CN112911701B

CN112911701B - Frequency offset control method and device, terminal and storage medium

Info

Publication number: CN112911701B
Application number: CN202110129798.XA
Authority: CN
Inventors: 吴大焰
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-06-21
Anticipated expiration: 2041-01-29
Also published as: WO2022161063A1; CN112911701A

Abstract

The application provides a frequency offset control method and device, a terminal and a storage medium, wherein the frequency offset control method comprises the following steps: after the auxiliary cell group is activated and enters a connected state, the main cell group adjusts a first numerical control oscillator according to the current frequency offset estimation information of the main cell group, and the auxiliary cell group adjusts a second numerical control oscillator according to the current frequency offset estimation information of the auxiliary cell group; when the difference value between the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator and the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator is larger than a set threshold value, triggering the master cell group to adjust the primary voltage-controlled oscillator to overcome the current frequency offset estimation of the master cell group; the asynchronous non-independent networking scene is a scene in which time offset information between a new air interface transmission signal and a long term evolution transmission signal is larger than the length of a cyclic prefix of the new air interface. By optimizing the adjustment and control strategies of frequency offset estimation values of MCG and SCG on VCO and NCO, the MSG frequency offset tracking performance of NSA is ensured, and the influence on SCG transceiving performance of NSA is reduced.

Description

Frequency offset control method and device, terminal and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a frequency offset control method and apparatus, a terminal, and a storage medium.

Background

In a New Radio (NR) and Long Term Evolution (LTE) Frequency offset control process of a Non-Standalone Networking (NSA) of a mobile communication terminal, NR and LTE both have respective Frequency offset adjustment amount and configuration timing, for example, only one Crystal Oscillator (CO) or Phase-locked loop (PLL) is used, and a Cyclic Prefix (CP) range of the NR and LTE overlaps with an internal part of an Orthogonal Frequency Division Multiplexing (OFDM) Symbol (Symbol), so that when Frequency offset adjustment is performed in the CP range of the NR and LTE, the transceiving performance of the counterpart is affected, and the NR and LTE Frequency offset control under NSA needs to be specifically processed.

In general, the conventional treatments are: one is to let the Master Cell Group (MCG) of the NSA adjust a Voltage Controlled Oscillator (VCO), and the other (SCG) adjusts a Numerically Controlled Oscillator (NCO). In the (E-UTRA NR dual connection with MCG using E-UTRA and SCG using NR, EN-DC), MCG LTE corrects the estimated frequency offset by adjusting VCO, SCG NR corrects the estimated frequency offset by adjusting NCO, and (E-UTRA NR dual connection with MCG using NR and SCG using E-UTRA, NE-DC) on the contrary has a large influence on the receiving and transmitting performance of SCG. The other is that both MCG and SCG only adjust NCO, but due to residual frequency offset on CO or PLL, NR scheduling granularity (Slot) or LTE Transmission Time Interval (TTI) length is not accurate, and long time accumulation introduces large time offset. In the prior art, a high-cost scheme of a dual-crystal oscillator/PLL is directly adopted, or the transceiving performance of the SCG is directly sacrificed, and even if the MCG and the SCG only adjust NCO, the problem of time offset introduced by residual frequency offset on the crystal oscillator/PLL still exists.

Disclosure of Invention

Embodiments of the present invention provide a frequency offset control method and apparatus, a terminal, and a storage medium, where adjustment and control policies of frequency offset estimation values of MCG and SCG on a VCO and an NCO may be optimally allocated by using the frequency offset control method, so that the influence on the SCG transceiving performance of NSA is reduced to the greatest extent while ensuring the MSG frequency offset tracking performance of NSA.

