CN111800813B - Method and device for detecting narrow-band signal interference - Google Patents
Method and device for detecting narrow-band signal interference Download PDFInfo
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- CN111800813B CN111800813B CN201910276581.4A CN201910276581A CN111800813B CN 111800813 B CN111800813 B CN 111800813B CN 201910276581 A CN201910276581 A CN 201910276581A CN 111800813 B CN111800813 B CN 111800813B
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Abstract
The invention provides a method and a device for detecting narrowband signal interference, which are used for solving the problems of long time consumption and low efficiency in the prior art. The method comprises the following steps: the access network equipment acquires first interference measurement data of a cell, determines an average value of first uplink interference levels of M PRBs according to the first interference measurement data to obtain a first uplink average interference level, and determines an average value of first uplink received interference powers of the M PRBs under each subframe to obtain an average value of N first single subframe uplink received interference powers; determining the average value of the uplink received interference power average values of the first single sub-frames corresponding to the N sub-frames respectively to obtain a first uplink received interference power average value; and when the first uplink average interference level is determined to be smaller than a first threshold value, the first uplink received interference power average value is determined to be smaller than a second threshold value, and at least one first single subframe uplink received interference power average value is determined to be larger than a third threshold value, determining that the cell has narrowband signal interference.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for detecting narrowband signal interference.
Background
TDD-LTE (Time Division Long Term Evolution, Time Division duplex) is adopted, that is, a transmission signal and a reception signal are performed in different Time slots of the same frequency channel, and when there is a narrowband downlink signal source in the same frequency band around a network, it is easy to cause an IOT (Interference over Thermal) on a fixed RB (Resource Block) of a TDD-LTE cell to rise, that is, external narrowband Interference is generated, and the perception of a user under the network is affected.
At present, the narrow-band interference needs to be judged manually based on a large amount of index data, the time consumption is long, and the efficiency is low.
Disclosure of Invention
The invention provides a method and a device for detecting narrowband signal interference, which are used for solving the problems of long time consumption and low efficiency in the prior art.
In a first aspect, an embodiment of the present invention provides a method for detecting narrowband signal interference, including:
the method comprises the steps that access network equipment obtains first interference measurement data of a cell, wherein the first interference measurement data comprise first uplink interference levels of M Physical Resource Blocks (PRBs) occupied by a narrow-band bandwidth under the cell and first uplink receiving interference power of the M PRBs under each subframe in N uplink subframes of the cell;
the access network equipment determines the average value of the first uplink interference levels of the M physical resource blocks PRB to obtain a first uplink average interference level, and determines the average value of the first uplink received interference power of the M PRBs under each subframe to obtain the average value of the first single subframe uplink received interference power corresponding to the N subframes respectively;
the access network equipment determines the average value of the uplink received interference power average values of first single sub-frames corresponding to the N sub-frames respectively to obtain a first uplink received interference power average value;
and the access network equipment determines that the first uplink average interference level is smaller than a first threshold, the first uplink received interference power average value is smaller than a second threshold, and the access network equipment determines that the cell has narrowband signal interference when the first single subframe uplink received interference power average value corresponding to at least one subframe in the N subframes is larger than a third threshold.
In an optional implementation manner, after the access network device determines that there is narrowband signal interference in the cell, the method further includes:
after the access network equipment prohibits the cell from transmitting downlink signals, acquiring second interference measurement data of the cell, wherein the second interference measurement data comprises second uplink interference levels of M Physical Resource Blocks (PRBs) occupied by a narrow-band bandwidth under the cell and second uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
the access network equipment determines the average value of the second uplink interference levels of the M physical resource blocks PRB to obtain a second uplink average interference level, and determines the average value of the second uplink received interference power of the M PRBs under each subframe to obtain the average value of the second single subframe uplink received interference power corresponding to the N subframes respectively;
the access network equipment determines the average value of the uplink received interference power average values of second single sub-frames corresponding to the N sub-frames respectively to obtain a second uplink received interference power average value;
and the access network equipment determines that an interference source generating narrowband signal interference is an external interference source when the access network equipment determines that the second uplink average interference level is smaller than the first threshold, the second uplink received interference power average value is smaller than the second threshold, and the second single subframe uplink received interference power average value corresponding to at least one subframe in the N subframes is larger than a third threshold.
In an optional implementation manner, after the access network device determines that there is narrowband signal interference in the cell, the method further includes:
the access network equipment determines the maximum value of first uplink received interference power of the M PRBs in each subframe of N uplink subframes of the cell, wherein the maximum value of the first uplink received interference power corresponds to a first PRB in a first subframe;
the access network equipment performs frequency shift processing on the narrowband bandwidth to acquire third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
the access network equipment acquires the maximum value in the third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
and when the maximum value in the third uplink received interference power is determined to correspond to the first PRB under the first subframe, determining the narrowband interference source as a fixed interference source.
