Cell reselection method, terminal and network side device

Abstract

The application discloses a cell reselection method, a terminal and a network side device, and belongs to the technical field of communication. The cell reselection method of the application embodiment comprises the following steps: a terminal is camped on a first cell and performs a cell reselection related operation; wherein the cell reselection related operation comprises the following steps: sending first information under the condition that a first condition is met, wherein the first information is used for requesting a cell related to a first frequency to send second information.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a cell reselection method, a terminal, and network-side equipment. Background Technology

[0002] When a disconnected terminal camps on a cell, it needs to measure and evaluate neighboring cells to perform cell reselection. However, some neighboring cells in adjacent frequencies may be in Network Energy Saving (NES) mode. Neighboring cells in NES mode do not periodically send reference signals, making it impossible for the terminal to measure and evaluate these neighboring cells, and thus impossible to perform cell reselection. Summary of the Invention

[0003] This application provides a cell reselection method, a terminal, and a network-side device, which can solve the problem that the terminal cannot measure and evaluate neighboring cells and therefore cannot perform cell reselection.

[0004] In a first aspect, a cell reselection method is provided, comprising: a terminal camping on a first cell and performing cell reselection-related operations; wherein, performing cell reselection-related operations includes: sending first information when a first condition is met, the first information being used to request a cell associated with a first frequency to send second information.

[0005] Secondly, a cell reselection method is provided, comprising: a network-side device sending configuration information, the configuration information being used by a terminal to perform cell reselection-related operations; wherein, performing cell reselection-related operations includes: sending first information when a first condition is met, the first information being used to request a cell of a first frequency to send second information.

[0006] Thirdly, a cell reselection device is provided, applied to a terminal, comprising: a communication module for camping on a first cell and performing cell reselection-related operations; wherein, performing cell reselection-related operations includes: sending first information when a first condition is met, the first information being used to request a cell related to a first frequency to send second information.

[0007] Fourthly, a cell reselection device is provided, comprising: a communication module for sending configuration information, the configuration information being used by a terminal to perform cell reselection-related operations; wherein, performing cell reselection-related operations includes: sending first information when a first condition is met, the first information being used to request a cell of a first frequency to send second information.

[0008] Fifthly, an apparatus for cell reselection 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.

[0009] 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.

[0010] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to camp on a first cell and perform cell reselection-related operations; wherein performing cell reselection-related operations includes: sending first information when a first condition is met, the first information being used to request a cell of a first frequency to send second information.

[0011] 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.

[0012] In a ninth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is used to send configuration information, the configuration information being used by a terminal to perform cell reselection-related operations; wherein performing cell reselection-related operations includes: sending first information when a first condition is met, the first information being used to request a cell of a first frequency to send second information.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0017] In this embodiment, the terminal camps on a first cell and performs cell reselection-related operations. These operations include sending first information when a first condition is met. The first information requests a cell associated with a first frequency to send second information. This embodiment facilitates the terminal's measurement and evaluation of the cell associated with the first frequency based on the second information, thereby achieving successful and efficient cell reselection and contributing to network energy saving. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a wireless communication system according to an embodiment of this application;

[0019] Figure 2 This is a schematic flowchart of a cell reselection method according to an embodiment of this application;

[0020] Figure 3 This is a schematic flowchart of a cell reselection method according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the cell reselection device according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the cell reselection device according to an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of a communication device according to an embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the terminal structure according to an embodiment of this application;

[0025] Figure 8 This is a schematic diagram of the structure of a network-side device according to an embodiment of this application. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments 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 devices (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game consoles, personal computers (PCs), ATMs, or self-service machines, etc. Wearable devices include: smartwatches, smart bracelets, smart earphones, 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), Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform stations). 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.

[0031] Core network equipment, also known as core network nodes, core network functions, or core network elements, includes, but is not limited to, at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), and Binding Support. Functions include BSF, Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), Network Data Analytics Function (NWDAF), and Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform station).It should be noted that the embodiments of this application only use the core network equipment in the NR system as an example for introduction, and do not limit the specific type of core network equipment. If the name of the core network equipment mentioned in the embodiments of this application changes in subsequent protocol versions (such as 6G), it is also within the scope of protection of this application.

[0032] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0033] The cell reselection method provided in this application will be described in detail below with reference to the accompanying drawings, through some embodiments and application scenarios.

[0034] like Figure 2 As shown in the figure, this application embodiment provides a cell reselection method 200, which can be executed by a terminal. In other words, the method can be executed by software or hardware installed on the terminal, and the method includes the following steps.

[0035] S202: The terminal camps on the first cell and performs cell reselection related operations; wherein, performing cell reselection related operations includes: sending first information when a first condition is met, the first information being used to request the cell related to the first frequency to send second information.

