CN113507353B

CN113507353B - Time offset adjusting method, system, electronic device and storage medium

Info

Publication number: CN113507353B
Application number: CN202110680710.3A
Authority: CN
Inventors: 张洋
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-08-30
Anticipated expiration: 2041-06-18
Also published as: CN113507353A

Abstract

The invention discloses a time offset adjusting method, a system, electronic equipment and a storage medium, wherein the method comprises the steps of obtaining a downlink reference signal received in the current time period; selecting a target reference signal according to the received signal-to-noise ratios of all downlink reference signals; and adjusting the time offset according to the target time offset calculated by using the target reference signal. In the invention, the target reference signal is determined according to the signal-to-noise ratios of the system synchronization block for estimating the time offset, the physical downlink shared channel demodulation reference signal and the channel state information reference signal, so that the time offset can be adjusted by utilizing the target time offset calculated according to the target reference signal.

Description

Time offset adjusting method, system, electronic device and storage medium

Technical Field

The present invention relates to the field of communications, and in particular, to a method and a system for adjusting a time offset, an electronic device, and a storage medium.

Background

In a Long Term Evolution (LTE) system, a base station can periodically transmit a reference signal, and a User Equipment (UE) keeps synchronization with the base station in time and frequency by tracking the reference signal. In other words, due to hardware differences between the user equipment and the base station, such as the crystal oscillators are not synchronized, a certain time Offset always exists, and the user equipment calculates and corrects the time Offset (Carrier Timing Offset, CTO, herein referred to as time Offset) by tracking the reference signal periodically transmitted by the base station, so as to adjust the receiving time of the user equipment, and when the adjustment is on the right, the better the resolving capability of the user equipment is.

In the existing 5G New Radio access technology (5G New Radio), generally, a time offset needs to be estimated according to a system synchronization Block (SS/PBCH Block, SSB) for time offset estimation and a reference signal (TRS) for tracking channel state information, and when a reference signal for tracking channel state information is not configured, the system synchronization Block for time offset estimation is directly used to estimate the time offset, but the system synchronization Block for time offset estimation has at least 2 disadvantages, which are specifically as follows:

(1) the number of physical Resource Blocks (RBs) is small, so the estimated time offset accuracy is limited;

(2) the time-frequency position is fixed, so when signal interference of adjacent cells or LTE and the like exists, the estimated value of the time-frequency position is always influenced, the result is inaccurate, and the downlink demodulation performance is influenced.

Disclosure of Invention

The invention aims to overcome the defect of inaccurate time offset adjustment caused by inaccurate time offset estimation in the prior art, and provides a time offset adjustment method, a time offset adjustment system, electronic equipment and a storage medium, which can improve the time offset estimation accuracy and further improve the time offset adjustment accuracy.

The invention solves the technical problems through the following technical scheme:

the invention provides a time offset adjusting method, which comprises the following steps:

acquiring a downlink reference signal received in a current time period, wherein the downlink reference signal comprises at least one of a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information-reference signal (CSI-RS);

selecting a target reference signal according to the received signal-to-noise ratios of all downlink reference signals;

and adjusting the time offset according to the target time offset calculated by using the target reference signal.

Preferably, the step of selecting the target reference signal according to the received signal-to-noise ratios of all downlink reference signals specifically includes:

taking signals with signal-to-noise ratios greater than a first threshold value in all received downlink reference signals as first preselected reference signals;

and selecting a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal.

Preferably, the step of selecting a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal specifically comprises:

if the first pre-selection reference signal simultaneously comprises a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal, taking a signal with a high signal-to-noise ratio in the physical downlink shared channel demodulation reference signal and the channel state information reference signal as a second pre-selection reference signal:

when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the second pre-selected reference signal and a second threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or the presence of a gas in the gas,

when the signal-to-noise ratio of the system synchronization block for time offset estimation is less than the sum of the signal-to-noise ratio of the second pre-selected reference signal and the second threshold: and if the signal-to-noise ratio of the channel state information reference signal is greater than or equal to the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and a third threshold, taking the channel state information reference signal as a target reference signal, and/or if the signal-to-noise ratio of the channel state information reference signal is less than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the third threshold, taking the physical downlink shared channel demodulation reference signal as a target reference signal.

