CN112954720B

CN112954720B - Frequency adjustment method, device and equipment

Info

Publication number: CN112954720B
Application number: CN202110350291.7A
Authority: CN
Inventors: 段建峰
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-10-28
Anticipated expiration: 2041-03-31
Also published as: CN112954720A

Abstract

The application provides a frequency adjustment method, a device and equipment, wherein terminal equipment receives downlink signals from corresponding network equipment through a plurality of user cards respectively; if the quality of the downlink signal received by a first user card in the plurality of user cards is lower than a quality threshold, determining at least one second user card from the plurality of user cards, wherein the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold; and adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card. The accuracy of the receiving frequency of the first user card is improved, and the receiving performance of the first user card is further improved.

Description

Frequency adjustment method, device and equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a frequency adjustment method, apparatus, and device.

Background

In a mobile communication network, a terminal device needs to keep frequency synchronization with a network device, and the receiving performance of the terminal device is directly affected by the quality of the frequency synchronization performance.

Generally, a terminal device determines a frequency offset according to a downlink signal received from a network device, adjusts a current receiving frequency according to the frequency offset, and receives downlink data according to the adjusted receiving frequency, thereby maintaining frequency synchronization between the terminal device and the network device. With the development of terminal technology, some terminal devices support a plurality of user cards, which are registered in different cells, respectively. In the prior art, when frequency adjustment is performed on a terminal device supporting multiple user cards, a frequency offset of each user card is determined according to a frequency adjustment scheme of a single-card terminal, that is, for each user card, according to a downlink signal received by the user card, and then a current receiving frequency of the user card is adjusted according to the frequency offset of the user card.

However, the downlink signal quality received by some of the user cards may be poor in the plurality of user cards, so that the frequency adjustment of the user cards is not accurate enough, and the reception success rate of the user cards is low.

Disclosure of Invention

The application provides a frequency adjustment method, a frequency adjustment device and frequency adjustment equipment, which are used for improving the accuracy of frequency adjustment of terminal equipment so as to improve the receiving success rate.

In a first aspect, the present application provides a frequency adjustment method, applied to a terminal device with multiple user cards, where the method includes:

receiving downlink signals from corresponding network equipment through the plurality of user cards respectively;

if the quality of the downlink signal received by a first user card in the plurality of user cards is lower than a quality threshold, determining at least one second user card from the plurality of user cards, wherein the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold;

and adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card.

In a possible implementation manner, adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card includes:

determining a target user card from the at least one second user card, wherein the quality of a downlink signal received by the target user card is highest;

determining the frequency offset of the target user card according to the downlink signal received by the target user card;

and adjusting the receiving frequency of the first user card according to the frequency offset of the target user card.

In a possible implementation manner, adjusting the receiving frequency of the first user card according to the frequency offset of the target user card includes:

determining an adjustment parameter of an oscillator corresponding to the first user card according to the frequency offset of the target user card;

and adjusting the crystal oscillation frequency of the oscillator according to the adjustment parameter.

In a possible implementation manner, the target user card corresponds to a primary cell and at least one secondary cell; determining the frequency offset of the target user card according to the downlink signal received by the target user card, including:

determining a target cell from a main cell and at least one auxiliary cell corresponding to the target user card, wherein the quality of a downlink signal received by the target cell through the target user card is highest;

and determining the frequency offset of the target user card according to the downlink signal received by the target user card in the target cell.

In a possible implementation manner, the determining, by the downlink signal including a synchronization signal block SSB and/or a tracking channel state information reference signal TRS, a frequency offset of the target subscriber card according to the downlink signal received by the target subscriber card includes:

and determining the frequency offset of the target user card according to the SSB and/or the TRS received by the target user card.

In one possible implementation, determining at least one second user card from the plurality of user cards includes:

determining at least one candidate user card from the plurality of user cards, wherein the candidate user card is different from an operator corresponding to the first user card;

and determining the candidate user card with the quality of the corresponding downlink signal in the at least one candidate user card higher than or equal to the quality threshold value as the second user card.

In a possible implementation, the method further includes:

if the quality of the downlink signal received by the first user card is higher than or equal to the quality threshold, determining the frequency offset of the first user card according to the downlink signal received by the first user card;

and adjusting the receiving frequency of the first user card according to the frequency offset of the first user card.

