A method and system for searching and rescuing a lost flying object

Abstract

The present invention discloses a lost flying object search and rescue method and system applied to flying objects, the method comprising: obtaining emergency call SSB configuration information and emergency PC I information of the accessed NR cell; the emergency call SSB configuration information is set according to the remaining SSB of the NR cell; if the network of the NR cell loses synchronization, the emergency PC I information is sent at a specified location according to the emergency call SSB configuration information; when the emergency PC I information is received by other normal flying objects, the other normal flying objects are notified to report the search and rescue information corresponding to the emergency PC I information to the search and rescue system. The present invention allows the lost flying object to send the emergency PC I information in the idle SSB resource area, and then the normally working flying object transmits the emergency PC I information back to the system, so as to realize the discovery of the faulty flying object without adding or modifying the communication system architecture of the NR cell.

Description

Technical Field

[0001] The present invention relates to the field of flying objects, and in particular to a search and rescue method and system for lost flying objects. Background Art

[0002] Low-altitude airspace usually refers to the airspace within 1,000 meters vertically below the ground. There are many types of aircraft in low-altitude airspace: industrial flying objects, such as the plant protection flying objects launched by DJI; cargo flying objects, such as Meituan takeaway flying objects; eVTOL, such as manned small aircraft, etc. In order to provide communication services for low-altitude flying objects and meet the regulatory authorities' monitoring of low-altitude flying objects, some NR networks with low-altitude coverage will be deployed.

[0003] There is currently no good solution for missing flying objects. The only way is to manually search for them based on the coordinates of the last reported position of the flying object. However, since GPS information may fail and the flying object cannot be reported, it is impossible to search and rescue the missing flying object in some scenarios. Summary of the invention

[0004] An embodiment of the present invention provides a lost flying object search and rescue method and system applied to flying objects. The lost flying object sends emergency PCI information in an idle SSB resource area, and then the normally working flying object transmits the emergency PCI information back to the system, thereby realizing the discovery of the faulty flying object without adding or modifying the communication system architecture of the NR cell.

[0005] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a lost flying object search and rescue method applied to a flying object, comprising:

[0006] Obtain emergency call SSB configuration information and emergency PC I information of the accessed NR cell; the emergency call SSB configuration information is set according to the remaining SSB of the NR cell;

[0007] If synchronization with the network of the NR cell is lost, sending the emergency PC I information at a specified location according to the emergency call SSB configuration information;

[0008] When the emergency PC I information is received by other normal flying objects, other normal flying objects are notified to report the search and rescue information corresponding to the emergency PC I information to the search and rescue system.

[0009] In a possible implementation manner of the first aspect, before obtaining the emergency call SSB configuration information and emergency PC I information of the accessed NR cell, the method further includes:

[0010] According to the system design of the search and rescue system in the NR cell, the number of SSB beams in the target coverage scenario is confirmed, and all unused remaining SSBs of the NR cell are obtained;

[0011] Using one SSB position or multiple SSB positions in the remaining SSB as the time domain transmission position in the emergency call SSB configuration information;

[0012] The frequency domain of the SSB beam in the target coverage scenario is used as the frequency domain transmission position in the emergency call SSB configuration information;

[0013] The period of the SSB beam in the target coverage scenario is used as the period information in the emergency call SSB configuration information.

[0014] In a possible implementation manner of the first aspect, obtaining emergency PCI information specifically includes:

[0015] Obtain emergency PCI information from the search and rescue system, which is generated by the search and rescue system based on equipment information.

[0016] In a possible implementation manner of the first aspect, the losing synchronization with the network of the NR cell specifically includes:

[0017] The synchronization signal of the NR cell cannot be periodically detected in the downlink; or,

[0018] The TA timing command cannot be received periodically from the base station side in the uplink.

[0019] In a possible implementation manner of the first aspect, sending the emergency PCI information at a specified location according to the emergency call SSB configuration information specifically includes:

[0020] Confirm the frequency domain transmission position, time domain transmission position and period information in the emergency call SSB configuration information;

[0021] The emergency PCI information is periodically sent at a position jointly designated by the frequency domain sending position and the time domain sending position according to the period information.