In a first aspect, an embodiment of the present application provides a frequency offset control method, including: acquiring time offset information between a new air interface transmission signal and a long-term evolution transmission signal under a non-independent networking; under the condition that the current scene is an asynchronous non-independent networking scene, periodically executing a first frequency offset control operation, wherein the first frequency offset control operation comprises the following steps: after the auxiliary cell group is activated and enters a connected state, the main cell group adjusts a first numerical control oscillator according to the current frequency offset estimation information of the main cell group, and the auxiliary cell group adjusts a second numerical control oscillator according to the current frequency offset estimation information of the auxiliary cell group; when the difference value between the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator and the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator is larger than a set threshold value, triggering the master cell group to adjust the voltage-controlled oscillator once to overcome the current frequency offset estimation of the master cell group; the asynchronous non-independent networking scene is a scene in which the time offset information between the new air interface transmission signal and the long term evolution transmission signal is greater than the length of the cyclic prefix of the new air interface.

Further, before the periodically performing the first frequency offset control operation, periodically performing a second frequency offset control operation, where the second frequency offset control operation includes: determining whether the secondary cell group enters a connected state; before the auxiliary cell group is activated and enters a connection state, the master cell group adjusts the voltage-controlled oscillator and/or the first numerical-controlled oscillator according to the current frequency offset estimation information of the master cell group, and the auxiliary cell group adjusts the second numerical-controlled oscillator according to the current frequency offset estimation information of the auxiliary cell group; wherein the first frequency offset control operation is triggered to be periodically executed after the secondary cell group is activated and enters a connected state.

Further, before the master cell group adjusting a first numerically controlled oscillator according to the current frequency offset estimation information of the master cell group and the auxiliary cell group adjusting a second numerically controlled oscillator according to the current frequency offset estimation information of the auxiliary cell group, the first frequency offset control operation further comprises: and storing the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator.

Further, the triggering the master cell group to adjust the voltage-controlled oscillator once to overcome the current frequency offset estimation of the master cell group when the difference between the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator and the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator is greater than a set threshold value comprises: acquiring the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator and the accumulated adjustment amount of the master cell group to the first numerical control oscillator; and calculating the difference value between the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator and the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator, if the difference value is greater than the set threshold value, the master cell group adjusts the voltage-controlled oscillator according to the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator, and clears the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator.

Further, before the periodically performing the second frequency offset control operation, the method further includes: determining whether time offset information between the new air interface transmission signal and the long term evolution transmission signal is greater than the length of the cyclic prefix of the new air interface; if the time bias information between the new air interface transmission signal and the long term evolution transmission signal is not greater than the length of the cyclic prefix of the new air interface, and it is determined that the current scene is a synchronous non-independent networking scene, a third frequency bias control operation is executed, where the third frequency bias control operation includes: the master cell group adjusts the voltage-controlled oscillator according to the current frequency offset estimation information of the master cell group; and the secondary cell group adjusting the second numerically controlled oscillator according to the current frequency offset estimate of the secondary cell group.

Further, the master cell group adjusting the voltage-controlled oscillator according to the current frequency offset estimation information of the master cell group includes: and the master cell group adjusts the voltage-controlled oscillator according to the current frequency offset estimation information of the master cell group only in the partial overlapping range of the cyclic prefixes of the master cell group and the auxiliary cell group.

Further, the adjusting, by the secondary cell group, the second numerically controlled oscillator according to the current frequency offset estimate for the secondary cell group comprises: and when the current adjustment operation of the second numerically controlled oscillator by the auxiliary cell group is adjacent to the adjustment of the voltage controlled oscillator by the main cell group, compensating the adjustment amount of the voltage controlled oscillator of the main cell group when the second numerically controlled oscillator is adjusted by the auxiliary cell group.

Further, compensating the voltage controlled oscillator for the master cell set when the secondary cell set adjusts the second voltage controlled oscillator comprises: performing an adjustment operation of the secondary cell group to the second numerically controlled oscillator using the following equation:

NCO actual adjustment quantity-SCG accumulated frequency offset estimation quantity-MCG accumulated VCO adjustment quantity

The actual NCO adjustment amount represents the current adjustment amount of the auxiliary cell group to the second numerically controlled oscillator, the SCG accumulated frequency offset estimation value represents the accumulated frequency offset estimation value of the auxiliary cell group, and the MCG accumulated VCO adjustment amount represents the accumulated adjustment amount of the master cell group to the voltage controlled oscillator.