[0036] In some embodiments, the first condition includes, for example, that the terminal does not search for or measure a cell at the first frequency, or that among the searched or measured cells, there is no cell that meets the cell reselection criteria or there is no suitable cell.

[0037] For cells associated with the first frequency, the second information can only be sent based on a request from the terminal or a network-side device; that is, the second information is sent on demand. For example, a terminal in the first cell sends a first message requesting the second information to a cell associated with the first frequency, and the cell associated with the first frequency can then send the second information based on the first message. As another example, a network-side device in a cell not associated with the first frequency can request the network-side device in a cell associated with the first frequency to send the second information.

[0038] In one embodiment, the cell associated with the first frequency may be a cell in Network Energy Saving (NES) state or a cell in an energy-saving state, thereby facilitating network energy saving.

[0039] The first information can be used to request the transmission of the second information. The first information may include, for example, an uplink wake-up signaling (WUS), a random access preamble, and a probe reference signal. In one embodiment, the first information includes an uplink WUS. Since the uplink WUS occupies fewer time and frequency resources, it helps reduce signaling overhead.

[0040] The second information can be used by the terminal to measure and evaluate the cell related to the first frequency. This second information may include, for example, a downlink reference signal, a synchronization signal block (SSB), and a system information block (SIB) 1. In one embodiment, the second information includes an SSB and / or SIB 1, which facilitates the terminal's measurement and evaluation of the cell related to the first frequency, and helps the terminal reselect to that cell. For example, the terminal determines the measurement evaluation value of the cell related to the first frequency by measuring the SSB and SIB 1 transmitted by the cell. If the measurement evaluation value of the cell related to the first frequency exceeds a certain threshold (e.g., satisfies the S criterion) and persists for a certain period of time, and the terminal's dwell time in the cell exceeds the specified period of time, the terminal reselects to that cell related to the first frequency.

[0041] In some embodiments, the terminal can send first information to the currently camped first cell, which can interact with cells related to a first frequency via the Xn interface. The Xn interface is a key communication interface in 5G networks, primarily used to connect adjacent base stations (gNB, Next Generation NodeB) to enable direct interaction and cooperation between base stations. Through the Xn interface, the cell related to the first frequency sends second information. In one embodiment, the terminal can send first information to the cell related to the first frequency, causing the cell related to the first frequency to send second information.

[0042] In some embodiments, prior to S202, the terminal may also receive configuration information, which is used by the terminal to send first information, or in other words, the terminal can use the configuration information to send first information. For example, the configuration information may include time-frequency resource configuration for the first information, thereby determining the time-frequency resources for sending the first information; the configuration information may also include applicable frequencies and / or applicable cells, where the applicable frequency may include the first frequency, and the applicable cells may include cells related to the first frequency. By setting applicable frequencies and / or applicable cells for the configuration information, network-side devices can provide different configuration information for different frequencies or different cells, improving configuration flexibility.

[0043] In some embodiments, after the terminal sends the first information, the cell associated with the first frequency sends the second information. The terminal can receive the second information and determine whether the cell associated with the first frequency is a suitable cell based on the second information.

[0044] If the cell associated with the first frequency is determined to be a suitable cell, the terminal can reselect to the cell associated with the first frequency, thereby achieving successful and efficient cell reselection.

[0045] If it is determined that the first frequency-related cell is not a suitable cell, the method further includes: not performing or stopping the measurement or cell reselection criterion determination for the first frequency-related cell, so as to reduce measurement overhead or determination overhead. The cell reselection criterion may include higher priority or lower priority inter-frequency cell reselection criteria, same-frequency and equal-priority inter-frequency cell reselection criteria (or R criteria).

[0046] In some embodiments, when the second information includes SSB and SIB1, the terminal receiving the second information may include one of the following:

[0047] 1) The terminal receives the SSB and SIB1.

[0048] In this example, when the second information includes SSB and SIB1, the network-side device of the first frequency-related cell can simultaneously switch SSB and SIB1 to the transmission state. For example, the network-side device can transmit SSB and SIB1 within a time window, or periodically transmit Cell-Defining SSB (CD-SSB), which may include SSB and SIB1.

[0049] 2) The terminal receives the SSB, and after receiving the SSB, receives the SIB1 at a second time interval.

[0050] Considering that after the terminal receives the SSB, it needs to perform measurements and cell reselection criteria evaluation based on the SSB, and does not need SIB1 immediately, the network-side equipment can send SIB1 after a second time interval after sending the SSB, instead of sending the SSB and SIB1 simultaneously.

[0051] In this example, when the second information includes SSB and SIB1, the network-side device does not need to switch SSB and SIB1 to the transmit state at the same time. For example, the time when SIB1 switches to the transmit state may be later than the time when SSB switches to the transmit state, and the specific time difference depends on the network implementation. In this example, the network-side device can also indicate the length of the second duration to the terminal, thereby reducing the communication overhead caused by the terminal continuously listening to SIB1.

