Cell selection or reselection method, apparatus, related device, product, and storage medium

Abstract

The present invention provides a cell selection or reselection method, an apparatus, a related device, a product, and a storage medium. The method comprises: searching for a first non-energy-saving cell in a first cell set, wherein the first non-energy-saving cell is the strongest non-energy-saving cell in the first cell set, a system information block 1 (SIB1) of the non-energy-saving cell is a broadcast message, and the frequency-domain position of each synchronization signal / physical broadcast channel block (SSB) associated with each cell in the first cell set is the same; or reselecting to a second non-energy-saving cell in a second cell set, wherein the second non-energy-saving cell is the highest-ranked non-energy-saving cell, which satisfies a reselection condition, in the second cell set, an SIB1 of the non-energy-saving cell is a broadcast message, the frequency-domain positions of SSBs associated with cells in the second cell set are the same, and / or the reselection priority and / or radio access type (RAT) of each cell in the second cell set are / is the same.

Description

Cell selection or reselection methods, devices, related equipment, products and storage media

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202410703906.3, filed on May 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of core networks, and more particularly to a cell selection or reselection method, apparatus, related equipment, products and storage media. Background Technology

[0004] In on-demand System Information Block Type 1 (SIB1) scenarios, network devices generally do not send SIB1. Correspondingly, terminals generally cannot directly obtain SIB1. However, in cell selection or cell reselection processes, verifying whether a cell is a suitable cell based on SIB1 is an essential step. Summary of the Invention

[0005] This disclosure provides a cell selection or reselection method, apparatus, related equipment, products, and storage medium.

[0006] The technical solution of this disclosure embodiment is implemented as follows:

[0007] This disclosure provides a cell selection or reselection method, including:

[0008] Receive configuration information;

[0009] Based on the configuration information, it is determined whether the first cell is a suitable cell; the SIB1 of the first cell is non-broadcast information.

[0010] In the above scheme, the configuration information includes at least one of the following:

[0011] Configuration of the first Physical Random Access Channel (PRACH) signal; the first PRACH signal is used to request SIB1 of the first cell;

[0012] Information parameters of the first community.

[0013] In the above scheme, the configuration of the first PRACH signal includes at least one of the following:

[0014] The signage for the first residential area;

[0015] Resource configuration of the first PRACH signal;

[0016] The frame structure configuration of the first cell;

[0017] The Synchronization Signal Block (SSB) configuration of the first cell;

[0018] The channel access mode of the first cell;

[0019] The first cell's control resource set (CORESET) and search space configuration;

[0020] The initial downlink / uplink bandwidth (BWP) and / or carrier configuration of the first cell.

[0021] In the above scheme, the information parameters include at least one of the following:

[0022] Public Land Mobile Network (PLMN) information of the first cell;

[0023] Bandwidth information of the first cell;

[0024] The S-criterion parameters of the first cell.

[0025] The method in the above scheme further includes:

[0026] The system receives a first synchronization signal and information block (Synchronization Signal / PBCH Block, SSB), which is associated with the first cell. When the Physical Cell Identifier (PCI) in the first SSB matches the cell identifier in the configuration information, the system determines that the SIB1 of the first cell is the on-demand trigger information.

[0027] This disclosure also provides a cell selection or reselection method, including:

[0028] The search proceeds to the first non-energy-efficient cell in the first cell set, which is the strongest non-energy-efficient cell in the first cell set. The System Information Block Type 1 (SIB1) of the non-energy-efficient cell is a broadcast message. The frequency domain positions of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set are the same. Alternatively, the cell is reselected to the second non-energy-efficient cell in the second cell set. The second non-energy-efficient cell is the highest-ranked non-energy-efficient cell in the second cell set that meets the reselection criteria. The SIB1 of the non-energy-efficient cell is a broadcast message. The frequency domain positions of the SSBs associated with each cell in the second cell set are the same, and / or the reselection priority and / or Radio Access Type (RAT) of each cell in the second cell set are the same.

[0029] The method in the above scheme further includes:

[0030] The first non-energy-efficient cell was determined to be a suitable cell.

[0031] Select the first non-energy-saving cell.

[0032] In the above scheme, the method includes:

[0033] Receive N first SSBs; the N first SSBs correspond one-to-one with N first cells, where N is a positive integer, and the N first cells belong to either the first cell set or the second cell set;

[0034] The N first cells are determined to be energy-saving cells based on the N first SSBs, and the SIB1 of the energy-saving cells is non-broadcast information.

[0035] In the above scheme, the channel quality of M of the N first cells is stronger than that of the first non-energy-saving cell, or the channel quality of M of the N first cells is stronger than that of the second non-energy-saving cell; M is a positive integer, and M is less than or equal to N.

[0036] In the above scheme, determining the N first cells as energy-saving cells based on the N first SSBs includes:

[0037] The Physical Cell Identifier (PCI) of the N first cells is determined based on the N first SSBs;

[0038] Receive configuration information;

[0039] When the configuration information includes the Physical Cell Identifier (PCI) in the first SSB, the N first cells are determined to be energy-saving cells.

[0040] In the above scheme, determining the N first cells as energy-saving cells based on the N first SSBs includes:

[0041] The N first cells are determined to be energy-saving cells based on a first characteristic among the N first SSBs; wherein the first characteristic includes one or more of the following:

[0042] The frequency domain location of the first SSB;

[0043] The first field exists in the Master Information Block (MIB) of the first SSB;

[0044] The offset indication information Kssb of the first SSB is the first value;

[0045] The control resource indication information PDCCH-configSIB1 of the first SSB is the second value;

[0046] The first SSB's physical downlink control channel (PBCH) payload includes a first bias;

[0047] The subcarrier position of the PBCH demodulation reference signal (DM-RS) of the first SSB includes a second bias;

[0048] The frequency domain offset between the frequency domain position of the first SSB and the first synchronization frequency point is the third offset.

[0049] The method in the above scheme further includes:

[0050] Based on preset storage information, the second cell is determined to be an energy-saving cell, and the SIB1 of the energy-saving cell is non-broadcast information.

[0051] The method in the above scheme further includes:

[0052] Determine that the second cell is not a suitable cell, or do not select the second cell.

[0053] In the above scheme, the stored information does not include the configuration information of the first PRACH signal, which is used to request SIB1 of the second cell.

[0054] This disclosure also provides a cell reselection method, including:

[0055] Receive configuration information;

[0056] When there is a non-energy-saving cell in the third cell set that meets the reselection conditions, the cell is reselected to the third non-energy-saving cell. The third non-energy-saving cell is the non-energy-saving cell that meets the reselection conditions and has the highest ranking. The SIB1 of the non-energy-saving cell is a broadcast message.

[0057] When there are no non-energy-saving cells that meet the reselection conditions in all cells of the third cell set, and there are energy-saving cells that meet the reselection conditions, the SIB1 of the first energy-saving cell is requested according to the configuration information; the first energy-saving cell is the energy-saving cell in the third cell set that meets the reselection conditions and has the highest ranking, and the SIB1 of the energy-saving cell or the first energy-saving cell is non-broadcast information.

[0058] The method in the above scheme further includes:

[0059] The first energy-saving cell was determined to be a suitable cell;

[0060] Reselect to the first energy-saving community.

[0061] In the above scheme, the third cell set includes at least one of the following:

[0062] The frequency domain positions of the SSBs associated with each cell in the third cell set are the same.

[0063] The subcarrier spacing of the SSBs associated with each cell in the third cell set is the same;

[0064] The reselection priority of each cell in the third cell set is the same;

[0065] The RATs of all cells in the third cell set are the same;

[0066] The third cell set consists of all cells that can be used for cell reselection.

[0067] In the above scheme, the configuration information includes the configuration of the first physical random access channel (PRACH) signal; the first PRACH signal is used to request the SIB1 of the first energy-saving cell.

[0068] In the above scheme, the configuration of the first PRACH signal includes at least one of the following:

[0069] The signage for the first energy-saving community;

[0070] Resource configuration of the first PRACH signal;

[0071] The frame structure configuration of the first energy-saving cell;

[0072] The synchronization signal block (SSB) configuration of the first energy-saving cell;

[0073] The channel access mode of the first energy-saving cell;

[0074] The configuration of the first energy-saving cell's control resource set (CORESET) and search space; the initial downlink / uplink partial bandwidth (BWP) and / or carrier configuration of the first energy-saving cell.

[0075] This disclosure also provides a cell selection or reselection method, including:

[0076] Send configuration information;

[0077] The configuration information is used to determine whether the first cell is a suitable cell; the RMSI of the first cell is non-broadcast information.

[0078] In the above scheme, the configuration information includes at least one of the following:

[0079] Configuration of the first physical random access channel (PRACH) signal; the first PRACH signal is used to trigger SIB1 of the first cell;

[0080] Information parameters of the first community.

[0081] In the above scheme, the configuration of the first PRACH signal includes at least one of the following:

[0082] The signage for the first residential area;

[0083] Resource configuration of the first PRACH signal;

[0084] The frame structure configuration of the first cell;

[0085] Synchronization Signal Block (SSB) configuration of the first cell;

[0086] The channel access mode of the first cell;

[0087] The configuration of the first cell's control resource set (CORESET) and search space;

[0088] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first cell.

[0089] In the above scheme, the information parameters include at least one of the following:

[0090] Public Land Mobile Network (PLMN) information for the first cell;

[0091] Bandwidth information of the first cell;

[0092] The S-criterion parameters of the first cell.

[0093] The method in the above scheme further includes:

[0094] Send a first synchronization signal and an information block SSB. The first SSB is associated with the first cell. The first SSB is used to determine that the SIB1 of the first cell is on-demand trigger information when the physical cell identifier (PCI) in the first SSB is consistent with the cell identifier in the configuration information.

[0095] This disclosure also provides a cell selection or reselection method, including:

[0096] Send N first SSBs; the N first SSBs correspond one-to-one with N first cells, where N is a positive integer; the N first cells are energy-saving cells, and the SIB1 of the energy-saving cells is non-broadcast information.

[0097] This disclosure also provides a cell reselection method, including:

[0098] Send configuration information, which includes the configuration of the first physical random access channel (PRACH) signal; the first PRACH signal is used to request the SIB1 of the first energy-saving cell; the SIB1 of the first energy-saving cell is non-broadcast information.

[0099] In the above scheme, the configuration of the first PRACH signal includes at least one of the following:

[0100] The signage for the first energy-saving community;

[0101] Resource configuration of the first PRACH signal;

[0102] The frame structure configuration of the first energy-saving cell;

[0103] The synchronization signal block (SSB) configuration of the first energy-saving cell;

[0104] The channel access mode of the first energy-saving cell;

[0105] The configuration of the first energy-saving community control resource set (CORESET) and search space;

[0106] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first energy-saving cell.

[0107] This disclosure also provides a cell selection or reselection device, including:

[0108] The receiving unit is used to receive configuration information;

[0109] The judgment unit is used to determine whether the first cell is a suitable cell based on the configuration information; the SIB1 of the first cell is non-broadcast information.

[0110] This disclosure also provides a cell selection or reselection device, including:

[0111] The search unit is used to search for the first non-energy-efficient cell in the first cell set. The first non-energy-efficient cell is the strongest non-energy-efficient cell in the first cell set, and the SIB1 of the non-energy-efficient cell is a broadcast message. The frequency domain positions of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set are the same; or...

[0112] A reselection unit is used to reselect to the second non-energy-efficient cell in the second cell set; the second non-energy-efficient cell is the non-energy-efficient cell in the second cell set that meets the reselection conditions and has the highest ranking, and the SIB1 of the non-energy-efficient cell is a broadcast message; the frequency domain positions of the SSBs associated with each cell in the second cell set are the same, and / or the reselection priority and / or Radio Access Type (RAT) of each cell in the second cell set are the same.

[0113] This disclosure also provides a cell reselection device, including:

[0114] The receiving unit is used to receive configuration information;

[0115] The reselection unit is used to reselect to the third non-energy-saving cell when there is a non-energy-saving cell in the third cell set that meets the reselection conditions. The third non-energy-saving cell is the non-energy-saving cell that meets the reselection conditions and has the highest ranking. The SIB1 of the non-energy-saving cell is a broadcast message.

[0116] The request unit is configured to request the SIB1 of the first energy-saving cell according to the configuration information when there are no non-energy-saving cells that meet the reselection conditions among all cells in the third cell set, and there are energy-saving cells that meet the reselection conditions; the first energy-saving cell is the energy-saving cell in the third cell set that meets the reselection conditions and has the highest ranking, and the SIB1 of the first energy-saving cell is non-broadcast information.

[0117] This disclosure also provides a cell selection or reselection device, including:

[0118] The transmitting unit is used to transmit configuration information; the configuration information is used to determine whether the first cell is a suitable cell; the SIB1 of the first cell is non-broadcast information.

[0119] This disclosure also provides a cell selection or reselection device, including:

[0120] The transmitting unit is used to transmit N first SSBs; the N first SSBs correspond one-to-one with N first cells, where N is a positive integer; the N first cells are energy-saving cells, and the SIB1 of the energy-saving cells is non-broadcast information.

[0121] This disclosure also provides a cell reselection device, including:

[0122] A sending unit is used to send configuration information; the configuration information is used to request the SIB1 of the first energy-saving cell; the first energy-saving cell is the energy-saving cell in the third cell set that meets the reselection conditions and has the highest ranking, and the SIB1 of the first energy-saving cell is non-broadcast information;

[0123] The third cell set includes at least one of the following:

[0124] The frequency domain positions of the SSBs associated with each cell in the third cell set are the same.