Preferably, the selecting a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal specifically includes:

if the preselected reference signal only comprises a system synchronization block for time offset estimation and a demodulation reference signal of a physical downlink shared channel: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the demodulation reference signal of the physical downlink shared channel and a fourth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fourth threshold, taking the physical downlink shared channel demodulation reference signal as a target reference signal; and/or the presence of a gas in the gas,

if the preselected reference signal only comprises a demodulation reference signal of a physical downlink shared channel and a reference signal of channel state information: when the signal-to-noise ratio of the channel state information reference signal is greater than or equal to the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and a fifth threshold, taking the channel state information reference signal as a target reference signal, and/or when the signal-to-noise ratio of the channel state information reference signal is less than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fifth threshold, taking the physical downlink shared channel demodulation reference signal as a target reference signal; and/or the presence of a gas in the gas,

if the preselected reference signal only includes a system synchronization block and a csi reference signal for timing offset estimation: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the channel state information reference signal and a sixth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or, when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the channel state information reference signal and the sixth threshold, taking the channel state information reference signal as a target reference signal; and/or the presence of a gas in the atmosphere,

and if the preselected reference signal only comprises one of a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal, taking the corresponding preselected reference signal as a target reference signal.

Preferably, the step of using the signal to noise ratio of all the received downlink reference signals greater than the first threshold as the first pre-selected reference signal includes:

if the received downlink reference signal comprises a physical downlink shared channel demodulation reference signal, when the number of physical resource blocks in a shared channel corresponding to the physical downlink shared channel demodulation reference signal is higher than a number threshold and the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal is greater than a first signal-to-noise ratio threshold, taking the physical downlink shared channel demodulation reference signal as a first preselected reference signal.

Preferably, if the downlink reference signal is received in the current time period, the step of adjusting the time offset according to the target time offset specifically includes: adjusting the time offset after the interval time threshold according to the target time offset;

the time offset adjustment method further comprises the following steps: taking the time point of time offset adjustment as the starting point of the next time period; and/or the presence of a gas in the gas,

if the downlink reference signal is not received in the current time period or the received downlink reference signal does not satisfy a preset condition, the time offset adjustment method further includes: and taking the end point of the current time period as the starting point of the next time period.

The invention also provides a time offset adjusting system, which comprises: the device comprises a signal acquisition module, a signal selection module and a time offset adjustment module;

the signal acquisition module is used for acquiring a downlink reference signal received in a current time period, wherein the downlink reference signal comprises at least one of a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal;

the signal selection module is used for selecting a target reference signal according to the signal-to-noise ratios of all received downlink reference signals;

and the time offset adjusting module is used for adjusting the time offset according to the target time offset calculated by using the target reference signal.

Preferably, the signal selection module specifically includes: a first signal selection unit and a target signal selection unit;

the first signal selection unit is used for taking signals with signal-to-noise ratios greater than a first threshold value in all received downlink reference signals as first preselected reference signals;

the target signal selection unit is used for selecting a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal.

Preferably, the target signal selection unit is specifically configured to, if the first pre-selection reference signal simultaneously includes a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal, and a channel state information reference signal, use a signal with a high signal-to-noise ratio in the physical downlink shared channel demodulation reference signal and the channel state information reference signal as a second pre-selection reference signal:

when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the second pre-selected reference signal and a second threshold value, taking the system synchronization block for time offset estimation as a target reference signal; and/or the presence of a gas in the gas,

Preferably, the target signal selection unit is specifically configured to, if the preselected reference signal only includes a system synchronization block and a physical downlink shared channel demodulation reference signal for time offset estimation: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the demodulation reference signal of the physical downlink shared channel and a fourth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or, when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fourth threshold, taking the physical downlink shared channel demodulation reference signal as a target reference signal; and/or the presence of a gas in the atmosphere,

if the preselected reference signal only includes a system synchronization block and a csi reference signal for timing offset estimation: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the channel state information reference signal and a sixth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or, when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the channel state information reference signal and the sixth threshold, taking the channel state information reference signal as a target reference signal; and/or the presence of a gas in the gas,

Preferably, the first signal selecting unit is specifically configured to, if the received downlink reference signal includes a physical downlink shared channel demodulation reference signal, use the physical downlink shared channel demodulation reference signal as a first pre-selection reference signal when the number of physical resource blocks in a shared channel corresponding to the physical downlink shared channel demodulation reference signal is higher than a number threshold and a signal-to-noise ratio of the physical downlink shared channel demodulation reference signal is greater than a first signal-to-noise ratio threshold.

