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 device and storage medium Technical Field

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

[0002] To achieve network energy conservation, in some cases, network devices may not periodically send System Information Blocks (SIBs) or may not send SIBs at all. Not sending or aperiodically sending SIBs may affect the cell access or reselection delay of the terminal.

[0003] Summary of the Invention

[0004] Embodiments of the present disclosure provide a cell selection method, a communication device, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a cell selection method is provided, where the method is performed by a terminal and includes:

[0006] Whether to select the first cell is determined according to whether the first cell sends SIB1 in a 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.

[0007] According to a second aspect of an embodiment of the present disclosure, a cell selection method is provided, which is executed by a first network device of a first cell, and the method includes: sending a master information block (MIB) according to 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 a 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 an embodiment of the present disclosure, a cell selection method is provided, which is executed by a second network device of a second cell, and the method includes: sending first information to a 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: sending SIB1 based on a terminal request; sending SIB1 based on an on-demand mechanism.

[0009] According to a fourth aspect of an embodiment of the present disclosure, a cell selection method is provided, where the method is performed by a second network device of a second cell, and the method includes:

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

[0011] Send SIB1 based on terminal request;

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

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

[0014] The processing module is configured to determine whether to select the first cell according to whether the first cell sends SIB1 in a first manner; sending SIB1 in the first manner includes at least one of the following:

[0015] Send SIB1 based on terminal request;

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

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

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

[0019] Send SIB1 based on terminal request;

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

[0021] According to a seventh aspect of an embodiment of the present disclosure, a second network device is provided, wherein the second network device is a network device of 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] Send SIB1 based on terminal request;

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

[0025] According to an eighth aspect of an embodiment of the present disclosure, a second network device is provided, wherein the second network device is a network device of 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 part of the information required for the terminal to access the third cell; the third cell is a cell that sends SIB1 in the first manner; the second information is used by the terminal to select a cell to access; sending SIB1 in the first manner includes at least one of the following:

[0027] Send SIB1 based on terminal request;

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

[0029] According to the ninth aspect of an embodiment of the present disclosure, a communication device is provided, wherein the communication device includes: one or more processors; wherein the processor is used to call instructions so that the communication device executes the cell selection method provided by any technical solution of the aforementioned first to fifth aspects.

[0030] According to a tenth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, which, when the instructions are executed on a communication device, enable the communication device to execute the cell selection method provided by any of the first to fifth aspects.

[0031] In the technical solution provided by the embodiments of the present disclosure, a terminal determines whether to select a first cell based on whether the first cell transmits SIB1 in a first manner. This is equivalent to adding a reference factor of whether the first cell transmits SIB1 in the first manner during the process of selecting a serving cell or a camped cell. For example, if the terminal establishes or reestablishes an RRC connection with the selected cell, it may not select a cell that transmits SIB1 in the first manner, thereby reducing latency.

[0032] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0034] FIG1A is a schematic diagram showing an architecture of a communication system according to an exemplary embodiment;

[0035] FIG1B is a schematic diagram showing a MIB and a SIB according to an exemplary embodiment;

[0036] FIG1C is a diagram illustrating a resource location relationship between a synchronization signal broadcast block (Synchronization Signal and (Physical Broadcast Channel, PBCH) block, SSB) and a control resource set (CORESET) according to an exemplary embodiment;

[0037] FIG1D is a schematic diagram showing interaction of system information (SI) according to an exemplary embodiment;

[0038] FIG2A is a schematic flow chart showing a cell selection method according to an exemplary embodiment;

[0039] FIG2B is a schematic flow chart showing a cell selection method according to an exemplary embodiment;

[0040] FIG2C is a schematic flow chart showing a cell selection method according to an exemplary embodiment;

[0041] FIG3A is a schematic flow chart showing a cell selection method according to an exemplary embodiment;

[0042] FIG3B is a schematic flow chart showing a cell selection method according to an exemplary embodiment;

[0043] FIG3C is a schematic diagram showing a flow chart of a cell selection method according to an exemplary embodiment;

[0044] FIG4A is a schematic flow chart showing a cell selection method according to an exemplary embodiment;

[0045] FIG4B is a schematic flow chart showing a cell selection method according to an exemplary embodiment;

[0046] FIG4C is a schematic diagram showing a flow chart of a cell selection method according to an exemplary embodiment;

[0047] FIG5A is a schematic structural diagram of a terminal according to an exemplary embodiment;

[0048] FIG5B is a schematic structural diagram of a first network device according to an exemplary embodiment;

[0049] FIG5C is a schematic structural diagram of a second network device according to an exemplary embodiment;

[0050] FIG5D is a schematic structural diagram of a second network device according to an exemplary embodiment;

[0051] FIG6A is a timing diagram showing an RRC reestablishment according to an exemplary embodiment;

[0052] FIG6B is a schematic diagram showing a MIB according to an exemplary embodiment;

[0053] FIG6C is a schematic diagram showing a serving cell common configuration SIB according to an exemplary embodiment;

[0054] FIG6D is a schematic diagram showing a SIB1 according to an exemplary embodiment;

[0055] FIG7A is a schematic structural diagram of a communication device according to an exemplary embodiment;

[0056] FIG7B is a schematic structural diagram of a chip according to an exemplary embodiment. DETAILED DESCRIPTION

[0057] Embodiments of the present disclosure provide a cell selection method, communication equipment, communication system, and storage medium.

[0058] A first aspect provides a cell selection method, performed by a terminal, the method comprising:

[0059] Whether to select the first cell is determined according to whether the first cell sends SIB1 in a 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.

[0060] Based on the above solution, the terminal determines whether to select the first cell based on whether the first cell sends SIB1 in the first manner. This is equivalent to adding whether the first cell sends SIB1 in the first manner as a reference factor when selecting a serving cell or a camped cell. If the terminal establishes or re-establishes an RRC connection with the selected cell, it may not select a cell that sends SIB1 in the first manner, thereby reducing latency.

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

[0062] Based on the above scheme, when the first condition is met, whether to select the first cell is determined based on whether the first cell sends SIB1 in the first manner, rather than all cell selections are determined based on whether the first cell sends SIB1 in the first manner, thereby making it possible or more likely for the terminal to access or reside on a 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] Radio Link Failure (RLF) of the terminal;

[0065] The cell handover failure (Handover Failure, HOF) of the terminal.

