CN116887365A - Reference source signal switching method and device, electronic equipment and storage medium - Google Patents
Reference source signal switching method and device, electronic equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
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Abstract
The invention discloses a reference source signal switching method, a reference source signal switching device, electronic equipment and a storage medium. The reference source signal switching method comprises the following steps: acquiring a first reference source signal and a second reference source signal in the surrounding environment; determining the downlink signal quality of each second reference source signal, and determining a target second reference source signal according to the downlink signal quality; and when the first reference source signal does not exist in the surrounding environment, switching the target second reference source signal to serve as a synchronous reference source signal of a base station. According to the embodiment of the invention, the switching target second reference source signal is used as the synchronous reference source signal of the base station under the condition that the first reference source signal does not exist, the clock and frequency synchronization of the local base station is maintained, the current accessed service is ensured not to be interrupted, and the use experience of a user is improved.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a reference source signal switching method, a reference source signal switching device, an electronic device, and a storage medium.
Background
Existing base stations are all fixedly installed, and reference source signals are usually defined at the beginning of network deployment. The outdoor base station can adopt GPS/Beidou, the indoor base station can adopt IEEE1588 or air interface synchronization, and adjustment is basically not carried out once the source signal is explicitly referenced. Even if the reference source signal is lost due to faults, the method is based on the holding function of the local reference crystal oscillator; or in the case of multiple reference source signals, the handover reference source signal typically re-establishes the cell, resulting in a current service outage.
For a mobile base station which is temporarily opened in a short time and continuously used in movement, because the base station is in a moving state, a deterministic reference source mode of a traditional base station cannot be adopted, reference source signals of the base stations such as GPS, beidou signals, public network multi-system air interface signals and the like need to be rapidly identified and switched according to the environment of the base station, clock and frequency synchronization of a local base station is maintained in various environments, and the current accessed service is ensured not to be interrupted. Therefore, how to identify and switch the reference source signal to keep the base station service from being interrupted is a current urgent problem to be solved.
Disclosure of Invention
The invention provides a reference source signal switching method, a reference source signal switching device, electronic equipment and a storage medium, so as to realize timely switching of reference signal sources and prevent service interruption of a base station.
According to an aspect of the present invention, there is provided a reference source signal switching method, including:
acquiring a first reference source signal and a second reference source signal in the surrounding environment;
determining the downlink signal quality of each second reference source signal, and determining a target second reference source signal according to the downlink signal quality;
when the first reference source signal is not present in the surrounding environment, the handover target second reference source signal is used as a synchronous reference source signal of the base station.
According to another aspect of the present invention, there is provided a reference source signal switching apparatus, comprising:
the reference source acquisition module is used for acquiring a first reference source signal and a second reference source signal in the surrounding environment;
the signal quality determining module is used for determining the downlink signal quality of each second reference source signal and determining a target second reference source signal according to the downlink signal quality;
and the reference source switching module is used for switching the target second reference source signal to serve as the synchronous reference source signal of the base station when the first reference source signal does not exist in the surrounding environment.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform a reference source signal switching method of any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to implement a reference source signal switching method of any one of the embodiments of the present invention when executed.
According to the technical scheme, the downlink signal quality of each second reference source signal is determined by acquiring the first reference source signal and the second reference source signal in the surrounding environment, the target second reference source signal is determined according to the downlink signal quality, when the first reference source signal does not exist in the surrounding environment, the target second reference source signal is switched to serve as the synchronous reference source signal of the base station, the situation that the first reference source signal does not exist is achieved, the target second reference source signal is switched to serve as the synchronous reference source signal of the base station, clock and frequency synchronization of a local base station is maintained, the fact that the currently accessed service is not interrupted is guaranteed, and the use experience of a user is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a reference source signal switching method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a reference source signal switching method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a reference source signal switching system according to a third embodiment of the present invention;
fig. 4 is a schematic diagram of synchronous reference source signal switching according to a third embodiment of the present invention;
fig. 5 is a flowchart of a reference source signal switching method according to a third embodiment of the present invention;
Fig. 6 is a schematic structural diagram of a reference source signal switching device according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device implementing a reference source signal switching method according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a reference source signal switching method according to a first embodiment of the present invention, where the method may be performed by a reference source signal switching device, and the reference source signal switching device may be implemented in hardware and/or software, and the reference source signal switching device may be configured in an electronic device. As shown in fig. 1, the method includes:
s110, acquiring a first reference source signal and a second reference source signal in the surrounding environment.
