CN111278102B - Base station synchronization method, device, server and storage medium - Google Patents
Base station synchronization method, device, server and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a base station synchronization method, which comprises the following steps: switching the working frequency point to a first synchronous frequency point; receiving first synchronization data at the first synchronization frequency point; and performing first synchronization on the base station to be synchronized based on the first synchronization data after the first synchronization frequency point is switched to the working frequency point. A base station synchronization apparatus, a server, and a storage medium are also disclosed. The invention can ensure that the base station to be synchronized can carry out stable synchronization under the condition of weak working frequency point signals by switching the working frequency point to the synchronization frequency point.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication base stations, in particular to a base station synchronization method, a base station synchronization device, a base station synchronization server and a storage medium.
Background
The deployment of 4G LTE base stations is more and more intensive, and meanwhile, coverage areas between different base stations are overlapped and crossed parts, and base stations between different operators are also overlapped and crossed, so that TDD cells in the same frequency band in the same area need to acquire timing synchronization in order to avoid interference between different cells.
An air interface synchronization mode is mostly adopted for a micro base station, and an air interface synchronization technology is a technology for performing time synchronization by using signals of other base stations. The microminiature base station needs to select an optimal frequency point in order to ensure that the user can obtain maximum access during network optimization.
However, the optimal frequency point is not necessarily the frequency point with strong signal, the base station is synchronized at the air interface of the working frequency point, and the air interface synchronization cannot be normally performed when the beneficial signal is weak.
Disclosure of Invention
The invention provides a base station synchronization method, a base station synchronization device, a server and a storage medium, which are used for realizing that a base station can still stably realize synchronization under the condition of weak working frequency point signals, and in a first aspect, the embodiment of the invention provides a base station synchronization method, which comprises the following steps:
switching the working frequency point to a first synchronous frequency point;
receiving first synchronization data at the first synchronization frequency point;
and performing first synchronization on the base station to be synchronized based on the first synchronization data after the first synchronization frequency point is switched to the working frequency point.
Further, after the first synchronization is performed on the base station to be synchronized based on the first synchronization data after the first synchronization frequency point is switched to the working frequency point, the method further includes:
after a preset time interval, switching the working frequency point to a second synchronous frequency point for one time or multiple times;
receiving second synchronous data at the second synchronous frequency point each time;
and performing second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time.
Further, before switching the working frequency point to the first synchronous frequency point or before switching the working frequency point to the second synchronous frequency point, the method includes:
selecting a frequency point with the strongest signal from a plurality of selectable frequency points as the first synchronous frequency point or the second synchronous frequency point;
and switching from the working frequency point to the first synchronous frequency point or switching from the working frequency point to the second synchronous frequency point.
Further, the first synchronous frequency point and the second synchronous frequency point are the same frequency point or different frequency points.
Further, the accuracy of the first synchronization is lower than the accuracy of the second synchronization.
Further, the second synchronizing the base station based on the second synchronization data includes:
calculating the second synchronous data by using a preset algorithm to obtain an adjustment value;
and adjusting the clock of the base station to be synchronized based on the adjustment value so as to realize second synchronization between the clock of the base station to be synchronized and the clock of the reference base station.
Further, the data frame of the second synchronization data includes a first subframe, a second subframe and a third subframe, the first subframe is located at the head of the data frame, the second subframe is a subframe next to the first subframe, and the third subframe is located at the tail of the data frame;
after the preset time interval, switching the working frequency point to a second synchronous frequency point for one time or multiple times;
receiving second synchronous data at the second synchronous frequency point each time;
after each time of switching from the second synchronous frequency point to the working frequency point, performing second synchronization on the base station to be synchronized based on the second synchronous data comprises:
switching the working frequency point to the second synchronous frequency point in the time period of the first subframe;
receiving the second synchronous data in the second subframe at the second synchronous frequency point;
and performing second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time in the time period of the third subframe.
In a second aspect, the present invention provides a base station synchronization apparatus, including:
the first switching module is used for switching the working frequency point to a first synchronous frequency point;
a first receiving module, configured to receive first synchronization data at the first synchronization frequency point;
and the first synchronization module is used for performing first synchronization on the base station to be synchronized based on the first synchronization data after the first synchronization frequency point is switched to the working frequency point.