In a second aspect, the present application provides a frequency adjustment apparatus, applied to a terminal device provided with a plurality of user cards, the apparatus including:

a receiving module, configured to receive downlink signals from corresponding network devices through the multiple user cards, respectively;

a determining module, configured to determine at least one second user card from the plurality of user cards if quality of a downlink signal received by a first user card of the plurality of user cards is lower than a quality threshold, where quality of the downlink signal received by the second user card is higher than or equal to the quality threshold;

and the adjusting module is used for adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card.

In a possible implementation manner, the adjusting module is specifically configured to:

In a possible implementation manner, the target user card corresponds to a primary cell and at least one secondary cell, and the adjusting module is specifically configured to:

In a possible implementation manner, the downlink signal includes a synchronization signal block SSB and/or a tracking channel state information reference signal TRS, and the adjusting module is specifically configured to:

In a possible implementation manner, the determining module is specifically configured to:

In a possible implementation manner, the adjusting module is further configured to:

In a third aspect, the present application provides a terminal device, including: a transceiver, a processor, a memory;

the memory stores computer-executable instructions;

the processor executes computer-executable instructions stored by the memory, causing the processor to perform the frequency adjustment method of any one of the first aspects.

In a fourth aspect, the present application provides a computer-readable storage medium having stored therein computer-executable instructions for implementing the frequency adjustment method of any one of the first aspect when the computer-executable instructions are executed by a processor.

In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the frequency adjustment method of any one of the first aspect.

According to the frequency adjustment method, the frequency adjustment device and the terminal equipment, the terminal equipment receives downlink signals from the corresponding network equipment through the plurality of user cards respectively; if the quality of the downlink signal received by a first user card in the plurality of user cards is lower than a quality threshold, determining at least one second user card from the plurality of user cards, wherein the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold; and adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card. In the frequency adjustment process, since the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold, the receiving frequency of the first user card is adjusted according to the downlink signal received by at least one second user card, so that the accuracy of the receiving frequency of the first user card can be improved, and the receiving performance of the first user card can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic flowchart of a frequency adjustment method according to an embodiment of the present disclosure;

fig. 3 is a schematic flowchart of another frequency adjustment method according to an embodiment of the present disclosure;

fig. 4 is a schematic flowchart of another frequency adjustment method according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a frequency adjustment process according to an embodiment of the present application;

fig. 6 is a schematic diagram of another frequency adjustment process provided in the embodiment of the present application;

fig. 7 is a schematic structural diagram of a frequency adjustment apparatus according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

For ease of understanding, first, the concepts related to the present application will be explained.

The terminal equipment: the terminal equipment can be deployed on land, including indoors or outdoors, is handheld, worn or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety, a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), a wearable terminal device, and the like. The terminal device according to the embodiments of the present application may also be referred to as a terminal, a User Equipment (UE), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus. The terminal equipment may also be fixed or mobile.

A network device: may be a device for communicating with a mobile device. The network device may be an Access Point (AP) in a WLAN, a base station (BTS) in GSM or CDMA, a base station (nodeB) in WCDMA, an evolved node B (eNB or eNodeB) in LTE, a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network or a network device in a future evolved PLMN network.

Frequency shift: in the process of communication between the terminal device and the network device, a crystal oscillator is usually arranged in the terminal device and the network device, and the terminal device and the network device keep frequency synchronization through the crystal oscillator. However, in practical applications, when the stability of the crystal oscillator in the terminal device is not high or the terminal device moves fast, the frequencies of the terminal device and the network device deviate, and the deviation of the frequencies may be referred to as frequency offset. The network equipment sends downlink data at a sending frequency, the terminal equipment receives the downlink data at a receiving frequency, and in order to accurately receive the downlink data sent by the network equipment, the terminal equipment detects frequency offset between the terminal equipment and the network equipment and compensates the frequency offset so as to synchronize the frequency between the terminal equipment and the network equipment, so that the terminal equipment can accurately receive the downlink data sent by the network equipment.