In a second aspect, an embodiment of the present application further provides a frequency offset control apparatus, including: a processor and a memory, the memory being configured to store at least one instruction which, when loaded and executed by the processor, is configured to implement the frequency offset control method provided by the first aspect.

Further, the frequency offset control device may be a chip.

In a third aspect, an embodiment of the present application further provides a terminal, where the terminal includes a terminal body and the frequency offset control apparatus provided in the second aspect.

In a fourth aspect, an embodiment of the present application further provides a computer storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the frequency offset control method provided in the first aspect.

According to the technical scheme, when time offset information between a new air interface transmission signal and a long-term evolution transmission signal under a non-independent networking is obtained and a current scene is determined to be an asynchronous non-independent networking scene, a first frequency offset control operation is triggered to be periodically executed, specifically, the first frequency offset control operation comprises that after the auxiliary cell group is activated and enters a connected state, a master cell group adjusts a first numerical control oscillator according to current frequency offset estimation information of the master cell group, and the auxiliary cell group adjusts a second numerical control oscillator according to the current frequency offset estimation information of the auxiliary cell group; and when the difference value between the accumulated adjustment amount of the master cell group to the first numerically controlled oscillator and the accumulated adjustment amount of the master cell group to the voltage controlled oscillator is larger than a set threshold value, triggering the master cell group to adjust the voltage controlled oscillator once to overcome the current frequency offset estimation of the master cell group. By the technical scheme, the frequency of the VCO adjustment is limited, so that on one hand, the time-frequency offset performance of the MCG is basically not influenced, and on the other hand, the influence of the VCO adjustment on the SCG can be reduced to the maximum extent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram illustrating a process for determining a frequency offset control operation according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating a partial overlap range of a cyclic prefix in an EN-DC mode according to an embodiment of the present application;

fig. 3 is a flowchart illustrating a frequency offset control operation in an asynchronous NSA scenario according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a frequency offset control apparatus according to another embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In existing processing operations: when frequency offset control of NR and LTE is carried out under NSA, one method is to directly adopt two crystal oscillators or two PLLs, so that the frequency offset control of NR and LTE is not mutually constrained, but the defect is that the cost is higher; the other method only adopts a crystal oscillator or PLL, and leads the MCG of the NSA to adjust the VCO, and the other SCG to adjust the NCO, particularly for the EN-DC, the LTE adjusts the VCO, the NR adjusts the NCO, and the NE-DC vice versa, but the defect is that the receiving and transmitting performance of the SCG is greatly influenced; the other is that the NR and LTE only adjust NCO, and the defect is that the residual frequency offset on a crystal oscillator or PLL can cause the length of a Slot of NR or a TTI of LTE to be inaccurate, thereby introducing time offset.

In order to solve the above technical problems in the existing operation, the frequency offset control method provided in the embodiment of the present application can optimize the frequency offset control strategy of NR and LTE under NSA, and the main focus is to obtain better NR and LTE frequency offset tracking performance at lower cost for the frequency offset control strategy of NR and LTE under EN-DC/NE-DC.

According to the 3GPP protocol 38.101-3, section 6.4b.1, the frequency deviation between the UE carrier frequency and the base station carrier frequency of LTE and NR under NSA needs to satisfy the requirements of the respective protocols, that is: neither can exceed +/-0.1PPM, so NR and LTE need to be adjusted as soon as possible when estimating the frequency offset, and in order to avoid the influence of the frequency offset instability section when adjusting the VCO, the adjustment of the VCO by the LTE and the NR is carried out in the respective CP range. However, according to the description of section 7.6 of 3GPP protocol 38.133, the time bias is maximum 33us in the synchronization scenario, and when the sub-carrier bandwidth (SCS) of NR is 15KHz, it is 0.5 Symbol; and 1 Symbol when SCS is 30 KHz. Indicating that even if synchronized, Timing deviation of LTE and NR may exceed CP protection. In NSA, LTE and NR are simultaneously in a connected state, and LTE and NR transmit and receive are performed simultaneously, and then adjustment of VCO by any mode may affect the ongoing transmission and reception of another mode.