In an optional implementation manner, after the access network device determines that an interference source generating narrowband signal interference is an external interference source, the method further includes:
the access network equipment determines the maximum value of second uplink received interference power of the M PRBs in each subframe of N uplink subframes of the cell, wherein the maximum value of the second uplink received interference power corresponds to a second PRB in a second subframe;
the access network equipment performs frequency shift processing on the narrowband bandwidth to acquire third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
the access network equipment determines the maximum value of the third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
and when the maximum value in the third uplink received interference power is determined to correspond to the second PRB under the second subframe, determining the narrowband interference source as a fixed interference source.
In an optional implementation manner, the method further includes:
and when the narrowband signal interference source is determined to be a fixed interference source and an external interference source, sending an alarm indication to a network manager, wherein the alarm indication is used for indicating that the external fixed interference source generates narrowband signal interference on the access network equipment.
In a second aspect, an embodiment of the present invention provides an apparatus for detecting narrowband signal interference, including:
an obtaining unit, configured to obtain first interference measurement data of a cell, where the first interference measurement data includes first uplink interference levels of M physical resource blocks PRB occupied by a narrowband bandwidth in the cell, and first uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
a first determining unit, configured to determine an average value of first uplink interference levels of the M physical resource blocks PRB to obtain a first uplink average interference level, and determine an average value of first uplink received interference powers of the M PRBs under each subframe to obtain an average value of first single subframe uplink received interference powers corresponding to N subframes respectively; determining the average value of the uplink received interference power average values of the first single sub-frames corresponding to the N sub-frames respectively to obtain a first uplink received interference power average value;
a second determining unit, configured to determine that the first uplink average interference level is smaller than a first threshold, the first uplink received interference power average is smaller than a second threshold, and the access network device determines that narrowband signal interference exists in the cell when the first single subframe uplink received interference power average corresponding to at least one subframe of the N subframes is greater than a third threshold.
In an optional implementation, the apparatus further includes:
a prohibiting unit, configured to prohibit the cell from transmitting a downlink signal after the second determining unit determines that the narrowband signal interference exists in the cell;
the obtaining unit is further configured to obtain second interference measurement data of the cell after the prohibiting unit prohibits the cell from transmitting the downlink signal, where the second interference measurement data includes a second uplink interference level of M physical resource blocks PRB occupied by a narrowband bandwidth under the cell and a second uplink received interference power of the M PRBs under each of N uplink subframes of the cell;
the first determining unit is further configured to determine an average value of second uplink interference levels of the M physical resource blocks PRB to obtain a second uplink average interference level, and determine an average value of second uplink received interference powers of the M PRBs under each subframe to obtain an average value of second single subframe uplink received interference powers corresponding to the N subframes respectively; determining the average value of the uplink received interference power average values of the second single sub-frames corresponding to the N sub-frames respectively to obtain a second uplink received interference power average value;
the second determining unit is further configured to determine that a second uplink average interference level is smaller than a first threshold, a second uplink received interference power average value is smaller than a second threshold, and when a second single subframe uplink received interference power average value corresponding to at least one subframe of the N subframes is larger than a third threshold, the access network device determines that an interference source generating narrowband signal interference is an external interference source.
In an optional implementation manner, the first determining unit is further configured to determine, after the second determining unit determines that the cell has narrowband signal interference, a maximum value of first uplink received interference powers of the M PRBs in each of N uplink subframes of the cell, where the maximum value of the first uplink received interference powers corresponds to a first PRB in a first subframe;
the device further comprises:
the frequency shift unit is used for carrying out frequency shift processing on the narrow-band bandwidth;
the obtaining unit is further configured to obtain a third uplink received interference power of the M PRBs in each of N uplink subframes of the cell;
the first determining unit is further configured to determine a maximum value of third uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
the second determining unit is further configured to determine that the narrowband interference source is a fixed interference source when it is determined that the maximum value in the third uplink received interference power corresponds to the first PRB in the first subframe.
In an optional implementation manner, the first determining unit is further configured to determine, after the second determining unit determines that an interference source generating narrowband signal interference is an external interference source, a maximum value of second uplink received interference powers of the M PRBs in each of N uplink subframes of the cell, where the maximum value of the second uplink received interference powers corresponds to a second PRB in a second subframe;
the device further comprises:
the frequency shift unit is used for carrying out frequency shift processing on the narrow-band bandwidth;
the obtaining unit is further configured to obtain, after the frequency shift unit performs frequency shift processing on the narrowband bandwidth, third uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
the first determining unit is further configured to determine a maximum value of third uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
the second determining unit is further configured to determine that the narrowband interference source is a fixed interference source when it is determined that the maximum value in the third uplink received interference power corresponds to the second PRB in the second subframe.