[0052] The cell reselection method provided in this application embodiment involves a terminal camping on a first cell and performing cell reselection-related operations. These operations include sending first information when a first condition is met, whereby the first information requests a cell associated with a first frequency to send second information. This application embodiment facilitates the terminal's measurement and evaluation of the cell associated with the first frequency based on the second information, thereby achieving successful and efficient cell reselection and contributing to network energy conservation.

[0053] In some embodiments, the first condition includes at least one of the following:

[0054] 1) For the first frequency, the terminal has valid configuration information, which is used to send the first information. This configuration information may include, for example, the time and frequency resources for the first information.

[0055] For example, the terminal may have one or more sets of configuration information, each set corresponding to an applicable frequency. If a set of configuration information is applicable to a first frequency, then the terminal may be said to have valid configuration information for that first frequency; conversely, if none of the aforementioned sets of configuration information are applicable to the first frequency, then the terminal may be said to have no valid configuration information for that first frequency.

[0056] 2) The first frequency includes the intra-frequency, and the measurement evaluation value of the first cell meets the intra-frequency measurement initiation criteria.

[0057] The co-frequency is relative to the frequency of the first cell. For example, the first frequency includes some or all of the frequencies that are the same as the frequency of the first cell. If the first frequency has only one frequency, then 2) should be that the first frequency is the co-frequency.

[0058] The measurement evaluation values ​​for the first cell may include the power standard value of the S-criterion, or the quality standard value of the S-criterion. The S-criterion is the cell selection measurement criterion; a cell that satisfies the S-criterion means that the cell satisfies: S... rxlev >0 and S qual >0; where S rxlev It is the standard power value of the S criterion, S qualIt is the quality standard value of the S criterion.

[0059] The measurement evaluation values ​​of the first cell meet the same-frequency measurement initiation criteria, such as: S rxlev <=S intrasearch or S qual <=S nonintrasearch Among them, S rxlev It is the standard power value of the S criterion, S IntraSearchP It is the starting threshold for the same-frequency power measurement standard, S qual It is the quality standard value of the S criterion, S IntraSearchQ This is the threshold for initiating the same-frequency measurement quality standard. It can be understood that in S... rxlev >S intrasearch And S qual >S nonintrasearch In this case, the measurement evaluation value of the first cell does not meet the co-frequency measurement start criterion.

[0060] 3) The first frequency includes inter-frequency frequencies with the same or lower reselection priority, or the first frequency includes inter-RAT frequencies with lower reselection priority, and the measurement evaluation value of the first cell meets the inter-frequency measurement initiation criteria.

[0061] The inter-frequency is relative to the frequency of the first cell. For example, some or all of the frequencies included in the first frequency are different from the frequency of the first cell. Similarly, the inter-RAT frequency is relative to the frequency of the first cell. For example, some or all of the frequencies included in the first frequency belong to a different RAT than the frequency of the first cell. If the first frequency has only one frequency, then 3) should be an inter-frequency with the same or lower reselection priority, or an inter-RAT frequency with a lower reselection priority.

[0062] The same or lower reselection priorities in the various embodiments of this application are relative to the reselection priority of the first cell. In this example, the reselection priority of the different frequency frequencies included in the first frequency is the same as or lower than the reselection priority of the first cell; the reselection priority of the different RAT frequencies included in the first frequency is the same as or lower than the reselection priority of the first cell.

[0063] The measurement and evaluation values ​​of the first cell may include the power standard value of the S criterion, or the quality standard value of the S criterion.

[0064] The measurement evaluation values ​​of the first cell meet the inter-frequency measurement initiation criteria, including, for example: S rxlev <=SnonIntraSearchP or S qual <=S nonIntraSearchQ Among them, S rxlev It is the standard power value of the S criterion, S nonIntraSearchP It is the standard start threshold for heterogeneous frequency power measurement, S qual It is the quality standard value of the S criterion, S nonIntraSearchQ This is the threshold for initiating the quality standard for heterogeneous frequency measurements. It can be understood that in S... rxlev >S nonIntraSearchP And S qual >S nonIntraSearchQ In this case, the measurement evaluation value of the first cell does not meet the inter-frequency measurement initiation criteria.

[0065] 4) The terminal does not search for or measure a cell at the first frequency, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell.

[0066] For example, the terminal performs signal measurements based on a first frequency and obtains a Reference Signal Receiving Power (RSRP) value and a Reference Signal Receiving Quality (RSRQ) value that are both 0 or less than a certain threshold.

[0067] 5) There is no frequency for higher reselection priorities.

[0068] The higher reselection priority in the various embodiments of this application is relative to the reselection priority of the first cell. For example, among the frequencies configured by the network-side equipment for the terminal, there is no frequency with a higher reselection priority than the first cell.