In order to avoid the above influence, it is necessary to refine the distinction between the synchronous and asynchronous scenes, and specifically, in the frequency offset control method provided in the embodiment of the present application, the synchronous and asynchronous scenes may be divided according to a preset method to determine that the current scene is a synchronous NSA scene or an asynchronous NSA scene.

Fig. 1 is a schematic diagram of a process of determining a frequency offset control operation according to an embodiment of the present application, as shown in fig. 1, the process of determining a frequency offset control operation includes the following steps:

step 101: and acquiring time offset information between a new air interface transmission signal and a long-term evolution transmission signal under the non-independent networking.

Step 102: determining whether the time offset information between the new air interface transmission signal and the long term evolution transmission signal is greater than the length of the cyclic prefix of the new air interface, if not, entering step 103, and if so, entering step 104.

Since the subcarrier spacing of LTE is fixed at 15KHz and the SCS of NR is greater than 15KHz, the CP length of NR is only less than or equal to that of LTE. Further, in the determination of the synchronous scenario or asynchronous scenario of NR and LTE, the time offset information (absolute value of Timing offset between NR and LTE) between the new air interface transmission signal and the long term evolution transmission signal may be directly compared with the length of the cyclic prefix of the new air interface (CP length of NR), and if the time offset information is greater than the CP length of NR, the new air interface transmission signal is an asynchronous scenario, and if the time offset information is not greater than the CP length of NR, the new air interface transmission signal is a synchronous scenario.

Step 103: and determining that the current scene is a synchronous non-independent networking scene (synchronous NSA scene), and performing synchronous NSA frequency offset control operation (including third frequency offset control operation).

After the synchronous scene or the asynchronous scene of the NR and the LTE in step 102 is determined, if the absolute value of Timing deviation between the NR and the LTE is not greater than the CP length of the NR, the current scene is a synchronous NSA scene.

In NSA mode, EN-DC deployment mode and NE-DC deployment mode can be included. Wherein DC represents Dual Connectivity, i.e. Dual Connectivity; e represents E-UTRA, namely a 4G wireless access network; n stands for NR, i.e. 5G new radio. In the EN-DC deployment mode, an NR terminal is connected with a 4G core network, a 4G base station is a main station, namely a Main Cell Group (MCG) uses E-UTRA, and a 5G base station is a secondary station, namely a Secondary Cell (SCG) group uses NR. In the NE-DC deployment mode, an NR terminal is connected with a 5G core network, a 5G base station is a main station, namely a Main Cell Group (MCG) uses NR, and a 4G base station is a secondary station, namely a Secondary Cell Group (SCG) uses E-UTRA.

Further, in the NSA mode, the absolute value of Timing deviation between NR and LTE is not greater than the CP length of NR, that is, the absolute value of Timing deviation between MCG and SCG is within the range of CP length of NR. Since the Transmission Time Interval (TTI) of LTE is 1ms, the MCG and SCG have only one pair of CPs partially overlapping (Overlap) within 1 ms. Considering that the MCG priority of NSA is highest, the adjustment Voltage Controlled (VCO) is now controlled only by MCG. The VCO described in the embodiments of the present application is specifically a Crystal Oscillator (CO) or a Phase Locked Loop (PLL).

Specifically, when it is determined that the current scenario is a synchronous non-independent networking scenario, a third frequency offset control operation is performed, where the third frequency offset control operation includes: the MCG adjusts the VCO according to the current frequency offset estimation information of the MCG, and the SCG may adjust the second NCO, i.e., the NCO on the SCG side, according to the current frequency offset estimation of the SCG.

