Method and device for controlling medium access

Abstract

The invention discloses a method and a device for controlling medium access. The method comprises the following steps: randomly selecting an SLOT_ID; detecting the collision of the SLOT_ID; and if the SLOT_ID has no collision in a three-jump range, dispatching and accessing data to be dispatched in a slot corresponding to the SLOT_ID. By the embodiment of the invention, each node establishes a respective three-jump neighbor node list, and each three-jump neighbor node list contains a transmission slot distributed by the relative neighbor node in the three-jump range. After the three-jump neighbor node list is established, the transmission slot of any node in a network has no collision in the three-jump range. When a plurality of nodes are simultaneously communicated with the relative one-jump neighbor node, the probably generated collision is prevented, and the energy consumption of the nodes is reduced.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a medium access control method and device. Background technique [0002] Nodes in wireless sensor networks are generally powered by batteries, and it is difficult to replenish energy under normal circumstances. Therefore, nodes with low energy consumption are important factors to ensure long-term stable operation of wireless sensor networks. [0003] The main reason for the energy waste of wireless sensor networks is that there are many contention conflicts and idle listening. According to the access mode of the wireless sensor network to the wireless channel, the MAC (Medium Access Control, Medium Access Control) protocol of the wireless sensor network is mainly divided into a random access mode and a time division multiplexing mode. In the random access mode, the MAC protocol coordinates the allocation of wireless channels in a random access mode. When multiple nodes ...

AI Technical Summary

Problems solved by technology

In the random access mode, the MAC protocol coordinates the allocation of wireless channels in a random access mode. When multiple nodes communicate in a local area at the same time, they share the channel in a competitive manner, and conflicts are likely to occur, which requires retransmission of data. This wastes energy, and the node is still in the receiving state of the channel when it does not need to send data, and excessive listening also wastes energy

Similarly, when multiple nodes communicate in a local area at the same time, the current time-division multiplexing MAC protocol cannot solve the problem that nodes in wireless sensor networks are prone to conflicts and consume a lot of energy.

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: In the prior art, when multiple nodes of the wireless sensor network communicate with their respective one-hop neighbor nodes at the same time within a local area, conflicts are likely to occur , high energy consumption

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