System information acquisition method, apparatus, terminal and network side device

Abstract

The present application belongs to the technical field of communications. Disclosed are a system information acquisition method, an apparatus, a terminal and a network side device. The system information acquisition method in the embodiments of the present application comprises: a terminal determining a target cell, the target cell being a cell among neighboring cells of the current serving cell of the terminal satisfying a first condition; the terminal measuring a synchronization signal block (SSB) of the target cell to acquire a downlink synchronization timing corresponding to the target cell; on the basis of the downlink synchronization timing, the terminal sending a wake-up signal (WUS) to the target cell; and, on the basis of a first response message sent by the target cell, the terminal receiving a system information block (SIB).

Description

Methods, devices, terminals, and network-side equipment for acquiring system information

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411994523.2, filed in China on December 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of communication technology, and specifically relates to a method, apparatus, terminal and network-side equipment for acquiring system information. Background Technology

[0004] In the method for an idle-state User Equipment (UE) to obtain the first System Information Block 1 (SIB1) of a target cell, the UE needs to send a Physical Random Access Channel (PRACH) preamble to the target cell before obtaining the corresponding first system information of the target cell. Only after receiving a Random Access Response (RAR) does the UE determine that the target cell has started sending SIB1. After receiving SIB1 and the necessary SIBs, the UE performs idle-state camping in the target cell. This type of technology is called on-demand SIB1 (OD-SIB1) technology.

[0005] Before transmitting the random access sequence, the UE needs to determine the timing reference cell for transmitting the random access sequence. During the process of determining the timing reference cell, the UE can obtain the corresponding timing based on measurements of the cell in the idle state. In related technologies, after the UE transmits the random access sequence, regardless of whether the network responds normally, the UE executes according to the assumption of entering the connected state. Therefore, the UE's measurement results of the cell in the idle state directly affect the synchronization accuracy of the random access process. Errors in the measurement results in the idle state can cause a decrease in the synchronization accuracy performance of Random Access Channel (RACH) transmission and RAR reception, thus resulting in a loss of transmit and receive performance. Summary of the Invention

[0006] This application provides a method, apparatus, terminal, and network-side device for acquiring system information, which can solve the problem of reduced synchronization accuracy during random access, leading to loss of transmission and reception performance.

[0007] Firstly, a method for acquiring system information is provided, executed by a terminal, the method comprising:

[0008] The terminal determines a target cell, which is a cell among the neighboring cells of the terminal's currently serving cell that meets a first condition;

[0009] The terminal measures the Synchronization Signal Block (SSB) of the target cell to obtain the downlink synchronization timing corresponding to the target cell;

[0010] The terminal sends a wake-up signal (WUS) to the target cell based on the downlink synchronization timing.

[0011] The terminal receives a System Information Block (SIB) based on the first response message sent by the target cell.

[0012] Secondly, a method for sending system information is provided, executed by a network-side device, the method comprising:

[0013] The network-side device receives the WUS sent by the terminal, and the configuration information of the WUS is configured by the terminal's current serving cell;

[0014] The network-side device sends a first response message to the terminal;

[0015] The network-side device sends an SIB to the terminal.

[0016] Thirdly, a system information acquisition device is provided, comprising:

[0017] The first processing module is used to determine the target cell, which is a cell among the neighboring cells of the terminal's current serving cell that meets the first condition;

[0018] The second processing module is used to measure the synchronization signal block (SSB) of the target cell and obtain the downlink synchronization timing corresponding to the target cell.

[0019] The first transmitting module is used to send a wake-up signal WUS to the target cell based on the downlink synchronization timing.

[0020] The first receiving module is used to receive a System Information Block (SIB) based on a first response message sent by the target cell.

[0021] Fourthly, a system information transmitting device is provided, comprising:

[0022] The sixth receiving module is used to receive WUS sent by the terminal, wherein the configuration information of the WUS is configured by the terminal's current serving cell;

[0023] The third sending module is used to send a first response message to the terminal;

[0024] The fourth sending module is used to send SIBs to the terminal.

[0025] Fifthly, a system information acquisition apparatus is provided, the apparatus being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0026] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0027] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to: determine a target cell, the target cell being a cell among the neighboring cells of the terminal's current serving cell that meets a first condition; measure the synchronization signal block (SSB) of the target cell to obtain the downlink synchronization timing corresponding to the target cell;

[0028] The communication interface is used for: sending a wake-up signal (WUS) to the target cell based on the downlink synchronization timing; and receiving a system information block (SIB) according to the first response message sent by the target cell.

[0029] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0030] In a ninth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is used to: receive a WUS sent by a terminal, wherein the configuration information of the WUS is configured by the current serving cell of the terminal; send a first response message to the terminal; and send an SIB to the terminal.

[0031] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0032] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0033] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0034] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and executed by at least one processor to implement the steps of the system information acquisition method as described in the first aspect, or the steps of the system information transmission method as described in the second aspect.

[0035] In this embodiment, the terminal determines the target cell from the neighboring cells of the current serving cell. Before initiating random access to the target cell, it measures the SSB of the target cell to determine the downlink synchronization timing corresponding to the target cell. Based on the downlink synchronization timing, it sends a WUS to the target cell and then receives system information sent by the target cell. By obtaining the downlink synchronization timing of the target cell, the synchronization accuracy of sending the WUS to the target cell and receiving the response message from the target cell can be guaranteed to be higher, avoiding performance loss in the information transmission and reception process. Attached Figure Description

[0036] Figure 1 is a block diagram of a wireless communication system;

[0037] Figure 2 is a flowchart illustrating the method for obtaining system information according to an embodiment of this application;

[0038] Figure 3 is one of the schematic diagrams of the idle state behavior of the UE in the reselection state according to an embodiment of this application;

[0039] Figure 4 is a second schematic diagram of the idle state behavior of the UE in the reselection state according to an embodiment of this application;

[0040] Figure 5 is a flowchart illustrating the system information transmission method according to an embodiment of this application;

[0041] Figure 6 is a schematic diagram of the system information acquisition device according to an embodiment of this application;

[0042] Figure 7 is a schematic diagram of the structure of the system information sending device according to an embodiment of this application;

[0043] Figure 8 is a schematic diagram of the structure of a communication device according to an embodiment of this application;

[0044] Figure 9 is a schematic diagram of the structure of the terminal according to an embodiment of this application;

[0045] Figure 10 is a schematic diagram of the network-side device according to an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0047] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as the sender explicitly informing the receiver of specific information, the required operation, or the requested result in the instruction sent. An indirect instruction can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the required operation or requested result based on the judgment result.

[0049] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0050] Figure 1 shows a block diagram of a wireless communication system applicable to an embodiment of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as User Equipment (UE), and can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (APs), or Wireless Fidelity (WiFi) nodes, etc.Among them, base stations can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), and Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform). The term "base station" can be any suitable term in the field, such as "station" or any other appropriate term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. It should be noted that the embodiments of this application only use the base station in the NR system as an example for introduction, and do not limit the specific type of base station.

[0051] The method for obtaining system information provided in this application will be described in detail below with reference to the accompanying drawings, through some embodiments and application scenarios.

[0052] As shown in Figure 2, this application embodiment provides a method for obtaining system information, including:

[0053] Step 201: The terminal determines the target cell, which is a cell among the neighboring cells of the terminal's current serving cell that meets the first condition;

[0054] In this embodiment, when the terminal is camped on the current serving cell, it can measure the neighboring cells of the current serving cell and determine that the neighboring cell that meets the first condition is the target cell.

[0055] Optionally, the terminal can perform measurements on both the current serving cell and neighboring cells. Measurements of neighboring cells may include measurements of inter-frequency neighboring cells and / or co-frequency neighboring cells. These measurements may include cell discovery and cell measurement, where the cell sends, for example, a Primary Synchronization Signal (PSS) / Secondary Synchronization Signal (SSS) detection.

[0056] Step 202: The terminal measures the Synchronization Signal Block (SSB) of the target cell to obtain the downlink synchronization timing corresponding to the target cell;

[0057] After determining the target cell, the terminal measures the SSB of the target cell. Optionally, measuring the SSB of the target cell may include performing SSB measurement according to the SSB period of the target cell or the SS / PBCH block Measurement Timing Configuration (SMTC) period of the target cell. The purpose of the terminal measuring the SSB of the target cell is to obtain the downlink synchronization timing of the target cell in order to determine the uplink synchronization reference for sending the random access preamble to the target cell.

[0058] Step 203: The terminal sends a wake-up signal (WUS) to the target cell based on the downlink synchronization timing;

[0059] In this embodiment, after determining the downlink synchronization timing of the target cell, the terminal prepares for RACH transmission and waits for a suitable RACH occasion. When the suitable RACH occasion arrives, the UE sends a WUS to the target cell. The WUS is a random access preamble sequence used to trigger system information transmission. Therefore, the process of the UE sending the WUS and receiving a response is a RACH process. During this RACH process, the terminal sending the WUS may include sending the RACH preamble sequence to the target cell, also known as sending message 1 (msg1) of the random access procedure.

[0060] Step 204: The terminal receives a System Information Block (SIB) based on the first response message sent by the target cell.

[0061] After the terminal sends a WUS to the target cell, the target cell receives the WUS and sends a first response message back to the terminal. The first response message is a response message to the WUS. The first response message can be a Random Access Response (RA) message (RAR), or it can be called message 2 (msg2) of the random access procedure.

[0062] The first response message may indicate relevant information about the SIB that the target cell is about to send, such as SIB scheduling information. The terminal receives the SIB sent by the target cell based on the first response message. The SIB may be SIB1, triggered by the terminal via WUS, and may also be referred to as OD-SIB1.

