CN113507352B - Time offset adjusting method, system, electronic device and storage medium - Google Patents
Time offset adjusting method, system, electronic device and storage medium Download PDFInfo
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- CN113507352B CN113507352B CN202110679056.4A CN202110679056A CN113507352B CN 113507352 B CN113507352 B CN 113507352B CN 202110679056 A CN202110679056 A CN 202110679056A CN 113507352 B CN113507352 B CN 113507352B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a time offset adjusting method, a time offset adjusting system, electronic equipment and a storage medium, wherein the method comprises the following steps: if the signal-to-noise ratios of all system synchronization blocks received in the current time period are lower than a first signal-to-noise ratio threshold value, acquiring a first target time offset; and adjusting the time offset according to the first target time offset. In the invention, when no TRS exists, if the signal-to-noise ratios of all the received system synchronization blocks used for time offset estimation in the current time period are lower than a first signal-to-noise ratio threshold, time offset adjustment is carried out according to the demodulation reference signals of the physical downlink shared channel.
Description
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 ue and the base station, such as asynchronization of a crystal oscillator, there is always a certain time offset, and the ue calculates and corrects the time offset (referred to as time offset in this application) by tracking a reference signal periodically transmitted by the base station, so as to adjust the receiving time of the ue, and the more accurate the adjustment is, the better the resolving capability of the ue 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 no reference signal for tracking channel state information is 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 provides a time offset adjustment method, a system, an electronic device and a storage medium, which improve the time offset adjustment accuracy under the condition of not configuring a reference signal for tracking channel state information, and aims to overcome the defect of inaccurate time offset adjustment caused by directly using a system synchronization block for time offset estimation to estimate time offset under the condition of not configuring the reference signal for tracking channel state information in the prior art.
The invention solves the technical problems through the following technical scheme:
the invention provides a time offset adjusting method, which comprises the following steps:
if the signal-to-noise ratios of all system synchronization blocks received in the current time period are lower than a first signal-to-noise ratio threshold value, acquiring a first target time offset, wherein the first target time offset is calculated according to a physical downlink shared channel demodulation reference signal received in the current time period;
and adjusting the time bias according to the first target time bias.
Preferably, the step of obtaining the first target time offset specifically includes the following steps:
if the number of physical resource blocks in a shared channel corresponding to the received physical downlink shared channel demodulation reference signal is higher than a number threshold, taking the corresponding shared channel demodulation reference signal as a preselected reference signal;
and taking the time offset calculated according to the preselected reference signal as a first target time offset.
Preferably, the step of using the time offset calculated according to the preselected reference signal as the first target time offset specifically includes:
taking the signal with the highest signal-to-noise ratio in all the preselected reference signals in the current time period as a target reference signal;
and taking the time offset calculated according to the target reference signal as a first target time offset.
Preferably, the step of using the corresponding common channel demodulation reference signal as the pre-selection reference signal specifically includes: taking the corresponding shared channel demodulation reference signal as a first pre-selection reference signal;
the step of using the signal with the highest signal-to-noise ratio in all the preselected reference signals in the current time period as the target reference signal specifically includes the following steps:
taking a signal with a signal-to-noise ratio higher than a second signal-to-noise ratio threshold value in the first pre-selected reference signal as a second pre-selected reference signal;
and taking the signal with the highest signal-to-noise ratio in all the second preselected reference signals in the current time period as a target reference signal.
Preferably, the method for adjusting time offset further includes the following steps:
if a system synchronization block not lower than the first signal-to-noise ratio threshold value is received in the current time period, acquiring a second target time offset, wherein the second target time offset is the time offset calculated according to the system synchronization block;
and adjusting the time offset according to the second target time offset.
Preferably, the step of adjusting the time offset according to the second target time offset further includes the following steps:
and taking the time corresponding to the system synchronization block as the starting time of the next time period.
