CN109121142B - Method and device for detecting GPS out-of-step cell - Google Patents
Method and device for detecting GPS out-of-step cell Download PDFInfo
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- CN109121142B CN109121142B CN201710487748.2A CN201710487748A CN109121142B CN 109121142 B CN109121142 B CN 109121142B CN 201710487748 A CN201710487748 A CN 201710487748A CN 109121142 B CN109121142 B CN 109121142B
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Abstract
The invention discloses a method and a device for detecting a GPS (global positioning system) out-of-step cell, which are used for solving the technical problem that manual inspection of GPS out-of-step interference is time-consuming and labor-consuming and realizing automatic detection of the GPS out-of-step cell. The method comprises the following steps: determining a change rule of interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe; determining whether the change rule of the interference power is the same as the change rule of a power pattern of a reference signal of a downlink subframe of the wireless network cell; and when the change rule of the interference power is determined to be the same as the change rule of the power pattern of the reference signal, determining that the wireless network cell is a GPS out-of-step cell.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a method and a device for detecting a GPS out-of-step cell.
Background
With the continuous progress of the wireless communication technology, a Time Division duplex Long-Term Evolution (TDD-LTE) system is widely used due to its advantages of flexibly supporting different bandwidths, high spectrum utilization rate, and the like.
The TDD-LTE System is a network-wide synchronization System, and requires strict time synchronization between all base stations, and currently, the base stations of the TDD-LTE System generally adopt a Global Positioning System (GPS) to achieve synchronization.
The frame structure of the TDD-LTE system is shown in fig. 1. The duration of a radio frame (radio frame) occupied in the time domain is 10ms, and includes 10 subframes (subframes), subframe # 0 to subframe # 9, and the duration of each subframe occupied in the time domain is 1 ms. Each subframe occupies two slots (slots), and each slot occupies 0.5ms in time domain. In each subframe, a downlink pilot time slot (DwPTS) for transmitting downlink control signaling and downlink data, an uplink pilot time slot (UpPTS) for transmitting uplink control signaling and uplink data, and a guard interval time slot (GP) therebetween are included. The TDD-LTE system is divided into an uplink subframe and a downlink subframe. The cells covered by the same frequency all use the same uplink and downlink subframe configuration, each base station uses a GPS module to acquire time information, the 10ms alignment between the stations is ensured, and further, the downlink subframe signals with strong power cannot fall into the uplink subframes of the adjacent base stations to interfere the uplink subframes of the adjacent base stations.
In the actual use process, the base station causes GPS out-of-step (off tracking) due to a GPS module failure or an antenna installation problem, and thus, a downlink signal of the base station may fall into an uplink subframe of an adjacent base station, causing interference to the adjacent base station, and seriously affecting communication quality.
In order to ensure the communication quality, the detection mode of the GPS out-of-step interference in the prior art is manual frequency sweep inspection. The method comprises the steps of screening sites with poor communication quality from a plurality of base stations, analyzing whether the sites with poor communication quality are caused by interference or not, if so, analyzing whether a GPS is out of step or not, and if the GPS module cannot monitor signal abnormality by itself, reporting the sites to a management station. The mode is time-consuming and labor-consuming due to manual troubleshooting.
Disclosure of Invention
The invention provides a method and a device for detecting a GPS out-of-step cell, which are used for realizing the automatic detection of the GPS out-of-step cell.
The invention provides a method for detecting a GPS out-of-step cell in a first aspect, which comprises the following steps
Determining a change rule of interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe;
determining whether the change rule of the interference power is the same as the change rule of a power pattern of a reference signal of a downlink subframe of the wireless network cell;
and when the change rule of the interference power is determined to be the same as the change rule of the power pattern of the reference signal, determining that the wireless network cell is a GPS out-of-step cell.
In a possible embodiment, the determining a variation law of the interference power of the uplink subframe of the wireless network cell in the LTE system includes:
acquiring M interference powers of M symbols of each uplink subframe in N uplink subframes in the wireless network cell within preset frequency domain scheduling time; wherein M, N is a positive integer;
determining an average interference power of each of the M symbols in the N uplink subframes;
and determining the change rule of the interference power of the uplink subframe of the wireless network cell based on the average interference power of each symbol in the N uplink subframes.
