CN117915462A

CN117915462A - Data transmission method, device, equipment and storage medium

Info

Publication number: CN117915462A
Application number: CN202311696289.0A
Authority: CN
Inventors: 张柳; 李敏; 邱耀明; 彭刚; 张永红; 贾凡; 尤方圆; 展昕; 柳金龙; 田爽; 王孜; 韩轶凡; 周德军; 尹晓双; 汪鹏志
Original assignee: Wuhan Ship Communication Research Institute 722 Research Institute Of China Shipbuilding Corp
Current assignee: Wuhan Ship Communication Research Institute 722 Research Institute Of China Shipbuilding Corp
Priority date: 2023-12-10
Filing date: 2023-12-10
Publication date: 2024-04-19

Abstract

The disclosure provides a data transmission method, a device, equipment and a storage medium, and belongs to the technical field of communication. The method comprises the following steps: a first node sends a first time slot allocation request to a control station in a target sub-time slot in a first downlink time frame, wherein the first downlink time frame comprises n downlink time slots, n is an integer larger than 1, each downlink time slot comprises a first sub-time slot and a second sub-time slot, the first sub-time slots in the n downlink time slots are in one-to-one correspondence with n unmanned nodes, the first node is one of the n unmanned nodes, the target sub-time slot is the first sub-time slot corresponding to the first node, and the first time slot allocation request is used for indicating the data volume of service data to be sent of the first node; receiving first time slot allocation information, wherein the first time slot allocation information is used for indicating m second sub-time slots in a second downlink time frame, and m is a positive integer less than or equal to n; and transmitting service data in m second sub-time slots. The utilization rate of the data transmission resources can be improved.

Description

Data transmission method, device, equipment and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, device, and storage medium.

Background

With the development of wireless technology, unmanned nodes play an important role in more and more fields. The unmanned node typically uses time division multiple access (Time division multiple Access, TDMA) technology to communicate data with the control station.

In the related art, the process of the unmanned node adopting the TDMA technology to perform data transmission with the control station is as follows: after the unmanned node establishes connection with the control station, the control station allocates a downlink time slot with a fixed size for the unmanned node; and the unmanned node transmits service data to the control station in the allocated downlink time slot in each transmission period. That is, in each transmission period, the downlink time slot corresponding to the unmanned node entering the network is fixed.

When the traffic data volumes of different unmanned nodes are greatly different, the downlink time slot distribution mode cannot adapt to the transmission requirements of each unmanned node. For example, the downlink time slot corresponding to the unmanned node that has no data to transmit currently is in an idle state, and the downlink time slots allocated to other unmanned nodes that need to transmit more service data are difficult to transmit all service data. It can be seen that the utilization of the downlink time slot is low.

Disclosure of Invention

The embodiment of the disclosure provides a data transmission method, which can improve the utilization rate of downlink time slots during data transmission.

In a first aspect, an embodiment of the present disclosure provides a data transmission method, including:

A first node sends a first time slot allocation request to a control station in a target sub-time slot in a first downlink time frame, wherein the first downlink time frame comprises n downlink time slots, n is an integer larger than 1, each downlink time slot comprises a first sub-time slot and a second sub-time slot, the first sub-time slot is used for sending the time slot allocation request to the control station, the second sub-time slot is used for sending service data to the control station, the first sub-time slots in the n downlink time slots are in one-to-one correspondence with n unmanned nodes, the first node is one of the n unmanned nodes, the target sub-time slot is a first sub-time slot corresponding to the first node, and the first time slot allocation request is used for indicating the data volume of the service data to be sent by the first node; receiving first time slot allocation information, wherein the first time slot allocation information is used for indicating m second sub-time slots in a second downlink time frame, m is a positive integer less than or equal to n, the first time slot allocation information is sent by the control station according to the received first time slot allocation request, and the structure of the second downlink time frame is the same as that of the first downlink time frame; and in the m second sub-time slots, sending service data to the control station.

Optionally, the receiving the first timeslot allocation information includes: the first time slot allocation information is received in a target uplink time slot in a first uplink time frame, the first uplink time frame comprises n uplink time slots, the n uplink time slots and the n downlink time slots are in one-to-one correspondence and are aligned in time, the n uplink time slots and the n unmanned nodes are in one-to-one correspondence, and the target uplink time slot is an uplink time slot corresponding to the first node in the n uplink time slots.

Optionally, the length of the first sub-slot is smaller than the length of the second sub-slot.

In a second aspect, an embodiment of the present disclosure provides a data transmission method, including:

A control station receives a first time slot allocation request sent by a first node in a target sub-time slot in a first downlink time frame, wherein the first downlink time frame comprises n downlink time slots, n is an integer larger than 1, each downlink time slot comprises a first sub-time slot and a second sub-time slot, the first sub-time slots in the n downlink time slots are in one-to-one correspondence with n unmanned nodes, the first node is one of the n unmanned nodes, the first sub-time slot is used for sending a time slot allocation request to the control station, the second sub-time slot is used for sending service data to the control station, the target sub-time slot is a first sub-time slot corresponding to the first node, and the first time slot allocation request is used for indicating the data quantity of the service data to be sent by the first node; according to the first time slot allocation request, first time slot allocation information is sent to the first node, wherein the first time slot allocation information is used for indicating m second sub-time slots in a second downlink time frame, m is a positive integer less than or equal to n, and the structure of the second downlink time frame is the same as that of the first downlink time frame; and receiving service data sent by the first node in the m second sub-slots.

Optionally, the method further comprises: determining the m second sub-time slots according to the ratio of the data volume of the service data to be transmitted of the first node indicated by the first time slot allocation request to the sum of the data volumes indicated by the time slot allocation requests received in the first downlink time frame, wherein m is in direct proportion to the ratio; and generating the first time slot allocation information according to the m second sub-time slots.