[0063] In an embodiment of this application, the terminal determines a target cell from the neighboring cells of the current serving cell. Before initiating random access to the target cell, it measures the SSB of the target cell to determine the downlink synchronization timing corresponding to the target cell. Based on the downlink synchronization timing, it sends a WUS to the target cell and then receives system information sent by the target cell. By obtaining the downlink synchronization timing of the target cell, the synchronization accuracy of sending the WUS to the target cell and receiving the response message from the target cell can be guaranteed to be higher, avoiding performance loss in the information transmission and reception process.

[0064] As an optional embodiment, determining the target cell includes:

[0065] In idle state, measurements are performed on neighboring cells of the current serving cell based on a first cycle to obtain measurement results; the first cycle is determined according to the paging cycle.

[0066] Based on the measurement results, the neighboring cell that meets the first condition is determined to be the target cell;

[0067] The first condition includes:

[0068] The terminal's current serving cell has configured WUS for the neighboring cells;

[0069] The signal quality of the adjacent cells meets the cell reselection criteria.

[0070] Here, the cell reselection condition can be a condition determined by the idle-state UE based on network configuration for changing the serving cell. When the UE determines that the cell reselection condition is met, it performs cell reselection. The cell reselection condition can be a threshold for the signal quality difference between cells. For example, based on measurement, if the UE determines at a certain time that the measured signal quality of one or more cells is better than the signal quality of the currently serving cell by more than 3dB, then it determines the neighboring cell with the best signal quality among these cells, thus satisfying the cell reselection condition. Another example is that, based on measurement, if the UE determines at a certain event that the signal quality of a neighboring cell at a certain frequency point is better than a certain threshold, such as RSRP > -104dBm, then it determines that the neighboring cell at that frequency meets the cell reselection condition.

[0071] It is important to note that although the network configuration related to cell reselection conditions can be a type of broadcast information, i.e., information configured through the SIB, it does not mean that all UEs within a certain cell need to share the same set of cell reselection conditions. Network-side equipment can limit the availability of cell reselection conditions. For example, network-side equipment can configure frequency points or cell offsets for a specific group of UEs, so that the cell reselection conditions for UEs in this specific group are different from those for other UEs.

[0072] Here, the terminal's currently serving cell can configure WUS settings for some of its neighboring cells, and the currently serving cell sends the configured WUS settings to the terminal. Based on measurements, the terminal can determine that the signal quality meets the cell reselection conditions, and that the neighboring cells of the currently serving cell with the configured WUS settings are the target cells.

[0073] As an optional embodiment, it further includes: for the UE that is capable of sending WUS to the target cell to obtain System Information Block (SIB), the network-side device will configure cell reselection conditions separately for it, that is, the cell reselection conditions for UEs that support sending WUS to the target cell are different from those for UEs that do not support sending WUS to the target cell, so as to avoid UEs that do not support sending WUS from reselecting to the target cell that requires sending WUS to obtain SIB, thereby avoiding performance loss caused by unnecessary reselection.

[0074] In this embodiment, the terminal measures neighboring cells of the serving cell in the idle state based on a first period. The first period is determined according to the paging period, for example: the first period is an integer multiple of the paging period, or the first period is the paging period. Based on the measurement results in the idle state, the terminal determines the target cell among the neighboring cells that meets a first condition. The first condition may include: the current serving cell has configured a corresponding WUS configuration for the target cell, and the target cell meets the cell reselection condition.

[0075] As an optional embodiment, measuring the synchronization signal block (SSB) of the target cell to obtain the downlink synchronization timing corresponding to the target cell includes:

[0076] The SSB of the target cell is measured to obtain the downlink synchronization timing corresponding to at least one SSB of the target cell;

[0077] Obtain the downlink synchronization timing corresponding to the target cell from the downlink synchronization timing corresponding to the at least one SSB.

[0078] In this embodiment, the SSB measurement of the target cell can be performed according to the SSB period or the SMTC period of the target cell. By measuring the SSB, the downlink synchronization timing of the target cell can be obtained, which is used to determine the uplink synchronization reference for sending WUS to the target cell. When multiple SSBs exist in the target cell, the terminal can obtain the downlink synchronization timing based on one or more of the SSBs.

[0079] Optionally, obtaining the downlink synchronization timing corresponding to the target cell from the downlink synchronization timing corresponding to the at least one SSB includes:

[0080] The downlink synchronization timing corresponding to the target cell is determined based on any one or more SSBs from the downlink synchronization timing corresponding to the at least one SSB.

[0081] The downlink synchronization timing corresponding to the target cell is determined based on the target SSB from the downlink synchronization timing corresponding to the at least one SSB, wherein the target SSB is one or more SSBs configured with random access resources in the target cell.

[0082] In this embodiment, when multiple SSBs exist in the target cell, the terminal can determine the downlink synchronization timing based on any one or more SSBs within the target cell. In this case, the reference timing for the UE to send the RACH preamble is the cell-level reference timing of the target cell. Alternatively, the UE can assume that the synchronization error between the SSBs of the target cell is small, for example, not exceeding the cyclic prefix (CP) or CP / 2. CP is the cyclic prefix length of the subcarrier spacing (SCS) corresponding to the target cell.

[0083] Alternatively, when multiple SSBs exist in the target cell, the UE can also determine the downlink synchronization timing based on one or more SSBs specified by the network side within the target cell. The network side specification may involve configuring random access resources. For example, assuming the target cell has 7 SSBs, but only 4 of them are configured with Contention Based Random Access (CBRA) resources or other forms of Random Access (RA) resources for UE to transmit WUS, then the UE determines the cell-level timing of the target cell based solely on these 4 SSBs during the downlink synchronization timing determination process.

[0084] Optionally, the terminal measures the Synchronization Signal Block (SSB) of the target cell to obtain the duration of the downlink synchronization timing process corresponding to the target cell, including: the duration for neighboring cell synchronization determined based on the SSB period (or SMTC period) and / or the arrival time of the first SSB; the duration for Automatic Gain Control (AGC) adjustment determined based on the SSB period (or SMTC period) and / or the arrival time of the first SSB; and the duration of SSB processing.

[0085] It should be noted that when reselecting to a cell that periodically transmits SIB1, the UE also needs to perform the target cell's Synchronization Signal Block (SSB) measurement to obtain SIB1. However, since there is no WUS transmission process, when reselecting to a cell that periodically transmits SIB1, the duration for the terminal to perform the target cell SSB measurement is less than or equal to the duration of the target cell SSB measurement described in this embodiment.

[0086] After determining the downlink synchronization timing, the terminal sends a WUS to the target cell based on the downlink synchronization timing and receives a response message from the target cell. Based on the response message, it receives the SIB. The duration for which the terminal detects the response message includes: the time the terminal waits for the response; and the time the terminal decodes the response. After correctly decoding the response message, the terminal can determine that the target cell is about to start transmitting OD-SIB1, and the terminal detects OD-SIB1 at the appropriate location.

[0087] As an optional embodiment, the method further includes: stopping receiving paging messages sent by the current serving cell during a first time period;

[0088] The start time of the first time period is the time when the terminal determines the target cell;

[0089] The end time of the first time period is the time it takes for the terminal to complete the necessary system information decoding.

[0090] In this embodiment, the terminal stopping the reception of paging messages sent by the current serving cell can be understood as the terminal interrupting the reception of paging messages from the current serving cell, or the terminal ceasing to receive paging messages sent by the current serving cell. From the moment the terminal determines the target cell according to the first condition until the terminal completes SIB1 and the necessary SIB decoding, the terminal is allowed to interrupt the paging reception of the current serving cell. For example, from the moment the UE begins to perform SSB measurement to obtain downlink synchronization timing for the target cell until the UE completes the detection of the necessary system information of the target cell, the UE is allowed to interrupt the paging reception of the serving cell.

[0091] For example, the first time period may include: the time for the terminal to prepare and measure the SSB of the target cell to obtain downlink synchronization timing, the time for the terminal to prepare and send WUS, the time for the terminal to prepare and receive the random access response message, the time for the terminal to decode the random access response message, the time for the terminal to prepare and receive the SIB, and the time for the terminal to decode the SIB, etc. During this part of the time period, the terminal may interrupt the paging reception of the serving cell.

[0092] Optionally, the duration of the first time period includes: the time from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell until it receives the random access response message; and the time from when the terminal receives the random access response message until the terminal completes SIB decoding.

[0093] In this embodiment, the random access response message can be either the first response message or the second response message. The terminal can stop receiving paging messages from the current serving cell during the first time period. This can also be understood as: the terminal can stop receiving paging messages from the current serving cell during the period from preparing to send WUS (e.g., when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing) until the terminal receives the random access response message; or the terminal can stop receiving paging messages from the current serving cell during the period from receiving the random access response message until the terminal completes SIB decoding.

[0094] Optionally, the duration of the first time period is less than or equal to the sum of the second and third time periods. This can also be understood as the terminal ceasing to receive paging messages from the current serving cell during the time periods corresponding to the second and third time periods.

[0095] The second duration includes: a duration determined based on the SSB period and / or the arrival time of the first SSB;

[0096] Random access preparation time;

[0097] The duration of waiting for a random access opportunity;

[0098] Duration for sending the random access preamble sequence;

[0099] The duration for waiting to receive a random access response message;

[0100] Duration for receiving random access response messages;

[0101] Duration of decoding random access response messages.

[0102] The second duration is the sum of all the aforementioned durations. The terminal may stop receiving paging messages sent by the current serving cell during the time period corresponding to this second duration.

