Cell selection method, communication device and storage medium

Abstract

Provided in the embodiments of the present disclosure are a cell selection method, a communication device and a storage medium. The cell selection method comprises: on the basis of whether a first cell sends a system information block (SIB1) in a first manner, determining whether to select the first cell, wherein the sending of the SIB1 in the first manner comprises at least one of the following: sending the SIB1 on the basis of a terminal request; and sending the SIB1 on the basis of an on-demand mechanism.

Description

Cell selection method, communication equipment and storage media Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a cell selection method, communication equipment, and storage medium. Background Technology

[0002] To achieve network energy efficiency, network devices may not periodically send System Information Blocks (SIBs) or may not send SIBs at all in some cases. The failure of network devices to send SIBs, or their non-periodic sending, may affect the latency of cell access or reselection for terminals.

[0003] Summary of the Invention

[0004] This disclosure provides a cell selection method, a communication device, and a storage medium.

[0005] According to a first aspect of the present disclosure, a cell selection method is provided, wherein the method is executed by a terminal, and the method includes:

[0006] Whether to select the first cell depends on whether the first cell sends SIB1 in accordance with the first method; sending SIB1 in accordance with the first method includes at least one of the following: sending SIB1 based on terminal request; sending SIB1 based on on-demand mechanism.

[0007] According to a second aspect of the present disclosure, a cell selection method is provided, wherein the method is performed by a first network device of a first cell, the method comprising: sending a Master Information Block (MIB) based on whether the first cell sends SIB1 in a first manner; the MIB is used by a terminal to determine whether the first cell sends SIB1 in the first manner; sending SIB1 in the first manner includes at least one of the following: sending SIB1 based on a terminal request; sending SIB1 based on an on-demand mechanism.

[0008] According to a third aspect of the present disclosure, a cell selection method is provided, wherein the method is performed by a second network device of a second cell, the method comprising: sending first information to a terminal; the first information being used to indicate a cell that sends SIB1 in a first manner; sending SIB1 in the first manner comprising at least one of the following: sending SIB1 based on a terminal request; sending SIB1 based on an on-demand mechanism.

[0009] According to a fourth aspect of the present disclosure, a cell selection method is provided, wherein the method is performed by a second network device of a second cell, the method comprising:

[0010] Sending second information to the terminal; the second information includes at least some information required for the terminal to access the third cell; the third cell is the cell that sends SIB1 according to the first method; the second information is used by the terminal to select the cell to access; sending SIB1 according to the first method includes at least one of the following:

[0011] SIB1 is sent based on the terminal request;

[0012] SIB1 is sent based on an on-demand mechanism.

[0013] According to a fifth aspect of the present disclosure, a terminal is provided, comprising:

[0014] The processing module is configured to determine whether to select the first cell based on whether the first cell transmits SIB1 in a first manner; transmitting SIB1 in the first manner includes at least one of the following:

[0015] SIB1 is sent based on the terminal request;

[0016] SIB1 is sent based on an on-demand mechanism.

[0017] According to a sixth aspect of the present disclosure, a first network device is provided, wherein the first network device is a network device for a first cell, and the first network device includes:

[0018] The sending module is configured to send a main information block (MIB) based on whether the first cell sends SIB1 according to a first method; the MIB is used by the terminal to determine whether the first cell sends SIB1 according to the first method; sending SIB1 according to the first method includes at least one of the following:

[0019] SIB1 is sent based on the terminal request;

[0020] SIB1 is sent based on an on-demand mechanism.

[0021] According to a seventh aspect of the present disclosure, a second network device is provided, wherein the second network device is a network device for a second cell, and the second network device includes:

[0022] The sending module is configured to send first information to the terminal; the first information is used to indicate a cell that sends SIB1 in a first manner; sending SIB1 in the first manner includes at least one of the following:

[0023] SIB1 is sent based on the terminal request;

[0024] SIB1 is sent based on an on-demand mechanism.

[0025] According to an eighth aspect of the present disclosure, a second network device is provided, wherein the second network device is a network device for a second cell, and the second network device includes:

[0026] The sending module is configured to send second information to the terminal; the second information includes at least some information required for the terminal to access a third cell; the third cell is a cell that sends SIB1 according to a first method; the second information is used by the terminal to select the cell to access; sending SIB1 according to the first method includes at least one of the following:

[0027] SIB1 is sent based on the terminal request;

[0028] SIB1 is sent based on an on-demand mechanism.

[0029] According to a ninth aspect of the present disclosure, a communication device is provided, wherein the communication device includes: one or more processors; wherein the processors are configured to invoke instructions to cause the communication device to execute the cell selection method provided by any of the technical solutions of the first to fifth aspects.

[0030] According to a tenth aspect of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions that, when executed on a communication device, cause the communication device to perform a cell selection method provided by any one of the first to fifth aspects.

[0031] The technical solution provided in this disclosure allows the terminal to determine whether to select a first cell based on whether the first cell transmits SIB1 according to the first method. This is equivalent to adding the factor of whether the first cell transmits SIB1 according to the first method as a reference when the terminal selects a serving cell or a cell to camp on. For example, if the terminal is establishing or re-establishing an RRC connection with the selected cell, it can choose not to select a cell that transmits SIB1 according to the first method, thereby reducing latency.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the embodiments of this disclosure. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of embodiments of this disclosure.

[0034] Figure 1A is a schematic diagram of the architecture of a communication system according to an exemplary embodiment;

[0035] Figure 1B is a schematic diagram illustrating a MIB and SIB according to an exemplary embodiment;

[0036] Figure 1C is a diagram illustrating the resource location relationship between a Synchronization Signal and (Physical Broadcast Channel, PBCH) block (SSB) and a Control Resource Set (CORESET) according to an exemplary embodiment.

[0037] Figure 1D is an interactive schematic diagram of System Information (SI) according to an exemplary embodiment;

[0038] Figure 2A is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0039] Figure 2B is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0040] Figure 2C is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0041] Figure 3A is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0042] Figure 3B is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0043] Figure 3C is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0044] Figure 4A is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0045] Figure 4B is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0046] Figure 4C is a flowchart illustrating a cell selection method according to an exemplary embodiment;

[0047] Figure 5A is a schematic diagram of the structure of a terminal according to an exemplary embodiment;

[0048] Figure 5B is a schematic diagram of the structure of a first network device according to an exemplary embodiment;

[0049] Figure 5C is a schematic diagram of the structure of a second network device according to an exemplary embodiment;

[0050] Figure 5D is a schematic diagram of the structure of a second network device according to an exemplary embodiment;

[0051] Figure 6A is a timing diagram illustrating an RRC reconstruction according to an exemplary embodiment;

[0052] Figure 6B is a schematic diagram illustrating a MIB according to an exemplary embodiment;

[0053] Figure 6C is a schematic diagram illustrating a serving cell common configuration SIB of an SIB according to an exemplary embodiment;

[0054] Figure 6D is a schematic diagram illustrating an SIB1 according to an exemplary embodiment;

[0055] Figure 7A is a schematic diagram of the structure of a communication device according to an exemplary embodiment;

[0056] Figure 7B is a schematic diagram of the structure of a chip according to an exemplary embodiment. Detailed Implementation

[0057] This disclosure provides a cell selection method, communication equipment, communication system, and storage medium.

[0058] The first aspect provides a cell selection method, executed by a terminal, the method including:

[0059] Whether to select the first cell depends on whether the first cell sends SIB1 in accordance with the first method; sending SIB1 in accordance with the first method includes at least one of the following: sending SIB1 based on terminal request; sending SIB1 based on on-demand mechanism.

[0060] Based on the above scheme, the terminal determines whether to select the first cell based on whether the first cell transmits SIB1 according to the first method. This is equivalent to adding the factor of whether the first cell transmits SIB1 according to the first method to the terminal's selection of the serving cell or the cell to be camped. If the terminal needs to establish or rebuild an RRC connection with the selected cell, it can choose not to select a cell that transmits SIB1 according to the first method, thereby reducing latency.

[0061] In some embodiments of the first aspect, determining whether to select a first cell based on whether the first cell transmits SIB1 in a first manner includes: satisfying a first condition and determining whether to select a first cell based on whether the first cell transmits SIB1 in a first manner.

[0062] Based on the above scheme, when the first condition is met, the selection of the first cell is determined by whether the first cell sends SIB1 in the first manner, rather than the selection of all cells is determined by whether the first cell sends SIB1 in the first manner. This makes it possible for the terminal to access or camp on the cell that sends SIB1 in the first manner.

[0063] In some embodiments of the first aspect, the first condition includes at least one of the following:

[0064] The terminal experienced a radio link failure (RLF).

[0065] The terminal failed to perform a handover (HOF).

[0066] Based on the above scheme, optional implementation methods for the first condition are listed. The specific implementation is not limited to the above methods. Any scenario in which any terminal urgently needs to establish or rebuild a Radio Resource Control (RRC) connection with the cell can be used as the first condition.

[0067] In some embodiments of the first aspect, the method further includes:

[0068] Receive first information from the second cell; the first information is used by the terminal to determine whether the first cell sends SIB1 in the first manner.

[0069] Based on the first information, determine whether the first cell sends SIB1 in the first manner.

[0070] Based on the above scheme, the terminal can determine whether the first cell sends SIB1 in the first manner based on the first information received in the current cell (i.e., the current serving cell or the current camping cell).

[0071] In some embodiments of the first aspect, the first information includes at least one of the following:

[0072] Physical cell identification (PCI) of cells that do not send SIB1;

[0073] Frequency identifier.

[0074] Based on the above scheme, the first information includes PCI, which enables the terminal to determine whether a cell is a cell that sends SIBs in accordance with the first method when it detects the MIB of a certain cell.

[0075] In some embodiments of the first aspect, the method further includes:

[0076] Receive the MIB sent by the first cell;

[0077] The MIB determines whether the first cell should send SIB1 according to the first method.