The multi-card terminal: a terminal device supports a plurality of user cards. That is, the terminal device may support multiple user cards. The user card can be any one of the following cards: a Subscriber Identity Module (SIM) card, a User Identity Module (UIM) card, a Universal Subscriber Identity Module (USIM) card.

Next, a communication system to which the embodiment of the present application is applied will be described with reference to fig. 1.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application. Referring to fig. 1, the communication system includes a network device 101 and a terminal device 102, and wireless communication is performed between the network device and the terminal device. The communication system may include: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a Long Term Evolution (LTE) system, or a 5th-generation (5G) system. Of course, the communication system may be other, and this is not particularly limited in this embodiment of the present application.

In the embodiment of the present application, the terminal device is a multi-card terminal, that is, the terminal device may support multiple user cards. Wherein a plurality of user cards may be registered in different cells. Alternatively, multiple user cards may be registered in different cells of the same operator. Alternatively, multiple user cards may be registered in cells of different operators.

In the multi-card terminal, each user card corresponds to an oscillator. The oscillator corresponding to each user card is used for adjusting the receiving frequency of the user card. Specifically, the receiving frequency of the corresponding user card is adjusted by adjusting the crystal oscillation frequency of the oscillator. In some examples, the oscillator corresponding to each user card may be disposed in a radio frequency system of the terminal device.

For example, the oscillator in the present embodiment may be a voltage-controlled oscillator (VCO).

In the prior art, when the frequency of the multi-card terminal is adjusted, the frequency of the user card is still determined according to the frequency adjustment scheme of the single-card terminal, that is, for each user card, according to the downlink signal received by the user card, and then the current receiving frequency of the user card is adjusted according to the frequency offset of the user card. However, based on the above scheme, there may be a situation where the quality of downlink signals received by some of the user cards is poor, so that the frequency adjustment of the user cards is not accurate enough, and the reception success rate of the user cards is low.

For example, when the quality of the downlink signal received by one of the subscriber cards is poor and is affected by noise in the downlink signal, the frequency offset determined by the terminal device based on the downlink signal received by the subscriber card may be inaccurate, and therefore, when the VCO is adjusted according to the inaccurate frequency offset, the frequency offset of the crystal oscillator of the VCO may be caused. That is, the frequency offset between the receiving frequency of the terminal device and the transmitting rf of the network device after the VCO adjustment is still too large, which affects the receiving performance of the subscriber card, for example, the subscriber card may not receive the paging message.

The inventor of the present application finds that, in a research process, because a plurality of user cards are respectively connected to different network devices, a terminal device can receive downlink signals of the plurality of network devices, the frequency of an oscillator of the network device is generally stable, and the frequency deviation of signals transmitted by different network devices is not greatly different, so that, when frequency adjustment is performed on each user card of the terminal device, the user card can refer to downlink signals received by other user cards in addition to downlink signals received by the user card.

In the technical scheme, for the multi-card terminal, when the quality of the downlink signal received by the first user card in the multiple user cards is poor, and the quality of the downlink signal received by the second user card is good, the receiving frequency of the first user card can be adjusted according to the downlink signal received by the second user card. In the frequency adjustment process, because the quality of the downlink signal received by the second user card is better, the receiving frequency of the first user card is adjusted according to the downlink signal received by the second user card, so that the accuracy of the receiving frequency of the first user card can be improved, and the receiving performance of the first user card can be improved.

The method described in the present application will be described below with reference to specific examples. It should be noted that the following embodiments may exist alone or in combination with each other, and the description of the same or similar contents is not repeated in different embodiments.

Fig. 2 is a schematic flowchart of a frequency adjustment method according to an embodiment of the present disclosure. The method of the embodiment can be executed by a terminal device which is provided with a plurality of user cards. It should be noted that, in the embodiment of the present application, the number of the user cards supported by the terminal device is not limited, for example, the terminal device may be a dual-card terminal, a triple-card terminal, or a multi-card terminal.

As shown in fig. 2, the method of the present embodiment includes:

s201: and receiving downlink signals from corresponding network equipment through the plurality of user cards respectively.

The user card in this embodiment may be any one of the following: SIM card, UIM card, USIM card, and the like.