In a third aspect, the present invention provides a server, comprising a memory and a processor, wherein the memory stores a computer program executable by the processor, and the processor executes the computer program to implement the base station synchronization method according to any one of the above.
In a fourth aspect, the present invention provides a computer readable storage medium storing a computer program comprising program instructions which, when executed, implement a base station synchronization method as defined in any one of the preceding claims.
The invention switches the working frequency point and the synchronous frequency point of the base station, and selects the frequency point with the strongest signal as the synchronous frequency point, so that the base station can still stably realize synchronization under the condition of weak working frequency point signals.
Drawings
Fig. 1 is a flowchart of a base station synchronization method according to a first embodiment of the present invention.
Fig. 2 is a flowchart of a base station synchronization method in the second embodiment of the present invention.
Fig. 3 is a flowchart of a base station synchronization method in a third embodiment of the present invention.
Fig. 4 is a flowchart of a base station synchronization method in the fourth embodiment of the present invention.
Fig. 5 is a block diagram of a base station synchronization apparatus according to a fifth embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a server in a sixth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. A process may be terminated when its operations are completed, but may have additional steps not included in the figure. A process may correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.
Furthermore, the terms "first," "second," and the like may be used herein to describe various orientations, actions, steps, elements, or the like, but the orientations, actions, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. For example, a first template may be referred to as a second template, and similarly, a second template may be referred to as a first template, without departing from the scope of the present application. The first template and the second template are both frame templates, but are not the same template. The terms "first", "second", etc. are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The abbreviations and terms used in the following examples have the following meanings:
LTE: long Term Evolution (LTE) network and LTE system introduce OFDM (Orthogonal Frequency Division Multiplexing) and MIMO (multiple-Input and multiple-Output) key technologies, so that the spectrum efficiency and the data transmission rate are obviously increased, and multiple bandwidth allocation is supported.
Frequency points: the fixed frequencies are numbered. According to the frequency interval of 200KHz, 125 wireless frequency sections are divided from 890MHz, 890.2MHz, 890.4MHz, 890.6MHz, 890.8MHz and 891MHz … … 915MHz, and each frequency section is numbered from 1, 2, 3 and 4 … … 125; these numbers for fixed frequencies are frequency points; in the GSM network, the frequency is replaced by a frequency point to specify the transmitting frequency of the transceiver group. For example, the following steps: a carrier is assigned a frequency point of 3, that is to say that the carrier will receive an upstream signal with a frequency of 890.4MHz and transmit a signal at a frequency of 935.4 MHz. Wherein 1-94 belong to China Mobile, 96-124 belong to China Unicom, and 95 is reserved to distinguish two operators.
And a subframe: the TD-LTE designs a special frame structure as follows for the need of uplink and downlink time conversion in TDD mode. The wireless frame structure is adopted, the length of the wireless frame is 10ms, the wireless frame structure is composed of two half frames with the length of 5ms, each half frame is composed of 5 subframes with the length of 1ms, and the wireless frame structure comprises 4 common subframes and 1 special subframe. The whole frame can also be understood as being divided into 10 sub-frames with the length of 1ms as the unit (i.e. TTI) for data scheduling and transmission. The time slot is used for a protection interval between uplink and downlink, the corresponding time length is about 71-714 mu s, and the radius of the corresponding cell is 7-100 km.
And (4) DSP: (Digital Signal Processing) baseband Digital Signal Processing, i.e. Processing the communication Signal by means of numerical calculation.
ZC sequence: the Zadoff-chu sequence is a sequence sent by a communication signal and can be divided into two categories, wherein the first category is generated by a basic sequence through cyclic shift; the second type utilizes the characteristic that the DFT of the ZC sequence is still the ZC sequence, simplifies the calculated amount of the PRACH signal, and generates the ZC sequence by DFT conversion and IFFT conversion. ZC sequences have very good auto-correlation and very low cross-correlation properties, which can be used to generate synchronization signals as a correlated transport of time and frequency. The LTE system uses ZC sequences as the synchronization training sequences.
