustment time information and / or target signal sent by the ground network equipment is received through the satellite.

[0049] The embodiment of the present application further provides a network device, which is a target network device, including a memory, a transceiver, and a processor:

[0050] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0051] For the transparent forwarding mode, adjusting the timing relationship of the transmission time pattern based on the delay of the feeder link, the transmission time pattern includes: a sending time pattern and / or a receiving time pattern;

[0052] The target network device is a satellite-borne controller or a ground-based network device.

[0053] Optionally, when the target network device is a satellite-borne controller, the processor, for reading the computer program in the memory, further performs the following operations:

[0054] Acquire control information, the control information being used to indicate a transmission time pattern of a beam of a ground network device;

[0055] The transmission time pattern includes: a sending time pattern and / or a receiving time pattern.

[0056] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0057] Adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite according to the transmission time pattern and the time delay of the feeder link;

[0058] The uplink beam corresponds to the uplink service link from the terminal to the satellite and the uplink feeder link from the satellite to the ground network equipment, and the downlink beam corresponds to the downlink service link from the satellite to the terminal and the downlink feeder link from the ground network equipment to the satellite.

[0059] Optionally, the transmission time pattern of the uplink beam and / or the downlink beam satisfies at least one of the following:

[0060] Different subframes serve different beam areas;

[0061] Different time slots serve different beam areas;

[0062] Different symbols serve different beam areas.

[0063] Optionally, the control information is further used to indicate at least one of the following:

[0064] The starting point of the initial timing;

[0065] An adjustment interval value of a timing start point of a transmission time pattern;

[0066] The adjustment interval value of the timing start point of the transmission time pattern includes at least one of the following:

[0067] An adjustment interval value of a timing start point of a transmission time pattern of a downlink beam;

[0068] An adjustment interval value of a timing start point of a reception time pattern of an uplink beam;

[0069] The adjustment interval value of the timing starting point shared by the uplink beam and the downlink beam.

[0070] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0071] The time starting point of the transmission time pattern of the uplink beam or the downlink beam of the satellite is adjusted according to the adjustment interval value of the timing starting point of the transmission time pattern.

[0072] Optionally, a time starting point of a transmission time pattern of a downlink beam of the satellite is at least one feeder link delay longer than a time starting point of a transmission time pattern of a downlink beam of the ground network device.

[0073] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0074] In the case where the uplink timing reference point is a satellite, the time starting point of the reception time pattern of the satellite's uplink beam is determined based on the time starting point of the transmission time pattern of the satellite's downlink beam;

[0075] Among them, the sending time pattern of the downlink beam and the receiving time pattern of the uplink beam correspond to the service link, and the time starting point of the sending time pattern of the downlink beam of the satellite is one feeder link delay longer than the time starting point of the beam sending time pattern of the ground network device.

[0076] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0077] Determine the time starting point of the receiving time pattern of the satellite's uplink beam according to the time starting point of the sending time pattern of the satellite's downlink beam and the uplink and downlink delay deviation;

[0078] The uplink and downlink delay deviation is a value greater than or equal to 0.

[0079] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0080] When the uplink timing reference point is the ground network equipment, the time starting point of the reception time pattern of the satellite's uplink beam is periodically adjusted according to the delay of the feeder link and the reception time pattern of the uplink beam of the ground network equipment.

[0081] Optionally, the time starting point of the reception time pattern of the uplink beam is the time starting point of the reception time pattern of the uplink beam of the ground network device minus the delay of the feeder link.

[0082] Optionally, when the target network device is a ground network device, the processor is configured to read the computer program in the memory and perform at least one of the following operations:

[0083] Subtracting the delay of the feeder link from the time starting point of the transmission time pattern of the downlink beam of the satellite, the time starting point of the transmission time pattern of the downlink beam of the ground network device is determined as the time starting point of the transmission time pattern of the downlink beam, and the time starting point of the transmission time pattern of the downlink beam is dynamically adjusted based on the change of the delay of the feeder link;

[0084] The time starting point of the reception time pattern of the satellite's uplink beam is added to the delay of the feeder link to determine the time starting point of the reception time pattern of the uplink beam of the ground network device. The time starting point of the reception time pattern of the uplink beam is dynamically adjusted based on the change of the delay of the feeder link.

[0085] Optionally, the processor, for reading the computer program in the memory, further performs the following operations:

[0086] In case that the timing starting point of the satellite's transmission time pattern is adjusted, sending the satellite beam receiving and transmitting timing adjustment time information and / or the target signal to the terminal;

[0087] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0088] The embodiment of the present application also provides a terminal, including a memory, a transceiver, and a processor:

[0089] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0090] Acquire time information and / or target signal for satellite beam transmit / receive timing adjustment;

[0091] Transmitting communication signals according to the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment;

[0092] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0093] Optionally, the processor, for reading the computer program in the memory, further performs the following operations:

[0094] The satellite beam receiving and transmitting timing adjustment time information and / or target signal sent by the ground network equipment is received through the satellite.

[0095] The embodiment of the present application further provides a beam control device, which is applied to a target network device, including:

[0096] An adjustment unit, configured to adjust the timing relationship of a transmission time pattern based on a delay of a feeder link for a transparent forwarding mode, wherein the transmission time pattern includes: a transmission time pattern and / or a reception time pattern;

[0097] The target network device is a satellite-borne controller or a ground-based network device.

[0098] The embodiment of the present application further provides a beam control device, applied to a terminal, including:

[0099] A first acquisition unit is used to acquire time information and / or a target signal for adjusting the timing of satellite beam reception and transmission;

[0100] A transmission unit, configured to transmit a communication signal according to the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment;

[0101] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0102] An embodiment of the present application also provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the above method.

[0103] The beneficial effects of this application are:

[0104] The above scheme can realize beam transmission control in transparent forwarding mode by adjusting the timing relationship of the transmission time pattern based on the delay of the feeder link, thereby improving the satellite system capability of the transparent forwarding mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0105] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0106] Figure 1 A schematic diagram showing the transparent forwarding mode network architecture of 5G NTN;

[0107] Figure 2 A structural diagram showing a network system applicable to an embodiment of the present application;

[0108] Figure 3 A schematic diagram showing a flow chart of a beam control method according to an embodiment of the present application;

[0109] Figure 4 A schematic diagram showing the use of time division multiplexing of satellite beams;

[0110] Figure 5 A schematic diagram showing the delay in transparent forwarding mode;

[0111] Figure 6 Intent to express the timing difference between ground base station beam and satellite beam;

[0112] Figure 7 A schematic diagram showing the downlink timing and uplink timing of a satellite beam;

[0113] Figure 8 A schematic diagram showing the downlink timing and uplink timing deviation of a ground base station;

[0114] Fig. 9 Indicates the difference between the downlink timing and uplink timing of the satellite beam;

[0115] Fig.10 A schematic diagram showing a timing sequence with a satellite as a timing reference point;

[0116] Fig.11 A second flowchart of the beam control method according to an embodiment of the present application is shown;

[0117] Fig.12 One of the schematic unit diagrams of the beam control device according to an embodiment of the present application;

[0118] Fig.13 A structural diagram showing a network device according to an embodiment of the present application;

[0119] Fig.14 A second schematic diagram showing a unit of a beam control device according to an embodiment of the present application;

[0120] Fig.15 A structural diagram of a terminal according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0121] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0122] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, are implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0123] In the embodiments of the present application, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0124] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0125] The combination of low-orbit satellites and 5G systems forms the 5G non-terrestrial network (NTN) technology. Currently, two NTN technology versions, Rel-17 and Rel-18, have been formed, both of which support transparent forwarding network architectures, such as Figure 1 As shown, however, the application of beam hopping has not been effectively enhanced, resulting in the inability of the actual system to adopt the 5G NTN standard to implement the beam hopping technology solution.

[0126] The following is an introduction to the embodiments of the present application in conjunction with the accompanying drawings. The beam control method, device, terminal and network device provided in the embodiments of the present application can be applied to a wireless communication system. The wireless communication system can be a system using the fifth generation (5th Generation, 5G) mobile communication technology (hereinafter referred to as a 5G system). Those skilled in the art can understand that the 5G NR system is only an example and is not a limitation.