[0066] Based on the above scheme, optional implementation methods of the first condition are listed. The specific implementation is not limited to the above method. Any scenario where the terminal is eager to establish a (Radio Resource Control, RRC) connection with a cell or reestablish an RRC connection can be applied as the first condition.

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

[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] Determine, according to the first information, whether the first cell sends SIB1 in the first manner.

[0070] Based on the above solution, the terminal may determine whether the first cell sends SIB1 in the first manner based on the first information received in the current cell (ie, the current serving cell or the current camped 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 identification.

[0074] Based on the above solution, the first information includes the PCI, so that when the terminal detects the MIB of a certain cell, it can determine whether the cell is a cell that sends the SIB in the first manner in combination with the first information.

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

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

[0077] Determine whether the first cell sends SIB1 in the first manner according to the MIB.

[0078] Based on the above scheme, the terminal is equivalent to determining whether the first cell sends SIB1 in the first manner based on 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 interactive signaling between cells.

[0079] In some embodiments of the first aspect, determining, according to the MIB, whether the first cell sends SIB1 in the first manner includes:

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

[0081] Determining, according to whether the MIB includes the first bit, whether the first cell sends SIB1 in the first manner;

[0082] Determine whether the first cell sends SIB1 in the first manner according to the indication content of the second bit included in the MIB.

[0083] The above solution provides a specific implementation of 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, according to a verification method of the MIB, whether the first cell sends the SIB1 in the first manner includes at least one of the following:

[0085] Determining, according to a verification algorithm used by the MIB, whether the first cell sends SIB1 in the first manner;

[0086] Determine whether the first cell sends SIB1 in the first manner according to the check mask used by the MIB.

[0087] The above solution specifically provides how to determine whether the first cell sends SIB1 according to the first method through the MIB verification method, and has the characteristic of being easy to implement.

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

[0089] The first cell sends SIB1 according to the first method, and determines not to select the first cell;

[0090] 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.

[0091] The above solution provides that the terminal preferentially selects the cell that sends SIB1 in the second manner, thereby reducing the delay of establishing or reestablishing the RRC connection.

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

[0093] Determining whether to select the first cell according to whether the first cell sends the SIB1 in the first manner includes at least one of the following:

[0094] The first cell sends SIB1 in the first manner, and the second information includes all information required to access or reside in the first cell, and determines to select the first cell;

[0095] The second information does not include the SIB1 of the first cell and the first cell sends the SIB1 in the first manner, and it is determined that the first cell is not selected;

[0096] The first cell sends SIB1 in a first manner, and the second information includes partial information required for accessing or residing in the first cell, and determines not to select the first cell.

[0097] The above solution specifically defines how the terminal selects a cell in combination with the second information, and 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 cell;

[0100] Criteria information for selecting the first cell.

[0101] The above solution specifically provides examples of information required to access or reside in the first cell, and the specific implementation is not limited to the above examples.

[0102] A second aspect provides a cell selection method, performed by a first network device of a first cell, the method including:

[0103] Sending a master information block (MIB) according to whether the first cell sends SIB1 in the first manner; the MIB is used by the 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:

[0104] Send SIB1 based on terminal request;

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

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

[0107] Determining a verification method for the MIB according to whether the first cell sends the SIB1 in the first manner;

[0108] Determining whether the MIB includes the first bit according to whether the first cell sends the SIB1 in the first manner;

[0109] The indication content of the second bit included in the MIB is determined according to whether the first cell sends SIB1 according to the first method.

[0110] In some embodiments of the second aspect, determining a verification method for the MIB according to whether the first cell sends the SIB1 in the first manner includes at least one of the following:

[0111] Determining a verification algorithm for the MIB according to whether the first cell sends the SIB1 in the first manner;

[0112] The check mask of the MIB is determined according to whether the first cell sends the SIB1 in the first manner.

[0113] A third aspect provides a cell selection method, performed by a second network device of a second cell, the method including:

[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] Send SIB1 based on 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] Physical cell identifier PCI of the cell that does not send SIB1;

[0119] Frequency identification.

[0120] A fourth aspect provides a cell selection method, performed by a second network device of a second cell, the method including:

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

[0122] Send SIB1 based on 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] identification information of the third cell;

[0126] SIB1 of the third cell;

[0127] Criteria information for selecting the 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] a physical cell identifier of a third cell;

[0130] Frequency information of the third cell.

[0131] A fifth aspect provides a terminal, comprising:

[0132] The processing module is configured to determine whether to select the first cell according to whether the first cell sends SIB1 in a first manner; sending SIB1 in the first manner includes at least one of the following:

[0133] Send SIB1 based on 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 of a first cell, and the first network device includes:

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

[0137] Send SIB1 based on 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 of 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] Send SIB1 based on terminal request;

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

[0143] An eighth aspect provides a second network device, wherein the second network device is a network device of 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 part of the information required for the terminal to access the third cell; the third cell is a cell that sends SIB1 in the first manner; the second information is used by the terminal to select a cell to access; sending SIB1 in the first manner includes at least one of the following:

[0145] Send SIB1 based on terminal request;

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

[0147] In a ninth aspect, an embodiment of the present disclosure provides a communication device, the communication device including: one or more processors;

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

[0149] In a tenth aspect, an embodiment of the present disclosure provides a storage medium, wherein the storage medium stores instructions, which, when executed on a communication device, enable the communication device to execute the cell selection method described in the optional implementation methods of the first to second aspects.

[0150] In an eleventh aspect, an embodiment of the present disclosure provides a program product. When the program product is executed by a communication device, the communication device executes the cell selection method described in the optional implementation of the first to fourth aspects.

[0151] In a twelfth aspect, an embodiment of the present disclosure provides a computer program, which, when executed on a computer, enables the computer to execute the cell selection method described in the optional implementation of the first to fourth aspects.

[0152] It is understandable that the above-mentioned terminals, network devices, communication systems, program products, and computer programs are all used to execute the methods provided by the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0153] The embodiments of the present disclosure propose a cell selection method, communication equipment, communication system and storage medium. The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0154] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0155] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0156] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "the", "the", 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" in English in translation, the noun following the article can be understood as a singular expression or a plural expression.

[0157] In the embodiments of the present disclosure, “plurality” refers to two or more.

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

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

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

[0161] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different. For another example, if the description object is "information", then the "first category of information" and the "second category of information" can be the same information or different information, and their contents can be the same or different.

