CN107743047B - Wireless directional relay communication method and system - Google Patents
Wireless directional relay communication method and system Download PDFInfo
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Abstract
The invention relates to a wireless directional relay communication method and a system, wherein the method comprises the following steps: the relay node receives and analyzes a data packet, wherein the data packet comprises a sending address, a relay address, a target address and data information; judging whether the relay address in the data packet is the address of the nearest relay node positioned in front of the relay node in a predetermined relay path, if so, modifying the relay address in the data packet into the relay address of the current relay node, and forwarding the data packet with the modified relay address to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is performed. The method can realize long-distance transmission in a relay mode, and the relay node only forwards the task data packet and does not process other received data packets, thereby avoiding occupying bandwidth.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a system for wireless directional relay communication.
Background
Ningxia is a province of agriculture, the cultivated land area is 114.5 million hectares, and each person occupies 2.82 mu of cultivated land which is higher than the average level of the whole country, the Ningxia has good conditions for developing agriculture, but the Ningxia is in northwest arid regions, water resources are relatively short, irrigation water mainly comes from yellow river, and the yellow river is the root of the industrial and agricultural development of the engineering and the engineering related engineering of the water conservancy of the Ningxia region.
The accurate regulation and control management of water resources is the premise of realizing reasonable use of the water resources. The yellow water diversion irrigation ditch hopper opening is particularly a water drainage gate opening of a main ditch leading to a branch ditch. According to the current water resource management method in the yellow river diversion irrigation district, the flow of the bucket opening is the legal basis for settling the water fee by the water pipe department and the water consumption unit, so that the accurate measurement of the flow of the bucket opening is very important. Manual measurement and adjustment are inconvenient, and the measurement accuracy has human factors, so the automatic flow measurement technology is mostly adopted at present. However, automatic flow measurement techniques require the transmission of acquired data from the point of acquisition to the conditioning system.
The communication problem of the field bucket mouth flow measurement and regulation system can be solved by adopting a wired or wireless communication mode. The wired communication mode needs to remotely lay communication lines, the laying and maintenance workload is large, the construction difficulty of the field water conservancy channel is higher, and the cost is high. Mature 3G/4G wireless communication technology can completely solve the communication problem, but the use cost of the technology is high. Protocol communication protocols such as Wifi and Zigbee have high maturity and are widely used, but the communication distance is limited, so that the requirements of field wireless communication are difficult to meet.
Disclosure of Invention
The invention aims to overcome the defects of limited communication distance or high cost in the prior art and provides a wireless directional relay communication method and a wireless directional relay communication system.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a wireless directional relay communication method comprises the following steps:
the remote control end sends a first request data packet of a data acquisition request to the relay node, wherein the first request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as a remote control end address, the sending address is the remote control end address, and the target address is the target relay node address of the expected collected data;
the relay node receives and analyzes the first request data packet, determines the current transmission direction according to the sending address and the target address in the first request data packet and a predetermined relay path, judges whether the relay address in the first request data packet is the address of the nearest relay node positioned in front of the relay node in the current transmission direction or not, modifies the relay address in the request data packet into the address of the relay node if the relay address in the first request data packet is the address of the nearest relay node in the current transmission direction, and forwards the first request data packet after the relay address modification to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is performed.
After receiving the first request data packet, the target relay node determines that the target relay node is the target relay node according to a target address in the first request data packet, and integrates the acquired data information into a response data packet to be transmitted, wherein the response data packet comprises a transmitting address, a relay address, a target address and the data information; setting a relay address as a current relay node address, wherein the sending address is the current relay node address, and the target address is a remote control terminal address;
the relay node receives and analyzes the response data packet, determines the current transmission direction according to the sending address and the target address in the response data packet and a predetermined relay path, judges whether the relay address in the response data packet is the address of the nearest relay node positioned in front of the relay node in the current transmission direction, modifies the relay address in the response data packet into the address of the relay node if the relay address in the response data packet is the address of the relay node, and forwards the response data packet after the relay address modification to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is performed.