[0069] 6) There are no cells on at least one frequency with a higher reselection priority (such as inter frequency and inter-RAT frequency), or there are no cells on at least one frequency with a higher reselection priority that meet the cell reselection criteria or there are no suitable cells.

[0070] For example, there are no cells on any of the higher priority frequencies configured for the terminal by the network-side equipment, or there are no cells that meet the cell reselection criteria or no suitable cells on any of the higher priority frequencies configured for the terminal by the network-side equipment.

[0071] This embodiment provides a first condition for the terminal to send the first information. In the scenario where the second information of the NES neighbor cell is sent based on demand, the terminal can send the first information when the first condition is met to request the NES neighbor cell to send the second information. This is beneficial for the terminal to measure and evaluate the NES neighbor cell based on the second information, thereby achieving successful and efficient cell reselection.

[0072] In some embodiments, the configuration information satisfies at least one of the following:

[0073] 1) The configuration information is predefined, as agreed upon in the protocol. For example, the first information includes a random access preamble, and this configuration information includes the time-frequency position of the Physical Random Access Channel (PRACH), which is a predefined absolute position.

[0074] 2) The configuration information is obtained by the terminal by receiving signaling from the first cell. For example, the terminal obtains the configuration information by receiving dedicated signaling or broadcast signaling from the first cell.

[0075] In some embodiments, some of the information in the configuration information is predefined, while the other part is obtained by the terminal through receiving signaling from the first cell.

[0076] 3) The configuration information includes applicable frequencies and / or applicable cells. The applicable frequencies include the first frequency, and the applicable cells include cells related to the first frequency. For example, the configuration information may include indication information indicating the applicable frequencies and / or applicable cells; this indication information may be a frequency identifier or a cell identifier (cell ID), etc.

[0077] In some embodiments, the first frequency satisfies at least one of the following:

[0078] 1) The terminal does not search for or measure a cell at the first frequency, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell.

[0079] For example, if the terminal does not find or measure a cell on a certain frequency, or if among the cells found or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell, then the terminal determines that frequency as the first frequency.

[0080] 2) The first frequency is at least one of N frequencies; wherein, the terminal does not search for or measure any cell in the N frequencies, or, among the searched or measured cells, there is no cell that meets the cell reselection criteria or there is no suitable cell, and N is an integer greater than 1.

[0081] For example, if the terminal continuously searches or measures N frequencies and does not find or measure any cells, or if there are no cells among the searched or measured cells that meet the cell reselection criteria or there are no suitable cells, then at least one of these N frequencies will be determined as the first frequency.

[0082] 3) The first frequency is at least one of the search or measurement frequencies; wherein the duration of the terminal performing cell reselection or the duration of the measurement exceeds the first duration, but no cell is searched or measured, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell.

[0083] The first duration can be the length of a time period or the duration of a timer.

[0084] For example, if the duration of cell reselection or measurement performed by the terminal exceeds a first duration but no cell is found or measured, or if among the cells found, there is no cell that meets the cell reselection criteria or no suitable cell, then at least one of the frequencies searched or measured within the first duration is determined as the first frequency.

[0085] It is understood that 2) above determines the first frequency by the number of frequencies continuously searched or measured, and 3) above determines the first frequency by the duration of continuous search or measurement. In some embodiments, 2) and 3) above can also be implemented in combination. For example, if the terminal continuously searches or measures N frequencies, and the duration of cell reselection or measurement exceeds a first duration, but no cell is searched or measured, or if among the searched or measured cells, there is no cell that meets the cell reselection criteria or there is no suitable cell, then at least one of the N frequencies searched or measured within the first duration is determined as the first frequency.

[0086] 4) The terminal has valid configuration information, the frequency to which the configuration information applies includes the first frequency, and the configuration information is used to send the first information.

[0087] For example, if a terminal has valid configuration information for sending the first information at a certain frequency, then that frequency is determined as the first frequency.

[0088] In this embodiment, the terminal can determine a first frequency. In a scenario where the second information is sent based on demand, the terminal can send the first information to request the cells related to the first frequency to send the second information. This is beneficial for the terminal to measure and evaluate the cells related to the first frequency based on the second information, thereby achieving successful and efficient cell reselection.

[0089] The following will explain the "successful" and "efficient" cell reselection described above: 1) Since the terminal can measure and evaluate cells related to the first frequency based on the second information, if the measurement and evaluation value of the cell related to the first frequency exceeds a certain threshold (such as satisfying the S criterion) and persists for a certain period of time, and the terminal stays in the first cell for a certain period of time, the terminal will reselect to the cell related to the first frequency, thus achieving successful cell reselection; 2) There are cells in the neighboring cells of the first cell that send the second information on demand. If the terminal does not send the first information but waits for randomly sent second information, such as waiting for other terminals to trigger the sending of the second information, or waiting for network-side devices of cells not related to the first frequency to trigger the sending of the second information, this will greatly affect the efficiency of cell reselection. In this embodiment, the terminal triggers the sending of the second information by sending the first information, which is beneficial to obtain the second information in a timely manner, thus achieving efficient cell reselection.