Example one
Fig. 1 is a flowchart of a base station synchronization method according to an embodiment of the present invention, where the embodiment is applicable to a situation where a to-be-synchronized base station and a reference base station perform primary synchronization, and the method can be executed by the to-be-synchronized base station.
The first synchronization referred in this embodiment and the second synchronization referred in the following embodiments both refer to base station synchronization between the base station to be synchronized and the reference base station, because TDD is a time division multiplexing standard commonly used in the current LTE communication network architecture, TDD is a time division multiplexing standard, TDD cells in the same frequency band in the same area need to acquire timing synchronization in order to avoid interference between different cells, and the synchronization process needs to make the clock of the base station to be synchronized and the clock of the reference base station consistent. The base station synchronization method includes air interface synchronization and GPS synchronization, and the synchronization methods used in this embodiment and the following embodiments are both air interface synchronization, and the base station to be synchronized performs timing synchronization by using the signal of the reference base station.
The embodiment specifically comprises the following steps:
s101, switching the working frequency point to a first synchronous frequency point.
In this step, the working frequency point refers to a frequency point at which the base station performs normal service operation and data transmission, and the frequency point can receive data and output signals, and is generally an optimal frequency point for ensuring maximum access of users; the first synchronization frequency point is a frequency point used by the base station to perform base station synchronization, and in this embodiment, preferably, the first synchronization frequency point is a frequency point with the strongest signal among available frequency points of the base station, at which the base station to be synchronized only receives data and does not output data.
And S102, receiving first synchronization data at the first synchronization frequency point.
In the step, the base station to be synchronized needs to determine the monitored reference base station, and obtains first synchronization data from the adjacent reference base station needing to be monitored, and adjusts the self parameters to realize synchronization. Specifically, the base station to be synchronized scans an air interface signal of a neighboring base station, and the neighboring base station with the largest air interface signal strength is used as a reference base station.
The first synchronization data mentioned in this step refers to data information used for base station synchronization, including but not limited to frame number, frame synchronization information, time information, etc., and the first synchronization data is generally located at the head of the data frame and used for synchronizing the base station to be synchronized with the reference base station based on the data information. Optionally, the first synchronization frequency point may receive synchronization data, and may also receive service data.
S103, after the first synchronization frequency point is switched to a working frequency point, first synchronization is conducted on the base station to be synchronized based on the first synchronization data.
In this step, the first synchronization process is: and transmitting the first synchronous data to a DSP (digital signal processor) broadcast-decoding channel to obtain frequency deviation between the adjacent reference base station and the local station, converting the frequency deviation into digital voltage by using a processor or a programmable logic unit, converting the digital voltage into analog voltage by using a pulse width modulation or digital-to-analog conversion circuit, controlling the clock output of a crystal oscillator, and using the time deviation for adjusting the time sequence of an antenna port of the base station to be synchronized so as to achieve synchronization.
In this step, since the process of switching between the first synchronization frequency point and the working frequency point consumes a certain amount of time, in order to prevent the switching process from affecting the normal service work of the base station to be synchronized, the first synchronization frequency point is switched to and then the working frequency point is immediately switched back after receiving the first synchronization data, and the first synchronization data is processed and synchronized at the working frequency point. If the data in step S102 also includes service data, the synchronous base station will process the service data after switching back to the working frequency point.
In the embodiment, the base station is switched to the first synchronization frequency point with stronger signal from the working frequency point, so that the base station can synchronize at the frequency point with stronger signal, and synchronization failure is avoided.
Example two
Fig. 2 is a flowchart of a base station synchronization method provided in this embodiment, where this embodiment is suitable for a base station to perform multiple frequency point switching and multiple synchronization, specifically including one initial synchronization and multiple periodic frame offset adjustments. The method can be executed by a base station to be synchronized, and specifically comprises the following steps:
s201, switching the working frequency point to a first synchronous frequency point.
S202, receiving first synchronization data at the first synchronization frequency point.
S203, after the first synchronization frequency point is switched to the working frequency point, first synchronization is carried out on the base station to be synchronized based on the first synchronization data.