In an optional implementation manner, the method further includes:
a sending unit, configured to determine, at the second determining unit, that the narrowband signal interference source is a fixed interference source and is an external interference source, and send an alarm indication to a network manager, where the alarm indication is used to indicate that there is an external fixed interference source that generates narrowband signal interference on the access network device.
In a third aspect, an embodiment of the present invention provides an access network device, including:
a memory and a processor;
a memory for storing program instructions;
and the processor is used for calling the program instructions stored in the memory and executing the method of any implementation mode of the first aspect according to the obtained program.
In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions, which, when executed on a computer, cause the computer to perform the above method.
The conventional interference analysis process is based on manual processing: the method and the system have the advantages that the preliminary analysis is firstly carried out based on the indexes, then the troubleshooting is carried out based on the screened interference cells, the scheme provided by the invention automatically analyzes through the interference detection and reports in an alarm mode, the time consumption is shorter, the efficiency is higher than that of the existing method, and the intelligent operation and maintenance can be realized.
Drawings
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for detecting narrowband signal interference according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another method for detecting interference of a narrowband signal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a device for detecting narrowband signal interference according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an access network device according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention can be applied to a 4G system, a 5G system or a new system generated in the future. The 4G system may be a Long Term Evolution (LTE) system, and the 5G system may be a New Radio (NR) system.
Fig. 1 illustrates an architecture of a communication system including an access network device and a terminal device.
A Terminal device, also called a Terminal, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a User, for example, a handheld device, a vehicle-mounted device, etc. with a wireless connection function. Currently, some examples of terminals are: a Mobile phone (Mobile phone), a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable Device, a Virtual Reality (VR) Device, an Augmented Reality (AR) Device, a wireless terminal in Industrial Control (Industrial Control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety, a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.
The Access network device related in the embodiment of the present invention may also be referred to as a base station or AN Access Node (Access Node, abbreviated as AN) to provide a wireless Access service for the terminal. The Access Node may be a Base Transceiver Station (BTS) in a Global System for Mobile communication (GSM) System or a Code Division Multiple Access (CDMA) System, a Base Station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) System, an evolved Node B (eNB or eNodeB) in an LTE System, or a Base Station device (gbb), a small Base Station device, a wireless Access Node (WiFi AP), a wireless interworking Microwave Access Base Station (WiMAX BS) in a future 5G network, which is not limited in this respect.
In the embodiment of the invention, the access network equipment receives the uplink signal from the terminal equipment in the uplink subframe.
Terms involved in the embodiments of the present invention are explained as follows.
1) The uplink subframe refers to a subframe for transmitting an uplink signal, and includes a subframe only for transmitting the uplink signal and a special subframe. For example, referring to table 1, table 1 is a TDD configuration table of an existing TDD LTE system. As shown in table 1, TDD configuration 2 is an uplink subframe with subframe numbers 1, 2, 6, and 7 according to the embodiment of the present invention.
TABLE 1
2) And uplink interference levels of M PRBs (physical resource blocks) occupied by the narrow-band bandwidth under the cell.
For example, the narrow band has a bandwidth of 20M, the frequency range of the bandwidth is 1880-1900kHz, such as 100PRB under the frequency range of the bandwidth. 100 PRBs each correspond to an uplink interference level.
3) The uplink average interference level is an average value of uplink interference levels of the M physical resource blocks PRB.
For example, each PRB of 100 PRBs corresponds to an interference level, and the uplink average interference level is an average value of the interference levels of 100 PRBs.
4) And receiving the uplink interference power of the M PRBs under each subframe in N uplink subframes of the cell.
For example, the narrow-band bandwidth is 20M, the frequency range of the bandwidth is 1880-1900kHz, for example, the frequency range of the bandwidth includes 100PRB, and the adopted subframe structure is TDD configuration 2 shown in table 1, that is, the uplink subframe includes subframe 1, subframe 2, subframe 6 and subframe 7. In subframe 1, each PRB of 100 PRBs corresponds to one received interference power, in subframe 2, each PRB of 100 PRBs corresponds to one received interference power, in subframe 6, each PRB of 100 PRBs corresponds to one uplink received interference power, and in subframe 7, each PRB of 100 PRBs corresponds to one uplink received interference power.
5) And averaging the uplink received interference power of the single subframe.
