CN109661027B - Method and device for determining working state of network equipment - Google Patents
Method and device for determining working state of network equipment Download PDFInfo
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- CN109661027B CN109661027B CN201710936836.6A CN201710936836A CN109661027B CN 109661027 B CN109661027 B CN 109661027B CN 201710936836 A CN201710936836 A CN 201710936836A CN 109661027 B CN109661027 B CN 109661027B
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Abstract
The invention discloses a method and a device for determining the working state of network equipment, wherein the method comprises the following steps: recording at least one parameter value of a system clock of the network equipment in a preset time period before the current moment; the current moment is the moment when the network equipment enters a GPS unlocking state; estimating the working stability of the system clock at the current moment based on the at least one parameter value; estimating the time length of the network equipment in a normal working state after the current moment according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for determining a working state of a network device.
Background
A base station may cause a Global Positioning System (GPS) lock loss in an external field due to various complicated situations. When the GPS is out of lock, the base station enters a hold (hold over) state, i.e., the system clock of the base station cannot be continuously calibrated by using the GPS as a reference clock. The base station cannot keep running without a reference clock for a long time, but can keep a normal working state within a period of time, so that maintenance personnel can maintain the base station within the period of time.
Generally, when there are a plurality of base stations in a certain area which are affected by losing the lock of the GPS signal and the GPS is lost, the maintenance personnel will maintain the plurality of base stations at random. Because each base station can maintain different working time lengths after the GPS is unlocked, and some base stations have different working lengths, the situation that the condition of a communication network is influenced because the adjacent base stations are greatly interfered because the uplink and the downlink of a time domain are asynchronous with the surrounding base stations due to the lack of a reference clock of partial unretained base stations is avoided.
Therefore, if the time length that each base station can maintain normal operation after the GPS is unlocked can be determined, and then the maintenance sequence is determined according to the time length, for example, the maintenance is performed before the time length is shorter, and the maintenance is performed after the time length is longer, so that the influence of the base station on the communication network during the GPS unlocking period is reduced to the minimum.
Therefore, how to determine the duration of the base station maintaining the stable working state after the GPS is out of lock is an urgent technical problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining a working state of network equipment, which are used for solving the technical problem of how to determine the duration of a base station maintaining a stable working state after a GPS is unlocked.
The first aspect of the present invention provides a method for determining a working state of a network device, where the method includes:
recording at least one parameter value of a system clock of the network equipment in a preset time period before the current moment; the current time is the time when the network equipment enters a GPS out-of-lock state, each parameter value in the at least one parameter value is a phase difference value of a clock signal generated by the system clock and a reference signal at a preset sampling time, and/or each parameter value is a frequency deviation value of the clock signal generated by the system clock and the reference signal at the preset sampling time;
estimating the working stability of the system clock at the current moment based on the at least one parameter value;
estimating the time length of the network equipment in a normal working state after the current moment according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
In a possible embodiment, the estimating, based on the at least one parameter value, an operating stability of the system clock at the current time includes:
based on the at least one parameter value, standardizing the parameter value of the system clock at the current moment to obtain the standardized parameter value of the system clock at the current moment;
acquiring a standard deviation of the at least one parameter value;
and determining the product of the standardized parameter and the standard deviation as the working stability of the system clock at the current moment.
In a possible embodiment, the estimating, based on the at least one parameter value, an operating stability of the system clock at the current time includes:
determining whether the number of the at least one parameter value is less than a preset threshold;
if so, determining that the working stability of the system clock at the current moment is the most unstable degree in the multiple working stabilities contained in the preset mapping relation; and the system clock corresponding to the most unstable degree can maintain the normal working state after being in the GPS unlocking state for the minimum time.
In a possible embodiment, when the at least one parameter value is at least one frequency offset value, the normalizing the parameter value of the system clock at the current time based on the at least one parameter value to obtain the normalized parameter value of the system clock at the current time includes:
determining a maximum value of the at least one frequency offset value;
and acquiring the ratio of the frequency deviation value of the system clock at the current moment to the maximum value, namely the standardized parameter value of the system clock at the current moment.