[0078] Based on the above scheme, the terminal can determine whether the first cell sends SIB1 in the first manner according to the MIB received by the first cell. In this way, there is no need for other cells to send information to the first cell for the terminal to determine whether the first cell sends SIB1 in the first manner, thereby saving information interaction between the first cell and other cells and reducing the overhead of signaling interaction between cells.

[0079] In some embodiments of the first aspect, determining whether the first cell transmits SIB1 according to the first method based on the MIB includes:

[0080] Based on the MIB verification method, determine whether the first cell sends SIB1 according to the first method;

[0081] Based on whether the MIB contains the first bit, determine whether the first cell sends SIB1 in the first manner;

[0082] Based on the indication content of the second bit contained in the MIB, determine whether the first cell sends SIB1 in the first manner.

[0083] The above scheme provides a specific implementation for determining whether the first cell sends SIB1 in the first manner based on the MIB of the first cell.

[0084] In some embodiments of the first aspect, determining whether the first cell sends SIB1 according to the first method based on the MIB verification method includes at least one of the following:

[0085] Based on the verification algorithm used by the MIB, determine whether the first cell sends SIB1 in the first manner;

[0086] Based on the verification mask used by the MIB, determine whether the first cell sends SIB1 in the first manner.

[0087] The above scheme provides a specific method for determining whether the first cell sends SIB1 according to the first method through the MIB verification method, and it has the characteristics of being easy to implement.

[0088] In some embodiments of the first aspect, determining whether to select a first cell based on whether the first cell transmits SIB1 in a first manner includes at least one of the following:

[0089] The first cell sends SIB1 according to the first method, confirming that the first cell is not selected;

[0090] The first cell sends SIB1 according to the second method to confirm the selection of the first cell; the second method is different from the first method.

[0091] The above scheme gives the terminal priority to select the cell that sends SIB1 according to the second method, thereby reducing the delay of RRC connection establishment or reconstruction.

[0092] In some embodiments of the first aspect, the method further includes: receiving second information from a second cell; the second information includes at least some information required for the terminal to access a third cell; the third cell is a cell that transmits SIB1 in accordance with the first method;

[0093] Whether to select the first cell is determined based on whether the first cell sends SIB1 in the first manner, including at least one of the following:

[0094] The first cell sends SIB1 according to the first method and the second information includes all the information required to access or camp on the first cell, and then determines to select the first cell;

[0095] If the second information does not contain the SIB1 of the first cell and the first cell sends the SIB1 in the first manner, it is determined that the first cell will not be selected.

[0096] The first cell sends SIB1 according to the first method, and the second information includes some information required to access or camp on the first cell, and determines that the first cell is not selected.

[0097] The above scheme specifically defines how the terminal selects a cell by combining the second information, and it is easy to implement.

[0098] In some embodiments of the first aspect, the information required to access or camp on the first cell includes at least one of the following:

[0099] SIB1 of the first community;

[0100] Criteria for selecting the first cell.

[0101] The above scheme provides examples of the information required to access or stay in the first cell, but the actual implementation is not limited to the above examples.

[0102] The second aspect provides a cell selection method, wherein the method is performed by a first network device in a first cell, the method comprising:

[0103] Based on whether the first cell transmits SIB1 according to the first method, a main information block (MIB) is sent; the MIB is used by the terminal to determine whether the first cell transmits SIB1 according to the first method; transmitting SIB1 according to the first method includes at least one of the following:

[0104] SIB1 is sent based on the terminal request;

[0105] SIB1 is sent based on an on-demand mechanism.

[0106] In some embodiments of the second aspect, the method further includes:

[0107] The verification method of MIB is determined based on whether the first cell sends SIB1 in the first manner;

[0108] Determine whether the MIB contains the first bit based on whether the first cell sends SIB1 in the first manner;

[0109] Based on whether the first cell sends SIB1 in the first manner, determine the indication content of the second bit contained in the MIB.

[0110] In some embodiments of the second aspect, the verification method of the MIB is determined based on whether the first cell sends SIB1 in the first manner, including at least one of the following:

[0111] The MIB verification algorithm is determined based on whether the first cell sends SIB1 in the first manner.

[0112] The MIB check mask is determined based on whether the first cell sends SIB1 in the first manner.

[0113] A third aspect provides a cell selection method, wherein the selection is performed by a second network device in a second cell, the method comprising:

[0114] Sending first information to the terminal; the first information is used to indicate a cell that sends SIB1 in a first manner; sending SIB1 in the first manner includes at least one of the following:

[0115] SIB1 is sent based on the terminal request;

[0116] SIB1 is sent based on an on-demand mechanism.

[0117] In some embodiments of the third aspect, the first information includes at least one of the following:

[0118] The Physical Cell Identifier (PCI) of cells that do not send SIB1;

[0119] Frequency identifier.

[0120] The fourth aspect provides a cell selection method, wherein the selection is performed by a second network device in the second cell, the method comprising:

[0121] Sending second information to the terminal; the second information includes at least some information required for the terminal to access the third cell; the third cell is the cell that sends SIB1 according to the first method; the second information is used by the terminal to select the cell to access; sending SIB1 according to the first method includes at least one of the following:

[0122] SIB1 is sent based on the terminal request;

[0123] SIB1 is sent based on an on-demand mechanism.

[0124] In some embodiments of the third aspect, the second information includes at least one of the following:

[0125] Signage information for the third residential area;

[0126] SIB1 of the third community;

[0127] Criteria for selecting a third cell.

[0128] In some embodiments of the third aspect, the identification information of the third cell includes at least one of the following:

[0129] The physical community signage for the third community;

[0130] Frequency information for the third cell.

[0131] The fifth aspect provides a terminal, wherein:

[0132] The processing module is configured to determine whether to select the first cell based on whether the first cell transmits SIB1 in a first manner; transmitting SIB1 in the first manner includes at least one of the following:

[0133] SIB1 is sent based on the terminal request;

[0134] SIB1 is sent based on an on-demand mechanism.

[0135] A sixth aspect provides a first network device, wherein the first network device is a network device for a first cell, and the first network device includes:

[0136] The sending module is configured to send a main information block (MIB) based on whether the first cell sends SIB1 according to a first method; the MIB is used by the terminal to determine whether the first cell sends SIB1 according to the first method; sending SIB1 according to the first method includes at least one of the following:

[0137] SIB1 is sent based on the terminal request;

[0138] SIB1 is sent based on an on-demand mechanism.

[0139] A seventh aspect provides a second network device, wherein the second network device is a network device for a second cell, and the second network device includes:

[0140] The sending module is configured to send first information to the terminal; the first information is used to indicate a cell that sends SIB1 in a first manner; sending SIB1 in the first manner includes at least one of the following:

[0141] SIB1 is sent based on the terminal request;

[0142] SIB1 is sent based on an on-demand mechanism.

[0143] The eighth aspect provides a second network device, wherein the second network device is a network device for a second cell, and the second network device includes:

[0144] The sending module is configured to send second information to the terminal; the second information includes at least some information required for the terminal to access a third cell; the third cell is a cell that sends SIB1 according to a first method; the second information is used by the terminal to select the cell to access; sending SIB1 according to the first method includes at least one of the following:

[0145] SIB1 is sent based on the terminal request;

[0146] SIB1 is sent based on an on-demand mechanism.

[0147] Ninthly, embodiments of this disclosure provide a communication device, the communication device comprising: one or more processors;

[0148] The processor is used to invoke instructions to cause the communication device to execute the cell selection method described in the optional implementations of the first to fourth aspects.

[0149] In a tenth aspect, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the cell selection method described in the optional implementations of the first to second aspects.

[0150] In one aspect, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to perform the cell selection method described in the optional implementations of the first to fourth aspects.

[0151] In a twelfth aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the cell selection method described in the optional implementations of the first to fourth aspects.

[0152] It is understood that the aforementioned terminals, network devices, communication systems, program products, and computer programs are all used to execute the methods provided in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0153] This disclosure provides a cell selection method, communication equipment, communication system, and storage medium. The embodiments of this disclosure are not exhaustive, but merely illustrative of some embodiments, and are not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a scheme after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0154] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0155] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0156] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the aforementioned," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0157] In the embodiments disclosed herein, "multiple" refers to two or more.

[0158] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0159] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "A in one case, B in another", etc., may include the following technical solutions depending on the situation: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, C, etc.

[0160] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0161] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. As another example, if the object being described is "information", then "first type of information" and "second type of information" can be the same information or different information, and their content can be the same or different.

[0162] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0163] In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “when…”, “when…”, “if…”, etc. can be used interchangeably.

[0164] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0165] In some embodiments, devices, etc., can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0166] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0167] In some embodiments, the terms "access network device (AN device)," "radio access network device (RAN device)," "base station (BS)," "radio base station," "fixed station," "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "antenna panel," "antenna array," "cell," "macro cell," "small cell," "femto cell," "pico cell," "sector," "cell group," "serving cell," "carrier," "component carrier," and "bandwidth part (BWP)" can be used interchangeably.

[0168] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", and "client" can be used interchangeably.

[0169] In some embodiments, access network devices, core network devices, or network devices can be replaced by terminals. For example, embodiments of this disclosure can also be applied to structures where communication between access network devices, core network devices, or network devices and terminals is replaced by communication between multiple terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel, and uplink link, downlink, etc., can be replaced with sidelink link.

[0170] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0171] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0172] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0173] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0174] Figure 1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0175] As shown in Figure 1A, the communication system 100 includes a terminal 101 and a network device 102. The network device 102 may include access network devices and / or core network devices.

[0176] In some embodiments, terminal 101 includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0177] In some embodiments, the terminal is also referred to as user equipment (UE).

[0178] In some embodiments, the access network device may be a node or device that connects a terminal to a wireless network. The access network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system.

[0179] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0180] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0181] In some embodiments, the core network equipment can be a single device, including a first network element, or it can be multiple devices or a group of devices, each including a first network element. Network elements can be virtual or physical. The core network includes, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0182] It is understood that the communication system described in the embodiments of this disclosure is for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and does not constitute a limitation on the technical solutions provided in the embodiments of this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this disclosure are also applicable to similar technical problems.