[0090] In some embodiments, the first cell or the first frequency-related cell is a cell in a first state, the first state including at least one of the following:

[0091] 1) The need to send the second information based on the terminal request is beneficial for network energy saving.

[0092] 2) Listen for requests sent by the terminal regarding the second information.

[0093] 3) No second message was sent.

[0094] 4) The second information was not sent within the third duration or the second information was not sent temporarily. The third duration is a limited duration, such as 320ms.

[0095] The third duration can be the duration of a time period, the duration of a timer, or the length of a time window.

[0096] 5) Send the second information within the fourth duration or send the second information temporarily, wherein the fourth duration is a limited duration, such as 320ms.

[0097] The fourth duration can be the duration of a time period, the duration of a timer, or the length of a time window.

[0098] 6) Energy-saving mode, such as NES mode.

[0099] In this embodiment, the first cell or the cell associated with the first frequency can be in a first state and can send second information as needed, which is beneficial for achieving network energy saving.

[0100] In some embodiments, the first cell is a cell in a second state, the second state including at least one of the following:

[0101] 1) It is not necessary to send the second information based on the terminal request.

[0102] 2) Do not listen to requests for the second information sent by the terminal.

[0103] 3) Send the second information periodically.

[0104] 4) Send the second information within the fifth duration or send the second information temporarily, wherein the fifth duration is a finite duration or an infinite duration, such as 320ms.

[0105] In the case of a finite duration, the fifth duration can be the duration of a time period, the duration of a timer, or the length of a time window.

[0106] 5) Non-energy-saving state.

[0107] In this embodiment, the first cell can be in the second state, which is beneficial for timely communication with the terminal and reduces communication latency.

[0108] In some embodiments, the cell reselection related operations may further include at least one of the following:

[0109] 1) For inter-frequency or inter-RAT frequency with higher reselection priority, the terminal measures the inter-frequency or inter-RAT frequency according to the measurement requirements of the higher priority inter-frequency or inter-RAT cell.

[0110] 2) For co-frequency, if the measurement evaluation value of the first cell meets the co-frequency measurement initiation criterion, the terminal measures the co-frequency. This co-frequency measurement initiation criterion can be found in other embodiments.

[0111] 3) For inter-frequency frequencies with the same or lower reselection priority, or inter-RAT frequencies with lower reselection priority, the terminal measures the inter-frequency frequency or inter-RAT frequency if the measurement evaluation value of the first cell meets the inter-frequency measurement initiation criterion. This inter-frequency measurement initiation criterion can be found in other embodiments.

[0112] Where the above embodiments or implementation methods do not contradict each other, the above embodiments or implementation methods may be used in combination.

[0113] The above combination Figure 2 The cell reselection method according to embodiments of this application is described in detail below. The following will combine... Figure 3 A cell reselection method according to another embodiment of this application is described in detail. It will be understood that the interaction between the network-side device and the terminal, as described from the perspective of the network-side device, is... Figure 2 The terminal-side descriptions in the methods shown are the same or corresponding; to avoid repetition, relevant descriptions are omitted as appropriate.

[0114] Figure 3 This is a schematic diagram illustrating the implementation process of the cell reselection method according to an embodiment of this application, which can be applied to network-side devices. For example... Figure 3 As shown, the method 300 includes the following steps.

[0115] S302: The network-side device sends configuration information, which is used by the terminal to perform cell reselection-related operations; wherein, the cell reselection-related operations include: sending first information when a first condition is met, the first information being used to request a cell related to a first frequency to send second information.

[0116] The configuration information is used by the terminal to send first information. For example, the configuration information includes the time and frequency resource configuration of the first information. The configuration information may also include the applicable frequency and / or the applicable cell. The applicable frequency of the configuration information may include the first frequency, and the applicable cell may include the cell related to the first frequency.

[0117] In some embodiments, the configuration information includes applicable frequencies and / or applicable cells.

[0118] The embodiments of this application are beneficial for the terminal to measure and evaluate the cells related to the first frequency based on the second information, thereby achieving successful and efficient cell reselection, and at the same time, it is beneficial to achieve network energy saving.

[0119] In some embodiments, the network-side device is the network-side device of a first cell. The network-side device can also receive first information sent by the terminal and request the network-side device of the cell related to the first frequency to send second information based on the first information.

[0120] In some embodiments, the network-side device is the network-side device of a first frequency-related cell. The network-side device may also receive first information sent by the terminal and send second information based on the first information; or, the network-side device may also receive request information sent by the network-side device of the first cell and send second information based on the request information.

[0121] The cell reselection method provided in this application can be executed by a cell reselection device. This application uses the example of a cell reselection device executing the cell reselection method to illustrate the cell reselection device provided in this application.