In a possible embodiment, when the at least one parameter value is at least one frequency offset value, the obtaining a standard deviation of the at least one parameter value includes:
determining a change rule of the at least one frequency offset value obeying a normal distribution function in the preset time period;
and acquiring the standard deviation of the frequency deviation value accumulated to the current moment based on the standard deviation calculation formula of the normal distribution function and the at least one frequency deviation value.
A second aspect of the present invention provides a device for determining an operating status of a network device, including:
the recording module is used for recording at least one parameter value of a system clock of the network equipment in a preset time period before the current moment; the current time is the time when the network equipment enters a GPS out-of-lock state, each parameter value in the at least one parameter value is a phase difference value of a clock signal generated by the system clock and a reference signal at a preset sampling time, and/or each parameter value is a frequency deviation value of the clock signal generated by the system clock and the reference signal at the preset sampling time;
the working stability estimation module is used for estimating the working stability of the system clock at the current moment based on the at least one parameter value;
the working duration estimation module is used for estimating the duration of the network equipment in a normal working state after the current moment according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
In a possible implementation, the operation stability estimation module is specifically configured to:
based on the at least one parameter value, standardizing the parameter value of the system clock at the current moment to obtain the standardized parameter value of the system clock at the current moment;
acquiring a standard deviation of the at least one parameter value;
and determining the product of the standardized parameter and the standard deviation as the working stability of the system clock at the current moment.
In a possible implementation, the operation stability estimation module is specifically configured to:
determining whether the number of the at least one parameter value is less than a preset threshold;
if so, determining that the working stability of the system clock at the current moment is the most unstable degree in the multiple working stabilities contained in the preset mapping relation; and the system clock corresponding to the most unstable degree can maintain the normal working state after being in the GPS unlocking state for the minimum time.
In a possible implementation manner, when the at least one parameter value is at least one frequency offset value, the operation stability estimation module is specifically configured to:
determining a maximum value of the at least one frequency offset value;
and acquiring the ratio of the frequency deviation value of the system clock at the current moment to the maximum value, namely the standardized parameter value of the system clock at the current moment.
In a possible implementation manner, when the at least one parameter value is at least one frequency offset value, the operation stability estimation module is specifically configured to:
determining a change rule of the at least one frequency offset value obeying a normal distribution function in the preset time period;
and acquiring the standard deviation of the frequency deviation value accumulated to the current moment based on the standard deviation calculation formula of the normal distribution function and the at least one frequency deviation value.
The third aspect of the present invention provides a network device operating status determining apparatus, which includes a processor, a memory and a transceiver, wherein 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 procedures according to the program:
the processor records at least one parameter value of a system clock of the network equipment in a preset time period before the current moment; the current time is the time when the network equipment enters a GPS out-of-lock state, each parameter value in the at least one parameter value is a phase difference value of a clock signal generated by the system clock and a reference signal at a preset sampling time, and/or each parameter value is a frequency deviation value of the clock signal generated by the system clock and the reference signal at the preset sampling time;
the processor estimates the working stability of the system clock at the current moment based on the at least one parameter value;
the processor estimates the time length of the network equipment in a normal working state after the current moment according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
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 parameter information of the network equipment in the normal working state before the GPS is unlocked is recorded, the index for feeding back the working state of the system clock of the network equipment is given, the working stable state of the system clock at any moment is quantized according to the recorded parameter information, and finally the sustainable stable working time of the network equipment after the reference clock is lost at a certain moment is estimated according to the mapping relation between the pre-stored working stable state and the normal working time after the GPS is unlocked, so that the method for estimating the time of the base station maintaining the stable working state after the GPS is unlocked is given on the premise of basically not changing the original hardware design.
Drawings
FIG. 1 is a schematic diagram illustrating clock synchronization achieved by calibrating a vibration frequency of a crystal oscillator using a GPS as a reference clock in the prior art;
fig. 2 is a flowchart of a method for determining a working state of a network device according to an embodiment of the present invention;
FIG. 3 is a diagram of a set of sample data of frequency offset values according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating normalized offset values corresponding to the sample data shown in FIG. 3 according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating an embodiment of estimating a standard deviation of a frequency offset value corresponding to the TD base station entering a GPS out-of-lock state at each time within the preset time period according to the sample data shown in fig. 3;
fig. 6 is a schematic diagram of the operating stability of the TD base station entering the GPS out-of-lock state at each time within the preset time period according to the data in fig. 4 and 5 in the embodiment of the present invention;
fig. 7 is a schematic block diagram of an apparatus for determining an operating state of a network device according to an embodiment of the present invention;
fig. 8 is a structural diagram of an apparatus for determining an operating state of a network device according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method and a device for determining a working state of network equipment, which are used for solving the technical problem of how to determine the duration of a base station maintaining a stable working state after a GPS is unlocked.