[0103] Optionally, the third duration can be at least one of the following: an integer multiple of the system information transmission window length; an integer multiple of the maximum transmission period of system information; or an integer multiple of the paging period. The terminal may stop receiving paging messages sent by the current serving cell during the time period corresponding to this third duration.

[0104] As an optional embodiment, the method further includes at least one of the following:

[0105] Based on the decoding result of the SIB, determine whether to camp in the target cell;

[0106] Based on the decoding result of the SIB, obtain at least one of the following information of the target cell: WUS configuration, idle state measurement configuration, and cell reselection configuration.

[0107] In this embodiment, after the terminal completes SIB1 and necessary SIB decoding, it can determine whether to camp on the target cell based on the decoding result. This can also be understood as changing the target cell to the serving cell. For example, assuming the UE is configured based on SIB1 and determines that it needs to camp on the target cell, the UE further determines other system information, such as the scheduling status of Other System Information (OSI), based on the SIB1 configuration. After completing OSI detection, the UE completes the necessary SI information collection, and the UE can complete the reselection in two Discontinuous Reception (DRX) cycles. During these two DRX cycles, the UE cannot normally receive downlink paging signals from the original serving cell (i.e., the current serving cell, which can also be understood as the serving cell to which the target cell previously belonged). Therefore, after determining the target cell, the terminal is allowed to interrupt receiving paging signals from the original serving cell until it completes the necessary SIB detection and decoding.

[0108] Based on the decoding result of the SIB, the terminal can also obtain the WUS configuration of the target cell, and initiate a random access procedure to the target cell according to the WUS configuration. Optionally, the terminal can also determine whether to camp on the target cell based on the decoding result of the SIB; after camping on the target cell, the terminal obtains the WUS configuration of the target cell from the system information of the target cell based on the decoding result of the SIB.

[0109] Optionally, based on the decoding result of the SIB, the terminal can also obtain the idle state measurement and / or cell reselection configuration of the target cell, thereby performing relevant measurements based on the idle state measurement configuration, and performing cell reselection according to whether the reselection conditions are met.

[0110] As an optional embodiment, the method further includes:

[0111] If the terminal is camped in the target cell, and the second condition is met, it is determined to execute the on-demand SIB request;

[0112] The second condition includes one of the following:

[0113] The total duration starting from the last successful reception of the SIB is greater than or equal to a first duration, which includes the effective duration of the SIB.

[0114] The terminal receives a first signaling message sent by the target cell, which is used to indicate system information updates.

[0115] In this embodiment, after the terminal camps on the target cell, if it determines that the second condition is met, it determines that an OD-SIB1 request needs to be executed. For example, starting from the moment of the most recent successful SIB reception before the current moment, if the timing duration is greater than or equal to a first duration, it determines that an on-demand SIB transmission request needs to be executed. Optionally, a first timer can be set, the timing duration of which is the first duration, and the starting condition of the first timer is that the UE successfully receives an SIB on the target cell. The first duration can be the validity duration of the SIB, such as the validity time of SIB1 and / or other SIBs. It can also be understood as determining to execute an on-demand SIB transmission request after the validity duration of the last received SIB has been reached. The first duration can be an agreed fixed value. Before the first timer expires, the UE cannot initiate random access to the target cell again to obtain an SIB.

[0116] In this embodiment, if the UE successfully transmits RACH and obtains all SIB1s and necessary SIBs in the previous transmission, it is only allowed to transmit RACH again to obtain SIB1s and valid SIBs after an interval of at least a first time period; alternatively, the terminal is only allowed to transmit RACH again to obtain SIB1s and valid SIBs after receiving a network indication. This design ensures that the UE will not frequently transmit RACH to obtain SIB1s and valid SIBs, which is beneficial for network energy saving.

[0117] Optionally, the minimum interval for the terminal to initiate RACH needs to be greater than the first duration. This can also be understood as: if the UE successfully completes the target cell camping based on OD-SIB1, the UE can only send the RACH request OD-SIB1 again after the first duration has elapsed since the completion of camping.

[0118] Alternatively, if the terminal receives a first signaling message from the network side indicating an SIB update, the terminal will determine to execute an OD-SIB1 request. The OD-SIB1 request can be understood as sending a WUS request for SIB1. The first signaling message can be carried by a paging message, which is a paging message sent by the target cell.

[0119] This embodiment can ensure that the UE can obtain SIB1 and valid SIB without frequently sending RACH, which is beneficial to reduce UE power consumption while achieving network energy saving.

[0120] As an optional embodiment, the method further includes:

[0121] According to the WUS configuration of the target cell, send WUS to the target cell;

[0122] Receive the second response message sent by the target cell;

[0123] The availability of SIBs for on-demand delivery is determined based on the second response message;

[0124] Detect SIBs sent on demand.

[0125] In this embodiment, after the terminal determines that an OD-SIB1 request needs to be executed, it can initiate a random access procedure based on the WUS configuration obtained by decoding the SIB. This involves sending the WUS to the target cell and receiving a second response message from the target cell. This second response message is the response RAR for this random access procedure, and can also be understood as a response message to the WUS. The second response message may contain the same content as the first response message, but they are responses to different WUS. Based on the received second response message, the terminal can determine that OD-SIB1 is available and detect OD-SIB1 and / or OD-OSI.

[0126] The determination that the SIB to be sent on demand is available can be understood as the terminal determining that the network side (the target cell) has started sending SIB1, and the terminal can start detecting the scheduling of SIB1 in the corresponding search space; or, the terminal can also detect the SIB to be sent on demand based on the second response message when it receives the second response message.

[0127] In this embodiment, when the terminal is camped on the target cell, it changes the target cell to the terminal's serving cell. Before the terminal sends WUS to the target cell, it further includes: measuring the SSB of the target cell to obtain the downlink synchronization timing of the target cell, and the terminal sends WUS to the target cell based on the downlink synchronization timing.

[0128] As an optional embodiment, the method further includes:

[0129] Based on the second signaling sent by the target cell, it is determined that the SIBs to be sent on demand are available;

[0130] Detect SIBs sent on demand.

[0131] In this embodiment, the terminal can also determine the availability of OD-SIB1 based on the second signaling sent by the target cell. This can also be understood as the terminal determining whether the network side is already sending OD-SIB1 and / or OD-OSI based on the second signaling sent by the network side. If the second signaling indicates that the network side is already sending SIB1, the terminal can begin detecting SIB1 scheduling in the corresponding search space. The second signaling can be carried by a paging message, which is a paging message sent by the target cell. Alternatively, the terminal can also detect on-demand SIBs based on the second signaling received from the target cell.

[0132] Optionally, the first and second signaling sent by the target cell can be carried by different paging messages, or they can be carried by the same paging message. For example, in the paging message carrying the second signaling, there is a 1-bit indicator bit to indicate whether the paging message also indicates a system information update.

[0133] As an optional embodiment, the duration of the random access procedure performed by the terminal is less than or equal to the second duration; the duration of the random access procedure includes: the duration from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell until it receives the response message;

[0134] The second duration includes:

[0135] 1) The duration determined based on the SSB period and / or the arrival time of the first SSB; this duration is the duration for synchronization of the target cell, and optionally, it may also be the duration determined based on the SMTC period and / or the arrival time of the first SSB.

[0136] 2) Random access preparation time; for example, RACH preparation time.

[0137] 3) The duration of waiting for a random access occasion; this can be understood as the duration of the terminal waiting for a RACH occasion.

[0138] 4) Duration of sending the random access preamble; sending the random access preamble can be understood as sending WUS.

[0139] 5) Duration of waiting to receive the random access response message; this can be understood as the time the UE waits to receive the RACH response.

[0140] 6) Duration for receiving random access response messages; the random access response message can be understood as the response message corresponding to the terminal sending WUS.

[0141] 7) The duration of decoding the random access response message can be understood as the time it takes for the UE to decode the RACH response.

[0142] In this embodiment, when the UE determines that a RACH needs to be initiated, for example, when the UE determines that a first condition is met, or when the UE confirms that system information needs to be updated, the UE executes a random access procedure. The execution duration of this random access procedure is less than or equal to a second duration. The execution duration of the random access procedure may include: the timer for the terminal to measure the SSB of the target cell to obtain the downlink synchronization timer corresponding to the target cell, until the terminal receives and decodes the RAR. The second duration includes all the above durations, that is, the second duration is the sum of all the above durations. This embodiment can ensure that the terminal's random access procedure will not be too long, thereby helping to reduce the impact on the UE's paging message reception performance while achieving network energy saving.

[0143] Optionally, the terminal may interrupt paging reception in the current serving cell during the second duration.

[0144] Optionally, the second duration may further include at least one of the following:

[0145] The duration used for automatic gain control (AGC) adjustment; for example, the duration used for AGC adjustment determined based on the SSB cycle (or SMTC cycle) and / or the arrival time of the first SSB.

[0146] The duration of physical random access preamble retransmission, which can be understood as WUS retransmission.

[0147] In this embodiment, the second duration may further include the duration for AGC adjustment, and / or the duration for the UE to perform PRACH preamble retransmission, the duration for performing PRACH preamble retransmission including waiting for the RACH occasion.

[0148] As an optional embodiment, the wake-up time window sent by the terminal to the WUS is located in a different time domain than the wake-up time window received by the terminal from the SIB; wherein, the wake-up time window is a wake-up time window that appears periodically based on the paging cycle determined by the terminal.

