Network access method, NB-IoT chip, NB-IoT terminal and computer storage medium

Abstract

The invention provides a network access method, an NB-IoT chip, an NB-IoT terminal and a computer storage medium, the network access method is applied to the NB-IoT chip, the NB-IoT chip obtains i frequency points through frequency sweeping operation, i is greater than or equal to 1, and the network access method comprises the following steps: according to signal feature data of a service cell under the j-th frequency point in the i frequency points, determining the j-th frequency point in the i frequency points, serving cells searched under the jth frequency point are screened to obtain candidate access cells, j is larger than or equal to 1 and smaller than or equal to i, and the signal characteristic data comprise at least one of RSRP and SINR; the NB-IoT chip demodulates the system message and the RRC message of the candidate access cell under the jth frequency point; and if the NB-IoT chip successfully demodulates the system message and the RRC message of the at least one candidate access cell under the jth frequency point, the NB-IoT chip accesses the candidate access cell of which the system message is successfully demodulated under the jth frequency point, so that the success rate of the network access process is ensured, the network access time delay is reduced, and the power consumption of the NB-IoT chip or the NB-IoT terminal is saved.

Description

technical field [0001] The embodiments of the present application relate to the technical field of the Internet of Things, and in particular, to a network access method, an NB-IoT chip, an NB-IoT terminal, and a computer storage medium. Background technique [0002] The Internet of Things (IoT) is a cellular-based narrowband IoT technology that supports cellular data connections for low-power devices in the WAN. entered application scenarios. With the implementation of the NB-IoT protocol at the 3GPP summit with the evolution of 5G, a solid foundation has been laid for the sustainable development of NB-IoT (Narrow Band-Internet of Things) technology. NB-IoT technology is 20dB higher than the existing network coverage gain, which is equivalent to improving the coverage area capability by 100 times. This gain is mainly improved by the combined gain of a large number of retransmissions to improve coverage performance, but NB-IoT chips or Whether the terminal can quickly and s...

AI Technical Summary

Problems solved by technology

However, according to the configuration of the actual live network of the operator, the frequency points used by all the serving cells in a fixed area are the same frequency point, which will cause interference within the system, that is, the occurrence of co-frequency interference

The existence of co-channel interference will cause the NB-IoT chip or terminal to search for serving cells on the frequency point, and will search for many non-real serving cells or serving cells with extremely poor signal quality. In the case of dense base stations, multipath and multipath fading, many non-real serving cells or serving cells with extremely poor signal quality will be searched, resulting in a low success rate for NB-IoT chips or terminals to access serving cells. Low, large network access delay, high power consumption, etc.

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