[0183] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1A, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1A are illustrative. The communication system may include all or some of the main bodies in FIG1A, or it may include other main bodies outside of FIG1A. The number and form of each main body are arbitrary. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0184] The embodiments disclosed herein can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems utilizing configuration methods of other resources, and next-generation systems extended from them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE and NR).

[0185] In some cases, IoT devices are often powered by traditional batteries with limited lifespans, negatively impacting user experience. The number of IoT devices is expected to grow astronomically, pushing maintenance costs, including labor and battery expenses, to unprecedented levels. Billions of traditional batteries are discarded annually, with only a fraction being effectively recycled, causing harmful impacts on the Earth's ecosystem. Maintaining IoT networks and replacing batteries can be extremely challenging under extreme environmental conditions. In this regard, battery-free IoT communication has been proposed, which can improve network performance and sustainability and expand application scenarios. Furthermore, battery-free communication is more environmentally friendly and safer for children and the elderly. By eliminating traditional batteries, device size and cost can be significantly reduced, paving the way for a variety of new applications.

[0186] In some embodiments, various Low Power Wide Area (LPWA) technologies, such as Machine Type Communication (MTC), Narrow Band Internet of Things (NB-IoT), and Reduced Capability (RedCap), have been developed to meet the growing demands of vertical industries. These LPWA technologies achieve low cost, low power consumption, and massive connectivity, satisfying the requirements of many applications. However, many use cases and applications remain unresolved. First, battery-powered devices are unsuitable, for example, under extreme environmental conditions (e.g., high voltage, extremely high / low temperatures, humid environments). Second, maintenance-free devices are required (e.g., conventional batteries that do not require replacement). Finally, ultra-low complexity, very small device size / form factor (e.g., thickness in mm), and longer lifespan are required. Ambient Powered IoT is a promising technology that can address these unmet needs. An ambient powered IoT device is an IoT device powered by energy harvesting, without batteries or with limited energy storage capacity (e.g., using capacitors), providing energy by harvesting radio waves, light, motion, heat, or any other suitable power source.

[0187] Energy harvested from the environment can power data transmission and wireless communication at sensing nodes. Current mainstream low-power IoT communication chips (such as BLE, LoRa, and NB-IoT) consume tens or even hundreds of milliwatts of power for transmission and reception, while environmental energy harvesting yields only microwatts, insufficient to power these types of nodes. Therefore, a new wireless communication technology is needed to reduce communication energy consumption to tens or even below ten microwatts. Currently, the mainstream approach uses backscatter communication technology. Backscatter communication is one of the key technologies for building a green, energy-efficient, low-cost, and flexibly deployable future IoT, and is an important means of realizing "intelligent interconnection of everything." One possible approach is backscatter transmission technology.

[0188] The content broadcast by a cell in the NR system may include: MIB, SIB1, and other system information (OSI). The RMSI may include at least SIB1.

[0189] In some embodiments, the Remaining Minimum System Information (RMSI) may include MIB and SIB1.

[0190] As shown in Figure 1B, the MIB may include configuration information for SIB1. For example, the MIB includes configuration information for scheduling resources. These scheduling resources may include Physical Downlink Control Channel (PDCCH) resources. Downlink Control Information (DCI) transmitted on this PUCCH resource is used to schedule SIB1. SIB1 can also be used to configure OSI scheduling resources. In some embodiments, SIB1 may also include information required for accessing the corresponding cell and Unified Access Control (UAC) parameters, etc.

[0191] For example, SIB2 may include cell reselection information. This cell reselection information is primarily related to the serving cell.

[0192] For example, SIB3 may include reselection information related to the current service frequency and co-frequency neighboring cells.

[0193] For example, SIB4 may include reselection information related to other NR frequencies and inter-frequency neighboring cells.

[0194] For example, SIB5 may include Evolved-Universal-Terrestrial Radio Access (E-UTRA) frequencies and E-UTRA neighbor cell reselection information.

[0195] For example, SIB6 may include a primary notification from the Emergency Telecommunications Warning System (ETWS).

[0196] For example, SIB7 may include ETWS secondary notifications.

[0197] For example, SIB8 may include Commercial Mobile Alert System (CMAS) alarm notifications.

[0198] For example, SIB9 may include information related to the positioning system time and world time.

[0199] In some embodiments, SIB1 may include: cell selection configuration, cell access configuration, OSI scheduling configuration and / or cell common configuration, access control related configuration parameters and / or cell capability related configuration parameters.

[0200] In some embodiments, the control resource set (CORESET) of the RMSI is configured by the MIB. There are at least three resource location relationships between the RMSI's CORESET and the SSB. The control resource set includes one or more PDCCH resources. PDSCHs can be used to send SIBs.

[0201] The terminal can obtain the resource location of the PDCCH from the PBCH in the SSB, and further listen for DCI based on the resource location of the PDCCH. Based on the monitored DCI scheduling, it receives the RMSI.

[0202] Figure 1C shows the diagrams of the CORESET and SSB of the communication system under different multiplexing modes.

[0203] Figure 1 is used for Time Division Multiplexing (TDM) communication systems. Figure 2 is used for both TDM and Frequency Division Multiplexing (FDM) communication systems. Figure 3 is used for FDM communication systems.

[0204] In some embodiments, network energy saving (NES) is achieved by reducing the amount of system information sent by the network side.

[0205] In some embodiments, the network device requests other SIBs besides MIB and SIB1 on demand. That is, when the terminal needs other SIBs, the terminal sends a System Information (SI) request to the network device, and the network device determines whether to broadcast the corresponding SIB after receiving the SI request.

[0206] SI requests may include: SI requests based on message 1 (Msg1) of the random access request and / or SI requests based on message 3 of the random access request.

[0207] In some embodiments, Msg1-based SI requests may use reserved preamble and / or random access channel (RACH) resources.

[0208] In some embodiments, Msg3-based SI requests do not require reserved RACH resources and a random access preamble.

[0209] SI requests based on Msg3 can be defined as RRCSystemInfoRequest messages (Msg3).

[0210] The terminal determines whether to use an SI request based on Msg1 or Msg3 by reading system information.

[0211] If the base station provides configuration information for the SI request in the system information (SIB1) (e.g., si-Request-Config), then the SI request based on Msg1 is used; otherwise, the SI request based on Msg3 is used.

[0212] After receiving the SI request, the base station can send an SI request confirmation to the terminal.

[0213] After receiving confirmation of the SI request, the terminal receives the SI within the current modification period. The terminal receives the SI until the modification period ends or until it knows that the SI has been received. If RACH fails during the SI request process, the subsequent behavior of the UE depends on the UE implementation.

[0214] Figure 1D illustrates a method for information exchange between a network device and a terminal, which may include:

[0215] Network devices broadcast MIB;

[0216] Network devices broadcast SIB1;

[0217] The terminal sends an SI request;

[0218] Network devices send system information.

[0219] Currently, when a terminal experiences a radio link failure or handover failure, it selects a suitable target cell for access and initiates an RRC connection re-establishment process. During this process, the terminal needs to obtain the parameters configured in SIB1 related to the target cell. However, if the target cell does not send SIB1 or sends it only on demand, it may lead to problems such as RRC connection re-establishment failure (e.g., if the RRC connection re-establishment timer expires before completion) or significant RRC connection re-establishment latency.

[0220] In view of this, as shown in FIG2A, this embodiment provides a cell selection method, which can be executed by the communication system shown in FIG1A. The method may include:

[0221] S2101: The network device sends the first information to the terminal.

[0222] In some embodiments, the network device may be an access network device such as a base station.

[0223] In some embodiments, the network device broadcasts, multicasts, or unicasts first information.

[0224] In some embodiments, the network device of the second cell sends the first information.

[0225] In some embodiments, the second cell may be the cell where the terminal is currently camped or the cell where the terminal was last camped.

[0226] In some embodiments, the second cell may be a neighboring cell of the first cell.

[0227] In some embodiments, for carrier aggregation and / or dual connectivity scenarios, the second cell may be the primary cell and the first cell may be the secondary cell; or, the second cell may be both the primary and secondary cell and the first cell may be a conventional secondary cell.

[0228] In some embodiments, the first information is used by the terminal to determine whether the first cell sends SIB1 in a first manner.

[0229] In some embodiments, the first information directly or indirectly indicates the cell that transmits SIB1 in a first manner.

[0230] In some embodiments, the first information directly or indirectly indicates a cell that does not transmit SIB1 in accordance with the first method.

[0231] In some embodiments, the first information may include a cell list. The cell list includes one or more cells that transmit SIB1 in a first manner. For example, the cell list may be used to determine a blacklist of cells for which the terminal will not select access.

[0232] In some embodiments, the first information may include a cell list. This cell list includes one or more cells that do not transmit SIB1 in the first manner. For example, the cell list may be used to determine a cell whitelist for the terminal to select access cells.

[0233] In some embodiments, the first information may include a cell identifier.

[0234] In some embodiments, the first information may include the physical cell identifier of the physical layer and / or the high-level cell identifier of the higher layer. A higher layer is any layer above the physical layer.

[0235] If the cell identifier included in the first information is a physical layer cell identifier, then when the terminal listens to the MIB of the first cell, it knows the cell identifier of the first cell based on the MIB. In this way, the terminal can determine whether the first cell is the cell that sends SIB1 in the first manner based on the MIB received from the first cell.

[0236] In some embodiments, the first information includes at least one of the following:

[0237] The Physical Cell Identifier (PCI) of cells that do not send SIB1;

[0238] Frequency identifier.

[0239] In some embodiments, the frequency identifier may include, but is not limited to, at least one of the following:

[0240] Frequency Layer identifier;

[0241] Frequency band identifier;

[0242] Carrier identifier;

[0243] Frequency point identification, etc.

[0244] When a terminal selects a cell for access, it can find the frequency used by the cell by listening to the SSB and / or SIB of the corresponding cell. Then, based on the MIB, a cell can be uniquely identified, and thus, it can be uniquely identified whether the first cell is a cell that sends SIB1 in the first way.