[0149] In this embodiment, the terminal determines multiple periodically occurring wake-up time windows based on the paging cycle. The wake-up time window for the terminal to send WUS is located in a different time domain than the wake-up time window for the terminal to receive SIBs. Optionally, it can also be understood that the transmission of WUS and the reception of SIBs can belong to different paging cycles. Optionally, the wake-up time window for the terminal to send WUS and the wake-up time window for the terminal to receive SIBs can be separated by a duration greater than one paging cycle. Through this design, it can be ensured that within each DRX wake-up opportunity, the UE only performs WUS transmission and RACH response reception, or only performs SIB1 and / or other SIB transmission and reception, and the UE wake-up time is not too long, which helps the UE achieve power saving.

[0150] It should be noted that, since the duration of the first time period includes the time from when the terminal sends the WUS to when it receives the random access response message, and the time from when the terminal receives the random access response message to when it completes SIB decoding, the first time period can include multiple wake-up time windows. Therefore, allowing the UE to send and receive WUS and RACH responses, as well as transmit and receive SIB1 and / or other SIBs, within different time windows means that the UE is allowed to interrupt the paging reception within more wake-up time windows. This achieves energy saving in the UE's idle state with limited performance overhead.

[0151] As an optional implementation, the time from when the terminal receives the response message to when the terminal completes SIB decoding is less than or equal to the third time.

[0152] The third duration is at least one of the following:

[0153] An integer multiple of the system information sending window length;

[0154] An integer multiple of the maximum period for sending system information;

[0155] Integer multiples of the paging cycle.

[0156] In this embodiment, after the terminal sends WUS, it can receive a random access response, such as the first response message or the second response message. From the moment the terminal receives the response message until the terminal completes the necessary SIB (such as SIB1 and other related SIBs) reception and decoding, the duration of this period is less than or equal to a third duration. The third duration can be an integer multiple of the system information transmission window length, and / or an integer multiple of the maximum period for transmitting system information, and / or an integer multiple of the paging reception period. Optionally, the terminal can interrupt paging reception in the current serving cell during this third duration. This embodiment can ensure that the process of the terminal performing SIB reception and decoding does not take too long, thereby helping the UE to achieve power saving.

[0157] As an optional embodiment, the method further includes:

[0158] Upon receiving the response message or upon receiving the first signaling, the SIB is detected within the fourth time period;

[0159] The fourth duration is agreed upon by the protocol or pre-configured, and the fourth duration is the shortest duration for the target cell to send SIBs.

[0160] In this embodiment, the response message can be a random access response message, such as the first response message or the second response message. After receiving the response message, the terminal can assume that the target cell is periodically and continuously broadcasting SIBs within the fourth duration. Alternatively, if the terminal receives a first signaling message from the target cell instructing a system information update, it can assume that the target cell is periodically and continuously broadcasting SIBs within the fourth duration. The terminal then detects the SIBs within the fourth duration. The fourth duration can be agreed upon by a protocol or pre-configured by the network. The fourth duration can be the shortest duration for the target cell to send SIBs.

[0161] For example, upon receiving a RAR or the first signaling message, the terminal assumes that the network has been continuously broadcasting SIB1 at a period of 160ms for at least the fourth duration; or, the terminal assumes that the SIB configured for broadcasting has been continuously broadcasting at the period given by the SI scheduling information for at least the fourth duration. During the fourth duration, the UE can directly detect OD-SIB1 and OD-OSI without initiating RACH again, thereby achieving the goal of saving UE power.

[0162] Optionally, the number of times the terminal sends WUS in each paging cycle is less than or equal to a first value, which is agreed upon by the protocol or pre-configured.

[0163] In this embodiment, when the terminal needs to retransmit RACH multiple times to correctly receive RAR, the number of times the UE performs RACH transmission within each DRX cycle can not exceed a first value, which is a protocol-limited value or a network-preconfigured value. For example, the first value is 8 or 1. The paging cycle can be an idle DRX cycle. This design ensures that the UE does not transmit too many RACHs within each DRX wake-up opportunity. If RACH fails, the UE waits until the next wake-up time window determined based on the DRX cycle before attempting to retransmit RACH, thus ensuring that the UE wake-up time within each DRX wake-up opportunity is not too long, which helps the UE save power.

[0164] It should be noted that since the duration of the first time period includes the time from when the terminal sends the WUS to when it receives the random access response message, and the time from when the terminal receives the random access response message to when it completes SIB decoding, the first time period can include multiple wake-up time windows. Therefore, allowing the UE to attempt PRACH transmission multiple times within different time windows means that the UE is allowed to interrupt the reception of paging within more wake-up time windows. This achieves energy saving in the UE's idle state with limited performance cost.

[0165] The following example illustrates how a terminal requests and receives SIBs.

[0166] Example 1: As shown in Figure 3, in the OD-SIB1 scenario, the cell reselection behavior of an idle UE can be described as follows:

[0167] Step 31: The UE performs measurements of the serving cell, co-frequency neighboring cells, and inter-frequency neighboring cells in idle state. These measurements may include cell discovery (i.e., PSS / SSS detection) and cell measurement. Whether the measurement is for the serving cell or neighboring cells, the idle state DRX period is used as the measurement period. Based on the measurement results, the UE determines whether the first condition is met.

[0168] The first condition may be that the current serving cell is configured with WUS and the adjacent cell meets the cell reselection conditions.

[0169] Optionally, assuming the UE determines that the target cell meets the first condition, the UE may perform one of the following actions:

[0170] To determine this directly, you need to send a RACH message to obtain the SIB1 of the target cell.

[0171] The UE determines whether it currently possesses a valid SIB1 for the target cell and the corresponding necessary SIBs. Only if the UE does not possess a valid SIB1 for the target cell will it determine that it needs to transmit RACH to obtain the SIB1 and necessary SIBs. Specifically, if the UE successfully transmitted RACH and obtained all SIB1s and necessary SIBs in the previous transmission, it is only allowed to transmit RACH again to obtain SIB1s and valid SIBs after a certain interval (such as the first interval). This design ensures that the UE will not frequently transmit RACH to obtain SIB1s and valid SIBs, thus contributing to network energy efficiency.

[0172] Step 32: After the UE determines that the target cell meets the first condition and determines that it needs to obtain the SIB1 of the target cell by sending RACH, the UE continues to measure the current serving cell and co-frequency neighboring cells, and also performs measurement on the SSB of the target cell.

[0173] The SSB measurement of the target cell can be performed according to either the target cell's SSB period or the target cell's SMTC period. The purpose of performing the SSB measurement is to obtain the downlink synchronization timing of the target cell in order to determine the uplink synchronization reference for sending the random access preamble to the target cell.

[0174] When the target cell has multiple SSBs:

[0175] Optionally, the UE can determine the downlink synchronization timing based on any one or more SSBs within the target cell. In this case, the reference timing for the UE to send the RACH preamble is the cell-level reference timing of the target cell. The UE can assume that the synchronization error between the SSBs of the target cell is small, for example, not exceeding CP or CP / 2. CP is the cyclic prefix length under the corresponding SCS of the target cell.

[0176] Optionally, the UE can also determine the downlink synchronization timing based on one or more SSBs specified by the network side within the target cell. For example, assuming there are 7 SSBs in the target cell, but the network side only configures CBRA resources or other forms of RA resources for 4 of these SSBs for the UE to transmit WUS, then the UE determines the cell-level timing of the target cell based solely on these 4 SSBs during the process of determining the downlink synchronization timing of the target cell.

[0177] The time required for the terminal to perform SSB measurement on the target cell includes:

[0178] The duration for neighboring cell synchronization, determined based on the SSB period (or SMTC period) and / or the arrival time of the first SSB, for example, 20ms;

[0179] The duration for AGC adjustment, determined based on the SSB cycle (or SMTC cycle) and / or the arrival time of the first SSB, for example, 20ms;

[0180] The duration of SSB processing, for example, 2ms.

[0181] Step 33: After obtaining the downlink synchronization timing of the target cell, the UE prepares for RACH transmission and waits for a suitable RACH transmission opportunity. When the suitable RACH opportunity arrives, the UE sends the RACH preamble sequence (also known as msg1) to the target cell, which can also be understood as sending WUS.

[0182] The duration of the RACH procedure executed by the terminal includes:

[0183] RACH preparation time, for example, 4ms;

[0184] The duration to wait for a RACH occasion, for example, 10ms.

[0185] Step 34: After completing the transmission of the RACH preamble, the UE detects the RACH response message (RAR, also known as msg2) within a detection window determined based on network configuration.

[0186] The duration for the terminal to detect the RACH response includes:

[0187] The time the UE waits for a RACH response, for example, 10ms;

[0188] The time it takes for the UE to decode the RACH response, for example, 3ms.

[0189] If the UE fails to correctly decode its own RACH response, i.e. msg2 reception fails, the UE needs to go back to step 33 or step 32 to prepare for the transmission of the RACH preamble with increased power, and then retransmit the RACH.

[0190] Assuming the UE can correctly decode its own RACH response, based on the RACH response, the UE determines that the corresponding target cell will start transmitting OD-SIB1, and can proceed to step 35.

[0191] Step 35: The UE determines the scheduling status of OD-SIB1 transmission in the target cell based on the network-side configuration or RAR. After that, the terminal detects the scheduling of SIB1 in the corresponding control channel resource set (CORESET) search space.