In this embodiment, a plurality of user cards of the terminal device access different network devices respectively. The terminal equipment can receive downlink signals from the correspondingly accessed network equipment through each user card.

Alternatively, multiple user cards may access different network devices provided by the same operator.

Alternatively, multiple user cards may access network devices provided by different operators.

In some examples, the downlink signal may include a synchronization signal block (SS/PBCH block, SSB), where PBCH refers to a physical broadcast channel (physical broadcast channel). The network device may periodically send SSBs to the terminal device. The period may be 20 milliseconds (ms), 10ms, or the like, and the period for transmitting the downlink signal may be set according to actual needs. Of course, the network device may also send SSBs to the terminal device aperiodically, e.g., the network device may send SSBs to the terminal device at preconfigured times. Accordingly, the terminal device receives the SSB from the corresponding network device through the user card.

In other examples, the downlink signal may include a channel state information reference signal (TRS) for transmission. The network device may periodically transmit the TRS to the terminal device. For example, the period may be 20 milliseconds (ms), 10ms, 5ms, or the like, and the period of the transmission TRS may be set according to actual needs. Of course, the network device may also transmit the TRS to the terminal device aperiodically, e.g., the network device may transmit the TRS to the terminal device at a preconfigured time. Accordingly, the terminal device receives the TRS from the corresponding network device through the subscriber card.

In still other examples, the downlink signal may include an SSB and a TRS. The terminal device receives the SSB and the TRS from the corresponding network device through the user card.

For any of the plurality of user cards, the user card may be in an IDLE state or an IDLE state, or the user card may be in a CONNECTED state or a CONNECTED state. After the subscriber card completes the camping in a certain cell, the subscriber card may be said to enter an IDLE state or an IDLE state. When the user card completes the random access procedure in the resident cell, the user card may be said to enter a CONNECTED state or a CONNECTED state.

When the user card is in an IDLE state or an IDLE state, the terminal device may receive a downlink signal from a corresponding network device by using a Discontinuous Reception (DRX) technique through the user card.

One DRX cycle includes an active time and a sleep time. The active time of one DRX cycle refers to a duration of a Physical Downlink Control Channel (PDCCH) monitored by the terminal device, and the dormant time refers to a duration of a PDCCH channel not monitored by the terminal device. By adopting the DRX technique, the terminal device only needs to monitor the PDCCH channel during the active time to maintain connection with the network device; the terminal equipment stops monitoring the PDCCH in the sleep time, thereby achieving the purposes of saving electricity and reducing power consumption.

When the user card is in a connected state, the terminal device can continuously monitor the PDCCH through the user card and transmit and receive data according to the indication information sent by the network device. In some possible scenarios, when the user card is in a connected state, the terminal device may also receive a downlink signal from a corresponding network device by using a DRX technique through the user card.

S202: if the quality of the downlink signal received by the first user card in the plurality of user cards is lower than a quality threshold, determining at least one second user card from the plurality of user cards, wherein the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold.

In this embodiment, the quality of the downlink signal may be measured by using the strength and/or the signal-to-noise ratio of the downlink signal. Illustratively, when the strength of the downlink signal is lower than the first threshold, it is indicated that the quality of the downlink signal is lower than the quality threshold. Or, when the signal-to-noise ratio of the downlink signal is lower than the second threshold, it indicates that the quality of the downlink signal is lower than the quality threshold. Or, when the strength of the downlink signal is lower than the first threshold and the signal-to-noise ratio of the downlink signal is lower than the second threshold, it indicates that the quality of the downlink signal is lower than the quality threshold.

It should be noted that, in this embodiment, a specific value of the quality threshold is not limited.

In one possible implementation, the at least one second user card may be determined from the plurality of user cards in a feasible manner as follows: determining at least one candidate user card from the plurality of user cards, wherein the candidate user card is different from an operator corresponding to the first user card; and determining the candidate user card with the quality of the corresponding downlink signal in the at least one candidate user card higher than or equal to a quality threshold as a second user card.

In the above implementation, due to different network deployments of different operators, the quality of the transmission signals of the network devices of different operators may be greatly different, and the quality of the transmission signals of the network devices of the same operator may be not greatly different. Therefore, when the quality of the downlink signal received by the first user card is poor, the second user card is preferentially selected from the user cards (namely candidate user cards) different from the operator accessed by the first user card, and the efficiency of selecting the second user card can be improved.

