CN110266414B - Method and system for detecting interference caused by radio station - Google Patents

Method and system for detecting interference caused by radio station Download PDF

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Publication number
CN110266414B
CN110266414B CN201910625690.2A CN201910625690A CN110266414B CN 110266414 B CN110266414 B CN 110266414B CN 201910625690 A CN201910625690 A CN 201910625690A CN 110266414 B CN110266414 B CN 110266414B
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dmrs
base station
sinr
radio station
terminal
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CN110266414A (en
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卜智勇
谌晓清
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Chengdu Zhongke Micro Information Technology Research Institute Co Ltd
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Chengdu Zhongke Micro Information Technology Research Institute Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

The invention discloses a method and a system for detecting interference caused by a radio station, wherein the method comprises the following steps: a base station receives uplink data transmission of a terminal; the base station measures the DMRS of each RB of the air interface resource used by the uplink data transmission of the terminal; the base station calculates the SINR of the DMRS of each RB; and the base station judges whether the base station is interfered by the radio station signal according to the SINR of the DMRS of each RB. The invention judges whether the RB is interfered by the radio station signal by the SINR of the DMRS of each RB in the uplink transmission process, can realize the detection of the interference caused by the radio station, and finds the specific interference of the radio station.

Description

Method and system for detecting interference caused by radio station
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and a system for detecting interference caused by a radio station.
Background
In the existing national power communication system, wireless communication is mostly communication equipment based on radio stations, and the power system is relying on the radio stations to ensure communication of the power system so as to maintain safe operation of a national power grid. Meanwhile, the national power system is also planning a new generation communication system of national power based on the current broadband system.
This leads to the coexistence of radio stations and new generation broadband communication technologies in the national grid for a period of time in the future, and this trend is still long due to the advantages of the unique confidentiality of the radio stations and the like, in view of the importance of the national grid to the national security.
At present, the first objective of handling air interface interference caused by an electric tower is to find a specific interference location of a radio station or avoid interference means. The national power grid uses RB bandwidth which is consistent with the radio station bandwidth, and simultaneously uses the frequency hopping technology to realize interference randomization, code block grouping retransmission or base station cycle does not transmit and receive data at special time, but performs intermediate and exclusive measurement.
These existing techniques either tolerate station-induced interference by sacrificing transmission efficiency over the air interface or sacrifice valuable processing power of the base station.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in view of the above problems, a method and system for detecting interference caused by a station are provided.
The invention provides a method for detecting interference caused by a radio station, which comprises the following steps:
a base station receives uplink data transmission of a terminal;
the base station measures the DMRS of each RB of the air interface resource used by the uplink data transmission of the terminal;
the base station calculates the SINR of the DMRS of each RB;
and the base station judges whether the base station is interfered by the radio station signal according to the SINR of the DMRS of each RB.
Further, the method for the base station to determine whether the radio station signal interference is received according to the SINR of the DMRS of each RB is as follows:
the base station records the SINR of the DMRS of each RB as xiWherein i represents the ith RB; calculating the average value of SINRs of all RBs, and recording the average value as avg;
the base station judges whether the SINR of the DMRS of each RB meets the condition avg-x one by onei>m, if yes, judging that the RB is interfered by the radio station signal; where m is the set threshold.
Preferably, the set threshold m is not less than the sensitivity difference of adjacent mcs selection steps.
The invention also provides a system for detecting the interference caused by the radio station, which comprises a terminal and a base station; the base station includes:
the receiving module is used for receiving the uplink data transmission of the terminal;
the measurement module is used for measuring the DMRS of each RB of the air interface resources used by the uplink data transmission of the terminal;
a calculation module, configured to calculate an SINR of the DMRS of each RB;
and the judging module is used for judging whether the radio station signal interference exists according to the SINR of the DMRS of each RB.
Further, the determining module is specifically configured to mark SINR of DMRS of each RB as xiWherein i represents the ith RB; calculating the average value of SINRs of all RBs, and recording the average value as avg; judging whether the SINR of the DMRS of each RB meets the condition avg-x one by onei>m, if yes, judging that the RB is interfered by the radio station signal; where m is the set threshold.
Preferably, the set threshold m is not less than the sensitivity difference of adjacent mcs selection steps.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention judges whether the RB is interfered by the radio station signal by the SINR of the DMRS of each RB in the uplink transmission process, can realize the detection of the interference caused by the radio station, and finds the specific interference of the radio station.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flow chart of a method of detecting station-induced interference according to the present invention.
Fig. 2-3 are block diagrams of the architecture of a system for detecting station-induced interference in accordance with the present invention.
Reference numerals: the method comprises the steps of 10-a base station, 11-a receiving module, 12-a measuring module, 13-a calculating module, 14-a judging module and 20-a terminal.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The method for detecting interference caused by a radio station provided in this embodiment, as shown in fig. 1, includes:
the base station 10 receives the uplink data transmission of the terminal 20;
the base station 10 measures a DMRS (Demodulation Reference Signal) of each RB of an air interface resource used for uplink data transmission by the terminal 20;
the base station 10 calculates SINR (Signal to Interference plus Noise Ratio) of the DMRS of each RB;
and the base station 10 judges whether the base station is interfered by the radio station signal according to the SINR of the DMRS of each RB.
The DMRS (Demodulation Reference Signal) of each RB is measured, and the SINR (Signal to Interference plus Noise Ratio) of the DMRS of each RB is calculated, which may be implemented according to the prior art of LTE. If the RB is interfered by the radio station signal, the SINR of the DMRS fluctuates due to the interference of the radio station signal, so that the invention can judge whether the RB is interfered by the radio station signal or not according to the SINR of the DMRS of each RB. The specific method comprises the following steps:
the base station 10 records the SINR of the DMRS of each RB as xiWherein i represents the ith RB; calculating the average value of SINRs of all RBs, and recording the average value as avg;
the base station 10 judges whether the SINR of the DMRS of each RB satisfies the condition avg-x one by onei>m, if yes, judging that the RB is interfered by the radio station signal; where m is the set threshold.
Through the above process, since the SINR of the DMRS fluctuates due to the radio station signal interference, the RB whose SINR of the DMRS is smaller than the average avg may be preliminarily determined as being subjected to the radio station signal interference, and in order to avoid the influence of small fluctuations in the SINR of the DMRS of the RB caused by other factors, the determination is performed by setting a threshold. In this embodiment, the set threshold m is not less than a sensitivity difference of a Modulation and Coding Scheme (Modulation and Coding strategy) selected order of adjacent mcs.
Example 2
Based on the method for detecting interference caused by a radio station provided in embodiment 1, this embodiment provides a system for detecting interference caused by a radio station, as shown in fig. 2, including a terminal 20 and a base station 10; the base station includes:
a receiving module 11, configured to receive uplink data transmission of the terminal 20;
a measurement module 12, configured to measure a DMRS of each RB of an air interface resource used by the terminal 20 for uplink data transmission;
a calculating module 13, configured to calculate an SINR of the DMRS of each RB;
and the judging module 14 is configured to judge whether the radio station signal interferes with the DMRS of each RB according to the SINR of the DMRS of each RB.
The determining module 14 is specifically configured to mark SINR of DMRS of each RB as xiWherein i represents the ith RB; calculating the average value of SINRs of all RBs, and recording the average value as avg; judging whether the SINR of the DMRS of each RB meets the condition avg-x one by onei>m, if yes, judging that the RB is interfered by the radio station signal; where m is the set threshold.
As can be seen from the operation process of the determining module 14, since the SINR of the DMRS fluctuates due to the interference of the radio station signal, the RB whose SINR of the DMRS is smaller than the average avg may be primarily determined as being interfered by the radio station signal, and in order to avoid the influence of small fluctuations in the SINR of the DMRS of the RB caused by other factors, the determination is performed by setting a threshold. In this embodiment, the set threshold m is not less than a sensitivity difference of a Modulation and Coding Scheme (Modulation and Coding strategy) selected order of adjacent mcs.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (2)