For example, the uplink subframe includes subframe 1, subframe 2, subframe 6, and subframe 7. In subframe 1, each PRB of 100 PRBs corresponds to one received interference power, in subframe 2, each PRB of 100 PRBs corresponds to one received interference power, in subframe 6, each PRB of 100 PRBs corresponds to one uplink received interference power, and in subframe 7, each PRB of 100 PRBs corresponds to one uplink received interference power. The single subframe uplink received interference power average value is an average value of received interference power of 100 PRBs in subframe 1, or an average value of received interference power of 100 PRBs in subframe 2, or an average value of received interference power of 100 PRBs in subframe 6, or an average value of received interference power of 100 PRBs in subframe 7.
6) And the average value of the uplink received interference power.
In subframe 1, each PRB of 100 PRBs corresponds to one received interference power in subframe 2, each PRB of 100 PRBs corresponds to one uplink received interference power in subframe 6, each PRB of 100 PRBs corresponds to one uplink received interference power in subframe 7, which includes 400 received interference powers in total, and then the uplink received interference power average value refers to an average value of the 400 received interference powers. Or the average value of the uplink received interference power of 4 single subframes can be averaged to obtain the average value of the uplink received interference power.
The plurality of the present invention means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. In addition, it should be understood that although the terms first, second, etc. may be used to describe various objects (such as uplink interference level, uplink received interference power, etc.) in the embodiments of the present invention, these data packets should not be limited by these terms. These terms are only used to distinguish objects from each other.
The embodiment of the invention provides a method and a device for detecting narrowband signal interference, which are used for determining whether narrowband interference exists in a cell or not through an uplink average interference level, a single subframe uplink received interference power average value and an uplink received interference power average value, so that manual participation is not needed, the detection efficiency is improved, and the detection time is shortened. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
Referring to fig. 2, a schematic flow chart of a method for detecting narrowband signal interference according to an embodiment of the present invention is provided. The method comprises the following steps:
s201, an access network device obtains first interference measurement data of a cell, where the first interference measurement data includes first uplink interference levels of M PRBs occupied by a narrowband bandwidth under the cell and first uplink received interference powers of the M PRBs under each of N uplink subframes of the cell.
Wherein M and N are both positive integers.
S202, the access network equipment determines an average value of first uplink interference levels of the M physical resource blocks PRB to obtain a first uplink average interference level, and determines an average value of first uplink received interference powers of the M PRBs under each subframe to obtain an average value of first single subframe uplink received interference powers corresponding to the N subframes respectively.
S203, the access network equipment determines the average value of the uplink received interference power average values of the first single sub-frames corresponding to the N sub-frames respectively to obtain the first uplink received interference power average value.
S204, when the access network equipment determines that the first uplink average interference level is smaller than a first threshold value, the first uplink received interference power average value is smaller than a second threshold value, and the first single subframe uplink received interference power average value corresponding to at least one subframe in the N subframes is larger than a third threshold value, the access network equipment determines that the cell has narrowband signal interference.
For example, the first threshold, the second threshold and the third threshold may be equal to the external maximum narrowband signal interference value that the cell can bear. For example, the first threshold and the second and third thresholds are equal to-105 dB.
In an optional implementation manner, when the access network device determines, according to the first interference measurement data, that any one of the following conditions, i.e., the first condition, the second condition, and the third condition, is not satisfied, the access network device determines that the cell does not have narrowband signal interference:
the first condition is as follows: the uplink average interference level is less than a first threshold.
And a second condition: and the average value of the uplink received interference power is smaller than a second threshold value.
And (3) carrying out a third condition: and the average value of the uplink received interference power of at least one single subframe is larger than a third threshold value.
In an optional implementation manner, after the access network device determines that the cell has narrowband signal interference, a device-side factor checking link is started. Specifically, after the access network device determines that the cell has narrowband signal interference, the access network device prohibits the cell from transmitting downlink signals, and then obtains second interference measurement data of the cell, where the second interference measurement data includes second uplink interference levels of M physical resource blocks PRB occupied by a narrowband bandwidth under the cell and second uplink received interference powers of the M PRBs under each of N uplink subframes of the cell, and M and N are positive integers;
the access network equipment determines the average value of the second uplink interference levels of the M physical resource blocks PRB to obtain a second uplink average interference level, and determines the average value of the second uplink received interference power of the M PRBs under each subframe to obtain the average value of the second single subframe uplink received interference power corresponding to the N subframes respectively;
the access network equipment determines the average value of the uplink received interference power average values of second single sub-frames corresponding to the N sub-frames respectively to obtain a second uplink received interference power average value;
and the access network equipment determines that an interference source generating narrowband signal interference is an external interference source when the access network equipment determines that the second uplink average interference level is smaller than the first threshold, the second uplink received interference power average value is smaller than the second threshold, and the second single subframe uplink received interference power average value corresponding to at least one subframe in the N subframes is larger than a third threshold.