[0122] This application provides a cell reselection device. As an example, the cell reselection device can be a communication device or a component within a communication device, such as a chip. The communication device can be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal can be, but is not limited to, the type of terminal 11 listed above, and the network-side device can be, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0123] The cell reselection 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.

[0124] For details, see Figure 4 When the cell reselection device is a terminal or a component in a terminal, the cell reselection device 400 includes the following modules.

[0125] The communication module 402 is used to camp on a first cell and perform cell reselection-related operations; wherein, the cell reselection-related operations include: sending first information when a first condition is met, the first information being used to request a cell related to a first frequency to send second information.

[0126] The embodiments of this application are beneficial for the terminal to measure and evaluate the cells related to the first frequency based on the second information, thereby achieving successful and efficient cell reselection, and at the same time, it is beneficial to achieve network energy saving.

[0127] In some embodiments, the first condition includes at least one of the following:

[0128] 1) For the first frequency, the terminal has valid configuration information, which is used to send the first information.

[0129] 2) The first frequency includes the same frequency, and the measurement evaluation value of the first cell meets the same frequency measurement start criterion.

[0130] 3) The first frequency includes inter-frequency frequencies with the same or lower reselection priority, or the first frequency includes inter-RAT frequencies with lower reselection priority, and the measurement evaluation value of the first cell meets the inter-frequency measurement initiation criteria.

[0131] 4) The terminal does not search for or measure a cell at the first frequency, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell.

[0132] 5) There is no frequency for higher reselection priorities.

[0133] 6) There are no cells on at least one frequency with a higher reselection priority, or there are no cells on at least one frequency with a higher reselection priority that meet the cell reselection criteria or there are no suitable cells.

[0134] In some embodiments, the first frequency satisfies at least one of the following:

[0135] 1) The terminal does not search for or measure a cell at the first frequency, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell.

[0136] 2) The first frequency is at least one of N frequencies; wherein, the terminal does not search for or measure any cell in the N frequencies, or, among the searched or measured cells, there is no cell that meets the cell reselection criteria or there is no suitable cell, and N is an integer greater than 1.

[0137] 3) The first frequency is at least one of the search or measurement frequencies; wherein the duration of the terminal performing cell reselection or the duration of the measurement exceeds the first duration, but no cell is searched or measured, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell.

[0138] 4) The terminal has valid configuration information, the frequency to which the configuration information applies includes the first frequency, and the configuration information is used to send the first information.

[0139] In some embodiments, the communication module 402 is further configured to receive the second information and determine whether the first frequency-related cell is a suitable cell based on the second information.

[0140] In some embodiments, if it is determined that the first frequency-related cell is not a suitable cell, the communication module 402 is further configured to not perform or stop the measurement or cell reselection criterion determination for the first frequency-related cell.

[0141] In some embodiments, the second information includes SSB and SIB1, and the communication module 402 is configured to: receive the SSB and SIB1; or, receive the SSB and receive the SIB1 at a time interval of a second duration after receiving the SSB.

[0142] See Figure 5 When the cell reselection device is a network-side device or a component of a network-side device, the cell reselection device 500 includes the following modules.

[0143] The communication module 502 is used to send configuration information, which is used by the terminal to perform cell reselection related operations; wherein, the cell reselection related operations include: sending first information when a first condition is met, the first information being used to request a cell related to a first frequency to send second information.

[0144] The embodiments of this application are beneficial for the terminal to measure and evaluate the cells related to the first frequency based on the second information, thereby achieving successful and efficient cell reselection, and at the same time, it is beneficial to achieve network energy saving.

[0145] In some embodiments, the configuration information includes applicable frequencies and / or applicable cells.

[0146] The cell reselection device provided in this application embodiment can achieve... Figures 2 to 3 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0147] like Figure 6As shown in the illustration, this application also provides a communication device 600, including a processor 601 and a memory 602. The memory 602 stores programs or instructions that can run on the processor 601. For example, when the communication device 600 is a terminal, the program or instructions executed by the processor 601 implement the various steps of the above-described cell reselection method embodiment and achieve the same technical effect. When the communication device 600 is a network-side device, the program or instructions executed by the processor 601 implement the various steps of the above-described cell reselection method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0148] This application embodiment 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, for example... Figure 2 The steps in the method embodiment shown are illustrated. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. The terminal can be... Figure 4 The cell reselection device shown. Specifically, Figure 7 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0149] The terminal 700 includes, but is not limited to, at least some of the following components: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, and processor 710.

[0150] Those skilled in the art will understand that the terminal 700 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 710 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 7 The terminal structure shown 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.

[0151] It should be understood that, in this embodiment, the input unit 704 may include a graphics processor 7041 and a microphone 7042. The graphics processor 7041 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 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include a touch detection device and a touch controller. Other input devices 7072 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.