In this step, the base station to be synchronized may perform the first synchronization at the first synchronization frequency point, or may perform the first synchronization at the working frequency point. Because the process of mutually switching the first synchronization frequency point and the working frequency point consumes a certain amount of time, preferably, in order to prevent the consumed time of the switching process from influencing the normal service work of the base station to be synchronized, the first synchronization frequency point is switched back to the working frequency point immediately after receiving the first synchronization data, and the first synchronization data is processed and synchronized at the working frequency point. If the data in step S202 also includes service data, the synchronous base station will process the service data after switching back to the working frequency point.
And S204, switching the working frequency point to a second synchronous frequency point once or for many times after a preset time interval.
The preset time interval in this step is a period of the air interface synchronization, and is generally 1 to 5 seconds in units of seconds(s), and exemplarily, in this embodiment, the second synchronization period is 2 seconds. After the first synchronization is completed, the base station to be synchronized and the reference base station have already achieved initial synchronization at a lower time precision, but because the base station may have a slight timing error in the working process, the error generally occurs in a time scale of microsecond (μ s) or less, and the error accumulation and expansion can be avoided by periodically adjusting the frame offset.
In the base station synchronization method according to this embodiment, the accuracy of the first synchronization is lower than the accuracy of the second synchronization, and illustratively, the first synchronization enables the base station to be synchronized and the reference base station to achieve initial timing synchronization at a low time accuracy of millisecond (ms) and second(s), and the second synchronization enables the base station to be synchronized and the reference base station to achieve timing synchronization at a microsecond (μ s) and higher time accuracy.
And S205, receiving second synchronous data at the second synchronous frequency point each time.
In the step, every 2 seconds, the base station to be synchronized acquires second synchronization data from the adjacent reference base station to be monitored, and adjusts the parameters of the base station to be synchronized to realize synchronization. Specifically, the base station to be synchronized scans an air interface signal of a neighboring base station, and the neighboring base station with the largest air interface signal strength is used as a reference base station.
The second synchronization data refers to data information used for base station synchronization, including but not limited to frame number, frame synchronization information, time information, etc., and is generally located at the head of the data frame, so as to enable the base station to be synchronized to the reference base station based on the data information. Optionally, the second synchronization data may be received at the second synchronization frequency point, and the receiving may also include receiving service data.
And S206, performing second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time.
In this step, the second synchronization process is: and calculating second synchronous data of the received reference base station, calculating the second synchronous data by using a preset algorithm to obtain an adjustment value after switching from the second synchronous frequency point to a working frequency point each time, and adjusting the time sequence of the base station to be synchronized according to the adjustment value to achieve synchronization. Specifically, the preset algorithm may be: sequentially carrying out filtering processing and data alignment processing on the second synchronous data to obtain aligned second synchronous data; correlating the aligned second synchronous data with a known ZC sequence; the distance between the position with the maximum correlation and the target position is used as an adjustment value.
And S207, adjusting the clock of the base station to be synchronized based on the adjusting value, so that the clock of the base station to be synchronized and the clock of the reference base station realize second synchronization.
In this embodiment, the network performance is affected by the cross interference of the uplink and downlink timeslots of the data frame, and the small timing error can be periodically corrected while the timing synchronization is maintained between the base station to be synchronized and the reference base station through one-time initial synchronization and one-time or multiple-time periodic synchronization, thereby avoiding error accumulation. The data transmission process of the base station to be synchronized and other base stations is ensured to be stable and not interfered for a long time.
EXAMPLE III
As shown in fig. 3, which is a flow chart of a base station synchronization method in this embodiment, the present embodiment adds a selection process of frequency point signals before each synchronization on the basis of the above embodiments, selects a frequency point with a strongest signal from a plurality of selectable frequency points as the first synchronization frequency point or the second synchronization frequency point, and switches from the working frequency point to the first synchronization frequency point or from the working frequency point to the second synchronization frequency point, so that each base station synchronization can be performed at the frequency point with the strongest signal, and the specific steps are as follows:
s301, selecting the frequency point with the strongest signal from the selectable multiple frequency points as the first synchronous frequency point.
In this step, optionally, the frequency point selection of the strongest signal may be performed once before switching from the working frequency point to the first synchronization frequency point each time, or the frequency point selection of the strongest signal may be performed only once.
S302, switching from the working frequency point to the first synchronous frequency point.
