CN113438727B

CN113438727B - SSB and TRS-based time offset estimation method, device, terminal and storage medium

Info

Publication number: CN113438727B
Application number: CN202110718217.6A
Authority: CN
Inventors: 张洋
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-06-21
Anticipated expiration: 2041-06-28
Also published as: CN113438727A

Abstract

The embodiment of the application provides a time offset estimation method, a device, a terminal and a storage medium based on SSB and TRS, wherein the method comprises the steps of judging whether a CTO result of a Synchronous Signal Block (SSB) is valid or not after the CTO result is compensated by the timing offset of the SSB; if the CTO result of the SSB is valid, judging whether continuous N valid CTO results of the SSB exist, wherein N is more than or equal to 2; if the CTO results of the continuous N effective SSBs exist, adjusting the timing deviation according to the CTO results of the continuous N effective SSBs; and in a receiving time range corresponding to the CTO results of the continuous N effective SSBs, the CTO result of the effective time-frequency tracking reference signal TRS is not received. In the embodiment of the application, the timing offset adjustment is performed based on the combination of the SSBs and the TRS, and in a connected state, even if the CTO result of the TRS is invalid or there is no CTO result of the TRS, the timing offset adjustment can be performed based on the received CTO results of N consecutive SSBs, so that the system timing offset can be adjusted timely and accurately.

Description

SSB and TRS-based time offset estimation method, device, terminal and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a time offset estimation method, apparatus, terminal, and storage medium based on SSB and TRS.

Background

Timing synchronization in a communication system is a key technology which affects the performance of the system, and a large timing deviation can cause interference between signals and directly affect the accuracy of channel transmission, so that high-reliability time offset estimation is particularly important for the communication system.

In the 5G NR (New Radio) system, a terminal needs to estimate and correct a timing deviation according to two types of Reference signals, namely a Tracking Reference Signal (TRS) and a Synchronization Signal Block (SSB). Wherein, only SSB exists in the non-connection state, and SSB and TRS exist in the connection state. Since the number of rbs (resource block) of the SSB is less than that of the TRS, the accuracy of the time offset estimation result is low, and the timing offset is adjusted only according to the time offset result of the TRS in the connected state.

However, in the case of a poor signal or interference, the signal-to-noise ratio of the TRS may be poor, resulting in the TRS being invalid. In addition, when the TRS is out of the wake-up time (on duration) of Discontinuous Reception (DRX) or overlaps with the GAP, the upper layer does not schedule the TRS, and thus there is no effective TRS, which results in that the system timing offset cannot be adjusted.

Disclosure of Invention

The application provides a time offset estimation method, a device, a terminal and a storage medium based on SSB and TRS, which are beneficial to solving the problem that in the prior art, the system timing offset may not be adjusted all the time in a connection state.

In a first aspect, an embodiment of the present application provides a time offset estimation method based on an SSB and a TRS, including:

judging whether the CTO result of the SSB is valid or not after receiving the CTO result of the timing offset compensation of the SSB;

if the CTO result of the SSB is valid, judging whether continuous N valid CTO results of the SSB exist, wherein N is more than or equal to 2;

if the CTO results of the continuous N effective SSBs exist, adjusting the timing deviation according to the CTO results of the continuous N effective SSBs;

and in a receiving time range corresponding to the CTO results of the continuous N effective SSBs, the CTO result of the effective time-frequency tracking reference signal TRS is not received.

Preferably, if there are CTO results of consecutive N valid SSBs, adjusting the timing offset according to the CTO results of consecutive N valid SSBs includes:

and if the CTO results of the continuous N effective SSBs exist, adjusting the timing deviation according to the CTO result of the last SSB in the CTO results of the continuous N effective SSBs.

Preferably, if there are CTO results of consecutive N valid SSBs, adjusting the timing offset according to the CTO result of the last SSB in the CTO results of consecutive N valid SSBs includes:

if the CTO results of the continuous N effective SSBs exist, judging whether the signal-to-noise ratio (SNR) of the CTO result of the last SSB in the CTO results of the continuous N effective SSBs is larger than or equal to a preset first SNR threshold value;

and if the SNR of the CTO result of the last SSB is greater than or equal to the first SNR threshold, adjusting the timing deviation according to the CTO result of the last SSB.