S203: and adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card.

And when the number of the second user cards is one, adjusting the receiving frequency of the first user card according to the downlink signal received by the second user card. When the number of the second user cards is multiple, the receiving frequency of the first user card can be adjusted according to the downlink signal received by any one of the second user cards; alternatively, the receiving frequency of the first user card may be adjusted by comprehensively considering the downlink signals received by the plurality of second user cards.

For example, taking a three-card terminal as an example, assume that the three user cards are card 1, card 2 and card 3, respectively. If the quality of the downlink signal received by the card 1 is lower than the quality threshold, and the quality of the downlink signal received by the cards 2 and 3 is higher than the quality threshold, the receiving frequency of the card 1 is adjusted according to the downlink signal received by the cards 2 and 3.

Illustratively, the receiving frequency of the card 1 may be adjusted according to the downlink signal received by the card 2. Or, the receiving frequency of the card 1 is adjusted according to the downlink signal received by the card 3. Alternatively, the reception frequency of the card 1 is adjusted by comprehensively considering the downlink signals received by the cards 2 and 3.

Since the quality of the downlink signal received by the cards 2 and 3 is higher than or equal to the quality threshold, the accuracy of the reception frequency of the card 1 can be improved and the reception performance of the card 1 can be improved by adjusting the reception frequency of the card 1 according to the downlink signal received by the cards 2 and 3.

The frequency adjustment method provided by the embodiment includes: receiving downlink signals from corresponding network equipment through the plurality of user cards respectively; if the quality of the downlink signal received by a first user card in the plurality of user cards is lower than a quality threshold, determining at least one second user card from the plurality of user cards, wherein the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold; and adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card. In the frequency adjustment process, since the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold, the receiving frequency of the first user card is adjusted according to the downlink signal received by at least one second user card, so that the accuracy of the receiving frequency of the first user card can be improved, and the receiving performance of the first user card can be improved.

Fig. 3 is a schematic flowchart of another frequency adjustment method according to an embodiment of the present disclosure. As shown in fig. 3, the method of the present embodiment includes:

s301: and receiving downlink signals from corresponding network equipment through the plurality of user cards respectively.

S302: if the quality of the downlink signal received by the first user card in the plurality of user cards is lower than a quality threshold, determining at least one second user card from the plurality of user cards, wherein the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold.

It should be understood that the specific implementation manner of S301 and S302 is similar to the embodiment shown in fig. 2, and is not described herein again.

S303: and determining a target user card from the at least one second user card, wherein the quality of the downlink signal received by the target user card is the highest.

For example, taking a three-card terminal as an example, assume that the three user cards are card 1, card 2 and card 3, respectively. If the quality of the downlink signal received by the card 1 is lower than the quality threshold and the quality of the downlink signal received by the cards 2 and 3 is higher than the quality threshold, the user card with the highest quality of the received downlink signal can be selected from the cards 2 and 3 as the target user card. For example, if the quality of the downstream signal received by the card 2 is higher than the quality of the downstream signal received by the card 3, the card 2 is determined as the target user card.

S304: and determining the frequency offset of the target user card according to the downlink signal received by the target user card.

In this embodiment, the frequency offset estimation is performed on the downlink signal received through the target user card, so as to estimate the frequency offset of the target user card. It should be understood that various frequency offset estimation methods may be used, and the present embodiment is not limited thereto.

In one possible implementation, when the downlink signal includes an SSB and/or a TRS, the frequency offset of the target subscriber card can be determined according to the SSB and/or TRS received by the target subscriber card.

In one example, when the downlink signal received by the terminal device through the target user card includes an SSB, the frequency offset of the target user card may be determined according to the SSB. In another example, when the downlink signal received by the terminal device through the target subscriber card includes a TRS, the frequency offset of the target subscriber card may be determined according to the TRS. In another example, when the downlink signal received by the terminal device through the target subscriber card includes an SSB and a TRS, the frequency offset of the target subscriber card may be determined according to the SSB and the TRS.