[0127] See also Figure 2 , Figure 2 is a structural diagram of a network system to which the embodiments of the present application can be applied, such as Figure 2 As shown, it includes a user terminal 11 and a base station 12, wherein the user terminal 11 may be a user equipment (UE), for example, it may be a terminal side device such as a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (PDA for short), a mobile Internet device (Mobile Internet Device, MID) or a wearable device (Wearable Device). It should be noted that the specific type of the user terminal 11 is not limited in the embodiment of the present application. The above-mentioned base station 12 may be a base station of 5G and later versions (for example: gNB, 5G NR NB), or a base station in other communication systems or a gateway station supporting satellite communication, or referred to as a node B. It should be noted that in the embodiment of the present application, only a 5G base station is taken as an example, but the specific type of the base station 12 is not limited.

[0128] Based on the analysis, an embodiment of the present application provides a beam control method, apparatus, terminal and network equipment to provide a dynamic beam hopping technical solution in a transparent forwarding mode.

[0129] Among them, the method and the device are based on the same application concept. Since the method and the device solve the problem in a similar principle, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0130] like Figure 3 As shown, an embodiment of the present application provides a beam control method, which is performed by a target network device, including:

[0131] Step S301, for a transparent forwarding mode, adjusting the timing relationship of a transmission time pattern based on a delay of a feeder link, wherein the transmission time pattern includes: a sending time pattern and / or a receiving time pattern;

[0132] The target network device is a satellite-borne controller or a ground-based network device.

[0133] It should be noted that the embodiment of the present application can adjust the timing relationship of the transmission time pattern based on the delay of the feeder link in the transparent forwarding mode, so as to improve the satellite system capability of the transparent forwarding mode. The specific method of adjustment is to advance or lag the execution start point of the transmission time pattern based on the change of the feeder delay.

[0134] It should be noted that the transmission time pattern mentioned in the embodiment of the present application can be understood as a beam scanning timing, that is, scanning (or serving) different areas at different time intervals, and the granularity of the time interval can be a frame, a subframe, a time slot, a symbol, etc. The transmission time pattern can be understood as a scanning timing of beam transmission, and can also be called a beam transmission timing, and the reception time pattern can be understood as a scanning timing of beam reception, and can also be called a beam reception timing.

[0135] Optionally, in one implementation, the device that adjusts the transmission time pattern is a satellite controller, and the ground network equipment (for example, a ground base station) determines the timing of the time pattern according to the ground network equipment's own timing reference to send and receive signals, which requires the satellite controller to have the ability to adjust the timing of beam transmission; optionally, in another implementation, the device that adjusts the transmission time pattern is a ground network equipment, and the satellite controller controls the satellite beam to send and receive signals according to the specified time pattern and the satellite controller's own timing relationship, without making adjustments for delay changes in the satellite-to-ground feeder link.

[0136] It should be further explained that the difference between the above two implementations is that the network side behavior is different, which is mainly reflected in whether the ground network equipment or the satellite controller adjusts the signal time pattern; for the terminal behavior, there are two implementations:

[0137] Method 1: The beam transmission and reception time pattern on the network side is accurately adjusted. The terminal transmits and receives signals according to the beam scheduling time pattern and beam service time pattern on the network side. The terminal is transparent to the beam signal adjustment based on the delay of the feeder link on the network side.

[0138] Method 2: There is a certain error in the adjustment of the beam receiving and transmitting time pattern on the network side. There is a deviation in time synchronization when the terminal receives and transmits signals according to the beam scheduling time pattern and the beam service time pattern on the network side. The network notifies the terminal of the time of satellite beam receiving and transmitting timing adjustment each time the satellite beam is adjusted, or sends a synchronization signal or a reference signal to help the terminal perform synchronization correction.

[0139] For the transparent forwarding scenario, the ground network equipment in the embodiment of the present application is responsible for sending and receiving wireless communication signals with the terminal; the satellite in the embodiment of the present application includes a satellite controller and a satellite antenna array, the satellite controller controls the transmission time pattern of the satellite beam, and the satellite antenna array is responsible for sending and receiving wireless signals.

[0140] First of all, it should be noted that in transparent forwarding mode, if beam hopping is used, the same satellite beam covers different areas at different time points, usually using time division multiplexing beam service mode. For details, see Figure 4 shown.

[0141] It should be noted that the scanning pattern of the beam hopping is for the service link of the terminal, so the signal on the service link will hop in different beam areas according to the time plan, but for the feeder link, a transparent forwarding method is adopted. The feeder link is responsible for relaying the communication signals between the satellite and the ground network equipment. Therefore, it will carry the signals of different beam areas corresponding to the service link at different times. The beam direction corresponds to the connection direction of the satellite and the ground network, and there is no hopping.

[0142] In the transparent forwarding mode, there are two delays. The first is the delay Ts of the user service link, and the second is the delay Tf of the feeder link. Figure 5 As shown in the figure, due to the movement of low-orbit satellites, Ts and Tf will change continuously over time, with a typical change rate of 20us / s. The different elevation angles of the terminal and the satellite will also cause the time change rate to change accordingly.

[0143] The specific implementation of this application is illustrated below with examples in different adjustment subjects.

[0144] 1. The target network device is a satellite-borne controller

[0145] Optionally, in one implementation, before the delay adjustment transmission time pattern based on the feeder link, the method further includes:

[0146] Acquire control information, the control information being used to indicate a transmission time pattern of a beam of a ground network device;

[0147] The transmission time pattern includes: a sending time pattern and / or a receiving time pattern.

[0148] It should be noted that the control information is usually sent by ground network equipment or ground control equipment to the onboard controller.

[0149] That is, the ground network equipment needs to inform the satellite controller of the transmission time pattern and / or reception time pattern of its beam to ensure that the satellite controller can know the transmission status of the ground network equipment and ensure the accuracy of the time pattern adjustment.

[0150] Typically, the control information refers to a reception time pattern of an uplink beam and / or a transmission time pattern of a downlink beam of a ground network device.

[0151] Further optionally, in one implementation, the delay adjustment of the feeder link-based transmission time pattern timing relationship includes:

[0152] Adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite according to the transmission time pattern and the time delay of the feeder link;

[0153] The uplink beam corresponds to the uplink service link from the terminal to the satellite and the uplink feeder link from the satellite to the ground network equipment, and the downlink beam corresponds to the downlink service link from the satellite to the terminal and the downlink feeder link from the ground network equipment to the satellite.

[0154] It should be noted here that, because the ground network equipment transmits and receives signals according to the configured time pattern in accordance with the local timing, the satellite controller only needs to adjust the time starting point of the transmission time pattern of its uplink beam and / or downlink beam according to the transmission time pattern of the ground network equipment and the delay of the feed link. The specific adjustment method is that the satellite controller and the local ground network equipment first establish time synchronization, and then establish the time starting point of the transmission time pattern of the satellite beam based on the determined time difference. Further, the satellite controller and the ground network equipment can establish a common time baseline based on the Global Navigation Satellite System (GNSS) system clock, and then the satellite controller calculates the transmission delay between them based on the satellite ephemeris and the geographical location of the ground network, thereby calculating the time difference. Based on the time difference, the satellite controller controls the receiving and sending time point of the satellite beam, determines the timing relationship between the receiving and sending time point of the satellite beam and the receiving and sending time point of the ground network equipment, thereby ensuring the effective transmission of the feed communication signal.

[0155] Normally, for downlink, the starting point of the transmission time pattern of the satellite's downlink beam is the starting point of the transmission time pattern of the downlink beam of the ground network equipment plus the delay of the feeder link, which may also include the forwarding delay of the satellite beam, which is generally very small, within 1us.

[0156] Optionally, in one implementation, the transmission time pattern of the uplink beam and / or the downlink beam satisfies at least one of the following:

[0157] A11. Different subframes serve different beam areas;

[0158] A12. Different time slots serve different beam areas;

[0159] A13. Different symbols serve different beam areas.

[0160] That is to say, for the time pattern, there can be different time granularities, such as different subframes, service links of satellite beams of time slots serving different beam areas, or service links of satellite beams of different symbols serving different beam areas; further, different symbols in a time slot can carry different physical channel types, or different symbols transmit data information of different beam areas. For example, the corresponding relationship between the transmission time pattern and the granularity is shown in Table 1.