In the method, on one hand, long-distance transmission can be realized in a relay mode, and the problem of limited transmission distance in WiFi and other modes is solved; on the other hand, the relay node only forwards the task (the task is that the relay node is used as a member of the relay path and has a task of transmitting the data packet) data packet related to the relay node, and does not process other data packets, so that the bandwidth occupied by forwarding other data packets is avoided, and the communication cost is further reduced.
The embodiment of the invention also provides a wireless directional relay communication system, which comprises a remote control end, a plurality of relay nodes and a plurality of information acquisition devices, wherein one information acquisition device corresponds to one relay node, and data information acquired by the information acquisition device is sent out through the relay node corresponding to the information acquisition device; relay paths among the plurality of relay nodes are predetermined;
the remote control end sends a first request data packet of a data acquisition request to the relay node, wherein the first request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as a remote control end address, the sending address is the remote control end address, and the target address is the target relay node address of the expected collected data;
the relay node receives and analyzes the first request data packet, determines the current transmission direction according to the sending address and the target address in the first request data packet and a predetermined relay path, judges whether the relay address in the first request data packet is the address of the nearest relay node positioned in front of the relay node in the current transmission direction or not, modifies the relay address in the request data packet into the address of the relay node if the relay address in the first request data packet is the address of the nearest relay node in the current transmission direction, and forwards the first request data packet after the relay address modification to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is carried out;
after receiving the first request data packet, the target relay node determines that the target relay node is the target relay node according to a target address in the first request data packet, and integrates the acquired data information into a response data packet to be transmitted, wherein the response data packet comprises a transmitting address, a relay address, a target address and the data information; setting a relay address as a current relay node address, wherein the sending address is the current relay node address, and the target address is a remote control terminal address;
the relay node receives and analyzes the response data packet, determines the current transmission direction according to the sending address and the target address in the response data packet and a predetermined relay path, judges whether the relay address in the response data packet is the address of the nearest relay node positioned in front of the relay node in the current transmission direction, modifies the relay address in the response data packet into the address of the relay node if the relay address in the response data packet is the address of the relay node, and forwards the response data packet after the relay address modification to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is carried out;
and after receiving the response data packet with the target address being the remote control address, the remote control end analyzes the response data packet to obtain the data information in the response data packet.
In a further optimized scheme, the system also comprises an unmanned aerial vehicle control end carried on the unmanned aerial vehicle;
the remote control end sends a second request data packet of a data acquisition request to the unmanned aerial vehicle control end, wherein the second request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as an address of a control end of the unmanned aerial vehicle, the sending address is an address of a remote control end, and the target address is an address of a target relay node which is expected to acquire data;
the unmanned aerial vehicle control end carried on the unmanned aerial vehicle receives and analyzes the second request data packet, identifies a target address in the second request data packet, flies to the space above a relay node corresponding to the target address, and sends the second request data packet to the target relay node;
the target relay node receives and analyzes the second request data packet, determines that the target relay node is the target relay node according to a target address in the second request data packet, integrates the acquired data information into a response data packet and transmits the response data packet, wherein the response data packet comprises a transmitting address, a relay address, a target address and the data information; judging whether the relay address in the second request data packet is an address of a control end of the unmanned aerial vehicle, if so, setting the relay address as the address of the control end of the unmanned aerial vehicle, wherein the sending address is the current relay node address, and the target address is the address of a remote control end;
the unmanned aerial vehicle control end receives and analyzes the response data packet, and sends the response data packet to the remote control end;
and after receiving the response data packet, the remote control terminal analyzes the response data packet to obtain the data information in the response data packet.
Compared with the prior art, the method and the system can realize long-distance transmission in a relay mode, and solve the problem of limited transmission distance in WiFi and other modes; the relay node only forwards the task data packet related to the relay node, and does not process other data packets, so that the bandwidth occupied by forwarding other data packets is avoided, the unnecessary expense cost consumed for forwarding other data packets is avoided, the communication cost of field information transmission is reduced, the communication problem of a field bucket mouth flow measurement and regulation system is solved, and the market and economic benefits are good.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a system architecture diagram of a wireless directional relay communication system according to an embodiment of the present invention.
