CN116723565A

CN116723565A - Synchronization method, device, equipment, medium and product of terminal and base station

Info

Publication number: CN116723565A
Application number: CN202310614716.XA
Authority: CN
Inventors: 唐胜志
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-09-08

Abstract

According to the method, the device, the equipment, the medium and the product for synchronizing the terminal and the base station, when the terminal equipment is detected to wake up from the dormant state, the dormant type of the terminal equipment can be determined, the dormant type is long-time dormant or short-time dormant, then the current working scene of the terminal equipment is determined, the working scene is a high-speed motion scene or a non-high-speed motion scene, and time domain resources and frequency domain resources between the terminal equipment and the base station are synchronized based on the dormant type and the working scene of the terminal equipment. The application can realize the synchronization of the time domain resource and the frequency domain resource between the terminal equipment and the base station more finely based on the working scene and the sleeping time length of the terminal equipment so as to realize the synchronization under the condition of lower power consumption.

Description

Synchronization method, device, equipment, medium and product of terminal and base station

Technical Field

The present application relates to communications technologies, and in particular, to a method, an apparatus, a device, a medium, and a product for synchronizing a terminal with a base station.

Background

In a new radio access technology (New Radio Access Technology, NR) system, a terminal device needs to monitor a message of a base station, but there is a time period without interaction between the terminal device and the base station, the terminal device is in an idle state where no message reception and no message transmission are performed, and in order to save power, the terminal device has a discontinuous reception (Discontinuous Reception, DRX) mechanism, so that the terminal device enters a sleep mode during the idle time period.

However, after the terminal device is dormant for a long time, the terminal device and the base station lose synchronization due to the influence of the environment change (such as relative motion and clock instability) of the communication link, that is, the problems of time offset and/or frequency offset and the like are generated, so that the accuracy of receiving data and transmitting data between the terminal device and the base station is low.

How to synchronize the time domain resources between the terminal equipment and the base station after the terminal equipment wakes up in a dormant state is needed to be solved.

Disclosure of Invention

The application provides a method, a device, equipment, a medium and a product for synchronizing a terminal and a base station, which solve the problems of time domain resource synchronization and frequency domain resource synchronization between the terminal equipment and the base station after the terminal equipment is in dormancy and awakens.

In a first aspect, the present application provides a method for synchronizing a terminal with a base station, including:

when the terminal equipment is detected to wake up from a dormant state, determining the dormant type of the terminal equipment, wherein the dormant type is long-time dormant or short-time dormant;

determining a current working scene of the terminal equipment, wherein the working scene is a high-speed motion scene or a non-high-speed motion scene;

and synchronizing time domain resources and frequency domain resources between the terminal equipment and the base station based on the dormancy type and the working scene.

In one possible implementation manner, based on the dormancy type and the operation scenario, synchronizing time domain resources and frequency domain resources between the terminal device and the base station includes:

determining a synchronous mode according to the dormancy type and the working scene;

and synchronizing the time domain resource and the frequency domain resource between the terminal equipment and the base station according to the synchronization mode.

In one possible implementation manner, determining a synchronization manner according to the dormancy type and the working scene includes:

if the dormancy type is short-time dormancy and the working scene is a non-high-speed motion scene, determining that the synchronization mode is: synchronizing time domain resources and frequency domain resources according to a physical broadcast channel PBCH in a synchronous signal block SSB signal;

if the dormancy type is long-time dormancy and the working scene is a high-speed motion scene, determining that the synchronization mode is: performing first synchronization of time domain resources according to a primary synchronization signal PSS and a secondary synchronization signal SSS in an SSB signal, and performing second synchronization of the time domain resources and the frequency domain resources based on a result of the first synchronization and a PBCH;

If the dormancy type is short-time dormancy and the working scene is a high-speed motion scene, determining that the synchronization mode is: performing first synchronization of frequency domain resources according to PSS and SSS in an SSB signal, and performing second synchronization of time domain resources and frequency domain resources based on the result of the first synchronization and PBCH;

if the dormancy type is long-time dormancy and the working scene is a non-high-speed motion scene, determining that the synchronization mode is: performing first synchronization of time domain resources and frequency domain resources according to PSS and SSS in an SSB signal, and performing second synchronization of the time domain resources and the frequency domain resources based on the result of the first synchronization and PBCH;

wherein the accuracy of the first synchronization is less than the accuracy of the second synchronization.

In one possible implementation manner, determining the sleep type of the terminal device includes:

acquiring the dormancy time of the terminal equipment in the dormancy state;

if the dormancy time length is greater than a preset threshold value, determining that the dormancy type of the terminal equipment is long-time dormancy;

and if the dormancy duration is smaller than or equal to the preset threshold value, determining that the dormancy type of the terminal equipment is short-time dormancy.

In one possible implementation, the method further includes:

acquiring an SSB signal;

synchronous demodulation is carried out through the SSB signals, and blind detection is carried out on a physical downlink control channel PDCCH, so that a blind detection result is obtained;

determining the maximum time domain resource offset and the maximum frequency domain resource offset which can be born by the terminal equipment according to the blind detection result;

and determining the preset threshold according to the maximum time domain resource offset and the maximum frequency domain resource offset.