The invention also provides a time offset adjusting system, which comprises: the device comprises a first time offset acquisition module and a first time offset adjustment module;
the first time offset obtaining module is configured to obtain a first target time offset if signal-to-noise ratios of all system synchronization blocks received in a current time period are lower than a first signal-to-noise ratio threshold, where the first target time offset is a time offset calculated according to a physical downlink shared channel demodulation reference signal received in the current time period;
the first time offset adjusting module is used for adjusting the time offset according to the first target time offset.
Preferably, the first time offset obtaining module specifically includes: a preselected signal determining unit and a target time offset determining unit;
the pre-selection signal determining unit is configured to, if the number of physical resource blocks in a shared channel corresponding to the received physical downlink shared channel demodulation reference signal is higher than a number threshold, take the corresponding shared channel demodulation reference signal as a pre-selection reference signal;
the target time offset determining unit is used for taking the time offset calculated according to the preselected reference signal as a first target time offset.
Preferably, the target time offset determining unit is specifically configured to use a signal with a highest signal-to-noise ratio in all the preselected reference signals in the current time period as a target reference signal; and taking the time offset calculated according to the target reference signal as a first target time offset.
Preferably, the pre-selection signal determining unit is specifically configured to use the corresponding common channel demodulation reference signal as a first pre-selection reference signal;
and the target time offset determining unit is used for taking a signal with a signal-to-noise ratio higher than a second signal-to-noise ratio threshold value in the first preselected reference signal as a second preselected reference signal, and taking a signal with a highest signal-to-noise ratio in all the second preselected reference signals in the current time period as a target reference signal.
Preferably, the system for adjusting time bias further includes a second time bias obtaining module and a second time bias adjusting module:
the second time offset obtaining module is used for obtaining a second target time offset if a system synchronization block which is not lower than the first signal-to-noise ratio threshold value is received in the current time period, wherein the second target time offset is calculated according to the system synchronization block;
and the second time offset adjusting module is used for adjusting the time offset according to the second target time offset.
Preferably, the time offset adjustment system further includes a time determining module, configured to use a time corresponding to the system synchronization block as a starting time of a 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, when no reference signal for tracking channel state information exists, if the signal-to-noise ratios of all the received system synchronization blocks in the current time period are lower than a first signal-to-noise ratio threshold, time offset adjustment is carried out according to the demodulation reference signal of the physical downlink shared channel.
Drawings
Fig. 1 is a flowchart of a time offset adjustment method in embodiment 1 of the present invention.
Fig. 2 is a flowchart of an implementation manner of step 101 in embodiment 1 of the present invention.
Fig. 3 is a partial flowchart of a time offset adjustment method in embodiment 1 of the present invention.
Fig. 4 is a schematic time period diagram in a specific scenario in embodiment 1 of the present invention.
Fig. 5 is a schematic time period diagram in another specific scenario in embodiment 1 of the present invention.
Fig. 6 is a block diagram of a time offset adjustment system in embodiment 2 of the present invention.
Fig. 7 is a 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 an intelligent household 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 panel, a security control panel, a TV box, a game console, 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 (e.g., 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); an in-vehicle infotainment device; marine electronics (e.g., a ship 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.
A Base Station (BS) in this embodiment of the present application, which may also be referred to as a base station device, 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), and in a Wireless Local Area Network (WLAN), the devices providing the base station function are Access Point (AP), gNB providing the base station function in New Radio (NR), and node B for continuing evolution (ng-eNB), the gNB and the terminal communicate with each other by adopting an NR (NR) technology, the ng-eNB and the terminal communicate with each other by adopting an 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 invention thereto.
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:
The first target time offset is a time offset calculated according to a demodulation reference signal of a physical downlink shared channel received in a current time period.
In a preferred embodiment, the time period is set to be a multiple of an interval between two SSBs before and after the time period is a preset time period, for example, 40 slots (slots) are used as the time period, and further, for example, 80 slots are used as the time period, so as to simplify the calculation and improve the calculation efficiency, and if the interval between two SSBs before and after the time period is 40 slots, the time period is set to be 40n (n is 1, 2, 3, 4 … …).
And 102, adjusting the time offset according to the first target time offset.
