Random number statement-based multiple access method

Abstract

The invention discloses a method for realizing multiple access with a random number statement, which mainly solves the problems of low channel utilization rate and long channel access delay caused by overmany time slots of an avoiding time period in the conventional priority-based multiple access method. The method is implemented by a process comprising a channel monitoring time period, a priority competition time period, a random number statement time period and a data transmission time period. In the channel monitoring time period, channels are monitored, and a current channel is judged whether to be idle or not. In the priority competition time period, the service priority of each station is stated, and the stations with the highest service priority are screened according to statement results. In the random number statement time period, random numbers are generated by the station with the highest service priority, and are stated, and the station with the greatest stated random number may obtain a data transmission opportunity. The method has the advantages of low channel access overhead, high channel utilization rate and short channel access delay, and can be used for Ethernet over cable (EoC) communication.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a multiple access method, in particular to an Ethernet EoC communication system based on a coaxial cable, in which multiple communication stations use carrier sense multiple access (CSMA) to efficiently access channels The method can be used in the technical field of EoC communication. Background technique [0002] In an EoC communication system that shares a medium, when multiple stations access the channel at the same time, the data frames of multiple users may collide on the physical channel, making it impossible for the receiving end to receive it correctly, resulting in communication failure. In an EoC network, in order to communicate effectively, according to different service characteristics, time division multiple access (TDMA) mode and CSMA mode or a combination of the above two modes are usually used to realize channel sharing between multiple sites. For services w...

AI Technical Summary

Problems solved by technology

However, this method has the problem that the maximum length of the back-off period increases linearly with the number of network sites, which increases the channel access overhead, reduces the channel utilization rate, and increases the channel access delay.

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