And S303, switching the working frequency point to the first synchronous frequency point.
And S304, receiving first synchronization data at the first synchronization frequency point.
S305, after the first synchronization frequency point is switched to the working frequency point, first synchronization is conducted on the base station to be synchronized based on the first synchronization data.
S306, selecting the frequency point with the strongest signal from the selectable multiple frequency points as the second synchronous frequency point.
In this step, the first synchronous frequency point and the second synchronous frequency point are the same frequency point or different frequency points.
And S307, switching from the working frequency point to the second synchronous frequency point.
And S308, switching the working frequency point to a second synchronous frequency point once or for many times after a preset time interval.
In this step, optionally, the frequency point selection with the strongest signal may be performed once before switching from the working frequency point to the second synchronization frequency point each time, or the frequency point selection with the strongest signal may be performed only once.
And S309, receiving second synchronous data at the second synchronous frequency point each time.
And S310, performing second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time.
In this embodiment, the first synchronization frequency point and the second synchronization frequency point are the same frequency point or different frequency points.
In this embodiment, before each synchronization, a frequency point with the strongest signal is selected from a plurality of selectable frequency points and used as the first synchronization frequency point or the second synchronization frequency point, so that each base station synchronization can be performed at the frequency point with the strongest signal, and the synchronization process of the base station to be synchronized is more stable.
Example four
As shown in fig. 4, which is a flowchart of a base station synchronization method in this embodiment, the present embodiment refines a specific calculation step of the base station synchronization method based on the foregoing embodiment, and specifically includes:
s401, switching the working frequency point to a first synchronous frequency point.
S402, receiving first synchronization data at the first synchronization frequency point.
And S403, performing first synchronization on the base station to be synchronized based on the first synchronization data after switching from the first synchronization frequency point to the working frequency point.
And S404, switching the working frequency point to a second synchronous frequency point once or for many times after a preset time interval.
And S405, receiving second synchronous data at the second synchronous frequency point every time.
And S406, performing second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time.
In this step, the data frame of the second synchronization data includes a first subframe, a second subframe and a third subframe, the first subframe is located at the head of the data frame, the second subframe is a subframe adjacent to the first subframe, and the third subframe is located at the tail of the data frame; optionally, the data frame of this step may further include one or more other subframes located after the second subframe and before the third subframe, and the one or more other subframes may include traffic data therein.
In the data frame structure including the first subframe, the second subframe, and the third subframe, the steps S404 to S406 specifically include the following steps:
switching the working frequency point to the second synchronous frequency point in the time period of the first subframe;
receiving the second synchronous data in the second subframe at the second synchronous frequency point;
and performing second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time in the time period of the third subframe.
In the above steps, each subframe is 1ms in length based on the need of uplink and downlink data transmission, and the subframe is used as a unit for data scheduling and transmission. In the step, the base station to be synchronized is switched from the working frequency point to a second synchronization frequency point within 1ms of the first subframe; receiving the second synchronization data in a second subframe, optionally including traffic data in the second subframe and/or other subframe or subframes; and switching the base station to be synchronized from the second synchronous frequency point back to the working frequency point within the 1ms time period of the third subframe and performing data processing, wherein the data processing comprises second synchronous data processing and service data processing. Preferably, after the working frequency point is switched back to the synchronization, the second synchronization data is preferentially processed, and if the service data is received, the service data is processed after the second synchronization data is processed.
In this step, the base station to be synchronized performs subsequent service processing based on the adjusted timing sequence, and switches the working frequency point to the second synchronization frequency point again until a preset time interval elapses, and performs the next air interface period adjustment.
In the embodiment, the frequency point switching is performed in the time interval of the subframe, so that the influence on the normal service of the base station is reduced.
EXAMPLE five
As shown in fig. 5, the present embodiment provides a base station synchronization apparatus 5, which includes the following modules:
a first switching module 501, configured to switch a working frequency point to a first synchronization frequency point;
a first receiving module 502, configured to receive first synchronization data at the first synchronization frequency point;
a first synchronization module 503, configured to perform a first synchronization on the base station to be synchronized based on the first synchronization data after the first synchronization frequency point is switched to the working frequency point.