The first reference source signal refers to a reference source signal with the highest priority, and it may be understood that when the first reference source signal exists in the surrounding environment, the first reference source signal may be used as a synchronous reference source signal of the base station. In an embodiment, the first reference source signal may include, but is not limited to, a global positioning system (Global Positioning System, GPS) synchronization signal.
The second reference source signal refers to a signal that is a synchronous reference source signal of the base station when the first reference source signal is not present in the surrounding environment. That is, when the first reference source signal is not present in the surrounding environment, the second reference source signal may be used as a synchronization reference source signal of the base station. The second reference source signal may have a priority over the first reference source signal, and in one embodiment, the second reference source signal may include, but is not limited to, a public network signal.
In an embodiment of the invention, the first reference source signal and the second reference source signal in the surrounding environment may be received via an antenna. Since the first reference source signal and the second reference source signal may be different kinds of signals, they may be acquired by different kinds of antennas, respectively. In an embodiment, when the first reference source signal is a GPS synchronization signal, the first reference source signal may be received through a GPS antenna; when the second reference source signal is a public network signal, the second reference source signal can be received through a public network signal receiving antenna.
During actual operation, the first reference source signal and the second reference source signal may be received for a threshold time for determining the validity of the first reference source signal and the second reference source signal. Illustratively, a first reference source signal that may be pulsed (1Pulse Per Second,1pps) with a second time may be received for determining the validity of the first reference source signal and facilitating base station synchronization; the second reference source signal may be received for a threshold time for determining the validity of the first reference source signal, wherein the threshold time may be set according to user requirements, and exemplary, but not limited thereto, may include 1ms, 10ms, 20ms, etc.
S120, determining the downlink signal quality of each second reference source signal, and determining the target second reference source signal according to the downlink signal quality.
The quality of the downlink signal may refer to the quality of the downlink signal of the second reference source signal. In the actual operation process, the downlink signal quality is determined according to at least one of the public network signal field intensity and the signal-to-interference-and-noise ratio. The target second reference signal source can be understood as a synchronous reference signal source to be switched, and is the reference source signal with the best downlink signal quality in the second reference source signals.
In the embodiment of the invention, the downlink signal quality of each second reference source signal can be determined, and the second reference source signal with the best downlink signal quality is determined as the target second reference source signal. In the actual operation process, the public network signal field intensity and the signal-to-interference-and-noise ratio of the second reference source signal can be determined, and the downlink signal quality of the second reference source signal is determined according to the public network signal field intensity and the signal-to-interference-and-noise ratio.
In an embodiment, when the second reference source signals are located in the same public network signal cell, the downlink signal quality may be determined according to the public network signal field strength, and the second reference source signal with the highest public network signal field strength may be determined as the target second reference source signal. When the second reference source signals are not located in the same public network signal cell, the downlink signal quality can be determined by combining the public network signal field intensity and the signal-to-interference-and-noise ratio due to signal interference among the public network signal cells. And determining a second reference source signal with higher combination of the public network signal field strength and the signal-to-interference-and-noise ratio as a target second reference source signal.
And S130, when the first reference source signal does not exist in the surrounding environment, the second reference source signal of the switching target is used as the synchronous reference source signal of the base station.
The synchronous reference signal source is a reference source for keeping the clock frequency of the base station synchronous, and when the environment of the base station changes, the synchronous reference signal source can switch the reference signal along with the signal existing in the surrounding environment.
In the embodiment of the invention, when the first reference source signal does not exist in the surrounding environment, the target second reference source signal can be switched to serve as the synchronous reference source signal of the base station. In the actual operation process, a radio access system, a public network signal frequency point and a public network signal cell of the target second reference source can be determined, and the target second reference source signal is switched to serve as a synchronous reference source signal of the base station according to the radio access system, the public network signal frequency point and the public network signal cell.
