Unlock instant, AI-driven research and patent intelligence for your innovation.

Random access method, device and system

A technology of random access and access request, applied in the field of wireless communication, can solve the problems of insufficient proportion of operators and lack of effective search solutions for receiving equipment, and achieve the effect of effective search

Active Publication Date: 2020-11-06
COMBA TELECOM SYST CHINA LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are about 4 billion IoT terminals connected to the Internet globally, but only about 230 million terminals are connected to the operator's network, and operators account for less than 6% of the IoT market
[0004] During the implementation process, the inventors found that there are at least the following problems in the traditional technology: the current NB-IOT system lacks an effective search solution for the receiving device to the user

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Random access method, device and system
  • Random access method, device and system
  • Random access method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0048] Generally speaking, a preamble sequence of NPRACH includes 4 symbol groups (symbol group), and a symbol group includes 5 groups; the signals sent on all symbol groups of NPRACH are the same, the signal is "1", and each subcarrier The difference between the signals is that the corresponding center frequency points are inconsistent, that is, the frequency points of each symbol group in the frequency mapping are different.

[0049] However, in this application, the frequency domain data is cyclically shifted in the search phase, and then multiple retransmitted signals ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a random access method, a device and a system, wherein, the random access method comprises the following steps: if the sub-carrier with the largest combined power in the current search is the initial sub-carrier, and the combined power of the initial sub-carrier is greater than the power threshold, the initial sub-carrier is confirmed as an effective carrier; The user corresponding to the active carrier is marked as the active user for this search. In the searching phase, the frequency domain data is cyclic shifted, and then the signals retransmitted many times are combined to obtain the combined power, and the effective carrier is confirmed based on the combined power, and the effective user is detected. After receiving the data sent by the user, the receiving device can correctly receive the access request of the user after adopting the application scheme to process the data. The present application can effectively search users with different coverage levelsof NPRACH.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a random access method, device and system. Background technique [0002] The communications industry has been looking forward to the IoT market for 10 years, but because the traditional 2G, 3G, and 4G networks do not meet the requirements of low power consumption and low cost for IoT devices, most IoT devices have been connected mainly using Wi-Fi (WIreless-FIdelity), Bluetooth and other free technologies. At present, there are about 4 billion IoT terminals connected to the Internet globally, but only about 230 million terminals are connected to the operator's network, and operators account for less than 6% of the IoT market. [0003] There are many kinds of IoT communication technologies, which can be divided into the following in terms of transmission distance: one is short-distance communication technology, and representative technologies include ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W48/16H04L5/00
CPCH04L5/003H04W48/16H04W74/0833Y02D30/70
Inventor 张维付杰尉刁穗东
Owner COMBA TELECOM SYST CHINA LTD