[0162] In some embodiments, “including A,” “comprising A,” “used to indicate 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...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0164] In some embodiments, terms such as "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 less than", and "above" can be replaced with each other, and terms such as "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" can be replaced with each other.

[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", "device", "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 the network (eg, access network equipment, core network equipment, 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", "bandwidth part (BWP)" and the like may 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, client, etc. can be used interchangeably.

[0169] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[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, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

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

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

[0173] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0174] FIG1A is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

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

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

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

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

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

[0180] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

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

[0182] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0183] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A , or a portion thereof, but are not limited thereto. The entities shown in FIG1A are illustrative only. The communication system may include all or part of the entities shown in FIG1A , or may include other entities other than those shown in FIG1A . The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0184] The embodiments of the present disclosure 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 (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (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 using configuration methods for other resources, and next-generation systems based on and extending these systems. Furthermore, multiple systems may be combined (for example, LTE and NR).

[0185] In some cases, IoT devices are often powered by traditional batteries with limited lifespans, negatively impacting the user experience. The expected astronomical growth in the number of IoT devices, coupled with the massive scale of these devices, has pushed maintenance expenses, including labor and battery costs, to a whole new level. Billions of traditional batteries are discarded each year, with only a small fraction effectively recycled, negatively impacting the Earth's ecosystem. Maintaining IoT network operations and replacing batteries can be extremely challenging in extreme environmental conditions. Battery-free IoT communications have been proposed to improve network performance and sustainability, expanding their application scenarios. Furthermore, battery-free communications are more environmentally friendly and safer for children and the elderly. Eliminating traditional batteries significantly reduces device size and cost, paving the way for a variety of new applications.

[0186] In some implementations, 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 various vertical sectors. These LPWA technologies offer low cost, low power consumption, and large-scale connectivity, meeting the requirements of many applications. However, many use cases and applications remain unaddressed. First, battery-powered devices are not suitable, such as in extreme environmental conditions (e.g., high voltage, extremely high / low temperatures, and humid environments). Second, maintenance-free devices are required (e.g., devices without traditional batteries requiring replacement). Finally, ultra-low complexity, very small device size / form factor (e.g., mm thickness), and extended lifecycles are required. Ambient-powered IoT devices are promising technologies that can address these unmet needs. Ambient-powered IoT devices are IoT devices powered by energy harvesting, either without batteries or with limited energy storage capabilities (e.g., using capacitors). Energy is collected from radio waves, light, motion, heat, or any other suitable power source.

[0187] Energy obtained from the environment can drive data transmission and wireless communication of sensing nodes. The current mainstream low-power IoT communication chips (such as BLE, LoRa, NB-IoT) have a transmit and receive power consumption of tens or even hundreds of milliwatts, while the energy obtained by environmental energy harvesting is only at the microwatt level, which is unable to drive these types of nodes to work. Therefore, a new wireless communication technology is needed to reduce communication energy consumption to tens of microwatts or even less than ten microwatts. The current mainstream method uses backscatter communication technology. Backscatter Communications is one of the key technologies for building a green, energy-saving, low-cost, and flexibly deployable future Internet of Things, and is an important means to achieve "Intelligent Connection of Everything". The methods that can be used include backscatter transmission (Backscatter Communications) technology.

[0188] The content broadcast by the 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. The scheduling resources may include Physical Downlink Control Channel (PDCCH) resources. The downlink control information (DCI) sent on the PUCCH resources is used to schedule SIB1. SIB1 can also be used to configure scheduling resources for OSI. In some embodiments, SIB1 may also include information required for accessing the corresponding cell and unified access control (UAC) parameters.

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

[0192] For example, SIB3 may include reselection information related to the current serving frequency and the same-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 Mobile Telecommunications System, UMTS) Universal Terrestrial Radio Access (E-UTRA) frequency and E-UTRA neighbor cell related reselection information.

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

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

[0197] For example, SIB8 may include a Commercial Mobile Alert System (CMAS) warning notification.

[0198] For example, SIB9 may include information related to 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 RMSI control resource set (CORESET) is configured by the MIB. The RMSI CORESET has at least three resource location relationships with the SSB. The CORESET includes one or more PDCCH resources. The PDSCH can be used to transmit the SIB.

[0201] The terminal can obtain the resource location of the PDCCH based on the PBCH in the SSB, and further monitor the DCI based on the resource location of the PDCCH, and receive the RMSI according to the scheduling of the monitored DCI.

[0202] FIG1C shows diagrams of CORESET and SSB in different multiplexing modes of a communication system.

[0203] Figure 1 is used for a time division multiplexing (TDM) communication system. Figure 2 is used for a TDM and frequency division multiplexing (FDM) communication system. Figure 3 is used for an FDM communication system.

[0204] In some embodiments, for Network Energy Saving (NES), the system information sent by the network side is reduced.

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

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

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

[0208] In some embodiments, the SI request based on Msg3 does not require the reservation of RACH resources and random access preamble.

[0209] The SI request based on Msg3 can be defined as RRCSystemInfoRequest message (Msg3).

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

[0211] If the base station provides the configuration information of the SI request (eg, si-Request-Config) in the system information (SIB1), 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 may send an SI request confirmation to the terminal.

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

[0214] FIG1D shows a method for information interaction between a network device and a terminal, which may include:

[0215] Network devices broadcast MIBs;

[0216] Network devices broadcast SIB1;

[0217] The terminal sends an SI request;

[0218] Network devices send system information.

[0219] Currently, when a wireless link failure or handover failure occurs in a terminal, the terminal selects a suitable target cell to be accessed through the cell selection, and then initiates the RRC connection reestablishment process to the target cell. In the process of initiating RRC connection reestablishment, the terminal needs to obtain the parameters configured in SIB1 for accessing the target cell. However, if the target cell does not send SIB1 or sends SIB1 on demand, it may cause the terminal to reestablish the RRC connection (for example, if the RRC connection reestablishment timer times out and the RRC connection reestablishment is not completed, the terminal RRC connection reestablishment fails) or the RRC connection reestablishment delay is large.

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

[0221] S2101: The network device sends 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 the 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 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 a primary cell and the first cell may be a secondary cell; or, the second cell may be a primary secondary cell and the first cell may be a regular 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 a cell that sends SIB1 in a first manner.

[0230] In some embodiments, the first information directly or indirectly indicates a cell that does not send SIB1 in the first manner.

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

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

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

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

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

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

[0237] Physical cell identifier PCI of the cell that does not send SIB1;

[0238] Frequency identification.