In a possible embodiment, the determining a variation law of the interference power of the uplink subframe of the wireless network cell based on the average interference power of each symbol in the N uplink subframes includes:
determining K target interference powers from the M average interference powers; the K target interference powers are the front K bits of the M average interference powers which are arranged from large to small; wherein K is a positive integer less than M;
calculating the average value of M-K average interference powers except the K target interference powers in the M average interference powers;
obtaining the ratio of each target interference power in the K target interference powers to the average value to obtain K ratios;
determining P ratios of which the ratios are greater than or equal to a first preset threshold value from the K ratios; wherein P is a positive integer less than or equal to K;
when P is larger than or equal to a second preset threshold value, determining P symbols corresponding to the P ratios;
and obtaining a change rule of the interference power according to a difference set, wherein the difference set comprises the difference of every two symbol indexes in the P symbol indexes of the P symbols.
In a possible embodiment, the determining whether a variation law of the interference power is the same as a variation law of a power pattern of a reference signal of a downlink subframe of the wireless network cell includes:
obtaining Q symbol indexes of Q symbols with power values larger than a preset power value in the power pattern of the reference signal; wherein Q is a positive integer;
obtaining a change rule of the power pattern of the reference signal according to a target difference value set, wherein the target difference value set comprises a difference value of every two symbol indexes in Q symbol indexes of the Q symbols;
determining whether the set of difference values is a subset of a target set;
when the difference value set is a subset of the target set, determining that the change rule of the interference power is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell; otherwise, determining that the change rule of the interference power is different from the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell.
In a possible embodiment, after the determining that the wireless network cell is a GPS out-of-sync cell, the method further includes:
and reporting the wireless network cell to a management device of the wireless communication system.
A second aspect of the present invention provides a GPS out-of-step cell detection apparatus, including:
the first determining module is used for determining the change rule of the interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe;
a second determining module, configured to determine whether a change rule of the interference power is the same as a change rule of a power pattern of a reference signal of a downlink subframe of the wireless network cell;
and the third determining module is used for determining that the wireless network cell is a GPS out-of-step cell when the change rule of the interference power is determined to be the same as the change rule of the power pattern of the reference signal.
In a possible implementation manner, the first determining module is specifically configured to:
acquiring M interference powers of M symbols of each uplink subframe in N uplink subframes in the wireless network cell within preset frequency domain scheduling time; wherein M, N is a positive integer;
determining an average interference power of each of the M symbols in the N uplink subframes;
and determining the change rule of the interference power of the uplink subframe of the wireless network cell based on the average interference power of each symbol in the N uplink subframes.
In a possible implementation manner, the first determining module is specifically configured to:
determining K target interference powers from the M average interference powers; the K target interference powers are the front K bits of the M average interference powers which are arranged from large to small; wherein K is a positive integer less than M;
calculating the average value of M-K average interference powers except the K target interference powers in the M average interference powers;
obtaining the ratio of each target interference power in the K target interference powers to the average value to obtain K ratios;
determining P ratios of which the ratios are greater than or equal to a first preset threshold value from the K ratios; wherein P is a positive integer less than or equal to K;
when P is larger than or equal to a second preset threshold value, determining P symbols corresponding to the P ratios;
and obtaining a change rule of the interference power according to a difference set, wherein the difference set comprises the difference of every two symbol indexes in the P symbol indexes of the P symbols.
In a possible implementation manner, the second determining module is specifically configured to:
obtaining Q symbol indexes of Q symbols with power values larger than a preset power value in the power pattern of the reference signal; wherein Q is a positive integer;
obtaining a change rule of the power pattern of the reference signal according to a target difference value set, wherein the target difference value set comprises a difference value of every two symbol indexes in Q symbol indexes of the Q symbols;
determining whether the set of difference values is a subset of a target set;
when the difference value set is a subset of the target set, determining that the change rule of the interference power is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell; otherwise, determining that the change rule of the interference power is different from the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell.