To avoid the MCG adjusting VCO from affecting the SCG, the MCG adjusts the VCO according to the current frequency offset estimation information of the MCG only within the partial overlapping range of the cyclic prefixes of both the MCG and the SCG. For distance, as shown in fig. 2, the partial overlapping range of the cyclic prefix in the EN-DC mode is schematically shown, in the N-DC deployment mode, MCG is LTE, SCG is NR with SCS of 30KHz, and LTE can only adjust the VCO within the range of the overlay CP (201).

In the synchronous non-independent networking scenario, the SCG adjusts only the second NCO according to the estimated frequency offset value, but the SCG needs to adjust the NCO for Rx (receive direction) and Tx (transmit direction). When the current adjustment operation of the SCG on the second NCO is adjacent to the MCG adjustment VCO, the adjustment amount of the MCG on the VCO needs to be compensated when the SCG adjusts the second NCO.

Specifically, when the SCG currently adjusts the second NCO by the SCG is adjacent to the MCG adjusting VCO, the SCG may adjust the second NCO according to the following formula to compensate the adjustment amount of the VCO by the MCG:

The actual NCO adjustment amount represents the current adjustment amount of the SCG to the second NCO, the SCG accumulated frequency offset estimation value represents the accumulated frequency offset estimation value of the SCG, and the MCG accumulated VCO adjustment amount represents the accumulated adjustment amount of the MCG to the VCO.

The above describes the scene processing of the Timing deviation of NR and LTE within the NR CP range, and when the Timing deviation exceeds the CP range, the adjustment of the VCO by the MCG will affect the first Symbol received and transmitted by the SCG, and at this time, the asynchronous NSA frequency offset control operation is adopted.

Step 104: determining that the current scene is an asynchronous dependent networking scene (asynchronous NSA scene), and performing asynchronous NSA frequency offset control operation (including a first frequency offset control operation and a second frequency offset control operation).

Fig. 3 is a flow chart of a frequency offset control operation in an asynchronous NSA scenario according to an embodiment of the present application, where as shown in fig. 3, the flow chart of the frequency offset control operation in the asynchronous NSA scenario includes the following steps:

step 301: determining whether the SCG enters a connected state, and if the SCG is activated and does not enter the connected state, executing step 302; if the SCG is active and enters the connected state, step 303 is performed.

Step 302: the MCG adjusts the VCO and/or the first NCO according to the current frequency offset estimation information of the MCG, the SCG adjusts the second NCO according to the current frequency offset estimation information of the SCG, and the step 301 is returned.

In an asynchronous NSA scenario, and when the SCG is activated and does not enter a connected state, the MCG performs frequency offset control in a manner that frequency offset control is performed only by adjusting the VCO, only by adjusting the second NCO, or by adjusting the VCO and the second NCO.

However, in an asynchronous NSA scenario, and SCG is active and not entering the connected state phase, SCG adjusts only the second NCO.

Step 303: and saving the accumulated adjustment amount of the VCO by the MCG, and enabling the MCG and the SCG to enter a stage of only adjusting the NCO.

After the SCG is activated and enters a connection state, the MCG and the SCG enter a stage of only adjusting NCO, the MCG adjusts the first NCO according to the current frequency offset estimation information of the MCG, and the SCG adjusts the second NCO according to the current frequency offset estimation information of the SCG.

Step 304: and calculating a difference value between the accumulated adjustment amount of the first NCO by the MCG and the accumulated adjustment amount of the VCO by the MCG, determining whether the difference value is greater than a set threshold value, executing the step 305 if the difference value is greater than the set threshold value, and returning to the step 303 if the difference value is not greater than the set threshold value.

After the accumulated adjustment amount of the VCO by the MCG and the accumulated adjustment amount of the first NCO by the MCG are obtained, a difference between the accumulated adjustment amount of the first NCO by the MCG and the accumulated adjustment amount of the VCO by the MCG is calculated.

Step 305: and the MCG adjusts the VCO once according to the accumulated adjustment quantity of the first NCO by the MCG, clears the accumulated adjustment quantity of the first NCO by the MCG and returns to the step 303.

