Wired communication method supporting multiple users

Abstract

The invention discloses a wired communication method supporting multiple users, which comprises the following steps of: grouping all users in each group of subnets, and obtaining a channel competitionconfiguration comprising a frequency point frequency band, a priority level, a maximum competition window, a maximum back-off window and upper and lower limits of an accessible time slot by all the users in each group after grouping; enabling the central node to determine the channel competition configuration of the group according to the number of users in different groups and the success rate of transmission in the group, and determining the channel competition configuration of the group by using the success rate of PRS competition in the group. The invention overcomes the defect that the rate of the existing power line carrier equipment is obviously reduced in the presence of a large number of users, and designs a user access mechanism capable of supporting the simultaneous access of alarge number of users to the power line carrier equipment.

Description

technical field [0001] The invention belongs to the technical field of power line carrier communication, and in particular relates to a wired communication method supporting multiple users. Background technique [0002] Power line carrier communication supports contention access transmission mode, that is, at the same time, all users on the same power line first listen to whether there is someone transmitting data in the channel, if not, back off a transmission waiting delay, and a user competes to the channel sending opportunities such as figure 1 The sender starts to send data. If there is only one user sending in this time slot, the user succeeds in competing for the channel, and other users will hear the data sent by the user and enter the backoff phase, such as figure 1 Competing user 1 in , the backoff window is 6, which is less than the sender’s 4, so when the sender sends, it detects the sender’s sending and starts to back off. The transmission waiting delay can be...

AI Technical Summary

Problems solved by technology

[0004] Based on the current power carrier communication system, if the number of users increases, the probability of collision in the entire system will increase significantly, and the transmission efficiency is very low

On the other hand, since power carrier communication usually uses power lines as the transmission medium, and the power grid is usually a fully connected network architecture, all users connected to the power grid share the same medium and share the transmission bandwidth, so the large number of users At the same time, the transmission resources assigned to each user are more limited. In particular, for PRS resources, when there are many users with the same priority on the power carrier, for example, the number of transformers that need to send control signals becomes very large. When , the PRS between these users is also indistinguishable from each other, and it still cannot solve the competition conflict among users in the group

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