[0161] Table 1 Transmission time pattern of beam and subframe comparison table

[0162]

[0163] Optionally, in one implementation, the control information is further used to indicate at least one of the following:

[0164] A21, the starting point of the initial timing;

[0165] Optionally, the time starting point includes at least one of the following: a frame, a subframe, a time slot, a symbol;

[0166] The so-called initial timing starting point refers to the time when the satellite and ground network equipment need to start periodically executing the transmission time pattern based on a common time reference point. The satellite beam serves different beam areas according to the transmission time pattern. Due to the transmission delay between the satellite and the ground network equipment, the time starting point of the transmission time pattern actually executed by the satellite differs from that of the ground network equipment by at least one feeder link delay.

[0167] A22, the adjustment interval value of the timing starting point of the transmission time pattern;

[0168] Optionally, the adjustment interval value of the timing start point of the transmission time pattern includes at least one of the following:

[0169] A221, adjustment interval value of the timing start point of the transmission time pattern of the downlink beam;

[0170] A222, adjustment interval value of the timing start point of the reception time pattern of the uplink beam;

[0171] A223, adjustment interval value of the timing starting point shared by the uplink beam and the downlink beam.

[0172] The above adjustment interval value refers to the periodic adjustment of the corresponding transmission time pattern, mainly based on the change of the feed delay, to advance or lag the signal reception and transmission timing. Due to the continuous change of the feed delay, when a certain time interval is exceeded, the satellite timing point and the ground network timing point will no longer maintain a fixed feed link delay difference, so periodic adjustment is required.

[0173] It should be pointed out that the adjustment of the timing starting point of the transmission time pattern is usually periodic or non-periodic. For continuous data services, a periodic adjustment method is required. For a few special scenarios, such as burst services or connections, non-periodic adjustment can be used. Moreover, the adjustment time interval can be technically reflected as a time segment adjustment, such as adjustment every 10ms, 100ms, or 1s. This is equivalent to no longer adjusting the time starting point during this time period, and the effective maintenance time of the timing is equal to the adjusted interval value. The time length of this segmented adjustment or adjustment interval value can be equal to an integer multiple of a complete time pattern to ensure that the timing of each time pattern period is not affected.

[0174] It should be noted that this method of adjusting the timing starting point is not only applicable to the case where the target network device is a satellite-borne controller, but also applicable to the case where the target network device is a ground network device (for example, a ground base station).

[0175] Optionally, in one implementation, the implementation of adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite includes:

[0176] The time starting point of the transmission time pattern of the uplink beam or the downlink beam of the satellite is adjusted according to the adjustment interval value of the timing starting point of the transmission time pattern.

[0177] It should be noted here that due to the change in the timing starting point of the transmission time pattern, the timing starting point of the satellite's transmission time pattern will also change. Therefore, in this case, the timing starting point of the satellite's uplink beam or downlink beam transmission time pattern will be adjusted in real time based on the adjustment interval value of the timing starting point of the transmission time pattern and the delay of the feed link.

[0178] Optionally, the time starting point of the transmission time pattern of the downlink beam of the satellite is at least one feeder link delay longer than the time starting point of the transmission time pattern of the downlink beam of the ground network device. When the forwarding delay of the satellite beam is negligible, the time starting points of the two differ by one feeder link delay.

[0179] It should also be noted that, for the uplink, since the uplink timing reference point can be a satellite or a ground network device, different uplink timing reference points correspond to different specific processing methods, which are explained below.

[0180] 1. The uplink timing reference point is the satellite

[0181] Since the timing reference point is on the satellite, for the terminal, the compensation value of its uplink timing is only twice the delay of the service link, so at the satellite reference point, the transmission and reception timing of the downlink signal and the uplink signal are aligned. If beam hopping is used, when the transmission time pattern of the downlink beam is the same as the transmission time pattern of the uplink beam, the timing starting point of the transmission time pattern of the downlink beam is aligned with the timing starting point of the transmission time pattern of the uplink beam.

[0182] Optionally, in this case, the specific implementation of adjusting the time starting point of the transmission time pattern of the uplink beam of the satellite according to the transmission time pattern and the delay of the feeder link includes:

[0183] Determine the time starting point of the reception time pattern of the uplink beam of the satellite based on the time starting point of the transmission time pattern of the downlink beam of the satellite;

[0184] Among them, the sending time pattern of the downlink beam and the receiving time pattern of the uplink beam correspond to the service link, and the time starting point of the sending time pattern of the downlink beam of the satellite is one feeder link delay longer than the time starting point of the beam sending time pattern of the ground network device.

[0185] Optionally, in one implementation, the specific implementation of determining the time starting point of the receiving time pattern of the uplink beam of the satellite based on the time starting point of the sending time pattern of the downlink beam of the satellite includes:

[0186] Determine the time starting point of the receiving time pattern of the satellite's uplink beam according to the time starting point of the sending time pattern of the satellite's downlink beam and the uplink and downlink delay deviation;

[0187] The uplink and downlink delay deviation is a value greater than or equal to 0.

[0188] It should be noted that in this case, the transmission time pattern of the satellite's downlink beam and the reception time pattern of the satellite's uplink beam can be synchronized or there can be a time delay deviation. The main purpose of this time delay deviation design is to facilitate the transceiver conversion of terminal signals. For example, the terminal can receive the signal of the satellite's downlink beam at time T and send the signal of the uplink beam in T+K time slots. Therefore, the time pattern of the satellite's uplink receiving beam must match the terminal uplink timing so that the satellite can receive the terminal's signal. The main technical means is to delay the reception of the satellite's uplink beam by a time interval, that is, there is a time delay deviation between the satellite's uplink beam and the downlink beam.

[0189] Optionally, when the transmission time pattern of the satellite's downlink beam and the reception time pattern of the satellite's uplink beam are synchronized, the time starting point of the reception time pattern of the satellite's uplink beam is equal to the time starting point of the transmission time pattern of the satellite's downlink beam; optionally, the above-mentioned uplink and downlink delay deviation equal to 0 can be regarded as the transmission time pattern of the satellite's downlink beam and the reception time pattern of the satellite's uplink beam are synchronized. When the transmission time pattern of the satellite's downlink beam and the reception time pattern of the satellite's uplink beam are not synchronized, that is, when there is a delay deviation, the time starting point of the reception time pattern of the satellite's uplink beam is equal to the time starting point of the transmission time pattern of the satellite's downlink beam plus or minus the delay deviation.

[0190] 2. The uplink timing reference point is the ground network equipment

[0191] Optionally, in this case, the specific implementation of adjusting the time starting point of the transmission time pattern of the uplink beam of the satellite according to the transmission time pattern and the delay of the feeder link includes:

[0192] According to the time delay of the feeder link and the reception time pattern of the uplink beam of the ground network equipment, the time starting point of the reception time pattern of the uplink beam of the satellite is periodically adjusted.

[0193] Optionally, the time starting point of the reception time pattern of the uplink beam is the time starting point of the reception time pattern of the uplink beam of the ground network device minus the delay of the feeder link.

[0194] It should be noted that since the uplink timing reference point is the ground network equipment, it can be understood that the uplink and downlink of the ground network equipment are aligned. Since there is a feeder link delay in the transmission between the satellite and the ground, at this time, it is only necessary to ensure that the time starting point of the reception time pattern of the satellite's uplink beam is ahead of the time starting point of the reception time pattern of the uplink beam of the ground network equipment by a feeder link delay.

[0195] 2. The target network device is a ground network device

[0196] Optionally, in one implementation, the specific implementation of the delay adjustment transmission time pattern based on the feeder link includes at least one of the following:

[0197] B11, subtract the delay of the feeder link from the time starting point of the transmission time pattern of the satellite's downlink beam to determine the time starting point of the transmission time pattern of the downlink beam of the ground network device, the time starting point of the transmission time pattern of the downlink beam is dynamically adjusted based on the change of the delay of the feeder link, that is, the ground network device needs to send the downlink signal in advance by a time interval, and send it in sequence according to the transmission time pattern, and this interval is equal to the instantaneous feeder delay;

[0198] B12. Add the time starting point of the reception time pattern of the satellite's uplink beam to the delay of the feeder link to determine it as the time starting point of the reception time pattern of the uplink beam of the ground network equipment. The time starting point of the reception time pattern of the uplink beam is dynamically adjusted based on the change of the delay of the feeder link. That is, the ground network equipment delays the time point of uplink reception based on the feed delay, and then processes the uplink signal based on the reception time pattern.