[0125] The subcarrier spacing of the SSBs associated with each cell in the third cell set is the same;

[0126] The reselection priority of each cell in the third cell set is the same;

[0127] The RATs of all cells in the third cell set are the same;

[0128] The third cell set consists of all cells that can be used for cell reselection.

[0129] This disclosure also provides a cell selection or reselection device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of any of the above methods.

[0130] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of any of the above methods.

[0131] This disclosure also provides a storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of any of the above methods.

[0132] The cell selection or reselection method, apparatus, related equipment, products, and storage medium provided in this disclosure include: searching for a first non-energy-efficient cell in a first cell set, wherein the first non-energy-efficient cell is the strongest non-energy-efficient cell in the first cell set, and the SIB1 of the non-energy-efficient cell is a broadcast message; the frequency domain positions of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set are the same; or, reselecting to a second non-energy-efficient cell in a second cell set; wherein the second non-energy-efficient cell is the highest-ranked non-energy-efficient cell in the second cell set that meets the reselection conditions, and the SIB1 of the non-energy-efficient cell is a broadcast message; the frequency domain positions of the SSBs associated with each cell in the second cell set are the same, and / or the reselection priority and / or Radio Access Type (RAT) of each cell in the second cell set are the same. In embodiments of this disclosure, the strongest non-energy-efficient cell in the first cell set is selected, and the SIB1 of the non-energy-efficient cell is a broadcast message; the frequency domain positions of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set are the same; or, the cell is reselected to the highest-ranked non-energy-efficient cell in the second cell set that meets the reselection conditions; the SIB1 of the non-energy-efficient cell is a broadcast message; the frequency domain positions of the SSBs associated with each cell in the second cell set are the same, and / or the reselection priority and / or radio access type (RAT) of each cell in the second cell set are the same. That is, by searching for the first non-energy-efficient cell in the first cell set, or reselecting to the second non-energy-efficient cell in the second cell set, the problem of how the terminal device performs cell selection or cell reselection in the on-demand SIB1 scenario is solved. Attached Figure Description

[0133] Figure 1 is a schematic diagram of the community selection;

[0134] Figure 2 is a schematic diagram of cell reselection;

[0135] Figure 3 is a schematic diagram of the mechanism for triggering SIB1 on demand;

[0136] Figure 4 is a schematic flowchart of a cell selection or reselection method according to an embodiment of the present disclosure;

[0137] Figure 5 is a schematic flowchart of another cell selection or reselection method according to an embodiment of this disclosure;

[0138] Figure 6 is a schematic flowchart of another cell reselection method according to an embodiment of this disclosure;

[0139] Figure 7 is a schematic flowchart of another cell selection or reselection method according to an embodiment of the present disclosure;

[0140] Figure 8 is a schematic flowchart of another cell selection or reselection method according to an embodiment of the present disclosure;

[0141] Figure 9 is a schematic flowchart of another cell reselection method according to an embodiment of this disclosure;

[0142] Figure 10 is a schematic diagram of the cell selection process according to an embodiment of this disclosure;

[0143] Figure 11 is a schematic diagram of another cell selection process according to an embodiment of this disclosure;

[0144] Figure 12 is a flowchart illustrating another cell reselection method according to an embodiment of this disclosure;

[0145] Figure 13 is a flowchart illustrating the cell reselection method according to an embodiment of this disclosure;

[0146] Figure 14 is a schematic flowchart of another cell reselection method according to an embodiment of the present disclosure;

[0147] Figure 15 is a schematic diagram of a cell selection or reselection device according to an embodiment of the present disclosure;

[0148] Figure 16 is a structural schematic diagram of another cell selection or reselection device according to an embodiment of the present disclosure;

[0149] Figure 17 is a structural schematic diagram of another cell selection or reselection device according to an embodiment of the present disclosure;

[0150] Figure 18 is a structural schematic diagram of another cell selection or reselection device according to an embodiment of the present disclosure;

[0151] Figure 19 is a structural schematic diagram of another cell selection or reselection device according to an embodiment of the present disclosure;

[0152] Figure 20 is a structural schematic diagram of another cell selection or reselection device according to an embodiment of the present disclosure;

[0153] Figure 21 is a schematic diagram of the structure of the cell selection or reselection device according to an embodiment of this disclosure. Detailed Implementation

[0154] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments.

[0155] 1. Choosing a residential community.

[0156] When a terminal device is cold-started (just powered on) or when the terminal device itself has link performance issues, a cell selection process is required. The main steps are as follows:

[0157] 1) The User Equipment (UE) determines whether there is pre-stored cell information;

[0158] 2) If there is pre-stored cell information (frequency information), the UE will perform cell selection based on the stored cell information.

[0159] a) When the UE discovers a suitable cell in the stored cell information, the UE selects the corresponding cell;

[0160] b) The definition of a Suitable Cell includes the following:

[0161] (1) The SSB measurement of the cell meets the S criterion, which is a measurement criterion for the SSB signal. This parameter verification mainly uses the parameters under the cellSelectionInfo field in SIB1;

[0162] (2) Some parameters in cell SIB1 meet the UE requirements, specifically including:

[0163] 1. Does the cell PLMN parameter meet the UE requirements? This parameter verification mainly uses the PLMN-IdentityInfoList field under cellAccessRelatedInfo in SIB1;

[0164] 2. The uplink / downlink bandwidth of the cell meets the UE's requirements. This parameter is primarily verified using the `carrierBandwidth` field under `downlinkConfigCommon` and `uplinkConfigCommon` in SIB1.

[0165] 3) If no pre-stored cell information is available, the UE performs an initial cell selection step. Specifically, the UE detects the SSB at each frequency point (on the synchronization grid) and searches for the cell with the best channel performance;

[0166] 4) When the UE discovers that the cell is a suitable cell, the UE selects (and camps on) the corresponding cell;

[0167] a) Specifically, the method for determining a suitable cell is the same as in the previous branch;

[0168] This content can be understood in conjunction with Figure 1, which is a schematic diagram of cell selection.

[0169] 2. Reselection of the neighborhood.

[0170] Cell reselection is one of the important ways for idle-state UEs to maintain good performance in their camped cells in current New Radio (NR) networks. Specifically, the cell reselection process operates based on the priority between frequency points:

[0171] 1) For cells with a higher priority than the cell where the terminal device is currently camped:

[0172] a) For each high-priority cell, reselection to that cell is possible when the corresponding cell reselection conditions are met; the cell reselection conditions are measurement criteria based on the SSB signal. This parameter verification mainly uses the configuration parameters in SIB2 (co-frequency cell, i.e., the SSB and the currently camped cell are on the same frequency) / SIB4 (different frequency cell, i.e., the SSB and the currently camped cell are not on the same frequency).

[0173] b) The aforementioned cells also need to meet their respective S-criteria requirements. The relevant parameters for the S-criteria are notified in SIB2 / SIB4 of the cell.

[0174] 2) For cells with the same priority as the cell where the terminal device is currently camped:

[0175] a) Based on the R criterion parameters corresponding to the cell, determine whether the sorting conditions (reselection conditions) are met. The specific parameters are configured in SIB2 / SIB4 of the cell to be camped; when the measurement performance of the cell to be reselected is better than that of the current cell, and the terminal camps on the current cell for more than 1 second, reselection is performed;

[0176] b) The aforementioned cells also need to meet their respective S-criteria requirements. The relevant parameters for the S-criteria are notified in SIB2 / SIB4 of the cell.

[0177] 3) For cells with a lower priority than the cell where the terminal device is currently camped:

[0178] a) When the performance of the current cell does not meet the service conditions, and each low-priority cell meets its own cell reselection criteria, the cell can be reselected. The service conditions and cell reselection criteria are measurement criteria for SSB signals. This parameter verification mainly uses the configuration parameters in SIB2 (co-frequency cell, i.e., the SSB and the current cell are on the same frequency) / SIB4 (different frequency cell, i.e., the SSB and the current cell are not on the same frequency).

[0179] b) The aforementioned cells also need to meet their respective S-criteria requirements. The relevant parameters for the S-criteria are notified in SIB2 / SIB4 of the cell.

[0180] 4) When multiple cells meet the cell reselection criteria:

[0181] a) Based on the R criterion, reselect to the cell with the highest priority (and highest ranking);

[0182] b) If the highest priority (and highest ranked) cell is another RAT cell (e.g., the currently camped cell is an NR cell, and the reselection cell is an LTE cell), then reselect to that other RAT cell;

[0183] This content can be understood in conjunction with Figure 2, which is a schematic diagram of cell reselection.

[0184] 3. Dedicated PRACH resource configuration.

[0185] Configuring dedicated PRACH signal resources for a specific function, according to current technology, mainly involves the following steps:

[0186] 1) Basic Prach configuration. Specifically, there are two configuration methods:

[0187] a) Independent Configuration. In this configuration, the PRACH configuration specific to the current function (e.g., triggering SIB1) is an independent PRACH resource. For example, it includes a separate RACH-ConfigGeneric field;

[0188] b) Shared Configuration. In this configuration, the PRACH for the current function shares common PRACH resources with PRACHs used for other functions. Simultaneously, dedicated PRACH resources belonging to the current function are determined within the common PRACH resources using parameters such as totalNumberOfRA-Preambles, ra-ssb-OccasionMaskIndex, and ra-AssociationPeriodIndex.

[0189] 2) Available PRACH resources. Specifically, this needs to be determined based on the following:

[0190] a) Time Division Duplex (TDD) frame structure configuration. This information is indicated by the field tdd-UL-DL-ConfigurationCommon. PRACH can only be transmitted in the uplink time slot;

[0191] b) SSB configuration: ssb-PeriodicityServingCell, ssb-PositionsInBurst (channel information) channelAccessMode parameters. Uplink resources with a certain interval from the SSB burst can be used to transmit PRACH. The specific interval value is determined by the channel information.

[0192] 3) The mapping relationship between PRACH resources and SSBs. Specifically, in the prior art, it is determined by the parameters ssb-perRACH-OccasionAndCB-PreamblesPerSSB or ssb-perRACH-Occasion;

[0193] 4. The 3GPP R19 energy-saving project triggers the SIB1 mechanism on demand.

[0194] The 3GPP R19 energy-saving project is currently discussing a mechanism for triggering SIB1 on demand. Its main purpose is to prevent the transmission of SIB1 in energy-saving cell scenarios under normal circumstances, thereby saving energy; when terminal devices require it, they can enable network devices to transmit SIB1 in energy-saving cells by sending an uplink trigger signal (PRACH signal).

[0195] This content can be understood in conjunction with Figure 3, which is a schematic diagram of the mechanism for triggering SIB1 on demand.

[0196] In on-demand SIB1 scenarios, network devices typically do not transmit SIB1. Correspondingly, terminals generally cannot directly obtain SIB1. However, verifying whether a cell is a suitable cell based on SIB1 is an essential step in the cell selection / cell reselection process. Therefore, in scenarios with energy-efficient cells, the existing cell selection / cell reselection process is not feasible. This raises the question of how terminal devices perform cell selection or cell reselection in on-demand SIB1 scenarios.

[0197] Based on this, this disclosure provides a cell selection or reselection method, as shown in Figure 4. Figure 4 is a schematic flowchart of a cell selection or reselection method according to an embodiment of this disclosure, including:

[0198] Step 401: Receive configuration information;

[0199] Step 402: Determine whether the first cell is a suitable cell based on the configuration information; the SIB1 of the first cell is non-broadcast information.

[0200] It should be noted that the cell selection or reselection method provided in this disclosure can be applied to a terminal; as an example, the terminal can be a user equipment (UE).

[0201] In step 401, receiving configuration information can be understood as the terminal receiving configuration information sent by a network device. The network device can be determined based on actual conditions and is not limited here. As an example, the network device can be a base station. The configuration information can be determined based on actual conditions and is not limited here. As an example, the configuration information may include information corresponding to multiple cells; the configuration information is not the RMSI or SIB1 of the first cell or an energy-saving cell; for example, the configuration information may be sent on a second cell; or, the configuration information may be received on a second cell, where the second cell is a non-energy-saving cell and the SIB1 of the non-energy-saving cell is broadcast information; the configuration information may include at least one of the following: configuration of a first PRACH signal; the first PRACH signal used to request the SIB1 of the first cell; information parameters of the first cell.

[0202] In some embodiments, the configuration information is used to request SIB1 of the first cell. Requesting SIB1 of the first cell can be understood as the configuration information being used to trigger System Information Block 1 (SIB1) of the first cell; or, the configuration information being used to obtain the Remaining Minimum System Information (RMSI) of the first cell, etc. SIB1 of the first cell is non-broadcast information; SIB1 can be understood as another name for RMSI, meaning that SIB1 and RMSI are interchangeable; the non-broadcast information can also be called on-demand triggered information, meaning it is not broadcast information, or information sent by network devices triggered by a dedicated PRACH signal (such as an Uplink Wake-Up Signaling (UL WUS signal)).

[0203] In step 402, the specific judgment process for determining whether the first cell is a suitable cell based on the configuration information can be determined according to the actual situation and is not limited here. As an example, determining whether the first cell is a suitable cell based on the configuration information may include: in the case of cell selection or cell reselection, determining whether the first cell is a suitable cell based on the configuration information.

[0204] In this embodiment, configuration information is received; the first cell is determined as a suitable cell based on the configuration information; and the SIB1 of the first cell is non-broadcast information. Specifically, by receiving SIB1 configuration information for requesting the first cell and determining whether the first cell is a suitable cell based on the configuration information, the problem of how a terminal device performs cell selection or cell reselection in an on-demand SIB1 scenario is solved.