In a possible scenario, the target user card is in a CONNECTED state or a CONNECTED state, and a carrier aggregation technology is adopted when the target user card and the corresponding network device perform data transmission. That is, the target subscriber card corresponds to a primary cell and at least one secondary cell. The terminal equipment receives a downlink signal from the primary cell through the target user card, and receives a downlink signal from at least one secondary cell.

In the above scenario, the following feasible ways may be adopted to determine the frequency offset of the target user card: determining a target cell from a main cell and at least one auxiliary cell corresponding to a target user card, wherein the quality of a downlink signal received by the target cell through the target user card is highest; and determining the frequency offset of the target user card according to the downlink signal received by the target user card in the target cell. In the implementation mode, the downlink signal with the highest quality is selected from the main cell and the auxiliary cell to determine the frequency offset of the target user card, and the accuracy of the determined frequency offset is ensured.

S305: and adjusting the receiving frequency of the first user card according to the frequency offset of the target user card.

In this embodiment, after the frequency offset of the target user card is determined, the oscillator of the first user card may be adjusted according to the frequency offset of the target user card, so as to adjust the receiving frequency of the first user card.

In a possible implementation manner, an adjustment parameter of an oscillator corresponding to a first user card may be determined according to a frequency offset of a target user card; and adjusting the crystal oscillation frequency of the oscillator according to the adjustment parameter.

In this embodiment, when the quality of the downlink signal received by the first user card is lower than the quality threshold, a user card with the highest quality of the received downlink signal is selected from the plurality of user cards as a target user card, and according to the downlink signal received by the target user card, the frequency offset of the target user card is determined, and further, according to the frequency offset of the target user card, the receiving frequency of the first user card is adjusted. In the frequency adjustment process, because the quality of the downlink signal received by the target user card is highest and the accuracy of the frequency offset of the target user card determined according to the downlink signal received by the target user card is highest, the receiving frequency of the first user card is adjusted according to the frequency offset of the target user card, so that the accuracy of the receiving frequency of the first user card can be improved to the greatest extent, and the receiving performance of the first user card is improved.

On the basis of any of the above embodiments, the frequency adjustment method is further described below with reference to fig. 4.

Fig. 4 is a flowchart illustrating another frequency adjustment method according to an embodiment of the present disclosure. As shown in fig. 4, the method of the present embodiment includes:

s401: and receiving downlink signals from the corresponding network equipment through the plurality of user cards respectively.

In practical applications, a plurality of user cards all need to perform frequency adjustment, and the frequency adjustment processes of the plurality of user cards are similar. The frequency adjustment processes of S402 to S405 described below are respectively performed for any first user card among the plurality of user cards.

S402: and if the quality of the downlink signal received by the first user card is lower than a quality threshold, determining at least one second user card from the plurality of user cards, wherein the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold.

S403: and adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card.

It should be understood that specific implementation manners of S401 to S403 may refer to the embodiment shown in fig. 2 or fig. 3, and are not described herein again.

S404: and if the quality of the downlink signal received by the first user card is higher than or equal to the quality threshold, determining the frequency offset of the first user card according to the downlink signal received by the first user card.

S405: and adjusting the receiving frequency of the first user card according to the frequency offset of the first user card.

It should be understood that, similar to the prior art, the process of determining the frequency offset of the first user card according to the downlink signal received by the first user card, and the process of adjusting the receiving frequency of the first user card according to the frequency offset of the first user card are not described in detail herein.

In the foregoing process, when the quality of the downlink signal received by the first user card is lower than the quality threshold, the receiving frequency of the first user card may be adjusted according to the downlink signal received by the at least one second user card. Because the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold, the receiving frequency of the first user card is adjusted according to the downlink signal received by at least one second user card, so that the accuracy of the receiving frequency of the first user card can be improved, and the receiving performance of the first user card can be improved.

Next, the frequency adjustment process described above will be described by way of example with reference to fig. 5 to 6. It should be noted that fig. 5 and 6 are only possible examples, and should not be construed as limiting the scope of the present application.