[0022] In a possible implementation manner of the first aspect, when the emergency PCI information is received by other normal flying objects, notifying the other normal flying objects to report the search and rescue information corresponding to the emergency PCI information to the search and rescue system specifically includes:

[0023] After the emergency PCI information is received by other normal flying objects, the other normal flying objects integrate the coordinate information and abnormal state of the flying object that sent the emergency PCI information into search and rescue information;

[0024] Other normal flying objects report the search and rescue information to the search and rescue system.

[0025] In a possible implementation manner of the first aspect, before the other normal flying objects report the search and rescue information to the search and rescue system, the method further includes:

[0026] Other normal flying objects add the SSB signal strength and azimuth information corresponding to the emergency PC I information to the search and rescue information.

[0027] A second aspect of an embodiment of the present application provides a lost flying object search and rescue system, including:

[0028] A configuration module is used to configure the emergency call SSB configuration information and the corresponding emergency PC I information to each flying object; it is also used to configure all unused remaining SSB information of the NR cell and the emergency PC I information corresponding to each flying object to the base station system;

[0029] The receiving module is used to receive the search and rescue information uploaded by the normal flying objects; the search and rescue information generation process is as follows: a flying object loses synchronization with the network of the NR cell, and the flying object sends the corresponding emergency PC I information at the designated location according to the corresponding emergency call SSB configuration information; when the emergency PC I information is received by other normal flying objects, the other normal flying objects report the search and rescue information corresponding to the emergency PC I information to the search and rescue system.

[0030] In a possible implementation manner of the second aspect, the method further includes:

[0031] The emergency PCI definition module is used to set the corresponding PCI for each flying object according to the type of flying object and the corresponding actual use.

[0032] In a possible implementation of the second aspect, the emergency call SSB generation module is used to confirm the number of SSB beams in the target coverage scenario according to the system design of the search and rescue system in the NR cell, and obtain all the remaining unused SSBs of the NR cell; use one SSB position or multiple SSB positions among the remaining SSBs as the time domain sending position in the emergency call SSB configuration information; use the frequency domain of the SSB beam in the target coverage scenario as the frequency domain sending position in the emergency call SSB configuration information; and use the period of the SSB beam in the target coverage scenario as the period information in the emergency call SSB configuration information.

[0033] Compared with the prior art, the embodiment of the present invention provides a lost flying object search and rescue method and system for flying objects. After the flying object accesses the NR cell, the NR cell or the search and rescue system will configure the emergency call SSB configuration information for the flying object and determine the emergency PCI information sent when the flying object loses synchronization and makes an emergency call. After the flying object loses connection, the emergency PCI information will be periodically sent out at the time domain position and frequency domain position specified by the emergency call SSB configuration information. Since the channel occupied by the emergency PCI information is the idle SSB channel of the NR cell, other flying objects working normally will always obtain the SSB signal of the NR cell on the SSB broadcast channel after accessing the NR cell. Therefore, when receiving the information on all SSB broadcast channels, the emergency PCI information sent by the lost flying object will be received together, and the lost flying object will be found for subsequent rescue. The whole process utilizes the idle SSB channel resources of the original NR cell, minimizes the impact on normal flying objects, and realizes the detection of abnormal flying objects, and does not need to rely on other external equipment or change the communication network architecture of the NR cell.

[0034] In summary, the present invention utilizes a normally functioning flying object to "sense" a faulty flying object, and then the normally functioning flying object transmits relevant information back to the system, thereby realizing the discovery of the faulty flying object. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A flowchart of a lost flying object search and rescue method applied to a flying object is provided in accordance with an embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of a time domain sending position in emergency call SSB configuration information provided by an embodiment of the present invention;

[0037] Figure 3 It is a schematic diagram of a lost flying object sending emergency PCI information according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In order to provide communication services for low-altitude flying objects and meet the monitoring requirements of regulatory agencies on low-altitude flying objects, some low-altitude coverage networks will be deployed. The present invention is described using the NR system as an example. In actual deployment, other systems can be used for coverage.

