CN112040541B - Frequency adjustment method, device, terminal and storage medium - Google Patents
Frequency adjustment method, device, terminal and storage medium Download PDFInfo
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- CN112040541B CN112040541B CN202010968509.0A CN202010968509A CN112040541B CN 112040541 B CN112040541 B CN 112040541B CN 202010968509 A CN202010968509 A CN 202010968509A CN 112040541 B CN112040541 B CN 112040541B
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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
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
Abstract
The application discloses a frequency adjustment method, a frequency adjustment device, a terminal and a storage medium, and belongs to the technical field of communication. The method is performed by a terminal, and comprises the following steps: acquiring a first carrier deviation, wherein the first carrier deviation is used for indicating the deviation between the carrier frequency of a base station and the carrier frequency of a signal received by a terminal by the base station; acquiring a second carrier deviation, wherein the second carrier deviation is used for indicating the deviation between the carrier frequency of the terminal and the carrier frequency of a signal received by the terminal and sent by the base station; calculating Doppler frequency shift of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation; and according to the Doppler frequency shift, carrying out frequency adjustment on the signal transmitted by the subsequent received base station. According to the method and the device, inaccuracy caused by adjusting the carrier frequency of the downlink signal according to the deviation between the carrier frequency of the terminal and the carrier frequency of the signal sent by the base station can be avoided, and accuracy of time-frequency synchronization between the terminal and the base station is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a frequency adjustment method, a device, a terminal, and a storage medium.
Background
With the rapid development of the communication technology field, in daily life of people, more and more scenes need data transmission, such as application programs in terminals, sending short messages, dialing telephone, and the like.
In these above data transmission scenarios, for transmission between a terminal and a base station in which a communication connection is established, in order to ensure normal transmission of data between the terminal and the base station, the terminal needs to keep time-frequency synchronization with the base station. In practical application, because the terminal continuously moves and the crystal oscillator used by the terminal and the base station is different, a deviation exists between the carrier frequency of the terminal and the frequency of the received base station transmitting signal, the terminal generally calculates the frequency deviation between the terminal and the base station according to the received downlink signal of the base station, so that the clock frequency and the carrier frequency of the terminal are adjusted, the clock frequency of the terminal is consistent with the clock frequency of the base station, and the carrier frequency of the terminal is consistent with the carrier frequency of the base station.
At present, in the scheme, the deviation directly calculated by the terminal according to the downlink signal issued by the base station can contain Doppler frequency shift, so that timing drift can be generated when the terminal performs time-frequency synchronization, and the accuracy of time-frequency synchronization adjustment of the terminal and the base station is reduced.
Disclosure of Invention
The embodiment of the application provides a frequency adjustment method, a frequency adjustment device, a terminal and a storage medium, which can improve the accuracy of time-frequency synchronization maintained by the terminal and a base station. The technical scheme is as follows:
in one aspect, embodiments of the present application provide a frequency adjustment method, which is performed by a terminal, the method including:
acquiring a first carrier deviation, wherein the first carrier deviation is used for indicating the deviation between the local carrier frequency of a base station and the carrier frequency of a signal sent by the terminal received by the base station;
acquiring a second carrier deviation, wherein the second carrier deviation is used for indicating the deviation between the local carrier frequency of the terminal and the carrier frequency of the signal sent by the base station received by the terminal;
calculating Doppler frequency shift of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
and according to the Doppler frequency shift, carrying out frequency adjustment on the signal transmitted by the subsequent received base station.
In one aspect, embodiments of the present application provide a frequency adjustment method, which is performed by a base station, the method including:
acquiring a first carrier deviation, wherein the first carrier deviation is used for indicating the deviation between the local carrier frequency of the base station and the carrier frequency of a signal sent by a first terminal received by the base station;
Carrying the first carrier deviation in a media access control layer (MAC) signaling;
and sending the MAC signaling to the first terminal, so that the first terminal calculates Doppler frequency shift of the first terminal relative to the base station according to the first carrier deviation carried in the MAC signaling.
On the other hand, an embodiment of the present application provides a frequency adjustment device, where the device is used in a terminal, and the device includes:
the first acquisition module is used for acquiring a first carrier deviation, and the first carrier deviation is used for indicating deviation between the carrier frequency of the local base station and the carrier frequency of the signal sent by the terminal received by the base station;
the second acquisition module is used for acquiring a second carrier deviation, and the second carrier deviation is used for indicating the deviation between the local carrier frequency of the terminal and the carrier frequency of the signal sent by the base station received by the terminal;
the Doppler frequency shift calculation module is used for calculating the Doppler frequency shift of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
and the frequency adjustment module is used for carrying out frequency adjustment on the signal transmitted by the subsequent received base station according to the Doppler frequency shift.
In another aspect, an embodiment of the present application provides a frequency adjustment apparatus, where the apparatus is used in a base station, and the apparatus includes:
a third obtaining module, configured to obtain a first carrier deviation, where the first carrier deviation is used to indicate a deviation between a carrier frequency local to the base station and a carrier frequency of a signal received by the base station and sent by a first terminal;
an adding module, configured to carry the first carrier deviation in a MAC signaling of a media access control layer;
and the signaling sending module is used for sending the MAC signaling to the first terminal so that the first terminal calculates Doppler frequency shift of the first terminal relative to the base station according to the first carrier deviation carried in the MAC signaling.
In another aspect, embodiments of the present application provide a computer device, where the computer device includes a processor and a memory, where at least one instruction, at least one program, a code set, or an instruction set is stored in the memory, where the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the frequency adjustment method according to the above aspect.
In another aspect, embodiments of the present application provide a computer readable storage medium having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, the at least one instruction, the at least one program, the set of codes, or the set of instructions being loaded and executed by a processor to implement the frequency adjustment method as described in the previous aspect.
In another aspect, embodiments of the present application provide a computer program product comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, the processor executing the computer instructions, causing the computer device to perform the frequency adjustment method provided in one of the above aspects.
