Microwave network channel accessing method based on narrowband wave beam directional antenna and system thereof

Abstract

The invention discloses a microwave network channel accessing method based on a narrowband wave beam directional antenna. The method comprises the following steps of accessing a superframe structure multi-hop Ad Hoc network by a network main station, using the multi-hop Ad Hoc network operation time as a reference, and transmitting a synchronizing signal; capturing the synchronizing signal by other network nodes; if capturing succeeds, acquiring unidirectional synchronization; transmitting a broadcast signal according to an MAC address by means of a broadcast signaling time slot, performing searching on other network node broadcast signaling time slots, and establishing a neighboring link relation; performing distance measuring and performing path transmission time delay correction; performing neighbor discovering and antenna adjustment, and obtaining an optimal transmitting and receiving antenna; randomly accessing a time slot A by a sub-frequency channel, and accessing a small time slot by the channel of each time slot; and in a period, accessing the small time slot by M channels, and performing average distribution according to the MAC address. The microwave network channel accessing method is based on the microwave network and the distributed narrowband wave beam direction antenna and has advantages of realizing reliable and stable transmission in a high-mobility scene, quick real-time adjustment of the directional antenna, and effectively improving comprehensive communication performance of the network.

Description

technical field [0001] The invention relates to the field of microwave network research, in particular to a microwave network channel access method and system based on a narrowband beam directional antenna. Background technique [0002] Maritime fleets will constantly change the network topology structure with different training and combat requirements, so the channel access protocol design of the corresponding distributed wireless network has always been the focus of research, and the technical research of the traditional omnidirectional antenna-based signal broadcast transmission model Already very mature. The directional network that uses directional antennas for signal transmission and reception will undergo tremendous changes in the signal transmission model. The existing channel access schemes based on the wireless signal broadcast model will no longer be applicable to the directional network. It is necessary to study new models that match the new channel model. Effic...

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Problems solved by technology

[0004] At present, many directional network communication technologies need to rely on the node position information provided by the satellite positioning system or other measures, but it is undoubtedly very dangerous and deadly in the context of military applications; It is difficult to achieve 360° unobstructed coverage around a warship with a single antenna, which will inevitably lead to the inability of network radio stations to communicate reliably with surrounding nodes, and it is also difficult to find a commanding height in the middle of complex superstructures to achieve 360° unobstructed installation of antennas

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