Preferably, the method further comprises:

if the SNR of the CTO result of the last SSB is smaller than the first SNR threshold, judging whether the CTO result of the last SSB in the CTO results of the continuous N effective SSBs is larger than or equal to the first SNR threshold;

and if the CTO result of the last-but-one SSB is greater than or equal to the first SNR threshold, adjusting the timing deviation according to the CTO result of the last-but-one SSB.

Preferably, the determining whether the CTO result of the SSB is valid includes:

judging whether the SSB meets Cyclic Redundancy Check (CRC) or not, wherein the signal-to-noise ratio (SNR) of the SSB is greater than or equal to a preset second SNR threshold value;

and when the SSB meets the CRC and the SNR of the SSB is greater than or equal to a preset second SNR threshold value, determining that the CTO result of the SSB is valid.

Preferably, the method further comprises:

after receiving the CTO result of the TRS, judging whether the CTO result of the TRS is effective or not;

and if the CTO result of the TRS is valid, adjusting the timing deviation according to the CTO result of the TRS.

Preferably, the determining whether the CTO result of the TRS is valid includes:

judging whether the SNR of the TRS is greater than or equal to a preset third SNR threshold value or not;

and if the SNR of the TRS is greater than or equal to a preset third SNR threshold, determining that the CTO result of the TRS is valid.

In a second aspect, an embodiment of the present application provides a time offset estimation apparatus based on SSB and TRS, including:

the first judgment module is used for judging whether the CTO result of the SSB is valid or not after the CTO result of the timing offset compensation of the SSB is received;

the second judgment module is used for judging whether continuous N effective CTO results of the SSBs exist or not if the CTO results of the SSBs are effective, wherein N is more than or equal to 2;

a first adjusting module, configured to adjust a timing offset according to the CTO results of the N consecutive valid SSBs if the CTO results of the N consecutive valid SSBs exist;

Preferably, the first adjusting module is specifically configured to:

Preferably, the first adjusting module is further configured to:

Preferably, the first determining module is specifically configured to:

Preferably, the apparatus further comprises:

the third judging module is used for judging whether the CTO result of the TRS is valid or not after the CTO result of the TRS is received;

and the second adjusting module is used for adjusting the timing deviation according to the CTO result of the TRS if the CTO result of the TRS is valid.

Preferably, the third determining module is specifically configured to:

In a third aspect, an embodiment of the present application provides a terminal, including:

one or more processors;

a memory;

and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions which, when executed by the terminal, cause the terminal to perform the method of any of the above first aspects.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium includes a stored program, where when the program runs, the computer-readable storage medium is controlled by a device to perform the method of any one of the above first aspects.

In the embodiment of the application, the timing offset adjustment is performed based on the combination of the SSBs and the TRS, and in a connected state, even if the CTO result of the TRS is invalid or there is no CTO result of the TRS, the timing offset adjustment can be performed based on the received CTO results of N consecutive SSBs, so that the system timing offset can be adjusted timely and accurately.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described 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 to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a schematic system architecture diagram of a terminal according to an embodiment of the present disclosure;

fig. 2 is a schematic flow chart of a time offset estimation method based on SSB and TRS according to an embodiment of the present application;

fig. 3 is a schematic view of an application scenario provided in an embodiment of the present application;

fig. 4 is a schematic flow chart of another time offset estimation method based on SSB and TRS according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. 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 application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., A and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The terms referred to in the embodiments of the present application will be described first below.

CSI-RS (Channel State Information-Reference Signal), Channel State Information Reference Signal;

TRS (tracking Reference signal), time frequency tracking Reference signal;

ssb (synchronization Signal block), synchronization Signal block;

rb (resource block), a resource unit allocated by the traffic channel resource, which is a time slot in the time domain and 12 subcarriers in the frequency domain;

drx (discontinuous reception), discontinuous reception;

CTO, timing offset compensation;

crc (cyclic Redundancy check), cyclic Redundancy check;

SNR (Signal-to-Noise Ratio), Signal-to-Noise Ratio.

In order to better understand the embodiment of the present application, a system architecture of a terminal provided in the embodiment of the present application is first described below. Referring to fig. 1, a system architecture diagram of a terminal provided in the embodiment of the present application is shown. The terminal may also be referred to as a mobile terminal, a User Equipment (UE), and the like, and specifically may include: the present disclosure relates to a Mobile terminal, and more particularly, to a Mobile terminal, a handheld computer, a tablet computer, a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a wearable Device (such as a smart watch, a smart bracelet, etc.), and the like.