Fig. 2 is a system architecture diagram of another wireless directional relay communication system according to an embodiment of the present invention.
Fig. 3 is a flow chart illustrating a process of a relay node in the wireless directional relay communication system shown in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a first wireless directional relay communication system provided in this embodiment includes a remote control end, a plurality of relay nodes, and a plurality of information acquisition devices, where one information acquisition device corresponds to one relay node, and data information acquired by the information acquisition device is sent out through the relay node corresponding to the information acquisition device; the relay path between the plurality of relay nodes is predetermined.
After data information (such as field bucket mouth flow data) is acquired by the information acquisition equipment, the data information is transmitted to the corresponding relay node, and the data information is sent out through the relay node.
When the remote control end needs data information acquired by the information acquisition equipment, the remote control end sends a first request data packet of a data acquisition request to the relay node, wherein the first request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as a remote control end address, the sending address is the remote control end address, and the target address is the address of a target relay node which expects to acquire data, namely any relay node can be used as the target relay node.
As shown in fig. 1 (an arrow in fig. 1 indicates a transmission direction) and fig. 3, after receiving a first request packet, a relay node first parses the first request packet, and obtains a sending address, a relay address, a destination address, and request command information in the first request packet; then, determining the current transmission direction according to the sending address and the target address in the first request data packet and a predetermined relay path, judging whether the relay address in the first request data packet is the address of the nearest relay node located in front of the relay node in the current transmission direction or not, if so, determining the current transmission direction according to the relay address in the first request data packet, modifying the relay address in the first request data packet into the address of the current relay node, and then forwarding the first request data packet with the modified relay address to the next relay node in the current transmission direction according to the predetermined relay path; if the relay address in the first request packet is not the address of the nearest relay node located before the relay node in the predetermined relay path, no processing is performed.
After receiving the first request data packet, the target relay node analyzes the first request data packet, determines that the target relay node is the target relay node according to a target address in the first request data packet, and integrates the acquired data information into a response data packet to be transmitted, wherein the response data packet comprises a transmitting address, a relay address, a target address and the data information; the relay address is set as the current relay node address (namely the address of the relay address), the sending address is the current relay node address, and the target address is the address of the remote control terminal.
Other relay nodes (except the target relay node) receive and analyze the response data packet to acquire a sending address, a relay address, a target address and data information in the response data packet; then, determining the current transmission direction according to the sending address and the target address in the response data packet and a predetermined relay path, judging whether the relay address in the response data packet is the address of the nearest relay node positioned in front of the relay node under the current transmission direction, if so, modifying the relay address in the response data packet into the address of the relay node, and then forwarding the response data packet after the relay address modification to the next relay node under the current transmission direction according to the predetermined relay path; otherwise, no processing is performed.
And after receiving the response data packet with the target address as the remote control address, the remote control terminal analyzes the response data packet to obtain the data information in the response data packet, and completes the data information acquisition task.
It should be noted that any relay node may serve as a target relay node, and when it serves as the target relay node, the collected data information needs to be integrated into a response packet, and when it does not serve as the target relay node, it only needs to forward the response packet to the next relay node according to the current transmission direction. In specific implementation, after receiving a data packet, a relay node analyzes the data packet, and determines whether the relay node is a target relay node according to a target address, if not, the relay node determines a current transmission direction first, and then determines whether the data packet needs to be forwarded, if so, the relay node forwards the data packet to a next relay node, if not, the relay node does not perform processing, and if the relay node determines that the relay node is the target relay node, the relay node integrates acquired data information into a response data packet and sends the response data packet.