According to the embodiment of the invention, the downlink signal quality of each second reference source signal is determined by acquiring the first reference source signal and the second reference source signal in the surrounding environment, the target second reference source signal is determined according to the downlink signal quality, when the first reference source signal does not exist in the surrounding environment, the target second reference source signal is switched to serve as the synchronous reference source signal of the base station, the situation that the target second reference source signal is switched to serve as the synchronous reference source signal of the base station under the condition that the first reference source signal does not exist is realized, the clock and frequency synchronization of a local base station is maintained, the current accessed service is ensured not to be interrupted, and the use experience of a user is improved.
In an embodiment, the reference source signal switching method further includes:
after the synchronous reference source signal is determined, storing the frequency corresponding to the synchronous reference source signal in the local reference crystal oscillator;
when the first reference source signal and the second reference source signal are not present in the surrounding environment, the local reference crystal oscillator is controlled to generate a second pulse signal according to frequency to serve as a synchronous reference source signal.
The local reference crystal oscillator can be used for providing a basic clock signal for the base station. Since the fundamental frequency and the radio frequency of the crystal oscillator generating the first reference source signal and the second reference source signal may be different from those of the local reference crystal oscillator, the synchronization can be maintained by adjusting the frequency.
In the embodiment of the invention, after the synchronous reference source signal is determined, the frequency corresponding to the synchronous reference source signal can be stored in the local reference crystal oscillator, and when the first reference source signal and the second reference source signal in the surrounding environment are not present, the local reference crystal oscillator can be controlled to generate a second pulse signal according to the frequency as the synchronous reference source signal so as to ensure the clock and the frequency synchronization of the base station.
In an embodiment, after switching the target second reference source signal, further comprising:
determining a phase offset difference of the target second reference source signal and the first reference source signal;
And performing phase compensation on the target second reference source signal according to the phase offset difference.
The phase offset difference may refer to a phase offset of the target second reference source signal relative to the first reference source signal. The phase offset difference may be determined when the second reference source signal is received from the first reference source signal.
In the embodiment of the invention, when the second reference source signal and the first reference source signal are acquired, the phase offset difference between the second reference source signal and the first reference source signal can be monitored. After switching the target second reference source signal, a phase offset difference between the target second reference source signal and the first reference source signal may be extracted, and the target second reference source signal may be phase compensated according to the phase offset difference.
In an embodiment, the reference source signal switching method further includes:
when the effective data of the second reference source signal in the threshold time is smaller than the preset threshold time, the phase of the second reference source signal is changed according to the difference value between the threshold time and the preset threshold time.
The valid data may refer to stable signal data within a threshold period of time. The preset threshold time length can be a preset time length, and can be set according to user requirements and threshold time.
In the embodiment of the invention, when the effective data existing in the second reference source signal in the threshold time is smaller than the preset threshold time, the jump of the phase of the second reference source signal in the switching process can be considered to be larger and the phase compensation is incomplete, the difference value between the threshold time and the preset threshold time can be determined, and the phase of the second reference source signal is received according to the difference value.
Example two
Fig. 2 is a flowchart of a reference source signal switching method according to a second embodiment of the present invention, which is further optimized and expanded based on the foregoing embodiment, and may be combined with each of the optional technical solutions in the foregoing embodiment. As shown in fig. 2, the method includes:
s210, receiving a first reference source signal according to a global positioning system antenna.
In an embodiment of the invention, the gps antenna may be an antenna for receiving gps synchronization signals. When the first reference source signal is a global positioning system synchronization signal, the first reference source signal may be received according to a global positioning system antenna.
S220, receiving a second reference source signal within a threshold time according to the public network signal receiving antenna.
The public network signal receiving antenna may be an antenna for receiving a public network signal. The threshold time may be set according to a user's demand, and exemplary, the threshold time may include 1ms, 10ms, 20ms, etc., which is not limited.
In the embodiment of the invention, when the second reference source signal is a public network signal, the second reference source signal within the threshold time can be received according to the public network signal receiving antenna. In one embodiment, to determine the continuity and validity of the second reference source signal, a frame header signal may be received for a threshold time.
S230, determining the public network signal field intensity and the signal-to-interference-and-noise ratio of the second reference source signal.
The public network signal field strength may refer to the signal strength of the public network. The signal-to-interference-and-noise ratio may refer to a ratio of the second reference source signal to a sum of the interference signal and the noise for measuring reliability of the communication quality.