In the system architecture of the terminal shown in fig. 1, at least an antenna, a Radio Frequency Front End (RFFE), a Radio Frequency Integrated Circuit (RFIC), an oscillator, a phase-locked loop, and a processor may be included. The processor may be an SOC (System on Chip) Chip including an Application processor, a baseband processor, an image processor, etc., or a baseband processor used only for baseband signal processing or an Application Specific Integrated Circuit (ASIC), etc., and the RFFE and the RFIC constitute a Transceiver (Transceiver) of the user terminal, and are configured to modulate a transmission signal from the baseband part and transmit the modulated transmission signal to an antenna, or receive and demodulate an air interface signal and transmit the demodulated transmission signal to the baseband part for processing a communication protocol.

The RFFE may comprise at least: a duplexer and a Power Amplifier (PA). The duplexer is mainly used for coupling the transmitting path and the receiving path to the antenna, so that the antenna can transmit signals or receive signals or transmit and receive signals at the same time; the PA is used primarily for power amplification of the transmit signal on the transmit path so that it can be transmitted from the antenna.

The radio frequency chip RFIC is a modulation and demodulation unit behind the radio frequency front end RFFE, and may at least include an up converter and a down converter, where the up converter is mainly used for modulating signals, that is, modulating low-frequency signals of a baseband into high-frequency signals (that is, performing up conversion) on a transmission path; the downconverter is used primarily to demodulate signals, i.e., demodulate high frequency signals to baseband signals on the receive path (i.e., downconvert). The rf chip RFIC may further include a Low Noise Amplifier (LNA) located before demodulation of the down-converter (as shown by a dotted line in the figure), and is mainly used for amplifying a received signal.

The oscillator may be a crystal oscillator XO which may be used to generate an oscillation frequency which is mixed with an up-converter or down-converter by means of a phase locked loop. The up-converter and down-converter, which may also be referred to as mixers, generate a baseband signal by mixing a high frequency signal with an oscillation signal generated by an oscillator, or generate a high frequency signal by mixing a baseband signal with an oscillation signal generated by an oscillator.

The processor is mainly configured to process a baseband signal according to a Communication protocol, and may support Communication protocols such as GSM (Global System for Mobile Communication), UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution), CDMA (Code Division Multiple Access), and 5G (The 5th Generation Mobile Communication Technology), which is not limited in The embodiment of The present application.

It can be understood that timing synchronization is a key technology affecting system performance in a communication system, and a large timing offset may cause inter-signal interference, which directly affects channel transmission accuracy, so that a highly reliable time offset estimation is particularly important for the communication system.

In the 5G NR system, the terminal needs to estimate and correct the timing offset according to the TRS and SSB reference signals. Wherein, only SSB exists in the non-connection state, and SSB and TRS exist in the connection state. Since the RB number of the SSB is less than the TRS, the accuracy of the time offset estimation result is low, and the timing offset is adjusted only according to the time offset result of the TRS in the link state.

However, in the case of a poor signal or interference, the signal-to-noise ratio of the TRS may be poor, resulting in the TRS being invalid. In addition, when the TRS is out of the DRX wake-up time (on duration) or overlaps with the GAP, the upper layer does not schedule the TRS, and thus there is no effective TRS, and the system timing offset cannot be adjusted.

In view of the above problems, embodiments of the present application provide a time offset estimation scheme based on an SSB and a TRS, and in a connected state, even if a CTO result of the TRS is invalid or there is no CTO result of the TRS, a system timing offset can be timely and accurately adjusted.

Referring to fig. 2, a schematic flow chart of a time offset estimation method based on SSB and TRS provided in the embodiment of the present application is shown. The method can be applied to the terminal shown in fig. 1, and mainly includes the following steps, as shown in fig. 2.

Step S201: the timing offset of the received synchronization signal block SSB compensates for the CTO result.

Both TRS and SSB types of reference signals exist in the connected state, and thus, the timing offset compensation CTO result of the synchronization signal block SSB may be received in the connected state.

Step S202: and judging whether the CTO result of the SSB is valid or not.

It can be understood that if the CTO result of the SSB is invalid, it indicates that it is not accurate and cannot be adjusted for timing offset. Therefore, in the embodiment of the present application, after receiving the CTO result of the SSB, it is first determined whether the CTO result of the SSB is valid.