That is, the relay node only forwards the data packet related to itself, and the data packet unrelated to itself is not forwarded, so that the bandwidth occupied by forwarding the data packet unrelated to itself, that is, the additional payment cost for the bandwidth can be avoided, and the communication cost is reduced.
For example, suppose that there are 20 relay nodes in the system, the address of the remote control end is 0, the addresses of the 20 relay nodes are 1, 2, 3, … …, and 20, respectively, and are set according to the positions of the relay nodes in the determined relay path, for example, a relay node with address 4 is located between relay nodes with addresses 3 and 5 in the relay path.
Assuming that the relay node with the address of 8 is a target relay node, the target relay node integrates data information acquired by the information acquisition equipment corresponding to the target relay node into a response data packet to be transmitted, wherein the response data packet comprises a transmission address, a relay address, a target address and the data information, the relay address is set to be 8, the transmission address is 8, and the target address is 0.
If the relay node with the current address of 4 receives a data packet (the first request data packet, the response data packet, and the second request data packet, for the relay node, all are data packets, and the prefix is added to each data packet only for distinguishing), the data packet is analyzed to know that the sending address in the data packet is 8, the relay address is 5, and the destination address is 0, then it can be determined that the current transmission direction is to transmit to the remote control end. Then, the relay node with the current address of 4 modifies the relay address in the response packet to its own address (address of 4), and then forwards the modified first request packet (i.e. the relay address in the first request packet has changed to 4) to the relay node with the address of 3. If the relay node with the current address of 4 receives a data packet without a relay address (i.e. a data packet in another communication mode), or the relay address is 6, or the relay address is 3, the relay node with the current address of 4 does not perform any processing on the data packet.
It is easy to understand that, in the relay path, the first relay node is located between the remote control end and the second relay node, so the first relay node forwards the data packet sent by the remote control end, that is, when the first relay node analyzes that the relay address and the sending address in the data packet are both the addresses of the remote control end, the relay address in the data packet is changed to its own address, and then the data packet is forwarded to the next relay node in the relay path. Similarly, when the destination address received by the target relay node is the own address, the target relay node integrates the data information into a response data packet, and then sends the response data packet to the next relay node in the current transmission direction.
By such a directional transmission, the following benefits exist:
1) the effective transmission of the data information can be ensured through a relay mode.
2) Data packets in other communication modes are not forwarded, bandwidth occupation is avoided, and communication cost is reduced.
3) The data packets of 2 or more relay nodes before the relay node are not forwarded, so that the repeated forwarding of the relay node can be avoided, and the cost is reduced. Taking the above example as an example, if the relay node with address 4 forwards the packet sent by the relay node with address 6 to the relay node with address 3, the relay node with address 5 also forwards the packet to the relay node with address 3 once, so as to cause repeated forwarding.
4) The data packet of the relay node positioned behind the relay node in the current transmission direction is not forwarded, so that the relay node behind the relay node can be prevented from repeating multiple times of forwarding, and the cost is reduced. Taking the above example as an example, if the relay node with address 4 forwards the data packet sent by the relay node with address 3 to 3, the relay node with address 4 has already forwarded the data packet (the data packet of 3 is obtained from 4) to the relay node with address 3 once, and now needs to forward the data packet once, so that repeated forwarding is caused.
5) The problem that the remote control end cannot obtain the data packet or the same data packet is obtained repeatedly for multiple times due to the fact that the data packet is transmitted disorderly is avoided.
In a communication system link, it is inevitable that a data request command sent by a remote control end cannot be responded, for example, a relay node device fails, or communication interruption is caused by reduction of wireless transmission power, and if the situation occurs, acquired data information cannot be sent to the remote control end. Therefore, as shown in fig. 3, the second wireless directional relay communication system according to the embodiment of the present invention further includes an unmanned aerial vehicle control end (mounted on the unmanned aerial vehicle, and performing data transmission by using the advantage that the unmanned aerial vehicle can move in space), and the unmanned aerial vehicle control end is used to directly send a data packet to the remote control end or the target relay node. For example, when the remote control end does not receive a data packet with a target address as the address of the remote control end within a set time range, the remote control end sends a second request data packet of a data acquisition request to the unmanned aerial vehicle control end, wherein the second request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as an address of a control end of the unmanned aerial vehicle, the sending address is an address of a remote control end, and the target address is an address of a target relay node which expects to collect data.