[0040] See also Figure 1 An embodiment of the present invention provides a lost flying object search and rescue method applied to a flying object, comprising:

[0041] S10. Obtain the emergency call SSB configuration information and emergency PC I information of the accessed NR cell; the emergency call SSB configuration information is set according to the remaining SSB of the NR cell.

[0042] S11. If the network synchronization with the NR cell is lost, the emergency PC I information is sent at a designated location according to the emergency call SSB configuration information.

[0043] S12. When the emergency PC I information is received by other normal flying objects, notify other normal flying objects to report the search and rescue information corresponding to the emergency PC I information to the search and rescue system.

[0044] The flying object is powered on to obtain downlink synchronization. After reading the broadcast message of the NR cell, it can obtain the PCI of the cell. If the flying object needs to establish a wireless link with the base station of the NR cell, it will enter the connected state. The flying object in the connected state will always read the SSB resources of the cell to determine whether the current NR cell is "suitable to continue service".

[0045] After the flying object is connected, it needs to keep synchronized with the NR cell network. In S11, if the flying object cannot receive downlink synchronization or uplink timing commands, the flying object is considered to be "lost". After losing contact, the flying object broadcasts emergency PCI information on the idle SSB channel according to the emergency call SSB configuration information. Therefore, other flying objects will always measure the information of normal cells at the broadcast position. Therefore, in S12, they can also receive the emergency PCI information generated by this emergency call. Normal flying objects generate a distress message based on the emergency PCI information and send it back to the base station, including the current coordinates, time, and status of the abnormal flying object.

[0046] It should be noted that the process of flying objects accessing the system is a random access process, that is, by reading the air interface cell broadcast cell, the basic information of the cell can be obtained, including the time-frequency position and period of the broadcast message. In the NR cell, the time-frequency position and period of the broadcast cell are fixed after the NR cell is established.

[0047] Since most of the current NR cells are in TDD mode, that is, the receiving and transmitting frequency bands are the same, the communication device of the flying object does not need to make hardware changes. According to the 3GPP protocol requirements, the flying object terminal needs to monitor the SSB information all the time. Therefore, the "signal" detection of abnormal flying objects by normal flying objects does not require changes to the current hardware. If the "emergency PC I information" is broadcasted at other time and frequency positions outside the idle SSB channel, all terminals will be required to detect this specific position, which will bring additional requirements, increase the cost of the terminal, and have poor compatibility.

[0048] Compared with the prior art, the embodiment of the present invention provides a lost flying object search and rescue method for flying objects. After the flying object accesses the NR cell, the NR cell or the search and rescue system will configure the emergency call SSB configuration information for the flying object and determine the emergency PCI information sent when the flying object loses synchronization and makes an emergency call. After the flying object loses connection, the emergency PCI information will be periodically sent out at the time domain position and frequency domain position specified by the emergency call SSB configuration information. Since the channel occupied by the emergency PCI information is the idle SSB channel of the NR cell, other flying objects working normally will always obtain the SSB signal of the NR cell on the SSB broadcast channel after accessing the NR cell. Therefore, when receiving the information on all SSB broadcast channels, the emergency PCI information sent by the lost flying object will be received together, and the lost flying object will be found for subsequent rescue. The whole process utilizes the idle SSB channel resources of the original NR cell, minimizes the impact on normal flying objects, and realizes the detection of abnormal flying objects, and does not need to rely on other external equipment or change the communication network architecture of the NR cell.

[0049] In summary, the present invention utilizes a normally functioning flying object to "sense" a faulty flying object, and then the normally functioning flying object transmits relevant information back to the system, thereby realizing the discovery of the faulty flying object.

[0050] Exemplarily, before S10, the method further includes:

[0051] According to the system design of the search and rescue system in the NR cell, the number of SSB beams in the target coverage scenario is confirmed, and all unused remaining SSBs of the NR cell are obtained.