[0205] In one embodiment, the configuration information includes at least one of the following:

[0206] Configuration of the first PRACH signal; the first PRACH signal is used to request SIB1 of the first cell;

[0207] Information parameters of the first community.

[0208] In this embodiment of the disclosure, the configuration information can be understood as including information corresponding to multiple cells, such as information parameters of multiple first cells; the configuration information is not the RMSI or SIB1 of the first cell or the energy-saving cell; for example, the configuration information can be sent on the second cell; or, the configuration information can be received on the second cell, where the second cell is a non-energy-saving cell.

[0209] The configuration of the first PRACH signal can be determined according to specific circumstances and is not limited here. As an example, the configuration of the first PRACH signal can be a wake-up signaling (WUS) configuration. The configuration of the first PRACH signal can include at least one of the following: the identifier of the first cell; the resource configuration of the first PRACH signal; the frame structure configuration of the first cell; the synchronization signal block (SSB) configuration of the first cell; the channel access mode of the first cell; the control resource set (CORESET) and search space configuration of the first cell; and the initial downlink / uplink bandwidth (BWP) and / or carrier configuration of the first cell.

[0210] The information parameters of the first cell can be determined according to specific circumstances, and are not limited here. As an example, the information parameters of the first cell can be called energy-saving cell information parameters. The information parameters of the first cell may include at least one of the following: the public land mobile network (PLMN) information of the first cell; the bandwidth information of the first cell; and the S-criteria parameters of the first cell.

[0211] In one embodiment, the configuration of the first PRACH signal includes at least one of the following:

[0212] The signage for the first residential area;

[0213] Resource configuration of the first PRACH signal;

[0214] The frame structure configuration of the first cell;

[0215] Synchronization Signal Block (SSB) configuration of the first cell;

[0216] The channel access mode of the first cell;

[0217] The configuration of the first cell's control resource set (CORESET) and search space;

[0218] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first cell.

[0219] In this embodiment of the disclosure, the identifier of the first cell can be understood as a cell identifier. As an example, the cell identifier can be the PCI parameter of an energy-saving cell.

[0220] The resource configuration of the first PRACH signal can be understood as PRACH configuration resources. As an example, the PRACH configuration resources may include PRACH resources available to the energy-saving cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, the resource configuration of the first PRACH signal may include one or more of the following parameters: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, and ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0221] The frame structure configuration of the first cell can be understood as the structure configuration under TDD. As an example, the structure configuration under TDD can be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving cell.

[0222] The SSB configuration of the first cell can be referred to as SSB configuration. As an example, the SSB configuration can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell.

[0223] The channel access mode of the first cell can be understood as channel information. As an example, the channel information can be the channelAccessMode parameter of the energy-saving cell.

[0224] In practical applications, as an example, the configuration of the first PRACH signal can be a WUS configuration; the WUS configuration includes the PRACH resource configuration of N energy-saving cells and related configurations for determining available PRACH resources. In some embodiments, the configuration of the first PRACH signal includes the following parameters:

[0225] (1) Cell identifier. In some embodiments, this information may be the PCI parameters of an energy-saving cell;

[0226] (2) PRACH configuration resources. This information includes the PRACH resources available to the energy-efficient cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, it may include one or more of the following parameters: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, ssb-perRACH-OccasionAndCB-PreamblesPerSSB;

[0227] (3) Structural configuration under TDD. In some embodiments, this information may be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving community;

[0228] (4) SSB configuration. In some embodiments, this information can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell;

[0229] (5) Channel information. In some embodiments, this information may be the channelAccessMode parameter of the energy-saving cell.

[0230] In one embodiment, the information parameters include at least one of the following:

[0231] PLMN information of the first cell;

[0232] Bandwidth information of the first cell;

[0233] The S-criterion parameters of the first cell.

[0234] In this embodiment of the disclosure, the information parameters can be understood as including the necessary parameters corresponding to the energy-saving cell; the PLMN information of the first cell can be simply referred to as PLMN information; as an example, the PLMN information can be the cellAccessRelatedInfo parameter of the energy-saving cell, or the PLMN-IdentityInfoList parameter of the energy-saving cell; the bandwidth information of the first cell can be simply referred to as bandwidth information; as an example, the bandwidth information can be the uplink / downlink carrierBandwidth parameter of the energy-saving cell, or the downlinkConfigCommon and uplinkConfigCommon parameters of the energy-saving cell; the S-criteria parameter of the first cell can be simply referred to as the S-criteria parameter; as an example, the S-criteria parameter can be the cellSelectionInfo parameter of the energy-saving cell.

[0235] In practical applications, as an example, the information parameters can be understood to include the necessary parameters corresponding to energy-saving communities, including the following parameters:

[0236] 1) PLMN Information. As an example, this information can be the cellAccessRelatedInfo parameter of the energy-saving community, or the PLMN-IdentityInfoList parameter of the energy-saving community;

[0237] 2) Bandwidth information. As an example, this information can be the uplink / downlink carrierBandwidth parameter of the energy-saving cell, or the downlinkConfigCommon and uplinkConfigCommon parameters of the energy-saving cell;

[0238] 3) S-criterion parameter. As an example, this information can be the cellSelectionInfo parameter for an energy-saving community.

[0239] In one embodiment, the method further includes:

[0240] Receive the first SSB, which is associated with the first cell. When the Physical Cell Identifier (PCI) in the first SSB matches the cell identifier in the configuration information, determine that the SIB1 of the first cell is the on-demand trigger information.

[0241] In this embodiment of the disclosure, the on-demand triggering information can be understood as non-broadcast information; the non-broadcast information can be understood as not being broadcast information, or information sent by the network device based on a dedicated PRACH signal (UL WUS signal).

[0242] The receiving of the first SSB can be receiving the first SSB sent by the corresponding cell; the first SSB is associated with the first cell, which can be understood as the first SSB and the first cell having a corresponding relationship; the corresponding relationship can be determined according to the actual situation, and is not limited here. As an example, the corresponding relationship can be understood as a mapping relationship.

[0243] The Physical Cell Identifier (PCI) in the first SSB is consistent with the cell identifier in the configuration information, which can also be understood as the PCI existing in the configuration information.

[0244] In practical applications, the configuration information may include the configuration of the first PRACH signal; the configuration of the first PRACH signal may be the WUS configuration; the WUS configuration may also indicate which SSB indexes' SIB1s to send for the corresponding energy-saving cell. For example, this information is carried through a bitmap (similar to ssb-PositionsInBurst), where each bit represents whether an SSB index's corresponding SIB1 is sent. In one possible implementation, a value of 1 represents sending, and a value of 0 represents not sending. For another example, the timing of sending SIB1 indexes and PRACH; energy-saving cell information parameters and WUS configuration information can be configured to the terminal device simultaneously by a single signaling. For example, both can be stored in the RRC release signaling, or in a system message block (e.g., SIB1, or SIBx); for another example, WUS configuration and energy-saving cell parameter information can also be configured to the terminal device separately by independent signaling.

[0245] In one embodiment, the method further includes:

[0246] The configuration information is received on the second cell, where SIB1 is a broadcast message.

[0247] It should be noted that the second community is a non-energy-saving community.

[0248] This disclosure also provides a cell selection or reselection method, as shown in Figure 5. Figure 5 is a schematic flowchart of another cell selection or reselection method according to an embodiment of this disclosure, including:

[0249] Step 501: Search for the first non-energy-efficient cell in the first cell set. The first non-energy-efficient cell is the strongest non-energy-efficient cell in the first cell set, and the SIB1 of the non-energy-efficient cell is a broadcast message; the frequency domain positions of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set are the same; or,

[0250] Step 502: Reselect to the second non-energy-efficient cell in the second cell set; the second non-energy-efficient cell is the non-energy-efficient cell in the second cell set that meets the reselection conditions and has the highest ranking, and the SIB1 of the non-energy-efficient cell is a broadcast message; the frequency domain positions of the SSBs associated with each cell in the second cell set are the same, and / or the reselection priority and / or Radio Access Type (RAT) of each cell in the second cell set are the same.

[0251] It should be noted that the cell selection or reselection method provided in this disclosure can be applied to a terminal; as an example, the terminal can be a UE.

[0252] In step 501, the first non-energy-efficient cell is the strongest non-energy-efficient cell in the first cell set, and the SIB1 of the non-energy-efficient cell is a broadcast message. The strongest non-energy-efficient cell can be called the "strongest cell," which represents the cell with the best channel quality, or the cell with the best (Layer 1) L1 measurement performance. The first non-energy-efficient cell can be determined according to actual conditions and is not limited here. As an example, the first non-energy-efficient cell can be a "suitable cell." The frequency domain position of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set is the same. This can be determined according to actual conditions and is not limited here. As an example, the frequency domain position of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set is the same, which can be understood as the SSB frequency point (or the center frequency point of the corresponding SSB) of the cells in the first cell set being the same.

[0253] It is understood that step 501 can correspond to the initial selection step in the cell selection process. In step 502, the second non-energy-efficient cell is the highest-ranked non-energy-efficient cell in the second cell set that meets the reselection conditions, and the SIB1 of the non-energy-efficient cell is a broadcast message; where the highest ranking can be referred to as "highest ranked". The second non-energy-efficient cell can be determined according to the actual situation, and is not limited here. As an example, the second non-energy-efficient cell can be a suitable cell. The frequency domain positions of the SSBs associated with each cell in the second cell set are the same, which can be determined according to the actual situation, and is not limited here. As an example, the frequency domain positions of the SSBs associated with each cell in the second cell set are the same, which can be understood as the SSB frequency points (or the center frequency points of the corresponding SSBs) of the cells in the second cell set being the same. It is understood that the subcarrier spacing of the SSBs corresponding to the cells in the second cell set can also be the same, or in other words, the SSBs corresponding to the cells in the second cell set are intra-frequency, or the cells in the second cell set are intra-frequency cells.

[0254] In practical applications, both the first non-energy-saving cell and the second non-energy-saving cell can be understood as cells that are not energy-saving cells. During the cell selection process, the terminal device selects the non-energy-saving cell (with the strongest channel quality) on each frequency point (and camps there); that is, it selects the strongest non-energy-saving cell on each frequency point (and camps there); or, it selects the strongest non-energy-saving cell in each priority and / or RAT type (and camps there).

[0255] In one embodiment, the first non-energy-efficient cell is determined to be a suitable cell; the first non-energy-efficient cell is selected.

[0256] It is understandable that determining the first non-energy-efficient cell as a suitable cell means that the first non-energy-efficient cell is determined as a suitable cell based on its SIB1.

[0257] In one embodiment, the method further includes:

[0258] Receive N first SSBs; the N first SSBs correspond one-to-one with N first cells, where N is a positive integer, and the N first cells belong to either the first cell set or the second cell set;

[0259] The N first cells are determined to be energy-saving cells based on the N first SSBs, and the SIB1 of the energy-saving cells is non-broadcast information.

[0260] In this embodiment of the disclosure, the specific details of receiving N first SSBs can be determined according to actual circumstances and are not limited here. As an example, receiving N first SSBs can mean receiving N first SSBs sent by the corresponding cell. The N first SSBs correspond one-to-one with the N first cells, which can be understood as the N first SSBs having a one-to-one association relationship with the N first cells.

[0261] The specific determination process for identifying the N first cells as energy-saving cells based on the N first SSBs can be determined according to the actual situation and is not limited here. As an example, the step of determining the N first cells as energy-saving cells based on the N first SSBs may include: determining the Physical Cell Identifier (PCI) of the N first cells based on the N first SSBs; receiving configuration information; the configuration information is used to request the SIB1 of the N first cells; when the configuration information includes the Physical Cell Identifier (PCI) from the first SSBs, the N first cells are determined to be energy-saving cells. The step of determining the N first cells as energy-saving cells based on the N first SSBs may further include: determining the N first cells as energy-saving cells based on a first feature among the N first SSBs; wherein the first feature includes one or more of the following: the frequency domain position of the first SSB; the presence of a first field in the main information block (MIB) of the first SSB; the offset indication information (Kssb) of the first SSB having a first value; the control resource indication information (PDCCH-configSIB1) of the first SSB having a second value; the physical downlink control channel (PBCH) payload of the first SSB including a first offset; the subcarrier position of the PBCH demodulation reference signal (DM-RS) of the first SSB including a second offset; and the frequency domain offset between the frequency domain position of the first SSB and the first synchronization frequency point being a third offset.

[0262] In one embodiment, the N first cells belong to either the first cell set or the second cell set; that is, the first cell set or the second cell set includes the N first cells.

[0263] In one embodiment, the channel quality of M of the N first cells is stronger than that of the first non-energy-saving cell, or the channel quality of M of the N first cells is stronger than that of the second non-energy-saving cell; M is a positive integer, and M is less than or equal to N.

[0264] In this embodiment of the disclosure, the channel quality of M of the N first cells is stronger than that of the first non-energy-saving cell. This can be understood as the channel quality of the M of the N first cells being better or having better performance than that of the first non-energy-saving cell, or in other words, the M of the N first cells being stronger than the first non-energy-saving cell. In the protocol, "stronger than" is generally used to indicate better channel quality, or in other words, a cell with better (Layer 1) L1 measurement performance, or a stronger cell.

[0265] That is, in the first set of cells or the second set of cells, there exists an energy-saving cell that is stronger (better channel quality, better performance) than the first non-energy-saving cell or the second non-energy-saving cell.