And the unmanned aerial vehicle control end carried on the unmanned aerial vehicle receives and analyzes the second request data packet, identifies a target address in the second request data packet, flies to the space above the relay node corresponding to the target address, and sends the second request data packet to the target relay node.
After receiving the second request data packet, the target relay node judges that the target relay node is the target address according to the target address in the second request data packet, and then integrates the acquired data information into a response data packet to be transmitted, wherein the response data packet comprises a transmitting address, a relay address, the target address and the data information; the relay address is set as the address of the unmanned aerial vehicle control end, the sending address is the current relay node address, and the target address is the address of the remote control end.
And the unmanned aerial vehicle control end receives and analyzes the response data packet, and sends the response data packet to the remote control end.
And after receiving the response data packet, the remote control terminal analyzes the response data packet to obtain data information in the response data packet, and completes a data acquisition task.
When the system does not include the unmanned aerial vehicle control end, the addresses of the relay nodes on the relay path can be set in a mode of setting in sequence from A +1 according to the address of the remote control end as A. When the system comprises the unmanned aerial vehicle control end, the addresses of all relay nodes on the relay path can be set in a mode of starting to be sequentially set from A +2 according to the condition that the address of the remote control end is A and the address of the unmanned aerial vehicle control end is A + 1.
It should be noted that, in the system including the drone control end, data transmission is performed in the drone control end only after the relay link is interrupted, so that when the relay link is intact, the relay node with the address of a +2 forwards the data packet addressed to the remote control end. The method can be realized by judging the sending address and the relay address, if the sending address is consistent with the relay address and is the address of the remote control end, the data packet is forwarded to A +3, and if not, the data packet is not processed. On the one hand, normal operation of the system cannot be influenced, on the other hand, when data transmission is carried out in a mode of sending through the unmanned aerial vehicle control end, if a data packet sent by the remote control end is also received by the adjacent relay node, forwarding is not carried out, and even if the data packet is forwarded, the data packet cannot be transmitted to the target relay node (because the relay link is relayed), so that repeated forwarding of the data packet can be avoided, and the occupied bandwidth is avoided.
It should be noted that all the target relay nodes receive the data packets, and the destination relay nodes need to analyze the transmission address and the relay address in the data packets to determine whether the data packets are the first request data packets or the second request data packets. That is to say, in a system including an unmanned aerial vehicle control end, when the system is implemented specifically, after a relay node actually judges that the relay node is a target relay node through a target address, collected data information is integrated into a response data packet and the response data packet is sent, wherein the response data packet comprises a sending address, a relay address, a target address and the data information; then judging whether the relay address in the data packet is the address of the unmanned aerial vehicle control end, if so, setting the relay address in the response data packet as the address of the unmanned aerial vehicle control end, namely, transmitting data in the mode of the unmanned aerial vehicle control end; otherwise, the relay address is set as the current relay node address, that is, the data transmission is carried out through the relay link at the moment. Therefore, normal operation of the system can be guaranteed, and invalid (relay link interruption) data forwarding of part of relay nodes can be avoided when data transmission is carried out in an unmanned aerial vehicle control end mode, so that bandwidth is invalid and occupied.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (9)
1. A method of wireless directional relay communication, comprising the steps of:
the remote control end sends a first request data packet of a data acquisition request to the relay node, wherein the first request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as a remote control end address, the sending address is the remote control end address, and the target address is the target relay node address of the expected collected data;
the relay node receives and analyzes the first request data packet, determines the current transmission direction according to the sending address and the target address in the first request data packet and a predetermined relay path, judges whether the relay address in the first request data packet is the address of the nearest relay node positioned in front of the relay node in the current transmission direction or not, modifies the relay address in the request data packet into the address of the relay node if the relay address in the first request data packet is the address of the nearest relay node in the current transmission direction, and forwards the first request data packet after the relay address modification to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is performed.