In a possible embodiment, the apparatus further comprises:
and the sending module is used for reporting the wireless network cell to the management equipment of the wireless communication system.
A third aspect of the embodiments of the present invention provides a device for detecting a GPS out-of-step cell, including a processor, a memory, and a transceiver, where the transceiver receives and transmits data under the control of the processor, the memory stores a preset program, the processor reads the program in the memory, and executes the following processes according to the program:
the processor determines the change rule of the interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe;
the processor determines whether the change rule of the interference power is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell;
and when the change rule of the interference power is determined to be the same as the change rule of the power pattern of the reference signal, the processor determines that the wireless network cell is a GPS out-of-step cell.
In a possible implementation manner, a processor acquires M interference powers of M symbols of each uplink subframe in N uplink subframes in the wireless network cell within preset frequency domain scheduling time; determining an average interference power of each of the M symbols in the N uplink subframes; determining a change rule of the interference power of the uplink subframe of the wireless network cell based on the average interference power of each symbol in the N uplink subframes; wherein M, N is a positive integer.
In a possible embodiment, the processor determines K target interference powers from the M average interference powers; the K target interference powers are the front K bits of the M average interference powers which are arranged from large to small; calculating the average value of M-K average interference powers except the K target interference powers in the M average interference powers; obtaining the ratio of each target interference power in the K target interference powers to the average value to obtain K ratios; determining P ratios of which the ratios are greater than or equal to a first preset threshold value from the K ratios; when P is larger than or equal to a second preset threshold value, determining P symbols corresponding to the P ratios; obtaining a change rule of the interference power according to a difference set, wherein the difference set comprises a difference value of every two symbol indexes in the P symbol indexes of the P symbols; wherein P is a positive integer less than or equal to K, wherein K is a positive integer less than M.
In a possible implementation manner, the processor obtains Q symbol indexes of Q symbols with a power value greater than a preset power value in a power pattern of the reference signal; obtaining a change rule of the power pattern of the reference signal according to a target difference value set, wherein the target difference value set comprises a difference value of every two symbol indexes in Q symbol indexes of the Q symbols; determining whether the set of difference values is a subset of a target set; wherein Q is a positive integer; when the difference set is a subset of the target set, determining that the change rule of the interference power is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell; otherwise, determining that the change rule of the interference power is different from the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell.
In a possible embodiment, the transceiver reports the wireless network cell to a management device of the wireless communication system.
The technical scheme in the embodiment of the invention has the following beneficial effects:
in the technical scheme provided by the embodiment of the invention, the difference value of the symbol power and the signal power of an uplink subframe of a certain wireless network cell in a wireless communication system is determined, the change rule of the interference power of the wireless network cell is determined, then the change rule of the interference power of the determined uplink subframe is compared with the change rule of the power pattern of a reference signal of a downlink subframe of the wireless network cell, and the wireless network cell is determined to be a GPS out-of-step cell if the change rules of a plurality of interference powers are the same as the change rule of the power pattern of the reference signal.
Drawings
Fig. 1 is a schematic diagram of a frame structure of an LTE system in the prior art;
fig. 2 is a flowchart of a method for detecting a GPS out-of-sync cell according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a power pattern of a reference signal of a wireless network cell a according to an embodiment of the present invention;
fig. 4 is a block diagram of a GPS out-of-step cell detection apparatus according to an embodiment of the present invention;
fig. 5 is another block diagram of a GPS out-of-step cell detection apparatus according to an embodiment of the present invention.
Detailed Description
The invention provides a method and a device for detecting a GPS out-of-step cell, which are used for realizing the automatic detection of the GPS out-of-step cell.