Preferably, the time offset adjusting system further comprises: the device comprises a signal judgment module and a time determination module;

the signal judging module is used for calling the signal acquiring module, the signal selecting module and the time bias adjusting module if the downlink reference signal is received in the current time period, and the time bias adjusting module is specifically used for adjusting the time bias after an interval time threshold according to the target time bias;

the time determining module is used for taking the time point of time offset adjustment as the starting point of the next time period; and/or the presence of a gas in the gas,

the signal judging module is used for calling the time determining module if the downlink reference signal is not received in the current time period or the received downlink reference signal does not meet the preset condition, and the time determining module is used for taking the end point of the current time period as the starting point of the next time period.

The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the time offset adjustment method.

The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of time offset adjustment as described above.

The positive progress effects of the invention are as follows: in the invention, the target reference signal can be determined according to the signal-to-noise ratios of the system synchronization block, the physical downlink shared channel demodulation reference signal and the channel state information reference signal for time offset estimation, so that the time offset adjustment can be carried out by utilizing the target time offset calculated according to the target reference signal.

Drawings

Fig. 1 is a flowchart of a time offset adjustment method in embodiment 1 of the present invention.

FIG. 2 is a flowchart illustrating a specific implementation of step 102 in example 1.

Fig. 3 is a block diagram of a time period in embodiment 1.

Fig. 4 is a block diagram of a time offset adjustment system in embodiment 2 of the present invention.

Fig. 5 is a schematic block diagram of an electronic device in embodiment 3 of the present invention.

Detailed Description

For a better understanding of the embodiments of the present invention, the following technical terms commonly occurring in the present disclosure are explained:

the descriptions of the first, second, etc. appearing in the embodiments of the present application are for illustrative purposes and for distinguishing the objects of description, and do not indicate any particular limitation on the number of devices in the embodiments of the present application, and do not constitute any limitation on the embodiments of the present application. For example, a first element could be termed a second element, without departing from the scope of the present disclosure, and, similarly, a second element could be termed a first element.

An electronic device according to various embodiments of the present disclosure may include, for example, at least one of: a smartphone, a tablet Personal Computer (PC), a mobile phone, a video phone, an e-book reader, a desktop PC, a laptop PC, a netbook, a workstation, a server, a Personal Digital Assistant (PDA), a Portable Multimedia Player (PMP), an MP3 player, an ambulatory medical device, a camera, or a wearable device (e.g., a head-mounted device (HMD), electronic glasses, electronic clothing, an electronic bracelet, an electronic necklace, an electronic accessory, an electronic tattoo, a smart mirror, or a smart watch). In other embodiments, the electronic device may be a smart home appliance, such as a Television (TV), a Digital Video Disc (DVD) player, an audio component, a refrigerator, an air conditioner, a vacuum cleaner, an oven, a microwave oven, a dishwasher, an air purifier, a set-top box, a home automation control panel, a security control panel, a TV box, a game table, an electronic dictionary, an electronic key, a camcorder, or an electronic photo frame.

In other embodiments, the electronic device may include at least one of: a medical device, such as an ambulatory medical device (e.g., a blood glucose monitoring device, a heart rate monitor, a blood pressure monitoring device, or a thermometer), a Magnetic Resonance Angiography (MRA) machine, a Magnetic Resonance Imaging (MRI) machine, a Computed Tomography (CT) scanner, or an ultrasound machine; a navigation device; a Global Positioning System (GPS) receiver; event Data Recorder (EDR); a Flight Data Recorder (FDR); in-vehicle infotainment devices; marine electronics (e.g., a marine navigation device and/or a gyroscopic compass); an avionics device; a security device; a car stereo; industrial or domestic robots; an Automated Teller Machine (ATM) of a financial institution; a point of sale (POS) device of a retail store; or an internet of things device (e.g., a light bulb, various sensors, an electricity meter, a gas meter, a sprinkler, a fire alarm, a thermostat, a street light, a toaster, a sports device, a thermos, a heater or a water heater, etc.).

In certain embodiments, the electronic device may include at least one of a piece of furniture or a building/structure, an electronic board, an electronic signature receiving device, a projector, and various measurement instruments (e.g., a water meter, an electricity meter, a gas meter, or a wavelength meter).

Electronic devices according to various embodiments of the present disclosure may also include combinations of one or more of the above-mentioned devices. Further, the electronic device according to various embodiments of the present disclosure is not limited to the above-mentioned devices, which will be apparent to those skilled in the art.