In order to solve the above technical problems, the general idea of the embodiment of the present invention is as follows:
a method for determining the working state of network equipment comprises the following steps:
recording at least one parameter value of a system clock of the network equipment in a preset time period before the current moment; the current time is the time when the network equipment enters a GPS out-of-lock state, each parameter value in the at least one parameter value is a phase difference value of a clock signal generated by the system clock and a reference signal at a preset sampling time, and/or each parameter value is a frequency deviation value of the clock signal generated by the system clock and the reference signal at the preset sampling time;
estimating the working stability of the system clock at the current moment based on the at least one parameter value;
estimating the time length of the network equipment in a normal working state after the current moment according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
In the technical scheme, the parameter information of the network equipment in the normal working state before the GPS is unlocked is recorded, the index for feeding back the working state of the system clock of the network equipment is given, the working stable state of the system clock at any moment is quantized according to the recorded parameter information, and finally the sustainable stable working time of the network equipment after the reference clock is lost at a certain moment is estimated according to the mapping relation between the pre-stored working stable state and the normal working time after the GPS is unlocked, so that the method for estimating the time for the network equipment to maintain the stable working state after the GPS is unlocked is given on the premise of basically not changing the original hardware design.
In order to better understand the technical solutions, the technical solutions of the present invention are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and the embodiments of the present invention are 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 in the embodiments of the present invention may be combined with each other without conflict.
In the embodiment of the present invention, the network device may be any base station product, for example, a Time Division (TD) base station, for example, a Time Division-Synchronous code Division Multiple Access (TD-SCDMA) base station or a Time Division long term Evolution (TD-LTE) base station; the system can be a radio frequency remote station, a repeater station or an indoor distribution system and the like. Of course, other network devices that require clock synchronization may also be used, and the embodiments of the present invention are not limited thereto. In the following description, the network device will be exemplified as a TD base station.
First, a clock synchronization process of the TD base station is described.
In the existing TD base station, a technology that is generally adopted is to calibrate the vibration frequency of a crystal oscillator by using a GPS as a reference clock to achieve clock synchronization.
As shown in fig. 1, the specific implementation is as follows: the voltage controlled crystal oscillator provides a signal, which is divided into a signal f1 and a signal f2 after passing through a frequency divider. Wherein, the signal f1 is output to a Complex Programmable Logic Device (CPLD) as a system clock; the signal f2 is used for phase comparison with the GPS signal, so as to ensure that the phase difference between the f2 signal and the GPS signal is not changed. If there is a change in the phase difference, the crystal oscillator is controlled by adjusting the voltage until the phase difference remains unchanged, thereby achieving the purpose of calibrating the system clock.
In the clock synchronization process, the TD base station records the phase difference between the f2 signal and the GPS signal, the voltage control value for adjusting the voltage, and other related data, so the time length for the TD base station to maintain a stable operating state after the GPS is out of lock is estimated according to the related data recorded in the clock synchronization process of the TD base station.
Next, the method in the embodiment of the present invention will be described in detail.
Referring to fig. 2, a flowchart of a method for determining a working state of a network device according to an embodiment of the present invention is shown, where the method includes:
step 201: recording at least one parameter value of a system clock of the network equipment in a preset time period before the current moment; and the current moment is the moment when the network equipment enters a GPS unlocking state.
In an embodiment of the present invention, each of the at least one parameter value is a phase difference value between a clock signal generated by the system clock and a reference signal at a preset sampling time, and/or each parameter value is a frequency offset value between the clock signal generated by the system clock and the reference signal at the preset sampling time.
In a specific implementation process, when the TD base station performs clock synchronization, the phase detector is used to compare parameter values, such as a phase difference, a frequency offset value, and the like, of the clock signal and the GPS signal, and then the parameter compared by the phase detector can be recorded. For example, for each preset interval, the corresponding parameter value is recorded.