Optionally, the sending the first slot allocation information to the first node includes: the method comprises the steps that target uplink time slots in a first uplink time frame are used for sending first time slot allocation information to a first node, the first uplink time frame comprises n uplink time slots, the n uplink time slots are in one-to-one correspondence with the n downlink time slots and are aligned in time, the n uplink time slots are in one-to-one correspondence with the n unmanned nodes, and the target uplink time slots are uplink time slots corresponding to the first node in the n uplink time slots.

In a third aspect, an embodiment of the present disclosure provides an apparatus for data transmission, the apparatus comprising: a first transmitting module and a first receiving module,

The sending module is configured to send a first timeslot allocation request to a control station in a target sub-timeslot in a first downlink timeslot, where the first downlink timeslot includes n downlink timeslots, n is an integer greater than 1, each downlink timeslot includes a first sub-timeslot and a second sub-timeslot, the first sub-timeslot is used to send the timeslot allocation request to the control station, the second sub-timeslot is used to send service data to the control station, the first sub-timeslot in the n downlink timeslots is in one-to-one correspondence with n unmanned nodes, the target sub-timeslot is a first sub-timeslot corresponding to a first node, the first node is one of the n unmanned nodes, and the first timeslot allocation request is used to indicate a data amount of service data to be sent by the first node; the first receiving module is configured to receive first timeslot allocation information, where the first timeslot allocation information is used to indicate m second sub-timeslots in a second downlink frame, where m is a positive integer less than or equal to n, and the first timeslot allocation information is sent by the control station according to the received first timeslot allocation request, and a structure of the second downlink frame is the same as that of the first downlink frame; the first sending module is further configured to send service data to the control station in the m second sub-slots.

In a fourth aspect, an embodiment of the present disclosure provides an apparatus for data transmission, the apparatus including: a second receiving module and a second transmitting module,

The second receiving module is configured to receive a first timeslot allocation request sent by a first node in a target sub-timeslot in a first downlink timeslot, where the first downlink timeslot includes n downlink timeslots, n is an integer greater than 1, each downlink timeslot includes a first sub-timeslot and a second sub-timeslot, the first sub-timeslot in the n downlink timeslots corresponds to n unmanned nodes one by one, the first node is one of the n unmanned nodes, the first sub-timeslot is used to send a timeslot allocation request to the control station, the second sub-timeslot is used to send service data to the control station, the target sub-timeslot is a first sub-timeslot corresponding to the first node, and the first timeslot allocation request is used to indicate a data amount of service data to be sent by the first node; the second sending module is configured to send, to the first node, first timeslot allocation information according to the first timeslot allocation request, where the first timeslot allocation information is used to indicate m second sub-timeslots in a second downlink frame, where m is a positive integer less than or equal to n, and a structure of the second downlink frame is the same as that of the first downlink frame; the second receiving module is further configured to receive service data sent by the first node in m second sub-slots.

In a fifth aspect, embodiments of the present disclosure provide a computer device, including a processor and a memory, where the memory stores at least one program code, where the at least one program code is loaded and executed by the processor to implement any one of the data transmission methods provided in the first aspect or the second aspect.

In a sixth aspect, embodiments of the present disclosure provide a computer readable storage medium having stored therein a computer program that is executed by a processor to implement any one of the data transmission methods provided in the first or second aspects above.

In a seventh aspect, embodiments of the present disclosure also provide a computer program product comprising a computer program/instruction which, when executed by a processor, implements any of the data transmission methods provided in the first or second aspects.

In an eighth aspect, an embodiment of the present disclosure provides a communication system, including a control station and at least one unmanned node, where the control station is communicatively connected to the at least one unmanned node, and the at least one unmanned node includes a first node, where the first node is configured to perform any one of the data transmission methods provided in the first aspect, and where the control station is configured to perform any one of the data transmission methods provided in the second aspect.

The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least:

In the embodiment of the disclosure, the first downlink time frame includes n downlink time slots, each downlink time slot includes a first sub-time slot and a second sub-time slot, and the first sub-time slot is used for sending a time slot allocation request to a control station, and the second sub-time slot is used for sending service data to the control station.

The first sub-time slots in the n downlink time slots are in one-to-one correspondence with the n unmanned nodes, namely, each unmanned node in each time frame has a corresponding first sub-time slot, so that when service data needs to be sent by each unmanned node including the first node, a time slot allocation request can be timely sent to the control station through the corresponding first sub-time slot.

And, since the first timeslot allocation request is used for indicating the data amount that needs to be transmitted by the first node, after receiving the first timeslot allocation request, the control station can dynamically allocate the number of second sub-timeslots used for the first node to transmit service data according to the data amount indicated by the first timeslot allocation request, so long as m is an integer less than or equal to n. Therefore, when part of unmanned nodes do not need to transmit service data, the first sub-time slot corresponding to the part of unmanned nodes is allocated to the first unmanned nodes for use in the second sub-time slot of the same downlink time slot, so that the utilization rate of the downlink time slot is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic view of a scenario provided in an embodiment of the present disclosure;

fig. 2 is a flowchart of a data transmission method according to an embodiment of the present disclosure;

fig. 3 is a flowchart of a data transmission method according to an embodiment of the present disclosure;

fig. 4 is an interaction schematic diagram of a data transmission method according to an embodiment of the disclosure;

Fig. 5 is a diagram of a downlink epoch configuration provided in an embodiment of the present disclosure;

fig. 6 is a time frame structure diagram provided in an embodiment of the present disclosure;

Fig. 7 is a schematic diagram of an allocation result of a second sub-slot according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a data transmission device according to an embodiment of the disclosure;

fig. 9 is a schematic diagram of a data transmission device according to an embodiment of the disclosure;

Fig. 10 is a schematic structural diagram of a computer device according to an embodiment of the disclosure.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

Fig. 1 is a schematic view of a scenario provided in an embodiment of the present disclosure. As shown in fig. 1, a plurality of unmanned nodes are wirelessly connected with a control station, and the plurality of unmanned nodes share one data link, so that data transmission between the unmanned nodes and the control station is realized.