[0199] It should be noted that since the satellite beam sends and receives signals according to a specified time pattern, and the ground network equipment is aware of the satellite's transmission time pattern, the ground network equipment only needs to adjust the time starting point of the downlink beam's sending time pattern to be earlier than the time starting point of the satellite's downlink beam's sending time pattern by a feeder link delay, and adjust the time starting point of the uplink beam's receiving time pattern to be later than the time starting point of the satellite's uplink beam's receiving time pattern by a feeder link delay, to ensure the consistency of the uplink and downlink of the two.

[0200] It should also be noted that, whether it is the onboard controller or the ground network equipment that performs the dynamic adjustment of the transmission time pattern, in order to ensure accurate transmission and reception on the terminal side, when the timing starting point of the satellite's transmission time pattern is adjusted, it is necessary to send the satellite beam transmission and reception timing adjustment time information and / or target signal to the terminal;

[0201] The satellite beam receiving and transmitting timing adjustment time includes the interval value of the beam transmission timing adjustment and / or the time starting point of the time adjustment, which is indicated by absolute time (such as Coordinated Universal Time (UTC)), or by system frame number (System frame number), subframe, time slot index, etc. Based on the above information, the terminal re-performs timing compensation at the corresponding time point, such as timing tracking based on the synchronization signal or reference information, and advances or lags the reception and transmission of the signal.

[0202] Optionally, the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal and a reference signal.

[0203] Optionally, the synchronization signal may be a synchronization signal / physical broadcast channel signal block (SynchronizationSignal and PBCH block, SSB), and the reference signal may be a channel state information reference signal (Channel StateInformation Reference Signal, CSI-RS) or a tracking reference signal (tracking referencesignal, TRS).

[0204] It should be noted that the time for the timing adjustment may be identification information (eg, number or index) of a frame, a subframe, a time slot or a symbol.

[0205] The specific application examples of the embodiments of the present application are described below.

[0206] Application 1: Onboard controller adjusts beam-hopping timing pattern

[0207] 1. Downlink beam control analysis

[0208] When the satellite moves, the delay of the feed link also changes, resulting in an irregular time interval between the ground base station and the satellite. If the satellite beam performs beam hopping scanning according to the fixed timing of the local time, when the satellite clock is consistent with the ground clock, the beam direction of the satellite beam will have changed when the ground base station signal reaches the satellite, such as Figure 6 As shown in the figure, assuming that the signal from the base station to the satellite differs by Δt, during this period the satellite needs to control the starting point of the beam scan (i.e., the time starting point), and needs to adjust the starting point of the beam scan to achieve synchronization between the base station signal and the satellite carrier beam signal. Due to the movement of the satellite, the time interval when the ground signal reaches the satellite is not completely consistent with the local time interval of the satellite.

[0209] In practical applications, the initial delay difference depends on the propagation delay difference between the satellite and the ground. The delay difference is in the order of milliseconds and can be compensated when the satellite and the base station initially establish a connection. After the feeder link between the satellite and the ground base station is connected, there will be time drift at regular intervals. This time deviation requires the satellite carrier beam controller to make timing adjustments.

[0210] In order to make the beam switching time of the satellite controller consistent with the beam switching time of the ground base station, the satellite controller needs to adjust the time point of beam transmission. The downlink beam control information that the ground base station or ground operation and control system needs to send to the satellite controller includes:

[0211] C11. Transmission time pattern of the downlink beam of the ground base station

[0212] Due to the satellite-to-ground delay and the signal processing delay of the satellite controller, the ground base station or ground control equipment needs to send the beam switching instruction to the satellite controller in advance, and then the satellite controller controls the antenna beam switching. Therefore, the ground base station or ground control equipment needs to send the transmission time pattern of the downlink beam to the satellite controller in advance, and the satellite controller can perform beam control according to the beam scanning time pattern.

[0213] C12: The starting point of the initial timing, based on which the satellite-to-ground time difference is determined by the onboard controller.

[0214] For example, the absolute time of the ground base station is T0. When the satellite clock is synchronized with the ground clock, considering that the satellite-ground delay is dela_T0, the ground base station starts sending data for different regions in the beam direction at T0, and the satellite performs beam scanning at T0+dela_T0, which happens to be when the signal from the ground base station reaches the satellite base station. Therefore, the satellite controller needs to coordinate with the ground base station to determine the time point from which to start calculating the time difference of the satellite-ground feeder link, so as to adjust the starting time of the signal transmission of the satellite beam.

[0215] C13, the adjustment interval value of the timing starting point of the transmission time pattern;

[0216] Due to the movement of the satellite, the delay of the feed link is constantly changing. Therefore, if the scanning starting time of the satellite-borne beam is controlled according to the time difference dela_T0 of the initial time, the satellite and ground time will be out of sync. Therefore, the satellite-borne controller needs to periodically adjust the timing starting point to keep the satellite-ground beam delay difference within a valid range.

[0217] For example, if the adjustment is made every 20ms, assuming that the time change rate of the feeder link is 20us / s, the delay change within 20ms is equal to 0.4us. When the subcarrier interval is 30khz, the cyclic prefix (CP) length is about 2.3us. Therefore, the timing start point is adjusted every 20ms, and the delay change is still within the CP range.

[0218] The channel format between the ground base station and the satellite controller may adopt the same transmission scheme as the wireless air interface between the terminal and the base station, or may adopt a dedicated channel format.

[0219] For the above-mentioned C12 and C13, the ground base station may not directly control the satellite controller, that is, it does not send information C12 and C13 to the satellite controller. The satellite controller only needs to adjust the transmission time pattern of the satellite beam in real time to meet the delay deviation within a time threshold. For example, the time difference between the satellite and the ground beam shall not be greater than 0.5us.

[0220] According to the above method, the downlink receiving time pattern of the terminal is synchronized and tracked according to the satellite signal, so as to maintain synchronization. Therefore, the satellite beam timing adjustment can be transparent to the terminal. However, the terminal receiving performance will be deteriorated in the following cases:

[0221] Case 1: The satellite beam timing adjustment does not keep up with the change in the feeder link delay.

[0222] At this time, the terminal's receiving signal timing is not aligned with the ground base station's sending timing, because the satellite's beam sending timing is not aligned with the ground base station, and there is a situation where the communication signal is partially intercepted, such as the first symbol of the receiving time period cannot be fully obtained. Therefore, the onboard controller must align the starting point of the onboard beam's sending time pattern with the starting point of the ground base station's signal transmission, that is, the time deviation must be within a small interval from the feed delay.

[0223] Case 2: The satellite beam periodically adjusts the timing starting point of each scanning time pattern.

[0224] Each time the start point of the beam timing transmission time changes, it will cause a sudden change in the terminal receiving signal, which may cause synchronization deviation in the first symbol reception of the beam transmission time pattern, resulting in performance degradation.

[0225] For the second case, the network should notify the terminal to perform synchronization correction every time the starting point of the satellite beam's timing transmission time is adjusted. There are several mechanisms:

[0226] C21. The ground base station notifies the terminal of the time of satellite beam receiving and transmitting timing adjustment each time the satellite beam is adjusted, usually in the form of subframe, time slot, or radio frame index information;

[0227] Specific implementation example: The ground base station determines the absolute time or relative time of each timing adjustment based on the transmission time pattern of the satellite beam, and notifies the terminal through high-level signaling (Radio Resource Control (RRC) signaling or Medium Access Control (MAC) signaling) to re-synchronize downlink from a certain radio frame, subframe or time slot index.

[0228] C22. The ground base station sends a synchronization signal and / or a reference signal to help the terminal perform synchronization correction every time the satellite beam is adjusted;

[0229] Specific implementation example: the synchronization signal is SSB, the reference signal is CSI-RS or TRS, and the transmission time of the synchronization signal and / or reference signal is in the starting symbol or symbol set of the transmission time pattern of the satellite beam. Furthermore, since different beam directions serve different users, SSB, CSI-RS, etc. can be sent in the starting subframe or time slot of each beam direction to help the terminal correct downlink synchronization.