In order to solve the technical problems, the general idea of the invention is as follows:
in the technical scheme provided by the embodiment of the invention, the difference value of the symbol power and the signal power of an uplink subframe of a certain wireless network cell in a wireless communication system is determined, the change rule of the interference power of the wireless network cell is determined, then the change rule of the interference power of the determined uplink subframe is compared with the change rule of the power pattern of a reference signal of a downlink subframe of the wireless network cell, and the wireless network cell is determined to be a GPS out-of-step cell if the change rules of a plurality of interference powers are the same as the change rule of the power pattern of the reference signal.
In order to better understand the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the examples of the present invention are the detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features of the embodiments and the examples of the present invention can be combined with each other without conflict.
Referring to fig. 2, a flowchart of a method for detecting a GPS out-of-step cell is provided for a first aspect of the embodiments of the present invention, where the method includes the following steps:
s101: determining a change rule of interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe;
s102: determining whether the change rule of the interference power is the same as the change rule of a power pattern of a reference signal of a downlink subframe of the wireless network cell;
s103: and when the change rule of the interference power is determined to be the same as the change rule of the power pattern of the reference signal, determining that the wireless network cell is a GPS out-of-step cell.
In this embodiment of the present invention, the wireless communication system may be a 3G communication system, such as an LTE system, or may also be a 4G communication system, a New Radio (NR) system, or another communication system requiring time synchronization, which is not illustrated here. In the following description, the method provided by the embodiment of the present invention will be described in detail by taking the wireless communication system as an LTE system and applying the method to a management station in the LTE system as an example. The management station may specifically be a certain base station in the LTE system, or may be a device dedicated for managing the base station, which is not limited herein.
When the technical scheme in the embodiment of the invention is adopted to detect the GPS out-of-step cell, the step S101 is executed firstly, namely: determining a change rule of interference power of an uplink subframe of a wireless network cell in a wireless communication system; and the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe.
In the embodiment of the present invention, the specific implementation manner of step S101 is as follows:
a1, obtaining M interference powers of M symbols of each uplink subframe in N uplink subframes in the wireless network cell within preset frequency domain scheduling time; wherein M, N is a positive integer;
a2, determining the average interference power of each symbol in the M symbols in the N uplink subframes;
a3, determining the variation rule of the interference power of the uplink sub-frame of the wireless network cell based on the average interference power of each symbol in the N uplink sub-frames.
In the specific implementation process, it is described by taking an example of detecting whether the wireless network cell a in the LTE system is a GPS out-of-step cell. In order to accurately detect the interference power of the uplink subframe in the wireless network cell a, a management station of the LTE system first needs to acquire N uplink subframes from the wireless network cell a, where the N uplink subframes may specifically be multiple uplink subframes within a preset time period, for example, all uplink subframes in the wireless network cell a within 2 minutes; or the value of N may be preset, and any N uplink subframes are obtained from the wireless network cell a, of course; and may be obtained in other manners, which are not limited herein. Then, the management station of the LTE system performs interference power measurement on the N uplink subframes. In the embodiment of the present invention, the interference power is measured in the following manner:
1) and determining the total power of each symbol in each uplink subframe in the N uplink subframes in the frequency domain scheduling time.
In the LTE system, one uplink subframe includes 14 symbols in the frequency domain, and the management station needs to perform interference power measurement on 14 symbols in each of N uplink subframes. Taking the calculation of the interference power of 14 symbols in the uplink subframe 1 as an example, the interference power of any symbol is: the difference of the total power and the signal power. E.g. calculating symbol l of uplink subframe 1Total power P (l)all(ii) a Then calculating the signal power P (l) of the symbol 1signalObtaining the interference power of symbol 1 as I (l) ═ P (l)signal-P(l)signal. The interference power of the other 13 symbols in the uplink subframe 1 can be determined by the same method. And so on, so as to determine the interference power of 14 symbols of each uplink subframe in the N uplink subframes.
2) And determining the average interference power of each symbol in the M symbols in the N uplink subframes.
After obtaining the interference power of 14 symbols of each uplink subframe in the N uplink subframes, an average value is obtained for each symbol, for example, the interference power of symbol 1 of each uplink subframe is added, and then divided by N, so as to obtain the average interference power of symbol 1 in the N uplink subframes. And so on, to obtain the average interference power of each of the 14 symbols.
