Mass access scheme based on NB-IoT

Abstract

The invention discloses a mass access scheme based on NB-IoT, and belongs to the technical field of wireless communication. The method comprises the following steps: calculating the energy consumption degree of equipment in each time slot, dividing the equipment into a high-energy-consumption-degree equipment group and a low-energy-consumption-degree equipment group according to the average energy consumption degree or the accumulated energy consumption degree, then preferentially allocating lead codes to the high-energy-consumption-degree equipment group, and allocating residual lead codes and high-energy-consumption-degree equipment group conflict lead codes to the low-energy-consumption-degree equipment group; the number of high-energy-consumption equipment being smaller and the number of low-energy-consumption equipment being larger under the condition of grouping according to the accumulated energy consumption, so that the access success rate of the high-energy-consumption equipment group is better; the access success rates of the two groups of equipment under the grouping according to the average energy consumption degree are improved and the difference is smaller, so that grouping can be carried out according to the accumulated energy consumption degree if the access performance of the high-energy-consumption equipment group is emphasized, and grouping can be carried out according to the average energy consumption degree if the access performance of the two different energy consumption equipment groups needs to be balanced. In the two modes, the access success rate of the method is higher than that of a traditional allocation scheme.

Description

technical field [0001] The invention relates to an NB-IoT-based mass access scheme, belonging to the technical field of wireless communication. Background technique [0002] NB-IoT (Narrowband Internet of Things, narrowband Internet of Things) has the characteristics of low power consumption, long battery life, and long-distance deep coverage. The Internet of Things scenario is one of the most promising directions for low-power wide-area services. [0003] As of the end of February 2020, the number of NB-IoT device connections of the three major domestic operators has exceeded 100 million. With the rapid development of the Internet of Things business and the migration of 2G / 3G networks, NB-IoT, as a type of machine-type communication, It will undertake most of the original 2G / 3G connections after the frequency reduction and de-network, which means that NB-IoT will face the pressure and challenges of massive terminal connections. [0004] Existing technologies mainly allevi...

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Problems solved by technology

[0005] In order to further improve the access success rate of NB-IoT devices in large-scale access scenarios without causing iterative complexity problems, the present invention provides a mass access method based on NB-IoT. The method first calculates the Device energy consumption, and according to the average energy consumption or cumulative energy consumption, the equipment is divided into high energy consumption equipment group and low energy consumption equipment group, and then the preamble is assigned to the high energy consumption equipment group first, and the remaining If the preamble conflicts with the high-energy device group, the preamble is assigned to the low-energy device group, and each device accesses according to the assigned preamble

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