In this embodiment, a Base Station (BS) may also be referred to as a base station device, which is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS), a device providing a base station function in a 3G network includes a node b (nodeb), apparatuses for providing a base station function in a 4G network include evolved node bs (enbs), which, in a Wireless Local Area Network (WLAN), the devices providing the base station function are an Access Point (AP), a device gNB providing the base station function in a New Radio (NR) of 5G, and a node B (ng-eNB) continuing to evolve, the gNB and the terminal communicate with each other by adopting NR technology, the ng-eNB and the terminal communicate with each other by adopting E-UTRA (evolved Universal Terrestrial Radio Access) technology, and both the gNB and the ng-eNB can be connected to a 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system.

The technical solution of the present invention can be applied to a 5G (5Generation) communication system, and can also be applied to various future communication systems, such as 6G and 7G.

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Example 1

The present embodiment provides a method for adjusting a time offset, as shown in fig. 1, the method for adjusting a time offset includes:

step 101, acquiring a downlink reference signal received in a current time period.

The downlink reference signal comprises at least one of a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal.

And 102, selecting a target reference signal according to the signal-to-noise ratios of all received downlink reference signals.

The target reference signal in this embodiment may be one reference signal or a signal obtained by combining a plurality of reference signals, and the specific reference signal selection mode may be selected according to actual requirements.

And 103, adjusting the time offset according to the target time offset calculated by using the target reference signal.

In this embodiment, after receiving all the downlink reference signals, the corresponding signal-to-noise ratios and the corresponding time offsets are calculated, in step 102, the target reference signal is selected according to the signal-to-noise ratios of all the downlink reference signals, and in step 103, the target time offset of the target reference signal can be directly obtained to adjust the time offset.

It should be understood that the specific manner of calculating the time offset and the specific manner of adjusting the time offset in the present embodiment can be selected from the prior art according to actual requirements, and are not considered as the improvement point of the present invention.

In this embodiment, the target reference signal may be determined according to the signal-to-noise ratios of the system synchronization block for time offset estimation, the physical downlink shared channel demodulation reference signal, and the channel state information reference signal, so that the time offset adjustment may be performed by using the target time offset calculated according to the target reference signal.

In a preferred embodiment, due to the defect that the accuracy of the system synchronization block for time offset estimation is not high, this embodiment preferably uses the pdcch demodulation reference signal and the csi reference signal for time offset adjustment.

In a specific embodiment, as shown in fig. 2, step 102 specifically includes:

and step 1021, taking the signal with the signal-to-noise ratio larger than the first threshold value in all the received downlink reference signals as a first preselected reference signal.

Step 1022, selecting the target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal.

In this embodiment, when the signal-to-noise ratios of the received specific downlink reference signals are all lower than the first threshold, the specific downlink reference signals are not used as a basis for time offset adjustment, that is, the specific downlink reference signals are not used as the first preselected reference signals.

In this embodiment, the specific signal type of the first pre-selected reference signal has multiple possibilities, and each possibility is separately exemplified below to further explain the embodiment:

in the first case: the method comprises three signals, namely a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal.

Step 1022 specifically includes: taking a signal with a high signal-to-noise ratio in a physical downlink shared channel demodulation reference signal and a channel state information reference signal as a second pre-selection reference signal;

when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the second pre-selected reference signal and a second threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or the presence of a gas in the atmosphere,

when the signal-to-noise ratio of the system synchronization block for time offset estimation is less than the sum of the signal-to-noise ratio of the second pre-selected reference signal and the second threshold: and if the signal-to-noise ratio of the channel state information reference signal is greater than or equal to the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and a third threshold, taking the channel state information reference signal as a target reference signal, and/or if the signal-to-noise ratio of the channel state information reference signal is less than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the third threshold, taking the physical downlink shared channel demodulation reference signal as the target reference signal.

In the second case: two signals are included simultaneously, and the situation comprises the following three sub-situations respectively:

the system synchronization block and the physical downlink shared channel demodulation reference signal are used for time offset estimation.

Step 1022 specifically includes: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the demodulation reference signal of the physical downlink shared channel and a fourth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and a fourth threshold, taking the physical downlink shared channel demodulation reference signal as a target reference signal; and/or the presence of a gas in the gas,

and the second step includes the demodulation reference signal of the physical downlink shared channel and the reference signal of the channel state information.

Step 1022 specifically includes: and when the signal-to-noise ratio of the channel state information reference signal is greater than or equal to the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and a fifth threshold, taking the channel state information reference signal as a target reference signal, and/or when the signal-to-noise ratio of the channel state information reference signal is less than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fifth threshold, taking the physical downlink shared channel demodulation reference signal as the target reference signal.