3) And determining the change rule of the interference power of the uplink subframe of the wireless network cell A based on the average interference power of each symbol.
In the embodiment of the present invention, the specific implementation manner of step 3) is as follows:
b1, determining K target interference powers from the M average interference powers; the K target interference powers are the front K bits of the M average interference powers which are arranged from large to small; wherein K is a positive integer less than M;
b2, calculating an average value of M-K average interference powers except the K target interference powers from the M average interference powers;
b3, obtaining the ratio of each target interference power in the K target interference powers to the average value to obtain K ratios;
b4, determining P ratios of which the ratios are more than or equal to a first preset threshold value from the K ratios; wherein P is a positive integer less than or equal to K;
b5, when P is larger than or equal to a second preset threshold, determining P symbols corresponding to the P ratios;
b6, obtaining the change rule of the interference power according to a difference set, where the difference set includes the difference between every two symbol indexes in the P symbol indexes of the P symbols.
Following the example of detecting whether the wireless network cell a in the LTE system is a GPS out-of-step cell, after the management station obtains the average interference power of each of 14 symbols, first determining a plurality of symbols with larger interference power from the 14 symbols, specifically, sorting the average interference power of the 14 symbols from large to small, and obtaining K symbols ranked first, where K is a preset value, and K is, for example, 4; an interference power threshold may also be preset, and as long as the average interference power of a certain symbol is greater than the interference power threshold, the interference power of the symbol is considered to be greater, which is not limited herein. Taking K4 as an example, the management station obtains 4 symbols with higher interference power from 14 symbols, which are symbol 1, symbol 5, symbol 8, and symbol 12, respectively. Then, average interference power of the remaining 10 symbols is averaged to obtain IavgThe average interference power of symbol 1, symbol 5, symbol 8 and symbol 12 is compared with IavgAre divided to obtain a ratio I1/Iavg、I5/Iavg、I8/Iavg、I12/Iavg(ii) a Comparing the 4 ratios with a first preset threshold, where the first preset threshold may be obtained through simulation or actual test on the wireless network cell a, for example, may be 9db, and if the ratio is greater than the first preset threshold, it is considered as suspected downlink interference, and a symbol index of a symbol corresponding to the ratio, for example, I1/Iavg、I5/Iavg、I8/IavgIf the measured values are respectively greater than the first preset threshold, the symbol 1, the symbol 5 and the symbol 8 are considered to be suspected downlink interference, and the symbol indexes are recorded as 1, 5 and 8. If the number of the symbols determined as suspected downlink interference is greater than a second predetermined threshold, for example, the second predetermined threshold is 2, since the symbols 1, 5 and 8 are determined as suspected downlink interference, 3>2, therefore, the difference between the symbol indexes of the symbol 1, the symbol 5 and the symbol 8 is taken as the change rule of the interference power of the wireless network cell a, namely, the difference between the symbol indexes of the symbol 1 and the symbol 5 is 4, and the difference between the symbol 1 and the symbol 8 is 4The difference of the symbol indexes is 7, and the difference of the symbol indexes between the symbol 5 and the symbol 8 is 3, so that the interference power variation law of the wireless network cell a is {3, 4,7 }.
After step S101 is completed, the method in the embodiment of the present invention performs step S102, that is: and determining whether the change rule of the interference power is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell.
In the embodiment of the present invention, the specific implementation manner of step S102 is as follows:
c1, obtaining Q symbol indexes of Q symbols with power values greater than a preset power value in the power pattern of the reference signal; wherein Q is a positive integer;
c2, obtaining a change rule of the power pattern of the reference signal according to a target difference set, where the target difference set includes a difference between every two symbol indexes in Q symbol indexes of the Q symbols;
c3, determining whether the difference value set is a subset of the target set.
