CN-122027990-A - Efficient establishment method and system for controlled interception area based on location information perception

CN122027990ACN 122027990 ACN122027990 ACN 122027990ACN-122027990-A

Abstract

The invention discloses a method and a system for efficiently establishing a controlled interception area based on location information perception, which abandons indiscriminate forwarding logic of traditional flooding, and taking the node position information as a core judgment basis for forwarding the control message, and realizing the directional propagation of the control message by constructing a perception boundary. The source node broadcasts an RTS frame containing a position and an included angle threshold, the receiving node calculates the included angle between itself and the connection line of the transmitting node and the connection line of the transmitting-destination node, and the RTS frame is forwarded only when the included angle is smaller than the threshold, so that the directional propagation of the control message along the source-destination direction is realized. And after receiving the RTS, the destination node broadcasts a CTS frame, and the node judges a relay or a blocking node according to the hop count information to complete the region establishment. The invention limits the broadcasting range through the position included angle judgment, reduces redundant information, suppresses broadcast storm, reduces overhead and improves the establishment efficiency.

Inventors

LIU YIMING
LI PENGYU
ZHANG ZHI

Assignees

北京邮电大学

Dates

Publication Date: 20260512
Application Date: 20260312

Claims (10)

1. The efficient establishment method of the controlled interception area based on the location information perception is characterized by comprising the following steps of: the method comprises the steps that a source node responds to a controlled interception area establishment request of an application layer, and generates and broadcasts a first control message, wherein the first control message encapsulates position information of a sending node, position information of a destination node and a preset position included angle threshold value; After receiving the first control message, the receiving node takes the connecting line between the sending node and the target node in the message as a reference line, and calculates the included angle between the connecting line between the receiving node and the sending node and the reference line; If the included angle is smaller than the position included angle threshold, the receiving node judges that the receiving node is in an effective forwarding range, has forwarding authority, updates the position information of the receiving node to a first control message and then continues broadcasting; if the included angle is larger than or equal to the position included angle threshold value, the receiving node judges that the receiving node does not have forwarding authority, and only carries out local analysis on the first control message without forwarding; and transmitting the control message in the limited area along the direction from the source node to the destination node by the hop-by-hop directional forwarding until the destination node successfully receives the first control message.
2. The method for efficiently establishing a controlled interception area based on location information awareness of claim 1 further comprising parsing the hop count information between the destination node and the source node after the destination node successfully receives the first control message, waiting for a predetermined time, and broadcasting a second control message, wherein the second control message encapsulates shortest hop count information from the destination node to the source node.
3. The method for efficiently establishing a controlled interception area based on location information awareness according to claim 2, further comprising judging the type of the own node according to the number of hops between the own node and a source node, the number of hops between the own node and a destination node and the shortest number of hops after the second control message is received by the node in the network, wherein if the node meets a preset judgment condition, the node is judged to be a relay node and has forwarding permission, and if the node does not meet the preset judgment condition, the node is judged to be a blocking node and the second control message is forbidden to be forwarded.
4. The method for efficiently establishing a controlled interception area based on location information awareness according to claim 3 wherein said predetermined decision condition is that a sum of a number of hops from a node to a source node and a number of hops from a node to a destination node is equal to a shortest number of hops.
5. The method for efficiently establishing a controlled interception area based on location information awareness according to claim 1 wherein said first control message is an RTS frame comprising fields of a frame type, a source node identification, a destination node identification, forwarding node location information, destination node location information, a location angle threshold, a hop count from the source node, and a packet sequence number.
6. The method for efficiently establishing a controlled interception area based on location information awareness according to claim 2 wherein said second control message is a CTS frame comprising fields of frame type, source node identification, destination node identification, hop count from destination node, shortest hop count between source and destination nodes, packet sequence number.
7. The efficient location information awareness based controlled intercept area establishment method of claim 1 wherein the location angle threshold is a configurable parameter dynamically adjusted according to network topology density, node distribution, or traffic demand for trade-off between control overhead and transmission reliability.
8. The efficient establishment method of the controlled interception area based on the location information awareness according to claim 1 is characterized in that a transparent transmission control layer is additionally arranged on a MAC layer through a cross-layer design, the transparent transmission control layer is responsible for controlling message scheduling, location information processing and node role judgment, and a physical layer supports multi-node concurrent transmission by adopting an autonomous cooperative communication technology.
9. A controlled interception area efficient creation system based on location information awareness, comprising: the source node is used for initiating a controlled interception area establishment request and broadcasting an RTS frame encapsulated with a sending node position, a destination node position and a position included angle threshold; The relay nodes are positioned in the limited propagation area between the source node and the destination node, and the relay nodes meet the condition that the included angle between the connecting line of the receiving node and the transmitting node and the connecting line between the transmitting node and the destination node is smaller than the position included angle threshold value and are used for updating and forwarding the RTS frame; The destination node is used for receiving the RTS frame and broadcasting a CTS frame, and the CTS frame encapsulates the shortest hop count information between the source node and the destination node; And the blocking nodes are positioned outside the limited propagation area, the blocking nodes meet the condition that the included angle between the connecting line of the receiving node and the transmitting node and the connecting line of the transmitting node and the destination node is larger than or equal to the position included angle threshold value, and only control information is received without forwarding.
10. The system for efficient establishment of controlled interception area based on location information awareness according to claim 9 wherein the basis for determining the relay node and the blocking node further comprises that after the node receives the CTS frame, the node determines the node as the relay node according to the hop count of the node and the source node, the hop count of the node and the destination node and the shortest hop count information in the CTS frame, if the sum of the hop count of the node and the source node and the hop count of the node and the destination node is equal to the shortest hop count, and otherwise, the node determines the node as the blocking node.