The beneficial effects that technical scheme that this application embodiment provided include at least:
according to the method and the device, the Doppler frequency shift between the terminal and the base station caused by movement of the terminal can be obtained, the carrier frequency of the downlink signal received by the terminal is adjusted according to the Doppler frequency shift, the inaccuracy of timing caused by the fact that the terminal directly adjusts the carrier frequency of the downlink signal according to the deviation between the carrier frequency of the terminal and the carrier frequency of the signal sent by the base station or directly adjusts the reference frequency of the crystal oscillator is avoided, and the accuracy of time-frequency synchronization between the terminal and the base station is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a wireless communication system according to an exemplary embodiment of the present application;
fig. 2 is a schematic diagram illustrating generation of an internal carrier frequency and a clock frequency of a terminal according to an exemplary embodiment of the present application;
fig. 3 is a method flow chart of a frequency adjustment method according to an exemplary embodiment of the present application;
fig. 4 is a method flowchart of a frequency adjustment method according to an exemplary embodiment of the present application;
fig. 5 is a method flowchart of a frequency adjustment method according to an exemplary embodiment of the present application;
FIG. 6 is a schematic diagram of a mobile phone according to an exemplary embodiment of the present application;
fig. 7 is a method flowchart of a frequency adjustment method according to an exemplary embodiment of the present application;
fig. 8 is a block diagram of a frequency adjustment device according to an exemplary embodiment of the present application;
Fig. 9 is a block diagram of a frequency adjustment device according to an exemplary embodiment of the present application;
FIG. 10 is a schematic diagram of a computer device according to an exemplary embodiment of the present application;
fig. 11 is a schematic structural diagram of a base station according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
The scheme provided by the application can be used in a real scene that a control terminal performs frequency adjustment and a base station keeps time-frequency synchronization when a user uses a terminal with a data transmission function in daily life, and for convenience of understanding, the structure of a communication scene related to the embodiment of the application is simply introduced.
Referring to fig. 1, a schematic diagram of a wireless communication system according to an exemplary embodiment of the present application is shown. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: a number of terminals 110 and a base station 120.
Where terminal 110 may be a device that provides voice and/or data connectivity to a user. Terminal 110 may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), and terminal 110 may be an internet of things terminal such as a sensor device, a mobile phone (or "cellular" phone), and a computer with an internet of things terminal, for example, a fixed, portable, pocket, hand-held, computer-built-in, or vehicle-mounted device. Such as a Station (STA), subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), mobile Station (Mobile), remote Station (Remote Station), access point, remote Terminal (Remote Terminal), access Terminal (Access Terminal), user Equipment (User Terminal), user Agent (User Agent), user Equipment (User Device), or User Equipment (UE). Alternatively, the terminal 110 may be an unmanned aerial vehicle device, an in-vehicle device, or the like.
The base station 120 may be a network device in a wireless communication system. The wireless communication system may also be a 5G system, also called New Radio (NR) system. Alternatively, the wireless communication system may be a next generation system of the 5G system.
Alternatively, the base station 120 may be a base station (gNB) in a centralized and distributed architecture in a 5G system. When the base station 120 adopts a centralized and Distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DUs). A protocol stack of a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, a radio link layer control protocol (Radio Link Control, RLC) layer, and a medium access control (Media Access Control, MAC) layer is provided in the centralized unit; a Physical (PHY) layer protocol stack is disposed in the distribution unit, and the specific implementation of the base station 120 is not limited in this embodiment of the present application.
A wireless connection may be established between base station 120 and terminal 110 over a wireless air interface. In various embodiments, the wireless air interface is a wireless air interface based on a fifth generation mobile communication network technology (5G) standard, such as the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G-based technology standard of a next generation mobile communication network.
Optionally, the wireless communication system may further include a network management device 130.
The base stations 120 may be respectively connected to the network management device 130. The network management device 130 may be a core network device in a wireless communication system, for example, the network management device 130 may be a mobility management entity (Mobility Management Entity, MME) in an evolved packet core network (Evolved Packet Core, EPC). Alternatively, the network management device may be other core network devices, such as a Serving Gateway (SGW), a public data network gateway (Public Data Network Gate Way, PGW), a policy and charging rules function (Policy and Charging Rules Function, PCRF) or a home subscriber server (Home Subscriber Server, HSS), etc. The embodiment of the present application is not limited to the implementation form of the network management device 130.
For the terminal in fig. 1, the terminal may receive the downlink signal from the base station, or may send the uplink signal to the base station, where the frequencies used by each part of modules in the terminal are all multiplied by the reference frequency of the same crystal oscillator, and after the terminal calculates the deviation between the carrier frequency of the terminal and the carrier frequency of the received downlink signal, the reference frequency of the crystal oscillator in the terminal may be calibrated by the corresponding feedback mechanism, so as to adjust the carrier frequency and the clock frequency, and realize time-frequency synchronization between the terminal and the base station.
Referring to fig. 2, a schematic diagram of generating an internal carrier frequency and a clock frequency of a terminal according to an exemplary embodiment of the present application is shown. As shown in fig. 2, the crystal oscillator module 200 performs frequency multiplication adjustment according to its own reference frequency Fbase, so as to obtain a reference frequency of clock frequency fclock=m times and a reference frequency of carrier frequency fcarrier=n times. Wherein M, N may be any positive number. As can be seen from fig. 2, the clock frequency and the carrier frequency of the terminal are multiplied based on the reference frequency of the same crystal oscillator, and when the terminal calculates the carrier frequency deviation between the carrier frequency of the terminal and the carrier frequency of the downlink signal of the base station, the reference frequency of the crystal oscillator module 200 can be calibrated or adjusted by a feedback mechanism, so as to adjust the clock frequency and the carrier frequency, thereby realizing time-frequency synchronization between the terminal and the base station.
However, the carrier frequency deviation between the carrier frequency of the terminal and the carrier frequency of the downlink signal of the base station may include doppler shift, that is, the carrier frequency deviation between the carrier frequency of the terminal and the carrier frequency of the downlink signal of the base station may include, besides the carrier frequency deviation between the terminal and the base station, the carrier frequency deviation caused by the movement of the terminal, in practical application, the carrier frequency deviation between the carrier frequency of the terminal and the carrier frequency of the downlink signal of the base station may be directly used as the carrier frequency deviation between the terminal and the base station, and the reference frequency of the crystal oscillator may be adjusted, so that the carrier frequency and the clock frequency may be adjusted.