[0266] In one embodiment, determining the N first cells as energy-saving cells based on the N first SSBs includes:

[0267] The Physical Cell Identifier (PCI) of the N first cells is determined based on the N first SSBs;

[0268] Receive configuration information;

[0269] When the configuration information includes the Physical Cell Identifier (PCI) in the first SSB, the N first cells are determined to be energy-saving cells.

[0270] In this embodiment of the disclosure, receiving configuration information can be understood as the terminal receiving configuration information sent by a network device. The network device can be determined according to actual circumstances and is not limited here. As an example, the network device can be a base station. The configuration information can be determined according to actual circumstances and is not limited here. As an example, the configuration information may include information corresponding to multiple cells; the configuration information is not the RMSI or SIB1 of the first cell or an energy-saving cell; for example, the configuration information may be sent on a second cell; or, the configuration information may be received on a second cell, where the second cell is a non-energy-saving cell; the configuration information may include at least one of the following: configuration of a first PRACH signal; the first PRACH signal used to request the SIB1 of the first cell; information parameters of the first cell.

[0271] The configuration information includes the Physical Cell Identifier (PCI) in the first SSB. This can be understood as the PCI of the N first cells being consistent with the cell identifier in the WUS configuration of the configuration information.

[0272] In one embodiment, determining the N first cells as energy-saving cells based on the N first SSBs includes:

[0273] The N first cells are determined to be energy-saving cells based on a first characteristic among the N first SSBs; wherein the first characteristic includes one or more of the following:

[0274] The frequency domain location of the first SSB;

[0275] The first field exists in the main information block (MIB) of the first SSB;

[0276] The offset indication information Kssb of the first SSB is the first value;

[0277] The control resource indication information PDCCH-configSIB1 of the first SSB is the second value;

[0278] The first SSB's physical downlink control channel (PBCH) payload includes a first bias;

[0279] The subcarrier position of the PBCH demodulation reference signal DM-RS of the first SSB includes a second bias;

[0280] The frequency domain offset between the frequency domain position of the first SSB and the first synchronization frequency point is the third offset.

[0281] In this embodiment of the disclosure, the main information block (MIB) of the first SSB contains a first field. The first field can be determined according to the actual situation and is not limited here. As an example, the first field can be understood as an additional field indicator added to the MIB. For example, 1 indicates an energy-saving cell, and 0 or the default indicates a general cell.

[0282] The offset indication information Kssb of the first SSB is a first value; in one possible implementation, when the SSB belongs to frequency range 1 (FR1), the offset indication information is 31 / 30, that is, the bit of the offset indication information in the PBCH payload is 1, and the SSB-subcarrierOffset indication in the MIB is 14 / 15 (1110 / 1111); when the SSB belongs to frequency range 2 (FR2), the offset indication information is 14 / 15, that is, the SSB-subcarrierOffset indication in the MIB is 14 / 15 (1110 / 1111).

[0283] The control resource indication information PDCCH-configSIB1 of the first SSB is a second value; in one possible implementation, this value is a reserved bit in the prior art.

[0284] The Physical Downlink Control Channel (PBCH) payload of the first SSB includes a first bias; wherein, the first bias can be determined according to the actual situation, and is not limited here. As an example, the first bias can be understood as adding an extra bit / adding an bias value to the PBCH payload.

[0285] The subcarrier position of the resource element where the PBCH demodulation reference signal DM-RS of the first SSB is located includes a second offset; wherein, the second offset can be determined according to the actual situation and is not limited here. As an example, the second offset can be understood as adding an offset value when calculating the subcarrier position of the DM-RS of the PBCH, for example, setting the parameter v = (cell identifier + first offset) mod 4.

[0286] The frequency domain offset between the frequency domain position of the first SSB and the first synchronization frequency is a third offset. The first synchronization frequency can be determined based on actual conditions. As an example, the first synchronization frequency can be the frequency domain position of a synchronization signal block in a synchronization grid. The synchronization grid is a grid in the frequency domain that includes the frequency positions of multiple synchronization signal blocks. The third offset can be determined based on actual conditions and is not limited here. As an example, the third offset can be understood as an offset value between the transmitted frequency position and the synchronization grid when searching for an SSB.

[0287] In practical applications, as an example, whether a cell is an energy-saving cell can be determined based on the SSB transmitted by the corresponding cell. In some embodiments, this can be determined using one or more of the following methods: adding an additional field to the MIB to indicate whether the cell is an energy-saving cell (e.g., 1 for energy-saving cell, 0 or default for general cell); adding an extra bit / adding an offset value to the PBCH payload; adding an offset value when calculating the subcarrier location of the DM-RS of the PBCH; and ensuring an offset value exists between the transmitted frequency point location and the synchronization grid when searching for SSBs.

[0288] The frequency domain positions of the SSBs corresponding to each cell in the first cell set are the same. This can be determined according to the actual situation and is not limited here. As an example, the fact that the frequency domain positions of the SSBs associated with each cell in the first cell set are the same can be understood as the SSB frequency points (or the center frequency points of the corresponding SSBs) of the cells in the first cell set being the same. It can also be understood that the subcarrier spacing of the SSBs corresponding to the cells in the first cell set can also be the same, or in other words, the SSBs corresponding to the cells in the first cell set are intra-frequency, or the cells in the first cell set are intra-frequency cells.

[0289] In one embodiment, the method further includes:

[0290] Based on preset storage information, the second cell is determined to be an energy-saving cell, and the SIB1 of the energy-saving cell is non-broadcast information.

[0291] In some embodiments, determining the second cell as an energy-saving cell based on preset storage information can be performed before step 501.

[0292] In this embodiment of the disclosure, the preset storage information can be determined according to the actual situation and is not limited here. As an example, the preset storage information can be information for storing information sent by other devices or information pre-stored by the device itself. The preset storage information can also be referred to as storage information.

[0293] It is understood that the stored information may be information pre-stored by the terminal device, or the stored information may be inherent to the terminal device.

[0294] It is understandable that the above steps correspond to the steps in the cell selection process that select cells based on stored information.

[0295] In one embodiment, the method further includes:

[0296] Determine that the second cell is not a suitable cell, or do not select the second cell.

[0297] The above embodiments can also be understood as not selecting energy-saving communities, or not searching for energy-saving communities.

[0298] In one embodiment, the stored information does not include configuration information for a first PRACH signal, which is used to request SIB1 of the second cell.

[0299] The above method can also be understood as follows: when the stored information contains information that can indicate that the second cell is an energy-saving cell, but does not contain configuration information for requesting the PRACH signal of the second cell SIB1, the second cell is not selected / the second cell is not searched / the second cell is determined not to be a suitable cell.

[0300] Based on the above steps, when selecting a cell based on stored information, the terminal device can avoid requesting / triggering / enabling SIB1 of the energy-saving cell, thereby further reducing the transmission power consumption of the network device.

[0301] Accordingly, this disclosure also provides a cell reselection method, as shown in FIG6. FIG6 is a schematic flowchart of another cell reselection method according to an embodiment of this disclosure, including:

[0302] Step 601: Receive configuration information;

[0303] Step 602: When there is a non-energy-saving cell in the third cell set that meets the reselection conditions, reselect to the third non-energy-saving cell. The third non-energy-saving cell is the non-energy-saving cell that meets the reselection conditions and has the highest ranking. The SIB1 of the non-energy-saving cell is a broadcast message.

[0304] Step 603: When there are no non-energy-saving cells that meet the reselection conditions among all cells in the third cell set, and there are energy-saving cells that meet the reselection conditions, request the SIB1 of the first energy-saving cell according to the configuration information; the first energy-saving cell is the energy-saving cell in the third cell set that meets the reselection conditions and has the highest ranking, and the SIB1 of the energy-saving cell is non-broadcast information.

[0305] It should be noted that the cell selection or reselection method provided in this disclosure can be applied to a terminal; as an example, the terminal can be a UE.

[0306] In step 601, the configuration information can be determined according to the actual situation, and is not limited here. As an example, the configuration information may include information corresponding to multiple cells; the configuration information is not the first energy-saving cell or the RMSI or SIB1 of the energy-saving cell; for example, the configuration information may be sent on a second cell; or the configuration information may be received on a second cell, which is a non-energy-saving cell; the configuration information may include at least one of the following: the configuration of a first PRACH signal; the first PRACH signal is used to request the SIB1 of the first energy-saving cell; information parameters of the first energy-saving cell.

[0307] In some embodiments, the configuration information is used to request the SIB1 of the first energy-saving cell. Requesting the SIB1 of the first energy-saving cell can be understood as triggering the SIB1 of the first energy-saving cell; or, the configuration information can be used to obtain the RMSI of the first energy-saving cell, etc. The SIB1 of the first energy-saving cell is non-broadcast information; SIB1 can be understood as another name for RMSI; the non-broadcast information can also be called on-demand triggered information, which can be understood as not being broadcast information, or information sent by network devices triggered by a dedicated PRACH signal (UL WUS signal).

[0308] In step 602, the third non-energy-saving cell is the non-energy-saving cell that meets the reselection conditions and has the highest ranking. The SIB1 of the non-energy-saving cell is a broadcast message; the highest ranking can be referred to as "highest ranked". The third non-energy-saving cell can be determined according to the actual situation and is not limited here.

[0309] In step 603, requesting the SIB1 of the first energy-saving cell according to the configuration information can be understood as triggering the SIB1 of the first energy-saving cell according to the configuration information; or, obtaining the SIB1 of the first energy-saving cell according to the configuration information, etc. The first energy-saving cell is the energy-saving cell in the third cell set that meets the reselection conditions and has the highest ranking. The SIB1 of the first energy-saving cell is non-broadcast information. Here, "highest ranked" can be referred to as "highest ranked." It can be understood that requesting the SIB1 of the first energy-saving cell according to the configuration information means sending a PRACH signal to request the SIB1 of the first energy-saving cell according to the configuration information.

[0310] In practical applications, the terminal receives stored / broadcast information, which includes WUS configuration information. This allows the terminal device to trigger SIB1 of the energy-saving cell according to specific rules during the cell selection process, thereby determining whether reselection / camping is possible. The base station sends the WUS configuration to the terminal device. The terminal device receives the WUS configuration. When a terminal device performs a cell reselection process: Method 1 (multiple priorities / RATs jointly determine whether to trigger SIB1): For all priorities (including those higher than the current cell priority, those with the same priority as the current cell priority, and those lower than the current cell priority) and RATs, if a non-energy-efficient cell meets the reselection conditions and is a suitable cell, then the device reselects / camps in the corresponding non-energy-efficient cell according to the priority / sorting rules in the existing technology; if only an energy-efficient cell meets the reselection conditions, then the device sends the corresponding PRACH signal according to the priority / sorting rules in the existing technology, triggering SIB1 for the energy-efficient cell. Method 2 (per-priority determination to trigger SIB1): For a specific priority (including various RAT types) for cell reselection, if a non-energy-efficient cell meets the reselection conditions and is a suitable cell, then the device reselects / camps in the corresponding non-energy-efficient cell according to the sorting rules (R criterion) in the existing technology; if only an energy-efficient cell meets the reselection conditions, then the device sends the corresponding PRACH signal according to the sorting rules in the existing technology, triggering SIB1 for the energy-efficient cell.

[0311] In one embodiment, the method further includes:

[0312] The first energy-saving cell was determined to be a suitable cell;

[0313] Reselect to the first energy-saving community.

[0314] In this embodiment of the disclosure, it can be understood that when a non-energy-efficient cell meets the reselection conditions and that cell is a suitable cell, the cell is reselected / camped on according to the priority / sorting rules in the prior art. It is understood that determining the first energy-efficient cell as a suitable cell means determining the first energy-efficient cell as a suitable cell based on its SIB1.

[0315] In one embodiment, the third cell set includes at least one of the following:

[0316] The frequency domain positions of the SSBs associated with each cell in the third cell set are the same.

[0317] The subcarrier spacing of the SSBs associated with each cell in the third cell set is the same;

[0318] The reselection priority of each cell in the third cell set is the same;

[0319] The RATs of all cells in the third cell set are the same;

[0320] The third cell set consists of all cells that can be used for cell reselection.

[0321] It should be noted that the frequency domain positions of the SSBs associated with each cell in the third cell set are the same. This can be determined according to the actual situation and is not limited here. As an example, the fact that the frequency domain positions of the SSBs associated with each cell in the third cell set are the same can be understood as the SSB frequency points (or the center frequency points of the corresponding SSBs) of the cells in the third cell set being the same. It can also be understood that the subcarrier spacing of the SSBs corresponding to the cells in the third cell set can be the same, or in other words, the SSBs corresponding to the cells in the third cell set are intra-frequency, or the cells in the third cell set are intra-frequency cells.

[0322] In one possible implementation, the cells in the third cell set have the same reselection priority, but the frequency domain positions of their corresponding SSBs and the SSBs of the cell where the terminal device is currently camped are different. Alternatively, the cells in the third cell set have the same reselection priority, but the subcarrier spacing of their corresponding SSBs and the SSBs of the cell where the terminal device is currently camped is different. That is, the cells in the third cell set are inter-frequency cells with the same priority.

[0323] In one possible implementation, the RAT corresponding to each cell in the third set of cells and the SSB frequency domain position of the cell currently camped by the terminal device are different. That is, the cells in the third set of cells are inter-RAT cells.

[0324] In one possible implementation, the third set of cells includes all cells that can be used for reselection, that is, all reselection cells configured by the network device.