Optionally, the unmanned node is also called an unmanned platform or unmanned device, including an unmanned aerial vehicle or unmanned boat, and the like, and the control station includes a ground control station or an offshore control station, and the like, which is not limited by the embodiments of the disclosure.

Different-frequency full duplex communication system is adopted between the unmanned node and the control station, namely, a data link between the unmanned node and the control station comprises an uplink and a downlink, the uplink and the downlink are of different frequencies, and uplink transmission and downlink transmission can be carried out simultaneously. At the same time, only one unmanned node is in a transmitting state, and other unmanned nodes are in a receiving state. In the embodiment of the disclosure, the uplink is a link for transmitting data to the unmanned node by the control station, and the downlink is a link for transmitting data to the control station by the unmanned node.

Fig. 2 is a flowchart of a data transmission method according to an embodiment of the present disclosure. The method is performed by a first node, which is any one of the unmanned nodes in fig. 1. As shown in fig. 2, the method includes the following steps.

In step 201, a target sub-slot in a first downlink time frame sends a first slot allocation request to a control station.

In the disclosed embodiment, a downlink time frame is used for each node to transmit data to a control station. One downlink frame represents a transmission period, and each downlink frame includes n downlink time slots, where n is an integer greater than 1. The first downlink frame may be any downlink frame.

Wherein each downlink time slot includes a first sub-time slot and a second sub-time slot. The first sub-slot is used for sending a time slot allocation request to the control station, and the second sub-slot is used for sending service data to the control station.

The first sub-time slot in the n downlink time slots corresponds to the n unmanned nodes one by one. I.e. in each downlink time frame, each first sub-slot uniquely corresponds to one unmanned node. Each first sub-slot is used for correspondingly sending a slot allocation request to the control station. The first node is one of n unmanned nodes, and the target sub-time slot is one first sub-time slot corresponding to the first node in n downlink time slots. Thus, each fixed allocation has a first sub-slot for ensuring that each is capable of sending a slot allocation request to the control station during a downlink time frame.

The slot allocation request includes node information and data amount indication information. The node information includes at least an identification of the node. The identification of the node may be a number of the node, etc., and the present disclosure is not limited thereto as long as an unmanned node can be uniquely identified. Optionally, the node information may further include status information such as a node position. The data quantity indication information is used for indicating the data quantity size of the data to be transmitted of the corresponding unmanned node. In this way, the control station may determine the number of the second sub-slots allocated to each unmanned node according to the size of the data amount of the data to be transmitted of each unmanned node after receiving the slot allocation request of each unmanned node.

In the embodiment of the disclosure, the second sub-slot is used for the unmanned node to send the service data to the control station, the allocation mode of the second sub-slot is different from that of the first sub-slot, and the second sub-slot is not fixedly used for the service data transmission of one unmanned node, but is dynamically allocated to each unmanned node by the control station according to the received time slot allocation request, so that the waste of the second sub-slot can be avoided, and the utilization rate of the downlink time slot is improved.

In step 202, first slot allocation information is received.

The first time slot allocation information is used for indicating m second sub-time slots in the second downlink time frame. m is a positive integer less than or equal to n. The structure of the second downlink frame is the same as the structure of the first downlink frame and temporally follows the first downlink frame.

In step 203, traffic data is sent to the control station in m second sub-slots.

And, since the first timeslot allocation request is used for indicating the data amount that needs to be transmitted by the first node, the control station, after receiving the first timeslot allocation request, can dynamically allocate the number of second sub-timeslots used for the first node to transmit service data according to the data amount indicated by the first timeslot allocation request. Therefore, when part of unmanned nodes do not need to transmit service data, the first sub-time slot corresponding to the part of unmanned nodes is allocated to the first unmanned nodes for use in the second sub-time slot of the same downlink time slot, so that the utilization rate of the downlink time slot is improved.

Fig. 3 is a flowchart of a data transmission method according to an embodiment of the present disclosure. The method is performed by a control station, for example by the control station. As shown in fig. 3, the method includes the following steps.

In step 301, a first slot allocation request sent by a first node in a target sub-slot in a first downlink time frame is received.

The relevant contents of the first downlink time frame, the target sub-slot and the first slot allocation request are referred to in step 201, and a detailed description thereof is omitted herein.

In step 302, first slot allocation information is transmitted to a first node in accordance with a first slot allocation request.

The first time slot allocation information is used for indicating m second sub-time slots in a second downlink time frame, wherein m is a positive integer less than or equal to n, and the structure of the second downlink time frame is the same as that of the first downlink time frame.

In step 303, service data sent by the first node in m second sub-slots is received.

Fig. 4 is an interaction schematic diagram of a data transmission method according to an embodiment of the disclosure. As shown in fig. 4, the data transmission method includes:

In step 401, the control station sends a first network access request to a first node.

In the embodiment of the disclosure, the control station may be preconfigured with a correspondence between unmanned nodes and time slots. The number of unmanned nodes is equal to the number of time slots. Each unmanned node corresponds to a time slot. The embodiment of the disclosure does not limit the specific implementation form of the corresponding relation, and can take the form of a list or an array, etc. Let n be the number of unmanned nodes and n be an integer greater than 1. When in the form of a list, it may be as shown in Table one.

Table of correspondence between unmanned nodes and time slots

Node identification	Time slot number
		Node 1	Time slot 1
Node 2	Time slot 2
		……	……
Node n	Time slot n

Optionally, the method further comprises:

the control station modifies the correspondence according to the received instruction. Here, the instruction received by the control station includes one or more of an add instruction, a delete instruction, and a modify instruction. The adding instruction is used for indicating the adding node and the corresponding time slot, the deleting instruction is used for indicating the deleting node and the corresponding time slot, and the modifying instruction is used for indicating the time slot corresponding to the modifying node.