In the actual operation process, the public network signal field intensity, the second reference source signal, the interference signal and the noise can be detected, and the signal-to-interference-and-noise ratio of the second reference source signal is determined according to the effective power of the second reference source signal, the interference signal and the noise.
And S240, when the second reference source signals are positioned in the same public network signal cell, determining the second reference source signal corresponding to the maximum value of the public network signal field intensity as a target second reference source signal.
In the embodiment of the invention, when the second reference source signals are located in the same public network signal cell, the maximum value of the field intensity of each public network signal can be determined, and the second reference source signal corresponding to the maximum value of the public network signal field intensity is used as the target second reference source signal.
S250, when each second reference source signal is located in at least two public network signal cells, determining a second reference source signal corresponding to the highest value of the downlink signal quality by combining the public network signal field intensity and the signal-to-interference-and-noise ratio as a target second reference source signal.
In the embodiment of the invention, when each second reference source signal is located in different public network signal cells, interference exists among the public network cells, the public network signal field intensity and the signal-to-interference-and-noise ratio are required to be comprehensively considered to determine the downlink signal quality, and in the actual operation process, the larger the value of the public network signal field intensity is, the better the downlink signal quality is; the larger the value of the signal-to-interference-plus-noise ratio is, the better the downlink signal quality is, and the second reference source signal corresponding to the highest value of the downlink signal quality can be determined as the target second reference source signal by combining the public network signal field intensity and the signal-to-interference-plus-noise ratio.
S260, extracting public network signal attribute information of the second reference source signal; wherein the public network signal attribute information comprises at least one of the following: radio access system, public network signal frequency point and public network signal cell.
The public network signal attribute information may refer to the public network signal property inherent to the second reference source signal. The public network signal attribute information may include, but is not limited to, a radio access system, a public network signal frequency point, and a public network signal cell. The radio access system may include, but is not limited to, global system for mobile communications (Global System for Mobile Communications, GSM), code division multiple access (Code Division Multiple Access, CNMD), wideband code division multiple access (Wideband Code Division Multiple Access, W-CDMA), and the like. The public network signal frequency point may refer to a frequency point value occupied by the second reference source signal, where public network signal frequency points corresponding to different radio access systems are different. The public network signal cell may refer to a signal cell in which the second reference signal source is located.
In the embodiment of the invention, after the second reference source signal is acquired, public network attribute information of the second reference source signal can be extracted, and a radio access system, a public network signal frequency point and a public network signal cell of the second reference source signal are determined.
S270, the second reference source signal of the public network signal cell switching target is used as the synchronous reference source signal of the base station according to the radio access system, the public network signal frequency point and the public network signal cell switching target.
In the embodiment of the invention, the radio access mode of the second reference source signal can be switched first, then the public network signal frequency point of the second reference source signal is determined, and finally the public network signal cell switching target second reference source signal is determined as the synchronous reference source signal of the base station.
According to the embodiment of the invention, the first reference source signal is received according to the global positioning system antenna, the public network signal field intensity and the signal to interference and noise ratio of the second reference source signal are determined according to the second reference source signal received by the public network signal receiving antenna within the threshold time, when the second reference source signals are positioned in the same public network signal cell, the second reference source signal corresponding to the maximum value of the public network signal field intensity is determined as the target second reference source signal, when the second reference source signals are positioned in at least two public network signal cells, the second reference source signal corresponding to the maximum value of the downlink signal quality is determined by combining the public network signal field intensity and the signal to interference and noise ratio as the target second reference source signal, the public network signal attribute information of the second reference source signal is extracted, and according to the synchronous reference source signals of the radio access mode, the public network signal frequency point and the public network signal cell switching target second reference source signal, the seamless switching of the reference source signal is realized, and the service of the base station which is accessed at present is ensured not to be interrupted.
Example III
Fig. 3 is a schematic structural diagram of a reference source signal switching system according to a third embodiment of the present invention, where, based on the above embodiment, a first reference source signal is taken as an example of a GPS synchronization signal, a second reference source signal is taken as an example of a public network signal, a threshold time is taken as an example of 10ms, and a specific embodiment of the reference source signal switching system for implementing reference source signal switching is shown in fig. 3, the reference source signal switching system includes: the system comprises a GPS receiving unit 31, a public network signal scanning unit 32, a public network downlink synchronization unit 33, a main control logic unit 34, a digital phase-locked loop unit 35, a local reference crystal oscillator 36 and a frequency storage unit 37.