In one possible implementation manner, determining the preset threshold according to the maximum time domain resource offset and the maximum frequency domain resource offset includes:

acquiring a corresponding relation, wherein the corresponding relation comprises a plurality of time intervals, and a time domain resource offset and a frequency domain resource offset corresponding to each time interval;

in the corresponding relation, determining a target time interval corresponding to the maximum time domain resource offset and the maximum frequency domain resource offset;

and taking the target time interval as the preset threshold value.

In one possible implementation manner, determining the current working scenario of the terminal device includes:

acquiring Radio Resource Control (RRC) signaling;

And determining the current working scene of the terminal equipment according to the RRC signaling.

In one possible implementation manner, after synchronizing the time domain resource and the frequency domain resource between the terminal device and the base station, the method further includes:

determining a signal power of the SSB signal;

acquiring expected power of a signal received by an analog-digital converter of the terminal equipment;

according to the signal power and the expected power, adjusting the Automatic Gain Control (AGC) of the terminal equipment to obtain an adjusted AGC;

based on the adjusted AGC, the paging occasion PO is received.

In a second aspect, the present application provides a synchronization apparatus for a terminal and a base station, including:

the first determining module is used for determining the dormancy type of the terminal equipment when the terminal equipment is detected to be awakened from the dormancy state, wherein the dormancy type is long-time dormancy or short-time dormancy;

the second determining module is used for determining the current working scene of the terminal equipment, wherein the working scene is a high-speed motion scene or a non-high-speed motion scene;

and the synchronization module is used for synchronizing the time domain resource and the frequency domain resource between the terminal equipment and the base station based on the dormancy type and the working scene.

In one possible implementation manner, the synchronization module is specifically configured to:

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

acquiring the dormancy time of the terminal equipment in the dormancy state;

In one possible implementation, the apparatus further includes: and a third determination module.

The third determining module is specifically configured to:

acquiring an SSB signal;

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

and taking the target time interval as the preset threshold value.

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

acquiring Radio Resource Control (RRC) signaling;

In one possible implementation, the apparatus further includes: and a receiving module.

The receiving module is specifically configured to: after synchronizing time domain resources and frequency domain resources between the terminal equipment and the base station, determining signal power of the SSB signal;

Based on the adjusted AGC, the paging occasion PO is received.

In a third aspect, the present application provides an electronic device comprising: a processor, and a memory communicatively coupled to the processor;

the memory stores computer-executable instructions;

the processor executes the computer-executable instructions stored in the memory to implement the method for synchronizing a terminal with a base station according to the first aspect.

In a fourth aspect, the present application provides a computer-readable storage medium having stored therein computer-executable instructions for implementing the method of synchronizing a terminal with a base station according to the first aspect when executed by a computer.

In a fifth aspect, the present application provides a computer program product comprising a computer program for implementing the method of synchronizing a terminal with a base station according to the first aspect when the computer program is executed by a computer.

In a sixth aspect, an embodiment of the present application provides a chip, where a computer program is stored on the chip, where the computer program when executed by the chip causes the synchronization method between the terminal and the base station in the first aspect to be executed.

In one possible embodiment, the chip is a chip in a chip module.

In a seventh aspect, an embodiment of the present application provides a module apparatus, where the module apparatus includes a power module, a storage module, and a chip module;

the power supply module is used for providing electric energy for the module equipment;

the storage module is used for storing data and instructions;

the chip module is used for executing the synchronization method of the terminal and the base station in the first aspect.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic diagram of a terminal device periodically listening to a paging channel in a DRX manner according to an example of the present application;

FIG. 2 is a schematic diagram of SSB structure in NR system;

fig. 3 is a flowchart of a method for synchronizing a terminal and a base station according to an embodiment of the present application;

fig. 4 is a flowchart of a method for synchronizing a terminal and a base station according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a synchronization device between a terminal and a base station according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) telecommunications system, 5G mobile telecommunications system, or new radio access technology (New Radio Access Technology, NR). The 5G mobile communication system may include a Non-independent Networking (NSA) 5G mobile communication system and/or an independent networking (SA) 5G mobile communication system.

The technical scheme provided by the embodiment of the application can be also applied to future communication systems, such as a sixth generation mobile communication system, a seventh generation mobile communication system and the like. The application is not limited in this regard.

The DRX is mainly used for saving power consumption of the terminal device, and in popular terms, power is saved, so that standby time of the terminal device is longer.

The early DRX is only suitable for idle mode, and the DRX mode is adopted to periodically monitor the paging channel, so the purpose of saving the energy of the terminal equipment can be achieved by adopting the DRX mode because the paging channel is decoded to consume the battery power. Fig. 1 is a schematic diagram illustrating a terminal device periodically listening to a paging channel using a DRX mode.

In a 5G mobile communication system, understanding of DRX can be classified into Idle/active (active) DRX, which is implemented by listening to a paging channel because there is no radio resource control (Radio Resource Control, RRC) connection and a terminal device dedicated bearer, and Connected (Connected) DRX, which is implemented by listening to a physical downlink control channel (Physical Downlink Control Channel, PDCCH) which is a DRX characteristic when the terminal device is in an RRC Connected state.