[0052] One SSB position or multiple SSB positions among the remaining SSBs are used as the time domain sending position in the emergency call SSB configuration information.

[0053] The frequency domain of the SSB beam in the target coverage scenario is used as the frequency domain sending position in the emergency call SSB configuration information.

[0054] The period of the SSB beam in the target coverage scenario is used as the period information in the emergency call SSB configuration information.

[0055] The 3GPP protocol defines the time domain locations of multiple SSBs. In actual communication systems, the base station side schedules which SSB resource locations to use based on hardware capabilities, signal coverage, target coverage area, etc. For example, when the SSB beam is wide, only part of the SSB's time domain resources are needed to meet NR cell coverage. Figure 2 In this embodiment, all the remaining unused SSBs in the NR cell are used as channel resources for each flying object to send emergency PC I information (emergency call after loss of connection). Since the emergency call SSB configuration information includes the time domain transmission position, frequency domain transmission position and period information, the lost flying object can legally send the emergency PC I information according to the emergency call SSB configuration information and allow other flying objects working normally to discover the emergency PC I information together when receiving the cell SSB signal.

[0056] Exemplarily, obtaining emergency PCI information specifically includes:

[0057] Obtain emergency PCI information from the search and rescue system, which is generated by the search and rescue system based on equipment information.

[0058] In actual applications, the search and rescue system can define multiple different PCIs based on needs to express different meanings. For example, different companies define different PCIs, see the table below.

[0059] Table 1 Enterprise PCI definition table

[0060] Company Name PCI A 100 B 101

[0061] Exemplarily, the losing synchronization with the network of the NR cell specifically includes:

[0062] The synchronization signal of the NR cell cannot be periodically detected in the downlink; or,

[0063] The TA timing command cannot be received periodically from the base station side in the uplink.

[0064] The synchronization method means that the downlink needs to be able to periodically detect the synchronization signal of the NR cell, and the uplink can periodically receive the TA timing command from the base station side.

[0065] Exemplarily, sending the emergency PCI information at a specified location according to the emergency call SSB configuration information specifically includes:

[0066] Confirm the frequency domain transmission position, time domain transmission position and period information in the emergency call SSB configuration information;

[0067] The emergency PCI information is periodically sent at a position jointly designated by the frequency domain sending position and the time domain sending position according to the period information.

[0068] For example, see Figure 3 When the emergency PCI information is received by other normal flying objects, the other normal flying objects are notified to report the search and rescue information corresponding to the emergency PCI information to the search and rescue system, specifically including:

[0069] After the emergency PCI information is received by other normal flying objects, the other normal flying objects integrate the coordinate information and abnormal state of the flying object that sent the emergency PCI information into search and rescue information;

[0070] Other normal flying objects report the search and rescue information to the search and rescue system.

[0071] Exemplarily, before the other normal flying object reports the search and rescue information to the search and rescue system, the method further includes:

[0072] Other normal flying objects add the SSB signal strength and azimuth information corresponding to the emergency PC I information to the search and rescue information.

[0073] Compared with the prior art, the embodiment of the present invention provides a lost flying object search and rescue method for flying objects. After the flying object accesses the NR cell, the NR cell or the search and rescue system will configure the emergency call SSB configuration information for the flying object and determine the emergency PCI information sent when the flying object loses synchronization and makes an emergency call. After the flying object loses connection, the emergency PCI information will be periodically sent out at the time domain position and frequency domain position specified by the emergency call SSB configuration information. Since the channel occupied by the emergency PCI information is the idle SSB channel of the NR cell, other flying objects working normally will always obtain the SSB signal of the NR cell on the SSB broadcast channel after accessing the NR cell. Therefore, when receiving the information on all SSB broadcast channels, the emergency PCI information sent by the lost flying object will be received together, and the lost flying object will be found for subsequent rescue. The whole process utilizes the idle SSB channel resources of the original NR cell, minimizes the impact on normal flying objects, and realizes the detection of abnormal flying objects, and does not need to rely on other external equipment or change the communication network architecture of the NR cell.

