Method, device and system of contention access channel

Abstract

The invention provides a method of a contention access channel. A network node confirms a priority group partition coefficient of the network node according to a media access control (MAC) address of the network node or the number of network nodes in the upper level monitored by the network node, confirming a priority group of the network node through the priority group partition coefficient, and starting the contention access channel at an access moment corresponding to the priority group of the network node or when an access moment corresponding to a previous priority group of the priority group of the network node comes. Namely, due to the adoption of the above-mentioned priority group partition method, network nodes are divided into different priority groups, a node of each priority group enters the contention access channel when the access moment is confirmed to come, the number of the network nodes which start the contention access channel at the same moment is reduced, and the probability of conflicts in the process of networking is further reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for competing for an access channel. Background technique [0002] With the development of smart grid, in order to solve the problem of low efficiency of manual meter reading, centralized meter reading system is widely used to collect meter data information. The centralized meter reading system refers to the system in which the main station reads the recorded value information of the electric energy of multiple electric energy meters through the transmission media (wireless, wired, power line carrier, etc.). The centralized meter reading system is mainly composed of three parts: the main Station, concentrator, and collection terminal (or carrier meter) Among them, the concentrator is the central layer of the entire system, which transmits the power data collected from the collection terminal (or carrier meter) to the master station accor...

AI Technical Summary

Problems solved by technology

Take the networking process of the third-level nodes 8 and 9 as an example: the concentrator first broadcasts the beacon, and then informs the second-level node by letting the first-level nodes 2 and 3 broadcast the beacon, and the newly joined second-level node 4 , 5, 6, and 7 broadcast beacons in turn. After these nodes broadcast the beacons, arrange a competition access time period (hereinafter referred to as CP), and the third-level nodes 8 and 9 that need to join send their own cluster heads in the CP. Send a join request, and complete the process of joining the cluster head during this time period. If nodes 8 and 9 both send join requests at the beginning of the CP, a conflict will result. Similarly, the second-level nodes 4, 5, 6, and 7 are in This problem also exists in the process of joining the cluster head. In fact, the same problem may exist when each level of nodes joins the cluster head

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