Specifically, a method of recording parameters is proposed as a constant value recording method, that is, the number n of parameters to be recorded is specified in advance, for example, n > 2000. And when the number of the recorded parameters is larger than n, clearing the initial part of parameters, continuously recording the parameter values corresponding to the time closest to the current time, and keeping the number of the recorded parameters to be n all the time. When the TD base station can not obtain the current GPS signal, determining that the GPS is unlocked at the current moment, and stopping recording the parameters and keeping a plurality of originally recorded parameter values at the moment. It should be noted that, at this time, the number of the plurality of parameter values recorded by the TD base station may be less than n, or may be equal to n. When the crystal oscillator is powered on again, the original parameter value is erased and recorded again.
After performing the completion step 201, the method in the embodiment of the present invention performs step 202, that is: and estimating the working stability of the system clock at the current moment based on the at least one parameter value.
In the embodiment of the present invention, the step 202 may have two specific implementation manners as follows:
first, step 202 comprises:
based on the at least one parameter value, standardizing the parameter value of the system clock at the current moment to obtain the standardized parameter value of the system clock at the current moment;
acquiring a standard deviation of the at least one parameter value;
and determining the product of the standardized parameter and the standard deviation as the working stability of the system clock at the current moment.
In the embodiment of the present invention, the stability of the crystal oscillator at a certain time is defined by two factors: 1) the larger the standardized parameter value is, the larger the difference between the actual working frequency of the crystal oscillator and the reference value is, the larger the uncertainty factor is; 2) the crystal oscillator is subjected to cumulative effects of phase shift states and/or frequency shift states over the period of time, e.g., acquiring standard deviations of the recorded parameters over the period of time. For example, the frequency offset value in fig. 3 is sample data, and when the X-axis is 502, the absolute value of the frequency offset value is 0, but since the crystal oscillator is just powered on, it is actually still in an unstable state, and therefore, the cumulative effect in a time period needs to be counted. And finally, acquiring the accumulated influence of the phase offset state or the frequency offset state, namely the product of the standard deviation and the standardized parameter value, namely the working stability of the crystal oscillator representing the system clock at the moment.
In the implementation process, the phase difference of the crystal oscillator, or the frequency offset value, or a combination of the two may be used to estimate the operation stability, and the corresponding principles of the different parameters are the same, so in the following description, the operation stability estimation using the frequency offset value will be taken as an example for explanation.
Definition of StaOCNormalizing frequency offset value f to represent the working stability of a crystal oscillator of a system clock at time tEIn order to standardize the values of the parameters,Asta is the cumulative effect of the overall frequency offset state of the crystal oscillator during the periodOCThe calculation method of (2) satisfies:
StaOC＝fE×A
next, the first mode will be described in detail.
In this embodiment of the present invention, when the at least one parameter value is at least one frequency offset value, the normalizing the parameter value of the system clock at the current time based on the at least one parameter value to obtain the normalized parameter value of the system clock at the current time includes:
determining a maximum value of the at least one frequency offset value;
and acquiring the ratio of the frequency deviation value of the system clock at the current moment to the maximum value, namely the standardized parameter value of the system clock at the current moment.
In the specific implementation process, the frequency deviation value f is normalizedEThe calculation method of (2) satisfies the following condition:
wherein f istIs the original frequency offset value recorded at time t, max { fiOf n data recordedThe absolute value is the largest. The normalized frequency offset values after processing of the sample data shown in fig. 3 are shown in fig. 4.
In this embodiment of the present invention, when the at least one parameter value is at least one frequency offset value, the obtaining a standard deviation of the at least one parameter value includes:
determining a change rule of the at least one frequency offset value obeying a normal distribution function in the preset time period;
and acquiring the standard deviation of the frequency deviation value accumulated to the current moment based on the standard deviation calculation formula of the normal distribution function and the at least one frequency deviation value.
In a specific implementation process, the n frequency offset values recorded within the preset time are made to obey normal distribution, for each t, the frequency of the previous frequency offset is large, and the standard deviation of the normal distribution is large. Taking the example that the TD base station enters the GPS out-of-lock state at the current time as an example, at this time, n frequency deviation values recorded in the TD base station are parameter values of the base station in a preset time period before entering the GPS out-of-lock state, and then according to a standard deviation calculation formula of a normal distribution function, in combination with the n frequency deviation values recorded in the preset time, a standard deviation of the frequency deviation value accumulated to the current time by the TD base station is calculated. Since the standard deviation calculation method of the normal distribution is common knowledge, it is not described herein again.