Description

Efficient establishment method and system for controlled interception area based on location information perception Technical Field The invention relates to the technical field of wireless self-organizing networks, in particular to a method and a system for efficiently establishing a controlled interception area based on location information awareness. Background The relay blocking network (Barrage Relay Network, BRN) serves as an important branch of the collaborative mobile self-organizing network, and the core realizes high-reliability and low-delay communication by constructing controlled interception areas (Controlled Barrage Region, CBR) and adopting a collaborative flooding transmission mode, so that the relay blocking network has irreplaceable application value in high-dynamic scenes without fixed infrastructures such as tactical communication, emergency rescue, unmanned aerial vehicle clusters and the like. The establishment of the controlled interception area is a core premise of realizing reliable communication of the relay network, and the essence of the establishment is that the judgment of node roles (relay nodes/blocking nodes) is completed through the interaction of RTS/CTS control messages, the limiting range of data transmission is defined, and the resource waste caused by global flooding is avoided. The specific flow is as follows: (1) The source node floods RTS (request to send) information to the whole network, the information is transmitted to the destination node after being forwarded hop by hop, and the hop number field in the information is increased after each hop; (2) After receiving RTS message, destination node analyzes shortest hop count between source and destination node, and then floods CTS message to whole network; (3) After all nodes in the network receive CTS messages, according to the hop counts from the nodes to the source node and the destination node, and in combination with a preset area width threshold, the nodes are autonomously judged to be relay nodes (participating in data forwarding) or blocking nodes (not participating in forwarding), and finally a controlled interception area is formed. However, as the application scene of the relay network evolves to a large scale and high dynamic state, the drawbacks of the traditional controlled interception area establishment mode (RTS/CTS interaction scheme based on whole network flooding) are increasingly remarkable, and the following technical defects exist: (1) The building cost is extremely high, and the resource waste is serious The traditional scheme adopts the whole-network indifferent flooding to transmit RTS/CTS control messages, the transmission quantity of the control messages is positively correlated with the number of network nodes, and the transmission scale of the control messages is approximately exponentially increased under the scene of dense nodes and complex topology. The large amount of redundant control messages occupy wireless channel bandwidth, consume node calculation power and energy consumption, so that the utilization rate of network resources is extremely low, and the core requirement of low overhead of a relay network cannot be met. (2) High risk of broadcast storm and low communication efficiency The indiscriminate flooding forwarding lacks the targeted propagation range constraint, and the control messages are easy to cause 'broadcast storm' when being diffused to the whole network, on one hand, the excessive concurrent control messages can aggravate signal conflict among nodes, so that the control messages are failed to decode and are frequently retransmitted, on the other hand, the redundant message congestion can prolong the establishment time of a controlled interception area, reduce the overall communication efficiency of the network, and can seriously influence the real-time transmission in a high dynamic scene. (3) Poor expandability, and difficult adaptation to large-scale networking With the increase of the number of network nodes (such as unmanned aerial vehicle clusters, tactical communication and other large-scale scenes), the problems of overhead and conflict of the traditional scheme can be continuously amplified, namely, the more nodes are, the more the total amount of control messages is flooded, the more channel congestion and signal conflict are serious, and finally, the establishment success rate of a controlled interception area is reduced, the time delay is increased, so that the method cannot adapt to large-scale and high-dynamic engineering application scenes. (4) Lack of directional propagation mechanism and insufficient forwarding pertinence The existing scheme only depends on hop count information to judge node roles, spatial characteristics such as node geographic positions and the like are not combined, control messages are not spread in an invalid way in a direction away from a destination node, unnecessary overhead and collision risks are further increased, and