It should be understood that the specific manner of adjusting the time offset in the present embodiment can be selected from the prior art according to actual requirements, which is not an improvement point of the present invention.
In this embodiment, after the first target time offset is obtained, the next time period is entered while performing time offset adjustment according to the first target time offset, and the time offset adjustment method in this embodiment is continuously executed by taking the next time period as the current time period.
In this embodiment, when a plurality of first target time offsets are received in the current time period, one first target time offset may be selected according to actual requirements to perform time offset adjustment, or time offset adjustment may be performed by combining a plurality of first target time offsets.
In this embodiment, when there is no TRS, if the signal-to-noise ratios of all the received system synchronization blocks in the current time period are lower than the first signal-to-noise ratio threshold, the time offset adjustment is performed according to the physical downlink shared channel demodulation reference signal.
In a specific implementation manner, as shown in fig. 2, the step of acquiring the first target time offset in step 101 specifically includes:
Specifically, the embodiment may further store the relevant data (such as the signal-to-noise ratio and the time offset) of the preselected reference signal in the buffer for facilitating the subsequent use, and for the relevant data of the non-preselected reference signal, the relevant data does not need to be stored in the buffer to save the system resources.
Different from a system synchronization block, the number of resource blocks of a shared channel corresponding to a physical downlink shared channel demodulation reference signal is not fixed, 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 preferred embodiment, step 1012 specifically includes the following steps:
taking the signal with the highest signal-to-noise ratio in all the preselected reference signals in the current time period as a target reference signal;
and taking the time offset calculated according to the target reference signal as a first target time offset.
In this embodiment, the signal with the highest signal-to-noise ratio is used as the target reference signal, and the time offset is adjusted by using the time offset calculated according to the target reference signal, so that the accuracy of time offset adjustment is further improved.
In a specific embodiment, the preselected reference signal in step 1011 is a first preselected reference signal, and the step of using the signal with the highest signal-to-noise ratio in all the preselected reference signals in the current time period as the target reference signal in step 1012 specifically includes the steps of:
taking a signal with a signal-to-noise ratio higher than a second signal-to-noise ratio threshold value in the first pre-selected reference signal as a second pre-selected reference signal;
and taking the signal with the highest signal-to-noise ratio in all the second preselected reference signals in the current time period as the target reference signal.
When the first preselected reference signal is lower than the second signal-to-noise ratio threshold, it is indicated that the signal strength of the signal is not good, and the accuracy of the first target time offset calculated by the signal with poor signal strength is not high, so that the signal may become a signal for adjusting the time offset only when the signal-to-noise ratio is higher than the second signal-to-noise ratio threshold.
As shown in fig. 3, in a specific implementation manner, the method for adjusting a time offset in this embodiment may further include the following steps:
Wherein the second target time offset is a time offset calculated according to the system synchronization block;
and step 202, adjusting the time offset according to the second target time offset.
In this embodiment, if the signal-to-noise ratio of the system synchronization block received in the current time period is not lower than the first signal-to-noise ratio threshold, it is indicated that the signal of the system synchronization block is reliable, and the signal can be used as an adjustment basis to directly perform time offset adjustment by using the time offset calculated by the system synchronization block.
Further, step 203 is included after step 202, and the time corresponding to the system synchronization block is taken as the starting time of the next time period.
At this time, the next time period is the current period for adjusting, and the above steps are continuously executed to continuously adjust the time offset from the start time.
For a better understanding of the present embodiment, the following description is given by way of a specific example:
as shown in FIG. 4, assume that the start of the current time period is t 0 End point is t 1 If t is 0 To t 1 And in the time period, receiving a system synchronization block with the signal-to-noise ratio not lower than a first signal-to-noise ratio threshold value, acquiring a second target time offset calculated according to the system synchronization block, and parallelly adjusting the time offset by using the time offset. At the same time, the system is synchronized with the block pairThe time is taken as the starting time of the next time period. E.g. at a point in time t x When a system synchronization block with a signal-to-noise ratio not lower than a first signal-to-noise ratio threshold is received, a time offset adjustment is performed based on a time offset calculated by the system synchronization block, and t is calculated x As the start time of the next time period.