Whether in idle state or connected state, if there is no DRX mechanism, the terminal device will monitor the downlink PDCCH subframe all the time to see whether there is information from the serving cell, however, in reality, the terminal device is not always interacting with the base station for effective information, and will not always perform uploading or downloading services, for example, there will not always be voice data transmission during a call. Most of the time, there is no data interaction between the terminal device and the base station, and if the terminal device is still listening to PDCCH subframes continuously during idle time, it is obviously very power consuming. Therefore, DRX is a mechanism for saving power of a terminal device, which is necessary to design on the premise of ensuring that data can be effectively transmitted. The RRC configures DRX-related parameters configured by a certain terminal device through DRX-config. That is, the DRX may control the terminal device to periodically enter a Sleep state (Sleep Mode) at some time, not monitor the PDCCH subframe, but Wake up (Wake up) from the Sleep state when monitoring is needed, so that the terminal device can achieve the purpose of saving power.

In the NR system, the current access procedure may be to first blindly check the SSB on the synchronization grid, and after detecting the SSB, obtain the configuration information of the control resource set and the search space of the scheduling system information by reading the PBCH in the SSB. And then, the PDCCH of the system information is scheduled according to the configuration information in a blind way, after the blind way is successful, the system information carried in a physical downlink shared channel (Physical Downlink Share Channel, PDSCH) scheduled by the PDCCH is read to acquire the cell information, and then, the random access is carried out according to the cell information to complete synchronization and link establishment.

After the link is established, the terminal equipment needs to periodically sleep to save electricity, after the terminal equipment is in sleep for a long time, the terminal equipment and the base station can lose synchronization under the influence of the environment change (such as relative motion and clock instability) of the communication link, namely, the problems of time offset and/or frequency offset and the like are generated, so that the information interaction between the terminal equipment and the base station is influenced. Therefore, after the terminal device wakes up after sleep, synchronization needs to be recovered through the synchronization signal, the corresponding synchronization signal in the NR system is SSB, and in the connection state, the synchronization signal may also be a tracking reference signal (Tracking Reference Signal, TRS).

In general, in order to save power consumption, a terminal device typically shuts down some hardware devices, reduces an operating voltage, and even uses a different clock when in sleep, such as a 26Mhz clock when in normal operation, a 32Khz clock when in sleep, and resumes a clock (i.e., 26 Mhz) when in sleep and wakes up.

To solve the problem caused by the wake-up after the sleep of the terminal device, the conventional scheme is generally based on a synchronization signal block (Synchronization Signal Block, SSB), specifically, similar to the cell search, by performing initial synchronization of time domain resources and frequency domain resources and automatic gain control (Automatic Gain Control, AGC) alignment through a primary synchronization signal (Primary Synchronization Signals, PSS) and a secondary synchronization signal (Secondary Synchronization Signal, SSS) in the SSB, then performing final synchronization of the time domain resources and the frequency domain resources based on the initial synchronization result and a physical broadcast channel (Physical Broadcast Channel, PBCH) in the SSB, and then performing reception of a subsequent Paging Occasion (PO). However, this method is not careful enough, and does not consider the actual situation of the terminal device, such as the sleep time period or whether the terminal device is in a high-speed motion state, so that unnecessary power consumption is wasted when the terminal device is synchronized.

For example, fig. 2 is a schematic diagram of an SSB structure in an NR system, where SSB components as a whole are simultaneously transmitted on 4 orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols, and SSB occupies a total of 4 OFDM symbols in the time domain and occupies a total of 240 subcarriers in the frequency domain.

However, when the terminal device wakes up from the sleep state, the frequency domain resource may be offset due to the following aspects: the historical loop tracks residual values, crystals are unstable, and the terminal equipment is in a high-speed scene. The time domain resource offset may be caused by a system clock error.

The frequency domain resource offset caused by the historical loop tracking residual value and the crystal instability is smaller and can not be considered. And the frequency domain resource offset caused by the high-speed scene is larger.

Moreover, the sleep time of the terminal device is also an important factor for causing the time domain resource and the frequency domain resource to deviate.

Therefore, the application provides a synchronization method of the terminal and the base station, and simultaneously considers the sleeping time length and the working scene of the terminal equipment, and based on the sleeping time length and the working scene, the time domain resources and the frequency domain resources between the terminal equipment and the base station are more finely synchronized by using different modes, so that the synchronization is realized under the condition of lower power consumption.

The synchronization of the time domain resources refers to that the starting point of a time slot for receiving information by the terminal equipment is consistent with the time slot for transmitting information by the base station.

The synchronization of the frequency domain resource means that the oscillation frequency of the local crystal oscillator of the terminal equipment is kept consistent with the base station, so as to ensure that the carrier frequency sent by the terminal equipment is consistent with the configuration of the base station cell.

