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A mass access method and system based on nb-iot

An access method and massive technology, applied in the field of wireless communication, to achieve the effect of excellent access success rate

Active Publication Date: 2022-03-25
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A mass access method and system based on nb-iot
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  • A mass access method and system based on nb-iot

Examples

Experimental program
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Embodiment 1

[0058] This embodiment provides an NB-IoT-based mass access method, see figure 1 , the method includes:

[0059] S1: Determine the number n of devices that initiate access in the current time slot t Whether it is less than the total number of preambles;

[0060] S2: If the judgment result is less than, randomly assign the preamble to all current time slot initiating access devices, otherwise first calculate the current energy consumption of each initiating access device O cur And according to this, it is divided into different priority groups, and the different priority groups include high energy consumption equipment groups and low energy consumption equipment groups;

[0061] Number of devices that initiate access in the current time slot n t :

[0062]

[0063] in,

[0064]

[0065] N is the total number of devices in the cell, the value of time slot t is t=1,2...L, L is the number of time slots, and the probability of accessing devices in each time slot is repre...

Embodiment 2

[0089] This embodiment provides a mass access method based on NB-IoT, which is introduced as follows by taking the NB-IoT system applied to a community as an example:

[0090] Assume that there are N NB-IoT devices in a single cell system, and the number of devices that initiate access in the current time slot is n t (including devices that failed the request in the previous cycle);

[0091] To calculate the current energy consumption, the current time slot initiating access device is divided into two different priority groups - high energy consumption equipment group and low energy consumption equipment group. The current energy consumption of the device is O cur Defined as the energy consumption P required for this transmission need and the current remaining energy P of the equipment last The ratio of:

[0092]

[0093] This application divides the equipment groups according to the average energy consumption and the cumulative energy consumption. The specific division...

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Abstract

The invention discloses an NB-IoT-based mass access method and system, belonging to the technical field of wireless communication. This method calculates the energy consumption of each time slot device, and divides the equipment into a high energy consumption device group and a low energy consumption device group according to the average energy consumption or the cumulative energy consumption, and then preferentially assigns the preamble to the high energy consumption device group, the remaining preamble and the high-energy device group conflict preamble are assigned to the low-energy device group; according to the cumulative energy consumption group, the number of high-energy devices is less, and the number of low-energy devices is more, so high-energy devices The group access success rate is better; the access success rate of the two groups of devices grouped according to the average energy consumption has improved and the gap is smaller, so if you focus on the group access performance of high-energy consumption devices, you can group them according to the cumulative energy consumption , if you want to balance the access performance of two different energy-consuming equipment groups, you can group them according to the average energy consumption; in both ways, the access success rate of this application is higher than that of the traditional allocation scheme.

Description

technical field [0001] The invention relates to an NB-IoT-based mass access method and system, and belongs 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W48/02H04W48/16H04L5/00
CPCH04W4/70H04W48/02H04W48/16H04L5/0048Y02D30/50
Inventor 李正权李梦雅林媛马可陆波丁文杰
Owner JIANGNAN UNIV
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