KR-102961929-B1 - Apparatus and Method for Measuring Channel Interference in a Narrowband Wireless Communication Network

KR102961929B1KR 102961929 B1KR102961929 B1KR 102961929B1KR-102961929-B1

Abstract

The method for measuring channel interference in a narrowband wireless communication network according to the present invention is a method for measuring channel interference of channels in a narrowband wireless communication network that performs communication through a selected channel among a plurality of frequency-divided narrowband channels, and may include: a step of recognizing a wireless communication idle period of a narrowband wireless communication network device; a step of switching the channel used by the receiver of the device to a channel to be measured for interference; a step of measuring the received signal strength of the receiver of the device switched to the channel to be measured for interference; and a step of comparing the measured received signal strength of the receiver with a predetermined reference value to determine the degree of interference of the channel to be measured for interference.

Inventors

김영현
박명혜
윤종희
최호준
길대영

Assignees

한국전력공사

Dates

Publication Date: 20260508
Application Date: 20220524

Claims (10)

A method for measuring channel interference of the channels of a narrowband wireless communication network, which is performed in an e-WSN device equipped with low-specification hardware that communicates via a selected channel, which is a mutually agreed-upon dedicated channel among a plurality of frequency-divided narrowband channels, in a configuration where devices are connected to a gateway (or base station) and the gateway (or base station) is connected to a platform (AS). A step of recognizing a wireless communication idle period of the above-mentioned narrowband wireless communication network device; A step of switching the usage channel of the receiving end of the above device to a channel that is the interference measurement target; A step of measuring the received signal strength of the receiving end of the device switched to the channel that is the interference measurement target; and A step of comparing the measured received signal strength of the receiver with a predetermined reference value to determine the degree of interference of the channel that is the interference measurement target. Includes, In the step of recognizing the above wireless communication pause period, A method for measuring channel interference in a narrowband wireless communication network, wherein the time between the uplink and downlink that occurs according to the e-WSN operation logic during the wireless communication process of the narrowband wireless communication network device is recognized as the wireless communication idle period, so as to perform channel measurement excluding a segment defined in advance as resource transmission via RACH or RAR in the time of the SCH channel.
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In paragraph 1, In the step of switching to the channel that is the target of the interference measurement above, A method for measuring channel interference in a narrowband wireless communication network that controls a mixer or bandpass filter for selecting the frequencies of signals input to the receiving end of the above device.
In paragraph 3, In the step of measuring the received signal strength, A method for measuring channel interference in a narrowband wireless communication network, wherein the signal strength of a channel to be measured for interference is measured by measuring the signal strength converted to baseband at the receiving end of the above device, and the interference is measured and recorded by rotating through the channels in a Round-Robin manner whenever a channel interference measurement time occurs.
In paragraph 1, After the step of checking the degree of interference of the above channel, A step of transmitting channel interference information to an upper facility as information regarding the signal strength measured in the above channel and the degree of interference of the above channel. A method for measuring channel interference in a narrowband wireless communication network including further
In paragraph 5, A step of verifying the communication quality of the channel by calculating the RSSI through the signal strength measured in the channel and the channel interference information. A method for measuring channel interference in a narrowband wireless communication network including further
In a narrowband wireless communication network based on an e-WSN device equipped with low-specification hardware that performs communication via a selected channel among multiple frequency-divided narrowband channels, wherein devices are connected to a gateway (or base station) and the gateway (or base station) is connected to a platform (AS), A channel switching unit that switches the usage channel of the receiving end of the above-mentioned narrowband wireless communication network device to a channel that is the target of interference measurement; A strength measuring unit for measuring the received signal strength of the receiving end of the device switched to the channel that is the interference measurement target; and An interference measurement control unit that checks the degree of interference of the channel subject to interference measurement using the channel switching unit and the strength measuring unit during the wireless communication idle period of the above-mentioned narrowband wireless communication network device. Includes, The above interference measurement control unit is, A channel interference measuring device in a narrowband wireless communication network that utilizes the mutual switching time between the uplink and downlink occurring according to the e-WSN operation logic during the wireless communication process of the narrowband wireless communication network device as the wireless communication idle period, so as to perform channel measurement excluding a section defined in advance as resource transmission via RACH or RAR in the time of the SCH channel.
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In Paragraph 7, The above channel switching unit is, A channel interference measuring device in a narrowband wireless communication network that controls a mixer and a bandpass filter for selecting the frequencies of signals input to the receiving end of the above device.
In Paragraph 9, The above intensity measuring unit is, A channel interference measuring device in a narrowband wireless communication network that measures the signal strength of a channel subject to interference measurement by measuring the signal strength converted to baseband at the receiving end of the above device.