In the embodiment of the application, the base station can be any device with a wireless receiving and transmitting function. The apparatus includes, but is not limited to: an Evolved Node B (eNB), a radio network controller (Radio Network Controller, RNC), a Node B (Node B, NB), a base station controller (Base Station Controller, BSC), a base transceiver station (Base Transceiver Station, BTS), a Home base station (Home Evolved NodeB, or a Home Node B, HNB, for example), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (Wireless Fidelity, wiFi) system, a wireless relay Node, a wireless backhaul Node, a transmission Point (Transmission Point, TP), or a transmission reception Point (Transmission and Reception Point, TRP), etc., may also be 5G, such as NR, a next generation base station (The Next Generation Node B, gNB) in the system, or a transmission Point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in the 5G system, or may also be a network Node constituting the gNB or the transmission Point, such as a Baseband Unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include an active antenna unit (Active Antenna Unit, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB. For example, the CU is responsible for handling non-real time protocols and services, implementing the functions of the RRC, packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer. The DUs are responsible for handling Physical layer protocols and real-time services, implementing the functions of the radio link control (Radio Link Control, RLC), data link (Medium Access Control, MAC) and Physical (PHY) layers. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. A CU may be considered a Network device in an access Network (Radio Access Network, RAN) or a Network device in a Core Network (CN), and the present application is not limited thereto.

The network device provides services for the Cell, and the terminal device communicates with the Cell through transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network device, where the Cell may belong to a macro base station (for example, macro eNB or macro gNB, etc.), or may belong to a base station corresponding to a Small Cell (Small Cell), where the Small Cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

In the embodiment of the present application, the terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, some examples of terminals may be: a Mobile Phone (Mobile Phone), a tablet (Pad), a computer with wireless transceiving function (such as a notebook computer, a palm computer, etc.), a Mobile internet device (Mobile Internet Device, MID), a Virtual Reality (VR) device, an augmented Reality (Augmented Reality, AR) device, an augmented Reality (XR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (Self Driving), a wireless terminal in Remote Medical (Remote Medical), a wireless terminal in Smart Grid (Smart Grid), a wireless terminal in transportation security (Transportation Safety), a wireless terminal in Smart City (Smart City), a wireless terminal in Smart Home (Smart Home), a cellular Phone, a cordless Phone, a session initiation protocol (Session Initiation Protocol, SIP) Phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication function, a computing device or a wireless terminal connected to a wireless modem, an evolution (PLMN) device, a Mobile terminal in future Mobile terminal (35G) or the like, a Mobile terminal in the future, a Mobile communication device, a Mobile terminal in the future (PLMN) or the like.

Furthermore, the terminal device may also be a terminal device in an IoT system. IoT is an important component of future information technology development, and its main technical feature is to connect an item with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for object interconnection. IoT technology may enable massive connectivity, deep coverage, and power saving through, for example, narrowband (NB) technology.

The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following specific embodiments may exist alone or in combination with one another, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 3 is a flow chart of a method for synchronizing a terminal and a base station according to an embodiment of the present application, where the method may be performed by a terminal device, or may be performed by a device for synchronizing a terminal and a base station, which is provided in a terminal device, and the device may be a chip, or may be a chip module, or may be an integrated development environment (integrated development environment, IDE), etc., and referring to fig. 3, the method includes the following steps:

S301, when the terminal equipment is detected to be awakened from the dormant state, determining the dormant type of the terminal equipment, wherein the dormant type is long-time dormant or short-time dormant.

When the terminal device is detected to wake up from the sleep state, the sleep type of the terminal device may be determined, wherein the sleep type is long-time sleep or short-time sleep.

The terminal device wakes up by way of example may be: the terminal device receives the wake-up signal, and then the terminal device switches the sleep state to the working state.

S302, determining a current working scene of the terminal equipment, wherein the working scene is a high-speed motion scene or a non-high-speed motion scene.

When the terminal equipment wakes up from the dormant state, the current working scene of the terminal equipment can be determined, wherein the working scene is a high-speed motion scene or a non-high-speed motion scene.

For example, the high-speed motion scenario may be that the terminal device is in a high-speed rail mode, and the terminal device may determine whether the terminal device is in the high-speed rail mode according to RRC signaling.

By way of example, the non-operational scenario may be the terminal device being in a low speed state of motion, e.g., the terminal device being in a stationary state, or the terminal device being in a low speed state of motion with a user walking at a low speed, a vehicle traveling, etc.

S303, synchronizing time domain resources and frequency domain resources between the terminal equipment and the base station based on the dormancy type and the working scene.

After determining the dormancy type and the working scene of the terminal equipment, the terminal equipment can synchronize time domain resources and frequency domain resources between the terminal equipment and the base station based on the dormancy type and the working scene.

For example, the terminal device may divide the sleep type and the operation scenario into the following cases:

case 1: the sleep type is short-time sleep and the work scene is a non-high-speed motion scene.

Case 2: the sleep type is long-time sleep, and the work scene is a non-high-speed motion scene.

Case 3: the sleep type is short-time sleep, and the work scene is a high-speed motion scene.

Case 4: the sleep type is long-time sleep, and the work scene is a non-high-speed motion scene.

For the four cases, each case can correspond to different synchronization modes, and the terminal equipment performs synchronization of time domain resources and frequency domain resources between the terminal equipment and the base station according to the synchronization modes corresponding to the different cases, so that the synchronization work of the terminal equipment is finer.