In order to maintain accuracy of time-frequency synchronization between the terminal and the base station, the method for performing time-frequency synchronization in the control terminal is extended, and a solution is provided in the present application, please refer to fig. 3, which is a flowchart illustrating a method for frequency adjustment according to an exemplary embodiment of the present application. The method can be applied to the terminal with the frequency adjustment function shown in fig. 1. As shown in fig. 3, the frequency adjustment method may include the steps of:
Optionally, in the present application, the base station may calculate a difference between a carrier frequency of the received uplink signal sent by the terminal and a local carrier frequency of the base station, where the difference is the first carrier deviation. The terminal can acquire the first carrier deviation through the instruction carrying the first carrier deviation issued by the base station, or the terminal can actively send a request instruction to the base station and receive the first carrier deviation returned by the base station in response to the request instruction. The request instruction is used for acquiring a first carrier deviation.
Optionally, the terminal may calculate the carrier frequency deviation between itself and the base station according to the local carrier frequency and the carrier frequency of the signal sent by the received base station.
In the application, the terminal may establish an equation including the doppler shift and the actual carrier deviation according to the obtained first carrier deviation and the second carrier deviation, so as to obtain the doppler shift of the terminal relative to the base station.
Optionally, in the present application, the doppler shift is used to adjust the carrier frequency of the signal sent by the received base station, so that the difference between the carrier frequency of the signal sent by the subsequent received base station and the local carrier frequency is smaller.
In summary, the method and the device can enable the terminal to acquire the Doppler frequency shift between the terminal and the base station caused by movement of the terminal, and adjust the carrier frequency of the downlink signal received by the terminal according to the Doppler frequency shift, so that inaccuracy of timing caused by directly adjusting the carrier frequency of the downlink signal according to deviation between the carrier frequency of the terminal and the carrier frequency of the signal transmitted by the base station or directly adjusting the reference frequency of the crystal oscillator is avoided, and accuracy of time-frequency synchronization between the terminal and the base station is improved.
In order to maintain accuracy of time-frequency synchronization between the terminal and the base station, the method for performing time-frequency synchronization in the control terminal is extended, and a solution is provided in the present application, please refer to fig. 4, which shows a method flowchart of a frequency adjustment method provided in an exemplary embodiment of the present application. The method can be applied to the base station shown in fig. 1 and executed by the base station. As shown in fig. 4, the frequency adjustment method may include the steps of:
Alternatively, the first terminal may be a terminal having a communication connection established with the base station, for example the terminal in the embodiment of fig. 3 described above.
In summary, the method and the device can enable the terminal to acquire the Doppler frequency shift between the terminal and the base station caused by movement of the terminal, and adjust the carrier frequency of the downlink signal received by the terminal according to the Doppler frequency shift, so that inaccuracy of timing caused by directly adjusting the carrier frequency of the downlink signal according to deviation between the carrier frequency of the terminal and the carrier frequency of the signal transmitted by the base station or directly adjusting the reference frequency of the crystal oscillator is avoided, and accuracy of time-frequency synchronization between the terminal and the base station is improved.
In one possible implementation manner, the terminal may further calculate an actual carrier deviation of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation, and adjust the reference frequency of the crystal oscillator in the terminal according to the actual carrier deviation. Taking the example that the terminal adjusts the carrier frequency not only through doppler shift, but also adjusts the reference frequency of the terminal through the actual carrier, the scheme shown in fig. 3 is described by way of example.
Referring to fig. 5, a method flowchart of a frequency adjustment method according to an exemplary embodiment of the present application is shown. The method can be applied to the terminal with the frequency adjustment function shown in fig. 1. As shown in fig. 5, the frequency adjustment method may include the steps of:
The first carrier deviation is used for indicating deviation between a carrier frequency of the base station local and a carrier frequency of a signal received by the base station and transmitted by the terminal.
Optionally, in the present application, the base station may calculate the difference between the carrier frequency of the received uplink signal sent by the terminal and the carrier frequency local to the base station itself, and send, based on the MAC (Medium Access Control, media access control layer), a target signaling carrying the first carrier deviation, so as to inform the terminal of the first carrier deviation obtained by calculation of the base station itself. For example, the base station may carry the first carrier offset by a MAC CE (Control Element), which may be incorporated into a MAC PDU (Protocol Data Unit ), and transmitted to the terminal through a PDSCH (Physical Downlink Shared Channel ) channel. The transmission procedure and period may refer to a transmission manner of a TA (Transmitter Address ) command between the base station and the terminal, which is not described herein.
Optionally, the terminal may parse the received target signaling, and obtain the first carrier deviation from the target signaling.
In step 503, a second carrier deviation is obtained, where the second carrier deviation is used to indicate a deviation between a carrier frequency of the terminal and a carrier frequency of a signal received by the terminal and sent by the base station.
In one possible implementation manner, the terminal may calculate the second carrier deviation according to the received signal sent by the base station, that is, according to the reference frequency of the crystal oscillator in the terminal, obtain the carrier frequency of the terminal; acquiring carrier frequency of a downlink signal according to a received signal sent by a base station; and acquiring a second carrier deviation according to the carrier frequency of the terminal and the carrier frequency of the downlink signal.
For example, after the terminal receives the signal sent by the base station, the terminal can calculate the carrier frequency (i.e. the local carrier frequency) of the terminal when the terminal receives the downlink signal according to the reference frequency of the self crystal oscillator, and the terminal subtracts the local carrier frequency from the carrier frequency of the received downlink signal to obtain the second carrier deviation. For example, the terminal may generate a carrier frequency of 5kHz (kilohertz) according to the reference frequency of the own crystal oscillator, and the carrier frequency of the downlink signal is 3kHz, and then the terminal may obtain the second carrier deviation as 2kHz. If the carrier frequency generated by the terminal crystal oscillator reference frequency is 3kHz and the carrier frequency of the downlink signal is 5kHz, the terminal can obtain the second carrier deviation of-2 kHz.