And the MCG only adjusts the first NCO before the difference value between the accumulated adjustment quantity of the first NCO by the MCG and the accumulated adjustment quantity of the VCO by the MCG is larger than a set threshold value. After the difference value between the accumulated adjustment quantity of the MCG to the first NCO and the accumulated adjustment quantity of the MCG to the VCO is larger than a set threshold value, the MCG cancels the accumulated adjustment quantity of the MCG to the first NCO through adjustment of the VCO at one time, and clears the accumulated adjustment quantity of the MCG to the first NCO, so that the adjustment frequency of the MCG to the VCO is limited, the time-frequency offset performance of the MCG is basically not influenced, and the influence of the VCO adjustment on the SCG can be reduced to the maximum extent.

In the asynchronous NSA frequency offset control operation, the adjustment of the first NCO by the MCG and the adjustment of the second NCO by the SCG both require the simultaneous adjustment of the NCO in the transmitting direction and the NCO in the receiving direction.

The setting of the threshold value may be selected and set through scene analysis, and may be based on, but not limited to, tolerance and performance requirements of the system. For example: the MCG cell center frequency point is set to 0.02ppm, and 2000 × 0.02 to 40Hz when the MCG cell center frequency point is 2 GHz.

In summary, the frequency offset adjustment strategy for MCG and SCG of asynchronous NSA limits the frequency adjusted by the VCO, so that on one hand, the time-frequency offset performance of MCG is not affected, and on the other hand, the influence of VCO adjustment on SCG can be reduced to the maximum extent.

Through the processing of the above four steps (step 101 to step 104), the influence on the SCG transceiving performance of the NSA can be reduced to the maximum extent while the MSG frequency offset tracking performance of the NSA is ensured, synchronous and asynchronous NSAs are supported, and the method is applicable to all scenarios (including EN-DC/NE-DC and the like) of the NSA.

Fig. 4 is a schematic structural diagram of a frequency offset control apparatus according to another embodiment of the present application, and as shown in fig. 4, the apparatus may include a processor 401 and a memory 402, where the memory 402 is used to store at least one instruction, and the instruction is loaded and executed by the processor 401 to implement the frequency offset control method according to the foregoing embodiment.

In one implementation, the frequency offset control apparatus may be a chip, that is, the chip may include a processor 401 and a memory 402, where the memory 402 is used to store at least one instruction, and the instruction is loaded and executed by the processor 401 to implement the frequency offset control method provided in the foregoing embodiment.

An embodiment of the present application further provides a terminal, where the terminal includes a terminal body and the frequency offset control apparatus provided in the embodiment shown in fig. 4. The terminal (NR terminal) may be but is not limited to a smartphone. The chip provided by the embodiment shown in fig. 4 may be built in the NR terminal, and the NR terminal with the chip built therein may implement frequency offset control by the frequency offset control method provided by the above embodiment, and by limiting the frequency adjusted by the VCO, on one hand, the time-frequency offset performance of the MCG is not substantially affected, and on the other hand, the influence of the VCO adjustment on the SCG may be reduced to the maximum extent.

The embodiment of the present application further provides a computer storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the frequency offset control method provided by the foregoing embodiment may be implemented.

It should be understood that the application may be an application program (native app) installed on the terminal, or may also be a web page program (webApp) of a browser on the terminal, which is not limited in this embodiment of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or in the form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of frequency offset control, the method comprising:

acquiring time offset information between a new air interface transmission signal and a long-term evolution transmission signal under a non-independent networking;

under the condition that the current scene is an asynchronous non-independent networking scene, periodically executing a first frequency offset control operation, wherein the first frequency offset control operation comprises the following steps:

after the auxiliary cell group is activated and enters a connected state, the main cell group adjusts a first numerical control oscillator according to the current frequency offset estimation information of the main cell group, and the auxiliary cell group adjusts a second numerical control oscillator according to the current frequency offset estimation information of the auxiliary cell group; and

when the difference value between the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator and the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator is larger than a set threshold value, triggering the master cell group to adjust the voltage-controlled oscillator once to overcome the current frequency offset estimation of the master cell group;

the asynchronous non-independent networking scene is a scene in which the time offset information between the new air interface transmission signal and the long term evolution transmission signal is greater than the length of the cyclic prefix of the new air interface.