[0245] In some embodiments, if the cell identifier included in the first information is a physical cell identifier, the terminal can determine whether the first cell sends SIB1 in the first manner by performing only physical layer signal processing, which further simplifies the terminal operation and saves the terminal's power consumption.

[0246] In some embodiments, if the first information includes configuration information for the terminal to request SIB1 from the first cell, then the first information can be considered to implicitly instruct the first cell to send SIB1 in a first manner. In some embodiments, the SI request for requesting SIB may include, but is not limited to, the aforementioned SI request based on Msg1, the SI request based on Msg3, and / or the request based on the Wake Up Signal (WUS).

[0247] In some embodiments, the first approach includes, but is limited to, at least one of the following:

[0248] SIB1 is sent based on the terminal request;

[0249] SIB1 is sent based on an on-demand mechanism;

[0250] SIB1 is sent non-periodically.

[0251] For example, sending SIB1 based on an on-demand mechanism may include, but is not limited to, at least one of the following:

[0252] The cell sends SIB1 according to its own needs. For example, when the cell wants to establish downlink synchronization with the terminal or rebuild the downlink connection, it can be considered to have a need, so it can actively broadcast SIB1.

[0253] The cell sends SIBs according to the needs of the terminals. For example, when a terminal needs to obtain SIB1, it can send a request to the network device. In this way, the network device will know that the terminal needs to obtain SIB1 and then determine whether to broadcast SIB1.

[0254] In some embodiments, non-periodic transmission of SIB1 may include: not transmitting SIB1 according to the semi-static configuration period, and / or not transmitting SIB1 according to the periodic configuration or the period corresponding to the dynamic configuration. That is, whether the first cell transmits SIB1 according to the first method may include two states: the first cell periodically transmitting SIB1 and the first cell non-periodic transmission of SIB1.

[0255] In some embodiments, if the first cell does not transmit SIB1 according to the first method, it can be understood that the terminal transmits SIB1 according to the second method. If the first cell transmits SIB1 according to the second method, then the first cell transmits SIB1 periodically.

[0256] S2102: The terminal determines whether to select the first cell.

[0257] In some embodiments, the terminal determines whether to select the first cell according to the cell selection process.

[0258] In some embodiments, the cell selection process may include, but is not limited to, at least one of the following:

[0259] A: Initial cell selection process:

[0260] The initial cell selection process does not require any prior knowledge of the radio channels of the UTRA carrier. The UE searches all RF channels within the UTRA band. On each carrier, the UE needs to search for the strongest cell and then select a suitable cell that conforms to the PLMN.

[0261] B: Cell selection based on stored information:

[0262] Cell selection based on stored information requires the terminal to have stored carrier frequency information and cell parameters such as scrambling codes for some candidate cells. This information is obtained from previous measurement and control information elements. Once the terminal finds a suitable cell among these cells, it selects that cell. If no suitable cell is found, the initial cell selection process is initiated.

[0263] In some embodiments, the terminal determines whether to select the first cell based on whether the first cell transmits SIB1 in a first manner. For example, if the first cell transmits SIB1 in the first manner, it is determined that the first cell is not selected. Alternatively, if the first cell transmits SIB1 in a second manner, it is determined that the first cell is selected; the second manner differs from the first manner.

[0264] In some embodiments, the terminal determines whether to select the first cell as the target cell for initial cell access, cell handover, and / or cell reselection based on whether the first cell sends SIB1 in a first manner.

[0265] In some embodiments, the terminal determines whether the first cell should send SIB1 in accordance with the first method based on the first information.

[0266] In some embodiments, the terminal can determine whether the first cell transmits SIB1 according to the first method based on the first information and the MIB of the first cell. If the first information indicates that the first cell transmits SIB1 according to the first method, but the MIB of the first cell currently shows that the first cell periodically broadcasts SIB1, it can be determined that the first cell is currently not transmitting SIB1 according to the first method. If the first information indicates that the first cell does not transmit SIB1 according to the first method, but the MIB of the first cell currently does not periodically broadcast SIB1, it can be determined that the first cell is currently not transmitting SIB1 according to the first method. That is, when the terminal determines whether the first cell transmits SIB1 according to the first method based on both the first information and the MIB, the MIB broadcast by the first cell has a higher priority than the first information.

[0267] In some embodiments, the MIB of the first cell explicitly indicates whether the first cell transmits SIB1 in a first manner. For example, the MIB of the first cell has an indication bit indicating whether the first cell transmits SIB1 in a first manner.

[0268] In some embodiments, the MIB of the first cell implicitly indicates whether the first cell transmits SIB1 in a first manner. For example, if the first cell does not transmit SIB1 in the first manner, then the MIB may include PUCCH resources containing the scheduling information (e.g., DCI) of SIB1. Alternatively, if the first cell transmits SIB1 in the first manner, then the MIB may not contain PUCCH resources containing the scheduling information (e.g., DCI) of SIB1.

[0269] In some embodiments, the terminal can also determine whether the first cell transmits SIB1 according to the first method based on the verification method of the first cell's MIB. For example, when the first cell transmits SIB1 according to the first method or the second method, the verification algorithm used by the first cell's MIB is different, or the verification mask is different. The verification algorithm may include, but is not limited to, the Cyclic Redundancy Check algorithm.

[0270] In some embodiments, if a first condition is met, it is determined whether to select a first cell based on whether the first cell sends SIB1 in a first manner.

[0271] In some embodiments, satisfying the first condition may include: the terminal re-establishing the RRC connection.

[0272] In some embodiments, satisfying the first condition may further include: the terminal's wireless link failing.

[0273] In some embodiments, satisfying the first condition may further include: the terminal's cell handover failed.

[0274] In some embodiments, if the first condition is not met, the terminal may also determine whether to select the first cell by sending SIB1 in the first manner.

[0275] In other embodiments, if the first condition is not met, the terminal determines whether to select the first cell in a conventional manner. For example, the terminal ignores whether the first cell sends SIB1 to determine whether to select the first cell in the first manner.

[0276] If the initial access upon powering on of the terminal is not the reconstruction of the terminal's RRC connection, the terminal may not be in a hurry to quickly establish an RRC connection with the network device for service transmission. In this case, in order for more terminals to choose to access the energy-saving cell that sends SIB1 in the first manner, the terminal can ignore whether the first cell sends SIB1 in the first manner, and instead determine whether to select the first cell based on the signal quality of the first cell and other factors.

[0277] In some embodiments, if the terminal's RRC connection has been disconnected for some time due to a radio link failure and / or cell handover failure, the terminal may be eager to re-establish the RRC connection for service transmission. To reduce the delay in RRC connection re-establishment and minimize re-establishment failures caused by the inability to complete the re-establishment within the specified time, the first condition can be considered met, and it is necessary to determine whether to select a first cell based on whether the first cell sends SIB1 according to the first method. The specified time can be determined by the operation of timers T301 and / or T311. For example, the terminal starts T311 after a radio link failure or cell handover failure, and performs cell selection during the operation of T311, and accesses (i.e., camps) the selected cell. If T311 times out and the terminal has not yet completed RRC connection re-establishment in the selected cell, it indicates that the terminal's RRC connection re-establishment has failed. If T301 times out and the terminal has not yet completed RRC connection re-establishment in the selected cell, it indicates that the terminal's RRC connection re-establishment has failed. T301 is started after the terminal finds a suitable cell. If the terminal has not yet connected to the selected suitable cell by T301, it indicates that the RRC connection reconstruction has failed. If the RRC connection reconstruction fails, the terminal enters the idle state.

[0278] In some embodiments, S2102 may include at least one of the following:

[0279] The first information instructs the first cell to send SIB1 according to the first method, confirming that the first cell is not selected;

[0280] The first information indicates that the first cell does not send SIB1 according to the first method, and the first cell is selected.

[0281] The first information instructs the first cell to send SIB1 according to the second method to confirm the selection of the first cell;

[0282] The first message indicates that the first cell will not send SIB1 according to the second method, confirming that the first cell will not be selected.

[0283] For example, if the terminal selects the first cell, it means that the first cell is selected as the target cell. If the terminal does not select the first cell, it means that the terminal does not select the first cell as the target cell.

[0284] In some embodiments, after selecting a target cell, the terminal can access the target cell based on a cell handover procedure, a cell reselection procedure, an RRC reconstruction procedure, and / or an initial access procedure.

[0285] In view of this, as shown in FIG2B, this embodiment provides a cell selection method, which can be executed by the communication system shown in FIG1A. The method may include:

[0286] S2201: The network device sends the MIB of the first cell to the terminal.

[0287] In some embodiments, the network device may be an access network device such as a base station.

[0288] In some embodiments, the network equipment of the first cell broadcasts the MIB of the first cell.

[0289] In some embodiments, the MIB of the first cell directly or indirectly indicates whether the first cell sends SIB1 in a first manner.

[0290] In some embodiments, the verification method of MIB is determined based on whether the first cell sends SIB1 in a first manner.

[0291] For example, different verification methods correspond to different verification algorithms and / or verification parameters. For example,

[0292] Determine whether the MIB contains the first bit based on whether the first cell sends SIB1 in the first manner;

[0293] Based on whether the first cell sends SIB1 in the first manner, determine the indication content of the second bit contained in the MIB.

[0294] In some embodiments, the first approach includes, but is limited to, at least one of the following:

[0295] SIB1 is sent based on the terminal request;

[0296] SIB1 is sent based on an on-demand mechanism;

[0297] SIB1 is sent non-periodically.

[0298] For example, sending SIB1 based on an on-demand mechanism may include, but is not limited to, at least one of the following:

[0299] The cell sends SIB1 according to its own needs. For example, when the cell wants to establish downlink synchronization with the terminal or rebuild the downlink connection, it can be considered to have a need, so it can actively broadcast SIB1.

[0300] The cell sends SIBs according to the needs of the terminals. For example, when a terminal needs to obtain SIB1, it can send a request to the network device. In this way, the network device will know that the terminal needs to obtain SIB1 and then determine whether to broadcast SIB1.