According to the sample data shown in fig. 3, the standard deviation of the frequency offset value corresponding to the TD base station entering the GPS out-of-lock state at each time within the preset time period is estimated, as shown in fig. 5. For the first 500 parameter values, the standard deviation of the frequency offset value is larger; after 500 parameter values, it can be seen remarkably that the standard deviation of the frequency offset value gradually decreases and tends to be stable.
Finally, the normalized frequency offset value f is calculatedEAnd standard deviation of frequency offset valueAAnd multiplying to obtain the working stability of the TD base station. Multiplying the data shown in fig. 4 and 5 to obtain each time of the TD base station within the predetermined time periodThe working stability corresponding to the GPS out-of-lock state is shown in fig. 6. For example, taking the TD base station entering the GPS out-of-lock state at the current time as an example, the ordinate corresponding to the last time shown in fig. 6 is 2.585.
In a second manner, step 202 includes:
determining whether the number of the at least one parameter value is less than a preset threshold;
if so, determining that the working stability of the system clock at the current moment is the most unstable degree in the multiple working stabilities contained in the preset mapping relation; and the system clock corresponding to the most unstable degree can maintain the normal working state after being in the GPS unlocking state for the minimum time.
In a specific implementation process, the TD base station sets the number of parameter values to be recorded in advance, and then after the GPS is unlocked, the TD base station determines that the number of the recorded parameter values is much smaller than a preset threshold, for example, the number of the recorded parameter values is 1/4 of the preset threshold n, which indicates that the TD base station is not locked by the GPS shortly after being started, and then the TD base station is considered to be in an extremely unstable state.
Of course, one skilled in the art can also combine the second mode with the first mode. For example, it may be determined whether the number of recorded parameter values is smaller than a preset threshold value according to the second manner, and if so, it is directly determined that the operation stability of the base station is extremely unstable; if the threshold value is larger than the preset threshold value, the estimation is performed according to the first mode, which is not described herein again.
After performing the completion step 202, the method in the embodiment of the present invention performs step 203, that is: estimating the time length of the network equipment in a normal working state after the current moment according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
In a specific implementation process, the preset mapping relationship may be as shown in table 1. And storing the duration of the normal working state corresponding to the working stability degrees of various values in the mapping relation, and inquiring the mapping relation to estimate the duration of the normal working state which can be maintained by the TD base station after determining the working stability degree of the TD entering the GPS out-of-lock state at the current moment. For example, when it is determined that the operation stability degree is 2.585<2.75, it is estimated that the time period during which it can maintain the normal operation state is a.
TABLE 1
| Degree of stability of operation | Value range | Duration of normal operating condition (h) |
| Is more stable | StaOC≤2.75 | A |
| Instability of the film | 2.75＜StaOC≤3.5 | B |
| Is extremely unstable | StaOC＞3.5 | C |
In a specific implementation process, before step 201 to step 203, the mapping relationship shown in table 1 needs to be obtained and stored through multiple tests. The specific process is as follows:
1) performing tests in a laboratory, performing GPS locking disconnection operation in different working states of the crystal oscillator, and recording the time that a system clock of the TD base station can maintain a normal working state;
2) respectively calculating values of the working stability of disconnecting the GPS locking in different states by adopting the calculation method in the step 202;
3) and dividing the value of the working stability into different grades, and establishing a mapping relation between the working stability and the time of the system clock capable of maintaining a normal working state.
The method comprises the steps of recording parameter information of the network equipment in a normal working state before the GPS is unlocked, giving an index for feeding back the working state of a system clock of the network equipment, quantizing the working stable state of the system clock at any moment according to the recorded parameter information, and estimating the time of the network equipment which can continuously and stably work after the reference clock is lost at a certain moment according to the mapping relation between the prestored working stable state and the normal working time after the GPS is unlocked, so that the method for estimating the time of the network equipment which can maintain the stable working state after the GPS is unlocked is provided on the premise of basically not changing the original hardware design.
Furthermore, when a plurality of base stations are in the GPS unlocking condition in an external field, the method can effectively provide reference information, reasonably arrange a maintenance plan and reduce the influence of the GPS unlocking problem on the whole communication network.