[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 identification;

[0243] Frequency identification, etc.

[0244] When selecting a cell to access, the terminal can find the frequency used by the cell by monitoring the SSB and / or SIB of the corresponding cell, and then uniquely determine a cell based on the MIB, and further uniquely determine whether the first cell is a cell that sends SIB1 in the first manner.

[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 only performing physical layer signal processing, further simplifying terminal operation and saving terminal power consumption.

[0246] In some embodiments, if the first information includes configuration information in which the terminal requests SIB1 from the first cell, the first information may be considered to implicitly instruct the first cell to send SIB1 in the 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, SI request based on Msg3, and / or request based on a wake-up signal (WUS).

[0247] In some embodiments, the first method includes but is not limited to at least one of the following:

[0248] Send SIB1 based on terminal request;

[0249] Send SIB1 based on an on-demand mechanism;

[0250] SIB1 is sent aperiodically.

[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 reestablish a downlink connection, it can be considered that a demand has been generated, so the cell can actively broadcast SIB1.

[0253] The cell sends SIB according to the needs of the terminal. For example, when the 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, aperiodic transmission of SIB1 may include: not transmitting SIB1 according to a semi-statically configured period, and / or not transmitting SIB1 according to a periodic configuration or a periodic configuration corresponding to a dynamic configuration. That is, whether the first cell transmits SIB1 according to the first manner may include two states: the first cell periodically transmitting SIB1 and the first cell aperiodic transmission of SIB1.

[0255] In some embodiments, if the first cell does not send SIB1 in the first manner, it can be understood that the terminal sends SIB1 in the second manner. If the first cell sends SIB1 in the second manner, the first cell periodically sends SIB1.

[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 a cell selection procedure.

[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 any UTRA carrier. The UE searches all RF channels within the UTRA band. On each carrier, the UE searches for the strongest cell and then selects a suitable cell that belongs to a selected PLMN.

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

[0262] Cell selection based on stored information requires that the terminal has stored carrier frequency information and cell parameters, such as scrambling codes, for candidate cells. This information is obtained from previous measurement control information elements. Once the terminal finds a suitable cell among these cells, it selects it. 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. Exemplarily, the first cell transmits SIB1 in the first manner, and the terminal determines not to select the first cell. Also exemplarily, the first cell transmits SIB1 in a second manner, and the terminal determines to select the first cell; the second manner is different from the first manner.

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

[0265] In some embodiments, the terminal determines whether the first cell sends SIB1 in the first manner based on the first information.

[0266] In some embodiments, the terminal may determine whether the first cell sends SIB1 in the first manner based on the first information and the MIB of the first cell. If the first information indicates that the first cell is a cell that sends SIB1 in the first manner, but the MIB of the first cell currently shows that the first cell periodically broadcasts SIB1, it may be determined that the first cell is currently a cell that does not send SIB1 in the first manner. If the first information indicates that the first cell is a cell that does not send SIB1 in the first manner, but the MIB of the first cell currently shows that the first cell does not periodically broadcast SIB1, it may be determined that the first cell is currently a cell that does not send SIB1 in the first manner. That is, when the terminal determines whether the first cell sends SIB1 in the first manner based on both the first information and the MIB, the priority of the MIB broadcast by the first cell is higher than the first information.

[0267] In some embodiments, the MIB of the first cell explicitly indicates whether the first cell sends SIB1 in the first manner. Exemplarily, the MIB of the first cell includes an indication bit indicating whether the first cell sends SIB1 in the first manner.

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

[0269] In some embodiments, the terminal may further determine whether the first cell sends SIB1 in the first manner based on a verification method of the MIB of the first cell. For example, when the first cell sends SIB1 in the first manner or the second manner, the verification algorithm used by the MIB of the first cell is different, or the verification mask is different. The verification algorithm may include, but is not limited to, a cyclic redundancy check algorithm.

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

[0271] In some embodiments, satisfying the first condition may include: the terminal performing RRC connection reestablishment.

[0272] In some embodiments, satisfying the first condition may further include: a wireless link failure of the terminal.

[0273] In some embodiments, satisfying the first condition may further include: cell handover failure of the terminal.

[0274] In some embodiments, when the first condition is not met, the terminal may also determine whether to select the first cell based on whether SIB1 is sent in the first manner.

[0275] In other embodiments, the first condition is not met, and the terminal determines whether to select the first cell in a conventional manner. Exemplarily, the terminal determines whether to select the first cell regardless of whether the first cell sends SIB1 in the first manner.

[0276] If the initial access when the terminal is powered on is not the reconstruction of the RRC connection of the terminal, 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, but determine whether to select the first cell based on the signal quality of the first cell and other methods.

[0277] In some embodiments, if the terminal fails due to a radio link failure and / or a cell handover failure, it means that the terminal's RRC connection has been disconnected for some time. The terminal may be eager to complete the RRC connection re-establishment for service transmission. In this case, in order to reduce the delay of RRC connection re-establishment and reduce the re-establishment failure caused by the failure to complete the RRC connection re-establishment within the specified time period, it can be considered that the first condition is met, and it is necessary to determine whether to select the first cell based on whether the first cell sends SIB1 in the first manner. The specified time period here can be determined by the operation of timer T301 and / or T311. For example, after the radio link failure or cell handover failure, the terminal starts T311, and performs cell selection during the operation of T311, and accesses (i.e., camps on) the selected cell. If T311 times out and the terminal has not completed the RRC connection re-establishment in the selected cell, it means that the terminal RRC connection re-establishment has failed. If T301 times out and the terminal has not completed the RRC connection re-establishment in the selected cell, it means that the terminal 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 appropriate cell at T301, it means that the RRC connection reestablishment of the terminal has failed. If the RRC connection reestablishment 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 in a first manner, and determines not to select the first cell;

[0280] The first information instructs the first cell not to send SIB1 in the first manner, and determines to select the first cell;

[0281] The first information instructs the first cell to send SIB1 in the second manner, and determines to select the first cell;

[0282] The first information instructs the first cell not to send SIB1 in the second manner, and determines not to select the first cell.

[0283] Exemplarily, 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 may access the target cell based on a cell handover procedure, a cell reselection procedure, an RRC reestablishment procedure and / or an initial access procedure.

[0285] In view of this, as shown in FIG2B , an embodiment of the present disclosure provides a cell selection method that can be performed 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 device 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 the first manner.