[0192] To better achieve both network energy saving and UE energy saving, for the transmission of OD-SIB1 and related necessary SIBs, the UE can assume that the network will continuously transmit OD-SIB1 and necessary OSIs for at least a fourth time period, according to the configured period and scheduling information. This allows both the network and the UE to have a consistent understanding of the transmission of OD-SIB1 and OD-OSI. Within the fourth time period, the UE can directly detect OD-SIB1 and OD-OSI without initiating RACH again, thus achieving UE power saving. The fourth time period can be determined based on network configuration or protocol limitations.

[0193] OD-OSI can differ from traditional OD-OSI. In traditional OD-OSI, when SIB1 provides SI scheduling information, the corresponding scheduling information group needs to indicate that the corresponding OSI is non-broadcast, meaning the UE needs to obtain it by sending a RACH request. However, in this embodiment, considering that SIB1 itself is also sent based on UE requests, OD-OSI also includes the case where SIB1 provides OSI scheduling information indicating that the corresponding OSI is broadcast.

[0194] The duration of terminal SIB detection includes:

[0195] The waiting time from the completion of RACH response reception to the next successful detection of SIB1 scheduling. Considering the worst case, this process may take 160ms (the longest transmission period in the case of SIB1 broadcast);

[0196] The decoding time for the control and data channels corresponding to SIB1 is no more than 2ms.

[0197] The decoding time of SIB1 in RRC is no more than 20ms.

[0198] Step 36: If SIB1 is successfully detected, the UE determines whether to complete camping in the target cell based on the configuration in SIB1.

[0199] Assuming the UE is configured based on SIB1 and determines that it needs to complete camping in the target cell, the UE will further determine other system information, such as the OSI scheduling status, based on the SIB1 configuration. Considering that the time interval between the OSI scheduling opportunity and the moment of successful SIB1 decoding may be greater than 320ms or 640ms (depending on the OSI scheduling configuration), the UE can wait until the next paging cycle before completing the reception of various OSI parameters.

[0200] OSI reception involves multiple SI scheduling windows, each typically 80ms in length. Therefore, the UE needs to detect the corresponding OSI within each SI scheduling window. Thus, in calculating the time required for this process, assuming the UE needs to detect the OSI within two consecutive scheduling windows, the time would be approximately 160ms.

[0201] After completing OSI detection, the UE completes the necessary SI information collection. The UE requires two DRX cycles to complete the reselection. During these two DRX cycles, the UE cannot normally receive downlink paging signals from the original serving cell. From step 32, when the UE begins performing SSB measurements on the target cell to obtain downlink synchronization timing, until step 36, when the UE completes the detection of the necessary system information for the target cell, the UE is allowed to interrupt paging reception from the serving cell.

[0202] It should be noted that some UE implementations may skip part of step 36 during cell reselection, meaning that after receiving SIB1, the terminal directly determines to camp on the target cell. After determining camping, it then seeks an opportunity to receive OSI signals. For example, if the UE determines, based on the signal quality of the new serving cell (the target cell), that the SIB2 / 3 / 4 information used for cell reselection in the new serving cell is not urgent, the UE can then seek an opportunity to receive SIB2 / 3 / 4 later. This application does not exclude such UE implementation behavior.

[0203] Optionally, after the terminal completes its camping in the target cell, the UE can also determine the validity of the SIB1 information and OSI based on a timer pre-configured by the network side or a pre-configured validity period. When the SIB1 and OSI expire, the UE can send a RACH to reacquire the SIB1 and / or OSI. Based on this design, the network side can effectively avoid the UE frequently sending OD-SIB1 requests.

[0204] Optionally, after completing camping in the target cell, the UE can also determine whether to perform OD-SIB1 and / or OD-OSI updates based on signaling (e.g., first signaling) issued by the network side. This signaling can be carried by a paging message, referred to here as the first paging information. When the terminal receives this message, it retransmits the RACH and decodes SIB1 in the new serving cell based on the OD-SIB1 procedure, i.e., it executes steps 32 to 36 in the serving cell. Since the UE performs this process in the new serving cell, paging interruption is not required unless the Paging Control Channel (PCCH) configuration is changed. This design allows for effective system information updates in the cell corresponding to OD-SIB1.

[0205] Optionally, after completing camping in the target cell, the UE can also determine whether the network is already transmitting OD-SIB1 and / or OD-OSI based on signaling (e.g., second signaling) issued by the network. This signaling can be carried by a paging message, referred to here as the second paging message. When the terminal receives this message, it can directly execute steps 35 to 36 to update SIB1 and the necessary OSI, and reset the timers used to determine the validity of SIB1 and OSI, as well as the timer used to determine whether it is allowed to retransmit RACH to obtain OD-SIB1. Through this design, the network can share the status of broadcasting necessary system information such as SIB1 within the cell, facilitating other UEs to receive OD-SIB1.

[0206] Optionally, the first paging message may also have a similar function to the second paging message. For example, the first paging message and the second paging message may be the same paging message. One possible indication method is that the second paging message contains a 1-bit indicator bit to indicate whether the paging message also indicates an SI update, i.e., the UE needs to reacquire OD-SIB1.

[0207] Example 2: In the OD-SIB1 scenario, the reselection behavior of an idle-state UE can be carried out according to the process shown in Figure 4. The difference between Example 2 and Example 1 is that the terminal sending WUS to the target cell and the terminal receiving SIB can be performed within different wake-up time windows. That is, the wake-up time window for the terminal sending WUS is different from the wake-up time window for the terminal receiving SIB in the time domain.

[0208] Optionally, considering the potential 160ms waiting time in step 35 of Example 1 (the waiting time from the completion of RACH response reception to the next successful detection of SIB1 scheduling), the terminal detection of SIB in step 35, compared with the process in steps 32 to 34: the terminal measuring the SSB of the target cell to obtain downlink synchronization timing, the terminal sending WUS (sending random access preamble) to the target cell, and the terminal receiving the random access response, allows the UE to use different DRX wake-up opportunities to complete, as shown in Figure 4. The UE is allowed to perform (1) WUS transmission + RAR detection and (2) SIB1 reception in different DRX wake-up opportunities. This ensures that the UE wake-up time is short in each DRX wake-up opportunity without significantly affecting network performance, which helps the UE achieve power saving.

[0209] Optionally, considering that after step 34 in Example 1 is completed, the UE may need to return to step 33 or step 32 to re-execute the RACH transmission procedure, and multiple such cycles would significantly increase the UE wake-up time in a single DRX wake-up opportunity. Therefore, in this embodiment, it is assumed that the UE will not execute the RACH retransmission procedure more than X times in each DRX cycle. X can be a protocol-defined value, such as X=8 or X=1. This design ensures that the UE wake-up time is short in each DRX wake-up opportunity, which helps the UE achieve power saving.

[0210] The above are the differences between Example 2 and Example 1. The other execution processes are the same, so they will not be repeated here.

[0211] It should be noted that the original serving cell in this application (i.e., the serving cell camped before the target cell) can be a 4G LTE cell, that is, providing WUS configuration and other information to the potential target cell on the LTE cell to facilitate IRAT cell reselection, or it can be a 5G cell; there is no limitation here. This application can be applied not only to 5G communication systems but also to 6G communication systems.

[0212] In an embodiment of this application, the terminal determines a target cell from the neighboring cells of the current serving cell. Before initiating random access to the target cell, it measures the SSB of the target cell to determine the downlink synchronization timing corresponding to the target cell. Based on the downlink synchronization timing, it sends a WUS to the target cell and then receives system information sent by the target cell. By obtaining the downlink synchronization timing of the target cell, the synchronization accuracy of sending the WUS to the target cell and receiving the response message from the target cell can be guaranteed to be higher, avoiding performance loss in the information transmission and reception process.

[0213] As shown in Figure 5, this application embodiment also provides a method for sending system information, applied to a network-side device, wherein the network-side device is a target cell, and the method includes:

[0214] Step 501: The network-side device receives the WUS sent by the terminal, wherein the configuration information of the WUS is configured by the terminal's current serving cell;

[0215] Step 502: The network-side device sends a first response message to the terminal;

[0216] Step 503: The network-side device sends an SIB to the terminal.

[0217] In this embodiment, when the terminal is camped on the serving cell, it can measure the neighboring cells of the current serving cell to determine that the neighboring cell that meets the first condition is the target cell. The SSB of the target cell is measured to obtain the downlink synchronization timing of the target cell; the terminal sends a WUS to the target cell based on the downlink synchronization timing. The target cell (the network-side device) receives the WUS sent by the terminal and sends a first response message to the terminal. This first response message can indicate relevant information about the SIB that the target cell is about to send, such as SIB scheduling information. The target cell sends the SIB based on the scheduling information; the terminal receives the SIB according to the first response message.

[0218] Optionally, the method further includes: sending a first signaling message to the terminal, the first signaling message being used to indicate system information updates.

[0219] In this embodiment, when system information needs to be updated, the network side sends a first signaling message to the terminal. This first signaling message indicates that the system information needs to be updated. After receiving the first signaling message from the network side, the terminal determines to execute the OD-SIB1 request. The OD-SIB1 request can be understood as sending a WUS request SIB1. The first signaling message can be carried by a paging message.

[0220] Optionally, the method further includes sending a second signaling message to the terminal, the second signaling message being used to indicate that on-demand SIBs are available.

[0221] In this embodiment, when the network side is preparing to send an SIB, it can send a second signaling message to the terminal, indicating that the SIB is about to be sent. Upon receiving the second signaling message, the terminal determines that OD-SIB1 is available; this can also be understood as the terminal determining whether the network side is already sending OD-SIB1 and / or OD-OSI based on the second signaling message. If the second signaling message indicates that the network side is already sending SIB1, the terminal can begin detecting SIB1 scheduling in the corresponding search space. The second signaling message can be carried by a paging message.