Following the example of detecting whether the wireless network cell a in the LTE system is a GPS out-of-step cell, after the management station determines that the interference power variation rule of the wireless network cell a is {3, 4, 7}, it needs to obtain the variation rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell a. Taking a Downlink subframe of an LTE system as a 2-port and a subframe in which a Physical Downlink Shared Channel/Physical Downlink control Channel (PDSCH/PDCCH) occupies fewer Resource Blocks (RBs) as an example, a power pattern of a reference signal of a wireless network cell a is shown in fig. 3, and a plurality of symbols having a power value greater than a preset power value are determined according to the power pattern of the reference signal. The preset power value may be a fixed value, or may be obtained by averaging the power values of each symbol in the power pattern of the reference signal, which is not limited herein. As can be seen from fig. 3, the downlink subframe reference signal of the LTE system has higher time domain power at symbols 0,4,7, and 11 and lower power at other symbols, so as to obtain symbol indexes 0,4,7, and 11, and then the difference between two symbol indexes is used as the change rule of the power pattern of the reference signal, that is, the difference between the symbol indexes of symbol 0 and symbol 4 is 4, the difference between the symbol indexes of symbol 0 and symbol 7 is 7, the difference between the symbol indexes of symbol 0 and symbol 11 is 11, the difference between the symbol indexes of symbol 4 and symbol 7 is 3, the difference between the symbol indexes of symbol 4 and symbol 11 is 3, and the difference between the symbol indexes of symbol 7 and symbol 11 is 4, so that the change rule of the power pattern of the reference signal is {3, 4,7, and 11 }. Certainly, the change rule of the power pattern of the reference signal of the downlink subframe needs to be determined according to the actual configuration condition of the wireless network cell a, when the configuration parameters are different, the change rule of the power pattern of the reference signal of the downlink subframe may change correspondingly, and the change rule of the power pattern of the reference signal of the downlink subframe is not limited herein.
And finally, determining whether the change rule of the interference power is the same as the change rule of the power pattern of the reference signal or not by judging whether the set of the change rules of the interference power of the wireless network cell A is a subset of the set of the change rules of the power pattern of the reference signal or not. When the set of interference power change rules is a subset of the set of power pattern change rules, determining that the change rule of the interference power is the same as the change rule of the power pattern; otherwise, determining that the change rule of the interference power is different from the change rule of the power pattern of the reference signal.
After step S102 is completed, the method in the embodiment of the present invention performs step S103, that is: and when the change rule of the interference power is determined to be the same as the change rule of the power pattern of the reference signal, determining that the wireless network cell is a GPS out-of-step cell.
Following the above example, since the set {3, 4, 7} is a subset of the set {3, 4,7,11 }, the management station determines that the change rule of the interference power of the uplink subframe of the wireless network cell a is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the cell, thereby determining that the wireless network cell a is a GPS out-of-step cell.
After step S103 is completed, the method in the embodiment of the present invention further includes:
and reporting the wireless network cell to a management device of the wireless communication system.
By using the example of detecting whether the wireless network cell a in the LTE system is the GPS out-of-step cell, after determining that the wireless network cell a is the GPS out-of-step cell, the management station reports the cell identifier or the cell configuration information of the wireless network cell a to the management station, so that the management station can adjust the wireless network cell a in time to remove interference.
Therefore, in the technical scheme provided by the embodiment of the invention, the change rule of the interference power of the wireless network cell is determined, then the determined change rule of the interference power of the uplink subframe is compared with the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell, and the pattern characteristic of the reference signal of the downlink subframe is utilized to automatically identify the uplink subframe, so that the GPS out-of-step cell is automatically found without manual inspection, and the method for automatically detecting the GPS out-of-step is provided, and the detection efficiency is improved.
A second aspect of the present invention provides an apparatus for detecting a GPS out-of-sync cell, where the apparatus may be a base station in a wireless communication system such as an LTE system or an NR system, for example, a macro base station or a home base station, and may also be a management device of the wireless communication system such as an LTE system or an NR system, for example, a relay device. Referring to fig. 4, a schematic structural diagram of a device for detecting a GPS out-of-step cell according to an embodiment of the present invention is shown, where the device includes:
a first determining module 401, configured to determine a change rule of interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe;
a second determining module 402, configured to determine whether a variation law of the interference power is the same as a variation law of a power pattern of a reference signal of a downlink subframe of the wireless network cell;
a third determining module 403, configured to determine that the wireless network cell is a GPS out-of-step cell when it is determined that the change rule of the interference power is the same as the change rule of the power pattern of the reference signal.