Specifically, whether the SSB meets Cyclic Redundancy Check (CRC) is judged, and the signal-to-noise ratio (SNR) of the SSB is greater than or equal to a preset second SNR threshold value; when the SSB satisfies the CRC and the SNR of the SSB is greater than or equal to a preset second SNR threshold, determining that the CTO result of the SSB is valid, and entering step S203; otherwise, the process proceeds to step S205.

Step S203: and judging whether continuous N valid CTO results of the SSBs exist, wherein N is more than or equal to 2.

The CTO results of the N consecutive SSBs referred to in the embodiment of the present application refer to CTO results of the time-frequency tracking reference signal TRS that are not received within a receiving time range corresponding to the CTO results of the N consecutive SSBs. In other words, the CTO results of N valid SSBs have been received, and the CTO result of one valid TRS has not been received. At this time, the timing offset is adjusted according to the CTO results of the consecutive N valid SSBs.

It should be noted that, because the accuracy of the time offset estimation result of the SSB with respect to the TRS is low, the timing offset adjustment is performed based on the CTO results of N valid SSBs only when the CTO results of the N valid SSBs are continuously received. Specifically, when it is determined that there are consecutive CTO results of N valid SSBs, the process proceeds to step S204; otherwise, return to step S201.

The number of N can be configured by those skilled in the art according to actual needs, for example, it can be 2, 3, 5, 8, etc., and this is not particularly limited by the embodiments of the present application.

Referring to fig. 3, a schematic view of an application scenario provided in the embodiment of the present application is shown. In the embodiments of the present application, N-3 will be described as an example.

As shown in fig. 3, at time t0, the terminal receives the CTO result of the TRS. It can be understood that if the CTO result of the TRS is valid, the terminal may adjust the timing offset according to the result. The terminal receives a CTO result of the SSB at times t1, t2, and t3, respectively. If the CTO results of the 3 SSBs are all valid CTO results, performing timing offset adjustment according to the CTO results of the 3 SSBs. That is, at this time, the wait for the CTO result of the TRS is not continued, but the timing offset adjustment is performed based on the CTO result of the SSB.

Step S204: and adjusting the timing deviation according to the CTO results of the continuous N effective SSBs.

In a specific implementation, if there are CTO results of N consecutive valid SSBs, the timing offset is adjusted according to the CTO results of the N consecutive valid SSBs.

In one possible implementation, adjusting the timing offset according to the CTO results of the N consecutive valid SSBs includes: and if the CTO results of the continuous N SSBs are valid, adjusting the timing deviation according to the CTO result of the last SSB in the CTO results of the continuous N valid SSBs.

Since the CTO result of the last sso of the CTO results of the N consecutive valid SSBs is usually the most accurate, the accuracy of the timing offset adjustment can be improved by adjusting the timing offset using the CTO result of the last SSB. Of course, those skilled in the art can select other CTO results of SSB to adjust the timing offset, which is not specifically limited by the embodiments of the present application.

In another possible implementation manner, adjusting the timing offset according to the CTO results of the consecutive N valid SSBs includes: if the CTO results of the continuous N effective SSBs exist, judging whether the signal-to-noise ratio (SNR) of the CTO result of the last SSB in the CTO results of the continuous N effective SSBs is larger than or equal to a preset first SNR threshold value or not; and if the SNR of the CTO result of the last SSB is greater than or equal to the first SNR threshold, adjusting the timing deviation according to the CTO result of the last SSB.

That is, it is determined whether the CTO result of the last SSB meets the snr requirement, and the timing offset is adjusted according to the CTO result of the last SSB only when the snr requirement is met.

In a possible implementation manner, if the SNR of the CTO result of the last SSB is smaller than the first SNR threshold, determining whether the CTO result of the second last SSB in the CTO results of the consecutive N valid SSBs is greater than or equal to the first SNR threshold; and if the CTO result of the last-but-one SSB is greater than or equal to the first SNR threshold, adjusting the timing deviation according to the CTO result of the last-but-one SSB.

That is, when the CTO result of the last SSB is determined not to satisfy the snr requirement, forward search is performed to determine whether the CTO result of the penultimate SSB satisfies the snr requirement, and if the CTO result of the penultimate SSB satisfies the snr requirement, the timing offset is adjusted according to the CTO result of the penultimate SSB.