In step 504, the doppler shift of the terminal relative to the base station is calculated according to the first carrier deviation and the second carrier deviation.
The terminal may calculate the doppler shift of the terminal relative to the base station according to the formula [ 1 ] according to the first carrier deviation and the second carrier deviation. The formula [ 1 ] is as follows:
F Dopp ＝(E B +E A )/2 【1】
wherein F is Dopp Indicating Doppler shift of the terminal relative to the base station, E B Representing a second carrier deviation, E A Representing a first carrier deviation. E.g. terminal-acquired E B At 3kHz, E A For 2kHz, then, a doppler shift of 2.5kHz can be obtained by the above equation [ 1 ].
Optionally, the terminal adjusts the carrier frequency of the downlink signal received subsequently according to the calculated doppler shift, so that the difference between the carrier frequency of the signal sent by the base station received subsequently and the local carrier frequency is smaller, even 0.
In step 506, the actual carrier deviation of the terminal relative to the base station is calculated according to the first carrier deviation and the second carrier deviation.
The terminal may calculate the actual carrier deviation of the terminal relative to the base station according to the formula [ 2 ] according to the first carrier deviation and the second carrier deviation. The formula [ 2 ] is as follows:
F Err ＝(E B -E A )/2 【2】
Wherein F is Err Indicating Doppler shift of the terminal relative to the base station, E B Representing a second carrier deviation, E A Representing a first carrier deviation. E.g. terminal-acquired E B At 3kHz, E A For 2kHz, then, the actual carrier deviation is 0.5kHz, which can be obtained by the above equation [ 2 ].
In one possible implementation, the above equations [ 1 ] and [ 2 ] may be obtained by establishing a system of equations that includes doppler shift and actual carrier bias, e.g., for a first carrier bias, having the following calculation formula: e (E) A ＝-F Err +F Dopp The method comprises the steps of carrying out a first treatment on the surface of the For the second carrier deviation, it has the following calculation formula: e (E) B ＝F Err +F Dopp The method comprises the steps of carrying out a first treatment on the surface of the Then, the terminal may establish an equation set for the calculation formulas of the first carrier deviation and the second carrier deviation, and solve the equation set to obtain the formula [ 1 ] and the formula [ 2 ], so as to implement the calculation of the actual carrier deviation and the doppler shift by the formula [ 1 ] and the formula [ 2 ].
And step 507, adjusting the crystal oscillator of the terminal according to the actual carrier deviation.
Optionally, the terminal may adjust the reference frequency of the crystal oscillator in the terminal according to the actual carrier deviation obtained by the calculation, so as to adjust the clock frequency, so that the clock frequency of the terminal is closer to the clock frequency of the base station.
In summary, the method and the device can enable the terminal to acquire the Doppler frequency shift between the terminal and the base station caused by movement of the terminal, and adjust the carrier frequency of the downlink signal received by the terminal according to the Doppler frequency shift, so that inaccuracy of timing caused by directly adjusting the carrier frequency of the downlink signal according to deviation between the carrier frequency of the terminal and the carrier frequency of the signal transmitted by the base station or directly adjusting the reference frequency of the crystal oscillator is avoided, and accuracy of time-frequency synchronization between the terminal and the base station is improved.
In addition, the method and the device can calculate the actual carrier deviation of the terminal relative to the base station according to the obtained first carrier deviation and the second carrier deviation, and adjust the crystal oscillator of the terminal according to the actual carrier deviation, so that accuracy of adjusting the reference frequency of the crystal oscillator by the terminal is improved.
In one possible implementation manner, the terminal may also establish communication connections with multiple base stations, and the terminal may send uplink signals to each base station that establishes a communication connection, or may receive signals sent by each base station. Under the condition, the terminal can also calculate the respective actual carrier deviation of the terminal relative to at least two base stations, and acquire a carrier deviation combined value according to the respective actual carrier deviation of the terminal relative to at least two base stations; and adjusting the reference frequency of the crystal oscillator in the terminal according to the carrier deviation merging value.
In one possible implementation manner, according to the actual carrier deviation of the terminal relative to at least two base stations, an average value of the actual carrier deviation of the terminal relative to at least two base stations is obtained; and obtaining the average value as a carrier deviation combined value.
In one possible implementation manner, signal-to-noise ratios of downlink signals of at least two base stations are obtained;
and calculating a carrier deviation merging value according to the maximum ratio merging mode according to the actual carrier deviation of the terminal relative to at least two base stations and the signal to noise ratio of the downlink signals of the at least two base stations.
That is, when a terminal communicates with a plurality of base stations at the same time, it can be determined according to each F between itself and the plurality of base stations Err Calculating carrier deviation combined value F' Err Carrier deviation combined value F' Err By providing a plurality of base stations with a plurality of base stations, each base station having a different frequency Err The average value may be calculated, or may be obtained by combining the maximum ratio according to the signal to noise ratio of each base station signal, which is not limited in the embodiment of the present application. Can be used forOptionally, the resulting carrier deviation combined value F' Err The method can be used for adjusting the reference frequency of the terminal crystal oscillator; doppler shift of terminal relative to each base station and residual actual carrier deviation value F Er -F’ Err Can be used for the correction of the carrier frequency of the downlink signal of the individual base stations.
In one possible implementation manner, taking the mobile phone as the terminal, the mobile phone communicates with a single base station as an example, a processing flow of the doppler shift and the actual carrier deviation of the mobile phone relative to the base station in the mobile phone in this application may be shown in the following figure. Referring to fig. 6, a schematic diagram of a mobile phone structure according to an exemplary embodiment of the present application is shown. As shown in fig. 6, the device comprises a crystal oscillator module 601, a radio frequency module 602, a frequency offset separation module 603, a baseband module 604 and an adjustment module 605.