In an optional implementation manner, when the access network device determines, according to the second interference measurement data, that any one of the first condition, the second condition, and the third condition is not satisfied, the access network device determines that the cause of narrowband signal interference generated by the cell is inside the device.
In an alternative implementation manner, in the embodiment of the present invention, whether the narrowband signal interference source is a fixed interference source may be determined in any manner.
The first mode is as follows: after the access network equipment determines that the cell has narrowband signal interference, the access network equipment determines the maximum value of first uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell, wherein the maximum value of the first uplink received interference power corresponds to the first PRB under the first subframe; the access network equipment performs frequency shift processing on the narrowband bandwidth to acquire third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell; the access network equipment acquires the maximum value in the third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell; and when the maximum value in the third uplink received interference power is determined to correspond to the first PRB under the first subframe, determining the narrowband interference source as a fixed interference source.
In a second manner, after the access network device determines that an interference source generating narrowband signal interference is an external interference source, the access network device determines a maximum value of second uplink received interference powers of the M PRBs in each of N uplink subframes of the cell, where the maximum value of the second uplink received interference powers corresponds to a second PRB in a second subframe; the access network equipment performs frequency shift processing on the narrowband bandwidth to acquire third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell; the access network equipment determines the maximum value of the third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell; and when the maximum value in the third uplink received interference power is determined to correspond to the second PRB under the second subframe, determining the narrowband interference source as a fixed interference source.
As an example, the shifting the narrow-band bandwidth refers to shifting the center frequency of the narrow-band bandwidth, for example, the narrow-band bandwidth is 1900kHz, and after shifting the frequency to the right by 5kHz, that is, after increasing by 5Hz, the narrow-band bandwidth is updated to 1905 kHz.
It should be noted that, for the execution sequence of performing the frequency shift processing and prohibiting the cell from transmitting the downlink signal, the embodiment of the present invention is not limited specifically, and the operation of prohibiting the cell from transmitting the downlink signal may be performed first, and after determining whether the cell belongs to the external interference source, the frequency shift processing operation is performed. Certainly, the frequency shift processing operation may also be performed first, and after determining whether the cell belongs to a fixed interference source, the cell is prohibited from transmitting the downlink signal.
In an optional implementation manner, when it is determined that the narrowband signal interference source is a fixed interference source and is an external interference source, an alarm indication is sent to a network manager, where the alarm indication is used to indicate that the external fixed interference source generates narrowband signal interference to the access network device. The network manager can thus prompt the optimizer to sweep to determine where the external fixed interference source is located.
The following describes an embodiment of the present invention in detail with reference to an application scenario, and the first threshold, the second threshold, and the third threshold are all equal to-105 dB.
Referring to fig. 3, a schematic flow chart of a method for detecting narrowband signal interference according to an embodiment of the present invention is shown.
S301, interference measurement data of the cell are obtained.
And S302, obtaining an uplink average interference level, a single subframe uplink received interference power average value and an uplink received interference power average value according to the interference measurement data. Taking 4 uplink subframes as an example, the uplink received interference power of a single subframe corresponding to subframe 1, subframe 2, subframe 6 and subframe 7 is taken as an example.
And S303, determining whether the uplink average interference level and the uplink received interference power average value are both less than-105 dB, and the uplink received interference power average value of at least one single subframe in 4 subframes is greater than-105 dB, if so, executing S304, and if not, executing S305.
S304, determining that the cell has the narrowband interference signal, executing an external interference source judgment process, and executing S306.
S305, ending the narrowband signal interference determination.
The following description will be made by taking an example of first performing the determination of whether the interference source is an external interference source and then performing the determination of whether the interference source is a fixed interference source.
S306, forbidding the cell to transmit the downlink signal, and executing S301-S303 again. At this time, an external interference source determination process is executed, if S303, it is determined whether both the uplink average interference level and the uplink received interference power average value are less than-105 dB, and at least one single subframe uplink received interference power average value in 4 subframes is greater than-105 dB, if yes, S307 is executed, and if not, S308 is executed.
S307, determining an interference source generating the narrowband signal interference as an external interference source, executing frequency shift processing, and executing S301-S303 again. At this time, an external fixed interference source judgment process is executed, if S303, it is determined whether both the uplink average interference level and the uplink received interference power average value are less than-105 dB, and the uplink received interference power average value of at least one single subframe in 4 subframes is greater than-105 dB, if so, S309 is executed, and if not, S310 is executed.
S308, determining that the narrowband signal interference exists in the access network equipment.
S309, determining the interference source generating the narrowband signal interference as an external fixed interference source. S311 is performed.
And S310, determining an interference source generating the narrowband signal interference as an external non-fixed interference source.