[0152] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 701 can transmit it to the processor 710 for processing; in addition, the radio frequency unit 701 can send uplink data to the network-side device. Typically, the radio frequency unit 701 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0153] The memory 709 can be used to store software programs or instructions, as well as various data. The memory 709 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 709 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 709 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0154] Processor 710 may include one or more processing units; optionally, processor 710 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 710.

[0155] The radio frequency unit 701 is used to camp on the first cell and perform cell reselection related operations; wherein, the cell reselection related operations include: sending first information when a first condition is met, the first information being used to request the cell related to the first frequency to send second information.

[0156] The embodiments of this application are beneficial for the terminal to measure and evaluate the cells related to the first frequency based on the second information, thereby achieving successful and efficient cell reselection, and at the same time, it is beneficial to achieve network energy saving.

[0157] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the cell reselection method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be described again here.

[0158] This application embodiment also provides a network-side device, 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, for example... Figure 3 The steps of the method embodiment shown are illustrated. 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.

[0159] Specifically, embodiments of this application also provide a network-side device, which can be... Figure 5 The cell reselection device shown. Figure 8 As shown, the network-side device 800 includes: an antenna 81, a radio frequency (RF) device 82, a baseband device 83, a processor 84, and a memory 85. The antenna 81 is connected to the RF device 82. In the uplink direction, the RF device 82 receives information through the antenna 81 and transmits the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be transmitted and sends it to the RF device 82. The RF device 82 processes the received information and transmits it through the antenna 81.

[0160] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 83, which includes a baseband processor.

[0161] Baseband device 83 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 8 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 85 via a bus interface to call the program or instructions in the memory 85 to execute the network-side device operations shown in the above method embodiments.

[0162] The network-side device may also include a network interface 86, such as a Common Public Radio Interface (CPRI).

[0163] The radio frequency device 82 is used to send configuration information, which is used by the terminal to perform cell reselection related operations. The cell reselection related operations include sending first information when a first condition is met, whereby the first information is used to request a cell related to a first frequency to send second information.

[0164] Furthermore, the network-side device 800 in this embodiment of the application also includes: a program or instructions stored in a memory 85 and executable on a processor 84, wherein the processor 84 calls the program or instructions in the memory 85 to execute. Figure 5 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0165] 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 various processes of the above-described cell reselection method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0166] 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.

[0167] 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 cell reselection method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0168] 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.

[0169] 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 various processes of the above-described cell reselection method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0170] This application also provides a cell reselection system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the cell reselection method described above, and the network-side device can be used to perform the steps of the cell reselection method described above.

[0171] 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.

[0172] 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.

[0173] 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 cell reselection method, characterized in that, include: The terminal resides in the first cell and performs cell reselection-related operations; The cell reselection related operations include: sending first information when a first condition is met, wherein the first information is used to request the cell related to the first frequency to send second information.

2. The method according to claim 1, characterized in that, The first condition includes at least one of the following: For the first frequency, the terminal has valid configuration information, which is used to send the first information; The first frequency includes the same frequency, and the measurement evaluation value of the first cell meets the same frequency measurement initiation criteria; The first frequency includes inter-frequency frequencies with the same or lower reselection priority, or the first frequency includes inter-radio access technology (RAT) frequencies with lower reselection priority, and the measurement evaluation value of the first cell meets the inter-frequency measurement initiation criteria. The terminal does not search for or measure a cell at the first frequency, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell. There is no frequency for higher reselection priorities; There are no cells on at least one higher reselection priority frequency, or there are no cells on at least one higher reselection priority frequency that meet the cell reselection criteria or there are no suitable cells.

3. The method according to claim 2, characterized in that, The configuration information satisfies at least one of the following: The configuration information is predefined; The configuration information is obtained by the terminal by receiving signaling from the first cell; The configuration information includes the applicable frequency and / or the applicable cell.

4. The method according to any one of claims 1 to 3, characterized in that, The first frequency satisfies at least one of the following: The terminal does not search for or measure a cell at the first frequency, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell. The first frequency is at least one of N frequencies; wherein, the terminal does not search for or measure any cell in the N frequencies, or, among the searched or measured cells, there is no cell that meets the cell reselection criteria or there is no suitable cell, and N is an integer greater than 1; The first frequency is at least one of the search or measurement frequencies; wherein, the duration of the terminal performing cell reselection or the duration of the measurement exceeds the first duration, but no cell is searched or measured, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell; The terminal has valid configuration information, the frequency to which the configuration information applies includes the first frequency, and the configuration information is used to send the first information.

5. The method according to any one of claims 1 to 4, characterized in that, After sending the first information when the first condition is met, the method further includes: The terminal receives the second information; Based on the second information, determine whether the first frequency-related cell is a suitable cell.