It should be noted that if the CTO result of the penultimate SSB still does not meet the snr requirement, the CTO result of the other SSB is not searched forward (the CTO result of the other SSB has been received for a long time and may have a large error), and the adjustment of the timing offset is abandoned.

Step S205: the CTO results of the SSB are discarded.

Specifically, if the CTO result of the SSB is invalid, the CTO result of the SSB is discarded.

In the embodiment of the application, the time offset adjustment is performed based on the combination of the SSBs and the TRS, and in a connected state, even if the CTO result of the TRS is invalid or there is no CTO result of the TRS, the timing offset adjustment can be performed based on the received CTO results of N consecutive SSBs, so that the system timing offset is adjusted timely and accurately.

Referring to fig. 4, a schematic flow chart of another time offset estimation method based on SSB and TRS provided in the embodiment of the present application is shown. The method steps in the embodiments of the present application may be combined with the method shown in fig. 2, which mainly comprises the following steps, as shown in fig. 4.

Step S401: the CTO result of the TRS is received.

There are two types of reference signals, TRS and SSB, in the connected state, and therefore, the CTO result of TRS may be received in the connected state.

Step S402: and judging whether the CTO result of the TRS is valid or not.

It can be understood that if the CTO result of the TRS is invalid, it is not accurate and the timing offset adjustment cannot be performed. Therefore, in the embodiment of the present application, after receiving the CTO result of the TRS, it is first determined whether the CTO result of the TRS is valid.

Specifically, judging whether the SNR of the TRS is greater than or equal to a preset third SNR threshold; if the SNR of the TRS is greater than or equal to a preset third SNR threshold, determining that the CTO result of the TRS is valid, and entering step S403; otherwise, the process proceeds to step S405.

Step S403: and adjusting the timing deviation according to the CTO result of the TRS.

Because the estimation accuracy of the time offset result of the TRS is higher than that of the SSB, after the CTO result of the TRS is determined to be valid, the timing offset can be directly adjusted according to the CTO result of the TRS.

Step S404: deleting the CTO result of the valid SSB that has been received.

In the embodiment of the present application, when there is no CTO result of the TRS, the timing offset needs to be adjusted according to the CTO results of the N consecutive SSBs. It can be understood that when the timing offset adjustment is performed based on the CTO result of the TRS, the CTO results of the N SSBs may be re-counted, and therefore, the CTO result of the valid SSB that has been received needs to be deleted.

Step S405: discarding the CTO result of the TRS.

And if the CTO result of the TRS is determined to be invalid, discarding the CTO result of the TRS and not adjusting the timing deviation.

Corresponding to the above method embodiment, the present application also provides a time offset estimation apparatus based on SSB and TRS, which mainly includes the following modules.

The first judgment module is used for judging whether the CTO result of the SSB is valid or not after receiving the CTO result of the timing offset compensation of the SSB;

the second judgment module is used for judging whether continuous N effective CTO results of the SSB exist or not if the CTO results of the SSB are effective, wherein N is more than or equal to 2;

a first adjusting module, configured to adjust a timing offset according to the CTO results of N consecutive valid SSBs if the CTO results of the N consecutive valid SSBs exist;

In an optional embodiment, the first adjusting module is specifically configured to: and if the CTO results of the continuous N effective SSBs exist, adjusting the timing deviation according to the CTO result of the last SSB in the CTO results of the continuous N effective SSBs.

In an optional embodiment, the first adjusting module is specifically configured to: if the CTO results of the continuous N effective SSBs exist, judging whether the signal-to-noise ratio (SNR) of the CTO result of the last SSB in the CTO results of the continuous N effective SSBs is larger than or equal to a preset first SNR threshold value; and if the SNR of the CTO result of the last SSB is greater than or equal to the first SNR threshold, adjusting the timing deviation according to the CTO result of the last SSB.

In an optional embodiment, the first adjusting module is further configured to: if the SNR of the CTO result of the last SSB is smaller than the first SNR threshold, judging whether the CTO result of the last SSB in the CTO results of the continuous N effective SSBs is larger than or equal to the first SNR threshold; and if the CTO result of the last-but-one SSB is greater than or equal to the first SNR threshold, adjusting the timing deviation according to the CTO result of the last-but-one SSB.