[0301] In some embodiments, non-periodic transmission of SIB1 may include: not transmitting SIB1 according to the semi-static configuration period, and / or not transmitting SIB1 according to the periodic configuration or the period corresponding to the dynamic configuration. That is, whether the first cell transmits SIB1 according to the first method may include two states: the first cell periodically transmitting SIB1 and the first cell non-periodic transmission of SIB1.

[0302] In some embodiments, if the first cell does not transmit SIB1 according to the first method, it can be understood that the terminal transmits SIB1 according to the second method. If the first cell transmits SIB1 according to the second method, then the first cell transmits SIB1 periodically.

[0303] In some embodiments, Figure 6B shows a schematic diagram of a MIB. Exemplarily, the MIB may include a frame number, subcarrier spacing, the location of demodulation reference signal type A, PDCCH resources for configuring SIB1, cell prohibition indicator and / or co-frequency cell reselection information, etc.

[0304] In some embodiments, Figure 6C shows a schematic diagram of an SIB1. Exemplarily, the SIB1 may include cell selection information, cell access-related information, unified access control type selection assistance information, etc. The cell selection information can be used for cell selection by the terminal.

[0305] In some embodiments, Figure 6D shows a schematic diagram of a Serving Cell Config Common SIB (ServingCelConfigCommonSIB) included in an SIB1. For example, the ServingCelConfigCommonSIB may include common configurations for various cells, such as common channel configurations, common channel measurement configurations, etc.

[0306] S2202: The terminal determines whether to select the first cell.

[0307] In some embodiments, the terminal determines whether to select the first cell based on whether the first cell sends SIB1 in a first manner.

[0308] In some embodiments, the terminal determines whether to select the first cell as the target cell for initial cell access, cell handover, and / or cell reselection based on whether the first cell sends SIB1 in a first manner.

[0309] In some embodiments, the terminal determines whether the first cell should send SIB1 in a first manner based on the MIB of the first cell.

[0310] For example, the first cell periodically broadcasts its MIB. The terminal listens to the SSB of the first cell through cell search or frequency scanning, and then uses the SSB as a basis for its actions. The PBCH in the SSB carries the MIB.

[0311] In some embodiments, the method of MIB verification determines whether the first cell sends SIB1 according to the first method.

[0312] For example, if the first cell transmits SIB1 according to the first method, then the MIB of the first cell uses the first verification method. If the first cell does not transmit SIB1 according to the first method, then the MIB of the first cell uses the second verification method. In this case, if the terminal successfully verifies the MIB of the first cell using the first verification method, it is determined that the first cell transmits SIB1 according to the first method; otherwise, it is determined that the first cell does not transmit SIB1 according to the first method. Alternatively, if the terminal successfully verifies the MIB of the first cell using the second verification method, it is determined that the first cell does not transmit SIB1 according to the first method; otherwise, it is determined that the first cell transmits SIB1 according to the first method.

[0313] In some embodiments, it is determined whether the first cell transmits SIB1 in a first manner based on the verification algorithm used by the MIB. For example, different verification algorithms may correspond to different polynomials that generate the CRC.

[0314] In some embodiments, it is determined whether the first cell transmits SIB1 in a first manner based on the verification mask used by the MIB.

[0315] For example, taking CRC as an example, the check mask can be (CRC mask). For example, the information bits of the MIB and the bit sequence generated based on the polynomial are XORed to obtain a CRC of a specified length, and the specified length CRC and the check mask are XORed and appended to the back end of the MIB, which is then uniformly sent to the terminal by the network device.

[0316] In some embodiments, it is determined whether the first cell transmits SIB1 in a first manner based on whether the MIB contains the first bit.

[0317] For example, an unused free bit and / or reserved bit in the MIB can be used as the first bit. There can be one or more first bits. Different values ​​of the first bit represent whether the first cell transmits SIB1 according to the first method.

[0318] Based on the indication content of the second bit contained in the MIB, determine whether the first cell sends SIB1 in the first manner.

[0319] In some embodiments, a new bit may be added to the MIB or an idle bit in the MIB may be used as a second bit. There may be one or more second bits. The indication content of the second bit corresponds to its value. Based on the indication content of the second bit, it is determined whether the first cell transmits SIB1 according to the first method.

[0320] In some embodiments, when the first cell transmits SIB1 in a first manner, it is determined that the first cell is not selected.

[0321] In some embodiments, when the first cell sends SIB1 in a second manner, it is determined that the first cell is selected; the second manner is different from the first manner.

[0322] In some embodiments, when the first cell transmits SIB1 in a first manner and the terminal has service data to be transmitted, it is determined that the first cell is not selected.

[0323] In some embodiments, when the first cell sends SIB1 in a first manner and the terminal has no service data to be sent, it is determined that the first cell can be selected or not.

[0324] In some embodiments, when the first cell sends SIB1 in a first manner and the terminal causes cell selection failure due to radio link failure or cell handover failure during service transmission, it is determined not to select the first cell.

[0325] In some embodiments, a first condition is met, and the selection of a first cell is determined based on whether the first cell sends SIB1 in a first manner.

[0326] In some embodiments, satisfying the first condition may include: the terminal re-establishing the RRC connection.

[0327] In some embodiments, satisfying the first condition may further include: the terminal's wireless link failing.

[0328] In some embodiments, satisfying the first condition may further include: the terminal's cell handover failed.

[0329] In some embodiments, if the first condition is not met, the terminal may also determine whether to select the first cell by sending SIB1 in the first manner.

[0330] In other embodiments, if the first condition is not met, the terminal determines whether to select the first cell in a conventional manner. For example, the terminal ignores whether the first cell sends SIB1 to determine whether to select the first cell in the first manner.

[0331] If the initial access upon powering on of the terminal is not the reconstruction of the terminal's RRC connection, the terminal may not be in a hurry to quickly establish an RRC connection with the network device for service transmission. In this case, in order for more terminals to choose to access the energy-saving cell that sends SIB1 in the first manner, the terminal can ignore whether the first cell sends SIB1 in the first manner, and instead determine whether to select the first cell based on the signal quality of the first cell and other factors.

[0332] In some embodiments, if the terminal's RRC connection has been disconnected for some time due to a radio link failure and / or cell handover failure, the terminal may be eager to re-establish the RRC connection for service transmission. To reduce the delay in RRC connection re-establishment and minimize re-establishment failures caused by the inability to complete the re-establishment within the specified time, the first condition can be considered met, and it is necessary to determine whether to select the first cell based on whether the first cell sends SIB1 according to the first method. The specified time can be determined by the operation of timer T311. For example, the terminal starts T311 after a radio link failure or cell handover failure, and performs cell selection during the operation of T311, and accesses (i.e., camps) the selected cell. If T311 times out and the terminal has not yet completed RRC connection re-establishment in the selected cell, it indicates that the terminal's RRC connection re-establishment has failed.

[0333] For example, if the terminal selects the first cell, it means that the first cell is selected as the target cell. If the terminal does not select the first cell, it means that the terminal does not select the first cell as the target cell.

[0334] In some embodiments, after selecting a target cell, the terminal can access the target cell based on a cell handover procedure, a cell reselection procedure, an RRC reconstruction procedure, and / or an initial access procedure.

[0335] It is worth noting that the target cell here can also be understood as a suitable cell. The process for selecting a suitable cell can be found in the embodiment corresponding to Figure 2A, and will not be repeated here.

[0336] In view of this, as shown in FIG2C, this embodiment provides a cell selection method, which can be executed by the communication system shown in FIG1A. The method may include:

[0337] S2301: The network device sends the second information to the terminal.

[0338] In some embodiments, the network device of the second cell sends second information.

[0339] In some embodiments, the second cell may be the serving cell of a connected terminal, the camping cell of an idle / inactive terminal, etc.

[0340] In some embodiments, the second cell may be a regular cell adjacent to the first cell. This regular cell may be a cell that periodically transmits SSBs.

[0341] In some embodiments, for carrier-only and / or dual-connectivity scenarios, the second cell may be the primary cell of the terminal and the first cell may be the secondary cell of the terminal. Alternatively, the second cell may be both the primary and secondary cells of the terminal and the first cell may be a regular secondary cell of the terminal.

[0342] In some embodiments, the second information includes at least some of the information required for the terminal to access the third cell.

[0343] In some embodiments, the third cell is a cell that transmits SIB1 in accordance with the first method.

[0344] It is worth noting that the first method can be referred to in the relevant description of the corresponding embodiments of Figure 2A and / or Figure 2B, and specific examples will not be repeated here.

[0345] In some embodiments, information is required when a terminal selects a first cell for access and / or camping.

[0346] In some embodiments, the parameters by which a terminal selects a first cell for access and / or camping may include, but are not limited to, the cell carried in the Serving Cell Configuration Common Information Element (IE).

[0347] In some embodiments, ServingCellConfigCommon IE may include, but is not limited to, at least one of the following:

[0348] The downlink common configuration (downlinkConfigCommon) is used to configure the downlink of the first cell;

[0349] The uplink common configuration (uplinkConfigCommon) is used to configure the uplink of the first cell;

[0350] The n-TimingAdvanceOffset is used to configure the timing advance of the terminal in the first cell.

[0351] The first cell uses TDD for uplink and downlink frame structure configuration (TDD-UL-DL-ConfigCommon), etc.

[0352] In some embodiments, the information required for a terminal to select a first cell for access and / or camp may include, but is not limited to, at least one of the following:

[0353] Physical community identifiers;

[0354] Configuration of common channels;

[0355] SSB configuration, such as SSB transmission period, SSB transmission mechanism and / or SSB transmission power, etc.

[0356] In some embodiments, the information required to access or camp on the first cell includes at least one of the following:

[0357] SIB1 of the first community;

[0358] Criteria for selecting the first cell.

[0359] For example, the criterion information may include: information about the S criterion.

[0360] In some embodiments, the criterion information may include: a threshold for selecting a first cell.