[0230] 2. Uplink beam control analysis

[0231] The uplink timing adjustment of the terminal mainly includes the following two scenarios:

[0232] Scenario 1: Uplink timing reference point is on the satellite

[0233] At this time, the terminal only needs to compensate for the delay of the service link. Since the terminal's timing advance (TA) is adjusted using the downlink signal as a reference point, the terminal's uplink compensation is the same as the existing technology, that is, the uplink TA compensation only needs to compensate for twice the delay difference of the service link. At this time, the satellite controller's beam scanning time control of the uplink beam is consistent with the beam scanning control of the downlink beam, that is, the uplink beam scanning starting point needs to be periodically adjusted, and the downlink beam beam scanning time starting point is the same as the uplink beam scanning time starting point. When the terminal's signal reaches the ground base station, the ground base station's receiving time pattern has a delay difference of 2 times the feeding relative to the sending time pattern.

[0234] At this time, the behaviors of the onboard controller and the ground base station are as follows:

[0235] (1) Onboard controller: Based on the time starting point of the satellite's downlink beam transmission time pattern, determine the time starting point of the satellite's uplink beam reception time pattern. The time starting point of the uplink beam reception time pattern and the time starting point of the transmission time pattern can be aligned, such as Figure 7 As shown; the time starting point of the receiving time pattern of the uplink beam and the time starting point of the sending time pattern can also be configured to be misaligned, that is, there is an offset value. The main purpose is to support the terminal to feed back the uplink signal to the ground base station after receiving the downlink signal.

[0236] (2) Ground base station: The receiving time pattern of the ground base station is adjusted based on the delay of the feeder link. That is, the receiving time pattern of the uplink beam of the ground base station needs to be delayed by 2 times the delay of the feeder link than the receiving time pattern of the downlink beam of the ground base station. For example, Figure 8When there is a scanning time difference between the uplink and downlink of the satellite beam, it will also affect the beam scanning time difference of the base station, but will not affect the uplink delay compensation value.

[0237] Scenario 2: Uplink timing reference point at ground base station

[0238] The time points of the uplink subframe and downlink subframe of the ground base station are aligned. The terminal needs to compensate for the sum of the two delays of the service link and the feeder link. At this time, the satellite carrier beam controller needs to separately adjust the uplink reception beam hopping timing to ensure that the reception time pattern and the transmission time pattern of the ground base station are aligned.

[0239] When the uplink timing reference point is at the ground base station, the time starting point of the uplink beam reception time pattern needs to be advanced by 1 times the delay of the feeder link, resulting in a deviation in the downlink and uplink beam scanning times.

[0240] At this time, the onboard controller and the ground base station implement the following behaviors:

[0241] (1) Onboard controller: Based on the delay of the feeder link and the receiving time pattern of the uplink beam of the ground base station, the starting point of the receiving time pattern of the satellite uplink beam is adjusted. The receiving time pattern of the satellite uplink beam needs to compensate for the delay of the feeder link by 1. Compared with the downlink beam timing of the satellite, there is a timing deviation of 1 times the delay of the feeder link. At this time, the timing relationship is as follows: Fig. 9 At this time, the transmit and receive beam scanning timing diagrams on the base station side are aligned.

[0242] Similar to scenario 1, in order to support the working mode in which the terminal sends and receives signals in different time periods, the transmission time patterns of the ground base station's transmit and receive hopping beams may not be aligned. In this case, an additional offset value will be added to the uplink and downlink transmission time patterns of the satellite beam.

[0243] (2) Ground base station: No adjustment is required for the receiving time pattern, that is, no additional uplink delay compensation is required, and the sending time pattern is aligned with the receiving time pattern. However, the uplink and downlink scanning timing of the beam hopping can be adjusted based on needs.

[0244] Application 2: Time pattern adjustment of beam hopping by ground base station

[0245] When the ground base station makes beam hopping timing adjustments, it means that the time starting point of the satellite beam hopping transmission time pattern is sent according to the reference timing of the satellite itself, and the transmission time pattern is still controlled by the ground. The main problem to be solved at this time is the timing offset compensation of the feeder link. The ground base station must adapt to the timing reference of the satellite. Therefore, the ground base station needs to adjust the sending and receiving timing so that the beam on the satellite can be switched according to the scheduled time.

[0246] Since the satellite's beam receiving and transmitting timing is not adjusted, the downlink and uplink timing reference points should be set at the satellite node. Therefore, the base station compensates for the delay deviation of the feeder link during both the sending and receiving links, thereby maintaining the downlink and uplink signal synchronization of the satellite. The terminal will not be aware of changes in the delay of the feeder link.

[0247] For this solution, if the ground base station can accurately compensate for the timing offset of the signal, it will have no effect on the signal transmission performance of the terminal. If it is not possible to make real-time accurate adjustments, the terminal also needs to be notified to perform synchronous compensation. The ground base station can enhance synchronization performance in the following ways.

[0248] Mode 1: The ground base station notifies the terminal of the time information of the satellite beam receiving and sending timing adjustment each time the satellite beam is adjusted, which is usually the index information of the subframe, time slot, or radio frame, and also includes the periodic interval value of the timing adjustment;

[0249] Method 2: Every time the satellite beam is adjusted, the ground base station sends a synchronization signal or a reference signal to help the terminal perform synchronization correction;

[0250] When the ground base station performs timing compensation, it needs to send signals in advance on the transmitting link and receive signals at the delayed point of the receiving link to ensure the timing reference point on the satellite. The time difference between the transmitting time point and the receiving time point is 2 times the delay of the feeder link.

[0251] At this time, the satellite's beam transmission and reception time pattern is still controlled by the ground base station or ground operation and control system, and the beam time pattern is recorded. Based on actual needs, the satellite's beam service transmission time pattern and reception time pattern can be aligned or not.

[0252] The compensation method for the transmission time pattern of the ground base station is:

[0253] (1) The ground base station first periodically calculates the delay deviation value of the feeder link;

[0254] (2) The ground base station periodically adjusts the time starting point of the sending time pattern and the time starting point of the receiving time pattern based on the delay deviation value, so as to keep the time starting point of the sending and receiving time pattern of the satellite beam unchanged with the feeding delay.

[0255] (3) The delay of the ground base station's transmission adjustment is 1 times the delay of the feeder link, that is, the signal is sent 1 times the delay of the feeder link relative to the starting time of the satellite's transmission time pattern; the delay of the ground base station's reception adjustment is 1 times the delay of the feeder link, that is, the signal is sent 1 times the delay of the feeder link relative to the starting time of the satellite's reception time pattern.

[0256] The specific timing relationship is as follows Fig.10 shown.

[0257] Since the satellite uses beam hopping, the satellite beam must be sent and received according to the timing specified by the ground base station. Therefore, in order to keep the signal receiving and transmitting timing synchronized with the satellite's receiving and transmitting timing, the base station must periodically adjust the timing point of the beam's transmission time pattern. Therefore, the base station's time compensation value must also be adjusted periodically.

[0258] In summary, the embodiment of the present application provides a beam hopping control method, which mainly solves the beam hopping application problem of the satellite transparent forwarding mode and can effectively improve the satellite system capability of the transparent forwarding mode.

[0259] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0260] The terminal device involved in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs) and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, and a user device, but is not limited in the embodiments of the present application.

[0261] The network device involved in the embodiment of the present application may be a base station, which may include multiple cells providing services for the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, and serve as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (Global System for Mobile communications, GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (Home evolved Node B, HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0262] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or it can be diversity transmission, precoded transmission or beamforming transmission, etc.

[0263] Corresponding to the implementation of the target network device, such as Fig.11 As shown, an embodiment of the present application provides a beam control method, which is applied to a terminal, including:

[0264] Step S1101, obtaining time information and / or target signal for satellite beam receiving and transmitting timing adjustment;

[0265] Step S1102, transmitting a communication signal according to the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment;

[0266] The satellite beam transceiver timing adjustment time includes the interval value of the beam transmission timing adjustment and / or the time point of the time adjustment, which can be indicated by absolute time, or by system frame number, subframe, time slot index, etc. Based on the above information, the terminal re-performs timing compensation at the corresponding time point, such as timing tracking based on the synchronization signal or reference information, and advances or lags the transceiver of the signal.