As shown in fig. 5, if t 0 To t 1 If the number of physical resource blocks in the shared channel corresponding to the demodulation reference signal of the physical downlink shared channel received in the period is not higher than the number threshold at this time, the time offset adjustment is not performed in the time period.
In this embodiment, if the signal-to-noise ratios in all the first preselected reference signals in the time period are not higher than the second signal-to-noise ratio threshold, the time offset adjustment is not performed in the time period.
And taking the signal with the highest signal-to-noise ratio in all the second preselected reference signals in the current time period as a target reference signal, taking the time offset calculated according to the target reference signal as a first target time offset, and adjusting the time offset by using the first target time offset. E.g., at this time, t y And taking the signal with the highest signal-to-noise ratio in the second pre-selected reference signal as the receiving point of the target reference signal. At the same time, let t 1 As the start time for the next time period.
Example 2
The present embodiment provides a time offset adjustment system, as shown in fig. 6, the time offset adjustment system includes: a first time offset obtaining module 301 and a first time offset adjusting module.
The first time offset obtaining module 301 is configured to obtain a first target time offset if the signal-to-noise ratios of all system synchronization blocks received in the current time period are lower than a first signal-to-noise ratio threshold, where the first target time offset is a time offset calculated according to a physical downlink shared channel demodulation reference signal received in the current time period.
In a preferred embodiment, the time period is set to be a multiple of an interval between two SSBs before and after the time period is a preset time period, for example, 40 slots are used as the time period, and further, for example, 80 slots are used as the time period, so as to simplify the calculation and improve the calculation efficiency, and if the interval between two SSBs before and after the time period is 30 slots, the time period is set to be 30n (n is 1, 2, 3, 4 … …).
The first time offset adjusting module is used for adjusting the time offset according to the first target time offset.
It should be understood that the specific manner of adjusting the time offset in the present embodiment can be selected from the prior art according to actual requirements, which is not an improvement point of the present invention.
In this embodiment, after the first target time offset is obtained, the next time period is entered while the time offset is adjusted according to the first target time offset, and the time offset adjustment method in this embodiment is continuously executed with the next time period as the current time period.
In this embodiment, when a plurality of first target time offsets are received in the current time period, one first target time offset may be selected according to actual requirements to perform time offset adjustment, or time offset adjustment may be performed by combining a plurality of first target time offsets.
In this embodiment, when there is no TRS, if the snrs of all the system synchronization blocks received in the current time period are lower than the first snr threshold, the time offset adjustment is performed according to the demodulation reference signal of the physical downlink shared channel.
In a specific implementation manner, the first time offset obtaining module 301 specifically includes: a preselected signal determining unit 3011 and a target time offset determining unit 3012.
The preselected signal determining unit 3011 is configured to, if the number of physical resource blocks in the shared channel corresponding to the received physical downlink shared channel demodulation reference signal is higher than the number threshold, use the corresponding shared channel demodulation reference signal as a preselected reference signal.
Specifically, the embodiment may further store the relevant data (such as the signal-to-noise ratio and the time offset) of the preselected reference signal in the buffer for facilitating the subsequent use, and for the relevant data of the non-preselected reference signal, the relevant data does not need to be stored in the buffer to save the system resources.
The target time offset determination unit 3012 is configured to set a time offset calculated from a preselected reference signal as a first target time offset.
Different from a system synchronization block, the number of resource blocks of a shared channel corresponding to a physical downlink shared channel demodulation reference signal is not fixed, and if the number of the 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 according to the time offset is also inaccurate.
In a preferred embodiment, the target time offset determining unit 3012 is specifically configured to use a signal with the highest signal-to-noise ratio in all the preselected reference signals in the current time period as the target reference signal; and taking the time offset calculated according to the target reference signal as a first target time offset.
In this embodiment, the signal with the highest signal-to-noise ratio is used as the target reference signal, and the time offset is adjusted by using the time offset calculated according to the target reference signal, so that the accuracy of the time offset adjustment is further improved.