[0361] For example, taking a cell as a TDD cell as an example, the criteria for cell selection are as follows:

[0362] Srxlev>0

[0363] Where, Srxlev=Qrxlevmeas-Qrxlevmin-Pcompensation(dB),

[0364] Qrxlevmeas — The measured value (dBm) of the primary common control physical channel (p-ccpch) pilot channel signal strength (Receive Signal Channel Power, RSCP) of the cell;

[0365] Qrxlevmin—the minimum received signal level (dBm) required by the cell; Qrxlevmin can be understood as the threshold at which a terminal can access or reselect the cell.

[0366] Pcompensation——max(UE_TXPWR_MAX_RACH–P_MAX,0)(dB);

[0367] UE_TXPWR_MAX_RACH — The maximum transmit power (dBm) allowed on the RACH channel when the terminal accesses the cell;

[0368] P_MAX — The terminal's maximum transmit power (dBm).

[0369] In some embodiments, the second information includes at least one of the following:

[0370] Signage information for the third residential area;

[0371] SIB1 of the third community;

[0372] Criteria for selecting a third cell.

[0373] For example, the identification information of the third cell is a physical cell identifier and / or a high-rise cell identifier. If the identification information of the third cell is a physical cell identifier, the terminal can determine whether the cell is the third cell by matching the physical cell identifier when it detects that a cell MIB has been monitored.

[0374] In some embodiments, the identification information of the third cell includes at least one of the following:

[0375] The physical community signage for the third community;

[0376] Frequency information for the third cell.

[0377] S2302: The terminal determines whether to select the first cell.

[0378] In some embodiments, when the first cell sends SIB1 in a first manner and the second information includes all the information required to access or camp on the first cell, the first cell is selected.

[0379] In this embodiment of the disclosure, since the second information includes the information required to access the first cell, the terminal does not need to wait for the first cell to send SIB1 to obtain it when selecting the first cell. Therefore, the latency can be reduced and the failure rate of RRC connection reconstruction can be lowered.

[0380] In some embodiments, if the second information does not contain the SIB1 of the first cell and the first cell sends the SIB1 in a first manner, it is determined that the first cell is not selected.

[0381] In some embodiments, for example, if the second information includes complete information required for one or more terminals to camp on or access a third cell, then when a terminal determines, based on the first information in the embodiment corresponding to FIG2A or the MIB in the embodiment corresponding to FIG2B, that the first cell is transmitting SIB1 in the first manner and that the first cell belongs to the third cell, it determines to select the first cell. Alternatively, when a terminal determines, based on the first information in the embodiment corresponding to FIG2A or the MIB in the embodiment corresponding to FIG2B, that the first cell is transmitting SIB1 in the first manner and that the first cell belongs to the third cell, it determines to select the first cell.

[0382] In this embodiment of the disclosure, not selecting the first cell can reduce the failure rate and latency of RRC connection re-establishment.

[0383] When the first cell sends SIB1 and the second information, including the information required to access or camp on the first cell, it is determined that the first cell will not be selected.

[0384] For example, if the second information contains only partial information about the terminal accessing or camping on the first cell, some information will still be missing, which can still lead to RRC connection reconstruction failure or large RRC connection reconstruction delay. Therefore, in this embodiment, not selecting the first cell can reduce the failure rate and delay of RRC connection reconstruction.

[0385] For example, the second information may include the configuration of the SSB and / or the configuration of the common channel of the first cell, but if the criterion information is missing, then the second information is considered to include only the part of the information required to camp on or access the first cell.

[0386] For example, if the second information includes the criteria information of the first cell, but lacks the configuration of the SSB and / or the configuration of the common channel, then the second information is considered to only include the part of the information required to camp on or access the first cell.

[0387] In some embodiments, after selecting a target cell, the terminal can access the target cell based on a cell handover procedure, a cell reselection procedure, an RRC reconstruction procedure, and / or an initial access procedure.

[0388] It is worth noting that the target cell here can also be understood as a suitable cell. The process for selecting a suitable cell can be found in the embodiment corresponding to Figure 2A, and will not be repeated here.

[0389] As shown in Figure 3A, this embodiment of the present disclosure provides a cell selection method, executed by a terminal, the method comprising:

[0390] S3101: Receive first information.

[0391] In some embodiments, the first information is received in the second cell.

[0392] In some embodiments, the first information can be used by the terminal to determine whether the first cell sends SIB1 in a first manner.

[0393] In some embodiments, the relevant content of the first information and / or the first method can be found in the embodiment corresponding to FIG2A.

[0394] S3102: Determine whether to select the first cell.

[0395] In this common embodiment, the terminal determines whether to select the first cell based on whether the first cell sends SIB1 in the first manner.

[0396] In some embodiments, any optional implementation of S3102 can refer to the optional implementation of S2102 of the embodiment corresponding to FIG2A.

[0397] As shown in Figure 3B, this embodiment of the present disclosure provides a cell selection method, executed by a terminal, the method comprising:

[0398] S3201: Receives the MIB of the first cell.

[0399] In some embodiments, the MIB can be used by the terminal to determine whether the first cell sends SIB1 in a first manner.

[0400] In some embodiments, the relevant descriptions of the MIB and the first mode of the first cell can be found in the embodiment corresponding to Figure 2B.

[0401] S3202: Determine whether to select the first cell.

[0402] In this common embodiment, the terminal determines whether to select the first cell based on whether the first cell sends SIB1 in the first manner.

[0403] In some embodiments, any optional implementation of S3202 can refer to the optional implementation of S2202 of the embodiment corresponding to FIG2B.

[0404] As shown in Figure 3C, this embodiment of the present disclosure provides a cell selection method, executed by a terminal, the method comprising:

[0405] S3301: Receive the second information.

[0406] In some embodiments, the terminal receives second information from the second cell.

[0407] In some embodiments, the second information indicates the information required to access or reside in a third cell that transmits SIBs in a first manner.

[0408] In some embodiments, the relevant descriptions of the second information and the first method can be found in the embodiment corresponding to FIG2B.

[0409] S3302: Determine whether to select the first cell.

[0410] In this common embodiment, the terminal determines whether to select the first cell based on whether the first cell sends SIB1 in the first manner.

[0411] In some embodiments, any optional implementation of S3302 can refer to the optional implementation of S2202 of the embodiment corresponding to FIG2B.

[0412] As shown in Figure 4A, this embodiment of the present disclosure provides a cell selection method, executed by a second network device of a second cell, the method comprising:

[0413] S4101: Send the first message.

[0414] In some embodiments, the first information is sent in the second cell.

[0415] In some embodiments, the first information is broadcast, multicast, or unicast in the second cell.

[0416] In some embodiments, the first information can be used by the terminal to determine whether the first cell sends SIB1 in a first manner.

[0417] In some embodiments, the relevant content of the first information and / or the first method can be found in the embodiment corresponding to FIG2A.

[0418] As shown in Figure 4B, this embodiment of the present disclosure provides a cell selection method, executed by a second network device of a second cell, the method comprising:

[0419] S4201: Send the second message.

[0420] In some embodiments, second information is transmitted in the second cell.

[0421] In some embodiments, second information is broadcast, multicast, or unicast in the second cell.

[0422] In some embodiments, the second information includes at least some of the information required for the terminal to access the third cell.

[0423] In some embodiments, the third cell is a cell that transmits SIB1 in accordance with the first method.

[0424] In some embodiments, the relevant content of the first information and / or the first method can be found in the embodiment corresponding to FIG2C.

[0425] As shown in Figure 4C, this embodiment of the present disclosure provides a cell selection method, executed by a first network device of a first cell, the method comprising:

[0426] S4301: Determine the MIB of the first cell based on whether the first cell sends SIB1 in the first manner.

[0427] In some embodiments, the verification method of MIB is determined based on whether the first cell sends SIB1 in a first manner.

[0428] This verification method can be distinguished by the verification algorithm and / or the verification mask.

[0429] For example, the verification method may include CRC verification.

[0430] In some embodiments, it is determined whether the MIB contains the first bit based on whether the first cell transmits SIB1 in a first manner.

[0431] In some embodiments, the indication content of the second bit contained in the MIB is determined based on whether the first cell transmits SIB1 in a first manner.

[0432] In some embodiments, the association between the MIB of the first cell and whether the first cell sends SIB1 in the first manner can be seen in the embodiment corresponding to Figure 2B.

[0433] In some embodiments, the relevant content of the MIB of the first cell can be found in the embodiment corresponding to Figure 2B.

[0434] S4302: Send the MIB of the first cell.

[0435] In some embodiments, the MIB can be used by the terminal to determine whether the first cell sends SIB1 in a first manner.

[0436] In some embodiments, the relevant descriptions of the MIB and the first mode of the first cell can be found in the embodiment corresponding to Figure 2B.

[0437] This disclosure provides an embodiment in which, when a terminal experiences an RLF or HOF, it can skip cells that send SIBs on demand during cell selection, thereby increasing the success rate of RRC connection reconstruction, reducing service interruption latency during RRC connection recovery, and improving user experience.

[0438] Method 1: Before the current serving cell fails, a blacklist of cells is configured for cell selection. During the cell selection process, the terminal skips cells in the blacklist.

[0439] For terminals in connected state (RRC_CONNECTED), a cell list is configured via RRC-specific signaling. This cell list can be identified by PCI and frequency. When the terminal sends an RLF or HOF to perform cell selection, it will not consider cells in the cell list as candidate cells for RRC connection reconstruction, or it will skip evaluating whether cells in the cell list meet the S criterion.

[0440] Method 2: The terminal autonomously detects the MIB of the target cell selected by the cell to determine the SIB broadcast status and decides whether to select the cell as the RRC connection reconstruction cell.

[0441] Referring to Figure 6A, for a terminal in connected state (RRC_CONNECTED), when the terminal sends an RLF or HOF to perform cell selection, it obtains the SIB1 broadcast status indication information from the MIB for candidate cells or during measurement. If the SIB1 broadcast status indication information indicates that the cell has no SIB1 broadcast, the terminal will not consider that cell as a candidate cell for RRC connection reconstruction, or the terminal will skip evaluating whether the cell meets the S criterion.

[0442] The MIB indicates the broadcast status of SIB1, for CD-SSBs or SSBs transmitted on the synchronization grid.

