A design method of csma/ca protocol applied to m2m network

Abstract

The invention discloses a design method of a CSMA / CA (carrier sense multiple access / collision avoidance) protocol for a M2M network, and the method is characterized in that energy consumption of a node with high energy consumption is reduced in the M2M network, and the transmission reliability of data in the M2M network can be ensured when the life cycle of the mentioned node is prolonged, thus the method can be applied to the CSMA / CA protocol of the M2M network. The method comprises steps of: step 1: assigning permission to the monitoring point in the M2M network; step 2: periodically detecting the operation status of the monitoring node in the M2M network, performing step 3 under the idle state of the monitoring node, and performing step 4 under the to-be-transmitted data state of the monitoring node; step 3: performing dormancy operation to the monitoring node, and performing the step 2 after some interval of time; step 4: performing signal channel contention operation to the M2M network, acquiring signal channel use right by the monitoring node, and performing step 5; step 5: uploading the data to the monitoring node, and performing the step 2 after uploading the data.

Description

technical field [0001] The invention relates to a design method of a CSMA / CA protocol applied to an M2M network, and belongs to the technical field of Internet of Things energy-saving communication. Background technique [0002] At present, in the M2M network environment using the IEEE 802.11 protocol, in the M2M network scenario based on the "AP node + terminal node" model, the terminal nodes have the characteristics of large number, random distribution, and strong randomness in collecting environmental information, and the terminal nodes It is mostly used to upload the collected data to the AP node, which belongs to the one-way transmission mode, so the phenomenon of channel contention in this type of M2M network is relatively serious. Although terminal nodes in M2M networks usually have low energy consumption, limited energy is still a bottleneck for the development of M2M networks with a large number of terminal nodes. In the M2M network using the IEEE 802.11 protocol, ...

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Problems solved by technology

[0006] The above deep sleep method has good applicability in a network with a small number of nodes, but in a network with a large number of nodes, when most nodes are lower than the preset energy value, more high-authority nodes will Increase the probability of channel contention in the network. In this case, the solution will increase network energy consumption and fail to achieve the expected energy saving effect

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