[0074] In summary, the present invention utilizes a normally functioning flying object to "sense" a faulty flying object, and then the normally functioning flying object transmits relevant information back to the system, thereby realizing the discovery of the faulty flying object.

[0075] An embodiment of the present application provides a lost flying object search and rescue system, including: a configuration module and a receiving module.

[0076] A configuration module is used to configure the emergency call SSB configuration information and the corresponding emergency PCI information to each flying object; and is also used to configure all unused remaining SSB information of the NR cell and the emergency PCI information corresponding to each flying object to the base station system;

[0077] The receiving module is used to receive the search and rescue information uploaded by the normal flying objects; the search and rescue information generation process is as follows: a flying object loses synchronization with the network of the NR cell, and the flying object sends the corresponding emergency PCI information at the designated location according to the corresponding emergency call SSB configuration information; when the emergency PCI information is received by other normal flying objects, the other normal flying objects report the search and rescue information corresponding to the emergency PCI information to the search and rescue system.

[0078] In this embodiment, the search and rescue system configures the emergency PCI information and location information to the flying object; the search and rescue system configures the number and location of valid SSBs to the base station system. After that, the ground base station sends SSBs at the designated location and reserves the location SSB of the emergency call without sending information.

[0079] When the flying object is connected to the system, the NR cell broadcast of the private network is read and its frequency domain position is recorded. When the flying object fails, the SSB information of the specified emergency PCI information is sent at the specified time domain position (configured) and frequency domain position (same as the frequency domain of the current serving cell) according to the emergency call SSB configuration information. After the normal flying object finds the emergency PCI, it will report it to the search and rescue system.

[0080] Exemplarily, the lost flying object search and rescue system further includes:

[0081] The emergency PCI definition module is used to set the corresponding PCI for each flying object according to the type of flying object and the corresponding actual use.

[0082] Exemplarily, the lost flying object search and rescue system also includes: an emergency call SSB generation module, which is used to confirm the number of SSB beams in the target coverage scenario according to the system design of the search and rescue system in the NR cell, and obtain all the remaining unused SSBs of the NR cell; use one SSB position or multiple SSB positions among the remaining SSBs as the time domain sending position in the emergency call SSB configuration information; use the frequency domain of the SSB beam in the target coverage scenario as the frequency domain sending position in the emergency call SSB configuration information; and use the period of the SSB beam in the target coverage scenario as the period information in the emergency call SSB configuration information.

[0083] Compared with the prior art, the embodiment of the present invention provides a lost flying object search and rescue method and system for flying objects. After the flying object accesses the NR cell, the NR cell or the search and rescue system will configure the emergency call SSB configuration information for the flying object and determine the emergency PCI information sent when the flying object loses synchronization and makes an emergency call. After the flying object loses connection, the emergency PCI information will be periodically sent out at the time domain position and frequency domain position specified by the emergency call SSB configuration information. Since the channel occupied by the emergency PCI information is the idle SSB channel of the NR cell, other flying objects working normally will always obtain the SSB signal of the NR cell on the SSB broadcast channel after accessing the NR cell. Therefore, when receiving the information on all SSB broadcast channels, the emergency PCI information sent by the lost flying object will be received together, and the lost flying object will be found for subsequent rescue. The whole process utilizes the idle SSB channel resources of the original NR cell, minimizes the impact on normal flying objects, and realizes the detection of abnormal flying objects, and does not need to rely on other external equipment or change the communication network architecture of the NR cell.

[0084] In summary, the present invention utilizes a normally functioning flying object to "sense" a faulty flying object, and then the normally functioning flying object transmits relevant information back to the system, thereby realizing the discovery of the faulty flying object.

[0085] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for searching and rescuing a lost flying object, characterized in that: include: Obtain emergency call SSB configuration information and emergency PCI information of the accessed NR cell; The emergency call SSB configuration information is set according to the remaining SSBs of the NR cell; If synchronization with the network of the NR cell is lost, sending the emergency PCI information at a specified location according to the emergency call SSB configuration information; When the emergency PCI information is received by other normal flying objects, other normal flying objects are notified to report the search and rescue information corresponding to the emergency PCI information to the search and rescue system.