[0325] In one embodiment, the configuration information includes the configuration of a first physical random access channel (PRACH) signal; the first PRACH signal is used to request SIB1 of the first energy-saving cell.

[0326] In this embodiment of the disclosure, the configuration information can be understood to include information corresponding to one or more energy-saving cells; the configuration information is not the first energy-saving cell or the RMSI or SIB1 of the energy-saving cell; for example, the configuration information can be sent on a second cell; or, the configuration information can be received on a second cell, where the second cell is a non-energy-saving cell.

[0327] The configuration of the first PRACH signal can be determined according to specific circumstances and is not limited here. As an example, the configuration of the first PRACH signal can be a WUS configuration. The configuration of the first PRACH signal can include at least one of the following: the identifier of the first energy-saving cell; the resource configuration of the first PRACH signal; the frame structure configuration of the first energy-saving cell; the synchronization signal block (SSB) configuration of the first energy-saving cell; the channel access mode of the first energy-saving cell; the control resource set (CORESET) and search space configuration of the first energy-saving cell; and the initial downlink / uplink partial bandwidth (BWP) and / or carrier configuration of the first energy-saving cell.

[0328] In one embodiment, the configuration of the first PRACH signal includes at least one of the following:

[0329] The signage for the first energy-saving community;

[0330] Resource configuration of the first PRACH signal;

[0331] The frame structure configuration of the first energy-saving cell;

[0332] The synchronization signal block (SSB) configuration of the first energy-saving cell;

[0333] The channel access mode of the first energy-saving cell;

[0334] The configuration of the first energy-saving community control resource set (CORESET) and search space;

[0335] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first energy-saving cell.

[0336] In this embodiment of the disclosure, the identifier of the first energy-saving community can be understood as a community identifier. As an example, the community identifier can be the PCI parameter of the energy-saving community.

[0337] The resource configuration of the first PRACH signal can be understood as PRACH configuration resources. As an example, the PRACH configuration resources may include PRACH resources available to the energy-saving cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, one or more of the following parameters may be included: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0338] The frame structure configuration of the first energy-saving cell can be understood as the structure configuration under TDD. As an example, the structure configuration under TDD can be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving cell.

[0339] The SSB configuration of the first energy-saving cell can be simply referred to as SSB configuration. As an example, the SSB configuration can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell.

[0340] The channel access mode of the first energy-saving cell can be understood as channel information. As an example, the channel information can be the channelAccessMode parameter of the energy-saving cell.

[0341] In practical applications, as an example, the configuration of the first PRACH signal can be a WUS configuration; the WUS configuration includes the PRACH resource configuration of N energy-saving cells and related configurations for determining available PRACH resources. In some embodiments, the configuration of the first PRACH signal includes the following parameters:

[0342] (1) Cell identifier. In some embodiments, this information may be the PCI parameters of an energy-saving cell;

[0343] (2) PRACH Configuration Resources. This information includes the PRACH resources available to the energy-efficient cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, it may include one or more of the following parameters: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0344] (3) Structural configuration under TDD. In some embodiments, this information may be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving community;

[0345] (4) SSB configuration. In some embodiments, this information can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell;

[0346] (5) Channel information. In some embodiments, this information may be the channelAccessMode parameter of the energy-saving cell.

[0347] Accordingly, this disclosure also provides another cell selection or reselection method, as shown in FIG7. FIG7 is a schematic flowchart of another cell selection or reselection method according to an embodiment of this disclosure, including:

[0348] Step 701: Send configuration information; the configuration information is used to determine whether the first cell is a suitable cell; the SIB1 of the first cell is non-broadcast information.

[0349] It should be noted that another cell selection or reselection method provided in this disclosure embodiment can be applied to network devices; as an example, the network device can be a base station.

[0350] In step 701, sending configuration information can be understood as the network device sending configuration information to the terminal. The terminal can be determined based on actual circumstances and is not limited here; as an example, the terminal can be a UE. The configuration information can be determined based on actual circumstances and is not limited here; as an example, the configuration information can include information corresponding to multiple cells; the configuration information is not the RMSI or SIB1 of the first cell or an energy-saving cell, and the SIB1 of the first cell is a non-broadcast message; for example, the configuration information can be sent on a second cell; or, the configuration information can be received on a second cell, where the second cell is a non-energy-saving cell, or in other words, the SIB1 of the second cell is broadcast information; the configuration information can include at least one of the following: configuration of a first PRACH signal; the first PRACH signal used to request the SIB1 of the first cell; information parameters of the first cell.

[0351] In some embodiments, the configuration information is used to request the SIB1 of the first cell. Requesting the SIB1 of the first cell can be understood as triggering the SIB1 of the first cell; or, the configuration information can be used to obtain the RMSI of the first cell, etc.; where SIB1 can be understood as another name for RMSI; the non-broadcast information can also be called on-demand triggered information, which can be understood as not being broadcast information, or information sent by network devices triggered by a dedicated PRACH signal (UL WUS signal).

[0352] The configuration information is used to determine whether the first cell is a suitable cell. This can be understood as the configuration information being used by the terminal to determine whether the first cell is a suitable cell. The specific determination process in which the configuration information is used by the terminal to determine whether the first cell is a suitable cell can be determined according to the actual situation and is not limited here. As an example, the configuration information used by the terminal to determine whether the first cell is a suitable cell may include, in the case of cell selection or cell reselection, the terminal determining whether the first cell is a suitable cell based on the configuration information.

[0353] In one embodiment, the configuration information includes at least one of the following:

[0354] Configuration of the first PRACH signal; the first PRACH signal is used to trigger SIB1 of the first cell;

[0355] Information parameters of the first community.

[0356] In this embodiment of the disclosure, the configuration information can be understood to include information corresponding to multiple cells; the configuration information is not the RMSI or SIB1 of the first cell or the energy-saving cell; for example, the configuration information can be sent on the second cell; or, the configuration information can be received on the second cell, which is a non-energy-saving cell.

[0357] The configuration of the first PRACH signal can be determined according to specific circumstances and is not limited here. As an example, the configuration of the first PRACH signal can be a WUS configuration. The configuration of the first PRACH signal can include at least one of the following: the identifier of the first cell; the resource configuration of the first PRACH signal; the frame structure configuration of the first cell; the synchronization signal block (SSB) configuration of the first cell; the channel access mode of the first cell; the control resource set (CORESET) and search space configuration of the first cell; and the initial downlink / uplink partial bandwidth (BWP) and / or carrier configuration of the first cell.

[0358] The information parameters of the first cell can be determined according to specific circumstances, and are not limited here. As an example, the information parameters of the first cell can be called energy-saving cell information parameters. The information parameters of the first cell may include at least one of the following: the public land mobile network (PLMN) information of the first cell; the bandwidth information of the first cell; and the S-criteria parameters of the first cell.

[0359] In one embodiment, the configuration of the first PRACH signal includes at least one of the following:

[0360] The signage for the first residential area;

[0361] Resource configuration of the first PRACH signal;

[0362] The frame structure configuration of the first cell;

[0363] Synchronization Signal Block (SSB) configuration of the first cell;

[0364] The channel access mode of the first cell;

[0365] The configuration of the first cell's control resource set (CORESET) and search space;

[0366] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first cell.

[0367] In this embodiment of the disclosure, the identifier of the first cell can be understood as a cell identifier. As an example, the cell identifier can be the PCI parameter of an energy-saving cell.

[0368] The resource configuration of the first PRACH signal can be understood as PRACH configuration resources. As an example, the PRACH configuration resources may include PRACH resources available to the energy-saving cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, the resource configuration of the first PRACH signal may include one or more of the following parameters: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, and ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0369] The frame structure configuration of the first cell can be understood as the structure configuration under TDD. As an example, the TDD structure configuration can be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving cell.

[0370] The SSB configuration of the first cell can be referred to as SSB configuration. As an example, the SSB configuration can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell.

[0371] The channel access mode of the first cell can be understood as channel information. As an example, the channel information can be the channelAccessMode parameter of the energy-saving cell.

[0372] In practical applications, as an example, the configuration of the first PRACH signal can be a WUS configuration; the WUS configuration includes the PRACH resource configuration of N energy-saving cells and related configurations for determining available PRACH resources. In some embodiments, the configuration of the first PRACH signal includes the following parameters:

[0373] (1) Cell identifier. In some embodiments, this information may be the PCI parameters of an energy-saving cell;

[0374] (2) PRACH configuration resources. This information includes the PRACH resources available to the energy-efficient cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, it may include one or more of the following parameters: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, ssb-perRACH-OccasionAndCB-PreamblesPerSSB;

[0375] (3) Structural configuration under TDD. In some embodiments, this information may be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving community;

[0376] (4) SSB configuration. In some embodiments, this information can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell;

[0377] (5) Channel information. In some embodiments, this information may be the channelAccessMode parameter of the energy-saving cell.

[0378] In one embodiment, the information parameters include at least one of the following:

[0379] Public Land Mobile Network (PLMN) information for the first cell;

[0380] Bandwidth information of the first cell;

[0381] The S-criterion parameters of the first cell.

[0382] In this embodiment of the disclosure, the information parameters can be understood as including the necessary parameters corresponding to the energy-saving cell; the PLMN information of the first cell can be simply referred to as PLMN information; as an example, the PLMN information can be the cellAccessRelatedInfo parameter of the energy-saving cell, or the PLMN-IdentityInfoList parameter of the energy-saving cell; the bandwidth information of the first cell can be simply referred to as bandwidth information; as an example, the bandwidth information can be the uplink / downlink carrierBandwidth parameter of the energy-saving cell, or the downlinkConfigCommon and uplinkConfigCommon parameters of the energy-saving cell; the S-criteria parameter of the first cell can be simply referred to as the S-criteria parameter; as an example, the S-criteria parameter can be the cellSelectionInfo parameter of the energy-saving cell.

[0383] In practical applications, as an example, the information parameters can be understood to include the necessary parameters corresponding to energy-saving communities, including the following parameters:

[0384] 1) PLMN Information. As an example, this information can be the cellAccessRelatedInfo parameter of the energy-saving community, or the PLMN-IdentityInfoList parameter of the energy-saving community;

[0385] 2) Bandwidth information. As an example, this information can be the uplink / downlink carrierBandwidth parameter of the energy-saving cell, or the downlinkConfigCommon and uplinkConfigCommon parameters of the energy-saving cell;

[0386] 3) S-criterion parameter. As an example, this information can be the cellSelectionInfo parameter for an energy-saving community.

[0387] In one embodiment, the method further includes:

[0388] Send a first SSB, which is associated with the first cell. The first SSB is used to determine that the SIB1 of the first cell is on-demand trigger information when the Physical Cell Identifier (PCI) in the first SSB matches the cell identifier in the configuration information.

[0389] In this embodiment of the disclosure, the on-demand triggering information can be understood as non-broadcast information; the non-broadcast information can be understood as information that is not broadcast information, or information sent by the network device based on a dedicated PRACH signal (UL WUS signal).

[0390] Sending the first SSB can be a network device sending the first SSB to the terminal; the first SSB is associated with the first cell, which can be understood as the first SSB and the first cell having a corresponding relationship; the corresponding relationship can be determined according to the actual situation, and is not limited here. As an example, the corresponding relationship can be understood as a mapping relationship.

[0391] The Physical Cell Identifier (PCI) in the first SSB is consistent with the cell identifier in the configuration information, which can also be understood as the PCI existing in the configuration information.

[0392] In practical applications, the configuration information may include the configuration of the first PRACH signal; the configuration of the first PRACH signal may be the WUS configuration; the WUS configuration may also indicate which SSB indexes' SIB1s to send for the corresponding energy-saving cell. For example, this information is carried through a bitmap (similar to ssb-PositionsInBurst), where each bit represents whether an SSB index's corresponding SIB1 is sent. In one possible implementation, a value of 1 represents sending, and a value of 0 represents not sending. For another example, the timing of sending SIB1 indexes and PRACH; energy-saving cell information parameters and WUS configuration information can be configured to the terminal device simultaneously by a single signaling. For example, both can be stored in the RRC release signaling, or in a system message block (e.g., SIB1, or SIBx); for another example, WUS configuration and energy-saving cell parameter information can also be configured to the terminal device separately by independent signaling.

[0393] Accordingly, this disclosure also provides another cell selection or reselection method, as shown in FIG8. FIG8 is a schematic flowchart of another cell selection or reselection method according to an embodiment of this disclosure, including:

[0394] Step 801: Send N first SSBs; the N first SSBs correspond one-to-one with the N first cells, where N is a positive integer; the N first cells are energy-saving cells, and the SIB1 of the energy-saving cells is non-broadcast information.

[0395] It should be noted that another cell selection or reselection method provided in this disclosure embodiment can be applied to network devices; as an example, the network device can be a base station.

[0396] In this embodiment, the specific details of sending N first SSBs can be determined based on actual circumstances and are not limited here. As an example, sending N first SSBs can be the network device sending N first SSBs of the corresponding cell to the terminal. The N first SSBs correspond one-to-one with the N first cells, meaning that each of the N first SSBs has a one-to-one association with one of the N first cells. Furthermore, the N first cells are energy-saving cells, and the SIB1 of the energy-saving cells is non-broadcast information; in other words, the SIB of the energy-saving cells is not broadcast information.