Wherein, the crystal oscillator module 601 is configured to provide a reference frequency for each module, the radio frequency module 602 may be configured to receive a signal sent by a base station, and the frequency offset separation module 603 may be configured to obtain a first carrier deviation E A And a second carrier deviation E B Calculating to obtain Doppler frequency shift F Dopp Actual carrier deviation F Err And the calculated doppler shift is transferred to the adjusting module 605, so as to adjust the carrier frequency of the received downlink signal, and the frequency offset separating module 603 may also transfer the calculated actual carrier deviation to the crystal oscillator module 601, so as to adjust the reference frequency, thereby changing the clock frequency provided by the crystal oscillator module 601 to the baseband processor and the carrier frequency provided to the radio frequency module 602.
In one possible implementation, the terminal may also actively send a target request to the base station, through which the base station is instructed to send MAC signaling to itself. The embodiments shown in fig. 3, 4 and 5 described above are described below by way of example with respect to the interaction between a terminal and a base station.
Referring to fig. 7, a method flowchart of a frequency adjustment method according to an exemplary embodiment of the present application is shown. The method can be applied to the system of the terminal and the base station shown in the figure 1, and is executed by the terminal and the base station in the system. As shown in fig. 7, the frequency adjustment method may include the steps of:
in step 701, the first terminal sends a target request to the base station in response to the current carrier deviation being greater than the deviation threshold, the current carrier deviation being used to indicate a deviation between a carrier frequency local to the current first terminal and a carrier frequency of a signal received by the first terminal and sent by the base station, the target request being used to indicate the base station to send MAC signaling.
That is, the first terminal may compare the current acquired carrier deviation with the deviation threshold, and if the current carrier deviation is greater than the deviation threshold, it indicates that the deviation between the local carrier frequency and the carrier frequency of the signal sent by the base station is too large at this time, and needs to be adjusted, and then the first terminal may send the target request to the base station. Alternatively, the deviation threshold may be set in advance in the first terminal by the developer. For example, the magnitude of the deviation threshold is 200kHz, and if the first terminal calculates itself that the deviation between the local carrier frequency and the carrier frequency of the signal transmitted by the base station is 205kHz, the first terminal may transmit a target request to the base station.
In one possible implementation manner, the first terminal may further send the target request to the base station according to a preset period. That is, the first terminal actively transmits a target request to the base station after a period of time has elapsed. Alternatively, the preset period may be set in the first terminal by the developer, or the preset period may be transmitted to the terminal by the base station. For example, the time of the preset period is 3 minutes, and then the first terminal may send the target request to the base station every 3 minutes.
In one possible implementation manner, the base station may further include a first timer, and the base station may perform the step of acquiring the first carrier deviation in response to the time variation of the first timer being equal to the period duration of the preset period, that is, the base station may start timing after transmitting the MAC signaling carrying the first carrier deviation information once, acquire the first carrier deviation at this time again according to the above step when the time variation of the first timer is equal to the period duration of the preset period, and re-carry the first carrier deviation in the MAC signaling, so as to send the first carrier deviation to the terminal. For example, the preset period may take 3 minutes, which corresponds to the base station being able to actively send the MAC signaling containing the first carrier offset to the first terminal every three minutes. The preset period may be sent by the terminal to the base station, or the preset period is preset in the base station.
In step 702, a base station receives a target request sent by a first terminal.
In step 703, the base station acquires a first carrier deviation, where the first carrier deviation is used to indicate a deviation between a carrier frequency local to the base station and a carrier frequency of a signal received by the base station and sent by the first terminal.
In step 704, the base station carries the first carrier offset in MAC signaling.
In step 705, the base station sends MAC signaling to the first terminal.
And the first terminal calculates Doppler frequency shift of the first terminal relative to the base station according to the first carrier deviation carried in the MAC signaling.
In step 706, the first terminal receives the MAC signaling of the medium access control layer sent by the base station.
In step 707, the first terminal parses the MAC signaling to obtain the first carrier deviation.
In step 708, the first terminal obtains a second carrier deviation, where the second carrier deviation is used to indicate a deviation between a carrier frequency of the first terminal and a carrier frequency of a signal received by the first terminal and sent by the base station.
In step 709, the first terminal calculates the doppler shift and the actual carrier deviation of the first terminal relative to the base station according to the first carrier deviation and the second carrier deviation.
In step 710, the first terminal adjusts the frequency of the signal sent by the base station according to the doppler shift, and adjusts the crystal oscillator of the first terminal according to the actual carrier deviation.
Alternatively, the implementation manners of steps 706 to 710 may be as described in steps 501 to 507 in the embodiment shown in fig. 5, which is not described herein.
In summary, the method and the device can enable the terminal to acquire the Doppler frequency shift between the terminal and the base station caused by movement of the terminal, and adjust the carrier frequency of the downlink signal received by the terminal according to the Doppler frequency shift, so that inaccuracy of timing caused by directly adjusting the carrier frequency of the downlink signal according to deviation between the carrier frequency of the terminal and the carrier frequency of the signal transmitted by the base station or directly adjusting the reference frequency of the crystal oscillator is avoided, and accuracy of time-frequency synchronization between the terminal and the base station is improved.
The following are device embodiments of the present application, which may be used to perform method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.
Referring to fig. 8, a block diagram of a frequency adjustment device according to an exemplary embodiment of the present application is shown. The frequency adjustment device 800 may be used in a terminal to perform all or part of the steps performed by the terminal in the methods provided by the embodiments shown in fig. 3, 5 and 7. The frequency adjustment apparatus 800 may include: a first acquisition module 801, a second acquisition module 802, a doppler shift calculation module 803, and a frequency adjustment module 804.
A first obtaining module 801, configured to obtain a first carrier deviation, where the first carrier deviation is used to indicate a deviation between a carrier frequency local to a base station and a carrier frequency of a signal received by the base station and sent by the terminal;
a second obtaining module 802, configured to obtain a second carrier deviation, where the second carrier deviation is used to indicate a deviation between a carrier frequency local to the terminal and a carrier frequency of a signal received by the terminal and sent by the base station;
a doppler shift calculation module 803, configured to calculate a doppler shift of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
and the frequency adjustment module 804 is configured to perform frequency adjustment on a signal sent by a subsequent received base station according to the doppler shift.