And thirdly, simultaneously including a system synchronization block for estimating the time offset and a channel state information reference signal.

Step 1022 specifically includes: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the channel state information reference signal and a sixth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the channel state information reference signal and a sixth threshold, taking the channel state information reference signal as a target reference signal; and/or the presence of a gas in the atmosphere,

in the third case: only one signal is included, namely only one of a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal is included.

Step 1022 specifically includes: the corresponding preselected reference signal is taken as the target reference signal.

The first threshold is greater than 0, and the second threshold, the third threshold, the fourth threshold, the fifth threshold and the sixth threshold can be selected according to actual conditions, wherein the second threshold, the fourth threshold and the sixth threshold related to the system synchronization block for time offset estimation are preferably greater than 0 due to the defect that the accuracy of the system synchronization block is limited.

In a specific embodiment, step 1021 specifically includes:

if the received downlink reference signal includes a physical downlink shared channel demodulation reference signal, when the number of physical resource blocks in a shared channel corresponding to the physical downlink shared channel demodulation reference signal is higher than a number threshold and the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal is greater than a first signal-to-noise ratio threshold, the physical downlink shared channel demodulation reference signal is used as a first pre-selection reference signal, that is, when the number of corresponding physical resource blocks is not higher than the number threshold, the physical downlink shared channel demodulation reference signal cannot be used as the first pre-selection reference signal.

Different from the system synchronization block and the channel state information reference signal, the number of resource blocks of the shared channel corresponding to the physical downlink shared channel demodulation reference signal is not fixed, and if the number of physical resource blocks is too small, the time offset calculated according to the corresponding physical downlink shared channel demodulation reference signal is unreliable, and further the time offset adjustment performed according to the time offset is also inaccurate.

In a specific embodiment, if the downlink reference signal is received in the current time period, step 104 specifically includes: adjusting the time offset after the interval time threshold according to the target time offset;

the method for adjusting time offset in this embodiment may further include: taking the time point of time offset adjustment as the starting point of the next time period; and/or the presence of a gas in the gas,

if the downlink reference signal is not received in the current time period or the received downlink reference signal does not satisfy the preset condition, the method for adjusting the time offset in the embodiment may further include: the end of the current time period is taken as the start of the next time period.

For better understanding of the present embodiment, the following description is made of a specific example:

as shown in fig. 3, in this scenario, a time Slot (Slot) is used as a time period, and in each time period, when acquiring the downlink reference signal, the software configures hardware parameters for the hardware to calculate a signal-to-noise ratio and a time offset corresponding to the reference signal.

Assuming Slot N is the current time period, if the system synchronization block, the demodulation reference Signal of the physical downlink shared channel, and the reference Signal of the channel state information for estimating the time offset are obtained in the current time period, hardware/DSP (Digital Signal Processing) will calculate the Signal-to-noise ratio and the time offset of each reference Signal respectively, software will summarize each result, and may obtain the target reference Signal according to the foregoing steps by using the summarized result, and adjust the time offset by using the time offset calculated according to the target reference Signal as the optimal time offset, that is, the target time offset.

Since the real-time adjustment of the time offset cannot be performed at the present stage, the time offset adjustment needs to be performed at an interval time threshold, and assuming that the Slot N +1 is the time threshold, the time offset adjustment is performed at the end point of the Slot N +1 (i.e., the start point of the Slot N + 2), and at this time, the time point is also used as the start point of the next time period.

It should be understood that as the technology develops, if real-time adjustment of the time offset can be achieved, the time threshold in this embodiment may be 0, that is, the time offset adjustment of the target reference signal obtained at the start point of Slot N +1 at Slot N is effective.

If at least one of a system synchronization block, a physical downlink shared channel demodulation reference signal and a channel state information reference signal for time offset estimation is not obtained in the current time period, or the obtained signal does not meet a preset condition (for example, the signal-to-noise ratio of the obtained signal is less than a first threshold; and if the number of physical resource blocks in the corresponding shared channel is not higher than a number threshold although the physical downlink shared channel demodulation reference signal is obtained), taking the end point of the current time period (the end point of Slot N (i.e. the start point of Slot N + 1)) as the start point of the next time period, and it should be understood that if the target reference signal is obtained during the time period, the effective time of target time offset adjustment is the end point of Slot N +2, i.e. the start point of Slot N + 3.