[0267] The target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal and a reference signal.

[0268] Optionally, in one implementation, the acquiring the time information of the satellite beam receiving and transmitting timing adjustment and / or the target signal includes:

[0269] The satellite beam receiving and transmitting timing adjustment time information and / or target signal sent by the ground network equipment is received through the satellite.

[0270] It should be noted that all descriptions about the terminal in the above embodiments are applicable to the embodiments of the beam control method and can achieve the same technical effects, and will not be repeated here.

[0271] like Fig.12 As shown, the embodiment of the present application provides a beam control device 1200, which is applied to a target network device, including:

[0272] An adjusting unit 1201 is configured to adjust the timing relationship of a transmission time pattern based on a delay of a feeder link for a transparent forwarding mode, wherein the transmission time pattern includes: a sending time pattern and / or a receiving time pattern;

[0273] The target network device is a satellite-borne controller or a ground-based network device.

[0274] Optionally, when the target network device is a satellite-borne controller, before the adjusting unit 1201 adjusts the transmission time pattern based on the delay of the feeder link, the apparatus further includes:

[0275] A second acquisition unit, used to acquire control information, where the control information is used to indicate a transmission time pattern of a beam of a ground network device;

[0276] The transmission time pattern includes: a sending time pattern and / or a receiving time pattern.

[0277] Optionally, the adjusting unit 1201 is configured to:

[0278] Adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite according to the transmission time pattern and the time delay of the feeder link;

[0279] The uplink beam corresponds to the uplink service link from the terminal to the satellite and the uplink feeder link from the satellite to the ground network equipment, and the downlink beam corresponds to the downlink service link from the satellite to the terminal and the downlink feeder link from the ground network equipment to the satellite.

[0280] Optionally, the transmission time pattern of the uplink beam and / or the downlink beam satisfies at least one of the following:

[0281] Different subframes serve different beam areas;

[0282] Different time slots serve different beam areas;

[0283] Different symbols serve different beam areas.

[0284] Optionally, the control information is further used to indicate at least one of the following:

[0285] The starting point of the initial timing;

[0286] An adjustment interval value of a timing start point of a transmission time pattern;

[0287] The adjustment interval value of the timing start point of the transmission time pattern includes at least one of the following:

[0288] An adjustment interval value of a timing start point of a transmission time pattern of a downlink beam;

[0289] An adjustment interval value of a timing start point of a reception time pattern of an uplink beam;

[0290] The adjustment interval value of the timing starting point shared by the uplink beam and the downlink beam.

[0291] Optionally, the adjusting unit 1201 is configured to:

[0292] The time starting point of the transmission time pattern of the uplink beam or the downlink beam of the satellite is adjusted according to the adjustment interval value of the timing starting point of the transmission time pattern.

[0293] Optionally, a time starting point of a transmission time pattern of a downlink beam of the satellite is at least one feeder link delay longer than a time starting point of a transmission time pattern of a downlink beam of the ground network device.

[0294] Optionally, the adjusting unit 1201 is configured to:

[0295] In the case where the uplink timing reference point is a satellite, the time starting point of the reception time pattern of the satellite's uplink beam is determined based on the time starting point of the transmission time pattern of the satellite's downlink beam;

[0296] Among them, the sending time pattern of the downlink beam and the receiving time pattern of the uplink beam correspond to the service link, and the time starting point of the sending time pattern of the downlink beam of the satellite is one feeder link delay longer than the time starting point of the beam sending time pattern of the ground network device.

[0297] Optionally, the implementation method of determining the time starting point of the receiving time pattern of the uplink beam of the satellite based on the time starting point of the sending time pattern of the downlink beam of the satellite includes:

[0298] Determine the time starting point of the receiving time pattern of the satellite's uplink beam according to the time starting point of the sending time pattern of the satellite's downlink beam and the uplink and downlink delay deviation;

[0299] The uplink and downlink delay deviation is a value greater than or equal to 0.

[0300] Optionally, the adjusting unit 1201 is configured to:

[0301] When the uplink timing reference point is the ground network equipment, the time starting point of the reception time pattern of the satellite's uplink beam is periodically adjusted according to the delay of the feeder link and the reception time pattern of the uplink beam of the ground network equipment.

[0302] Optionally, the time starting point of the reception time pattern of the uplink beam is the time starting point of the reception time pattern of the uplink beam of the ground network device minus the delay of the feeder link.

[0303] Optionally, when the target network device is a ground network device, the adjusting unit 1201 is configured to implement at least one of the following:

[0304] Subtracting the delay of the feeder link from the time starting point of the transmission time pattern of the downlink beam of the satellite, the time starting point of the transmission time pattern of the downlink beam of the ground network device is determined as the time starting point of the transmission time pattern of the downlink beam, and the time starting point of the transmission time pattern of the downlink beam is dynamically adjusted based on the change of the delay of the feeder link;

[0305] The time starting point of the reception time pattern of the satellite's uplink beam is added to the delay of the feeder link to determine the time starting point of the reception time pattern of the uplink beam of the ground network device. The time starting point of the reception time pattern of the uplink beam is dynamically adjusted based on the change of the delay of the feeder link.

[0306] Optionally, the device further comprises:

[0307] A sending unit, configured to send, to the terminal, time information and / or a target signal for adjusting the timing of satellite beam transceiver timing when the timing starting point of the satellite transmission time pattern is adjusted;

[0308] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0309] It should be noted that the device embodiment is a device that corresponds one-to-one to the above-mentioned method embodiment. All implementation methods in the above-mentioned method embodiment are applicable to the device embodiment and can achieve the same technical effect.

[0310] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0311] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0312] like Fig.13 As shown, the embodiment of the present application further provides a network device, which is a target network device, including a processor 1300, a transceiver 1310, a memory 1320, and a program stored in the memory 1320 and executable on the processor 1300; wherein the transceiver 1310 is connected to the processor 1300 and the memory 1320 through a bus interface, wherein the processor 1300 is used to read the program in the memory and execute the following process:

[0313] For the transparent forwarding mode, adjusting the timing relationship of the transmission time pattern based on the delay of the feeder link, the transmission time pattern includes: a sending time pattern and / or a receiving time pattern;

[0314] The target network device is a satellite-borne controller or a ground-based network device.

[0315] The transceiver 1310 is configured to receive and send data under the control of the processor 1300 .

[0316] Among them, Fig.13 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 1300 and memory represented by memory 1320. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1310 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, including transmission media such as wireless channels, wired channels, optical cables, and the like.

[0317] The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 can store data used by the processor 1300 when performing operations.

[0318] Optionally, the processor 1300 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

[0319] The processor calls the computer program stored in the memory to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0320] Optionally, when the target network device is a satellite-borne controller, the processor, for reading the computer program in the memory, further performs the following operations:

[0321] Acquire control information, the control information being used to indicate a transmission time pattern of a beam of a ground network device;

[0322] The transmission time pattern includes: a sending time pattern and / or a receiving time pattern.

[0323] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0324] Adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite according to the transmission time pattern and the time delay of the feeder link;

[0325] The uplink beam corresponds to the uplink service link from the terminal to the satellite and the uplink feeder link from the satellite to the ground network equipment, and the downlink beam corresponds to the downlink service link from the satellite to the terminal and the downlink feeder link from the ground network equipment to the satellite.

[0326] Optionally, the transmission time pattern of the uplink beam and / or the downlink beam satisfies at least one of the following:

[0327] Different subframes serve different beam areas;

[0328] Different time slots serve different beam areas;

[0329] Different symbols serve different beam areas.

[0330] Optionally, the control information is further used to indicate at least one of the following:

[0331] The starting point of the initial timing;

[0332] An adjustment interval value of a timing start point of a transmission time pattern;

[0333] The adjustment interval value of the timing start point of the transmission time pattern includes at least one of the following:

[0334] An adjustment interval value of a timing start point of a transmission time pattern of a downlink beam;

[0335] An adjustment interval value of a timing start point of a reception time pattern of an uplink beam;

[0336] The adjustment interval value of the timing starting point shared by the uplink beam and the downlink beam.