S311, sending an alarm instruction to the network manager. Wherein the alarm indication is used for indicating that an external fixed interference source generates narrowband signal interference to the access network equipment.
Based on the same inventive concept as the method embodiment, an embodiment of the present invention provides a device for detecting narrowband signal interference, which is shown in fig. 4. The detection device can be applied to the access network equipment, and can be implemented by one or processors in the access network equipment, or a chip system formed by one or more chips.
An obtaining unit 401, configured to obtain first interference measurement data of a cell, where the first interference measurement data includes first uplink interference levels of M physical resource blocks PRB occupied by a narrowband bandwidth in the cell and first uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
a first determining unit 402, configured to determine an average value of first uplink interference levels of the M physical resource blocks PRB to obtain a first uplink average interference level, and determine an average value of first uplink received interference powers of the M PRBs under each subframe to obtain an average value of first single subframe uplink received interference powers corresponding to N subframes respectively; determining the average value of the uplink received interference power average values of the first single sub-frames corresponding to the N sub-frames respectively to obtain a first uplink received interference power average value;
a second determining unit 403, configured to determine that the first uplink average interference level is smaller than a first threshold, the first uplink received interference power average is smaller than a second threshold, and when the first single subframe uplink received interference power average corresponding to at least one subframe of the N subframes is greater than a third threshold, the access network device determines that narrowband signal interference exists in the cell.
In an optional implementation, the apparatus further includes:
a prohibiting unit, configured to prohibit the cell from transmitting a downlink signal after the second determining unit 403 determines that the narrowband signal interference exists in the cell;
the obtaining unit 401 is further configured to obtain second interference measurement data of the cell after the prohibiting unit prohibits the cell from transmitting the downlink signal, where the second interference measurement data includes a second uplink interference level of M physical resource blocks PRB occupied by a narrowband bandwidth under the cell and a second uplink received interference power of the M PRBs under each of N uplink subframes of the cell;
the first determining unit 402 is further configured to determine an average value of second uplink interference levels of the M physical resource blocks PRB to obtain a second uplink average interference level, and determine an average value of second uplink received interference powers of the M PRBs under each subframe to obtain an average value of second single subframe uplink received interference powers corresponding to N subframes respectively; determining the average value of the uplink received interference power average values of the second single sub-frames corresponding to the N sub-frames respectively to obtain a second uplink received interference power average value;
the second determining unit 403 is further configured to determine that a second uplink average interference level is smaller than a first threshold, a second uplink received interference power average value is smaller than a second threshold, and when the second single subframe uplink received interference power average value corresponding to at least one subframe of the N subframes is greater than a third threshold, the access network device determines that an interference source generating narrowband signal interference is an external interference source.
In an optional implementation manner, the first determining unit 402 is further configured to determine, after the second determining unit 403 determines that the cell has narrowband signal interference, a maximum value of first uplink received interference powers of the M PRBs in each of N uplink subframes of the cell, where the maximum value of the first uplink received interference powers corresponds to a first PRB in a first subframe;
the device further comprises:
the frequency shift unit is used for carrying out frequency shift processing on the narrow-band bandwidth;
the obtaining unit 401 is further configured to obtain third uplink received interference power of the M PRBs in each of N uplink subframes of the cell;
the first determining unit 402 is further configured to determine a maximum value of third uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
the second determining unit 403 is further configured to determine that the narrowband interference source is a fixed interference source when it is determined that the maximum value in the third uplink received interference power corresponds to the first PRB in the first subframe.
In an optional implementation manner, the first determining unit 402 is further configured to determine, after the second determining unit 403 determines that an interference source generating narrowband signal interference is an external interference source, a maximum value of second uplink received interference powers of the M PRBs in each of N uplink subframes of the cell, where the maximum value of the second uplink received interference powers corresponds to a second PRB in a second subframe;
the device further comprises:
the frequency shift unit is used for carrying out frequency shift processing on the narrow-band bandwidth;
the obtaining unit 401 is further configured to obtain, after the frequency shift unit performs frequency shift processing on the narrowband bandwidth, third uplink received interference powers of the M PRBs under each of N uplink subframes of the cell;
the first determining unit 402 is further configured to determine a maximum value of third uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
the second determining unit 403 is further configured to determine that the narrowband interference source is a fixed interference source when it is determined that the maximum value in the third uplink received interference power corresponds to the second PRB in the second subframe.
In an optional implementation manner, the method further includes:
a sending unit 404, configured to send an alarm indication to a network manager when the second determining unit 403 determines that the narrowband signal interference source is a fixed interference source and is an external interference source, where the alarm indication is used to indicate that there is an external fixed interference source that causes narrowband signal interference to the access network device.