A second aspect of the present invention provides a network device operating state determining apparatus, where the apparatus may be a base station or may be a component in a base station, and for example, may be a base station in a wireless communication system such as an LTE system and an NR system, such as a macro base station and a home base station, and may also be another base station or another device that needs to perform clock synchronization. Referring to fig. 7, a schematic structural diagram of a network device operating state determining apparatus according to an embodiment of the present invention is shown, where the apparatus includes:
a recording module 701, configured to record at least one parameter value of a system clock of a network device in a preset time period before a current time; the current time is the time when the network equipment enters a GPS out-of-lock state, each parameter value in the at least one parameter value is a phase difference value of a clock signal generated by the system clock and a reference signal at a preset sampling time, and/or each parameter value is a frequency deviation value of the clock signal generated by the system clock and the reference signal at the preset sampling time;
a working stability estimation module 702, configured to estimate a working stability of the system clock at the current time based on the at least one parameter value;
a working duration estimation module 703, configured to estimate, according to a preset mapping relationship, a duration that the network device is in a normal working state after the current time; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
Since the apparatus provided in the second aspect of the present invention is proposed under the same concept as the network device operating state determining method provided in the first aspect of the present invention, various variations and specific embodiments of the network device operating state determining method in the foregoing embodiments of fig. 2 to 6 are also applicable to the apparatus of this embodiment, and a person skilled in the art can clearly know implementation procedures of the apparatus in this embodiment through the foregoing detailed description of the network device operating state determining method, so that details are not described here for brevity of description.
A third aspect of the present invention provides a network device operating state determining apparatus, where the apparatus may be a base station or may be a component in a base station, for example, a base station in a wireless communication system such as an LTE system and an NR system, or may be another base station or another device that needs to perform clock synchronization. Referring to fig. 8, a schematic structural diagram of an apparatus for determining an operating state of a network device according to an embodiment of the present invention is shown, where the apparatus includes a processor 801, a memory 802, and a transceiver 803, where the transceiver 803 receives and transmits data under the control of the processor 801, the memory 802 stores a preset program, and the processor 801 reads the program in the memory, and executes the following processes according to the program:
the processor 801 records at least one parameter value of a system clock of the network device in a preset time period before the current time; the current time is the time when the network equipment enters a GPS out-of-lock state, each parameter value in the at least one parameter value is a phase difference value of a clock signal generated by the system clock and a reference signal at a preset sampling time, and/or each parameter value is a frequency deviation value of the clock signal generated by the system clock and the reference signal at the preset sampling time;
the processor 801 estimates the working stability of the system clock at the current moment based on the at least one parameter value;
the processor 801 estimates the duration of the network device in the normal working state after the current time according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
Optionally, the processor 801 may be a central processing unit (cpu), an Application Specific Integrated Circuit (ASIC), one or more Integrated circuits for controlling program execution, a hardware Circuit developed by using a Field Programmable Gate Array (FPGA), or a baseband processor.
Optionally, processor 801 may include at least one processing core.
Alternatively, the Memory 802 may include a Read Only Memory (ROM), a Random Access Memory (RAM), and a disk Memory. The memory is used for storing data required by the processor 801 during operation. The number of the memories is one or more.
Since the apparatus provided in the third aspect of the present invention is proposed under the same concept as the network device operating state determining method provided in the first aspect of the present invention, various variations and specific embodiments of the network device operating state determining method in the foregoing embodiments of fig. 2 to 6 are also applicable to the apparatus of this embodiment, and through the foregoing detailed description of the network device operating state determining method, a person skilled in the art can clearly know the implementation process of the apparatus in this embodiment, so for the brevity of the description, detailed description is not repeated here.