The frequency storage unit 37 includes a pair of a digital filtering module 371 and a digital-to-analog converter 372.
The GPS receiving unit 31 is configured to receive the 1 ppsc GPS synchronization signal acquired by the GPS receiving antenna and a state of the GPS synchronization signal.
The public network signal scanning unit 32 is configured to receive a plurality of public network signal states acquired by the public network signal receiving antenna.
The public network downlink synchronization unit 33 is configured to determine a downlink signal field strength and a received signal quality of a 10ms public network signal, and determine validity, continuity and stability quality evaluation of the 10ms public network signal according to the downlink channel quality. Wherein the received channel quality may be determined by the signal-to-interference-and-noise ratio.
The master logic unit 34 is used for reference source signal validity detection. Specifically, the method comprises the steps of monitoring the validity, the continuity and the stability quality evaluation of the 1ppsGPS synchronous signal from the GPS receiving unit 31 and the 10ms public network signal of the public network downlink synchronous unit 33. Meanwhile, whether the public network signals have multi-system, multi-frequency point and multi-cell public network signals or not is monitored; monitoring the downlink signal field intensity and the received signal quality of the public network signals; while monitoring the relative phase offset between these public network signals with respect to the GPS synchronization signal or the current synchronization reference source signal.
The digital phase-locked loop unit 35 is used for transmitting the phase-locked tracking synchronous reference source signal.
The local reference crystal 36 is configured to control the local reference crystal to generate a second pulse signal as a synchronous reference source signal according to a frequency when the first reference source signal and the second reference source signal are not present in the surrounding environment.
The frequency storage unit 37 is configured to store a frequency corresponding to the synchronous reference source signal in the local reference crystal oscillator after determining the synchronous reference source signal.
In an embodiment, fig. 4 is a schematic diagram of a synchronous reference source signal switching according to a third embodiment of the present invention. According to the reference source signal validity detection of the main control logic unit 34, the synchronous reference signal source is switched in three situations of GPS synchronous signal, public network signal and local reference crystal oscillator Free Run mode.
When the public network signal is in a state of being used as a synchronous reference source signal, determining whether to switch the reference source signal between a system and a cell according to the field intensity and the received signal quality of the downlink signal of each public network cell.
In one embodiment, the acquisition of the synchronized reference source signal is resumed when the initialization or reference source is lost and then resumed.
In an embodiment, when the synchronous reference source signal is a public network signal, the stability of the instantaneous 10ms frame header signal is determined, and the instantaneous 10ms signal exceeding the quality evaluation threshold is shaped, so that the abnormal instantaneous signal is prevented from causing relatively large jump in precision. When the cell switching exists, whether the jump and compensation of the 10ms frame head signal in the phase caused by the cell switching before and after the cell switching accord with the quality evaluation threshold value is evaluated.
In one embodiment, depending on whether the reference source is a GPS synchronization signal, a public network signal, or a local crystal oscillator of Free Run, a 1pps signal may be regenerated for clock synchronization to the base station.
In an embodiment, fig. 5 is a flowchart of a reference source signal switching method according to a third embodiment of the present invention. In this embodiment, a method for switching reference source signals is specifically described by taking 10ms switching as an example of a synchronous reference source signal, taking a first reference source signal as a GPS synchronous signal, taking a second reference source signal as a public network signal, and taking a GPS synchronous signal and a public network signal as reference source signals. As shown in fig. 5, the method includes:
When the synchronous reference source signal is switched to be a public network signal, the current reference source signal can be determined to be none, the digital phase-locked loop mode is a tracking mode, and the tracking state is unlocked. And detecting a reference source signal in the surrounding environment, when the surrounding environment is Free of signals, determining that the current reference source signal is Free, the digital phase-locked loop mode is a tracking mode, the tracking state is unlocked, and the changing mode is a Free Run mode.
