Time slot communication method based on micropower wireless technology

Abstract

The invention relates to a time slot communication method based on a micropower wireless technology, which comprises the following steps: registering slaves, and establishing a mapping table of an identification number and an index number of each slave in a host; after the host is initialized, when the set data interrogation time is reached, sending a slave awakening instruction and immediately entering a receiving state; reporting data in sequence according to the index numbers via the the registered slave; when all the slaves communicate normally, changing the time slot states correspondingto the slaves in sequence via the host to complete the current round of data interrogation; after the current round of data reporting, initiating a network access request by checking the RSSI value when the network is idle, and judging whether a new slave is allowed to join the network or not by the host according to the time slot use condition; if so, executing the registration in the step 1 by the slave, and waiting for the next round of awakening to finish data interrogation. Data interaction of a question-answer mode and an active reporting mode is absorbed, the time for completing a roundof data collection can be effectively shortened, and wireless signal conflicts can be effectively prevented.

Description

technical field [0001] The invention relates to the field of time slot communication, in particular to a time slot communication method based on micropower wireless technology. Background technique [0002] At present, the mainstream micro-power wireless IC adopts the half-duplex communication mode, and if there are multiple contacts sending data at the same time on the same channel, data errors will be caused by signal conflicts. Therefore, in order to avoid these problems, the development based on this technology The data interaction between smart devices mainly adopts the following two methods: 1. The master regularly queries the slave for data. 2. The slave judges whether the channel is idle by detecting the RSSI value of the channel, and sends data actively if it is idle. [0003] Method 1 is a question and answer method, which can effectively avoid signal conflicts, but both the master and the slave need to switch TX / RX modes frequently, and in order to ensure the corr...

AI Technical Summary

Problems solved by technology

[0003] Method 1 is a question and answer method, which can effectively avoid signal conflicts, but both the master and the slave need to switch TX / RX modes frequently, and in order to ensure the correct completion of the question and answer process, the master usually needs to do "send and wait to receive" "Operation, if the reception is abnormal or timed out due to some reasons, the entire question-and-answer process will take a long time, and in actual applications, there may be dozens or even hundreds of slaves under a master, so that The data real-time performance of the devices in the entire LAN will be very poor

[0004] The second method is the active reporting method, the host can always be in the receiving state, and the slave will send data immediately when it detects that the RSSI value of the channel is lower than the set level when it needs to send data. This method can effectively solve the problem of consumption in the first method The time is too long, but there is a large signal conflict problem, because when multiple slaves need to send data, it is very likely that everyone will detect that the channel is idle at the same time t1, and then send data together. Of course, there is a random delay. method, but this random value cannot be predicted, and the time it takes for each slave to send data is not fixed, so it cannot effectively solve the problem of signal conflict

Images