In a specific embodiment, the pre-selection signal determining unit 3011 is specifically configured to use the corresponding shared channel demodulation reference signal as the first pre-selection reference signal;
the target time offset determining unit 3012 is configured to use, as the second preselected reference signal, a signal in the first preselected reference signal whose signal-to-noise ratio is higher than the second signal-to-noise ratio threshold, and use, as the target reference signal, a signal in all the second preselected reference signals whose signal-to-noise ratio is highest in the current time period.
When the first preselected reference signal is lower than the second signal-to-noise ratio threshold, it is indicated that the signal strength of the signal is not good, and the accuracy of the first target time offset calculated by the signal with poor signal strength is not high, so that the signal may become a signal for adjusting the time offset only when the signal-to-noise ratio is higher than the second signal-to-noise ratio threshold.
In one embodiment, the system further includes a second time offset obtaining module 303 and a second time offset adjusting module 304.
The second time offset obtaining module 303 is configured to obtain a second target time offset if the system synchronization block that is not lower than the first signal-to-noise ratio threshold is received in the current time period, where the second target time offset is a time offset calculated according to the system synchronization block, and the second time offset adjusting module 304 is configured to perform time offset adjustment according to the second target time offset.
In this embodiment, if the signal-to-noise ratio of the system synchronization block received in the current time period is not lower than the first signal-to-noise ratio threshold, it is indicated that the signal of the system synchronization block is reliable, and the signal can be used as an adjustment basis to directly perform time offset adjustment by using the time offset calculated by the system synchronization block.
Further, the time offset adjustment system may further include a time determination module 305, configured to use a time corresponding to the system synchronization block as a starting time of the next time period.
At this time, the next time period is the current period for adjusting, and the above steps are continuously executed to continuously adjust the time offset from the start time.
For a better understanding of the present embodiment, the following description is given by way of a specific example:
as shown in FIG. 4, assume that the start of the current time period is t 0 End point is t 1 If t is 0 To t 1 And in the time period, receiving a system synchronization block with the signal-to-noise ratio not lower than a first signal-to-noise ratio threshold value, acquiring a second target time offset calculated according to the system synchronization block, and parallelly adjusting the time offset by using the time offset. Meanwhile, the time corresponding to the system synchronization block is used as the starting time of the next time period. E.g. at a point in time t x When a system synchronization block with a signal-to-noise ratio not lower than a first signal-to-noise ratio threshold is received, a time offset adjustment is performed based on a time offset calculated by the system synchronization block, and t is calculated x As the start time of the next time period.
As shown in fig. 5, if t 0 To t 1 In this embodiment, if the number of physical resource blocks in the shared channel corresponding to all the physical downlink shared channel demodulation reference signals received in the period is not higher than the number threshold, then no time offset adjustment is performed in the time period.
In this embodiment, if the signal-to-noise ratios of all the first preselected reference signals in the time period are not higher than the second signal-to-noise ratio threshold, the time offset adjustment is not performed in the time period.
And taking the signal with the highest signal-to-noise ratio in all the second preselected reference signals in the current time period as a target reference signal, taking the time offset calculated according to the target reference signal as a first target time offset, and adjusting the time offset by using the first target time offset. E.g., at this time, t y And taking the signal with the highest signal-to-noise ratio in the second pre-selected reference signal as the receiving point of the target reference signal. At the same time, will t 1 As the start time of the next time period.
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. 7 shows a schematic diagram of a hardware structure of the present embodiment, and as shown in fig. 6, the electronic device 9 specifically includes:
at least one processor 91, at least one memory 92, and a bus 93 for connecting the different 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.