In the disclosed embodiment, the control station is a time reference station of the TDMA protocol, and both the uplink and downlink of the unmanned node are synchronized with the control station.

In the embodiment of the disclosure, the time slots are divided into an uplink time slot and a downlink time slot, the uplink time slot is used for the control station to send data to the unmanned node, and the downlink time slot is used for the unmanned node to send data to the control station. The uplink time slot and the downlink time slot are aligned in time and can be represented by the same time slot number.

And the control station transmits a corresponding network access request in an uplink time slot corresponding to each unmanned node. Each network access request includes an identification of the node, a slot number, and a synchronization parameter. The identification of the node in the network access request is the identification of the node corresponding to the uplink time slot where the network access request is located. The time slot number is the time slot number of the time slot for sending the network access request and is used for indicating the time slot allocated to the node. The synchronization parameter is used for the nodes to synchronize in time (i.e., align in time) with the control station.

For example, the first network entry request includes an identification of the first node, a slot number, and a synchronization parameter. The slot number in the first network entry request is used to indicate the slot assigned to the first node.

When the first node enters the communication range of the control station, a plurality of network access requests are received. The first node determines a first network access request carrying an identification of the first node from the received plurality of network access requests.

In step 402, the first node sends a response to the control station according to the first network access request.

The response is used to indicate that the first node agrees to access the network. Optionally, the reply includes node information. The content of the node information is referred to in the aforementioned step 201.

The first node acquires a time slot number from a first network access request, and sends the response in a first sub-time slot of a downlink time slot corresponding to the acquired time slot number.

Through this steps 401 and 402, the first node can be networked. The network access procedure of the other unmanned nodes is the same as that of the first node and will not be described in detail here.

Alternatively, the first node may save the slot number in the first network access request, so that the node information and the first slot allocation request are transmitted at the same slot number in the subsequent downlink frame, and so on.

In the embodiment of the disclosure, n is greater than or equal to the number of unmanned nodes to which the control station is connected. That is, in the foregoing correspondence, some unmanned nodes may complete network access or all unmanned nodes may complete network access.

In step 403, the first node sends a first slot allocation request to the control station in a target sub-slot in a first downlink time frame.

Accordingly, the control station receives the first slot allocation request.

In the embodiment of the disclosure, the control station configures the time frames according to the foregoing correspondence, and a plurality of time frames form a epoch.

Fig. 5 is a downlink epoch block diagram provided by an embodiment of the present disclosure. As shown in fig. 5, in the downlink, each epoch includes x time frames, and the duration of each time frame is T, and the duration of the epoch is xT. Since n unmanned nodes exist in the corresponding relationship, each time frame includes n downlink time slots. That is, each time frame includes n first sub-slots 21 and n second sub-slots 22.

In the embodiment of the present disclosure, since the corresponding uplink and downlink frames are aligned in time, that is, the start time of the uplink frame is the same as the start time of the corresponding downlink frame and the end time of the uplink frame is the same as the end time of the corresponding downlink frame, they may also be collectively referred to as a time frame.

Fig. 6 is a schematic diagram of a time frame structure according to an embodiment of the disclosure. As shown in fig. 6, one time frame represents one transmission period, and the duration of the transmission period is T. When the number of unmanned nodes is n, one time frame comprises n uplink time slots and n downlink time slots, and n is an integer greater than 1. The n uplink time slots and the n downlink time slots are in one-to-one correspondence, and the corresponding uplink time slots and the corresponding downlink time slots are aligned in time. Optionally, the time lengths of n uplink time slots are equal, the time lengths of n downlink time slots are also equal, and the lengths of the uplink time slots and the downlink time slots are both T/n.

The n uplink time slots are in one-to-one correspondence with the n unmanned nodes. The uplink time slot is used for the control station to send data to the corresponding unmanned node.

Each downlink time slot comprises a first sub-slot 21 and a second sub-slot 22. The first sub-time slots 21 are used for the unmanned nodes to send time slot allocation requests to the control stations, and each unmanned node is fixedly allocated with one first sub-time slot 21 for ensuring the communication between each unmanned node and the control station. The second sub-slot 22 is used for the unmanned node to transmit service data to the control station, the allocation mode of the second sub-slot 22 is different from that of the first sub-slot 21, the second sub-slot 22 is not fixed for data transmission of one unmanned node, but the control station generates an allocation result after receiving a slot allocation request sent by the unmanned node, and dynamically allocates the allocation result to each unmanned node.

Referring again to fig. 6, the length st of the first sub-slot 21 is less than the length lt of the second sub-slot 22, and therefore, the first sub-slot may also be referred to as a short slot and the second sub-slot may also be referred to as a long slot. The first sub-slot 21 is used for the unmanned node to send a slot allocation request to the control station, the data size of the slot allocation request is smaller, and the required transmission time is shorter; and the second sub-slot 22 is used for the unmanned node to send service data to the control station, the data volume of the service data is generally larger, and the required transmission time is longer. Thus, in the embodiment of the present disclosure, the length of the first sub-slot is set to be shorter, and in the case that the slot length is fixed, more time can be taken as the second sub-slot 22 to transmit service data. In this way, the resource utilization can be further improved.

In the embodiment of the disclosure, the ratio of the length of the first sub-slot to the length of the second sub-slot is 1/Q, where the value range of Q may be 3-10. When the ratio of the length of the first sub-time slot to the length of the second sub-time slot is in the range, on one hand, the length of the first sub-time slot can be ensured to be enough for transmitting a time slot allocation request or transmitting node information of an unmanned node and the like, and on the other hand, most of downlink time slots can be ensured to be used for transmitting service data, so that the resource utilization rate is improved.