The division of the unit in the embodiments of the present invention is schematic, and is only a logical function division, and there may be another division manner in actual implementation, and in addition, each functional unit in each embodiment of the present invention may be integrated in one processor, may also exist alone physically, or may also be integrated in one unit by two or more units. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
An embodiment of the present invention further provides another access network device, as shown in fig. 5, including:
a communication interface 501, a memory 502, and a processor 503;
the access network device communicates with a terminal device through the communication interface 501, for example, receives data of the terminal device; a memory 502 for storing program instructions; the processor 503 is configured to invoke the program instructions stored in the memory 502, and execute the method executed by the access network device (or the base station) in the foregoing embodiments according to the obtained program.
In the embodiment of the present invention, the specific connection medium among the communication interface 501, the memory 502, and the processor 503 is not limited, for example, a bus, and the bus may be divided into an address bus, a data bus, a control bus, and the like.
In the embodiments of the present invention, the processor may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.
In the embodiment of the present invention, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, a random-access memory (RAM). The memory can also be, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in embodiments of the present invention may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.
The conventional interference analysis process is based on manual processing: the method and the system have the advantages that the preliminary analysis is firstly carried out based on the indexes, then the troubleshooting is carried out based on the screened interference cells, the scheme provided by the invention automatically analyzes through the interference detection and reports in an alarm mode, the time consumption is shorter, the efficiency is higher than that of the existing method, and the intelligent operation and maintenance can be realized.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for detecting narrowband signal interference, comprising:
the method comprises the steps that access network equipment obtains first interference measurement data of a cell, wherein the first interference measurement data comprise first uplink interference levels of M Physical Resource Blocks (PRBs) occupied by a narrow-band bandwidth under the cell and first uplink receiving interference power of the M PRBs under each subframe in N uplink subframes of the cell;
the access network equipment determines the average value of the first uplink interference levels of the M physical resource blocks PRB to obtain a first uplink average interference level, and determines the average value of the first uplink received interference power of the M PRBs under each subframe to obtain the average value of the first single subframe uplink received interference power corresponding to the N subframes respectively;
the access network equipment determines the average value of the uplink received interference power average values of first single sub-frames corresponding to the N sub-frames respectively to obtain a first uplink received interference power average value;
the access network equipment determines that a first uplink average interference level is smaller than a first threshold, a first uplink received interference power average value is smaller than a second threshold, and when a first single subframe uplink received interference power average value corresponding to at least one subframe in the N subframes is larger than a third threshold, the access network equipment determines that narrowband signal interference exists in the cell;
after the access network equipment prohibits the cell from transmitting downlink signals, acquiring second interference measurement data of the cell, wherein the second interference measurement data comprises second uplink interference levels of M Physical Resource Blocks (PRBs) occupied by a narrow-band bandwidth under the cell and second uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
the access network equipment determines the average value of the second uplink interference levels of the M physical resource blocks PRB to obtain a second uplink average interference level, and determines the average value of the second uplink received interference power of the M PRBs under each subframe to obtain the average value of the second single subframe uplink received interference power corresponding to the N subframes respectively;
the access network equipment determines the average value of the uplink received interference power average values of second single sub-frames corresponding to the N sub-frames respectively to obtain a second uplink received interference power average value;
and the access network equipment determines that an interference source generating narrowband signal interference is an external interference source when the access network equipment determines that the second uplink average interference level is smaller than the first threshold, the second uplink received interference power average value is smaller than the second threshold, and the second single subframe uplink received interference power average value corresponding to at least one subframe in the N subframes is larger than a third threshold.
2. The method of claim 1, wherein after the access network device determines that narrowband signal interference exists in the cell, the method further comprises:
the access network equipment determines the maximum value of first uplink received interference power of the M PRBs in each subframe of N uplink subframes of the cell, wherein the maximum value of the first uplink received interference power corresponds to a first PRB in a first subframe;
the access network equipment performs frequency shift processing on the narrowband bandwidth to acquire third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
the access network equipment acquires the maximum value in the third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
and when the maximum value in the third uplink received interference power is determined to correspond to the first PRB under the first subframe, determining the narrowband interference source as a fixed interference source.
3. The method of claim 1, wherein after the access network device determines that the interference source generating the narrowband signal interference is an external interference source, the method further comprises:
the access network equipment determines the maximum value of second uplink received interference power of the M PRBs in each subframe of N uplink subframes of the cell, wherein the maximum value of the second uplink received interference power corresponds to a second PRB in a second subframe;
the access network equipment performs frequency shift processing on the narrowband bandwidth to acquire third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
the access network equipment determines the maximum value of the third uplink received interference power of the M PRBs under each subframe in N uplink subframes of the cell;
and when the maximum value in the third uplink received interference power is determined to correspond to the second PRB under the second subframe, determining the narrowband interference source as a fixed interference source.
