Multi-beam ad hoc network channel access control method

Abstract

The invention discloses a multi-beam ad hoc network channel access control method, aiming at providing an access control method which has a high channel utilization rate and can improve the network performance. The method of the invention is implemented through the following technical scheme: for a distributed multi-beam scene, combining the characteristics of multi-beams, utilizing the broadcastchannel characteristics of an omni-directional network and the high bandwidth and high directivity characteristics of a directional network, using the short message protocol interaction between nodes,and assisting to complete the high-rate parallel transmission of multiple nodes on a directional link; using space division multiplexing among the nodes to achieve the concurrent communication between multiple transmission nodes and multiple receiving nodes; when a network cluster head node receives RTS frames of all other nodes, running a multi-beam ad hoc network channel access allocation algorithm; and searching an optimal transceiving node pair set in each time slot, finding an edge set with the maximum network capacity as a channel access allocation result of each node in the next directional link time slot, and further implementing the simultaneous multi-transmission and multi-reception of the multiple nodes at the same frequency.

Description

technical field [0001] The invention relates to a channel access control mechanism suitable for multi-beam wireless ad hoc communication networks in a wireless local area network. Background technique [0002] Multi-beam communication equipment adopts space division multiplexing technology combined with TDMA system and self-organizing network working mode, which can significantly improve users compared with traditional ground-air communication equipment. A typical beamforming network is mainly composed of a variable power splitter, a multi-beam antenna sub-beam and the relationship between the total beam and a phase shifter, which can excite the required amplitude and phase to the feed array. Since the multi-beam antenna with a feed source is characterized by the ability to generate multiple sub-beams, the total beam and sub-beams away from the focus of the lens will cause coma aberration and increase the side lobe level. The defocus angle of the feed source cannot exceed th...

AI Technical Summary

Problems solved by technology

The node deployment density in the wireless sensor network WSN is high, so there are multiple nodes accessing the channel at the same time, resulting in packet conflicts, the receiver cannot identify the received data, resulting in waste of channel resources and a decrease in network throughput

If the transmission power of nodes is too high, the communication interference between nodes will be enhanced, and the communication bit error rate will increase, which will affect the overall communication efficiency and throughput of the network, increase the energy consumption of nodes and shorten the life cycle of the network; reduce the transmission power of nodes, which will reduce the interference, but have It may cause the network to be disconnected and affect the overall transmission capacity of the network

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