For example, for the synchronization mode corresponding to the case 1, because the influence of the time domain resource offset and the frequency domain resource offset generated by the terminal device corresponding to the non-high-speed motion scene and the short-time dormancy is relatively small, the synchronization of the time domain resource and the frequency domain resource can be performed according to the PBCH, and the synchronization of the time domain resource and the frequency domain resource between the terminal device and the base station can be solved.

In this embodiment, when it is detected that the terminal device wakes up from the sleep state, the sleep type of the terminal device may be determined, where the sleep type is long-time sleep or short-time sleep, then a current working scenario of the terminal device is determined, where the working scenario is a high-speed motion scenario or a non-high-speed motion scenario, and based on the sleep type and the working scenario of the terminal device, time domain resources and frequency domain resources between the terminal device and the base station are synchronized. The application can realize the synchronization of the time domain resource and the frequency domain resource between the terminal equipment and the base station more finely based on the working scene and the sleeping time length of the terminal equipment so as to realize the synchronization under the condition of lower power consumption.

Next, another method for synchronizing a terminal and a base station according to the present application will be described by way of another embodiment.

Fig. 4 is a flow chart of a method for synchronizing a terminal and a base station according to an embodiment of the present application, where the method may be performed by a terminal device, or may be performed by a device for synchronizing a terminal and a base station, which is provided in a terminal device, and the device may be a chip, or may be a chip module, or may be an IDE, etc., and referring to fig. 4, the method includes the following steps:

S401, when the terminal equipment is detected to be awakened from the dormant state, determining the dormant type of the terminal equipment, wherein the dormant type is long-time dormant or short-time dormant.

In one possible implementation, when detecting that the terminal device wakes up from the sleep state, the terminal device may determine the sleep type of the terminal device by:

the sleep time of the terminal device in the sleep state can be obtained, and specifically, the terminal device can determine the sleep time according to the time of entering the sleep time and the time of waking up from the sleep state.

And comparing the sleep time length with a preset threshold value, and determining that the sleep type of the terminal equipment is long-time sleep if the sleep time length is greater than or equal to the preset threshold value. If the sleep duration is less than the preset threshold, the sleep type of the terminal equipment can be determined to be short-time sleep.

The preset threshold may be determined according to signal demodulation performance of the terminal device.

In one possible implementation manner, the terminal device may determine the preset threshold value by:

the terminal equipment can acquire SSB signals, then synchronously demodulate the SSB signals, and decode to obtain a main information block (Master Information Block, MIB), wherein the MIB carries control resource sets of scheduling system information and configuration information of a search space, and then performs blind detection on the PDCCH according to the information carried in the MIB to obtain a blind detection result, and the blind detection result can comprise cell information acquired by system information carried in the PDSCH scheduled by the PDCCH.

And then determining the maximum time domain resource offset and the maximum frequency domain resource offset which can be born by the terminal equipment according to the blind detection result. And determining a preset threshold according to the maximum time domain resource offset and the maximum frequency domain resource offset. It can be understood that the demodulation performance of the terminal device is not affected by the maximum time domain resource offset and the maximum frequency domain resource offset of the terminal device.

In one possible implementation manner, the terminal device may obtain a correspondence relationship, where the correspondence relationship includes a plurality of time intervals, and a time domain resource offset and a frequency domain resource offset corresponding to each time interval, and then may determine, in the correspondence relationship, a target time interval corresponding to a maximum time domain resource offset and a maximum frequency domain resource offset, and use the target time interval as a preset threshold.

Illustratively, since the time domain resource offset occurs in the terminal device due to a system clock error, for example, in a DRX scenario, caused by a crystal switch (e.g., a high voltage and low voltage switch, or an ambient temperature change), the time domain resource offset corresponding to each time interval may be determined by:

the frequency error caused by the crystal switching at each time interval, which may be expressed in ppm, 1ppm representing one part per million, typically referred to as one part per million of the frequency error, is determined, and then the time domain resource bias corresponding to each time interval may be determined by equation (1).

ΔT＝T×Δ _ppm ×f _s (1)

Wherein DeltaT is time domain resource deviation, deltaT _ppm For frequency error caused by crystal switching, f _s Is the sampling rate.

For example, table 1 shows the sampling rate f _s The time domain resource offset and the frequency error caused by the crystal switching corresponding to each time interval are 30.72Mhz (megahertz).

List one

Time interval (unit: second)	ppm	Time domain resource offset
			0.32	1.5	14.7
0.64	1.5	29.4
			1.28	1.5	59
2.56	1.5	118
			0.32	5	49.1
0.64	5	98.3
			1.28	5	196.6
2.56	5	393

For example, since the factors including the occurrence of the frequency domain resource offset of the terminal device include that the terminal device is in a high speed scenario, the frequency domain resource offset corresponding to each time interval may be determined by equation (2).

Wherein Δf doppler frequency offset, i.e. frequency domain resource offset, v is the movement speed of the terminal equipment, e.g. the movement speed of the terminal equipment is the running speed of the high-speed rail if the terminal equipment is on the high-speed rail, c is the speed of light, and the value is generally 3×10 ⁵ km/s (kilometers per second), also denoted 3X 10 ⁸ m/s (meters per second), f _c For the frequency band of NR systems, e.g. the primary frequency used for 5GThe section is 3.4 GHz-3.5 GHz (gigahertz).