When signals exist in the surrounding environment, the digital phase-locked loop unit can be started according to the value of the built-in digital-to-analog converter, the reference source signal is determined to be in the tracking mode, the digital phase-locked loop mode is determined to be in the tracking mode, the tracking state is unlocked, and the digital phase-locked loop unit is locked. If the timer is overtime, i.e. the locking is not completed within the specified time, resetting the identification bit of the digital phase-locked loop locking to 0, resetting the digital phase-locked loop unit according to the configuration value, and locking again. If the reset flag bit is not locked within the preset times, the switching mode is Free Run mode. The preset times can include 4 times, 5 times and the like, and can be set according to the requirements of users. At this time, the reference source signal is available, the digital phase-locked loop mode is the hold mode, and the tracking state is unlocked. If the digital phase-locked loop unit finishes locking, at this time, the reference source signal is available, the digital phase-locked loop mode is a tracking mode, and the tracking state is locked.
The digital phase-locked loop unit tracks the reference source signal, locks the current DACO value when the reference source signal is lost, determines that the reference source signal is none at the moment, the digital phase-locked loop mode is a hold mode, tracks the reference source signal in an unlocked state, and locks again when the reference source signal exists. And if the signal is not available and the timer is overtime, resetting the digital phase-locked loop unit by using the last locked DACO value, and re-detecting the reference source signal in the surrounding environment.
In one embodiment, the master control logic unit is responsible for periodically monitoring whether the 1ppsGPS synchronization signal output by the GPS receiving unit and the 10ms public network signal output by the public network downlink synchronization unit are valid. The main control logic unit is responsible for periodically scanning frequency points, received signal field intensity and received signal quality of public network signals under each radio access system (RAT) of the public network. When the 1ppsGPS synchronizing signal and the 10ms public network signal are simultaneously valid, the 1ppsGPS synchronizing signal is selected as a synchronizing reference source signal.
When the master control logic unit detects that the 1ppsGPS synchronous signal is lost and the 10ms public network signal is still effective, the synchronous reference source is switched to the 10ms public network signal, and the phase deviation value of the 10ms public network signal relative to the 1ppsGPS synchronous signal is automatically compensated.
When the main control unit detects that the GPS synchronous signal 1pps is lost and the 10ms public network signal is invalid, the synchronous reference source is switched to carry out Free Run mode (the local reference crystal oscillator generates the synchronous reference source signal), and the tracking action of the digital phase-locked loop is stopped.
Under the condition that the 1ppsGPS synchronous signal and the 10ms public network signal are both effective, the main control logic unit is responsible for measuring the phase deviation of the 10ms public network signal of the current public network resident cell relative to the 1ppsGPS synchronous signal, and recording the corresponding relation of the current resident system, frequency point, cell and phase deviation value. And when the public network cell where the public network downlink synchronization unit resides is switched, repeating the operation and recording.
When the master control logic unit controls the synchronous reference source signal to be switched to the 10ms public network signal, the input state of the 1ppsGPS synchronous signal is periodically monitored, and when the GPS synchronous signal is recovered, the synchronous reference source signal is switched to the 1ppsGPS synchronous signal, and the phase is simultaneously aligned with the 1ppsGPS synchronous signal. Periodically monitoring the received signal field intensity and the received signal quality of a 10ms public network signal, and judging whether to switch a public network resident cell or not; periodically monitoring the received signal field intensity and the received signal quality of a 10ms public network signal, and triggering corresponding abnormal protection actions when the quality of the 10ms signal exceeds a preset threshold value; periodically monitoring the validity of a 10ms public network signal, switching a synchronous reference source to enter a Free Run mode when the signal is lost, and stopping the tracking action of the digital phase-locked loop; when the public network resident cell is switched, the phase compensation is automatically carried out according to the phase deviation of the 10ms public network signals of different cells relative to the GPS synchronous signals.
When the master control logic unit controls the reference source to switch to a Free Run mode, periodically monitoring the input state of the 1ppsGPS synchronizing signal, and when the 1ppsGPS synchronizing signal is recovered, switching the reference source to the 1ppsGPS synchronizing signal, wherein the phase is simultaneously aligned with the 1ppsGPS synchronizing signal; and periodically triggering a public network signal scanning action, when a resident public network cell is found, preferentially selecting a cell with the best receiving field intensity and receiving quality to carry out resident, and triggering a 10ms public network signal capturing action. When the 10ms public network signal is continuously captured, the reference source is switched to the 10ms frame header signal. And the main logic unit performs joint judgment on whether to control the downlink synchronization unit of the public network to perform the cell resident switching action according to the preset threshold value of the received signal field intensity and the received signal quality. Seamless switching, tracking, capturing and resumption of the synchronous reference source are realized, and the sustainability of the current service of the mobile base station under the mobile scene is ensured.