[0337] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0338] The time starting point of the transmission time pattern of the uplink beam or the downlink beam of the satellite is adjusted according to the adjustment interval value of the timing starting point of the transmission time pattern.

[0339] Optionally, a time starting point of a transmission time pattern of a downlink beam of the satellite is at least one feeder link delay longer than a time starting point of a transmission time pattern of a downlink beam of the ground network device.

[0340] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0341] In the case where the uplink timing reference point is a satellite, the time starting point of the reception time pattern of the satellite's uplink beam is determined based on the time starting point of the transmission time pattern of the satellite's downlink beam;

[0342] Among them, the sending time pattern of the downlink beam and the receiving time pattern of the uplink beam correspond to the service link, and the time starting point of the sending time pattern of the downlink beam of the satellite is one feeder link delay longer than the time starting point of the beam sending time pattern of the ground network device.

[0343] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0344] Determine the time starting point of the receiving time pattern of the satellite's uplink beam according to the time starting point of the sending time pattern of the satellite's downlink beam and the uplink and downlink delay deviation;

[0345] The uplink and downlink delay deviation is a value greater than or equal to 0.

[0346] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0347] When the uplink timing reference point is the ground network equipment, the time starting point of the reception time pattern of the satellite's uplink beam is periodically adjusted according to the delay of the feeder link and the reception time pattern of the uplink beam of the ground network equipment.

[0348] Optionally, the time starting point of the reception time pattern of the uplink beam is the time starting point of the reception time pattern of the uplink beam of the ground network device minus the delay of the feeder link.

[0349] Optionally, when the target network device is a ground network device, the processor is configured to read the computer program in the memory and perform at least one of the following operations:

[0350] Subtracting the delay of the feeder link from the time starting point of the transmission time pattern of the downlink beam of the satellite, the time starting point of the transmission time pattern of the downlink beam of the ground network device is determined as the time starting point of the transmission time pattern of the downlink beam, and the time starting point of the transmission time pattern of the downlink beam is dynamically adjusted based on the change of the delay of the feeder link;

[0351] The time starting point of the reception time pattern of the satellite's uplink beam is added to the delay of the feeder link to determine the time starting point of the reception time pattern of the uplink beam of the ground network device. The time starting point of the reception time pattern of the uplink beam is dynamically adjusted based on the change of the delay of the feeder link.

[0352] Optionally, the processor, for reading the computer program in the memory, further performs the following operations:

[0353] In case that the timing starting point of the satellite's transmission time pattern is adjusted, sending the satellite beam receiving and transmitting timing adjustment time information and / or the target signal to the terminal;

[0354] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0355] It should be noted here that the above-mentioned network device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0356] The embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of a beam control method applied to a target network device. The processor-readable storage medium may be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0357] like Fig.14 As shown, the embodiment of the present application provides a beam control device 1400, which is applied to a terminal, including:

[0358] The first acquisition unit 1401 is used to acquire the time information of the satellite beam receiving and transmitting timing adjustment and / or the target signal;

[0359] The transmission unit 1402 is used to transmit the communication signal according to the time information and / or the target signal of the satellite beam receiving and transmitting timing adjustment;

[0360] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0361] Optionally, the first acquiring unit 1401 is configured to:

[0362] The satellite beam receiving and transmitting timing adjustment time information and / or target signal sent by the ground network equipment is received through the satellite.

[0363] It should be noted that the device embodiment is a device that corresponds one-to-one to the above-mentioned method embodiment. All implementation methods in the above-mentioned method embodiment are applicable to the device embodiment and can achieve the same technical effect.

[0364] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0365] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0366] like Fig.15 As shown, the embodiment of the present application further provides a terminal, including a processor 1500, a transceiver 1510, a memory 1520, and a program stored in the memory 1520 and executable on the processor 1500; wherein the transceiver 1510 is connected to the processor 1500 and the memory 1520 through a bus interface, wherein the processor 1500 is used to read the program in the memory and execute the following process:

[0367] Acquire time information and / or target signal for satellite beam transmit / receive timing adjustment;

[0368] Transmitting communication signals according to the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment;

[0369] Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

[0370] The transceiver 1510 is configured to receive and send data under the control of the processor 1500 .

[0371] Among them, Fig.15In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1500 and various circuits of memory represented by memory 1520 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1510 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which may include wireless channels, wired channels, optical cables, and other transmission media. For different user devices, the user interface 1530 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0372] The processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 can store data used by the processor 1500 when performing operations.

[0373] Optionally, the processor 1500 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

[0374] The processor calls the computer program stored in the memory to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0375] Optionally, the processor, for reading the computer program in the memory, further performs the following operations:

[0376] The satellite beam receiving and transmitting timing adjustment time information and / or target signal sent by the ground network equipment is received through the satellite.

[0377] At least one embodiment of the present application also provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, each process in the carrier switching method embodiment applied to the terminal device is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0378] At least one embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, each process in the embodiment of the beam control method applied to the terminal as described above is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0379] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0380] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0381] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0382] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1The steps for the functions specified in one or more boxes.

[0383] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A beam steering method, characterized in that: Performed by the target network device, including: For the transparent forwarding mode, adjusting the timing relationship of the transmission time pattern based on the delay of the feeder link, the transmission time pattern includes: a sending time pattern and / or a receiving time pattern; The target network device is a satellite-borne controller or a ground-based network device.

2. The method according to claim 1, characterized in that In the case where the target network device is a satellite-borne controller, the method further includes: Acquire control information, the control information being used to indicate a transmission time pattern of a beam of a ground network device; The transmission time pattern includes: a sending time pattern and / or a receiving time pattern.

3. The method according to claim 2, characterized in that The delay adjustment of the feeder link-based transmission time pattern timing relationship includes: Adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite according to the transmission time pattern and the time delay of the feeder link; The uplink beam corresponds to the uplink service link from the terminal to the satellite and the uplink feeder link from the satellite to the ground network equipment, and the downlink beam corresponds to the downlink service link from the satellite to the terminal and the downlink feeder link from the ground network equipment to the satellite.

4. The method according to claim 3, characterized in that The transmission time pattern of the uplink beam and / or the downlink beam satisfies at least one of the following: Different subframes serve different beam areas; Different time slots serve different beam areas; Different symbols serve different beam areas.

5. The method according to claim 3, characterized in that: The control information is further used to indicate at least one of the following: The starting point of the initial timing; An adjustment interval value of a timing start point of a transmission time pattern; The adjustment interval value of the timing start point of the transmission time pattern includes at least one of the following: An adjustment interval value of a timing start point of a transmission time pattern of a downlink beam; An adjustment interval value of a timing start point of a reception time pattern of an uplink beam; The adjustment interval value of the timing starting point shared by the uplink beam and the downlink beam.

6. The method according to claim 5, characterized in that The step of adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite comprises: The time starting point of the transmission time pattern of the uplink beam or the downlink beam of the satellite is adjusted according to the adjustment interval value of the timing starting point of the transmission time pattern.

7. The method according to claim 6, characterized in that A time starting point of a transmission time pattern of a downlink beam of the satellite is at least one feeder link delay longer than a time starting point of a transmission time pattern of a downlink beam of the ground network device.

8. The method according to claim 3, characterized in that According to the transmission time pattern and the time delay of the feed link, adjusting the time starting point of the transmission time pattern of the uplink beam of the satellite comprises: In the case where the uplink timing reference point is a satellite, the time starting point of the reception time pattern of the satellite's uplink beam is determined based on the time starting point of the transmission time pattern of the satellite's downlink beam; Among them, the sending time pattern of the downlink beam and the receiving time pattern of the uplink beam correspond to the service link, and the time starting point of the sending time pattern of the downlink beam of the satellite is one feeder link delay longer than the time starting point of the beam sending time pattern of the ground network device.

9. The method according to claim 8, characterized in that The step of determining the time starting point of the receiving time pattern of the uplink beam of the satellite based on the time starting point of the sending time pattern of the downlink beam of the satellite comprises: Determine the time starting point of the receiving time pattern of the satellite's uplink beam according to the time starting point of the sending time pattern of the satellite's downlink beam and the uplink and downlink delay deviation; The uplink and downlink delay deviation is a value greater than or equal to 0.