2. The method of claim 1,
after receiving the first request data packet, the target relay node determines that the target relay node is the target relay node according to a target address in the first request data packet, and integrates the acquired data information into a response data packet to be transmitted, wherein the response data packet comprises a transmitting address, a relay address, a target address and the data information; setting a relay address as a current relay node address, wherein the sending address is the current relay node address, and the target address is a remote control terminal address;
the relay node receives and analyzes the response data packet, determines the current transmission direction according to the sending address and the target address in the response data packet and a predetermined relay path, judges whether the relay address in the response data packet is the address of the nearest relay node positioned in front of the relay node in the current transmission direction, modifies the relay address in the response data packet into the address of the relay node if the relay address in the response data packet is the address of the relay node, and forwards the response data packet after the relay address modification to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is performed.
3. The method of claim 2, further comprising the step of:
the remote control end sends a second request data packet of a data acquisition request to the unmanned aerial vehicle control end, wherein the second request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as an address of a control end of the unmanned aerial vehicle, the sending address is an address of a remote control end, and the target address is an address of a target relay node which is expected to acquire data;
the unmanned aerial vehicle control end carried on the unmanned aerial vehicle receives and analyzes the second request data packet, identifies a target address in the second request data packet, flies to the space above a relay node corresponding to the target address, and sends the second request data packet to the target relay node;
the target relay node receives and analyzes the second request data packet, determines that the target relay node is the target relay node according to a target address in the second request data packet, integrates the acquired data information into a response data packet and transmits the response data packet, wherein the response data packet comprises a transmitting address, a relay address, a target address and the data information; judging whether the relay address in the second request data packet is an address of a control end of the unmanned aerial vehicle, if so, setting the relay address as the address of the control end of the unmanned aerial vehicle, wherein the sending address is the current relay node address, and the target address is the address of a remote control end;
and the unmanned aerial vehicle control end receives and analyzes the response data packet, and sends the response data packet to the remote control end.
4. The method according to claim 3, wherein the relay node that receives the request packet sent by the remote control end determines whether the sending address and the relay address in the request packet are both addresses of the remote control end, if yes, the request packet is determined to be a first request packet, determines the current transmission direction according to the sending address and the target address in the first request packet, modifies the relay address in the first request packet to the address of the relay node, and forwards the first request packet after the modification of the relay address to the next relay node in the current transmission direction according to a predetermined relay path; otherwise, no processing is performed.
5. The method of claim 1, wherein the remote control address is a; the relay addresses of the relay nodes are set in order from a +1 according to the positions on the relay path.
6. The method of claim 3, wherein the address of the remote control end is fixed to A, the address of the unmanned aerial vehicle control end is fixed to A +1, and the addresses of the relay nodes are sequentially arranged from A +2 according to the positions on the relay path.