For example, the movement speed of the terminal equipment is 500km/h (kilometers per hour), f _c At 5Ghz, the maximum doppler frequency offset produced is 4.63 Khz.

S402, determining a current working scene of the terminal equipment, wherein the working scene is a high-speed motion scene or a non-high-speed motion scene.

In one possible implementation, the terminal device may acquire RRC signaling and then determine the current operating scenario of the terminal device according to the RRC.

S403, determining a synchronous mode according to the dormancy type and the working scene.

After determining the dormancy type and the working scene of the terminal device, the terminal device may determine the synchronization mode according to the dormancy type and the working scene.

Specifically, the following cases can be classified:

case 1

If the dormancy type is short-time dormancy and the working scene is a non-high-speed motion scene, determining that the synchronization mode is: and synchronizing the time domain resource and the frequency domain resource according to the PBCH in the SSB signal.

Specifically, for the synchronization mode in this case, the terminal device may determine the position of the demodulation reference signal (Demodulation Reference Signal, DMRS), where the position of the DMRS in the time domain is the same as that of the PBCH, and 4 subcarriers are spaced in the frequency domain, so as to determine the time-frequency resource position of the PBCH, thereby implementing synchronization of the time-domain resource and the frequency-domain resource between the terminal device and the base station.

Case 2

If the dormancy type is long-time dormancy and the working scene is a high-speed motion scene, determining that the synchronization mode is: and performing first synchronization of time domain resources according to the PSS and the SSS in the SSB signal, and performing second synchronization of the time domain resources and the frequency domain resources based on the result of the first synchronization and the PBCH.

In particular, for this synchronization manner, the terminal device may search the PSS and SSS to achieve coarse synchronization of the time domain resources (i.e., the first synchronization), but since the position of the PSS or SSS in the time domain (on which character the specific SSB is distributed) is inaccurate, the terminal device does not complete synchronization of the time domain resources.

On the basis of the first synchronization structure, that is, after the PSS and the SSS are successfully searched, the terminal device may decode the PBCH according to the Identifier (Identifier) of the current residence cell, so as to determine the position of the DMRS, where the position of the DMRS in the time domain is the same as the PBCH, and 4 subcarriers are spaced in the frequency domain, so as to determine the time domain resource position and the frequency domain resource position of the PBCH, thereby implementing synchronization of the time domain resource and the frequency domain resource between the terminal device and the base station.

Case 3

If the dormancy type is short-time dormancy and the working scene is a high-speed motion scene, determining that the synchronization mode is: and performing first synchronization of frequency domain resources according to the PSS and the SSS in the SSB signal, and performing second synchronization of time domain resources and frequency domain resources based on the result of the first synchronization and the PBCH.

Specifically, for the synchronization manner in this case, the terminal device may search the PSS and the SSS to achieve coarse synchronization of the frequency domain resources (i.e., first synchronization), but since the position of the PSS or the SSS on the frequency domain (the starting RB, the RB is 12 subcarriers in succession in frequency, and one slot in the time domain) is inaccurate, the terminal device does not complete synchronization of the frequency domain resources.

Based on the first synchronization structure, i.e. after the PSS and SSS are successfully searched, the terminal device may determine the DMRS position according to the identifier of the current residence cell, where the DMRS position in the time domain is the same as the PBCH, and the frequency domain is separated by 4 subcarriers, so as to determine the time domain resource position and the frequency domain resource position of the PBCH, thereby implementing synchronization of the time domain resource and the frequency domain resource between the terminal device and the base station.

Case 4

If the dormancy type is long-time dormancy and the working scene is a non-high-speed motion scene, determining that the synchronization mode is: and performing first synchronization of time domain resources and frequency domain resources according to the PSS and the SSS in the SSB signal, and performing second synchronization of the time domain resources and the frequency domain resources based on the result of the first synchronization and the PBCH.

Specifically, for the synchronization manner in this case, the terminal device may search the PSS and the SSS to achieve coarse synchronization of the time domain resource and the frequency domain resource (i.e., first synchronization), but since the position of the PSS or the SSS in the frequency domain (the starting RB, the RB is 12 subcarriers in succession in frequency, one slot in the time domain) and the position in the time domain (on which character the specific SSB is distributed) are inaccurate, the terminal device does not complete synchronization of the time domain resource and the frequency domain resource.

It will be appreciated that the first synchronization is a coarse synchronization and the second synchronization is a fine synchronization, the accuracy of the first synchronization being less than the accuracy of the second synchronization.

It should be noted that, for the description of the synchronization on the time domain resource and the frequency domain resource in the above synchronization manner, reference may be made to the related flow of cell search of the NR system in the related art, which is not described herein, but the synchronization manner of the present application is not limited to the related flow of cell search of the NR system in the related art.

S404, synchronizing the time domain resource and the frequency domain resource between the terminal equipment and the base station according to the synchronization mode.

After determining the synchronization mode, the terminal device can synchronize the time domain resource and the frequency domain resource between the terminal device and the base station according to the synchronization mode.

In one possible implementation, after synchronizing the time domain resources and the frequency domain resources between the terminal device and the base station, the terminal device may adjust the AGC so that the analog-to-digital converter of the terminal device operates in a suitable range.

