Single-hop broadcast control beam pointing method

Abstract

The invention discloses a single-hop broadcast control beam pointing method, and aims to provide a method with high broadcasting efficiency and low broadcasting delay. The method is realized through the following technical scheme that in a directional network, a broadcast node acquires geographic position information of the broadcast node and each neighbor node through a GPS, adopts a single beamto send data in rapid broadcast, notifies all neighbor nodes to set beam directions and try to receive the data, and all the other nodes schedule beam resources to point to the broadcast node to receive the data; then, the broadcast node calculates a beam pointing set required by broadcast sending by using all geographic position information, calculates included angles between every two links, creates a logic diagram G, finds out a maximum complete sub-diagram in the logic diagram G to calculate beam pointing, and determines the beam pointing Pi by using the maximum complete sub-diagram; and in a single beamforming sending process, broadcast messages are sent one by one according to the beamforming direction set until all beamforming directions in the beamforming direction set are processed.

Description

technical field [0001] The invention relates to a fast single-hop broadcast control beam pointing method suitable for directional networks. Background technique [0002] The antenna has different radiation or receiving capabilities for different directions in space, which is the directivity of the antenna. According to different directions, communication antennas used in wireless networks are generally divided into two categories: omnidirectional antennas and directional antennas. Omnidirectional antennas refer to non-directionality, which is shown as uniform radiation in the whole range on the pattern. A directional antenna refers to a directional antenna that radiates within a certain angle range on the pattern. Compared with omnidirectional antennas, directional antennas have many advantages such as high gain, long transmission distance, high speed, and good anti-interference performance, and are more and more widely used in wireless communication networks. [0003] A ...

AI Technical Summary

Problems solved by technology

This method is very fast to achieve single-hop broadcasting, but this forwarding mechanism requires a lot of antenna or beam resources, and the cost of software and hardware is very high, and in the process of parallel transmission, often multiple beams need to equally share the power resources of the broadcast node , the power allocated to a single beam is greatly reduced, and there is usually mutual interference between the beams, the receiving signal-to-noise ratio of neighboring nodes is significantly reduced, which greatly reduces the reliability of single-hop broadcasting

Due to very limited antenna or beam resources, this method is only suitable for small networks with few nodes. For dense directional networks, when the number of neighbor nodes is large, for N neighbor nodes, N directional beam resources are required. None of the beam resources can bear

In addition, due to hardware limitations, the beam resources of nodes are limited, the network scalability in this way is poor, and it does not have the ability to adapt to network topology

[0009] To sum up, the existing technical solutions either rely on the stacking of software and hardware resources, or rely on extending the time for single-hop broadcasting of directional networks, which have their own limitations and cannot meet the needs of fast and reliable broadcasting in large-scale dense directional networks.

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