6. The method according to claim 5, characterized in that, If it is determined that the first frequency-related cell is not a suitable cell, the method further includes: Do not perform or stop the measurement or cell reselection criterion determination for the cell associated with the first frequency.

7. The method according to claim 5, characterized in that, The second information includes a synchronization signal block (SSB) and a system information block (SIB1). The terminal receives the second information including: The terminal receives the SSB and SIB1; or, The terminal receives the SSB, and after receiving the SSB, it receives the SIB1 at a second time interval.

8. The method according to any one of claims 1 to 7, characterized in that, The first cell or the cell associated with the first frequency is a cell in a first state, which includes at least one of the following: The second information needs to be sent based on the terminal request. Listen for requests sent by the terminal regarding the second information; No second message was sent; The second information was not sent within the third time period or was not sent temporarily, where the third time period is a limited duration; The second information is sent within a fourth time period or temporarily, wherein the fourth time period is a limited time period; Energy saving status.

9. The method according to any one of claims 1 to 7, characterized in that, The first cell is a cell in a second state, which includes at least one of the following: It is not necessary to send the second information based on the terminal request; Do not listen to requests sent by the terminal regarding the second information; The second information is sent periodically; The second information is sent within a fifth duration or temporarily, wherein the fifth duration is a finite duration or an infinite duration; Non-energy-saving state.

10. The method according to any one of claims 1 to 9, characterized in that, The first information includes an uplink wake-up signal; and / or, The second message includes SSB and / or SIB1.

11. A cell reselection method, characterized in that, include: The network-side device sends configuration information, which is used by the terminal to perform cell reselection-related operations. The cell reselection related operations include: sending first information when a first condition is met, wherein the first information is used to request the cell related to the first frequency to send second information.

12. The method according to claim 11, characterized in that, The configuration information includes the applicable frequency and / or the applicable cell.

13. A cell reselection device, applied to a terminal, characterized in that, include: The communication module is used to camp on the first cell and perform cell reselection-related operations; The cell reselection related operations include: sending first information when a first condition is met, wherein the first information is used to request the cell related to the first frequency to send second information.

14. The apparatus according to claim 13, characterized in that, The first condition includes at least one of the following: For the first frequency, the terminal has valid configuration information, which is used to send the first information; The first frequency includes the same frequency, and the measurement evaluation value of the first cell meets the same frequency measurement initiation criteria; The first frequency includes inter-frequency frequencies with the same or lower reselection priority, or the first frequency includes inter-radio access technology (RAT) frequencies with lower reselection priority, and the measurement evaluation value of the first cell meets the inter-frequency measurement initiation criteria. The terminal does not search for or measure a cell at the first frequency, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell. There is no frequency for higher reselection priorities; There are no cells on at least one higher reselection priority frequency, or there are no cells on at least one higher reselection priority frequency that meet the cell reselection criteria or there are no suitable cells.

15. The apparatus according to claim 13 or 14, characterized in that, The first frequency satisfies at least one of the following: The terminal does not search for or measure a cell at the first frequency, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell. The first frequency is at least one of N frequencies; wherein, the terminal does not search for or measure any cell in the N frequencies, or, among the searched or measured cells, there is no cell that meets the cell reselection criteria or there is no suitable cell, and N is an integer greater than 1; The first frequency is at least one of the search or measurement frequencies; wherein, the duration of the terminal performing cell reselection or the duration of the measurement exceeds the first duration, but no cell is searched or measured, or, among the cells searched or measured, there is no cell that meets the cell reselection criteria or there is no suitable cell; The terminal has valid configuration information, the frequency to which the configuration information applies includes the first frequency, and the configuration information is used to send the first information.

16. The apparatus according to any one of claims 13 to 15, characterized in that, The communication module is further configured to receive the second information and determine, based on the second information, whether the first frequency-related cell is a suitable cell.

17. The apparatus according to claim 16, characterized in that, If it is determined that the first frequency-related cell is not a suitable cell, the communication module is further configured to not perform or stop the measurement or cell reselection criterion determination for the first frequency-related cell.

18. The apparatus according to claim 16, characterized in that, The second information includes SSB and SIB1, and the communication module is used for: Receive the SSB and SIB1; or, Receive the SSB, and receive the SIB1 at a second time interval after receiving the SSB.

19. A cell reselection device, characterized in that, include: The communication module is used to send configuration information, which is used by the terminal to perform cell reselection-related operations. The cell reselection related operations include: sending first information when a first condition is met, wherein the first information is used to request the cell related to the first frequency to send second information.

20. The apparatus according to claim 19, characterized in that, The configuration information includes the applicable frequency and / or the applicable cell.

21. A terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the method as described in any one of claims 1 to 10.

22. A network-side device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the method as described in claim 11 or 12.

23. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the method as claimed in any one of claims 1 to 10, or the steps of the method as claimed in claim 11 or 12.

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