1. A method for detecting station-induced interference, comprising:
a base station receives uplink data transmission of a terminal;
the base station measures the DMRS of each RB of the air interface resource used by the uplink data transmission of the terminal;
the base station calculates the SINR of the DMRS of each RB;
the base station judges whether the base station is interfered by the radio station signal according to the SINR of the DMRS of each RB;
the method for judging whether the radio station signal interference is received or not by the base station according to the SINR of the DMRS of each RB comprises the following steps:
the base station records the SINR of the DMRS of each RB as xiWherein i represents the ith RB; calculating the average value of SINRs of all RBs, and recording the average value as avg;
the base station judges whether the SINR of the DMRS of each RB meets the condition avg-x one by onei>m, if yes, judging that the RB is interfered by the radio station signal; wherein m is a set threshold; the set threshold m is not less than the sensitivity difference of adjacent mcs selection orders.
2. A system for detecting interference caused by a radio station, comprising a terminal and a base station; the base station includes:
the receiving module is used for receiving the uplink data transmission of the terminal;
the measurement module is used for measuring the DMRS of each RB of the air interface resources used by the uplink data transmission of the terminal;
a calculation module, configured to calculate an SINR of the DMRS of each RB;
the judging module is used for judging whether the radio station signal is interfered by the SINR of the DMRS of each RB;
the determining module is specifically configured to mark SINR of DMRS of each RB as xiWherein i represents the ith RB; calculating the average value of SINRs of all RBs, and recording the average value as avg; judging whether the SINR of the DMRS of each RB meets the condition avg-x one by onei>m, if satisfied, judgingThe RB is interfered by a station signal; wherein m is a set threshold; the set threshold m is not less than the sensitivity difference of adjacent mcs selection orders.
CN201910625690.2A 2019-07-11 2019-07-11 Method and system for detecting interference caused by radio station Active CN110266414B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101572562A (en) * 2008-05-04 2009-11-04 凌阳电通科技股份有限公司 Method for eliminating interference
WO2011087272A3 (en) * 2010-01-18 2011-12-01 Lg Electronics Inc. A method and an apparatus for providing channel quality information in a wireless communication system
CN104052700A (en) * 2014-05-27 2014-09-17 北京创毅视讯科技有限公司 LTE system anti-interference method and device
CN104468026A (en) * 2013-09-24 2015-03-25 普天信息技术研究院有限公司 Selecting method and device of modulation coding scheme
CN105721070A (en) * 2014-12-05 2016-06-29 中国移动通信集团公司 Method and device for interference detection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101572562A (en) * 2008-05-04 2009-11-04 凌阳电通科技股份有限公司 Method for eliminating interference
WO2011087272A3 (en) * 2010-01-18 2011-12-01 Lg Electronics Inc. A method and an apparatus for providing channel quality information in a wireless communication system
CN104468026A (en) * 2013-09-24 2015-03-25 普天信息技术研究院有限公司 Selecting method and device of modulation coding scheme
CN104052700A (en) * 2014-05-27 2014-09-17 北京创毅视讯科技有限公司 LTE system anti-interference method and device
CN105721070A (en) * 2014-12-05 2016-06-29 中国移动通信集团公司 Method and device for interference detection

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