Description

Apparatus and Method for Measuring Channel Interference in a Narrowband Wireless Communication Network The present invention relates to a channel measurement and allocation and management method for channel interference mitigation, and to a device for the same, a channel interference measurement device and method in a narrowband wireless communication network. The e-WSN (energy-Wireless Sensor Network) recently developed by KEPCO is a narrowband wireless communication technology developed as part of a plan to build a private communication network. It offers wide coverage due to the excellent diffraction and penetration of the 380Hz UHF band, transmission speeds 15 times faster than TETRA (Trunked Radio Service) technology at the same frequency using the QAM (Quadrature Amplitude Modulation) modulation method, and stable communication performance as there are no signal interference issues due to the characteristics of the licensed band. Based on this e-WSN system, it is being utilized in various IoT (Internet of Things) businesses as well as power control where latency of less than 1 second and stability are important. Through this, it is expected to be used as a communication technology for the advancement of power grids, thereby resolving the problems of annually increasing rental costs and communication outages caused by blind spots. For an e-WSN system to function as a stable wireless communication network, it is of utmost importance to utilize channel management technology operating in the 25kHz bandwidth of the licensed 380MHz band, that is, to ensure that channels used by adjacent terminals and base stations do not overlap. To this end, the operating system stores and utilizes the frequency channels used by terminals and base stations in a management dB table. Channel 55 of the 380 MHz band, which is the licensed band used by the e-WSN system, is a resource allocated and used exclusively by KEPCO, but there are cases where other services intermittently use the band, channel interference caused by jamming signals, or even cases where the same channel is used due to configuration errors between equipment built by KEPCO. As a result, when different signals are generated and transmitted on the same channel, mutual interference occurs, leading to problems such as performance degradation and communication interruption. Furthermore, when providing communication services over a wide coverage area of more than 10 km using e-WSN technology, the issue of inter-channel interference is expected to increase even further. To address these on-site issues and performance degradation caused by channel interference, wireless equipment managers periodically measure and manage wireless quality using communication quality measurement devices in the field or by installing measuring instruments at base stations; however, the reality is that it is difficult to respond to interference because it occurs at unspecified times and locations. FIG. 1 is a configuration diagram showing a representative system in which the proposed technology according to the concept of the present invention can be utilized. FIG. 2 is according to the concept of the present invention A flowchart illustrating an example of a method for measuring channel interference in a narrowband wireless communication network. FIG. 3a is a circuit diagram illustrating the device stage structure on an e-WSN system having the basic configuration of FIG. 1. FIG. 3b is a circuit diagram showing a part that configures the logic for measuring channel interference according to the concept of the present invention at the device stage on an e-WSN system. FIG. 4 is a data frame configuration diagram illustrating the channel allocation and data transmission process at the device level. Figure 5 is a transaction flowchart showing the process of setting and collecting channel information. Figure 6 is a transaction flowchart illustrating the channel information update process. FIG. 7 is a waveform diagram showing an example of a channel interference measurement result measured according to the concept of the present invention. FIG. 8 is a block diagram illustrating an embodiment of a channel interference measurement device in a narrowband wireless communication network according to the concept of the present invention. In describing the present invention, terms such as first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms are intended solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. When it is mentioned that a component is connected to or coupled with another component, it can be understood that it may be directly connected to or coupled with that other component, or that there may be other compo