Example IV
Fig. 6 is a schematic structural diagram of a reference source signal switching device according to a fourth embodiment of the present invention. As shown in fig. 6, the apparatus includes: a reference source acquisition module 61, a signal quality determination module 62 and a reference source switching module 63.
The reference source acquisition module 61 is configured to acquire a first reference source signal and a second reference source signal in the surrounding environment.
The signal quality determining module 62 is configured to determine a downlink signal quality of each second reference source signal, and determine the target second reference source signal according to the downlink signal quality.
The reference source switching module 63 is configured to switch the target second reference source signal to be the synchronous reference source signal of the base station when the first reference source signal is not present in the surrounding environment.
According to the embodiment of the invention, the reference source acquisition module acquires the first reference source signal and the second reference source signal in the surrounding environment, the signal quality determination module determines the downlink signal quality of each second reference source signal, determines the target second reference source signal according to the downlink signal quality, and the reference source switching module switches the target second reference source signal to serve as the synchronous reference source signal of the base station when the first reference source signal does not exist in the surrounding environment, so that the situation that the first reference source signal does not exist is realized, the switch target second reference source signal serves as the synchronous reference source signal of the base station, the clock and the frequency synchronization of the local base station are maintained, the current accessed service is ensured not to be interrupted, and the use experience of a user is improved.
In an embodiment, the reference source signal switching device further includes:
the frequency storage module is used for storing the frequency corresponding to the synchronous reference source signal in the local reference crystal oscillator after the synchronous reference source signal is determined;
and the signal generation module is used for controlling the local reference crystal oscillator to generate a second pulse signal according to frequency to serve as a synchronous reference source signal when the first reference source signal and the second reference source signal are not present in the surrounding environment.
In one embodiment, the reference source acquisition module 61 comprises:
a first signal receiving unit for receiving a first reference source signal according to a global positioning system antenna;
and the second signal receiving unit is used for receiving a second reference source signal within a threshold time according to the public network signal receiving antenna.
In one embodiment, the signal quality determination module 62 includes:
the parameter determining module is used for determining the public network signal field intensity and the signal-to-interference-and-noise ratio of the second reference source signal;
the first target signal determining module is used for determining a second reference source signal corresponding to the maximum value of the public network signal field intensity as a target second reference source signal when each second reference source signal is positioned in the same public network signal cell;
and the second target signal determining module is used for determining a second reference source signal corresponding to the highest value of the downlink signal quality as a target second reference source signal by combining the public network signal field intensity and the signal-to-interference-and-noise ratio when each second reference source signal is positioned in at least two public network signal cells.
In one embodiment, the reference source switching module 63 includes:
the attribute information extraction unit is used for extracting public network signal attribute information of the second reference source signal; wherein the public network signal attribute information comprises at least one of the following: radio access system, public network signal frequency point and public network signal cell;
and the reference source switching unit is used for taking the second reference source signal of the public network signal cell switching target as the synchronous reference source signal of the base station according to the radio access system, the public network signal frequency point and the public network signal cell switching target.
In an embodiment, the reference source signal switching device further includes:
the offset difference determining module is used for determining the phase offset difference between the target second reference source signal and the first reference source signal;
and the phase compensation module is used for carrying out phase compensation on the target second reference source signal according to the phase offset difference.
In an embodiment, the reference source signal switching device further includes:
and the phase change module is used for changing the phase of the received second reference source signal according to the difference value between the threshold time and the preset threshold time when the effective data of the second reference source signal in the threshold time is smaller than the preset threshold time.
The reference source signal switching device provided by the embodiment of the invention can execute the reference source signal switching method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example five
Fig. 7 is a schematic structural diagram of an electronic device 10 implementing a reference source signal switching method according to an embodiment of the present invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 7, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as a reference source signal switching method.