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

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

[0292] Determining whether the MIB includes the first bit according to whether the first cell sends the SIB1 in the first manner;

[0293] The indication content of the second bit included in the MIB is determined according to whether the first cell sends SIB1 according to the first method.

[0294] In some embodiments, the first method includes but is not limited to at least one of the following:

[0295] Send SIB1 based on terminal request;

[0296] Send SIB1 based on an on-demand mechanism;

[0297] SIB1 is sent aperiodically.

[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 reestablish a downlink connection, it can be considered that a demand has been generated, so the cell can actively broadcast SIB1.

[0300] The cell sends SIB according to the needs of the terminal. For example, when the 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, aperiodic transmission of SIB1 may include: not transmitting SIB1 according to a semi-statically configured period, and / or not transmitting SIB1 according to a periodic configuration or a periodic configuration corresponding to a dynamic configuration. That is, whether the first cell transmits SIB1 according to the first manner may include two states: the first cell periodically transmitting SIB1 and the first cell aperiodic transmission of SIB1.

[0302] In some embodiments, if the first cell does not send SIB1 in the first manner, it can be understood that the terminal sends SIB1 in the second manner. If the first cell sends SIB1 in the second manner, the first cell periodically sends SIB1.

[0303] In some embodiments, FIG6B shows a schematic diagram of a MIB. For example, the MIB may include a frame number, subcarrier spacing, location of demodulation reference signal type A, PDCCH resources for configuring SIB1, cell barring indicator, and / or intra-frequency cell reselection information.

[0304] In some embodiments, FIG6C shows a schematic diagram of SIB1. For example, SIB1 may include cell selection information, cell access-related information, unified access control type selection auxiliary information, etc. The cell selection information may be used for cell selection by a terminal.

[0305] In some embodiments, Figure 6D shows a schematic diagram of a serving cell common configuration SIB (ServingCelConfigCommonSIB) included in SIB 1. Exemplarily, ServingCelConfigCommonSIB may include common configurations of 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 according to whether the first cell sends SIB1 in the first manner.

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

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

[0310] For example, the first cell periodically broadcasts the MIB. The terminal monitors the SSB of the first cell through cell search or frequency scanning, and based on the SSB, the PBCH in the SSB carries the MIB.

[0311] In some embodiments, based on a verification method of the MIB, it is determined whether the first cell sends SIB1 in a first manner.

[0312] For example, if the first cell sends SIB1 in the first manner, the MIB of the first cell uses the first verification method. If the first cell does not send SIB1 in the first manner, the MIB of the first cell uses the second verification method. At this time, if the terminal successfully verifies the MIB of the first cell using the first verification method, it is determined that the first cell sends SIB1 in the first manner; otherwise, it is determined that the first cell does not send SIB1 in the first manner. 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 send SIB1 in the first manner; otherwise, it is determined that the first cell sends SIB1 in the first manner.

[0313] In some embodiments, whether the first cell sends SIB1 in the first manner is determined based on a check algorithm used by the MIB. For example, different check algorithms may correspond to different polynomials for generating CRC.

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

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

[0316] In some embodiments, whether the first cell sends SIB1 in the first manner is determined based on whether the MIB includes the first bit.

[0317] For example, unused idle bits and / or reserved bits in the MIB may be used as the first bit. The number of first bits may be one or more. Different values ​​of the first bit represent whether the first cell sends SIB1 in the first manner.

[0318] Determine whether the first cell sends SIB1 in the first manner according to the indication content of the second bit included in the MIB.

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

[0320] In some embodiments, when the first cell sends SIB1 in a first manner, it is determined not to select the first cell.

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

[0322] In some embodiments, when the first cell sends SIB1 in a first manner and the terminal has service data to be sent, it is determined not to select the first cell.

[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 may be selected or not.

[0324] In some embodiments, when the first cell sends SIB1 in the first manner and the terminal selects a cell 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, in some embodiments, the first condition is met, and whether to select the 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 performing RRC connection reestablishment.

[0327] In some embodiments, satisfying the first condition may further include: a wireless link failure of the terminal.

[0328] In some embodiments, satisfying the first condition may further include: cell handover failure of the terminal.

[0329] In some embodiments, when the first condition is not met, the terminal may also determine whether to select the first cell based on whether SIB1 is sent in the first manner.

[0330] In other embodiments, when the first condition is not met, the terminal determines whether to select the first cell in a conventional manner. Exemplarily, the terminal determines whether to select the first cell regardless of whether the first cell sends SIB1 in the first manner.

[0331] If the initial access when the terminal is powered on is not the reconstruction of the RRC connection of the terminal, 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, but determine whether to select the first cell based on the signal quality of the first cell and other methods.

[0332] In some embodiments, if the terminal fails due to radio link failure and / or cell handover failure, it means that the RRC connection of the terminal has been disconnected for a period of time, and the terminal may be eager to complete the RRC connection reconstruction for business transmission. At this time, in order to reduce the delay of RRC connection reconstruction and reduce the reconstruction failure caused by the failure to complete the RRC connection reconstruction within the specified time, it can be considered that the first condition is met, and it is necessary to determine whether to select the first cell based on whether the first cell sends SIB1 in the first way. The specified time here can be determined by the operation of timer T311. For example, the terminal starts T311 after the radio link fails or the cell handover fails, and performs cell selection during the operation of T311, and accesses (ie resides) to the selected cell. If T311 times out and the terminal has not completed the RRC connection reconstruction in the selected cell, it means that the terminal RRC connection reconstruction has failed.

[0333] Exemplarily, 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 may access the target cell based on a cell handover procedure, a cell reselection procedure, an RRC reestablishment procedure and / or an initial access procedure.

[0335] It should be noted that the target cell here can also be understood as a suitable cell. The selection process of the suitable cell can be referred to the embodiment corresponding to FIG2A , which will not be repeated here.

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

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

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

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

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

[0341] In some embodiments, for carrier-based 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 the primary secondary cell of the terminal and the first cell may be the regular secondary cell of the terminal.

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

[0343] In some embodiments, the third cell is a cell that sends SIB1 in the first manner.

[0344] It is worth noting that: for the first method, reference can be made to the relevant descriptions of the embodiments corresponding to FIG. 2A and / or FIG. 2B , and specific examples will not be repeated here.

[0345] In some embodiments, the terminal requires information when selecting a first cell to access and / or camp on.