[0397] In practical applications, the N first SSBs can be used to determine whether the N first cells belong to a first cell set and / or a second cell set. The specific determination process for identifying the N first cells as energy-saving cells based on the N first SSBs can be determined according to actual circumstances and is not limited here. As an example, determining the N first cells as energy-saving cells based on the N first SSBs may include: determining the Physical Cell Identifier (PCI) of the N first cells based on the N first SSBs; receiving configuration information; the configuration information is used to request the SIB1 of the N first cells; when the configuration information includes the Physical Cell Identifier (PCI) from the first SSBs, the N first cells are determined to be energy-saving cells. The step of determining the N first cells as energy-saving cells based on the N first SSBs may further include determining the N first cells as energy-saving cells based on a first feature among the N first SSBs; wherein the first feature includes one or more of the following: the frequency domain position of the first SSB; the presence of a first field in the main information block (MIB) of the first SSB; the offset indication information (Kssb) of the first SSB having a first value; the control resource indication information (PDCCH-configSIB1) of the first SSB having a second value; the physical downlink control channel (PBCH) payload of the first SSB including a first offset; the subcarrier position of the PBCH demodulation reference signal (DM-RS) of the first SSB including a second offset; and the frequency domain offset between the frequency domain position of the first SSB and the first synchronization frequency point being a third offset.

[0398] Accordingly, this disclosure also provides another cell reselection method, as shown in FIG9. FIG9 is a schematic flowchart of another cell reselection method according to an embodiment of this disclosure, including:

[0399] Step 901: Send configuration information; the configuration information includes the configuration of the first physical random access channel (PRACH) signal; the first PRACH signal is used to request the SIB1 of the first energy-saving cell; the SIB1 of the first energy-saving cell is non-broadcast information.

[0400] It should be noted that another cell selection or reselection method provided in this disclosure embodiment can be applied to network devices; as an example, the network device can be a base station.

[0401] In step 901, sending configuration information can be understood as the network device sending configuration information to the terminal. The configuration information can be determined according to the actual situation and is not limited here. As an example, the configuration information may include information corresponding to multiple cells. The configuration information is not the first energy-saving cell or the RMSI or SIB1 of the energy-saving cell. For example, the configuration information may be sent on a second cell; or the configuration information may be received on a second cell, which is a non-energy-saving cell. The configuration information may include the configuration of a first PRACH signal. The first PRACH signal is used to request the SIB1 of the first energy-saving cell.

[0402] In some embodiments, the configuration information is used to request the SIB1 of the first energy-saving cell. Requesting the SIB1 of the first energy-saving cell can be understood as triggering the SIB1 of the first energy-saving cell; or, the configuration information can be used to obtain the RMSI of the first energy-saving cell, etc. The SIB1 of the first energy-saving cell is non-broadcast information; SIB1 can be understood as another name for RMSI; the non-broadcast information can also be called on-demand triggered information, which can be understood as not being broadcast information, or information sent by network devices triggered by a dedicated PRACH signal (UL WUS signal).

[0403] In practical applications, the terminal receives stored / broadcast information, including WUS configuration information. This allows the terminal device to trigger SIB1 of the energy-saving cell according to specific rules during cell selection, thereby determining whether reselection / camping is possible. The base station sends the WUS configuration to the terminal device. The terminal device receives the WUS configuration. During the cell reselection process, the terminal device then...

[0404] Method 1 (Multiple Priority / RAT Joint Determination of SIB1 Trigger): For cell reselection based on all priorities (including those higher than the current cell priority, those with the same priority as the current cell priority, and those lower than the current cell priority) and RAT, if a cell with a non-energy-efficient cell meets the reselection condition and that cell is a suitable cell, then the cell is reselected / camped on according to the priority / sorting rules in the existing technology; if only a cell with an energy-efficient cell meets the reselection condition, then the corresponding PRACH signal is sent according to the priority / sorting rules in the existing technology to trigger SIB1 for the energy-efficient cell.

[0405] Method 2 (per priority / RAT type to determine whether SIB1 is triggered): For a cell reselection of a specific priority (and / or, specific RAT type), if a cell with a non-energy-efficient cell meets the reselection conditions and that cell is a suitable cell, then the cell is reselected / camped to the corresponding non-energy-efficient cell according to the sorting rules (R criterion) in the existing technology; if only a cell with an energy-efficient cell meets the reselection conditions, then the corresponding PRACH signal is sent according to the sorting rules in the existing technology to trigger SIB1 for the energy-efficient cell.

[0406] The configuration information can be understood as including information corresponding to multiple cells; the configuration information is not the first energy-saving cell or the RMSI or SIB1 of the energy-saving cell; for example, the configuration information can be sent on the second cell; or, the configuration information can be received on the second cell, which is a non-energy-saving cell.

[0407] The configuration of the first PRACH signal can be determined according to specific circumstances and is not limited here. As an example, the configuration of the first PRACH signal can be a WUS configuration. The configuration of the first PRACH signal can include at least one of the following: the identifier of the first energy-saving cell; the resource configuration of the first PRACH signal; the frame structure configuration of the first energy-saving cell; the synchronization signal block (SSB) configuration of the first energy-saving cell; the channel access mode of the first energy-saving cell; the control resource set (CORESET) and search space configuration of the first energy-saving cell; and the initial downlink / uplink partial bandwidth (BWP) and / or carrier configuration of the first energy-saving cell.

[0408] In one embodiment, the configuration of the first PRACH signal includes at least one of the following:

[0409] The signage for the first energy-saving community;

[0410] Resource configuration of the first PRACH signal;

[0411] The frame structure configuration of the first energy-saving cell;

[0412] The synchronization signal block (SSB) configuration of the first energy-saving cell;

[0413] The channel access mode of the first energy-saving cell;

[0414] The configuration of the first energy-saving community control resource set (CORESET) and search space;

[0415] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first energy-saving cell.

[0416] In this embodiment of the disclosure, the identifier of the first energy-saving community can be understood as a community identifier. As an example, the community identifier can be the PCI parameter of the energy-saving community.

[0417] The resource configuration of the first PRACH signal can be understood as PRACH configuration resources. As an example, the PRACH configuration resources may include PRACH resources available to the energy-saving cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, one or more of the following parameters may be included: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0418] The frame structure configuration of the first energy-saving cell can be understood as the structure configuration under TDD. As an example, the TDD structure configuration can be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving cell.

[0419] The SSB configuration of the first energy-saving cell can be simply referred to as SSB configuration. As an example, the SSB configuration can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell.

[0420] The channel access mode of the first energy-saving cell can be understood as channel information. As an example, the channel information can be the channelAccessMode parameter of the energy-saving cell.

[0421] In practical applications, as an example, the configuration of the first PRACH signal can be a WUS configuration; the WUS configuration includes the PRACH resource configuration of N energy-saving cells and related configurations for determining available PRACH resources. In some embodiments, the configuration of the first PRACH signal includes the following parameters:

[0422] (1) Cell identifier. In some embodiments, this information may be the PCI parameters of an energy-saving cell;

[0423] (2) PRACH configuration resources. This information includes the PRACH resources available to the energy-efficient cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, it may include one or more of the following parameters: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, ssb-perRACH-OccasionAndCB-PreamblesPerSSB;

[0424] (3) Structural configuration under TDD. In some embodiments, this information may be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving community;

[0425] (4) SSB configuration. In some embodiments, this information can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell;

[0426] (5) Channel information. In some embodiments, this information may be the channelAccessMode parameter of the energy-saving cell.

[0427] For ease of understanding, this disclosure provides an example of a cell selection or reselection method. This method may include the following:

[0428] I. Community Selection Process:

[0429] Branch 1: The terminal receives stored information / broadcast information, which includes WUS configuration information and the necessary information for determining a suitable cell. This allows the terminal device to determine that the energy-saving cell is a suitable cell and camp on it during the cell selection process without triggering SIB1 of the energy-saving cell.

[0430] 1. The base station equipment sends WUS configuration (and energy-saving cell information parameters) to the terminal equipment. The terminal equipment receives the WUS configuration and energy-saving cell information parameters.

[0431] The WUS configuration includes the PRACH resource configuration for N energy-efficient cells and related configurations for determining available PRACH resources. In some embodiments, the following parameters are included:

[0432] 1) Cell identifier. In some embodiments, this information may be the PCI parameters of the energy-saving cell;

[0433] 2) PRACH configuration resources. This information includes the PRACH resources available to the energy-efficient cell, and the mapping relationship between the cell's SSB index and the PRACH resources. In some embodiments, it may include one or more of the following parameters: RACH-ConfigGeneric, ra-ssb-OccasionMaskIndex, totalNumberOfRA-Preambles, ra-AssociationPeriodIndex, ssb-perRACH-Occasion, ssb-perRACH-OccasionAndCB-PreamblesPerSSB;

[0434] 3) Structure configuration under TDD. In some embodiments, this information can be the tdd-UL-DL-ConfigurationCommon parameter of the energy-saving community;

[0435] 4) SSB configuration. In some embodiments, this information can be the ssb-PeriodicityServingCell and ssb-PositionsInBurst parameters of the energy-saving cell;

[0436] 5) Channel information. In some embodiments, this information may be the channelAccessMode parameter of the energy-saving cell;

[0437] The energy-saving community information parameters include the necessary parameters corresponding to the energy-saving community, including the following parameters:

[0438] 1) PLMN information. In some embodiments, this information may be the cellAccessRelatedInfo parameter of the energy-saving cell, or the PLMN-IdentityInfoList parameter of the energy-saving cell;

[0439] 2) Bandwidth information. In some embodiments, this information may be the uplink / downlink carrierBandwidth parameter of the energy-saving cell, or the downlinkConfigCommon and uplinkConfigCommon parameters of the energy-saving cell;

[0440] 3) S-criteria parameters. In some embodiments, this information can be the cellSelectionInfo parameter of the energy-saving cell;

[0441] It is understandable that each energy-saving community can have an independent WUS configuration; or, multiple energy-saving communities can have a single WUS configuration.

[0442] Understandably, the WUS configuration can also instruct the corresponding energy-saving cell which SSB indexes' corresponding SIB1s to send. For example, this information is carried through a bitmap (similar to ssb-PositionsInBurst), where each bit represents whether a SSB index's corresponding SIB1 is sent. In one possible implementation, a value of 1 represents sending, and a value of 0 represents not sending. Another example is the timing of sending the SIB1 index and PRACH.

[0443] It is understandable that energy-saving cell information parameters and WUS configuration information can be configured to the terminal device simultaneously by a single signaling message. For example, both can be stored in the RRC release signaling message or in a system message block (e.g., SIB1 or SIBx); alternatively, WUS configuration and energy-saving cell parameter information can also be configured to the terminal device by separate signaling messages.

[0444] 2. When the terminal device performs the cell selection process, if it finds that the cell with the strongest channel quality at a certain frequency is an energy-saving cell (or, in other words, the cell's PCI matches the cell identifier in the WUS configuration):

[0445] When the terminal device receives the cell information parameters, it determines whether the current cell is a suitable cell based on these energy-saving cell information parameters.

[0446] The beneficial effect of this branch is that it enables terminal equipment to obtain the SIB1 of energy-saving cells on demand during the cell selection process, thereby enabling it to select (and camp) cells with better transmission performance and improve the efficiency of the cell selection process.

[0447] The flowchart of this branch can be understood in conjunction with Figure 10, which is a schematic diagram of the cell selection process in an embodiment of this disclosure.

[0448] Branch 2: During the cell selection process, the terminal device searches for non-energy-saving cells (with the strongest channel quality) on each frequency point;

[0449] 1. The terminal device selects a cell, and the specific steps include one or more of the following:

[0450] Based on stored information, select communities that are not energy-saving communities to remain in.

[0451] In some embodiments, the method for determining that a cell is not an energy-saving cell is that the WUS configuration and energy-saving cell information parameters received by the terminal device do not include parameters related to the first cell.

[0452] Blind detection of RF frequencies by terminal equipment. Within each RF frequency, only the cell with the best channel performance and not an energy-efficient cell is searched for and selected (and camped on).

[0453] In some embodiments, whether a cell is an energy-saving cell can be determined based on the SSB sent by the corresponding cell. In some embodiments, this determination can be made using one or more of the following methods:

[0454] (1) Add an additional field to the MIB to indicate the energy-saving community. For example, 1 indicates an energy-saving community, and 0 or the default indicates a normal community;

[0455] (2) Add an extra bit / increase the bias value in the PBCH load;

[0456] (3) When calculating the subcarrier position of the DM-RS of the PBCH, add an offset value;

[0457] (4) When searching for SSB, there is an offset value between the frequency point position of the transmission and the synchronization grid;

[0458] The beneficial effect of this branch is that by explicitly indicating energy-saving cells in the cell selection process, the terminal device can skip the selection of energy-saving cells, and the network device does not need to send SIB1, further reducing power consumption.

[0459] The flowchart of this branch can be understood in conjunction with Figure 11. As shown in Figure 11, Figure 11 is a schematic diagram of another cell selection process according to an embodiment of this disclosure.

[0460] II. Community Re-selection Process.

[0461] 1) Branch 1: The terminal receives stored information / broadcast information, which includes WUS configuration information and necessary information for determining a suitable cell, so that the terminal device can determine that the energy-saving cell is a suitable cell (and camp on it) during the cell selection process without triggering the SIB1 of the energy-saving cell.

[0462] 1. The base station equipment sends WUS configuration and energy-saving cell information parameters to the terminal equipment. The terminal equipment receives the WUS configuration and energy-saving cell information parameters.

[0463] The specific description of this step is the same as that in the cell selection, so it will not be repeated here.