In summary, the method and the device can enable the terminal to acquire the Doppler frequency shift between the terminal and the base station caused by movement of the terminal, and adjust the carrier frequency of the downlink signal received by the terminal according to the Doppler frequency shift, so that inaccuracy of timing caused by directly adjusting the carrier frequency of the downlink signal according to deviation between the carrier frequency of the terminal and the carrier frequency of the signal transmitted by the base station or directly adjusting the reference frequency of the crystal oscillator is avoided, and accuracy of time-frequency synchronization between the terminal and the base station is improved.
Optionally, the first obtaining module 801 includes: a first receiving unit and a first acquiring unit;
the first receiving unit is configured to receive a MAC signaling of a medium access control layer sent by a base station, where the MAC signaling includes the first carrier deviation observed by the base station;
the first obtaining unit is configured to parse the MAC signaling and obtain the first carrier deviation.
Optionally, the apparatus further includes: a first transmission module or a second transmission module;
the first sending module is configured to send, before the first receiving unit receives a MAC signaling of a medium access control layer sent by a base station, a target request to the base station in response to a current carrier deviation being greater than a deviation threshold, where the current carrier deviation is used to indicate a deviation between a carrier frequency local to the terminal and a carrier frequency of a signal received by the terminal and sent by the base station, and the target request is used to indicate the base station to send the MAC signaling;
the second sending module is configured to send the target request to the base station according to a preset period, where the preset period is sent to the terminal by the base station, or the preset period is preset in the terminal.
Optionally, the apparatus further includes:
the actual deviation calculation module is used for calculating the actual carrier deviation of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
and the reference frequency adjusting module is used for adjusting the reference frequency of the crystal oscillator in the terminal according to the actual carrier deviation.
Optionally, the terminal establishes a communication connection with at least two base stations, and the apparatus further includes:
the first calculation module is used for calculating the actual carrier deviation of the terminal relative to each of the at least two base stations;
the first acquisition module is used for acquiring a carrier deviation combined value according to the actual carrier deviation of the terminal relative to the at least two base stations;
the reference frequency adjusting module is used for adjusting the reference frequency of the crystal oscillator in the terminal according to the carrier deviation merging value.
Optionally, the first acquisition module includes: a second acquisition unit and a third acquisition unit;
the second obtaining unit is configured to obtain an average value of the actual carrier deviations of the terminal relative to the at least two base stations according to the actual carrier deviations of the terminal relative to the at least two base stations;
The third obtaining unit is configured to obtain the average value as the carrier deviation combined value.
Optionally, the first acquisition module includes: a fourth acquisition unit and a first calculation unit;
the fourth obtaining unit is configured to obtain signal-to-noise ratios of the downlink signals of the at least two base stations;
the first calculating unit is configured to calculate the carrier deviation combining value according to a maximum ratio combining mode according to an actual carrier deviation of the terminal relative to the at least two base stations and a signal-to-noise ratio of downlink signals of the at least two base stations.
Optionally, the second obtaining module 802 is configured to calculate the second carrier deviation according to the received signal sent by the base station.
Referring to fig. 9, a block diagram of a frequency adjustment device according to an exemplary embodiment of the present application is shown. The frequency adjustment device 900 may be used in a terminal to perform all or part of the steps performed by a base station in the methods provided by the embodiments shown in fig. 4, 5 and 7. The frequency adjustment apparatus 900 may include: a third acquisition module 901, an addition module 902 and a signaling transmission module 903.
The third obtaining module 901 is configured to obtain a first carrier deviation, where the first carrier deviation is used to indicate a deviation between a carrier frequency local to the base station and a carrier frequency of a signal received by the base station and sent by a first terminal;
The adding module 902 is configured to carry the first carrier offset in a MAC signaling of a MAC layer;
the signaling sending module 903 is configured to send the MAC signaling to the first terminal, so that the first terminal calculates a doppler shift of the first terminal relative to the base station according to the first carrier deviation carried in the MAC signaling.
Optionally, the apparatus further comprises:
a request receiving module, configured to receive, before the signaling sending module 903 sends the target signaling to the first terminal, a target request sent by the first terminal, where the target request is used to instruct the base station to send the MAC signaling.
Optionally, the base station includes a first timer, and the third obtaining module 901 is configured to perform the step of obtaining the first carrier deviation in response to a time variation of the first timer being equal to a period duration of a preset period, where the preset period is sent by a terminal to the base station, or the preset period is preset in the base station.
Referring to fig. 10, a schematic structural diagram of a computer device according to an exemplary embodiment of the present application is shown. The computer device 1000 may include: a processor 1001, a receiver 1002, a transmitter 1003, a memory 1004, and a bus 1005.
The processor 1001 includes one or more processing cores, and the processor 1001 executes various functional applications and information processing by running software programs and modules.
The receiver 1002 and the transmitter 1003 may be implemented as one communication component, which may be a communication chip. The communication chip may also be referred to as a transceiver.
The memory 1004 is connected to the processor 1001 through a bus 1005.
The memory 1004 may be used for storing a computer program for execution by the processor 1001 to perform the steps performed by the computer device in the method embodiments described above.
Further, the memory 1004 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, including but not limited to: magnetic or optical disk, electrically erasable programmable Read-Only Memory (EEPROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), static random access Memory (Static Random Access Memory, SRAM), read Only Memory (ROM), magnetic Memory, flash Memory, programmable Read-Only Memory (Programmable Read Only Memory, PROM).
In an exemplary embodiment, the computer device includes a processor and a memory;
the processor is configured to provide a processor configured to,
acquiring a first carrier deviation, wherein the first carrier deviation is used for indicating the deviation between the local carrier frequency of a base station and the carrier frequency of a signal sent by the terminal received by the base station;
acquiring a second carrier deviation, wherein the second carrier deviation is used for indicating the deviation between the local carrier frequency of the terminal and the carrier frequency of the signal sent by the base station received by the terminal;
calculating Doppler frequency shift of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
and according to the Doppler frequency shift, carrying out frequency adjustment on the signal transmitted by the subsequent received base station.
In one possible implementation, the processor is configured to,
receiving a media access control layer (MAC) signaling sent by a base station, wherein the MAC signaling comprises the first carrier deviation observed by the base station;
and analyzing the MAC signaling to acquire the first carrier deviation.