[0346] In some embodiments, the parameters for the terminal to select the first cell to access and / or reside in may include but are not limited to the cell carried in the serving cell common configuration (ServingCellConfigCommon) information element (Information Element, IE).

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

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

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

[0350] Timing Advance Offset configuration (n-TimingAdvanceOffset), used to configure the timing advance of the terminal in the first cell;

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

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

[0353] Physical cell identification;

[0354] Configuration of public channels;

[0355] The configuration of SSB, for example, the transmission period of SSB, the transmission mechanism of SSB and / or the transmission power of SSB, 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 cell;

[0358] Criteria information for selecting the first cell.

[0359] Exemplarily, the criterion information may include: information of the S criterion.

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

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

[0362] Srxlev>0

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

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

[0365] Qrxlevmin - the minimum receive level required by the cell (dBm); 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 value (dBm) allowed on the RACH channel when the terminal accesses the cell;

[0368] P_MAX——The maximum transmit power of the terminal (dBm).

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

[0370] identification information of the third cell;

[0371] SIB1 of the third cell;

[0372] Criteria information for selecting the third cell.

[0373] Exemplarily, the identification information of the third cell is a physical cell identifier and / or a high-layer cell identifier. If the identification information of the third cell is a physical cell identifier, when the terminal finds that a cell MIB is monitored, it can determine whether the cell is the third cell by matching the physical cell identifier.

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

[0375] a physical cell identifier of a third cell;

[0376] Frequency information of 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 information required to access or reside in the first cell, it is determined that the first cell is selected.

[0379] In the embodiment of the present disclosure, since the second information includes the information required (needed) 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, thereby reducing the delay and lowering the failure rate of RRC connection reconstruction.

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

[0381] In some embodiments, for example, the second information includes complete confidence required for one or more terminals to camp on or access the third cell, and when the terminal determines, based on the first information in the embodiment corresponding to FIG. 2A or the MIB in the embodiment corresponding to FIG. 2B , that the first cell sends SIB1 in the first manner and that the first cell belongs to the third cell, the terminal determines to select the first cell. Alternatively, when the terminal determines, based on the first information in the embodiment corresponding to FIG. 2A or the MIB in the embodiment corresponding to FIG. 2B , that the first cell sends SIB1 in the first manner and that the first cell belongs to the third cell, the terminal determines to select the first cell.

[0382] In the embodiment of the present disclosure, not selecting the first cell can reduce the failure rate and delay of RRC connection reestablishment.

[0383] When the first cell sends SIB1 in the first manner and the second information includes partial information required for accessing or residing in the first cell, it is determined not to select the first cell.

[0384] For example, if the second information includes partial information about the terminal accessing or residing in the first cell, some information is still missing, which may still lead to RRC connection reestablishment failure or long RRC connection reestablishment delay. Therefore, in the embodiment of the present disclosure, not selecting the first cell can reduce the failure rate and delay of RRC connection reestablishment.

[0385] For example, if the second information includes the configuration of the SSB and / or the configuration of the common channel of the first cell but lacks the criterion information, it is considered that the second information only includes part of the information required to reside in or access the first cell.

[0386] For another example, the second information includes the criteria information of the first cell, but lacks the SSB configuration and / or the common channel configuration, then it is considered that the second information only includes part of the information required to reside in or access the first cell.

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

[0388] It should be noted that the target cell here can also be understood as a suitable cell. The selection process of the suitable cell can be referred to the embodiment corresponding to FIG2A , which will not be repeated here.

[0389] As shown in FIG3A , an embodiment of the present disclosure provides a cell selection method, which is performed by a terminal. The method includes:

[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 may be used by the terminal to determine whether the first cell sends SIB1 in the 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 Figure 2A.

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

[0395] In this common embodiment, the terminal determines whether to select the first cell according to 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 in the corresponding embodiment of FIG. 2A .

[0397] As shown in FIG3B , an embodiment of the present disclosure provides a cell selection method, which is performed by a terminal. The method includes:

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

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

[0400] In some embodiments, the relevant description of the MIB of the first cell and the first method 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 according to 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 in the corresponding embodiment of Figure 2B.

[0404] As shown in FIG3C , an embodiment of the present disclosure provides a cell selection method, which is performed by a terminal. The method includes:

[0405] S3301: Receive second information.

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

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

[0408] In some embodiments, the relevant description 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 according to 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 in the corresponding embodiment of Figure 2B.

[0412] As shown in FIG4A , an embodiment of the present disclosure provides a cell selection method, which is performed by a second network device of a second cell. The method includes:

[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 may be used by the terminal to determine whether the first cell sends SIB1 in the 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 Figure 2A.

[0418] As shown in FIG4B , an embodiment of the present disclosure provides a cell selection method, which is performed by a second network device of a second cell. The method includes:

[0419] S4201: Send the second information.

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

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

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

[0423] In some embodiments, the third cell is a cell that sends SIB1 in the first manner.

[0424] In some embodiments, the relevant content of the first information and / or the first method can be found in the embodiment corresponding to Figure 2C.

[0425] As shown in FIG4C , an embodiment of the present disclosure provides a cell selection method, which is performed by a first network device in a first cell. The method includes:

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

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

[0428] The verification method can be distinguished by a verification algorithm and / or a verification mask.

[0429] Exemplarily, the verification method may include CRC verification.

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

[0431] In some embodiments, the indication content of the second bit included in the MIB is determined based on whether the first cell sends SIB1 in the 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 referred to the embodiment corresponding to FIG. 2B .

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

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

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

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

[0437] The embodiments of the present disclosure provide that when an RLF or HOF occurs, the terminal can skip the cell that sends SIB on demand when performing cell selection, so as to increase the success rate of RRC connection reestablishment, reduce the service interruption delay during the RRC connection recovery process, and improve user experience.

[0438] Method 1: The current serving cell is configured with a blacklist of cells for cell selection before the failure, and the terminal skips the cells in the blacklist during the cell selection process.

[0439] For terminals in the connected state (RRC_CONNECTED), a cell list is configured through RRC dedicated signaling. The cell list can be identified by PCI and frequency. When the terminal sends an RLF or HOF signal and performs cell selection, the terminal does not consider cells in the cell list as candidate cells for RRC connection reestablishment, or the terminal skips 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 to determine the SIB broadcast status and decides whether to select the cell as the RRC connection reestablishment cell.