7. A wireless directional relay communication system is characterized by comprising a remote control end, a plurality of relay nodes and a plurality of information acquisition devices, wherein one information acquisition device corresponds to one relay node, and data information acquired by the information acquisition devices is sent out through the relay node corresponding to the information acquisition device; relay paths among the plurality of relay nodes are predetermined;
the remote control end sends a first request data packet of a data acquisition request to the relay node, wherein the first request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as a remote control end address, the sending address is the remote control end address, and the target address is the target relay node address of the expected collected data;
the relay node receives and analyzes the first request data packet, determines the current transmission direction according to the sending address and the target address in the first request data packet and a predetermined relay path, judges whether the relay address in the first request data packet is the address of the nearest relay node positioned in front of the relay node in the current transmission direction or not, modifies the relay address in the request data packet into the address of the relay node if the relay address in the first request data packet is the address of the nearest relay node in the current transmission direction, and forwards the first request data packet after the relay address modification to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is carried out;
after receiving the first request data packet, the target relay node determines that the target relay node is the target relay node according to a target address in the first request data packet, and integrates the acquired data information into a response data packet to be transmitted, wherein the response data packet comprises a transmitting address, a relay address, a target address and the data information; setting a relay address as a current relay node address, wherein the sending address is the current relay node address, and the target address is a remote control terminal address;
the relay node receives and analyzes the response data packet, determines the current transmission direction according to the sending address and the target address in the response data packet and a predetermined relay path, judges whether the relay address in the response data packet is the address of the nearest relay node positioned in front of the relay node in the current transmission direction, modifies the relay address in the response data packet into the address of the relay node if the relay address in the response data packet is the address of the relay node, and forwards the response data packet after the relay address modification to the next relay node in the current transmission direction according to the predetermined relay path; otherwise, no processing is carried out;
and after receiving the response data packet with the target address being the remote control address, the remote control end analyzes the response data packet to obtain the data information in the response data packet.
8. The wireless directional relay communication system according to claim 7, further comprising an unmanned aerial vehicle control terminal mounted on the unmanned aerial vehicle;
the remote control end sends a second request data packet of a data acquisition request to the unmanned aerial vehicle control end, wherein the second request data packet comprises a sending address, a relay address, a target address and request command information; the relay address is set as an address of a control end of the unmanned aerial vehicle, the sending address is an address of a remote control end, and the target address is an address of a target relay node which is expected to acquire data;
the unmanned aerial vehicle control end carried on the unmanned aerial vehicle receives and analyzes the second request data packet, identifies a target address in the second request data packet, flies to the space above a relay node corresponding to the target address, and sends the second request data packet to the target relay node;
the target relay node receives and analyzes the second request data packet, determines that the target relay node is the target relay node according to a target address in the second request data packet, integrates the acquired data information into a response data packet and transmits the response data packet, wherein the response data packet comprises a transmitting address, a relay address, a target address and the data information; judging whether the relay address in the second request data packet is an address of a control end of the unmanned aerial vehicle, if so, setting the relay address as the address of the control end of the unmanned aerial vehicle, wherein the sending address is the current relay node address, and the target address is the address of a remote control end;
the unmanned aerial vehicle control end receives and analyzes the response data packet, and sends the response data packet to the remote control end;
and after receiving the response data packet, the remote control terminal analyzes the response data packet to obtain the data information in the response data packet.
9. The system according to claim 8, wherein the relay node that receives the request packet sent by the remote control end determines whether the sending address and the relay address in the request packet are both addresses of the remote control end, if yes, the request packet is determined to be a first request packet, determines a current transmission direction according to the sending address and the destination address in the first request packet, modifies the relay address in the first request packet to the address of the relay node, and forwards the first request packet after the modification of the relay address to a next relay node in the current transmission direction according to a predetermined relay path; otherwise, no processing is performed.
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| CN110035470B (en) * | 2019-03-25 | 2020-12-01 | 深圳市联智物联网科技有限公司 | Node equipment for realizing directional data access in multi-node wireless transmission system |
| CN109922466B (en) * | 2019-03-25 | 2020-12-01 | 深圳市联智物联网科技有限公司 | Method for realizing directional data access in multi-node wireless transmission system |
| CN110087279B (en) * | 2019-05-06 | 2022-11-08 | 西安非凡士智能科技有限公司 | Wireless relay networking data transmission method taking group as unit |
| CN110913441B (en) * | 2019-11-28 | 2022-02-11 | 深圳市共进电子股份有限公司 | Data transmission method and device |
| CN114079873B (en) * | 2020-08-14 | 2023-03-24 | 展讯半导体(南京)有限公司 | Multicast communication method and device without clear target user, storage medium, terminal and base station |
| CN114449457B (en) * | 2021-12-29 | 2024-05-17 | 深圳市信致通信技术有限公司 | Data transmission method, node equipment and system based on chain network |
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