Since the detection apparatus for a GPS out-of-step cell provided by the second aspect of the present invention is proposed under the same concept as the detection method for a GPS out-of-step cell provided by the first aspect of the present invention, various variations and specific embodiments of the detection method for a GPS out-of-step cell in the foregoing embodiments of fig. 2 to 3 are also applicable to the detection apparatus for a GPS out-of-step cell of the present embodiment, and through the foregoing detailed description of the detection method for a GPS out-of-step cell, a person skilled in the art can clearly know the implementation process of the detection apparatus for a GPS out-of-step cell in the present embodiment, and therefore, for the brevity of the description, detailed description is omitted here.
A third aspect of the present invention provides an apparatus for detecting a GPS out-of-sync cell, where the apparatus may be a base station in a wireless communication system such as an LTE system and an NR system, for example, a base station (such as a macro base station and a home base station), or may be a management device of the wireless communication system such as the LTE system and the NR system, for example, a relay device. Referring to fig. 5, a block diagram of an apparatus for detecting a GPS out-of-sync cell according to an embodiment of the present invention is shown in fig. 5, where the apparatus mainly includes a processor 501, a memory 502, and a transceiver 503, where the transceiver 503 receives and transmits data under the control of the processor 501, the memory 502 stores a preset program, and the processor 501 reads the program in the memory 502, and executes the following processes according to the program:
the processor 501 determines a change rule of interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe;
the processor 501 determines whether the change rule of the interference power is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell;
when it is determined that the variation law of the interference power is the same as that of the power pattern of the reference signal, the processor 501 determines that the wireless network cell is a GPS out-of-step cell.
Where in fig. 5 the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 501 and various circuits of memory represented by memory 502, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 503 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 501 is responsible for managing the bus architecture and general processing, and the memory 502 may store data used by the processor 501 in performing operations.
Since the detection apparatus for a GPS out-of-step cell provided by the third aspect of the present invention is proposed under the same concept as the detection method for a GPS out-of-step cell provided by the first aspect of the present invention, various variations and specific embodiments of the detection method for a GPS out-of-step cell in the foregoing embodiments of fig. 2 to 3 are also applicable to the detection apparatus for a GPS out-of-step cell of the present embodiment, and through the foregoing detailed description of the detection method for a GPS out-of-step cell, a person skilled in the art can clearly know the implementation process of the detection apparatus for a GPS out-of-step cell in the present embodiment, so that details are not described here for the sake of brevity of description.
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, 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.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and 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 (6)
1. A method for detecting a GPS out-of-step cell, the method comprising:
determining a change rule of interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe;
determining whether the change rule of the interference power is the same as the change rule of a power pattern of a reference signal of a downlink subframe of the wireless network cell;
when the change rule of the interference power is determined to be the same as the change rule of the power pattern of the reference signal, determining that the wireless network cell is a GPS out-of-step cell;
the determining of the change rule of the interference power of the uplink subframe of the wireless network cell in the LTE system comprises the following steps:
acquiring M interference powers of M symbols of each uplink subframe in N uplink subframes in the wireless network cell within preset frequency domain scheduling time; wherein M, N is a positive integer;
determining an average interference power of each of the M symbols in the N uplink subframes;
determining a change rule of the interference power of the uplink subframe of the wireless network cell based on the average interference power of each symbol in the N uplink subframes;
wherein the determining a variation law of the interference power of the uplink subframe of the wireless network cell based on the average interference power of each symbol in the N uplink subframes comprises:
determining K target interference powers from the M average interference powers; the K target interference powers are the front K bits of the M average interference powers which are arranged from large to small; wherein K is a positive integer less than M;
calculating the average value of M-K average interference powers except the K target interference powers in the M average interference powers;
obtaining the ratio of each target interference power in the K target interference powers to the average value to obtain K ratios;
determining P ratios of which the ratios are greater than or equal to a first preset threshold value from the K ratios; wherein P is a positive integer less than or equal to K;
when P is larger than or equal to a second preset threshold value, determining P symbols corresponding to the P ratios;
and obtaining a change rule of the interference power according to a difference set, wherein the difference set comprises the difference of every two symbol indexes in the P symbol indexes of the P symbols.