Alternatively, the value of Q may be 3 to 6, for example, Q may be 4 or 5.

As an example, an unmanned node may collect ambient environmental information in real-time. The environmental information includes, but is not limited to, image, sound, temperature, humidity, etc., and may include one or more thereof. When the unmanned node determines that the acquired environmental information meets the set condition, the acquired environmental information is used as service data to be sent to the control station.

Since the data amount of the image is large, an example will be described below with the image as an example. In other embodiments, the generation of the business data, as well as the business data itself, may take other forms and content, and the embodiments of the present disclosure are not limited in this regard.

In some examples, the set conditions include one or more of the following: a target object exists in the acquired image; the difference between the acquired image and a reference image corresponding to the geographic position of the acquired image exceeds a set difference degree; the similarity between successively acquired images is below a similarity threshold. The target object can be a moving object or a static object, and can be set according to actual needs, and the unmanned node can determine whether the target object exists in the acquired image by utilizing technologies such as image recognition and the like. The reference image may be a pre-stored image photographed at the same geographical location as the acquired image, and when the difference between the acquired image and the corresponding reference image exceeds a set difference, the change of the position is indicated to be large, and important attention is required. The similarity between the continuously acquired images is lower than a similarity threshold value, which means that the surrounding environment changes rapidly and important attention is needed. Both the degree of difference and the degree of similarity may be calculated using correlation algorithms in image processing techniques, which is not limited by the present disclosure.

Optionally, in an embodiment of the disclosure, the first node sends a first slot allocation request to the control station in the allocated first sub-slot, and retransmits the first slot allocation request at a timing before receiving the first slot allocation information.

The timing retransmission means that the first node retransmits the first slot allocation request in the first sub-slot 21 allocated to itself in each time frame after transmitting the first slot allocation request until the timeout period is exceeded or the set number of times is reached. If the timeout period is exceeded or the set number of times is reached, the control station does not reply to the time slot allocation request yet, and the first node reports an exception to the control station or other designated terminals.

In the embodiment of the disclosure, the timeout time may be set to 3 seconds to 5 seconds, and if the control station does not reply to the timeslot allocation request sent by the unmanned node within the timeout time, the unmanned node may report an exception, and then the user manually processes the exception. Therefore, effective transmission of data is ensured, and the solution can be found in time after the abnormality is generated.

In step 404, the control station generates first slot allocation information according to the first slot allocation request.

The first time slot allocation information is used for indicating m second sub-time slots in a second downlink time frame, wherein m is a positive integer less than or equal to n.

The second downlink frame is a downlink frame subsequent to the first downlink frame. Alternatively, the second downlink frame may be the xth downlink frame after the first downlink frame. Wherein X is a positive integer. The value of X can be set according to practical needs, alternatively, X is 1-3, for example, X is equal to 1. Thus, timeliness of data transmission can be ensured.

The structure of the second downlink time frame is the same as that of the first downlink time frame, that is, each downlink time slot comprises a plurality of downlink time slots, and each downlink time slot comprises a first sub-time slot and a second sub-time slot.

Illustratively, the first slot allocation information includes node information and indication information of m second sub-slots.

In some examples, the indication information of the m second sub-slots includes a value of m and a starting slot number. In this way, the first node may determine the second sub-slot of the downlink slots corresponding to the m slot numbers from the start slot number as m second sub-slots.

In other examples, the indication information for the m second sub-slots includes a start slot number and an end slot number. In this way, the first node may determine the starting time slot number, the ending time slot number, and the second sub-slots in the downlink time slots corresponding to m-2 time slot numbers between the starting time slot number and the ending time slot number as m second sub-slots.

In still other examples, the indication information of the m second sub-slots includes a slot number of a downlink slot in which the m second sub-slots are located. In this way, the first node may directly determine the second sub-slots in the downlink slots corresponding to the m slot numbers as m second sub-slots.

Fig. 7 is a schematic diagram of an allocation result of a second sub-slot in a data transmission method according to an embodiment of the present disclosure. As shown in fig. 7, assuming that the number of unmanned nodes that can be accessed is n in advance configured in the control station, n first sub-slots 21 exist in one time frame and are respectively allocated to one unmanned node, so as to ensure that each unmanned node can send important information such as a slot allocation request to the control station in each time frame. And n second sub-slots 22 are used for being dynamically allocated to each unmanned node so as to transmit service data with different task sizes of different unmanned nodes, wherein node 1 occupies m1 second sub-slots 22, node 2 occupies m2 second sub-slots 22 … … and node n occupies mn second sub-slots 22.

Wherein m1 to mn satisfy the following formula:

As can be seen from this formula, in one time frame, some unmanned nodes may not be assigned second sub-slots 22, and even all second sub-slots 22 may be assigned to one unmanned node, but each second sub-slot 22 may be assigned to only one unmanned node.

In the embodiment of the present disclosure, as shown in fig. 7, the allocation positions of the plurality of second sub-slots 22 of each unmanned node are adjacent, that is, correspond to a plurality of consecutive downlink slots, which is beneficial for the overall transmission of the same service data. In other embodiments, the allocation locations of the second sub-slots 22 of each unmanned node may also be non-contiguous, which is not a limitation of the embodiments of the present disclosure.

Optionally, this step 404 includes the following two steps: the method comprises the steps of determining m second sub-time slots according to the ratio of the data volume of service data to be transmitted of a first node indicated by a first time slot allocation request to the sum of the data volumes indicated by the time slot allocation requests received by a control station in a first downlink time frame, wherein m is in direct proportion to the ratio; and a second step of generating first time slot allocation information according to the m second sub-time slots.

In this way, on-demand allocation of the second sub-slot in the second downlink time frame can be achieved.