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 executing 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 (12)
1. A method for adjusting time offset, the method comprising:
if the signal-to-noise ratios of all system synchronization blocks received in the current time period are lower than a first signal-to-noise ratio threshold value, acquiring a first target time offset, wherein the first target time offset is calculated according to a physical downlink shared channel demodulation reference signal received in the current time period;
adjusting the time bias according to the first target time bias;
the step of obtaining the first target time offset specifically includes the following steps:
if the number of physical resource blocks in a shared channel corresponding to the received physical downlink shared channel demodulation reference signal is higher than a number threshold, taking the corresponding shared channel demodulation reference signal as a preselected reference signal;
and taking the time offset calculated according to the preselected reference signal as a first target time offset.
2. The method according to claim 1, wherein the step of using the time offset calculated from the preselected reference signal as the first target time offset comprises:
taking the signal with the highest signal-to-noise ratio in all the preselected reference signals in the current time period as a target reference signal;
and taking the time offset calculated according to the target reference signal as a first target time offset.
3. The method for adjusting time offset according to claim 2, wherein the step of using the corresponding common channel demodulation reference signal as the pre-selection reference signal specifically comprises: taking the corresponding shared channel demodulation reference signal as a first pre-selection reference signal;
the step of using the signal with the highest signal-to-noise ratio in all the preselected reference signals in the current time period as the target reference signal specifically includes the following steps:
taking a signal with a signal-to-noise ratio higher than a second signal-to-noise ratio threshold value in the first pre-selected reference signal as a second pre-selected reference signal;
and taking the signal with the highest signal-to-noise ratio in all the second preselected reference signals in the current time period as a target reference signal.
4. The method of adjusting time offset according to claim 1, wherein the method further comprises the steps of:
if a system synchronization block not lower than the first signal-to-noise ratio threshold value is received in the current time period, acquiring a second target time offset, wherein the second target time offset is the time offset calculated according to the system synchronization block;
and adjusting the time offset according to the second target time offset.
5. The method according to claim 4, wherein the step of adjusting the time offset according to the second target time offset further comprises the following steps:
and taking the time corresponding to the system synchronization block as the starting time of the next time period.
6. A time offset adjustment system, comprising: the device comprises a first time bias acquisition module and a first time bias adjustment module;
the first time offset obtaining module is configured to obtain a first target time offset if signal-to-noise ratios of all system synchronization blocks received in a current time period are lower than a first signal-to-noise ratio threshold, where the first target time offset is a time offset calculated according to a physical downlink shared channel demodulation reference signal received in the current time period;
the first time offset adjusting module is used for adjusting the time offset according to the first target time offset;
the first time offset obtaining module specifically includes: a preselected signal determining unit and a target time bias determining unit;
the preselection signal determining unit is used for taking the corresponding shared channel demodulation reference signal as a preselection reference signal if the number of physical resource blocks in the shared channel corresponding to the received physical downlink shared channel demodulation reference signal is higher than a number threshold;
the target time offset determining unit is used for taking the time offset calculated according to the preselected reference signal as a first target time offset.
7. The system according to claim 6, wherein the target time offset determining unit is specifically configured to use a signal with a highest signal-to-noise ratio among all the preselected reference signals in the current time period as a target reference signal; and taking the time offset calculated according to the target reference signal as a first target time offset.
8. The time offset adjustment system according to claim 7, wherein the pre-selection signal determining unit is specifically configured to use the corresponding shared channel demodulation reference signal as the first pre-selection reference signal;
and the target time offset determining unit is used for taking a signal with a signal-to-noise ratio higher than a second signal-to-noise ratio threshold value in the first preselected reference signal as a second preselected reference signal, and taking a signal with a highest signal-to-noise ratio in all the second preselected reference signals in the current time period as a target reference signal.
9. The system of claim 6, further comprising a second time offset obtaining module and a second time offset adjusting module:
the second time offset obtaining module is used for obtaining a second target time offset if a system synchronization block which is not lower than the first signal-to-noise ratio threshold value is received in the current time period, wherein the second target time offset is calculated according to the system synchronization block;
and the second time offset adjusting module is used for adjusting the time offset according to the second target time offset.
10. The system of claim 9, further comprising a time determination module configured to use a time corresponding to the system synchronization block as a starting time of a next time period.
11. 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 5 when executing the computer program.
12. 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 5.
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