In an alternative embodiment, the base station synchronization apparatus 5 further includes:
a second switching module 504, configured to switch the working frequency point to a second synchronous frequency point one or more times after a preset time interval;
a second receiving module 505, configured to receive second synchronization data at the second synchronization frequency point each time;
a second synchronization module 506, configured to perform second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time, and specifically, calculate the second synchronization data by using a preset algorithm to obtain an adjustment value; and adjusting the clock of the base station to be synchronized based on the adjustment value so as to realize second synchronization between the clock of the base station to be synchronized and the clock of the reference base station.
A selecting module 507, configured to select a frequency point with the strongest signal from a plurality of selectable frequency points as the first synchronization frequency point or the second synchronization frequency point; and switching from the working frequency point to the first synchronous frequency point or switching from the working frequency point to the second synchronous frequency point.
The data frame of the second synchronous data comprises a first subframe, a second subframe and a third subframe, wherein the first subframe is positioned at the head of the data frame, the second subframe is a subframe adjacent to the first subframe, and the third subframe is positioned at the tail of the data frame; the second switching module 504 is configured to switch the working frequency point to the second synchronous frequency point within the time period of the first subframe; the second receiving module 505 is configured to receive the second synchronization data in the second subframe at the second synchronization frequency point; the second synchronization module 506 is configured to perform second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time within the time period of the third subframe.
The base station synchronization device provided by the embodiment of the invention can execute the base station synchronization method provided by any embodiment of the invention, and has corresponding execution methods and beneficial effects of the functional modules.
EXAMPLE six
Fig. 6 is a schematic structural diagram of a server according to a sixth embodiment of the present invention, and as shown in fig. 6, the apparatus includes a processor 601, a memory 602, an input device 603, and an output device 604; the number of processors 601 in the device may be one or more, and fig. 6 takes one processor 601 as an example; the processor 601, the memory 602, the input device 603 and the output device 604 of the apparatus may be connected by a bus or other means, and fig. 6 illustrates the connection by a bus as an example.
The memory 602 is used as a computer-readable storage medium, and can be used to store software programs, computer-executable programs, and modules, such as the modules corresponding to the base station synchronization method in the first embodiment of the present invention (for example, the second receiving module 505, the second synchronization module 506, and the like in the fifth embodiment). The processor 601 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the memory 602, that is, implementing one of the base station synchronization methods described above.
The memory 602 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 602 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 602 may further include memory located remotely from the processor 601, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
EXAMPLE seven
An embodiment provides a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a method of base station synchronization, the method comprising:
switching the working frequency point to a first synchronous frequency point;
receiving first synchronization data at the first synchronization frequency point;
and performing first synchronization on the base station to be synchronized based on the first synchronization data after the first synchronization frequency point is switched to the working frequency point.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform operations related to a base station synchronization method provided by any embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-only memory (ROM), a Random Access Memory (RAM), a FLASH memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the search apparatus, the included modules are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, the specific names of the functional modules are only for convenience of distinguishing from each other and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A base station synchronization method, comprising:
switching the working frequency point to a first synchronous frequency point;
receiving first synchronization data at the first synchronization frequency point;
after the first synchronous frequency point is switched to a working frequency point, carrying out first synchronization on the base station to be synchronized based on the first synchronous data;
after a preset time interval, switching the working frequency point to a second synchronous frequency point for one or more times, wherein the preset time interval is a period of air interface synchronization;
the data received at the first synchronous frequency point comprise synchronous data and service data;
the first synchronization of the base station to be synchronized comprises executing first synchronization at the first synchronization frequency point and executing first synchronization at the working frequency point.
2. The method of claim 1, wherein after the first synchronization of the base station to be synchronized is performed based on the first synchronization data after the first synchronization frequency point is switched to the working frequency point, the method further comprises:
receiving second synchronous data at the second synchronous frequency point each time;
and performing second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time.
3. The method according to claim 2, wherein the step of switching the working frequency point to the first synchronization frequency point or the working frequency point to the second synchronization frequency point comprises:
selecting a frequency point with the strongest signal from a plurality of selectable frequency points as the first synchronous frequency point or the second synchronous frequency point;
and switching from the working frequency point to the first synchronous frequency point or switching from the working frequency point to the second synchronous frequency point.