In the first step, the control station determines the data volume of service data to be transmitted of each unmanned node according to the time slot allocation request of each unmanned node received in the first downlink time frame; and then calculating the ratio of the sum of the data quantity corresponding to the first node and the data quantity corresponding to each unmanned node, and finally determining m second sub-time slots according to the ratio.

Optionally, the method further comprises: the control station receives time slot configuration information, wherein the time slot configuration information is used for indicating the unmanned node and a second sub-time slot allocated to the unmanned node; and the control station allocates a second sub-time slot to each unmanned node according to the received user instruction.

When the method is implemented, the staff can input the time slot configuration information through the configuration interface. The timeslot configuration information may be a correspondence between unmanned nodes and timeslot allocation information, such as an input node identification, and indication information of a corresponding second sub-timeslot.

In some embodiments, when the plurality of unmanned nodes all need to send service data, special situations such as more important service data of some unmanned nodes may exist, and in this case, the user may manually allocate the second sub-slot 22 to adapt to more emergency situations, so as to improve flexibility and practicality of data transmission.

Optionally, a switching option may be further included in the configuration interface, where the switching option is used to select a timeslot allocation mode, and the timeslot allocation mode includes automatic allocation and manual configuration by the control station. Providing an input field for inputting slot configuration information when the switch option indicates that the manual configuration is selected; when the switching option indicates that the automatic allocation of the control station is selected, the control station automatically allocates according to the mode, and an input field for inputting the time slot configuration information is in a non-inputtable state. In this way, it is possible to freely switch in two slot allocation modes and reduce the possibility of erroneous operation.

In step 405, the control station transmits first slot allocation information to the first node.

Accordingly, the first node receives the first slot allocation information.

After receiving the first time slot allocation information, the first node analyzes the first time slot allocation information to determine an allocated second sub-time slot.

In step 406, the first node transmits traffic data to the control station over the allocated second sub-slot.

Correspondingly, the control station receives the service data sent by the first node.

When the amount of traffic data that can be transmitted by the m second sub-slots 22 allocated to the first node by the control station in one time frame is smaller than the amount of traffic data to be transmitted by the unmanned node, the first node fails to finish the traffic data to be transmitted by the allocation transmission. Thus, the first node will repeatedly execute steps 403 to 406 until all the service data are sent.

The service data sent by the first node is sent in the form of data packets. Under the condition of large traffic data volume, the traffic data needs to be transmitted in a subpacket mode, and the data packet contains node information, the position of the group of data in the original data, whether the group of data is the last group and the like, so that the control station can carry out grouping according to the information in the packet after receiving and analyzing the data packets so as to combine the complete original traffic data.

Optionally, the method further comprises: the control station receives state information sent by a second node in the corresponding first sub-time slot, wherein the second node is an unmanned node without service data transmission requirement. Here, the state information includes, but is not limited to, the aforementioned node information. The second node may enable the control station to determine that the second node is still staying within the communication range of the control station by sending status information to the control station. If the control station does not receive the state information sent by the second node in the set number of time frames, the control station determines that the second node is off-line, and then sends a network access request in the uplink time slot corresponding to the second node. The second node and the first node may be the same unmanned node at different times, or may be different unmanned nodes.

In the communication system where the unmanned nodes are located, the number of the unmanned nodes is limited, and the control station sends less data to the unmanned nodes, usually some control information, so that the uplink resources are abundant, and the uplink resources can be equally distributed to all the unmanned nodes.

For the downlink resource, since there may be multiple unmanned nodes simultaneously transmitting service data to the control station, the downlink resource is tensed when the service data volume is large. Therefore, the embodiment of the disclosure can avoid the situation that the service data needs to be sent when the unmanned node exists or not and the idle second sub-time slot exists by carrying out the on-demand allocation of the second sub-time slot, can effectively improve the utilization rate of downlink resources and improve the data transmission efficiency of the unmanned node.

Meanwhile, the first sub-time slots in the n downlink time slots are in one-to-one correspondence with the n unmanned nodes, namely, each unmanned node in each time frame has a corresponding first sub-time slot, so that when service data needs to be sent by each unmanned node including the first node, a time slot allocation request can be timely sent to the control station through the corresponding first sub-time slots.

In addition, in the embodiment of the disclosure, the control station can actively send the network access request in the uplink time slot corresponding to the unmanned node which is not connected with the network, so that the unmanned node can quickly access the control station, the network access process of the unmanned aerial vehicle can be simplified, and the network access efficiency of the unmanned aerial vehicle is improved. And the corresponding relation is preconfigured in the control station, so that the control station only sends a network access request to the unmanned node in the corresponding relation, and only the node in the corresponding relation can access the control station, thereby improving the safety of communication.

Fig. 8 is a schematic structural diagram of a data transmission device according to an embodiment of the disclosure. The data transmission means may be implemented as all or part of a computer device, such as the computer device in the aforementioned unmanned node, by software, hardware or a combination of both. As shown in fig. 8, the apparatus 800 includes: a first transmitting module 801 and a first receiving module 802.

The first sending module 801 is configured to send a first timeslot allocation request to a control station in a target sub-timeslot in a first downlink timeslot, where the first downlink timeslot includes n downlink timeslots, n is an integer greater than 1, each downlink timeslot includes a first sub-timeslot and a second sub-timeslot, the first sub-timeslot is used to send the timeslot allocation request to the control station, the second sub-timeslot is used to send service data to the control station, the first sub-timeslot in the n downlink timeslots is in one-to-one correspondence with n unmanned nodes, the target sub-timeslot is a first sub-timeslot corresponding to a first node, the first node is one of the n unmanned nodes, and the first timeslot allocation request is used to indicate a data amount of service data to be sent by the first node. The first receiving module 802 is configured to receive first timeslot allocation information, where the first timeslot allocation information is used to indicate m second sub-timeslots in a second downlink frame, where m is a positive integer less than or equal to n, and the first timeslot allocation information is sent by the control station according to the received first timeslot allocation request, and a structure of the second downlink frame is the same as that of the first downlink frame. The first sending module 801 is further configured to send service data to the control station in the m second sub-slots.