[0441] As shown in Figure 6A, for a terminal in the connected state (RRC_CONNECTED), when the terminal sends an RLF or HOF signal and performs cell selection, the terminal obtains the SIB1 broadcast status indication information in the MIB for the candidate cell or when performing measurement. If the SIB1 broadcast status indication information indicates that the cell SIB1 is not broadcast, the terminal will not select the cell as a candidate cell for RRC connection reestablishment, or the terminal will skip evaluating whether the cell meets the S criterion.

[0442] The MIB indicates the SIB1 broadcast status. For CD-SSB or SSB sent on the synchronization grid,

[0443] Option 1: The subcarrier spacing offset (ssb-SubcarrierOffset) of the SSB in the MIB may be used to indicate that RMSI is not included, and SIB1 may be requested, for example, ssb-SubcarrierOffset = 30 for frequency range 1 (FR1) or ssb-SubcarrierOffset = 14 (FR2) 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: A separate CRC is specified for the MIB. This CRC 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 of which indicates that SIB1 is not present but can be requested. Another CRC mask indicates that no SIB1 is sent. A third CRC mask can also be defined to indicate that SIB1 is sent.

[0447] Option 5: The MIB carries an indication information to indicate that there is no SIB to be requested, or there is no SIB, or there is a SIB, etc.

[0448] Solution 3: The current serving cell configures neighboring cell public resource configuration and / or cell selection parameter configuration before failure

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

[0450] PCI and frequency f;

[0451] Cell ID.

[0452] Cell common resource configuration information, such as configuration parameters in ServingCellConfigCommonSIB;

[0453] Cell SIB1;

[0454] Configuration parameters of the S criterion for cell evaluation.

[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 criterion evaluation based on the configuration parameters, and initiates an RRC connection reestablishment process if the criteria are met.

[0456] If the S criterion evaluation parameters are not configured, the S criterion configuration parameters in the serving cell at the time of failure are used to evaluate whether the S criterion of the candidate cell is met. If the S criterion is met, the RRC connection reestablishment process is initiated.

[0457] The embodiment of the present disclosure provides a method for skipping cells that require a request to send SIB1 when RLF / HOF occurs, so as to increase the success rate of RRC connection reestablishment, reduce the service interruption delay during RRC connection recovery, and improve user experience.

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

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

[0460] 3: The current serving cell configures neighboring cell public resource configuration and / or cell selection parameter configuration before the failure.

[0461] In the embodiments of the present disclosure, 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 of other embodiments.

[0462] In the embodiments of the present disclosure, 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 of other embodiments.

[0463] The embodiments of the present disclosure also provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step 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 the various units or modules in the above devices is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above devices, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0465] In the embodiments of the present disclosure, a processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of a hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by 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 to implement the hardware circuit configuration 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 FIG5A , an embodiment of the present disclosure provides a terminal, wherein the terminal includes:

[0467] The processing module 5101 is configured to determine whether to select the first cell according to whether the first cell sends SIB1 in a first manner; sending SIB1 in the first manner includes at least one of the following:

[0468] Send SIB1 based on terminal request;

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

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

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

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

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

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

[0475] In some embodiments, the processing module is configured to determine whether to select the first cell according to whether the first cell sends SIB1 in a first manner if 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 fails;

[0478] The terminal's cell handover failed.

[0479] In some embodiments, the receiving module is configured to 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; the processing module is configured to determine whether the first cell sends SIB1 in the first manner based on the first information.

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

[0481] Physical cell identifier PCI of the cell that does not send SIB1;

[0482] Frequency identification.

[0483] In some embodiments, the receiving module is configured to receive a master information block MIB sent by the first cell;

[0484] The processing module is further configured to determine, according to the MIB, whether the first cell sends SIB1 in the first manner.

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

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

[0487] Determining, according to whether the MIB includes the first bit, whether the first cell sends SIB1 in the first manner;

[0488] Determine whether the first cell sends SIB1 in the first manner according to the indication content of the second bit included in the MIB.

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

[0490] Determining, according to a verification algorithm used by the MIB, whether the first cell sends SIB1 in the first manner;

[0491] Determine whether the first cell sends SIB1 in the first manner according to the check mask used by the MIB.

[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, and determines not to select the first cell;

[0494] 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.

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

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

[0497] The first cell sends SIB1 in the first manner, and the second information includes all information required to access or reside in the first cell, and determines to select the first cell;

[0498] The second information does not include the SIB1 of the first cell and the first cell sends the SIB1 in the first manner, and it is determined that the first cell is not selected;

[0499] The first cell sends SIB1 in a first manner, and the second information includes partial information required for accessing or residing in the first cell, and determines not to select the first cell.

[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 cell;

[0502] Criteria information for selecting the first cell.

[0503] FIG5B is a first network device provided in an embodiment of the present disclosure, wherein the first network device is a network device of a first cell, and the first network device includes:

[0504] The sending module 5201 is configured to send a master information block (MIB) according to whether the first cell sends SIB1 in the first manner. The MIB is used by the 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:

[0505] Send SIB1 based on 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 execute any steps 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 execute 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 execute any receiving-related steps in the cell selection method performed by the first network device.

[0511] As shown in FIG5C , an embodiment of the present disclosure provides a second network device, wherein the second network device is a network device of 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] Send SIB1 based on 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 execute any steps related to information processing in the cell selection method performed by the second network device.

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

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

[0520] Physical cell identifier PCI of the cell that does not send SIB1;

[0521] Frequency identification.

[0522] As shown in FIG5D , an embodiment of the present disclosure provides a second network device, wherein the second network device is a network device of 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 part of the information required for the terminal to access the third cell; the third cell is a cell that sends SIB1 in the first manner; the second information is used by the terminal to select a cell to access; sending SIB1 in the first manner includes at least one of the following:

[0524] Send SIB1 based on 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 execute any steps related to information processing in the cell selection method performed by the second network device.

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

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

[0531] identification information of the third cell;

[0532] SIB1 of the third cell;

[0533] Criteria information for selecting the third cell.

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

[0535] a physical cell identifier of a third cell;

[0536] Frequency information of the third cell.

[0537] An embodiment of the present disclosure further provides a communication device, which may include: one or more processors; wherein the processor is used to call instructions to enable the communication device to execute a cell selection method that can be implemented in any of the aforementioned embodiments.

[0538] 7A and / or 7B , the communication device 8100 further includes one or more memories 8102 for storing instructions. Alternatively, all or part of the memories 8102 may be located outside the communication device 8100.