In an optional embodiment, the first determining module is specifically configured to: judging whether the SSB meets Cyclic Redundancy Check (CRC) or not, wherein the signal-to-noise ratio (SNR) of the SSB is greater than or equal to a preset second SNR threshold value; and when the SSB meets the CRC and the SNR of the SSB is greater than or equal to a preset second SNR threshold value, determining that the CTO result of the SSB is valid.

In an optional embodiment, the apparatus further includes a third determining module, configured to determine, after receiving the CTO result of the TRS, whether the CTO result of the TRS is valid; and the second adjusting module is used for adjusting the timing deviation according to the CTO result of the TRS if the CTO result of the TRS is valid.

In an optional embodiment, the third determining module is specifically configured to: judging whether the SNR of the TRS is greater than or equal to a preset third SNR threshold value or not; and if the SNR of the TRS is greater than or equal to a preset third SNR threshold, determining that the CTO result of the TRS is valid.

Corresponding to the method embodiment, the application also provides a terminal.

Referring to fig. 5, for a schematic structural diagram of a terminal provided in an embodiment of the present application, the terminal 500 may include: a processor 501, a memory 502, and a communication unit 503. The components communicate via one or more buses, and those skilled in the art will appreciate that the architecture of the servers shown in the figures is not limiting of the application, and may be a bus architecture, a star architecture, a combination of more or fewer components than those shown, or a different arrangement of components.

The communication unit 503 is configured to establish a communication channel, so that the storage device can communicate with other devices. And receiving user data sent by other equipment or sending the user data to other equipment.

The processor 501, which is a control center of the storage device, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and/or processes data by operating or executing software programs and/or modules stored in the memory 502 and calling data stored in the memory. The processor may be composed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs connected with the same or different functions. For example, the processor 501 may include only a Central Processing Unit (CPU). In the embodiments of the present application, the CPU may be a single arithmetic core or may include multiple arithmetic cores.

The memory 502 is used for storing the execution instructions of the processor 501, and the memory 502 may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

The execution instructions in the memory 502, when executed by the processor 501, enable the terminal 500 to perform the steps in the above-described method embodiments.

In specific implementation, the present application further provides a computer storage medium, where the computer storage medium may store a program, and the program may include some or all of the steps in the embodiments provided in the present application when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).

In specific implementation, the embodiment of the present application further provides a computer program product, where the computer program product includes executable instructions, and when the executable instructions are executed on a computer, the computer is caused to execute some or all of the steps in the foregoing method embodiments.

In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

Those of ordinary skill in the art will appreciate that the various elements and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope 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 several embodiments provided by the present invention, any function, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method 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 an embodiment of the present invention, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A time offset estimation method based on SSB and TRS is characterized by comprising the following steps:

if the CTO results of the SSBs are valid, judging whether continuous N valid CTO results of the SSBs exist, wherein N is more than or equal to 2;

2. The method of claim 1, wherein the adjusting the timing offset according to the CTO results of the N consecutive valid SSBs if the CTO results of the N consecutive valid SSBs exist comprises:

3. The method of claim 2, wherein if there are consecutive N valid sso results, adjusting the timing offset according to the CTO result of the last sso in the consecutive N valid sso results comprises:

4. The method of claim 3, further comprising:

5. The method of claim 1, wherein determining whether the CTO result of the SSB is valid comprises:

6. The method of claim 1, further comprising:

7. The method of claim 6, wherein determining whether the CTO result of the TRS is valid comprises:

8. An apparatus for estimating time offset based on SSB and TRS, comprising:

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

10. The apparatus of claim 9, wherein the first adjusting module is specifically configured to:

if the CTO results of the continuous N effective SSBs exist, judging whether the signal-to-noise ratio (SNR) of the CTO result of the last SSB in the CTO results of the continuous N effective SSBs is larger than or equal to a preset first SNR threshold value or not;

11. The apparatus of claim 10, wherein the first adjusting module is further configured to:

12. The apparatus of claim 8, wherein the first determining module is specifically configured to:

13. The apparatus of claim 8, further comprising:

14. The apparatus according to claim 13, wherein the third determining module is specifically configured to:

15. A terminal, comprising:

one or more processors;

a memory;

and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions which, when executed by the terminal, cause the terminal to perform the method of any of claims 1-7.

16. A computer-readable storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer-readable storage medium resides to perform the method of any one of claims 1-7.