In one possible implementation, the processor is further configured to,
before receiving a media access control layer (MAC) signaling sent by a base station, responding to that the current carrier deviation is larger than a deviation threshold value, sending a target request to the base station, wherein the current carrier deviation is used for indicating the deviation between the current carrier frequency of the terminal and the carrier frequency of a signal received by the terminal and sent by the base station, and the target request is used for indicating the base station to send the MAC signaling; or alternatively, the process may be performed,
And sending the target request to the base station according to a preset period, wherein the preset period is sent to the terminal by the base station, or the preset period is preset in the terminal.
In one possible implementation, the processor is further configured to,
calculating the actual carrier deviation of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
and adjusting the reference frequency of the crystal oscillator in the terminal according to the actual carrier deviation.
In one possible implementation, the processor is further configured to,
calculating the actual carrier deviation of the terminal relative to each of the at least two base stations;
acquiring a carrier deviation merging value according to respective actual carrier deviation of the terminal relative to the at least two base stations;
and adjusting the reference frequency of the crystal oscillator in the terminal according to the actual carrier deviation, wherein the adjusting comprises the following steps:
and adjusting the reference frequency of the crystal oscillator in the terminal according to the carrier deviation merging value.
In one possible implementation, the processor is configured to,
according to the actual carrier deviation of the terminal relative to the at least two base stations, acquiring an average value of the actual carrier deviation of the terminal relative to the at least two base stations;
And obtaining the average value as the carrier deviation combined value.
In one possible implementation, the processor is configured to,
acquiring signal-to-noise ratios of respective downlink signals of the at least two base stations;
and calculating the carrier deviation merging value according to the maximum ratio merging mode according to the actual carrier deviation of the terminal relative to the at least two base stations and the signal to noise ratio of the downlink signals of the at least two base stations.
In one possible implementation, the processor is configured to,
and calculating the second carrier deviation according to the received signal sent by the base station.
Referring to fig. 11, a schematic structural diagram of a base station according to an exemplary embodiment of the present application is shown. The base station 1100 may include: a processor 1101, a receiver 1102, a transmitter 1103, a memory 1104 and a bus 1105.
The processor 1101 includes one or more processing cores, and the processor 1101 executes various functional applications and information processing by running software programs and modules.
The receiver 1102 and the transmitter 1103 may be implemented as one communication component, which may be a communication chip. The communication chip may also be referred to as a transceiver.
The memory 1104 is connected to the processor 1101 through a bus 1105.
The memory 1104 may be used for storing a computer program, and the processor 1101 is used for executing the computer program to implement the steps performed by the base station in the above-described method embodiment.
Further, the memory 1104 may be implemented by any type or combination of volatile or nonvolatile memory devices including, but not limited to: magnetic or optical disk, electrically erasable programmable Read-Only Memory (EEPROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), static random access Memory (Static Random Access Memory, SRAM), read Only Memory (ROM), magnetic Memory, flash Memory, programmable Read-Only Memory (Programmable Read Only Memory, PROM).
In an exemplary embodiment, the base station includes a processor and a memory;
the processor is configured to provide a processor configured to,
acquiring a first carrier deviation, wherein the first carrier deviation is used for indicating the deviation between the local carrier frequency of the base station and the carrier frequency of a signal sent by a first terminal received by the base station;
Carrying the first carrier deviation in a media access control layer (MAC) signaling;
and sending the MAC signaling to the first terminal, so that the first terminal calculates Doppler frequency shift of the first terminal relative to the base station according to the first carrier deviation carried in the MAC signaling.
Optionally, the processor is further configured to, before sending the target signaling to the first terminal, receive a target request sent by the first terminal, where the target request is used to instruct the base station to send the MAC signaling.
Optionally, the base station includes a first timer, and the processor is configured to execute the step of acquiring the first carrier deviation in response to a time variation of the first timer being equal to a period duration of a preset period, where the preset period is sent to the base station by a terminal, or the preset period is preset in the base station.
Embodiments of the present application also provide a computer readable medium storing at least one instruction, where the at least one instruction is loaded and executed by the processor to implement all or part of the steps performed by a terminal or a base station in the frequency adjustment method according to the above embodiments.
Embodiments of the present application also provide a computer program product comprising computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the frequency adjustment method provided in the various alternative implementations of the above embodiments.
It should be noted that: the frequency adjustment device provided in the above embodiment is only exemplified by the above embodiments when executing the above frequency adjustment method, and in an actual program, the above function allocation may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the functions described above. In addition, the apparatus and the method embodiments provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the apparatus and the method embodiments are detailed in the method embodiments and are not repeated herein.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The foregoing description of the preferred embodiments is provided for the purpose of illustration only and is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (16)
1. A method of frequency adjustment, the method being performed by a terminal, the method comprising:
acquiring a first carrier deviation, wherein the first carrier deviation is used for indicating the deviation between the local carrier frequency of a base station and the carrier frequency of a signal sent by the terminal received by the base station;
acquiring a second carrier deviation, wherein the second carrier deviation is used for indicating the deviation between the local carrier frequency of the terminal and the carrier frequency of the signal sent by the base station received by the terminal;
calculating Doppler frequency shift of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
according to the Doppler frequency shift, carrying out frequency adjustment on the signal sent by the base station which is subsequently received;
calculating the actual carrier deviation of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
and adjusting the crystal oscillator of the terminal according to the actual carrier deviation, wherein the carrier frequency of the terminal is obtained by multiplying the frequency of the reference frequency of the crystal oscillator.
2. The method of claim 1, wherein the obtaining the first carrier offset comprises:
receiving a media access control layer (MAC) signaling sent by a base station, wherein the MAC signaling comprises the first carrier deviation observed by the base station;
and analyzing the MAC signaling to acquire the first carrier deviation.
3. The method of claim 2, further comprising, prior to the receiving the medium access control layer MAC signaling sent by the base station:
transmitting a target request to the base station in response to the current carrier deviation being greater than a deviation threshold, the current carrier deviation being used to indicate a deviation between a current carrier frequency local to the terminal and a carrier frequency of a signal received by the terminal from the base station, the target request being used to indicate the base station to transmit the MAC signaling; or alternatively, the process may be performed,
and sending the target request to the base station according to a preset period, wherein the preset period is sent to the terminal by the base station, or the preset period is preset in the terminal.