[0464] 2. When the terminal device performs the cell reselection process, if it finds that a candidate cell is an energy-saving cell (or that the cell's PCI matches the cell identifier in the WUS configuration):

[0465] Based on the energy-saving community information parameters, determine whether the current community is a suitable cell.

[0466] A candidate cell is the best cell determined according to the existing cell reselection process.

[0467] The beneficial effect of this branch is that it notifies the terminal device of the WUS configuration in the energy-saving cell and the necessary parameters for determining the energy-saving cell as a suitable cell, so that the terminal device can determine whether the energy-saving cell can be camped / selected during the cell reselection process, thereby improving the efficiency of the cell reselection process and reducing the power consumption of the network sending SIB1.

[0468] The flowchart of this branch can be understood in conjunction with Figure 12, which is a schematic flowchart of another cell reselection method according to an embodiment of this disclosure.

[0469] Branch 2: The terminal receives stored information / broadcast information, which includes WUS configuration information, enabling the terminal device to trigger the SIB1 of the energy-saving cell according to specific rules during the cell selection process, thereby determining whether it can be reselected / remained.

[0470] 1. The base station equipment sends WUS configuration to the terminal equipment. The terminal equipment receives the WUS configuration.

[0471] The specific description of WUS configuration in this step is the same as that in cell selection, so it will not be repeated here.

[0472] When the terminal device performs the cell reselection process:

[0473] a) Method 1 (multiple priorities / RATs jointly determine whether to trigger SIB1): For cell reselection based on all priorities (including those higher than the current cell priority, those with the same priority as the current cell priority, and those lower than the current cell priority) and RATs, if a cell with a non-energy-efficient cell meets the reselection condition and that cell is a suitable cell, then the cell is reselected / camped on according to the priority / sorting rules in the prior art; if only a cell with an energy-efficient cell meets the reselection condition, then the corresponding PRACH signal is sent according to the priority / sorting rules in the prior art to trigger SIB1 for the energy-efficient cell.

[0474] b) Method 2 (per priority judgment to determine whether SIB1 is triggered): For a cell reselection of a specific priority (including various RAT types), if there is a non-energy-saving cell that meets the reselection conditions and the cell is a suitable cell, then the cell is reselected / camped to the corresponding non-energy-saving cell according to the sorting rules (R criterion) in the existing technology; if only an energy-saving cell meets the reselection conditions, then the corresponding PRACH signal is sent according to the sorting rules in the existing technology to trigger SIB1 for the energy-saving cell.

[0475] The beneficial effects of this branch are: it enables terminal devices to prioritize non-energy-efficient cells that meet the reselection conditions during the cell reselection process, and it is configured in the terminal WUS configuration so that the terminal device can also trigger SIB1 reselection to an energy-efficient cell when necessary. This balances cell reselection performance with network energy saving.

[0476] The flowchart of this branch can be understood in conjunction with Figure 13, which is a schematic flowchart of the cell reselection method of this disclosure embodiment.

[0477] 3) Branch 3: During the cell reselection process, the terminal device reselects to the non-energy-saving cell (with the strongest channel quality) on each frequency point (and camps there);

[0478] 1. The terminal device performs cell reselection, including:

[0479] For each priority level, only non-energy-saving cells that meet the reselection criteria are considered eligible for reselection.

[0480] For example, for NR frequency points, among cells that meet the reselection conditions and are not energy-saving cells, the cell with the highest ranking (based on the R criterion) is selected for reselection;

[0481] For example, for other RAT frequencies, among cells that meet the reselection criteria and are not energy-efficient cells, the cell with the best channel conditions is selected for reselection.

[0482] In some embodiments, whether a cell is an energy-saving cell can be determined based on the SSB sent by the corresponding cell. The specific determination method is the same as in the cell selection embodiment, and will not be repeated here.

[0483] The beneficial effect of this branch is that, in the cell reselection process, by explicitly indicating the energy-saving cell, the terminal device can skip the reselection of the energy-saving cell, and the network device does not need to send SIB1, which further reduces power consumption.

[0484] The flowchart of this branch can be understood in conjunction with Figure 14, which is another schematic diagram of the cell reselection method according to an embodiment of this disclosure.

[0485] The main contents of this disclosure include: pre-configuring relevant information for determining whether an energy-saving cell is a suitable cell to the terminal device, so that the terminal device can determine whether to camp on an energy-saving cell during cell selection / cell reselection; what the specific contents of the configuration information include; how the configuration information is sent through signaling; when the terminal device searches for an energy-saving cell during cell selection / cell reselection, it will not camp on the energy-saving cell; how to determine that the searched cell is an energy-saving cell; (for cell reselection) when the terminal device performs cell reselection, it will preferentially not camp on the energy-saving cell; the judgment conditions for this process, and when to camp on the energy-saving cell (triggering energy-saving cell SIB1), etc.

[0486] This solution proposes a cell selection / reselection method. Specifically, it designs a process for terminal equipment to perform cell selection and cell reselection when energy-saving cells (i.e., cells that do not frequently trigger SIB1) exist.

[0487] To implement the method of this disclosure embodiment, this disclosure embodiment also provides a cell selection or reselection device, as shown in FIG15. FIG15 is a structural schematic diagram of a cell selection or reselection device according to an embodiment of this disclosure; the device 1500 includes:

[0488] The receiving unit 1501 is used to receive configuration information;

[0489] The judgment unit 1502 is used to determine whether the first cell is a suitable cell based on the configuration information; the SIB1 of the first cell is non-broadcast information.

[0490] In one embodiment, the configuration information includes at least one of the following:

[0491] Configuration of the first physical random access channel (PRACH) signal; the first PRACH signal is used to request SIB1 of the first cell;

[0492] Information parameters of the first community.

[0493] In one embodiment, the configuration of the first PRACH signal includes at least one of the following:

[0494] The signage for the first residential area;

[0495] Resource configuration of the first PRACH signal;

[0496] The frame structure configuration of the first cell;

[0497] Synchronization Signal Block (SSB) configuration of the first cell;

[0498] The channel access mode of the first cell;

[0499] The configuration of the first cell's control resource set (CORESET) and search space;

[0500] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first cell.

[0501] In one embodiment, the information parameters include at least one of the following:

[0502] Public Land Mobile Network (PLMN) information for the first cell;

[0503] Bandwidth information of the first cell;

[0504] The S-criterion parameters of the first cell.

[0505] In one embodiment, the receiving unit 1501 is further configured to receive a first synchronization signal and an information block SSB, wherein the first SSB is associated with the first cell, and when the physical cell identifier (PCI) in the first SSB is consistent with the cell identifier in the configuration information, the SIB1 of the first cell is determined to be on-demand triggering information.

[0506] To implement the method of this disclosure embodiment, this disclosure embodiment also provides a cell selection or reselection device, as shown in FIG16. FIG16 is a structural schematic diagram of another cell selection or reselection device according to the present disclosure embodiment. The device 1600 includes:

[0507] Search unit 1601 is used to search for a first non-energy-efficient cell in a first cell set. The first non-energy-efficient cell is the strongest non-energy-efficient cell in the first cell set, and the SIB1 of the non-energy-efficient cell is a broadcast message. The frequency domain positions of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set are the same; or...

[0508] The reselection unit 1602 is used to reselect to the second non-energy-efficient cell in the second cell set; the second non-energy-efficient cell is the non-energy-efficient cell in the second cell set that meets the reselection conditions and has the highest ranking, and the SIB1 of the non-energy-efficient cell is a broadcast message; the frequency domain positions of the SSBs associated with each cell in the second cell set are the same, and / or the reselection priority and / or Radio Access Type (RAT) of each cell in the second cell set are the same.

[0509] In one embodiment, the device 1600 further includes a determining unit and a selecting unit; wherein,

[0510] The determining unit is used to determine that the first non-energy-saving cell is a suitable cell;

[0511] The selection unit is used to select the first non-energy-saving cell.

[0512] In one embodiment, the device 1600 further includes a receiving unit; wherein,

[0513] The receiving unit is used to receive N first SSBs; the N first SSBs correspond one-to-one with N first cells, where N is a positive integer, and the N first cells belong to either the first cell set or the second cell set.

[0514] The determining unit is further configured to determine the N first cells as energy-saving cells based on the N first SSBs, wherein the SIB1 of the energy-saving cells is non-broadcast information.

[0515] In one embodiment, the channel quality of M of the N first cells is stronger than that of the first non-energy-saving cell, or the channel quality of M of the N first cells is stronger than that of the second non-energy-saving cell; M is a positive integer, and M is less than or equal to N.

[0516] In one embodiment, the determining unit is further configured to: determine the Physical Cell Identifier (PCI) of the N first cells based on the N first SSBs; receive configuration information; the configuration information is used to request the SIB1 of the N first cells; and determine the N first cells as energy-saving cells when the configuration information includes the Physical Cell Identifier (PCI) in the first SSBs.

[0517] In one embodiment, the determining unit is further configured to determine the N first cells as energy-saving cells based on a first feature among the N first SSBs; wherein the first feature includes one or more of the following:

[0518] The frequency domain location of the first SSB;

[0519] The first field exists in the main information block (MIB) of the first SSB;

[0520] The offset indication information Kssb of the first SSB is the first value;

[0521] The control resource indication information PDCCH-configSIB1 of the first SSB is the second value;

[0522] The first SSB's physical downlink control channel (PBCH) payload includes a first bias;

[0523] The subcarrier position of the PBCH demodulation reference signal DM-RS of the first SSB includes a second bias;

[0524] The frequency domain offset between the frequency domain position of the first SSB and the first synchronization frequency point is the third offset.

[0525] In one embodiment, the determining unit is further configured to determine that the second cell is an energy-saving cell based on preset stored information, wherein the SIB1 of the energy-saving cell is non-broadcast information.

[0526] In one embodiment, the determining unit is further configured to determine that the second cell is not a suitable cell, or not to select the second cell.

[0527] In one embodiment, the stored information does not include configuration information for a first PRACH signal, which is used to request SIB1 of the second cell.

[0528] To implement the method of this disclosure embodiment, this disclosure embodiment also provides a cell selection or reselection device, as shown in FIG17. FIG17 is a structural schematic diagram of another cell selection or reselection device according to this disclosure embodiment. The device 1700 includes:

[0529] The receiving unit 1701 is used to receive configuration information;

[0530] The reselection unit 1702 is used to reselect to the third non-energy-saving cell when there is a non-energy-saving cell in the third cell set that meets the reselection conditions. The third non-energy-saving cell is the non-energy-saving cell that meets the reselection conditions and has the highest ranking. The SIB1 of the non-energy-saving cell is a broadcast message.

[0531] The request unit 1703 is used to request the SIB1 of the first energy-saving cell according to the configuration information when there are no non-energy-saving cells that meet the reselection conditions among all cells in the third cell set, and there are energy-saving cells that meet the reselection conditions; the first energy-saving cell is the energy-saving cell in the third cell set that meets the reselection conditions and has the highest ranking, and the SIB1 of the energy-saving cell is non-broadcast information.

[0532] In one embodiment, the reselection unit 1702 is further configured to determine that the first energy-saving cell is a suitable cell and reselect to the first energy-saving cell.

[0533] In one embodiment, the third cell set includes at least one of the following:

[0534] The frequency domain positions of the SSBs associated with each cell in the third cell set are the same.

[0535] The subcarrier spacing of the SSBs associated with each cell in the third cell set is the same;

[0536] The reselection priority of each cell in the third cell set is the same;

[0537] The RATs of all cells in the third cell set are the same;

[0538] The third cell set consists of all cells that can be used for cell reselection.

[0539] In one embodiment, the configuration information includes the configuration of a first physical random access channel (PRACH) signal; the first PRACH signal is used to request SIB1 of the first energy-saving cell.

[0540] In one embodiment, the configuration of the first PRACH signal includes at least one of the following:

[0541] The signage for the first energy-saving community;

[0542] Resource configuration of the first PRACH signal;

[0543] The frame structure configuration of the first energy-saving cell;

[0544] The synchronization signal block (SSB) configuration of the first energy-saving cell;

[0545] The channel access mode of the first energy-saving cell;

[0546] The configuration of the first energy-saving community control resource set (CORESET) and search space;

[0547] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first energy-saving cell.

[0548] To implement the method of this disclosure embodiment, this disclosure embodiment also provides a cell selection or reselection device, as shown in FIG18. FIG18 is a structural schematic diagram of another cell selection or reselection device according to the present disclosure embodiment. The device 1800 includes:

[0549] The sending unit 1801 is used to send configuration information; the configuration information is used to determine whether the first cell is a suitable cell; the SIB1 of the first cell is non-broadcast information.

[0550] In one embodiment, the configuration information includes at least one of the following:

[0551] Configuration of the first physical random access channel (PRACH) signal; the first PRACH signal is used to trigger SIB1 of the first cell;

[0552] Information parameters of the first community.

[0553] In one embodiment, the configuration of the first PRACH signal includes at least one of the following:

[0554] The signage for the first energy-saving community;

[0555] Resource configuration of the first PRACH signal;

[0556] The frame structure configuration of the first cell;

[0557] Synchronization Signal Block (SSB) configuration of the first cell;

[0558] The channel access mode of the first cell;

[0559] The configuration of the first cell's control resource set (CORESET) and search space;

[0560] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first cell.

[0561] In one embodiment, the information parameters include at least one of the following:

[0562] Public Land Mobile Network (PLMN) information for the first cell;

[0563] Bandwidth information of the first cell;

[0564] The S-criterion parameters of the first cell.