Optionally, the first receiving module 802 is configured to receive the first timeslot allocation information in a target uplink timeslot in a first uplink timeslot, where the first uplink timeslot includes n uplink timeslots, the n uplink timeslots and the n downlink timeslots are in one-to-one correspondence and are aligned in time, the n uplink timeslots and the n unmanned nodes are in one-to-one correspondence, and the target uplink timeslot is an uplink timeslot corresponding to the first node in the n uplink timeslots.

Fig. 9 is a schematic device diagram of a data transmission method according to an embodiment of the disclosure. The data transmission means may be implemented as all or part of a computer device, such as the aforementioned control station, by software, hardware or a combination of both. As shown in fig. 9, the apparatus 900 includes: a second receiving module 901 and a second transmitting module 902.

The second receiving module 901 is configured to receive a first timeslot allocation request sent by a first node in a target sub-timeslot in a first downlink timeslot, where the first downlink timeslot includes n downlink timeslots, n is an integer greater than 1, each downlink timeslot includes a first sub-timeslot and a second sub-timeslot, the first sub-timeslot in the n downlink timeslots corresponds to n unmanned nodes one by one, the first node is one of the n unmanned nodes, the first sub-timeslot is used for sending a timeslot allocation request to a control station, the second sub-timeslot is used for sending service data to the control station, the target sub-timeslot is a first sub-timeslot corresponding to the first node, and the first timeslot allocation request is used for indicating a data amount of service data to be sent by the first node. The second sending module 902 is configured to send, to the first node, first time slot allocation information according to the first time slot allocation request, where the first time slot allocation information is used to indicate m second sub-time slots in a second downlink time frame, where m is a positive integer less than or equal to n, and a structure of the second downlink time frame is the same as that of the first downlink time frame. The second receiving module 901 is further configured to receive service data sent by the first node in the m second sub-slots.

Optionally, the apparatus further includes a generating module 903, where the generating module 903 is configured to determine, according to a ratio of a data amount of the traffic data to be sent of the first node indicated by the first timeslot allocation request to a sum of data amounts indicated by timeslot allocation requests received in the first downlink time frame, the m second sub-timeslots, where m is proportional to the ratio; and generating the first time slot allocation information according to the m second sub-time slots.

Optionally, the second sending module 902 is configured to send the first timeslot allocation information to a first node in a target uplink timeslot in a first uplink timeslot, where the first uplink timeslot includes n uplink timeslots, the n uplink timeslots and the n downlink timeslots are in one-to-one correspondence and are aligned in time, the n uplink timeslots and the n unmanned nodes are in one-to-one correspondence, and the target uplink timeslot is an uplink timeslot corresponding to the first node in the n uplink timeslots.

It should be noted that: when the data transmission device provided in the above embodiment performs data transmission, only the division of the above functional modules is used as an example, in practical application, the above functional allocation may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the data transmission device and the data transmission method provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the data transmission device and the data transmission method are detailed in the method embodiments and are not repeated herein.

The division of the modules in the embodiments of the present disclosure is schematically shown, and only one logic function is divided, and another division manner may be adopted in actual implementation, and in addition, each functional module in each embodiment of the present disclosure may be integrated in one processor, may exist alone physically, or may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.

The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present disclosure may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a terminal device (which may be a personal computer, a mobile phone, or a communication device, etc.) or a processor (processor) to perform all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The embodiment of the disclosure also provides a communication system, which comprises the control station and at least one unmanned node, wherein the control station is in communication connection with the at least one unmanned node, and the at least one unmanned node comprises the first node.

The disclosed embodiments also provide a computer device including a processor and a memory, where at least one program code is stored in the memory, where the at least one program code is loaded and executed by the processor to implement the data transmission method in the disclosed embodiments.

Fig. 10 is a schematic structural diagram of a computer device provided in an embodiment of the present disclosure. As shown in fig. 10, the computer device 1000 includes: a processor 1001 and a memory 1002.

The processor 1001 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so on. The processor 1001 may be implemented in at least one hardware form of DSP (DIGITAL SIGNAL processing), FPGA (field-programmable gate array), PLA (Programmable Logic Array ). The processor 1001 may also include a main processor, which is a processor for processing data in the awake state, also called a CPU, and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 1001 may integrate a GPU (Graphics Processing Unit, image processor) for rendering and drawing of content required to be displayed by the display screen. In some embodiments, the processor 1001 may also include an AI (ARTIFICIAL INTELLIGENCE ) processor for processing computing operations related to machine learning.

Memory 1002 may include one or more computer-readable storage media, which may be non-transitory. Memory 1002 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 1002 is used to store at least one instruction for execution by processor 1001 to implement the data transmission methods provided in embodiments of the present disclosure.

Those skilled in the art will appreciate that the architecture shown in fig. 10 is not limiting as to the computer device 1000, and may include more or fewer components than shown, or may combine certain components, or employ a different arrangement of components.

The disclosed embodiments also provide a non-transitory computer-readable storage medium, which when executed by a processor of a computer device, enables the computer device to perform the data transmission method provided in the disclosed embodiments.

The disclosed embodiments also provide a computer program product comprising a computer program/instruction which, when executed by a processor, implements the data transmission method provided in the disclosed embodiments.