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 (10)
1. A method for determining the working state of network equipment is characterized by comprising the following steps:
recording at least one parameter value of a system clock of the network equipment in a preset time period before the current moment; determining that the GPS is out-of-lock at the current moment when the network device enters a GPS out-of-lock state, wherein each parameter value in the at least one parameter value is a phase difference value of a clock signal generated by the system clock and a reference signal at a preset sampling moment, and/or each parameter value is a frequency deviation value of the clock signal generated by the system clock and the reference signal at the preset sampling moment;
estimating the working stability of the system clock at the current moment based on the at least one parameter value;
estimating the time length of the network equipment in a normal working state after the current moment according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
2. The method of claim 1, wherein estimating the operational stability of the system clock at the current time based on the at least one parameter value comprises:
based on the at least one parameter value, normalizing the parameter value of the system clock at the current moment to obtain a normalized parameter value of the system clock at the current moment, wherein the normalizing is to obtain a ratio of each parameter value to a maximum value of the at least one parameter value;
acquiring a standard deviation of the at least one parameter value;
and determining the product of the standardized parameter and the standard deviation as the working stability of the system clock at the current moment.
3. The method of claim 1, wherein estimating the operational stability of the system clock at the current time based on the at least one parameter value comprises:
determining whether the number of the at least one parameter value is less than a preset threshold;
if so, determining that the working stability of the system clock at the current moment is the most unstable degree in the multiple working stabilities contained in the preset mapping relation; and the system clock corresponding to the most unstable degree can maintain the normal working state after being in the GPS unlocking state for the minimum time.
4. The method of claim 2, wherein when the at least one parameter value is at least one frequency offset value, the normalizing the parameter value of the system clock at the current time based on the at least one parameter value to obtain the normalized parameter value of the system clock at the current time comprises:
determining a maximum value of the at least one frequency offset value;
and acquiring the ratio of the frequency deviation value of the system clock at the current moment to the maximum value, namely the standardized parameter value of the system clock at the current moment.
5. The method of claim 2, wherein the obtaining the standard deviation of the at least one parameter value when the at least one parameter value is at least one frequency offset value comprises:
determining a change rule of the at least one frequency offset value obeying a normal distribution function in the preset time period;
and acquiring the standard deviation of the frequency deviation value accumulated to the current moment based on the standard deviation calculation formula of the normal distribution function and the at least one frequency deviation value.
6. An apparatus for determining an operating status of a network device, comprising:
the recording module is used for recording at least one parameter value of a system clock of the network equipment in a preset time period before the current moment; determining that the GPS is out-of-lock at the current moment when the network device enters a GPS out-of-lock state, wherein each parameter value in the at least one parameter value is a phase difference value of a clock signal generated by the system clock and a reference signal at a preset sampling moment, and/or each parameter value is a frequency deviation value of the clock signal generated by the system clock and the reference signal at the preset sampling moment;
the working stability estimation module is used for estimating the working stability of the system clock at the current moment based on the at least one parameter value;
the working duration estimation module is used for estimating the duration of the network equipment in a normal working state after the current moment according to a preset mapping relation; the preset mapping relation is a relation between the working stability and the duration of the system clock which can maintain the normal working state after being in the GPS unlocking state.
7. The apparatus of claim 6, wherein the operational stability estimation module is specifically configured to:
based on the at least one parameter value, normalizing the parameter value of the system clock at the current moment to obtain a normalized parameter value of the system clock at the current moment, wherein the normalizing is to obtain a ratio of each parameter value to a maximum value of the at least one parameter value;
acquiring a standard deviation of the at least one parameter value;
and determining the product of the standardized parameter and the standard deviation as the working stability of the system clock at the current moment.
8. The apparatus of claim 6, wherein the operational stability estimation module is specifically configured to:
determining whether the number of the at least one parameter value is less than a preset threshold;
if so, determining that the working stability of the system clock at the current moment is the most unstable degree in the multiple working stabilities contained in the preset mapping relation; and the system clock corresponding to the most unstable degree can maintain the normal working state after being in the GPS unlocking state for the minimum time.
9. The apparatus as claimed in claim 7, wherein when the at least one parameter value is at least one frequency offset value, the operation stability estimation module is specifically configured to:
determining a maximum value of the at least one frequency offset value;
and acquiring the ratio of the frequency deviation value of the system clock at the current moment to the maximum value, namely the standardized parameter value of the system clock at the current moment.
10. The apparatus as claimed in claim 7, wherein when the at least one parameter value is at least one frequency offset value, the operation stability estimation module is specifically configured to:
determining a change rule of the at least one frequency offset value obeying a normal distribution function in the preset time period;
and acquiring the standard deviation of the frequency deviation value accumulated to the current moment based on the standard deviation calculation formula of the normal distribution function and the at least one frequency deviation value.
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