[0443] Option 1: The absence of RMSI can be indicated by the subcarrier offset (ssb-SubcarrierOffset) of the SSB in the MIB, and SIB1 can be requested, for example, ssb-SubcarrierOffset = 30 for Frequency Range 1 (FR1) or ssb-SubcarrierOffset = 14 for Frequency Range 2 (FR2).

[0444] Option 2: The spare bit in the MIB can also indicate that there is no SIB1 but it can be requested.

[0445] Option 3: Specify a separate CRC for a MIB, which is different from the traditional CRC and is used to indicate that SIB1 is not available but can be requested. This new CRC can be calculated based on the original CRC; for example, the new CRC is equal to the original CRC + 1.

[0446] Option 4: Define at least two CRC masks. One CRC mask indicates that SIB1 is not sent but a request is possible. The other CRC mask indicates that no SIB1 was sent. A third CRC mask can also be defined to indicate that SIB1 was sent.

[0447] Option 5: The MIB carries an indication message indicating whether there is no SIB available to request, no SIB is available, or an SIB is available.

[0448] Option 3: Configure neighboring cell public resource configuration and / or cell selection parameter configuration before the current serving cell fails.

[0449] For terminals in connected state (RRC_CONNECTED), a cell list is configured via RRC dedicated signaling or system broadcast. The configuration information for each cell in the cell list includes at least one of the following:

[0450] PCI and frequency f;

[0451] Community signage.

[0452] Community public resource configuration information, such as configuration parameters in ServingCellConfigCommonSIB;

[0453] Community SIB1;

[0454] Configuration parameters for the S criterion in community assessment.

[0455] When the terminal sends an RLF or HOF, during cell selection, if the target cell is a cell in the cell list, the terminal performs an S-criteria evaluation based on the configuration parameters. If the criteria are met, the terminal initiates the RRC connection reconstruction process, etc.

[0456] If no S-criteria evaluation parameters are configured, the S-criteria configuration parameters in the serving cell at the time of failure are used to evaluate whether the candidate cell's S-criteria are met. If the S-criteria are met, the RRC connection reconstruction process is initiated.

[0457] This disclosure provides an embodiment for cells that only send SIB1 when a request is required. When an RLF / HOF occurs, the terminal can skip such cells when performing cell selection, thereby increasing the success rate of RRC connection reconstruction, reducing service interruption latency during RRC connection recovery, and improving user experience.

[0458] 1: The currently serving cell is configured with a blacklist of cells for cell selection before failure, and the terminal skips cells in the blacklist during the cell selection process.

[0459] 2: The terminal autonomously detects the target cell's MIB to determine the SIB broadcast status and decides whether to select the cell as the RRC connection reconstruction cell.

[0460] 3: Configure neighboring cell public resources and / or cell selection parameters before the current serving cell fails.

[0461] In the embodiments disclosed herein, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations in other embodiments.

[0462] In the embodiments disclosed herein, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations in other embodiments.

[0463] This disclosure also provides apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, or a core network device) in any of the above methods.

[0464] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0465] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a type of microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), a Deep Learning Processing Unit (DPU), etc.

[0466] As shown in Figure 5A, this embodiment of the present disclosure provides a terminal, wherein the terminal includes:

[0467] Processing module 5101 is configured to determine whether to select a first cell based on whether the first cell transmits SIB1 in a first manner; transmitting SIB1 in the first manner includes at least one of the following:

[0468] SIB1 is sent based on the terminal request;

[0469] SIB1 is sent based on an on-demand mechanism.

[0470] In some embodiments, the terminal may further include a transmitting module and a receiving module.

[0471] In some embodiments, the processing module can be used by the terminal to execute information processing-related steps in any cell selection method.

[0472] In some embodiments, the transmitting module and / or receiving module may correspond to the network interface and / or transceiver antenna of the terminal.

[0473] In some embodiments, the sending module can be used by the terminal to perform information sending-related steps in any cell selection method.

[0474] In some embodiments, the receiving module can be used by the terminal to perform information transmission-related steps in any cell selection method.

[0475] In some embodiments, the processing module is configured to determine whether to select a first cell based on whether the first cell sends SIB1 in a first manner, provided that a first condition is met.

[0476] In some embodiments, the first condition includes at least one of the following:

[0477] The terminal's wireless link failed;

[0478] The terminal failed to switch cells.

[0479] In some embodiments, the receiving module is configured to receive first information from a second cell; the first information is used by the terminal to determine whether the first cell transmits SIB1 in a first manner; the processing module is configured to determine whether the first cell transmits SIB1 in a first manner based on the first information.

[0480] In some embodiments, the first information includes at least one of the following:

[0481] The Physical Cell Identifier (PCI) of cells that do not send SIB1;

[0482] Frequency identifier.

[0483] In some embodiments, the receiving module is configured to receive a Master Information Block (MIB) sent by a first cell;

[0484] The processing module is also configured to determine whether the first cell should send SIB1 in the first manner based on the MIB.

[0485] In some embodiments, the processing module is configured to perform at least one of the following:

[0486] Based on the MIB verification method, determine whether the first cell sends SIB1 according to the first method;

[0487] Based on whether the MIB contains the first bit, determine whether the first cell sends SIB1 in the first manner;

[0488] Based on the indication content of the second bit contained in the MIB, determine whether the first cell sends SIB1 in the first manner.

[0489] In some embodiments, the processing module is configured to perform at least one of the following:

[0490] Based on the verification algorithm used by the MIB, determine whether the first cell sends SIB1 in the first manner;

[0491] Based on the verification mask used by the MIB, determine whether the first cell sends SIB1 in the first manner.

[0492] In some embodiments, the processing module is configured to perform at least one of the following:

[0493] The first cell sends SIB1 according to the first method, confirming that the first cell is not selected;

[0494] The first cell sends SIB1 according to the second method to confirm the selection of the first cell; the second method is different from the first method.

[0495] In some embodiments, the receiving module is configured to receive second information from a second cell; the second information includes at least some information required for the terminal to access a third cell; the third cell is a cell that transmits SIB1 in a first manner;

[0496] The processing module is configured to perform at least one of the following:

[0497] The first cell sends SIB1 according to the first method and the second information includes all the information required to access or camp on the first cell, and then determines to select the first cell;

[0498] If the second information does not contain the SIB1 of the first cell and the first cell sends the SIB1 in the first manner, it is determined that the first cell will not be selected.

[0499] The first cell sends SIB1 according to the first method, and the second information includes some information required to access or camp on the first cell, and determines that the first cell is not selected.

[0500] In some embodiments, the information required to access or camp on the first cell includes at least one of the following:

[0501] SIB1 of the first community;

[0502] Criteria for selecting the first cell.

[0503] Figure 5B illustrates a first network device provided in an embodiment of this disclosure, wherein the first network device is a network device for a first cell, and the first network device includes:

[0504] The sending module 5201 is configured to send a main information block (MIB) based on whether the first cell sends SIB1 according to a first method; the MIB is used by the terminal to determine whether the first cell sends SIB1 according to the first method; sending SIB1 according to the first method includes at least one of the following:

[0505] SIB1 is sent based on the terminal request;

[0506] SIB1 is sent based on an on-demand mechanism.

[0507] In some embodiments, the first network device may further include: a processing module and / or a receiving module.

[0508] In some embodiments, the processing module may be configured to perform any step related to information processing in the cell selection method performed by the first network device.

[0509] In some embodiments, the sending module may be configured to perform any sending-related steps in the cell selection method performed by the first network device.

[0510] In some embodiments, the receiving module may be configured to perform any receiving-related steps in the cell selection method performed by the first network device.

[0511] As shown in Figure 5C, this embodiment of the present disclosure provides a second network device, wherein the second network device is a network device for a second cell, and the second network device includes:

[0512] The sending module 5301 is configured to send first information to the terminal; the first information is used to indicate a cell that sends SIB1 in a first manner; sending SIB1 in the first manner includes at least one of the following:

[0513] SIB1 is sent based on the terminal request;

[0514] SIB1 is sent based on an on-demand mechanism.

[0515] In some embodiments, the second network device may further include a processing module and / or a receiving module.

[0516] In some embodiments, the processing module may be configured to perform any information processing-related steps in the cell selection method performed by the second network device.

[0517] In some embodiments, the sending module may be configured to perform any sending-related steps in the cell selection method performed by the second network device.

[0518] In some embodiments, the receiving module may be configured to perform any receiving-related steps in a cell selection method performed by a second network device.

[0519] In some embodiments, the first information includes at least one of the following:

[0520] The Physical Cell Identifier (PCI) of cells that do not send SIB1;

[0521] Frequency identifier.

[0522] As shown in Figure 5D, this embodiment of the present disclosure provides a second network device, wherein the second network device is a network device for a second cell, and the second network device includes:

[0523] The sending module 5401 is configured to send second information to the terminal; the second information includes at least some information required for the terminal to access a third cell; the third cell is a cell that sends SIB1 according to a first method; the second information is used by the terminal to select the cell to access; sending SIB1 according to the first method includes at least one of the following:

[0524] SIB1 is sent based on the terminal request;

[0525] SIB1 is sent based on an on-demand mechanism.

[0526] In some embodiments, the second network device may further include a processing module and / or a receiving module.

[0527] In some embodiments, the processing module may be configured to perform any information processing-related steps in the cell selection method performed by the second network device.

[0528] In some embodiments, the sending module may be configured to perform any sending-related steps in the cell selection method performed by the second network device.

[0529] In some embodiments, the receiving module may be configured to perform any receiving-related steps in a cell selection method performed by a second network device.

[0530] In some embodiments, the second information includes at least one of the following:

[0531] Signage information for the third residential area;

[0532] SIB1 of the third community;

[0533] Criteria for selecting a third cell.

[0534] In some embodiments, the identification information of the third cell includes at least one of the following:

[0535] The physical community signage for the third community;

[0536] Frequency information for the third cell.

[0537] This disclosure also provides a communication device, which may include one or more processors; wherein the processors are configured to invoke instructions to cause the communication device to execute a cell selection method that can be implemented in any of the foregoing embodiments.