2. The method of claim 1, wherein prior to said periodically performing the first frequency offset control operation, further comprising periodically performing a second frequency offset control operation, said second frequency offset control operation comprising:

determining whether the secondary cell group enters a connected state; and

before the auxiliary cell group is activated and enters a connected state, the master cell group adjusts the voltage-controlled oscillator and/or the first numerically-controlled oscillator according to the current frequency offset estimation information of the master cell group, and the auxiliary cell group adjusts the second numerically-controlled oscillator according to the current frequency offset estimation information of the auxiliary cell group;

and triggering to periodically execute the first frequency offset control operation after the secondary cell group is activated and enters a connected state.

3. The method of claim 1, wherein the first frequency offset control operation further comprises, before the master cell group adjusting a first numerically controlled oscillator based on current frequency offset estimation information for the master cell group and the secondary cell group adjusting a second numerically controlled oscillator based on current frequency offset estimation information for the secondary cell group:

and storing the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator.

4. The method of claim 3, wherein the triggering the master cell group to adjust the voltage controlled oscillator once to overcome the current frequency offset estimation of the master cell group when a difference between an accumulated adjustment amount of the master cell group to the first numerically controlled oscillator and an accumulated adjustment amount of the master cell group to the voltage controlled oscillator is greater than a set threshold value comprises:

acquiring the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator and the accumulated adjustment amount of the master cell group to the first numerical control oscillator;

and calculating the difference value between the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator and the accumulated adjustment amount of the master cell group to the voltage-controlled oscillator, if the difference value is greater than the set threshold value, the master cell group adjusts the voltage-controlled oscillator according to the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator, and clears the accumulated adjustment amount of the master cell group to the first numerically-controlled oscillator.

5. The method of claim 1, prior to said periodically performing a second frequency offset control operation, further comprising:

determining whether time offset information between the new air interface transmission signal and the long term evolution transmission signal is greater than the length of the cyclic prefix of the new air interface;

if the time offset information between the new air interface transmission signal and the long term evolution transmission signal is not greater than the length of the cyclic prefix of the new air interface, and the current scene is determined to be a synchronous non-independent networking scene, executing a third frequency offset control operation, wherein the third frequency offset control operation comprises:

the master cell group adjusts the voltage-controlled oscillator according to the current frequency offset estimation information of the master cell group; and

the secondary cell group adjusting the second numerically controlled oscillator based on a current frequency offset estimate for the secondary cell group.

6. The method of claim 5, wherein the master cell group adjusting the voltage controlled oscillator according to current frequency offset estimation information of the master cell group comprises:

and the master cell group adjusts the voltage-controlled oscillator according to the current frequency offset estimation information of the master cell group only in the partial overlapping range of the cyclic prefixes of the master cell group and the auxiliary cell group.

7. The method of claim 5, wherein the secondary cell group adjusting the second numerically controlled oscillator based on a current frequency offset estimate for the secondary cell group comprises:

and when the current adjustment operation of the second numerically controlled oscillator by the auxiliary cell group is adjacent to the adjustment of the voltage controlled oscillator by the main cell group, compensating the adjustment amount of the voltage controlled oscillator by the main cell group when the second numerically controlled oscillator is adjusted by the auxiliary cell group.

8. The method of claim 7, wherein compensating the master cell set for the adjustment of the voltage controlled oscillator when the secondary cell set adjusts the second voltage controlled oscillator comprises:

performing the adjustment operation of the secondary cell group on the second numerically controlled oscillator currently by adopting the following formula:

9. An apparatus for frequency offset control, the apparatus comprising:

a processor and a memory for storing at least one instruction which when loaded and executed by the processor is to carry out a method of frequency offset control according to any of claims 1 to 8.

10. A terminal, characterized in that the terminal comprises: the frequency deviation control apparatus of claim 9.

11. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the frequency offset control method of any of claims 1-8.