4. The method according to claim 3, wherein the first synchronization frequency point and the second synchronization frequency point are the same frequency point or different frequency points.
5. A method for synchronizing base stations according to claim 3, characterized in that the accuracy of said first synchronization is lower than the accuracy of said second synchronization.
6. The method of claim 2, wherein the second synchronization of the base station based on the second synchronization data comprises:
calculating the second synchronous data by using a preset algorithm to obtain an adjustment value;
and adjusting the clock of the base station to be synchronized based on the adjustment value so as to realize second synchronization between the clock of the base station to be synchronized and the clock of the reference base station.
7. The base station synchronization method according to claim 2, wherein the data frame of the second synchronization data includes a first subframe, a second subframe and a third subframe, the first subframe is located at the head of the data frame, the second subframe is a subframe next to the first subframe, and the third subframe is located at the tail of the data frame;
after the preset time interval, switching the working frequency point to a second synchronous frequency point for one time or multiple times;
receiving second synchronous data at the second synchronous frequency point each time;
after each time of switching from the second synchronous frequency point to the working frequency point, performing second synchronization on the base station to be synchronized based on the second synchronous data comprises:
switching the working frequency point to the second synchronous frequency point in the time period of the first subframe;
receiving the second synchronous data in the second subframe at the second synchronous frequency point;
and performing second synchronization on the base station to be synchronized based on the second synchronization data after switching from the second synchronization frequency point to the working frequency point each time in the time period of the third subframe.
8. A base station synchronization apparatus, comprising:
the first switching module is used for switching the working frequency point to a first synchronous frequency point;
a first receiving module, configured to receive first synchronization data at the first synchronization frequency point;
the first synchronization module is used for carrying out first synchronization on the base station to be synchronized based on the first synchronization data after the first synchronization frequency point is switched to the working frequency point;
the second switching module is used for switching the working frequency point to a second synchronous frequency point for one time or multiple times after a preset time interval; the preset time interval is a period of air interface synchronization;
the data received at the first synchronous frequency point comprises synchronous data and service data;
the first synchronization of the base station to be synchronized comprises executing first synchronization at the first synchronization frequency point and executing first synchronization at the working frequency point.
9. A server, characterized in that it comprises a memory and a processor, said memory having stored thereon a computer program being executable on the processor, said processor implementing the base station synchronization method according to any of claims 1-7 when executing said computer program.
10. A computer-readable storage medium, characterized in that the storage medium stores a computer program comprising program instructions that, when executed, implement the base station synchronization method according to any one of claims 1-7.
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| CN102186236A (en) * | 2011-04-27 | 2011-09-14 | 京信通信系统（中国）有限公司 | Method and device for timing synchronization among micro-cellular base stations |
| CN103167600A (en) * | 2013-03-29 | 2013-06-19 | 京信通信系统（广州）有限公司 | Method and device for synchronizing base stations |
| WO2016101174A1 (en) * | 2014-12-24 | 2016-06-30 | 华为技术有限公司 | Communication system, base station and clock synchronization method |
| CN110022603A (en) * | 2018-01-09 | 2019-07-16 | 大唐移动通信设备有限公司 | Synchronous method and device between a kind of base station |
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| CN103684729A (en) * | 2012-09-05 | 2014-03-26 | 中国移动通信集团公司 | Clock synchronization device and method |
| CN108012320B (en) * | 2016-10-28 | 2021-06-18 | 中兴通讯股份有限公司 | Method, device and system for realizing air interface synchronization of base station |
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| CN102186236A (en) * | 2011-04-27 | 2011-09-14 | 京信通信系统（中国）有限公司 | Method and device for timing synchronization among micro-cellular base stations |
| CN103167600A (en) * | 2013-03-29 | 2013-06-19 | 京信通信系统（广州）有限公司 | Method and device for synchronizing base stations |
| WO2016101174A1 (en) * | 2014-12-24 | 2016-06-30 | 华为技术有限公司 | Communication system, base station and clock synchronization method |
| CN110022603A (en) * | 2018-01-09 | 2019-07-16 | 大唐移动通信设备有限公司 | Synchronous method and device between a kind of base station |
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