Fig. 5 is a schematic diagram of a frequency adjustment process according to an embodiment of the present disclosure. As shown in fig. 5, taking a dual-card terminal as an example, two user cards, i.e., card 1 and card 2, are provided in the terminal device. It is assumed that the quality of the downstream signal received by the card 2 is below the quality threshold, while the quality of the downstream signal received by the card 1 is above the quality threshold.

Referring to fig. 5, when adjusting the receiving frequency of the card 1, the frequency offset of the card 1 may be determined according to the downlink signal received by the card 1. The receiving frequency of the card 1 is adjusted according to the frequency offset of the card 1, that is, the crystal frequency of the oscillator corresponding to the card 1 is adjusted according to the frequency offset of the card 1.

When the receiving frequency of the card 2 is adjusted, since the quality of the downlink signal received by the card 2 is lower than the quality threshold, it indicates that the card 2 is in a weak network environment, and the frequency offset estimated from the downlink signal received by the card 2 is inaccurate. Therefore, with continued reference to fig. 5, the receiving frequency of the card 2 is adjusted according to the frequency offset of the card 1, that is, the frequency of the oscillator corresponding to the card 2 is adjusted according to the frequency offset of the card 1.

Fig. 6 is a schematic diagram of another frequency adjustment process provided in the embodiment of the present application. As shown in fig. 6, taking a three-card terminal as an example, three user cards, namely card 1, card 2 and card 3, are provided in the terminal device. It is assumed that the quality of the downstream signal received through the card 3 is lower than the quality threshold, while the quality of the downstream signals received through the cards 1 and 2 is higher than the quality threshold, and the quality of the downstream signal received through the card 1 is higher than the quality of the downstream signal received through the card 2.

Referring to fig. 6, when adjusting the receiving frequency of the card 1, the frequency offset of the card 1 may be determined according to the downlink signal received by the card 1. The receiving frequency of the card 1 is adjusted according to the frequency offset of the card 1, that is, the crystal frequency of the oscillator corresponding to the card 1 is adjusted according to the frequency offset of the card 1.

With continued reference to fig. 6, when adjusting the receiving frequency of the card 2, the frequency offset of the card 2 may be determined according to the downlink signal received by the card 2. The receiving frequency of the card 2 is adjusted according to the frequency offset of the card 2, that is, the crystal frequency of the oscillator corresponding to the card 2 is adjusted according to the frequency offset of the card 2.

With continued reference to fig. 6, when adjusting the receiving frequency of the card 3, since the quality of the downlink signal received by the card 3 is lower than the quality threshold, it indicates that the card 3 is in a weak network environment, and the frequency offset estimated from the downlink signal received by the card 3 is inaccurate. The quality of the downlink signal received by the card 1 is the highest, and the receiving frequency of the card 3 may be adjusted according to the frequency offset of the card 1, that is, the crystal frequency of the oscillator corresponding to the card 3 is adjusted according to the frequency offset of the card 1.

Fig. 7 is a schematic structural diagram of a frequency adjustment apparatus according to an embodiment of the present disclosure. The frequency adjustment means may be in the form of software and/or hardware. The frequency adjusting device can be a terminal device, or a processor, a chip, a module and the like arranged in the terminal device. The terminal equipment is provided with a plurality of user cards.

As shown in fig. 7, the frequency adjustment apparatus 700 provided in this embodiment includes: a receiving module 701, a determining module 702 and an adjusting module 703.

The receiving module 701 is configured to receive downlink signals from corresponding network devices through the multiple user cards respectively;

a determining module 702, configured to determine at least one second user card from the multiple user cards if the quality of the downlink signal received by a first user card in the multiple user cards is lower than a quality threshold, where the quality of the downlink signal received by the second user card is higher than or equal to the quality threshold;

an adjusting module 703 is configured to adjust the receiving frequency of the first user card according to the downlink signal received by the at least one second user card.

In a possible implementation manner, the adjusting module 703 is specifically configured to:

In a possible implementation manner, the target user card corresponds to a primary cell and at least one secondary cell, and the adjusting module 703 is specifically configured to:

In a possible implementation manner, the downlink signal includes a synchronization signal block SSB and/or a tracking channel state information reference signal TRS, and the adjusting module 703 is specifically configured to:

In a possible implementation manner, the determining module 702 is specifically configured to:

and determining the candidate user card with the quality of the corresponding downlink signal in the at least one candidate user card higher than or equal to the quality threshold as the second user card.