2. The lost flying object search and rescue method applied to a flying object as claimed in claim 1, characterized in that: Before acquiring the emergency call SSB configuration information and emergency PCI information of the accessed NR cell, the method further includes: According to the system design of the search and rescue system in the NR cell, the number of SSB beams in the target coverage scenario is confirmed, and all unused remaining SSBs of the NR cell are obtained; Using one SSB position or multiple SSB positions in the remaining SSB as the time domain transmission position in the emergency call SSB configuration information; The frequency domain of the SSB beam in the target coverage scenario is used as the frequency domain transmission position in the emergency call SSB configuration information; The period of the SSB beam in the target coverage scenario is used as the period information in the emergency call SSB configuration information.

3. The lost flying object search and rescue method applied to a flying object as claimed in claim 1, characterized in that: Get emergency PCI information, including: Acquire emergency PCI information generated by the search and rescue system based on device information from the search and rescue system.

4. The lost flying object search and rescue method applied to a flying object as claimed in claim 1, characterized in that: The losing synchronization with the network of the NR cell specifically includes: The synchronization signal of the NR cell cannot be periodically detected in the downlink; or, The TA timing command cannot be received periodically from the base station side in the uplink.

5. The lost flying object search and rescue method applied to a flying object as claimed in claim 1, characterized in that: The sending the emergency PCI information at a designated location according to the emergency call SSB configuration information specifically includes: Confirm the frequency domain transmission position, time domain transmission position and period information in the emergency call SSB configuration information; The emergency PCI information is periodically sent at a position jointly designated by the frequency domain sending position and the time domain sending position according to the period information.

6. The lost flying object search and rescue method applied to a flying object as claimed in claim 1, characterized in that: When the emergency PCI information is received by other normal flying objects, notifying other normal flying objects to report the search and rescue information corresponding to the emergency PCI information to the search and rescue system specifically includes: After the emergency PCI information is received by other normal flying objects, the other normal flying objects integrate the coordinate information and abnormal status of the flying object that sent the emergency PCI information into search and rescue information; Other normal flying objects report the search and rescue information to the search and rescue system.

7. The lost flying object search and rescue method applied to a flying object as claimed in claim 6, characterized in that: Before the other normal flying objects report the search and rescue information to the search and rescue system, the method further includes: Other normal flying objects add the SSB signal strength and azimuth information corresponding to the emergency PCI information to the search and rescue information.

8. A missing flying object search and rescue system, characterized in that: include: A configuration module is used to configure the emergency call SSB configuration information and the corresponding emergency PCI information to each flying object; and is also used to configure all unused remaining SSB information of the NR cell and the emergency PCI information corresponding to each flying object to the base station system; A receiving module is used to receive search and rescue information uploaded by a normal flying object; the search and rescue information generation process is: a flying object loses synchronization with the network of the NR cell, and the flying object sends corresponding emergency PCI information at a designated location according to the corresponding emergency call SSB configuration information; When the emergency PCI information is received by other normal flying objects, the other normal flying objects report the search and rescue information corresponding to the emergency PCI information to the search and rescue system.

9. The lost flying object search and rescue system as claimed in claim 8, characterized in that: Also includes: The emergency PCI definition module is used to set the corresponding PCI for each flying object according to the type of flying object and the corresponding actual use.

10. The lost flying object search and rescue system as claimed in claim 8, characterized in that: Also includes: The emergency call SSB generation module is used to confirm the number of SSB beams in the target coverage scenario according to the system design of the search and rescue system in the NR cell, and obtain all the remaining unused SSBs of the NR cell; use one SSB position or multiple SSB positions in the remaining SSB as the time domain transmission position in the emergency call SSB configuration information; The frequency domain of the SSB beam in the target coverage scenario is used as the frequency domain transmission position in the emergency call SSB configuration information; The period of the SSB beam in the target coverage scenario is used as the period information in the emergency call SSB configuration information.

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