[0222] Optionally, the method further includes: sending configuration information for a fourth duration to the terminal, wherein the fourth duration is the shortest duration for sending the SIB.

[0223] In this embodiment, the fourth duration is the shortest duration for the target cell to transmit the SIB. The network side indicates the shortest duration for transmitting the SIB to the terminal. After receiving the random access response message, the terminal can assume that the network side is periodically and continuously broadcasting the SIB within the fourth duration. The terminal then detects the SIB within the fourth duration.

[0224] In embodiments of this application, the network-side device receives a WUS sent by the terminal. The WUS is sent by the terminal based on downlink synchronization of the network-side device. The terminal's timing of sending the WUS based on downlink synchronization of the network-side device ensures higher synchronization accuracy between sending the WUS and receiving random access response messages, avoiding performance loss during information transmission and reception.

[0225] The system information acquisition method provided in this application can be executed by a system information acquisition device. This application uses an example of a system information acquisition device executing the system information acquisition method to illustrate the system information acquisition device provided in this application.

[0226] This application provides a system information acquisition device and a system information transmission device. As an example, the system information acquisition device or the system information transmission device may be a communication device or a component in a communication device, such as a chip. The communication device may be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal may include, but is not limited to, the type of terminal 11 listed above, and the network-side device may include, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0227] The system information acquisition device or system information transmission device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, etc., such as central processing units (CPUs), microprocessors, digital signal processors (DSPs), artificial intelligence (AI) processors, graphics processing units (GPUs), application-specific integrated circuits (ASICs), network processors (NPs), field-programmable gate arrays (FPGAs), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceivers, pins, circuits, buses, radio frequency units, etc.

[0228] Specifically, referring to Figure 6, when the system information acquisition device is a terminal or a component within a terminal, the system information acquisition device 600 includes:

[0229] The first processing module 610 is used to determine the target cell, which is a cell among the neighboring cells of the terminal's current serving cell that meets the first condition.

[0230] The second processing module 620 is used to measure the synchronization signal block (SSB) of the target cell and obtain the downlink synchronization timing corresponding to the target cell.

[0231] The first transmitting module 630 is used to transmit a wake-up signal WUS to the target cell based on the downlink synchronization timing.

[0232] The first receiving module 640 is used to receive a system information block (SIB) based on a first response message sent by the target cell.

[0233] Optionally, the first processing module is specifically used for:

[0234] In the idle state, measurements are taken on neighboring cells of the current serving cell based on the first cycle to obtain measurement results; the first cycle is determined according to the paging cycle.

[0235] Based on the measurement results, the neighboring cell that meets the first condition is determined to be the target cell;

[0236] The first condition includes:

[0237] The terminal's current serving cell has configured WUS for the neighboring cells;

[0238] The signal quality of the adjacent cells meets the cell reselection criteria.

[0239] Optionally, the second processing module includes:

[0240] The measurement unit is used to measure the SSB of the target cell and obtain the downlink synchronization timing corresponding to at least one SSB of the target cell.

[0241] The acquisition unit is used to acquire the downlink synchronization timing corresponding to the target cell from the downlink synchronization timing corresponding to the at least one SSB.

[0242] Optionally, the acquisition unit is specifically used for:

[0243] The downlink synchronization timing corresponding to the target cell is determined based on any one or more SSBs from the downlink synchronization timing corresponding to the at least one SSB; or...

[0244] The downlink synchronization timing corresponding to the target cell is determined based on the target SSB from the downlink synchronization timing corresponding to the at least one SSB, wherein the target SSB is one or more SSBs configured with random access resources in the target cell.

[0245] Optionally, the device further includes:

[0246] The third processing unit is used to stop receiving paging messages sent by the current serving cell during the first time period;

[0247] The start time of the first time period is the time when the terminal determines the target cell;

[0248] The end time of the first time period is the time it takes for the terminal to complete the necessary system information decoding.

[0249] Optionally, the duration of the first time period includes: the time from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell until it receives the random access response message; and the time from when the terminal receives the random access response message until the terminal completes SIB decoding.

[0250] Optionally, the device further includes at least one of the following:

[0251] The fourth processing module is used to determine the target cell to camp on based on the decoding result of the SIB;

[0252] The fifth processing module is used to obtain at least one of the following information of the target cell based on the decoding result of the SIB: WUS configuration, idle state measurement configuration, and cell reselection configuration.

[0253] Optionally, the device further includes:

[0254] The sixth processing module is used to determine, if the second condition is met, to execute the on-demand SIB request when the terminal is camped in the target cell.

[0255] The second condition includes one of the following:

[0256] The total duration starting from the last successful reception of the SIB is greater than or equal to a first duration, which includes the effective duration of the SIB.

[0257] The terminal receives a first signaling message sent by the target cell, which is used to indicate system information updates.

[0258] Optionally, the device further includes:

[0259] The second sending module is used to send WUS to the target cell according to the WUS configuration of the target cell;

[0260] The second receiving module is used to receive the second response message sent by the target cell;

[0261] The seventh processing module is used to determine, based on the second response message, that the SIB to be sent on demand is available;

[0262] The third receiving module is used to detect SIBs sent on demand.

[0263] Optionally, the device further includes:

[0264] The eighth processing module is used to determine the availability of SIBs for on-demand transmission based on the second signaling sent by the target cell;

[0265] The fourth receiving module is used to detect SIBs sent on demand.

[0266] Optionally, the duration of the random access procedure performed by the terminal is less than or equal to the second duration; the duration of the random access procedure includes: the duration from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell until it receives the response message;

[0267] The second duration includes:

[0268] Duration determined based on the SSB cycle and / or the arrival time of the first SSB;

[0269] Random access preparation time;

[0270] The duration of waiting for a random access opportunity;

[0271] Duration for sending the random access preamble sequence;

[0272] The duration for waiting to receive a random access response message;

[0273] Duration for receiving random access response messages;

[0274] Duration of decoding random access response messages.

[0275] Optionally, the second duration may further include at least one of the following:

[0276] The duration used for automatic gain control (AGC) adjustment;

[0277] The duration of physical random access preamble retransmission.

[0278] Optionally, the wake-up time window of the terminal sending the WUS is different in time domain from the wake-up time window of the terminal receiving the SIB;

[0279] The wake-up time window is a wake-up time window that appears periodically based on the paging cycle determined by the terminal.

[0280] Optionally, the time from when the terminal receives the response message to when the terminal completes SIB decoding is less than or equal to the third time.

[0281] The third duration is at least one of the following:

[0282] An integer multiple of the system information sending window length;

[0283] An integer multiple of the maximum period for sending system information;

[0284] Integer multiples of the paging cycle.

[0285] Optionally, the device further includes:

[0286] The fifth receiving module is used to detect the SIB within a fourth time period upon receiving the response message or upon receiving the first signaling.

[0287] The fourth duration is agreed upon by the protocol or pre-configured, and the fourth duration is the shortest duration for the target cell to send SIBs.

[0288] Optionally, the number of times the terminal sends WUS in each paging cycle is less than or equal to a first value, which is agreed upon by the protocol or pre-configured.

[0289] Referring to Figure 7, when the system information transmitting device is a network-side device or a component within a network-side device, the system information transmitting device 700 includes:

[0290] The sixth receiving module 710 is used to receive WUS sent by the terminal, wherein the configuration information of the WUS is configured by the current serving cell of the terminal;

[0291] The third sending module 720 is used to send a first response message to the terminal;

[0292] The fourth sending module 730 is used to send SIBs to the terminal.

[0293] Optionally, the device further includes:

[0294] The fifth sending module is used to send a first signaling message to the terminal, which is used to indicate system information updates.

[0295] Optionally, the device further includes:

[0296] The sixth sending module is used to send a second signaling to the terminal, the second signaling being used to indicate that the SIB to be sent on demand is available.

[0297] Optionally, the device further includes:

[0298] The seventh sending module is used to send configuration information for a fourth duration to the terminal, wherein the fourth duration is the shortest duration for sending SIB.

[0299] In an embodiment of this application, the terminal determines a target cell from the neighboring cells of the current serving cell. Before initiating random access to the target cell, it measures the SSB of the target cell to determine the downlink synchronization timing corresponding to the target cell. Based on the downlink synchronization timing, it sends a WUS to the target cell and then receives system information sent by the target cell. By obtaining the downlink synchronization timing of the target cell, the synchronization accuracy of sending the WUS to the target cell and receiving the response message from the target cell can be guaranteed to be higher, avoiding performance loss in the information transmission and reception process.

[0300] The system information acquisition method provided in this application embodiment can implement the various processes implemented in the method embodiments of Figures 2 to 4. The system information transmission method provided in this application embodiment can implement the various processes implemented in the method embodiment of Figure 5 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0301] As shown in Figure 8, this application embodiment also provides a communication device 800, including a processor 801 and a memory 802. The memory 802 stores a program or instructions that can run on the processor 801. For example, when the communication device 800 is a terminal, the program or instructions executed by the processor 801 implement the various steps of the above-described system information acquisition method embodiment, and achieve the same technical effect. When the communication device 800 is a network-side device, the program or instructions executed by the processor 801 implement the various steps of the above-described system information acquisition method or system information transmission method embodiment, and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0302] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiment shown in FIG2. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. The terminal may be the system information acquisition device shown in FIG6. Specifically, FIG9 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0303] The terminal 900 includes, but is not limited to, at least some of the following components: radio frequency unit 901, network module 902, audio output unit 903, input unit 904, sensor 905, display unit 906, user input unit 907, interface unit 908, memory 909, and processor 910.