In a possible implementation manner, the adjusting module 703 is further configured to:

The frequency adjustment apparatus provided in this embodiment may be used to implement the technical solutions in any of the method embodiments described above, and the implementation principle and the technical effects are similar, which are not described herein again.

Fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 8, the terminal device 20 may include: a transceiver 21, a memory 22, a processor 23. The transceiver 21 may include: a transmitter and/or a receiver. The transmitter may also be referred to as a sender, a transmitter, a sending port or a sending interface, and the like, and the receiver may also be referred to as a receiver, a receiving port or a receiving interface, and the like. Illustratively, the transceiver 21, the memory 22, and the processor 23 are connected to each other by a bus 24.

Memory 22 is used to store program instructions;

processor 23 is configured to execute program instructions stored in the memory to cause terminal device 20 to perform any of the frequency adjustment methods shown above.

Wherein the receiver of the transceiver 21 is operable to perform the receiving function of the terminal device in the above method.

The embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-readable storage medium is used for implementing the frequency adjustment method.

Embodiments of the present application may also provide a computer program product, where the computer program product is executable by a processor, and when the computer program product is executed, the frequency adjustment method performed by any one of the terminal devices shown above may be implemented.

The terminal device, the computer-readable storage medium, and the computer program product according to the embodiments of the present application may execute the frequency adjustment method executed by the terminal device, and specific implementation processes and beneficial effects thereof are described above and will not be described herein again.

All or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The foregoing program may be stored in a readable memory. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state disk, magnetic tape, floppy disk, optical disk, and any combination thereof.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

In the present application, the terms "include" and variations thereof may refer to non-limiting inclusions; the term "or" and variations thereof may mean "and/or". The terms "first," "second," and the like in this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. In the present application, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand 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 these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A frequency adjustment method applied to a terminal device provided with a plurality of user cards, the method comprising:

adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card;

adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card, including:

2. The method of claim 1, wherein adjusting the receiving frequency of the first user card according to the frequency offset of the target user card comprises:

3. The method of claim 1, wherein the target user card corresponds to a primary cell and at least one secondary cell; determining the frequency offset of the target user card according to the downlink signal received by the target user card, including:

4. The method according to claim 1, wherein the downlink signal includes a synchronization signal block SSB and/or a tracking channel state information reference signal TRS, and determining a frequency offset of the target subscriber card according to the downlink signal received by the target subscriber card comprises:

5. The method of claim 1, wherein determining at least one second user card from the plurality of user cards comprises:

6. The method according to any one of claims 1 to 5, further comprising:

7. A frequency adjustment apparatus, applied to a terminal device provided with a plurality of user cards, the apparatus comprising:

a determining module, configured to determine at least one second user card from the multiple user cards if quality of a downlink signal received through a first user card of the multiple user cards is lower than a quality threshold, where quality of the downlink signal received through the second user card is higher than or equal to the quality threshold;

the adjusting module is used for adjusting the receiving frequency of the first user card according to the downlink signal received by the at least one second user card;

the adjustment module is specifically configured to:

8. The apparatus of claim 7, wherein the adjustment module is specifically configured to:

9. The apparatus of claim 7, wherein the target ue corresponds to a primary cell and at least one secondary cell, and wherein the adjusting module is specifically configured to:

10. The apparatus of claim 7, wherein the downlink signal comprises a synchronization signal block SSB and/or a tracking channel state information reference signal TRS, and the adjusting module is specifically configured to:

11. The apparatus of claim 7, wherein the determining module is specifically configured to:

12. The apparatus according to any one of claims 7 to 11, wherein the adjusting module is further configured to:

and adjusting the receiving frequency of the first user card according to the frequency deviation of the first user card.

13. A terminal device, comprising: a transceiver, a processor, a memory;

the memory stores computer execution instructions;

the processor executing computer-executable instructions stored by the memory causes the processor to perform the frequency adjustment method of any of claims 1 to 6.

14. A computer-readable storage medium having stored thereon computer-executable instructions for implementing the frequency adjustment method of any one of claims 1 to 6 when executed by a processor.