[0539] The communication device may be the aforementioned terminal and network device. In some embodiments, the network device may be a master node and / or an auxiliary 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 transceiver 8103, and the 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, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit 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 embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 7A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component 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, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0544] 7B is a schematic diagram of the structure of a chip 8200 provided in an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG7B , but the present disclosure is not limited thereto.

[0545] The chip 8200 includes one or more processors 8201 , and the processor 8201 is used to call instructions so that the chip 8200 executes any of the above cell selection methods.

[0546] In some embodiments, chip 8200 further includes one or more interface circuits 8202, which are connected to memory 8203. Interface circuit 8202 can be used to receive signals from memory 8203 or other devices, and can 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 the instructions to processor 8201. Optionally, the terms interface circuit, interface, transceiver pin, and transceiver are interchangeable.

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

[0548] The present disclosure also provides a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but may also be a transient storage medium.

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

[0550] The present disclosure also provides a computer program, which, when executed on a computer, enables the computer to execute any one of the above cell selection methods.

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

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

Claims

1. A cell selection method, wherein, Executed by a terminal, the method includes: Determining whether to select the first cell according to whether the first cell sends the System Information Block SIB1 in a first manner; the sending of the SIB1 in the first manner includes at least one of the following: Sending the SIB1 based on the request of the terminal; Sending the SIB1 based on an on-demand mechanism.

2. The method according to claim 1, wherein The determining whether to select the first cell according to whether the first cell sends the System Information Block SIB1 in a first manner includes: Satisfying a first condition, and determining whether to select the first cell according to whether the first cell sends the System Information Block SIB1 in a first manner.

3. The method according to claim 2, wherein, The first condition includes at least one of the following: Radio Link Failure of the terminal; Cell handover failure of the terminal.

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

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

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

7. The method according to claim 6, wherein, The determining whether the first cell sends the SIB1 in the first manner according to the MIB includes at least one of the following: Determining whether the first cell sends the SIB1 in the first manner according to the verification method of the MIB; Determining whether the first cell sends the SIB1 in the first manner according to whether the MIB contains a first bit; Determining whether the first cell sends the SIB1 in the first manner according to the indication content of a second bit included in the MIB.

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

9. The method according to any one of claims 1 to 8, wherein The determining whether to select the first cell according to whether the first cell sends the System Information Block SIB1 in a first manner includes at least one of the following: When the first cell sends the SIB1 in the first manner, determining not to select the first cell; When the first cell sends the SIB1 in a second manner, determining to select the first cell; the second manner is different from the first manner.

10. According to the method according to any one of claims 1 to 3, wherein, The method further includes: Receiving second information from a second cell; the second information includes at least partial information required for the terminal to access a third cell; the third cell is a cell that sends the SIB1 in the first manner; The determining whether to select the first cell according to whether the first cell sends the System Information Block SIB1 in a first manner includes at least one of the following: If 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, it is determined to select the first cell; 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 not to select the first cell; If the first cell sends the SIB1 in the first manner and the second information includes partial information required to access or camp on the first cell, it is determined not to select the first cell.

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

12. A cell selection method, wherein, Executed by a first network device of a first cell, the method includes: Sending a master information block MIB according to whether the first cell sends a system information block SIB1 in a first manner; the MIB is used for a terminal to determine whether the first cell sends the SIB1 in the first manner; sending the system information block SIB1 in the first manner includes at least one of the following: Sending the SIB1 based on the terminal request; Sending the SIB1 based on an on-demand mechanism.

13. The method according to claim 12, wherein, The method further includes at least one of the following: Determining the verification method of the MIB according to whether the first cell sends the SIB1 in the first manner; Determining whether the MIB contains a first bit according to whether the first cell sends the SIB1 in the first manner; Determining the indication content of a second bit included in the MIB according to whether the first cell sends the SIB1 in the first manner.

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

15. A cell selection method, wherein, Executed by a second network device of a second cell, the method includes: Sending first information to a terminal; the first information is used to indicate a cell that sends a system information block SIB1 in a first manner; sending the system information block SIB1 in the first manner includes at least one of the following: Sending the SIB1 based on the terminal request; Sending the SIB1 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 a cell that does not send the SIB1; Frequency identifier.

17. A cell selection method, wherein, Executed by a second network device of a second cell, the method includes: Sending second information to a terminal; the second information includes at least partial information required for the terminal to access a third cell; the third cell is a cell that sends a system information block SIB1 in a first manner; the second information is used for the terminal to select an access cell; sending the system information block SIB1 in the first manner includes at least one of the following: Sending the SIB1 based on the terminal request; Sending the SIB1 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 cell; The SIB1 of the third cell; The criterion 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 identification of the third cell; The frequency information of the third cell.

20. A terminal, wherein, Including: A processing module, configured to determine whether to select the first cell according to whether the first cell sends the system information block SIB1 in a first manner; the sending of the system information block SIB1 in the first manner includes at least one of the following: Sending the SIB1 based on the terminal request; Sending the SIB1 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: A sending module, configured to send the master information block MIB according to whether the first cell sends the system information block SIB1 in a first manner; the MIB is used for the terminal to determine whether the first cell sends the SIB1 in the first manner; the sending of the system information block SIB1 in the first manner includes at least one of the following: Sending the SIB1 based on the terminal request; Sending the SIB1 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: A sending module, configured to send first information to the terminal; the first information is used to indicate the cell that sends the SIB1 in the first manner; the sending of the system information block SIB1 in the first manner includes at least one of the following: Sending the SIB1 based on the terminal request; Sending the SIB1 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: A sending module, configured to send second information to the terminal; the second information includes at least part of the information required for the terminal to access the third cell; the third cell is the cell that sends the system information block SIB1 in the first manner; the second information is used for the terminal to select the cell to access; the sending of the system information block SIB1 in the first manner includes at least one of the following: Sending the SIB1 based on the terminal request; Sending the SIB1 based on an on-demand mechanism.

24. A communication device, wherein, The communication device includes: One or more processors; Wherein, the processor is used to call instructions to enable the communication device to execute the method described in any one of claims 1 to 11, claims 12 to 14, claims 15 to 16, and / or claims 17 to 19.

25. A storage medium, wherein, The storage medium stores instructions, and when the instructions run on the communication device, the communication device is enabled to execute the method described in any one of claims 1 to 11, claims 12 to 14, claims 15 to 16, and / or claims 17 to 19.

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