4. The method of claim 2 or 3, further comprising:
and when the narrowband signal interference source is determined to be a fixed interference source and an external interference source, sending an alarm indication to a network manager, wherein the alarm indication is used for indicating that the external fixed interference source generates narrowband signal interference on the access network equipment.
5. An apparatus for detecting narrowband signal interference, comprising:
an obtaining unit, configured to obtain first interference measurement data of a cell, where the first interference measurement data includes first uplink interference levels of M physical resource blocks PRB occupied by a narrowband bandwidth in the cell, and first uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
a first determining unit, configured to determine an average value of first uplink interference levels of the M physical resource blocks PRB to obtain a first uplink average interference level, and determine an average value of first uplink received interference powers of the M PRBs under each subframe to obtain an average value of first single subframe uplink received interference powers corresponding to N subframes respectively; determining the average value of the uplink received interference power average values of the first single sub-frames corresponding to the N sub-frames respectively to obtain a first uplink received interference power average value;
a second determining unit, configured to determine that a first uplink average interference level is smaller than a first threshold, a first uplink received interference power average value is smaller than a second threshold, and when a first single subframe uplink received interference power average value corresponding to at least one subframe of the N subframes is greater than a third threshold, it is determined that narrowband signal interference exists in the cell;
a prohibiting unit, configured to prohibit the cell from transmitting a downlink signal after the second determining unit determines that the narrowband signal interference exists in the cell;
the obtaining unit is further configured to obtain second interference measurement data of the cell after the prohibiting unit prohibits the cell from transmitting the downlink signal, where the second interference measurement data includes a second uplink interference level of M physical resource blocks PRB occupied by a narrowband bandwidth under the cell and a second uplink received interference power of the M PRBs under each of N uplink subframes of the cell;
the first determining unit is further configured to determine an average value of second uplink interference levels of the M physical resource blocks PRB to obtain a second uplink average interference level, and determine an average value of second uplink received interference powers of the M PRBs under each subframe to obtain an average value of second single subframe uplink received interference powers corresponding to the N subframes respectively; determining the average value of the uplink received interference power average values of the second single sub-frames corresponding to the N sub-frames respectively to obtain a second uplink received interference power average value;
the second determining unit is further configured to determine that an interference source generating narrowband signal interference is an external interference source when it is determined that the second uplink average interference level is smaller than the first threshold, the second uplink received interference power average value is smaller than the second threshold, and the second single subframe uplink received interference power average value corresponding to at least one subframe of the N subframes is greater than a third threshold.
6. The apparatus of claim 5, wherein:
the first determining unit is further configured to determine, after the second determining unit determines that the cell has narrowband signal interference, a maximum value of first uplink received interference powers of the M PRBs in each of N uplink subframes of the cell, where the maximum value of the first uplink received interference powers corresponds to a first PRB in a first subframe;
the device further comprises:
the frequency shift unit is used for carrying out frequency shift processing on the narrow-band bandwidth;
the obtaining unit is further configured to obtain a third uplink received interference power of the M PRBs in each of N uplink subframes of the cell;
the first determining unit is further configured to determine a maximum value of third uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
the second determining unit is further configured to determine that the narrowband interference source is a fixed interference source when it is determined that the maximum value in the third uplink received interference power corresponds to the first PRB in the first subframe.
7. The apparatus of claim 5, wherein:
the first determining unit is further configured to determine, after the second determining unit determines that an interference source generating narrowband signal interference is an external interference source, a maximum value of second uplink received interference powers of the M PRBs in each of N uplink subframes of the cell, where the maximum value of the second uplink received interference powers corresponds to a second PRB in a second subframe;
the device further comprises:
the frequency shift unit is used for carrying out frequency shift processing on the narrow-band bandwidth;
the obtaining unit is further configured to obtain, after the frequency shift unit performs frequency shift processing on the narrowband bandwidth, third uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
the first determining unit is further configured to determine a maximum value of third uplink received interference powers of the M PRBs in each of N uplink subframes of the cell;
the second determining unit is further configured to determine that the narrowband interference source is a fixed interference source when it is determined that the maximum value in the third uplink received interference power corresponds to the second PRB in the second subframe.
8. The apparatus of claim 6 or 7, further comprising:
and the sending unit is used for sending an alarm indication to a network manager when the second determining unit determines that the narrowband signal interference source is a fixed interference source and is an external interference source, wherein the alarm indication is used for indicating that the external fixed interference source generates narrowband signal interference on the device.
9. An access network device, comprising:
a memory and a processor;
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing the method of any one of claims 1 to 4 according to the obtained program.
10. A computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-4.
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