2. The method of claim 1, wherein the determining whether the interference power has a variation law that is the same as a variation law of a power pattern of a reference signal of a downlink subframe of the wireless network cell comprises:
obtaining Q symbol indexes of Q symbols with power values larger than a preset power value in the power pattern of the reference signal; wherein Q is a positive integer;
obtaining a change rule of the power pattern of the reference signal according to a target difference value set, wherein the target difference value set comprises a difference value of every two symbol indexes in Q symbol indexes of the Q symbols;
determining whether the set of difference values is a subset of a target set;
when the difference value set is a subset of the target set, determining that the change rule of the interference power is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell; otherwise, determining that the change rule of the interference power is different from the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell.
3. The method of claim 1 or 2, wherein after the determining that the wireless network cell is a GPS out-of-sync cell, the method further comprises:
and reporting the wireless network cell to a management device of the wireless communication system.
4. An apparatus for detecting a GPS out-of-sync cell, the apparatus comprising:
the first determining module is used for determining the change rule of the interference power of an uplink subframe of a wireless network cell in a wireless communication system; the interference power of the uplink subframe is the difference value of the symbol power of the uplink subframe and the signal power of the uplink subframe;
a second determining module, configured to determine whether a change rule of the interference power is the same as a change rule of a power pattern of a reference signal of a downlink subframe of the wireless network cell;
a third determining module, configured to determine that the wireless network cell is a GPS out-of-step cell when it is determined that a change rule of the interference power is the same as a change rule of the power pattern of the reference signal;
wherein the first determining module is specifically configured to:
acquiring M interference powers of M symbols of each uplink subframe in N uplink subframes in the wireless network cell within preset frequency domain scheduling time; wherein M, N is a positive integer;
determining an average interference power of each of the M symbols in the N uplink subframes;
determining a change rule of the interference power of the uplink subframe of the wireless network cell based on the average interference power of each symbol in the N uplink subframes;
wherein the first determining module is specifically configured to:
determining K target interference powers from the M average interference powers; the K target interference powers are the front K bits of the M average interference powers which are arranged from large to small; wherein K is a positive integer less than M;
calculating the average value of M-K average interference powers except the K target interference powers in the M average interference powers;
obtaining the ratio of each target interference power in the K target interference powers to the average value to obtain K ratios;
determining P ratios of which the ratios are greater than or equal to a first preset threshold value from the K ratios; wherein P is a positive integer less than or equal to K;
when P is larger than or equal to a second preset threshold value, determining P symbols corresponding to the P ratios;
and obtaining a change rule of the interference power according to a difference set, wherein the difference set comprises the difference of every two symbol indexes in the P symbol indexes of the P symbols.
5. The apparatus of claim 4, wherein the second determining module is specifically configured to:
obtaining Q symbol indexes of Q symbols with power values larger than a preset power value in the power pattern of the reference signal; wherein Q is a positive integer;
obtaining a change rule of the power pattern of the reference signal according to a target difference value set, wherein the target difference value set comprises a difference value of every two symbol indexes in Q symbol indexes of the Q symbols;
determining whether the set of difference values is a subset of a target set;
when the difference value set is a subset of the target set, determining that the change rule of the interference power is the same as the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell; otherwise, determining that the change rule of the interference power is different from the change rule of the power pattern of the reference signal of the downlink subframe of the wireless network cell.
6. The apparatus of claim 4 or 5, wherein the apparatus further comprises:
and the sending module is used for reporting the wireless network cell to the management equipment of the wireless communication system.
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