It should be understood that even when Slot N obtains at least one of a system synchronization block, a physical downlink shared channel demodulation reference signal and a channel state information reference signal for time offset estimation, Slot N +1 needs to continue receiving the aforementioned reference signal, so that when the obtained signal does not meet a preset condition, the signal obtained by Slot N +1 may be used to perform time offset calculation, thereby performing time offset adjustment to ensure timeliness of time offset adjustment.

Example 2

The present embodiment provides a time offset adjustment system, as shown in fig. 4, the time offset adjustment system includes: a signal acquisition module 201, a signal selection module 202, and a time offset adjustment module 204.

The signal obtaining module 201 is configured to obtain a downlink reference signal received in a current time period, where the downlink reference signal includes at least one of a system synchronization block used for time offset estimation, a demodulation reference signal of a physical downlink shared channel, and a channel state information reference signal.

The signal selection module 202 is configured to select a target reference signal according to the received signal-to-noise ratios of all downlink reference signals.

The target reference signal in this embodiment may be one reference signal or a signal obtained by combining multiple reference signals, and the selection mode of the specific reference signal may be selected according to actual requirements.

The time offset adjustment module 204 is configured to perform time offset adjustment according to a target time offset calculated by using the target reference signal.

In this embodiment, after receiving all downlink reference signals, corresponding signal-to-noise ratios and corresponding time offsets are calculated, the signal selection module 202 is configured to select a target reference signal according to the signal-to-noise ratios of all downlink reference signals, and the time offset adjustment module 204 is configured to directly obtain the target time offset of the target reference signal to perform time offset adjustment.

It should be understood that the specific manner of calculating the time offset and the specific manner of adjusting the time offset in the present embodiment can be selected from the prior art according to actual requirements, and is not considered as an improvement point of the present invention.

In this embodiment, the signal obtaining module 201 may obtain a system synchronization block, a demodulation reference signal of a physical downlink shared channel, and a channel state information reference signal for time offset estimation, the signal selecting module 202 may determine a target reference signal according to a signal-to-noise ratio of the signal obtained by the signal obtaining module 201, and the time offset adjusting module 204 may perform time offset adjustment by using a target time offset calculated according to the target reference signal.

In a specific embodiment, the signal selecting module 202 specifically includes: a first signal selecting unit 2021 and a target signal selecting unit 2022, where the first signal selecting unit 2021 is configured to use a signal whose signal-to-noise ratio is greater than a first threshold in all received downlink reference signals as a first pre-selected reference signal, and the target signal selecting unit 2022 is configured to select a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal.

In this embodiment, when the first signal selecting unit 2021 determines that the signal-to-noise ratios of the received specific downlink reference signals are all lower than the first threshold, the target signal selecting unit 2022 will not use the signal-to-noise ratios as the basis of the time offset adjustment, that is, will not use the signal-to-noise ratios as the first pre-selected reference signals, and the first signal selecting unit 2021 in this embodiment will only use the signal-to-noise ratios as the basis of the time offset adjustment when the signal-to-noise ratios reach the first threshold, compared with the prior art that the time offset adjustment is performed by directly adopting the time offset calculated according to the received system synchronization block, the accuracy of the time offset adjustment is improved, and further the performance of the user equipment is improved.

in the first case: the method simultaneously comprises three signals, namely simultaneously comprises a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal.

The target signal selecting unit 2022 is specifically configured to, if the first pre-selection reference signal includes a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal, and a channel state information reference signal at the same time, take a signal with a high signal-to-noise ratio in the physical downlink shared channel demodulation reference signal and the channel state information reference signal as a second pre-selection reference signal:

The target signal selecting unit 2022 is specifically configured to, when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fourth threshold, use the system synchronization block for time offset estimation as the target reference signal; and/or when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the demodulation reference signal of the physical downlink shared channel and a fourth threshold, taking the demodulation reference signal of the physical downlink shared channel as a target reference signal.

The target signal selecting unit 2022 is specifically configured to use the channel state information reference signal as the target reference signal when the signal-to-noise ratio of the channel state information reference signal is greater than or equal to the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fifth threshold, and/or use the physical downlink shared channel demodulation reference signal as the target reference signal when the signal-to-noise ratio of the channel state information reference signal is less than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fifth threshold.

And thirdly, simultaneously including a system synchronization block and a channel state information reference signal for time offset estimation.