[0304] Those skilled in the art will understand that the terminal 900 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to the processor 910 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 9 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0305] It should be understood that, in this embodiment, the input unit 904 may include a graphics processor 9041 and a microphone 9042. The graphics processor 9041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 906 may include a display panel 9061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0306] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 901 can transmit it to the processor 910 for processing; in addition, the radio frequency unit 901 can send uplink data to the network-side device. Typically, the radio frequency unit 901 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0307] The memory 909 can be used to store software programs or instructions, as well as various data. The memory 909 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 909 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 909 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0308] Processor 910 may include one or more processing units; optionally, processor 910 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 910.

[0309] The processor 910 is configured to: determine a target cell, wherein the target cell is a cell among the neighboring cells of the terminal's current serving cell that meets a first condition; measure the synchronization signal block (SSB) of the target cell to obtain the downlink synchronization timing corresponding to the target cell;

[0310] The radio frequency unit 901 is used to: send a wake-up signal WUS to the target cell based on the downlink synchronization timing; and receive a system information block SIB according to the first response message sent by the target cell.

[0311] Optionally, the processor 910 is specifically used for:

[0312] In the idle state, measurements are taken on neighboring cells of the current serving cell based on the first cycle to obtain measurement results; the first cycle is determined according to the paging cycle.

[0313] Based on the measurement results, the neighboring cell that meets the first condition is determined to be the target cell;

[0314] The first condition includes:

[0315] The terminal's current serving cell has configured WUS for the neighboring cells;

[0316] The signal quality of the adjacent cells meets the cell reselection criteria.

[0317] Optionally, the processor 910 is specifically used for:

[0318] The SSB of the target cell is measured to obtain the downlink synchronization timing corresponding to at least one SSB of the target cell;

[0319] Obtain the downlink synchronization timing corresponding to the target cell from the downlink synchronization timing corresponding to the at least one SSB.

[0320] Optionally, the processor 910 is specifically used for:

[0321] The downlink synchronization timing corresponding to the target cell is determined based on any one or more SSBs from the downlink synchronization timing corresponding to the at least one SSB; or...

[0322] The downlink synchronization timing corresponding to the target cell is determined based on the target SSB from the downlink synchronization timing corresponding to the at least one SSB, wherein the target SSB is one or more SSBs configured with random access resources in the target cell.

[0323] Optionally, the processor 910 is further configured to:

[0324] During the first time period, receiving paging messages from the current serving cell shall be stopped;

[0325] The start time of the first time period is the time when the terminal determines the target cell;

[0326] The end time of the first time period is the time it takes for the terminal to complete the necessary system information decoding.

[0327] Optionally, the duration of the first time period includes: the time from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell until it receives the random access response message; and the time from when the terminal receives the random access response message until the terminal completes SIB decoding.

[0328] Optionally, the processor 910 is further configured to perform at least one of the following:

[0329] Based on the decoding result of the SIB, determine whether to camp in the target cell;

[0330] Based on the decoding result of the SIB, obtain at least one of the following information of the target cell: WUS configuration, idle state measurement configuration, and cell reselection configuration.

[0331] Optionally, the processor 910 is further configured to:

[0332] If the terminal is camped in the target cell, and the second condition is met, it is determined to execute the on-demand SIB request;

[0333] The second condition includes one of the following:

[0334] The total duration starting from the last successful reception of the SIB is greater than or equal to a first duration, which includes the effective duration of the SIB.

[0335] The terminal receives a first signaling message sent by the target cell, which is used to indicate system information updates.

[0336] Optionally, the radio frequency unit 901 is further configured to:

[0337] According to the WUS configuration of the target cell, send WUS to the target cell;

[0338] Receive the second response message sent by the target cell;

[0339] The availability of SIBs for on-demand delivery is determined based on the second response message;

[0340] Detect SIBs sent on demand.

[0341] Optionally, the processor 910 is further configured to: determine, based on the second signaling sent by the target cell, that the SIB to be sent on demand is available;

[0342] The radio frequency unit 901 is also used to detect SIBs that are transmitted on demand.

[0343] Optionally, the duration of the random access procedure performed by the terminal is less than or equal to the second duration; the duration of the random access procedure includes: the duration from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell until it receives the response message;

[0344] The second duration includes:

[0345] Duration determined based on the SSB cycle and / or the arrival time of the first SSB;

[0346] Random access preparation time;

[0347] The duration of waiting for a random access opportunity;

[0348] Duration for sending the random access preamble sequence;

[0349] The duration for waiting to receive a random access response message;

[0350] Duration for receiving random access response messages;

[0351] Duration of decoding random access response messages.

[0352] Optionally, the second duration may further include at least one of the following:

[0353] The duration used for automatic gain control (AGC) adjustment;

[0354] The duration of physical random access preamble retransmission.

[0355] Optionally, the wake-up time window of the terminal sending the WUS is different in time domain from the wake-up time window of the terminal receiving the SIB;

[0356] The wake-up time window is a wake-up time window that appears periodically based on the paging cycle determined by the terminal.

[0357] Optionally, the time from when the terminal receives the response message to when the terminal completes SIB decoding is less than or equal to the third time.

[0358] The third duration is at least one of the following:

[0359] An integer multiple of the system information sending window length;

[0360] An integer multiple of the maximum period for sending system information;

[0361] Integer multiples of the paging cycle.

[0362] Optionally, the radio frequency unit 901 is further configured to:

[0363] Upon receiving the response message or upon receiving the first signaling, the SIB is detected within the fourth time period;

[0364] The fourth duration is agreed upon by the protocol or pre-configured, and the fourth duration is the shortest duration for the target cell to send SIBs.

[0365] Optionally, the number of times the terminal sends WUS in each paging cycle is less than or equal to a first value, which is agreed upon by the protocol or pre-configured.

[0366] In an embodiment of this application, the terminal determines a target cell from the neighboring cells of the current serving cell. Before initiating random access to the target cell, it measures the SSB of the target cell to determine the downlink synchronization timing corresponding to the target cell. Based on the downlink synchronization timing, it sends a WUS to the target cell and then receives system information sent by the target cell. By obtaining the downlink synchronization timing of the target cell, the synchronization accuracy of sending the WUS to the target cell and receiving the response message from the target cell can be guaranteed to be higher, avoiding performance loss in the information transmission and reception process.

[0367] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the system information acquisition method in the method embodiment, and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0368] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiment shown in FIG5. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0369] Specifically, this application embodiment also provides a network-side device, which can be the system information transmitting device shown in FIG. 7. As shown in FIG. 10, the network-side device 1000 includes: an antenna 101, a radio frequency device 102, a baseband device 103, a processor 104, and a memory 105. The antenna 101 is connected to the radio frequency device 102. In the uplink direction, the radio frequency device 102 receives information through the antenna 101 and sends the received information to the baseband device 103 for processing. In the downlink direction, the baseband device 103 processes the information to be transmitted and sends it to the radio frequency device 102. The radio frequency device 102 processes the received information and transmits it through the antenna 101.

[0370] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 103, which includes a baseband processor.

[0371] The baseband device 103 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG10. One of the chips is, for example, a baseband processor, which is connected to the memory 105 via a bus interface to call the program or instructions in the memory 105 to execute the network-side device operation shown in the above method embodiment.

[0372] The network-side device may also include a network interface 106, such as a Common Public Radio Interface (CPRI).

[0373] The radio frequency device 102 is used to: receive a WUS sent by the terminal, wherein the configuration information of the WUS is configured by the current serving cell of the terminal; send a first response message to the terminal; and send an SIB to the terminal.

[0374] Optionally, the radio frequency device 102 is further configured to: send a first signaling to the terminal, the first signaling being used to indicate system information updates.

[0375] Optionally, the radio frequency device 102 is further configured to: send a second signaling to the terminal, the second signaling being used to indicate that on-demand SIBs are available.

[0376] Optionally, the radio frequency device 102 is further configured to: send configuration information for a fourth duration to the terminal, wherein the fourth duration is the shortest duration for sending the SIB.

[0377] In addition, the network-side device 1000 of this application embodiment also includes: a program or instructions stored in the memory 105 and executable on the processor 104. The processor 104 calls the program or instructions in the memory 105 to execute the methods executed by each module shown in FIG7 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0378] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the above-described method for obtaining system information or the various processes of the above-described method for sending system information, and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0379] The processor mentioned above is either the processor in the terminal described in the above embodiments or the processor in the network-side device. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0380] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described system information acquisition method or system information transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0381] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0382] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the above-described method for obtaining system information or to implement various processes of the above-described method for sending system information, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0383] This application also provides a wireless communication system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the system information acquisition method described above, and the network-side device can be used to perform the steps of the system information transmission method described above.

[0384] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0385] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.), and the computer software product includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0386] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A method for acquiring system information, comprising: The terminal determines a target cell, which is a cell among the neighboring cells of the terminal's currently serving cell that meets a first condition; The terminal measures the synchronization signal block (SSB) of the target cell to obtain the downlink synchronization timing corresponding to the target cell; The terminal sends a wake-up signal WUS to the target cell based on the downlink synchronization timing. The terminal receives a System Information Block (SIB) based on the first response message sent by the target cell.

2. The method according to claim 1, wherein, The determination of the target cell includes: In the idle state, measurements are taken of neighboring cells of the current serving cell based on the first cycle to obtain measurement results; the first cycle is determined according to the paging cycle. Based on the measurement results, the neighboring cell that meets the first condition is determined to be the target cell; The first condition includes: The terminal's current serving cell has configured WUS for the neighboring cells; The signal quality of the adjacent cells meets the cell reselection criteria.