The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims

1. A method of data transmission, the method comprising:

A first node sends a first time slot allocation request to a control station in a target sub-time slot in a first downlink time frame, wherein the first downlink time frame comprises n downlink time slots, n is an integer larger than 1, each downlink time slot comprises a first sub-time slot and a second sub-time slot, the first sub-time slot is used for sending the time slot allocation request to the control station, the second sub-time slot is used for sending service data to the control station, the first sub-time slots in the n downlink time slots are in one-to-one correspondence with n unmanned nodes, the first node is one of the n unmanned nodes, the target sub-time slot is a first sub-time slot corresponding to the first node, and the first time slot allocation request is used for indicating the data volume of the service data to be sent by the first node;

Receiving first time slot allocation information, wherein the first time slot allocation information is used for indicating m second sub-time slots in a second downlink time frame, m is a positive integer less than or equal to n, the first time slot allocation information is sent by the control station according to the received first time slot allocation request, and the structure of the second downlink time frame is the same as that of the first downlink time frame;

And in the m second sub-time slots, sending service data to the control station.

2. The method of claim 1, wherein the receiving the first slot allocation information comprises:

The first time slot allocation information is received in a target uplink time slot in a first uplink time frame, the first uplink time frame comprises n uplink time slots, the n uplink time slots and the n downlink time slots are in one-to-one correspondence and are aligned in time, the n uplink time slots and the n unmanned nodes are in one-to-one correspondence, and the target uplink time slot is an uplink time slot corresponding to the first node in the n uplink time slots.

3. A method of data transmission, the method comprising:

A control station receives a first time slot allocation request sent by a first node in a target sub-time slot in a first downlink time frame, wherein the first downlink time frame comprises n downlink time slots, n is an integer larger than 1, each downlink time slot comprises a first sub-time slot and a second sub-time slot, the first sub-time slots in the n downlink time slots are in one-to-one correspondence with n unmanned nodes, the first node is one of the n unmanned nodes, the first sub-time slot is used for sending a time slot allocation request to the control station, the second sub-time slot is used for sending service data to the control station, the target sub-time slot is a first sub-time slot corresponding to the first node, and the first time slot allocation request is used for indicating the data quantity of the service data to be sent by the first node;

According to the first time slot allocation request, first time slot allocation information is sent to the first node, wherein the first time slot allocation information is used for indicating m second sub-time slots in a second downlink time frame, m is a positive integer less than or equal to n, and the structure of the second downlink time frame is the same as that of the first downlink time frame;

And receiving service data sent by the first node in the m second sub-slots.

4. A method according to claim 3, characterized in that the method further comprises:

determining the m second sub-time slots according to the ratio of the data volume of the service data to be transmitted of the first node indicated by the first time slot allocation request to the sum of the data volumes indicated by the time slot allocation requests received in the first downlink time frame, wherein m is in direct proportion to the ratio;

And generating the first time slot allocation information according to the m second sub-time slots.

5. The method of claim 4, wherein the sending the first slot allocation information to the first node comprises:

The method comprises the steps that target uplink time slots in a first uplink time frame are used for sending first time slot allocation information to a first node, the first uplink time frame comprises n uplink time slots, the n uplink time slots are in one-to-one correspondence with the n downlink time slots and are aligned in time, the n uplink time slots are in one-to-one correspondence with the n unmanned nodes, and the target uplink time slots are uplink time slots corresponding to the first node in the n uplink time slots.

6. The method according to any of claims 1 to 2 or any of claims 3 to 5, wherein the length of the first sub-slot is smaller than the length of the second sub-slot.

7. An apparatus for data transmission, the apparatus comprising: a first transmitting module and a first receiving module,

The sending module is configured to send a first timeslot allocation request to a control station in a target sub-timeslot in a first downlink timeslot, where the first downlink timeslot includes n downlink timeslots, n is an integer greater than 1, each downlink timeslot includes a first sub-timeslot and a second sub-timeslot, the first sub-timeslot is used to send the timeslot allocation request to the control station, the second sub-timeslot is used to send service data to the control station, the first sub-timeslot in the n downlink timeslots is in one-to-one correspondence with n unmanned nodes, the target sub-timeslot is a first sub-timeslot corresponding to a first node, the first node is one of the n unmanned nodes, and the first timeslot allocation request is used to indicate a data amount of service data to be sent by the first node;

The first receiving module is configured to receive first timeslot allocation information, where the first timeslot allocation information is used to indicate m second sub-timeslots in a second downlink frame, where m is a positive integer less than or equal to n, and the first timeslot allocation information is sent by the control station according to the received first timeslot allocation request, and a structure of the second downlink frame is the same as that of the first downlink frame;

the first sending module is further configured to send service data to the control station in the m second sub-slots.

8. An apparatus for data transmission, the apparatus comprising: a second receiving module and a second transmitting module,

The second receiving module is configured to receive a first timeslot allocation request sent by a first node in a target sub-timeslot in a first downlink timeslot, where the first downlink timeslot includes n downlink timeslots, n is an integer greater than 1, each downlink timeslot includes a first sub-timeslot and a second sub-timeslot, the first sub-timeslot in the n downlink timeslots corresponds to n unmanned nodes one by one, the first node is one of the n unmanned nodes, the first sub-timeslot is used to send a timeslot allocation request to a control station, the second sub-timeslot is used to send service data to the control station, the target sub-timeslot is a first sub-timeslot corresponding to the first node, and the first timeslot allocation request is used to indicate a data amount of service data to be sent by the first node;

The second sending module is configured to send, to the first node, first timeslot allocation information according to the first timeslot allocation request, where the first timeslot allocation information is used to indicate m second sub-timeslots in a second downlink frame, where m is a positive integer less than or equal to n, and a structure of the second downlink frame is the same as that of the first downlink frame;

the second receiving module is further configured to receive service data sent by the first node in m second sub-slots.

9. A computer device comprising a processor and a memory, wherein the memory has stored therein at least one program code that is loaded and executed by the processor to implement the data transmission method according to any of claims 1 to 2 or to implement the data transmission method according to any of claims 3 to 6.

10. A computer-readable storage medium, in which a computer program is stored, the computer program being executed by a processor to implement the data transmission method according to any one of claims 1 to 2 or to implement the data transmission method according to any one of claims 3 to 6.