4. The method of claim 1, wherein the terminal establishes a communication connection with at least two base stations, the method further comprising:
Calculating the actual carrier deviation of the terminal relative to each of the at least two base stations;
acquiring a carrier deviation merging value according to respective actual carrier deviation of the terminal relative to the at least two base stations;
and adjusting the crystal oscillator of the terminal according to the actual carrier deviation, including:
and adjusting the crystal oscillator of the terminal according to the carrier deviation merging value.
5. The method according to claim 4, wherein the obtaining the carrier deviation combination value according to the actual carrier deviation of the terminal with respect to each of the at least two base stations includes:
according to the actual carrier deviation of the terminal relative to the at least two base stations, acquiring an average value of the actual carrier deviation of the terminal relative to the at least two base stations;
and obtaining the average value as the carrier deviation combined value.
6. The method according to claim 4, wherein the obtaining the carrier deviation combination value according to the actual carrier deviation of the terminal with respect to each of the at least two base stations includes:
acquiring signal-to-noise ratios of respective downlink signals of the at least two base stations;
And calculating the carrier deviation merging value according to the maximum ratio merging mode according to the actual carrier deviation of the terminal relative to the at least two base stations and the signal to noise ratio of the downlink signals of the at least two base stations.
7. A method according to any one of claims 1 to 3, wherein said obtaining a second carrier offset comprises:
and calculating the second carrier deviation according to the received signal sent by the base station.
8. A method of frequency adjustment, the method performed by a base station, the method comprising:
acquiring a first carrier deviation, wherein the first carrier deviation is used for indicating the deviation between the local carrier frequency of the base station and the carrier frequency of a signal sent by a terminal received by the base station;
carrying the first carrier deviation in a media access control layer (MAC) signaling;
transmitting the MAC signaling to the terminal so that the terminal calculates Doppler frequency shift of the terminal relative to the base station according to the first carrier deviation carried in the MAC signaling, and the first carrier deviation calculates actual carrier deviation of the terminal relative to the base station; and adjusting the crystal oscillator of the terminal according to the actual carrier deviation, wherein the carrier frequency of the terminal is obtained by multiplying the frequency of the reference frequency of the crystal oscillator.
9. The method of claim 8, further comprising, prior to transmitting the MAC signaling to the terminal:
and receiving a target request sent by the terminal, wherein the target request is used for indicating the base station to send the MAC signaling.
10. The method of claim 8 wherein the base station includes a first timer, and wherein the obtaining the first carrier offset comprises:
and executing the step of acquiring the first carrier deviation in response to the time variation of the first timer being equal to a period duration of a preset period, wherein the preset period is sent to the base station by a terminal or the preset period is preset in the base station.
11. A frequency adjustment device, wherein the device is used in a terminal, the device comprising:
the first acquisition module is used for acquiring a first carrier deviation, and the first carrier deviation is used for indicating deviation between the carrier frequency of the local base station and the carrier frequency of the signal sent by the terminal received by the base station;
the second acquisition module is used for acquiring a second carrier deviation, and the second carrier deviation is used for indicating the deviation between the local carrier frequency of the terminal and the carrier frequency of the signal sent by the base station received by the terminal;
The Doppler frequency shift calculation module is used for calculating the Doppler frequency shift of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
the frequency adjustment module is used for carrying out frequency adjustment on the signal sent by the base station which is subsequently received according to the Doppler frequency shift;
the actual deviation calculation module is used for calculating the actual carrier deviation of the terminal relative to the base station according to the first carrier deviation and the second carrier deviation;
and the reference frequency adjusting module is used for adjusting the crystal oscillator of the terminal according to the actual carrier deviation, and the carrier frequency of the terminal is obtained based on frequency multiplication of the reference frequency of the crystal oscillator.
12. A frequency adjustment device for use in a base station, the device comprising:
a third obtaining module, configured to obtain a first carrier deviation, where the first carrier deviation is used to indicate a deviation between a carrier frequency local to the base station and a carrier frequency of a signal received by the base station and sent by a terminal;
an adding module, configured to carry the first carrier deviation in a MAC signaling of a media access control layer;
a signaling sending module, configured to send the MAC signaling to the terminal, so that the terminal calculates a doppler shift of the terminal relative to the base station according to the first carrier deviation carried in the MAC signaling, and the first carrier deviation calculates an actual carrier deviation of the terminal relative to the base station; and adjusting the crystal oscillator of the terminal according to the actual carrier deviation, wherein the carrier frequency of the terminal is obtained by multiplying the frequency of the reference frequency of the crystal oscillator.
13. A computer device comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a set of codes, or a set of instructions, the at least one instruction, the at least one program, the set of codes, or the set of instructions being loaded and executed by the processor to implement the frequency adjustment method of any one of claims 1 to 7.
14. A computer device comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a set of codes, or a set of instructions, the at least one instruction, the at least one program, the set of codes, or the set of instructions being loaded and executed by the processor to implement the frequency adjustment method of any one of claims 8 to 10.
15. A computer readable storage medium having stored therein at least one instruction, at least one program, code set, or instruction set, the at least one instruction, the at least one program, the code set, or instruction set being loaded and executed by a processor to implement the frequency adjustment method of any of claims 1 to 7.
16. A computer readable storage medium having stored therein at least one instruction, at least one program, code set, or instruction set, the at least one instruction, the at least one program, the code set, or instruction set being loaded and executed by a processor to implement the frequency adjustment method of any of claims 8 to 10.
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| CN114189417B (en) * | 2021-12-07 | 2023-10-17 | 北京零壹空间电子有限公司 | Carrier frequency synchronization method, carrier frequency synchronization device, computer equipment and storage medium |
| CN115134905B (en) * | 2022-06-27 | 2023-12-01 | 国网青海省电力公司信息通信公司 | Frequency calibration method and device, nonvolatile storage medium and computer equipment |
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