[0538] In some embodiments, as shown in FIG7A and / or FIG7B, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may also be located outside the communication device 8100.

[0539] The communication device may be the aforementioned terminal or network device. In some embodiments, the network device may be a master node and / or a slave node.

[0540] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the communication steps such as sending and receiving in the above method are performed by the transceivers 8103, and other steps are performed by the processor 8101.

[0541] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, etc., may be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., may be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., may be used interchangeably.

[0542] Optionally, the communication device 8100 further includes one or more interface circuits 8104, which are connected to the memory 8102. The interface circuits 8104 can be used to receive signals from the memory 8102 or other devices, and can be used to send signals to the memory 8102 or other devices. For example, the interface circuits 8104 can read instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0543] The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in this disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG7A. The communication device may be a standalone device or may be part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0544] Figure 7B is a schematic diagram of the structure of chip 8200 provided in an embodiment of this disclosure. For cases where the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of chip 8200 shown in Figure 7B, but it is not limited thereto.

[0545] Chip 8200 includes one or more processors 8201, which are used to invoke instructions to cause chip 8200 to execute any of the above cell selection methods.

[0546] In some embodiments, chip 8200 further includes one or more interface circuits 8202 connected to memory 8203. Interface circuits 8202 can be used to receive signals from memory 8203 or other devices, and can also be used to send signals to memory 8203 or other devices. For example, interface circuit 8202 can read instructions stored in memory 8203 and send those instructions to processor 8201. Optionally, terms such as interface circuit, interface, transceiver pin, and transceiver can be used interchangeably.

[0547] In some embodiments, chip 8200 further includes one or more memories 8203 for storing instructions. Optionally, all or part of the memories 8203 may be located outside of chip 8200.

[0548] This disclosure also provides a storage medium storing instructions that, when executed on a communication device 8100, cause the communication device 8100 to perform any of the methods described above. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but it can also be a temporary storage medium.

[0549] This disclosure also provides a program product, which, when executed by a communication device 8100, causes the communication device 8100 to perform any of the above cell selection methods. Optionally, the program product is a computer program product.

[0550] This disclosure also provides a computer program that, when run on a computer, causes the computer to perform any of the above cell selection methods.

[0551] Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the embodiments of this disclosure that follow the general principles of the embodiments of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the embodiments of this disclosure are indicated by the following claims.

[0552] It should be understood that the embodiments disclosed herein are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments disclosed herein is limited only by the appended claims.

Claims

1. A method for selecting a residential community, wherein, The method, executed by a terminal, includes: Whether to select the first cell is determined based on whether the first cell sends System Information Block SIB1 in the first manner; the sending of System Information Block SIB1 in the first manner includes at least one of the following: Based on the terminal request, SIB1 is sent; SIB1 is sent based on an on-demand mechanism.

2. The method according to claim 1, wherein, The step of determining whether to select the first cell based on whether the first cell sends System Information Block SIB1 in the first manner includes: If the first condition is met, determine whether to select the first cell based on whether the first cell sends system information block SIB1 in the first manner.

3. The method according to claim 2, wherein, The first condition includes at least one of the following: The terminal's wireless link failed; The terminal failed to hand over to a new cell.

4. The method according to any one of claims 1 to 3, wherein, The method further includes: The terminal receives first information from the second cell; the first information is used by the terminal to determine whether the first cell sends SIB1 in the first manner. Based on the first information, determine whether the first cell sends the SIB1 in the first manner.

5. The method according to claim 4, wherein, The first information includes at least one of the following: The Physical Cell Identifier (PCI) of the SIB1 cell is not sent. Frequency identifier.

6. The method according to any one of claims 1 to 3, wherein, The method further includes: Receive the Master Information Block (MIB) sent by the first cell; The first cell is determined based on the MIB whether it sends the SIB1 in the first manner.

7. The method according to claim 6, wherein, Determining whether the first cell transmits SIB1 according to the first method based on the MIB includes at least one of the following: Based on the verification method of the MIB, determine whether the first cell sends the SIB1 according to the first method; Based on whether the MIB contains the first bit, determine whether the first cell sends the SIB1 in the first manner; Based on the indication content of the second bit contained in the MIB, it is determined whether the first cell transmits the SIB1 in the first manner.

8. The method according to claim 7, wherein, Determining whether the first cell sends SIB1 according to the first method based on the MIB verification method includes at least one of the following: Based on the verification algorithm used by the MIB, it is determined whether the first cell sends the SIB1 in the first manner; Based on the verification mask used by the MIB, determine whether the first cell sends the SIB1 in the first manner.

9. The method according to any one of claims 1 to 8, wherein, The step of determining whether to select the first cell based on whether the first cell sends System Information Block SIB1 in the first manner includes at least one of the following: The first cell sends SIB1 according to the first method, indicating that the first cell is not selected; The first cell sends SIB1 according to the second method to determine the selection of the first cell; the second method is different from the first method.

10. The method according to any one of claims 1 to 3, wherein, The method further includes: The terminal receives second information from the second cell; the second information includes at least some information required for the terminal to access the third cell; the third cell is the cell that transmits SIB1 in the first manner. The step of determining whether to select the first cell based on whether the first cell sends System Information Block SIB1 in the first manner includes at least one of the following: The first cell sends the SIB1 in the first manner, and the second information includes all the information required to access or camp on the first cell, and determines to select the first cell; The second information does not contain the SIB1 of the first cell, and the first cell sends the SIB1 in the first manner, therefore it is determined that the first cell is not selected; The first cell sends the SIB1 and the second information, including some information required to access or camp on the first cell, in accordance with the first method, and determines that the first cell is not selected.

11. The method according to claim 10, wherein, The information required to access or reside in the first cell includes at least one of the following: SIB1 of the first cell; Criteria for selecting the first cell.

12. A method for selecting a cell, wherein, The method, performed by the first network device of the first cell, includes: Based on whether the first cell sends System Information Block SIB1 in the first manner, a Master Information Block (MIB) is sent; the MIB is used by the terminal to determine whether the first cell sends SIB1 in the first manner; sending System Information Block SIB1 in the first manner includes at least one of the following: Based on the terminal request, SIB1 is sent; SIB1 is sent based on an on-demand mechanism.

13. The method according to claim 12, wherein, The method further includes at least one of the following: The verification method of the MIB is determined based on whether the first cell sends SIB1 in the first manner; Based on whether the first cell sends SIB1 in the first manner, it is determined whether the MIB contains the first bit; The indication content of the second bit contained in the MIB is determined based on whether the first cell sends SIB1 in the first manner.

14. The method according to claim 12, wherein, The step of determining the verification method of the MIB based on whether the first cell sends SIB1 in the first manner includes at least one of the following: The verification algorithm of the MIB is determined based on whether the first cell sends SIB1 in the first manner; The verification mask of the MIB is determined based on whether the first cell sends SIB1 in the first manner.

15. A method for selecting a cell, wherein, The method, performed by a second network device in the second cell, includes: Sending first information to the terminal; the first information is used to indicate the cell that sends System Information Block SIB1 in a first manner; the sending of System Information Block SIB1 in the first manner includes at least one of the following: Based on the terminal request, SIB1 is sent; SIB1 is sent based on an on-demand mechanism.

16. The method according to claim 15, wherein, The first information includes at least one of the following: The Physical Cell Identifier (PCI) of the SIB1 cell is not sent. Frequency identifier.

17. A cell selection method, wherein, The method, performed by a second network device in the second cell, includes: Sending second information to the terminal; the second information includes at least some information required for the terminal to access the third cell; the third cell is a cell that sends System Information Block (SIB1) according to a first method; the second information is used by the terminal to select the cell to access; sending System Information Block (SIB1) according to the first method includes at least one of the following: Based on the terminal request, SIB1 is sent; SIB1 is sent based on an on-demand mechanism.

18. The method according to claim 17, wherein, The second information includes at least one of the following: The identification information of the third community; SIB1 of the third cell; The criteria information for selecting the third cell.

19. The method according to claim 18, wherein, The identification information of the third cell includes at least one of the following: The physical cell identifier of the third cell; The frequency information of the third cell.

20. A terminal, wherein, include: The processing module is configured to determine whether to select the first cell based on whether the first cell transmits System Information Block SIB1 in a first manner; the transmission of System Information Block SIB1 in the first manner includes at least one of the following: Based on the terminal request, SIB1 is sent; SIB1 is sent based on an on-demand mechanism.

21. A first network device, wherein, The first network device is the network device of the first cell, and the first network device includes: The sending module is configured to send a main information block (MIB) based on whether the first cell sends System Information Block (SIB1) in a first manner; the MIB is used by the terminal to determine whether the first cell sends SIB1 in the first manner; sending System Information Block (SIB1) in the first manner includes at least one of the following: Based on the terminal request, SIB1 is sent; SIB1 is sent based on an on-demand mechanism.

22. A second network device, wherein, The second network device is the network device of the second cell, and the second network device includes: The sending module is configured to send first information to the terminal; the first information is used to indicate the cell that sends the SIB1 in accordance with the first method; the sending of the system information block SIB1 in accordance with the first method includes at least one of the following: Based on the terminal request, SIB1 is sent; SIB1 is sent based on an on-demand mechanism.

23. A second network device, wherein, The second network device is the network device of the second cell, and the second network device includes: The sending module is configured to send second information to the terminal; the second information includes at least some information required for the terminal to access a third cell; the third cell is a cell that sends System Information Block (SIB1) according to a first method; the second information is used by the terminal to select the cell to access; sending System Information Block (SIB1) according to the first method includes at least one of the following: Based on the terminal request, SIB1 is sent; SIB1 is sent based on an on-demand mechanism.

24. A communication device, wherein, The communication device includes: One or more processors; The processor is configured to invoke instructions to cause the communication device to perform the method of any one of claims 1 to 11, 12 to 14, 15 to 16 and / or 17 to 19.

25. A storage medium, wherein, The storage medium stores instructions that, when executed on a communication device, cause the communication device to perform the method of any one of claims 1 to 11, 12 to 14, 15 to 16 and / or 17 to 19.

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