3. The method according to claim 1, wherein, The step of measuring the synchronization signal block (SSB) of the target cell to obtain the downlink synchronization timing corresponding to the target cell includes: The SSB of the target cell is measured to obtain the downlink synchronization timing corresponding to at least one SSB of the target cell; Obtain the downlink synchronization timing corresponding to the target cell from the downlink synchronization timing corresponding to the at least one SSB.

4. The method according to claim 3, wherein, The step of obtaining the downlink synchronization timing corresponding to the target cell from the downlink synchronization timing corresponding to the at least one SSB includes: The downlink synchronization timing corresponding to the target cell is determined based on any one or more SSBs from the downlink synchronization timing corresponding to the at least one SSB; or... The downlink synchronization timing corresponding to the target cell is determined based on the target SSB from the downlink synchronization timing corresponding to the at least one SSB, wherein the target SSB is one or more SSBs configured with random access resources in the target cell.

5. The method according to claim 1, further comprising: During the first time period, receiving paging messages from the current serving cell shall be stopped; The start time of the first time period is the time when the terminal determines the target cell; The end time of the first time period is the time it takes for the terminal to complete the necessary system information decoding.

6. The method according to claim 5, wherein, The duration of the first time period includes: the time from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell, to when it receives the random access response message; and the time from when the terminal receives the random access response message to when the terminal completes SIB decoding.

7. The method according to claim 1, further comprising at least one of the following: Based on the decoding result of the SIB, determine whether to camp in the target cell; Based on the decoding result of the SIB, obtain at least one of the following information of the target cell: WUS configuration, idle state measurement configuration, and cell reselection configuration.

8. The method according to claim 1 or 7, further comprising: If the terminal is camped in the target cell, and the second condition is met, it is determined to execute the on-demand SIB request; The second condition includes one of the following: The total duration starting from the last successful reception of the SIB is greater than or equal to a first duration, which includes the effective duration of the SIB. The terminal receives a first signaling message sent by the target cell, which is used to indicate system information updates.

9. The method according to claim 1 or 8, further comprising: According to the WUS configuration of the target cell, send WUS to the target cell; Receive the second response message sent by the target cell; The availability of SIBs for on-demand delivery is determined based on the second response message; Detect SIBs sent on demand.

10. The method according to claim 1 or 8, further comprising: Based on the second signaling sent by the target cell, it is determined that the SIBs to be sent on demand are available; Detect SIBs sent on demand.

11. The method according to claim 1, 6, or 9, wherein, The duration of the random access procedure performed by the terminal is less than or equal to the second duration; the duration of the random access procedure includes: the time from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell until it receives the response message; The second duration includes: Duration determined based on the SSB cycle and / or the arrival time of the first SSB; Random access preparation time; The duration of waiting for a random access opportunity; Duration for sending the random access preamble sequence; The duration for waiting to receive a random access response message; Duration for receiving random access response messages; Duration of decoding random access response messages.

12. The method according to claim 11, wherein, The second duration also includes at least one of the following: The duration used for automatic gain control (AGC) adjustment; The duration of physical random access preamble retransmission.

13. The method according to claim 1, 6, 9, or 11, wherein, The wake-up time window sent by the terminal to the WUS is in a different time domain than the wake-up time window received by the terminal from the SIB. The wake-up time window is a wake-up time window that appears periodically based on the paging cycle determined by the terminal.

14. The method according to claim 1, 6, or 9, wherein, The time from when the terminal receives the response message to when the terminal completes SIB decoding is less than or equal to the third time. The third duration is at least one of the following: An integer multiple of the system information sending window length; An integer multiple of the maximum period for sending system information; Integer multiples of the paging cycle.

15. The method according to claim 1 or 8, further comprising: Upon receiving the response message or upon receiving the first signaling, the SIB is detected within the fourth time period; The fourth duration is agreed upon by the protocol or pre-configured, and the fourth duration is the shortest duration for the target cell to send SIBs.

16. The method according to claim 1 or 9, wherein, The number of times the terminal sends WUS in each paging cycle is less than or equal to a first value, which is agreed upon by the protocol or pre-configured.

17. A method for transmitting system information, comprising: The network-side device receives the WUS sent by the terminal, and the configuration information of the WUS is configured by the terminal's current serving cell; The network-side device sends a first response message to the terminal; The network-side device sends an SIB to the terminal.

18. The method according to claim 17, further comprising: Send a first signaling message to the terminal, the first signaling message being used to indicate system information update.

19. The method of claim 17, further comprising: A second signaling message is sent to the terminal, which indicates that the SIB to be sent on demand is available.

20. The method of claim 17, further comprising: The terminal is sent configuration information for a fourth duration, which is the shortest duration for sending the SIB.

21. A system information acquisition device, comprising: The first processing module is used to determine the target cell, which is a cell among the neighboring cells of the terminal's current serving cell that meets the first condition; The second processing module is used to measure the synchronization signal block (SSB) of the target cell and obtain the downlink synchronization timing corresponding to the target cell. The first transmitting module is used to send a wake-up signal WUS to the target cell based on the downlink synchronization timing. The first receiving module is used to receive a System Information Block (SIB) based on a first response message sent by the target cell.

22. The apparatus according to claim 21, wherein, The first processing module is specifically used for: In the idle state, measurements are taken of neighboring cells of the current serving cell based on the first cycle to obtain measurement results; the first cycle is determined according to the paging cycle. Based on the measurement results, the neighboring cell that meets the first condition is determined to be the target cell; The first condition includes: The terminal's current serving cell has configured WUS for the neighboring cells; The signal quality of the adjacent cells meets the cell reselection criteria.

23. The apparatus according to claim 21, wherein, The second processing module includes: The measurement unit is used to measure the SSB of the target cell and obtain the downlink synchronization timing corresponding to at least one SSB of the target cell. The acquisition unit is used to acquire the downlink synchronization timing corresponding to the target cell from the downlink synchronization timing corresponding to the at least one SSB.

24. The apparatus according to claim 23, wherein, The acquisition unit is specifically used for: The downlink synchronization timing corresponding to the target cell is determined based on any one or more SSBs from the downlink synchronization timing corresponding to the at least one SSB. or, The downlink synchronization timing corresponding to the target cell is determined based on the target SSB from the downlink synchronization timing corresponding to the at least one SSB, wherein the target SSB is one or more SSBs configured with random access resources in the target cell.

25. The apparatus of claim 21, further comprising: The third processing unit is used to stop receiving paging messages sent by the current serving cell during the first time period; The start time of the first time period is the time when the terminal determines the target cell; The end time of the first time period is the time it takes for the terminal to complete the necessary system information decoding.

26. The apparatus according to claim 25, wherein, The duration of the first time period includes: the time from when the terminal measures the SSB of the target cell to obtain the downlink synchronization timing corresponding to the target cell, to when it receives the random access response message; and the time from when the terminal receives the random access response message to when the terminal completes SIB decoding.

27. The apparatus according to claim 21, wherein, The device further includes at least one of the following: The fourth processing module is used to determine the target cell to camp on based on the decoding result of the SIB; The fifth processing module is used to obtain at least one of the following information of the target cell based on the decoding result of the SIB: WUS configuration, idle state measurement configuration, and cell reselection configuration.

28. The apparatus according to claim 21 or 27, further comprising: The sixth processing module is used to determine, if the second condition is met, to execute the on-demand SIB request when the terminal is camped in the target cell. The second condition includes one of the following: The total duration starting from the last successful reception of the SIB is greater than or equal to a first duration, which includes the effective duration of the SIB. The terminal receives a first signaling message sent by the target cell, which is used to indicate system information updates.

29. The apparatus according to claim 21 or 28, further comprising: The second sending module is used to send WUS to the target cell according to the WUS configuration of the target cell; The second receiving module is used to receive the second response message sent by the target cell; The seventh processing module is used to determine, based on the second response message, that the SIB to be sent on demand is available; The third receiving module is used to detect SIBs sent on demand.

30. The apparatus according to claim 21 or 28, further comprising: The eighth processing module is used to determine the availability of SIBs for on-demand transmission based on the second signaling sent by the target cell; The fourth receiving module is used to detect SIBs sent on demand.

31. The apparatus according to claim 21 or 28, further comprising: The fifth receiving module is used to detect the SIB within a fourth time period upon receiving the response message or upon receiving the first signaling. The fourth duration is agreed upon by the protocol or pre-configured, and the fourth duration is the shortest duration for the target cell to send SIBs.

32. A system information transmitting device, comprising: The sixth receiving module is used to receive WUS sent by the terminal, wherein the configuration information of the WUS is configured by the terminal's current serving cell; The third sending module is used to send a first response message to the terminal; The fourth sending module is used to send SIBs to the terminal.

33. The apparatus of claim 32, further comprising: The fifth sending module is used to send a first signaling message to the terminal, which is used to indicate system information updates.

34. The apparatus of claim 32, further comprising: The sixth sending module is used to send a second signaling to the terminal, the second signaling being used to indicate that the SIB to be sent on demand is available.

35. The apparatus of claim 32, further comprising: The seventh sending module is used to send configuration information for a fourth duration to the terminal, wherein the fourth duration is the shortest duration for sending SIB.

36. A terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the system information acquisition method as claimed in any one of claims 1 to 16.

37. A network-side device, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method for transmitting system information as claimed in any one of claims 17 to 20.

38. A readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the method for acquiring system information as described in any one of claims 1 to 16, or the method for transmitting system information as described in any one of claims 17 to 20.

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