Specifically, the terminal device may determine the signal power of the SSB signal, obtain the desired power of the signal received by the analog-digital converter of the terminal device, adjust the AGC of the terminal device according to the signal power and the desired power, obtain the adjusted AGC, and receive the subsequent PO based on the adjusted AGC.

For example, the signal power may be compared to the desired power, the AGC may be decreased by a preset ratio when the signal power is greater than the desired power, and the AGC may be increased by a preset ratio when the signal power is less than the desired power.

In this embodiment, when it is detected that the terminal device wakes up from the sleep state, the sleep type of the terminal device may be determined, where the sleep type is long-time sleep or short-time sleep, then a current working scenario of the terminal device is determined, the working scenario is a high-speed motion scenario or a non-high-speed motion scenario, a synchronization mode is determined according to the sleep type and the working scenario, and then time domain resources and frequency domain resources between the terminal device and the base station are synchronized according to the synchronization mode. The application can realize the synchronization of the time domain resource and the frequency domain resource between the terminal equipment and the base station more finely based on the working scene and the sleeping time length of the terminal equipment so as to realize the synchronization under the condition of lower power consumption.

Fig. 5 is a schematic structural diagram of a synchronization device between a terminal and a base station according to an embodiment of the present application. Referring to fig. 5, the apparatus 50 includes: a first determination module 501, a second determination module 502, and a synchronization module 503.

The first determining module 501 is configured to determine, when detecting that the terminal device wakes up from a sleep state, a sleep type of the terminal device, where the sleep type is long-time sleep or short-time sleep.

The second determining module 502 is configured to determine a current working scenario of the terminal device, where the working scenario is a high-speed motion scenario or a non-high-speed motion scenario.

And the synchronization module 503 is configured to synchronize time domain resources and frequency domain resources between the terminal device and the base station based on the dormancy type and the working scenario.

In one possible implementation, the synchronization module 503 is specifically configured to:

and determining a synchronous mode according to the dormancy type and the working scene.

if the dormancy type is short-time dormancy and the working scene is a non-high-speed motion scene, determining that the synchronization mode is: and synchronizing time domain resources and frequency domain resources according to a physical broadcast channel PBCH in the synchronous signal block SSB signal.

If the dormancy type is long-time dormancy and the working scene is a high-speed motion scene, determining that the synchronization mode is: and performing first synchronization of time domain resources according to the primary synchronization signal PSS and the secondary synchronization signal SSS in the SSB signal, and performing second synchronization of the time domain resources and the frequency domain resources based on the result of the first synchronization and the PBCH.

In one possible implementation, the first determining module 501 is specifically configured to:

and acquiring the sleep time of the terminal equipment in the sleep state.

If the dormancy time length is greater than the preset threshold value, determining that the dormancy type of the terminal equipment is long-time dormancy.

And if the dormancy duration is smaller than or equal to a preset threshold value, determining that the dormancy type of the terminal equipment is short-time dormancy.

The third determining module is specifically configured to:

the SSB signal is acquired.

And synchronous demodulation is carried out through the SSB signals, and blind detection is carried out on the physical downlink control channel PDCCH, so that a blind detection result is obtained.

And determining the maximum time domain resource offset and the maximum frequency domain resource offset which can be born by the terminal equipment according to the blind detection result.

And determining a preset threshold according to the maximum time domain resource offset and the maximum frequency domain resource offset.

and obtaining a corresponding relation, wherein the corresponding relation comprises a plurality of time intervals, and a time domain resource offset and a frequency domain resource offset corresponding to each time interval.

And in the corresponding relation, determining a target time interval corresponding to the maximum time domain resource offset and the maximum frequency domain resource offset.

And taking the target time interval as a preset threshold value.

In one possible implementation, the second determining module 502 is specifically configured to:

and acquiring the Radio Resource Control (RRC) signaling.

The receiving module is specifically used for: after synchronizing the time domain resource and the frequency domain resource between the terminal equipment and the base station, determining the signal power of the SSB signal.

The desired power of the signal received by the analog-to-digital converter of the terminal device is obtained.

And adjusting the Automatic Gain Control (AGC) of the terminal equipment according to the signal power and the expected power to obtain the adjusted AGC.

Based on the adjusted AGC, the paging occasion PO is received.

The device of the present embodiment may be used to execute the technical solutions of the foregoing method embodiments, and the specific implementation manner and the technical effects are similar, and are not repeated herein.

Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application, and as shown in fig. 6, an electronic device 60 may include: at least one processor 601 and a memory 602.

A memory 602 for storing programs. In particular, the program may include program code including computer-executable instructions.

The Memory 602 may include random access Memory (Random Access Memory, RAM) and may also include Non-volatile Memory (Non-volatile Memory), such as at least one disk Memory.

The processor 601 is configured to execute computer-executable instructions stored in the memory 602 to implement the methods described in the foregoing method embodiments. The processor 601 may be a central processing unit (Central Processing Unit, CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits configured to implement embodiments of the present application.