In some embodiments, a reference source signal switching method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of one reference source signal switching method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform a reference source signal switching method in any other suitable way (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A reference source signal switching method, comprising:
acquiring a first reference source signal and a second reference source signal in the surrounding environment;
determining the downlink signal quality of each second reference source signal, and determining a target second reference source signal according to the downlink signal quality;
and when the first reference source signal does not exist in the surrounding environment, switching the target second reference source signal to serve as a synchronous reference source signal of a base station.
2. The method as recited in claim 1, further comprising:
after the synchronous reference source signal is determined, storing the frequency corresponding to the synchronous reference source signal in a local reference crystal oscillator;
and when the first reference source signal and the second reference source signal are not present in the surrounding environment, controlling the local reference crystal oscillator to generate a second pulse signal according to the frequency as the synchronous reference source signal.
3. The method of claim 1, wherein the acquiring the first reference source signal and the second reference source signal in the surrounding environment comprises:
receiving the first reference source signal according to a global positioning system antenna;
and receiving the second reference source signal within a threshold time according to a public network signal receiving antenna.
4. The method of claim 1 wherein said determining a downstream signal quality for each of said second reference source signals, determining a target second reference source signal in accordance with said downstream signal quality, comprises:
determining the public network signal field intensity and the signal-to-interference-and-noise ratio of the second reference source signal;
when each second reference source signal is located in the same public network signal cell, determining the second reference source signal corresponding to the maximum value of the public network signal field intensity as the target second reference source signal;
And when each second reference source signal is positioned in at least two public network signal cells, determining the second reference source signal corresponding to the highest value of the downlink signal quality as the target second reference source signal by combining the public network signal field intensity and the signal-to-interference-and-noise ratio.
5. The method of claim 1, wherein switching the target second reference source signal as the synchronous reference source signal for the base station when the first reference source signal is not present in the surrounding environment comprises:
extracting public network signal attribute information of the second reference source signal; wherein the public network signal attribute information comprises at least one of the following: radio access system, public network signal frequency point and public network signal cell;
and switching the target second reference source signal to serve as a synchronous reference source signal of the base station according to the radio access system, the public network signal frequency point and the public network signal cell.
6. The method of claim 1, further comprising, after switching the target second reference source signal:
determining a phase offset difference of the target second reference source signal and the first reference source signal;
And carrying out phase compensation on the target second reference source signal according to the phase offset difference.
7. The method as recited in claim 1, further comprising:
when the effective data existing in the second reference source signal in the threshold time is smaller than the preset threshold time, the phase of the second reference source signal is changed and received according to the difference value between the threshold time and the preset threshold time.
8. A reference source signal switching apparatus, comprising:
the reference source acquisition module is used for acquiring a first reference source signal and a second reference source signal in the surrounding environment;
the signal quality determining module is used for determining the downlink signal quality of each second reference source signal and determining a target second reference source signal according to the downlink signal quality;
and the reference source switching module is used for switching the target second reference source signal to serve as a synchronous reference source signal of the base station when the first reference source signal does not exist in the surrounding environment.
9. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the reference source signal switching method of any one of claims 1-7.
10. A computer readable storage medium storing computer instructions for causing a processor to implement the reference source signal switching method of any one of claims 1-7 when executed.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130272362A1 (en) * | 2012-04-11 | 2013-10-17 | Telefonaktiebolaget L M Ericsson (Publ) | Clock switching algorithm based on preferred clock source |
| CN115580298A (en) * | 2021-06-21 | 2023-01-06 | 深圳市中兴微电子技术有限公司 | Clock switching method and device, electronic equipment and readable storage medium |
| CN115987477A (en) * | 2022-12-19 | 2023-04-18 | 泰斗微电子科技有限公司 | Multi-reference source time synchronization method, system, module and medium |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130272362A1 (en) * | 2012-04-11 | 2013-10-17 | Telefonaktiebolaget L M Ericsson (Publ) | Clock switching algorithm based on preferred clock source |
| CN115580298A (en) * | 2021-06-21 | 2023-01-06 | 深圳市中兴微电子技术有限公司 | Clock switching method and device, electronic equipment and readable storage medium |
| CN115987477A (en) * | 2022-12-19 | 2023-04-18 | 泰斗微电子科技有限公司 | Multi-reference source time synchronization method, system, module and medium |
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