10. The method according to claim 3, characterized in that: According to the transmission time pattern and the time delay of the feed link, adjusting the time starting point of the transmission time pattern of the uplink beam of the satellite comprises: When the uplink timing reference point is the ground network equipment, the time starting point of the reception time pattern of the satellite's uplink beam is periodically adjusted according to the delay of the feeder link and the reception time pattern of the uplink beam of the ground network equipment.

11. The method according to claim 10, characterized in that The time starting point of the reception time pattern of the uplink beam is the time starting point of the reception time pattern of the uplink beam of the ground network device minus the delay of the feeder link.

12. The method according to claim 1, characterized in that In the case where the target network device is a terrestrial network device, the timing relationship of the delay adjustment transmission time pattern based on the feeder link includes at least one of the following: Subtracting the delay of the feeder link from the time starting point of the transmission time pattern of the downlink beam of the satellite, the time starting point of the transmission time pattern of the downlink beam of the ground network device is determined as the time starting point of the transmission time pattern of the downlink beam, and the time starting point of the transmission time pattern of the downlink beam is dynamically adjusted based on the change of the delay of the feeder link; The time starting point of the reception time pattern of the satellite's uplink beam is added to the delay of the feeder link to determine the time starting point of the reception time pattern of the uplink beam of the ground network device. The time starting point of the reception time pattern of the uplink beam is dynamically adjusted based on the change of the delay of the feeder link.

13. The method according to claim 1, characterized in that Also includes: In case that the timing starting point of the satellite's transmission time pattern is adjusted, sending the satellite beam receiving and transmitting timing adjustment time information and / or the target signal to the terminal; Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

14. A beam control method, characterized in that: Executed by the terminal, including: Acquire time information and / or target signal for satellite beam transmit / receive timing adjustment; Transmitting communication signals according to the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment; Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

15. The method according to claim 14, characterized in that The obtaining of the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment comprises: The satellite beam receiving and transmitting timing adjustment time information and / or target signal sent by the ground network equipment is received through the satellite.

16. A network device, the network device being a target network device, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: For the transparent forwarding mode, adjusting the timing relationship of the transmission time pattern based on the delay of the feeder link, the transmission time pattern includes: a sending time pattern and / or a receiving time pattern; The target network device is a satellite-borne controller or a ground-based network device.

17. The network device according to claim 16, characterized in that: In the case where the target network device is a satellite-borne controller, the processor is configured to read the computer program in the memory and further perform the following operations: Acquire control information, the control information being used to indicate a transmission time pattern of a beam of a ground network device; The transmission time pattern includes: a sending time pattern and / or a receiving time pattern.

18. The network device according to claim 17, characterized in that: The processor is configured to read the computer program in the memory and perform the following operations: Adjusting the time starting point of the transmission time pattern of the uplink beam and / or downlink beam of the satellite according to the transmission time pattern and the time delay of the feeder link; The uplink beam corresponds to the uplink service link from the terminal to the satellite and the uplink feeder link from the satellite to the ground network equipment, and the downlink beam corresponds to the downlink service link from the satellite to the terminal and the downlink feeder link from the ground network equipment to the satellite.

19. The network device according to claim 18, characterized in that: The transmission time pattern of the uplink beam and / or the downlink beam satisfies at least one of the following: Different subframes serve different beam areas; Different time slots serve different beam areas; Different symbols serve different beam areas.

20. The network device according to claim 18, characterized in that: The control information is further used to indicate at least one of the following: The starting point of the initial timing; An adjustment interval value of a timing start point of a transmission time pattern; The adjustment interval value of the timing start point of the transmission time pattern includes at least one of the following: An adjustment interval value of a timing start point of a transmission time pattern of a downlink beam; An adjustment interval value of a timing start point of a reception time pattern of an uplink beam; The adjustment interval value of the timing starting point shared by the uplink beam and the downlink beam.

21. The network device according to claim 20, characterized in that: The processor is configured to read the computer program in the memory and perform the following operations: The time starting point of the transmission time pattern of the uplink beam or the downlink beam of the satellite is adjusted according to the adjustment interval value of the timing starting point of the transmission time pattern.

22. The network device according to claim 21, characterized in that: A time starting point of a transmission time pattern of a downlink beam of the satellite is at least one feeder link delay longer than a time starting point of a transmission time pattern of a downlink beam of the ground network device.

23. The network device according to claim 18, characterized in that: The processor is configured to read the computer program in the memory and perform the following operations: In the case where the uplink timing reference point is a satellite, the time starting point of the reception time pattern of the satellite's uplink beam is determined based on the time starting point of the transmission time pattern of the satellite's downlink beam; Among them, the sending time pattern of the downlink beam and the receiving time pattern of the uplink beam correspond to the service link, and the time starting point of the sending time pattern of the downlink beam of the satellite is one feeder link delay longer than the time starting point of the beam sending time pattern of the ground network device.

24. The network device according to claim 23, characterized in that: The processor is configured to read the computer program in the memory and perform the following operations: Determine the time starting point of the receiving time pattern of the satellite's uplink beam according to the time starting point of the sending time pattern of the satellite's downlink beam and the uplink and downlink delay deviation; The uplink and downlink delay deviation is a value greater than or equal to 0.

25. The network device according to claim 18, characterized in that: The processor is configured to read the computer program in the memory and perform the following operations: When the uplink timing reference point is the ground network equipment, the time starting point of the reception time pattern of the satellite's uplink beam is periodically adjusted according to the delay of the feeder link and the reception time pattern of the uplink beam of the ground network equipment.

26. The network device according to claim 25, characterized in that: The time starting point of the reception time pattern of the uplink beam is the time starting point of the reception time pattern of the uplink beam of the ground network device minus the delay of the feeder link.

27. The network device according to claim 16, characterized in that: In the case where the target network device is a ground network device, the processor is configured to read the computer program in the memory and perform at least one of the following operations: Subtracting the delay of the feeder link from the time starting point of the transmission time pattern of the downlink beam of the satellite, the time starting point of the transmission time pattern of the downlink beam of the ground network device is determined as the time starting point of the transmission time pattern of the downlink beam, and the time starting point of the transmission time pattern of the downlink beam is dynamically adjusted based on the change of the delay of the feeder link; The time starting point of the reception time pattern of the satellite's uplink beam is added to the delay of the feeder link to determine the time starting point of the reception time pattern of the uplink beam of the ground network device. The time starting point of the reception time pattern of the uplink beam is dynamically adjusted based on the change of the delay of the feeder link.

28. The network device according to claim 16, characterized in that: The processor is configured to read the computer program in the memory and further perform the following operations: In case that the timing starting point of the satellite's transmission time pattern is adjusted, sending the satellite beam receiving and transmitting timing adjustment time information and / or the target signal to the terminal; Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

29. A terminal, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Acquire time information and / or target signal for satellite beam transmit / receive timing adjustment; Transmitting communication signals according to the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment; Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

30. The terminal according to claim 29, characterized in that The processor is configured to read the computer program in the memory and further perform the following operations: The satellite beam receiving and transmitting timing adjustment time information and / or target signal sent by the ground network equipment is received through the satellite.

31. A beam control device, applied to a target network device, characterized in that: include: An adjustment unit, configured to adjust the timing relationship of a transmission time pattern based on a delay of a feeder link for a transparent forwarding mode, wherein the transmission time pattern includes: a transmission time pattern and / or a reception time pattern; The target network device is a satellite-borne controller or a ground-based network device.

32. A beam control device, applied to a terminal, characterized in that: include: A first acquisition unit is used to acquire time information and / or a target signal for adjusting the timing of satellite beam reception and transmission; A transmission unit, configured to transmit a communication signal according to the time information and / or target signal of the satellite beam receiving and transmitting timing adjustment; Among them, the time information of the timing adjustment includes the interval value of the satellite beam transmission timing adjustment and / or the time point of the time adjustment; the target signal is used for the terminal to perform synchronization correction, and the target signal includes at least one of the following: a synchronization signal, a reference signal.

33. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method according to any one of claims 1 to 15.

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