Optionally, the electronic device 60 may further include: a communication interface 603. In a specific implementation, if the communication interface 603, the memory 602, and the processor 601 are implemented independently, the communication interface 603, the memory 602, and the processor 601 may be connected to each other through buses and perform communication with each other. The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. Buses may be divided into address buses, data buses, control buses, etc., but do not represent only one bus or one type of bus.

Alternatively, in a specific implementation, if the communication interface 603, the memory 602, and the processor 601 are integrated on a chip, the communication interface 603, the memory 602, and the processor 601 may complete communication through internal interfaces.

The electronic device 60 may be a chip, a chip module, an IDE, a terminal device, or the like.

The electronic device of the present embodiment may be used to execute the technical solutions of the foregoing method embodiments, and the specific implementation manner and the technical effects are similar, and are not repeated herein.

Embodiments of the present application provide a computer-readable storage medium, which may include: various media capable of storing computer execution instructions, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a RAM, a magnetic disk, or an optical disc, etc., specifically, the computer execution instructions are stored in the computer readable storage medium, and when the computer execution instructions are executed by a computer, the technical scheme shown in the foregoing method embodiment is executed, and specific implementation manner and technical effects are similar and are not repeated herein.

The embodiment of the application provides a computer program product, which comprises a computer program, when the computer program is executed by a computer, the technical scheme shown in the embodiment of the method is executed, and the specific implementation manner and the technical effect are similar, and are not repeated here.

The embodiment of the application provides a chip, wherein a computer program is stored on the chip, and when the computer program is executed by the chip, the technical scheme shown in the embodiment of the method is executed.

In one possible implementation, the chip may also be a chip module.

The chip of this embodiment may be used to execute the technical solutions shown in the foregoing method embodiments, and the specific implementation manner and the technical effects are similar, and are not repeated here

The embodiment of the application provides a module device which comprises a power supply module, a storage module and a chip module.

The power supply module is used for providing electric energy for the module equipment.

The storage module is used for storing data and instructions.

The chip module of the embodiment may be used to execute the technical solution shown in the foregoing method embodiment, and the specific implementation manner and the technical effect are similar, and are not repeated here.

Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

In the present application, "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" indicates that the front and rear associated objects are an "or" relationship.

"at least one (item) below" or the like, refers to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein each of a, b, c may itself be an element, or may be a collection comprising one or more elements.

The term "at least one" in the present application means one or more. "plurality" means two or more. The first, second, etc. descriptions in the embodiments of the present application are only used for illustrating and distinguishing the description objects, and no order is used, nor is the number of the devices in the embodiments of the present application limited, and no limitation on the embodiments of the present application should be construed. For example, the first threshold and the second threshold are merely for distinguishing between different thresholds, and are not intended to represent differences in the size, priority, importance, or the like of the two thresholds.

In the present disclosure, "exemplary," "in some embodiments," "in other embodiments," etc. are used to indicate an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.

"of", "corresponding", and "associated" in the present application may be sometimes used in combination, and it should be noted that the meaning of the expression is consistent when the distinction is not emphasized. Communication, transmission, etc. may sometimes be mixed in embodiments of the present application, it should be noted that the meaning expressed is consistent with the de-emphasis. For example, a transmission may include sending and/or receiving, either nouns or verbs.

In the application, "equal to" can be used in conjunction with "less than" or "greater than" but not in conjunction with "less than" and "greater than" at the same time. When the combination of the 'equal' and the 'less' is adopted, the method is applicable to the technical scheme adopted by the 'less'. When being used with 'equal to' and 'greater than', the method is applicable to the technical scheme adopted by 'greater than'.

Claims

1. A method for synchronizing a terminal with a base station, the method comprising:

2. The method of claim 1, wherein synchronizing time domain resources and frequency domain resources between the terminal device and a base station based on the sleep type and the operating scenario comprises:

3. The method of claim 2, wherein determining a synchronization pattern based on the sleep type and the operational scenario comprises:

4. A method according to any of claims 1-3, characterized in that determining the sleep type of the terminal device comprises:

acquiring the dormancy time of the terminal equipment in the dormancy state;

5. The method according to claim 4, wherein the method further comprises:

acquiring an SSB signal;

6. The method of claim 5, wherein determining the preset threshold based on the maximum time domain resource offset and the maximum frequency domain resource offset comprises:

and taking the target time interval as the preset threshold value.

7. The method according to any of claims 1-6, wherein determining the current operating scenario of the terminal device comprises:

acquiring Radio Resource Control (RRC) signaling;

8. The method of claim 7, wherein after synchronizing the time domain resources and the frequency domain resources between the terminal device and the base station, the method further comprises:

determining a signal power of the SSB signal;

based on the adjusted AGC, the paging occasion PO is received.

9. A synchronization apparatus for a terminal and a base station, comprising:

10. An electronic device, comprising: a processor, and a memory communicatively coupled to the processor;

the memory stores computer-executable instructions;

the processor executes computer-executable instructions stored in the memory to implement the method of synchronizing a terminal with a base station according to any of claims 1-8.

11. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein computer executable instructions, which when executed by a processor are adapted to implement the synchronization method of a terminal and a base station according to any of claims 1-8.

12. A computer program product comprising a computer program which, when executed by a processor, implements the method of synchronizing a terminal with a base station according to any of claims 1-8.