[0565] In one embodiment, the sending unit 1801 is further configured to send a first synchronization signal and an information block SSB, the first SSB being associated with the first cell, and the first SSB being configured to determine that the SIB1 of the first cell is on-demand triggering information when the physical cell identifier (PCI) in the first SSB is consistent with the cell identifier in the configuration information.

[0566] To implement the method of this disclosure embodiment, this disclosure embodiment also provides a cell selection or reselection device, as shown in FIG19. FIG19 is a structural schematic diagram of another cell selection or reselection device according to this disclosure embodiment. The device 1900 includes:

[0567] The transmitting unit 1901 is used to transmit N first SSBs; the N first SSBs correspond one-to-one with N first cells, where N is a positive integer; the N first cells are energy-saving cells, and the SIB1 of the energy-saving cells is non-broadcast information.

[0568] To implement the method of this disclosure embodiment, this disclosure embodiment also provides a cell reselection device, as shown in FIG20. FIG20 is a structural schematic diagram of another cell selection or reselection device according to the present disclosure embodiment. The device 2000 includes:

[0569] The sending unit 2001 is used to send configuration information; the configuration information includes the configuration of the first physical random access channel (PRACH) signal; the first PRACH signal is used to request the SIB1 of the first energy-saving cell; the SIB1 of the first energy-saving cell is non-broadcast information.

[0570] In one embodiment, the configuration of the first PRACH signal includes at least one of the following:

[0571] The signage for the first energy-saving community;

[0572] Resource configuration of the first PRACH signal;

[0573] The frame structure configuration of the first energy-saving cell;

[0574] The synchronization signal block (SSB) configuration of the first energy-saving cell;

[0575] The channel access mode of the first energy-saving cell;

[0576] The configuration of the first energy-saving community control resource set (CORESET) and search space;

[0577] The initial downlink / uplink portion bandwidth (BWP) and / or carrier configuration of the first energy-saving cell.

[0578] It should be noted that the cell selection or reselection device provided in the above embodiments is only illustrated by the division of the above-described program modules when performing cell selection or reselection. In practical applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the processing described above. In addition, the cell selection or reselection device and the cell selection or reselection method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be repeated here.

[0579] Based on the hardware implementation of the above program modules, this disclosure also provides a cell selection or reselection device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the method described above.

[0580] Correspondingly, this disclosure provides a computer program product, including a computer program on which the computer program is stored, and which, when executed by a processor, implements the steps of the method described above.

[0581] Correspondingly, embodiments of this disclosure provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described above.

[0582] It should be noted that the descriptions of the storage medium and device embodiments above are similar to those of the method embodiments above, and have similar beneficial effects. For technical details not disclosed in the storage medium and device embodiments of this disclosure, please refer to the descriptions of the method embodiments of this disclosure for understanding.

[0583] It should be noted that Figure 21 is a schematic diagram of the structure of a cell selection or reselection device according to an embodiment of the present disclosure. As shown in Figure 21, the cell selection or reselection device 2100 includes a processor 2102 and a memory 2103. In some embodiments, the cell selection or reselection device 2100 may further include a communication interface 2101, and the communication interface 2101, the processor 2102, and the memory 2103 may be connected via a bus 2104.

[0584] It is understood that memory 2103 can be volatile memory or non-volatile memory, or both. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disc, or compact disc read-only memory (CD-ROM); magnetic surface memory can be disk storage or magnetic tape storage. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), 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), SyncLink Dynamic Random Access Memory (SLDRAM), and Direct Rambus Random Access Memory (DRRAM).The memory 2103 described in the embodiments of this disclosure is intended to include, but is not limited to, these and any other suitable types of memory.

[0585] The methods disclosed in the above embodiments of this disclosure can be applied to or implemented by processor 2102. Processor 2102 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the hardware of processor 2102 or by instructions in software form. Processor 2102 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Processor 2102 can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this disclosure. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of this disclosure can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium, specifically memory 2103. Processor 2102 reads information from memory 2103 and, in conjunction with its hardware, completes the steps of the aforementioned methods.

[0586] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this disclosure. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in N embodiments. It should be understood that in the various embodiments of this disclosure, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above-described embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0587] It should be noted that, in this disclosure, 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 limitation, 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.

[0588] The methods disclosed in the several method embodiments provided in this disclosure can be arbitrarily combined without conflict to obtain new method embodiments.

[0589] The features disclosed in the several product embodiments provided in this disclosure can be combined arbitrarily without conflict to obtain new product embodiments.

[0590] The features disclosed in the several method or device embodiments provided in this disclosure can be arbitrarily combined without conflict to obtain new method or device embodiments.

[0591] The above description is merely an embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

[0592] It should be noted that terms such as "first" and "second" are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0593] Furthermore, the technical solutions described in the embodiments of this disclosure can be combined arbitrarily without conflict.

[0594] The above description is merely a preferred embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure.

Claims

1. A cell selection or reselection method, comprising: searching for a first non-energy saving cell in a first cell set, the first non-energy saving cell being a strongest non-energy saving cell in the first cell set, a system information block 1 (SIB1) of the non-energy saving cell being a broadcast message; each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set having a same frequency domain location; or, reselecting to a second non-energy saving cell in a second cell set, the second non-energy saving cell being a non-energy saving cell with a highest ranking in the second cell set that satisfies a reselection condition, a SIB1 of the non-energy saving cell being a broadcast message; each SSB associated with each cell in the second cell set having a same frequency domain location, and / or, each cell in the second cell set having a same reselection priority and / or radio access technology (RAT). 2.The method of claim 1, further comprising: determining that the first non-energy saving cell is a suitable cell; selecting the first non-energy saving cell. 3.The method of claim 1 or 2, further comprising: receiving N first SSBs, the N first SSBs corresponding to N first cells one-to-one, N being a positive integer, the N first cells belonging to the first cell set or the second cell set; determining, according to the N first SSBs, that the N first cells are energy saving cells, a SIB1 of the energy saving cell being non-broadcast information.

4. The method of claim 3, wherein, M first cells in the N first cells have a stronger channel quality than the first non-energy saving cell, or M first cells in the N first cells have a stronger channel quality than the second non-energy saving cell; M being a positive integer, M being less than or equal to N.

5. The method of claim 3 or 4, wherein, The determining, according to the N first SSBs, that the N first cells are energy saving cells, comprises: determining, according to the N first SSBs, physical cell identities (PCIs) of the N first cells; receiving configuration information; when the configuration information includes a physical cell identity (PCI) in the first SSB, determining that the N first cells are energy saving cells.

6. The method of claim 3 or 4, wherein, The determining, according to the N first SSBs, that the N first cells are energy saving cells, comprises: determining, according to a first feature in the N first SSBs, that the N first cells are energy saving cells; wherein the first feature comprises one or more of the following: a frequency domain location of the first SSB; a first field existing in a master information block (MIB) of the first SSB; an offset indication information (Kssb) of the first SSB being a first value; a control resource indication information (PDCCH-configSIB1) of the first SSB being a second value; a first bias included in a physical downlink control channel (PBCH) payload of the first SSB; a second bias included in subcarrier locations of a PBCH demodulation reference signal (DM-RS) of the first SSB; a third bias between a frequency domain location of the first SSB and a first synchronization frequency point. 7.The method of claim 1 or 2, further comprising: determining, based on preset storage information, that a second cell is an energy saving cell, a SIB1 of the energy saving cell being non-broadcast information.

8. The method of claim 7, further comprising: determining that the second cell is not a suitable cell, or not selecting the second cell.

9. The method of claim 8, wherein, the configuration information of a first physical random access channel (PRACH) signal is not included in the stored information, the first PRACH signal being used to request the SIB1 of the second cell.

10. A cell reselection method, comprising: receiving configuration information; when there is a non-energy saving cell satisfying a reselection condition in a third cell set, reselecting to a third non-energy saving cell, the third non-energy saving cell being a non-energy saving cell satisfying the reselection condition and having a highest rank, the SIB1 of the non-energy saving cell being a broadcast message; when there is no non-energy saving cell satisfying the reselection condition in all cells in the third cell set, and there is an energy saving cell satisfying the reselection condition, requesting the SIB1 of a first energy saving cell according to the configuration information, the first energy saving cell being an energy saving cell satisfying the reselection condition and having a highest rank in the third cell set, the SIB1 of the energy saving cell being non-broadcast information.

11. The method of claim 10, further comprising: determining that the first energy saving cell is a suitable cell; reselecting to the first energy saving cell.

12. The method of claim 10 or 11, wherein, the third cell set comprises at least one of the following: the frequency domain locations of the SSBs associated with each cell in the third cell set are the same; the subcarrier spacings of the SSBs associated with each cell in the third cell set are the same; the reselection priorities of each cell in the third cell set are the same; the RATs of each cell in the third cell set are the same; the third cell set is all cells available for cell reselection.

13. The method of any one of claims 10-12, wherein, the configuration information comprises configuration of a first physical random access channel (PRACH) signal, the first PRACH signal being used to request the SIB1 of the first energy saving cell.

14. The method of claim 13, wherein, the configuration of the first PRACH signal comprises at least one of the following: an identity of the first energy saving cell; a resource configuration of the first PRACH signal; a frame structure configuration of the first energy saving cell; a synchronization signal block (SSB) configuration of the first energy saving cell; a channel access mode of the first energy saving cell; a control resource set (CORESET) and search space configuration of the first energy saving cell; an initial downlink / uplink part bandwidth (BWP) and / or carrier configuration of the first energy saving cell.

15. A cell selection or reselection method, comprising: sending N first SSBs, the N first SSBs corresponding to N first cells one by one, N being a positive integer; the N first cells being energy saving cells, the SIB1 of the energy saving cells being non-broadcast information.

16. A cell reselection method, comprising: sending configuration information, the configuration information comprising configuration of a first physical random access channel (PRACH) signal, the first PRACH signal being used to request the SIB1 of a first energy saving cell; the SIB1 of the first energy saving cell being non-broadcast information.

17. The method of claim 16, wherein, the configuration of the first PRACH signal comprises at least one of the following: an identity of the first energy saving cell; Resource configuration of the first PRACH signal; Frame structure configuration of the first energy saving cell; Synchronization signal block (SSB) configuration of the first energy saving cell; Channel access mode of the first energy saving cell; Control resource set (CORESET) and search space configuration of the first energy saving cell; Initial downlink / uplink partial bandwidth (BWP) and / or carrier configuration of the first energy saving cell.

18. A cell selection or reselection apparatus, comprising: a searching unit configured to search for a first non-energy saving cell in a first cell set, the first non-energy saving cell being the strongest non-energy saving cell in the first cell set, a system information block 1 (SIB1) of the non-energy saving cell being a broadcast message; a frequency domain location of each synchronization signal and physical broadcast information block (SSB) associated with each cell in the first cell set being the same; or, a reselecting unit configured to reselect to a second non-energy saving cell in a second cell set, the second non-energy saving cell being the non-energy saving cell with the highest ranking in the second cell set that meets a reselection condition, a SIB1 of the non-energy saving cell being a broadcast message; a frequency domain location of an SSB associated with each cell in the second cell set being the same, and / or a reselection priority and / or a radio access type (RAT) of each cell in the second cell set being the same.

19. A cell reselection apparatus, comprising: a receiving unit configured to receive configuration information; a reselecting unit configured to reselect to a third non-energy saving cell when there is a non-energy saving cell in a third cell set that meets a reselection condition, the third non-energy saving cell being the non-energy saving cell with the highest ranking that meets the reselection condition, a SIB1 of the non-energy saving cell being a broadcast message; a requesting unit configured to request a SIB1 of a first energy saving cell according to the configuration information when there is no non-energy saving cell in all cells in the third cell set that meets the reselection condition and there is an energy saving cell that meets the reselection condition, the first energy saving cell being the energy saving cell with the highest ranking in the third cell set that meets the reselection condition, a SIB1 of the energy saving cell being non-broadcast information.

20. A cell selection or reselection apparatus, comprising: a sending unit configured to send N first SSBs, the N first SSBs corresponding to N first cells one by one, N being a positive integer; the N first cells being energy saving cells, a SIB1 of the energy saving cell being non-broadcast information.

21. A cell reselection apparatus, comprising: a sending unit configured to send configuration information, the configuration information including configuration of a first physical random access channel (PRACH) signal, the first PRACH signal being used to request a SIB1 of a first energy saving cell, the SIB1 of the first energy saving cell being non-broadcast information.

22. A cell selection or reselection device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, The processor, when executing the program, implements the steps of the method of any one of claims 1 to 9; or the processor, when executing the program, implements the steps of the method of any one of claims 10 to 14; or the processor, when executing the program, implements the steps of the method of claim 15; or the processor, when executing the program, implements the steps of the method of any one of claims 16 to 17.

23. A computer program product comprising a computer program, wherein, The computer program, when executed by the processor, implements the steps of the method of any one of claims 1 to 9; or the computer program, when executed by the processor, implements the steps of the method of any one of claims 10 to 14; or the computer program, when executed by the processor, implements the steps of the method of claim 15; or the computer program, when executed by the processor, implements the steps of the method of any one of claims 16 to 17.

24. A storage medium having stored thereon a computer program, wherein, The computer program, when executed by the processor, implements the steps of the method of any one of claims 1 to 9; or the computer program, when executed by the processor, implements the steps of the method of any one of claims 10 to 14; or the computer program, when executed by the processor, implements the steps of the method of claim 15; or the computer program, when executed by the processor, implements the steps of the method of any one of claims 16 to 17.

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