The target signal selecting unit 2022 is specifically configured to use the system synchronization block for time offset estimation as the target reference signal when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the channel state information reference signal and the sixth threshold; and/or when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the channel state information reference signal and a sixth threshold, taking the channel state information reference signal as a target reference signal.

The target signal selection unit 2022 is specifically configured to use the corresponding preselected reference signal as the target reference signal.

In a specific embodiment, the first signal selecting unit 2021 is specifically configured to, if the received downlink reference signal includes a physical downlink shared channel demodulation reference signal, take the physical downlink shared channel demodulation reference signal as the first pre-selection reference signal when the number of physical resource blocks in a shared channel corresponding to the physical downlink shared channel demodulation reference signal is higher than a number threshold and the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal is greater than a first signal-to-noise ratio threshold.

In a specific embodiment, the time offset adjustment system may further include: a signal judgment module 205 and a time determination module 206;

the signal determining module 205 is configured to, if a downlink reference signal is received in a current time period, invoke the signal obtaining module 201, the signal selecting module 202, the time offset calculating module 203, and the time offset adjusting module 204, where the time offset adjusting module 204 is specifically configured to perform time offset adjustment after an interval time threshold according to a target time offset; the time determining module 206 is configured to use a time point for performing time offset adjustment as a starting point of a next time period; and/or the presence of a gas in the gas,

the signal determining module 205 is configured to invoke the time determining module 206 if the downlink reference signal is not received in the current time period or the received downlink reference signal does not satisfy the preset condition, and the time determining module 206 is configured to use an end point of the current time period as a starting point of a next time period.

as shown in fig. 3, in this scenario, a time slot is used as a time period, and in each time period, when acquiring the downlink reference signal, the software configures hardware parameters for the hardware to calculate the signal-to-noise ratio and the time offset corresponding to the reference signal.

Assuming Slot N is the current time period, if a system synchronization block, a demodulation reference signal of a physical downlink shared channel, and a reference signal of channel state information for time offset estimation are obtained in the current time period, a hardware/DSP calculates a signal-to-noise ratio and a time offset of each reference signal, respectively, software summarizes the results, may obtain a target reference signal according to the foregoing manner using the summarized results, and performs time offset adjustment by using the time offset calculated according to the target reference signal as an optimal time offset, that is, a target time offset.

It should be understood that even when the Slot N obtains at least one of a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal, the Slot N +1 needs to continue receiving the aforementioned reference signal, so that when the obtained signal does not meet a preset condition, the signal obtained by the Slot N +1 can be used for time offset calculation, thereby performing time offset adjustment to ensure timeliness of the time offset adjustment.

Example 3

The present embodiment provides an electronic device, which may be represented in the form of a computing device (for example, may be a server device), and includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the time offset adjustment method in embodiment 1.

Fig. 5 shows a schematic diagram of a hardware structure of the embodiment, and as shown in fig. 5, the electronic device 9 specifically includes:

at least one processor 91, at least one memory 92, and a bus 93 for connecting the various system components (including the processor 91 and the memory 92), wherein:

the bus 93 includes a data bus, an address bus, and a control bus.

Memory 92 includes volatile memory, such as Random Access Memory (RAM)921 and/or cache memory 922, and can further include Read Only Memory (ROM) 923.

Memory 92 also includes a program/utility 925 having a set (at least one) of program modules 924, such program modules 924 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.

The processor 91 executes various functional applications and data processing, such as the time offset adjustment method in embodiment 1 of the present invention, by running the computer program stored in the memory 92.

The electronic device 9 may further communicate with one or more external devices 94 (e.g., a keyboard, a pointing device, etc.). Such communication may be through an input/output (I/O) interface 95. Also, the electronic device 9 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via the network adapter 96. The network adapter 96 communicates with the other modules of the electronic device 9 via the bus 93. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 9, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.

It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module, according to embodiments of the application. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.

Example 4

The present embodiment provides a computer-readable storage medium on which a computer program is stored, the program implementing the time offset adjustment method in embodiment 1 when executed by a processor.

More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.

In a possible implementation manner, the present invention can also be implemented in the form of a program product, which includes program code for causing a terminal device to execute the time offset adjustment method in embodiment 1 when the program product runs on the terminal device.

Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may be executed entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A method for adjusting time offset, the method comprising:

acquiring a downlink reference signal received in a current time period, wherein the downlink reference signal comprises at least one of a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal and a channel state information reference signal;

adjusting the time offset according to the target time offset calculated by using the target reference signal;

the step of selecting the target reference signal according to the received signal-to-noise ratios of all downlink reference signals specifically includes:

taking signals with signal-to-noise ratios larger than a first threshold value in all received downlink reference signals as first preselected reference signals;

selecting a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal;

the step of selecting a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal specifically comprises:

2. The method of adjusting time offset according to claim 1, wherein said selecting a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal specifically comprises:

if the preselected reference signal only comprises a system synchronization block for time offset estimation and a demodulation reference signal of a physical downlink shared channel: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the demodulation reference signal of the physical downlink shared channel and a fourth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or, when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fourth threshold, taking the physical downlink shared channel demodulation reference signal as a target reference signal; and/or the presence of a gas in the gas,

if the preselected reference signal only comprises a demodulation reference signal of a physical downlink shared channel and a reference signal of channel state information: when the signal-to-noise ratio of the channel state information reference signal is greater than or equal to the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and a fifth threshold, taking the channel state information reference signal as a target reference signal, and/or when the signal-to-noise ratio of the channel state information reference signal is less than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fifth threshold, taking the physical downlink shared channel demodulation reference signal as a target reference signal; and/or the presence of a gas in the atmosphere,

3. The method for adjusting time offset according to claim 1, wherein the step of using the signal with the signal-to-noise ratio greater than the first threshold in all the received downlink reference signals as the first pre-selected reference signal comprises:

4. The method of claim 1, wherein if the downlink reference signal is received in the current time period, the step of adjusting the time offset according to the target time offset specifically comprises: adjusting the time offset after the interval time threshold according to the target time offset;

5. A time offset adjustment system, comprising: the device comprises a signal acquisition module, a signal selection module and a time offset adjustment module;

the time offset adjusting module is used for adjusting time offset according to target time offset calculated by using the target reference signal;

the signal selection module specifically comprises: a first signal selection unit and a target signal selection unit;

the target signal selection unit is used for selecting a target reference signal according to the signal-to-noise ratio of the first pre-selected reference signal;

the target signal selection unit is specifically configured to, if the first pre-selection reference signal includes a system synchronization block for time offset estimation, a physical downlink shared channel demodulation reference signal, and a channel state information reference signal at the same time, use a signal with a high signal-to-noise ratio in the physical downlink shared channel demodulation reference signal and the channel state information reference signal as a second pre-selection reference signal:

6. The system of claim 5, wherein the target signal selection unit is specifically configured to, if the pre-selected reference signal only includes the system synchronization block and the physical downlink shared channel demodulation reference signal for time offset estimation: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and a fourth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal and the fourth threshold, taking the physical downlink shared channel demodulation reference signal as a target reference signal; and/or the presence of a gas in the gas,

if the preselected reference signal only includes a system synchronization block and a csi reference signal for timing offset estimation: when the signal-to-noise ratio of the system synchronization block for time offset estimation is greater than or equal to the sum of the channel state information reference signal and a sixth threshold, taking the system synchronization block for time offset estimation as a target reference signal; and/or when the signal-to-noise ratio of the system synchronization block for time offset estimation is smaller than the sum of the signal-to-noise ratio of the channel state information reference signal and the sixth threshold, taking the channel state information reference signal as a target reference signal; and/or the presence of a gas in the gas,

7. The system according to claim 5, wherein the first signal selecting unit is specifically configured to, if the received downlink reference signal includes a physical downlink shared channel demodulation reference signal, use the physical downlink shared channel demodulation reference signal as the first pre-selection reference signal when the number of physical resource blocks in a shared channel corresponding to the physical downlink shared channel demodulation reference signal is higher than a number threshold and the signal-to-noise ratio of the physical downlink shared channel demodulation reference signal is greater than a first signal-to-noise ratio threshold.

8. The time offset adjustment system of claim 5, further comprising: the device comprises a signal judgment module and a time determination module;

the signal judgment module is used for calling the signal acquisition module, the signal selection module and the time offset adjustment module if the downlink reference signal is received in the current time period, and the time offset adjustment module is specifically used for adjusting the time offset after an interval time threshold according to the target time offset;

the time determining module is used for taking the time point of time offset adjustment as the starting point of the next time period; and/or the presence of a gas in the atmosphere,

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the time offset adjustment method according to any one of claims 1 to 4 when executing the computer program.

10. A computer-readable storage medium, on which a computer program is stored, the computer program, when being executed by a processor, implementing the time offset adjustment method according to any one of claims 1 to 4.