WO2025138215A1 - Cell selection method, communication device and storage medium - Google Patents

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

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

In order to achieve network energy saving, in some cases, network devices may not send System Information Block (SIB) periodically or may not send SIB. If network devices do not send or send SIB aperiodically, it may affect the cell access or reselection delay of the terminal.

Summary of the invention

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

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

Whether to select the first cell is determined according to whether the first cell sends SIB1 in a first manner; sending SIB1 in a first manner includes at least one of the following: sending SIB1 based on a terminal request; sending SIB1 based on an on-demand mechanism.

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; 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.

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.

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

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 for the terminal to select a cell to access; sending SIB1 in the first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

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 a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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:

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 a first manner; sending SIB1 in a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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:

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; and sending SIB1 in a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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:

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 for the terminal to select a cell to access; sending SIB1 in the first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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 first to fifth aspects mentioned above.

According to a tenth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the cell selection method provided in any of the first to fifth aspects.

In the technical solution provided by the embodiment of the present disclosure, the terminal determines whether to select the first cell based on whether the first cell sends SIB1 in the first manner, which is equivalent to adding a reference factor of whether the first cell sends SIB1 in the first manner in the process of selecting a serving cell or a resident cell. Exemplarily, if the terminal establishes or reestablishes an RRC connection with the selected cell, the cell that sends SIB1 in the first manner may not be selected, thereby reducing the delay.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, serve to explain the principles of the embodiments of the present disclosure.

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

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

FIG1C is a diagram showing 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;

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

FIG2A is a schematic flow chart of a cell selection method according to an exemplary embodiment;

FIG2B is a schematic flow chart of a cell selection method according to an exemplary embodiment;

FIG2C is a schematic flow chart of a cell selection method according to an exemplary embodiment;

FIG3A is a schematic flow chart of a cell selection method according to an exemplary embodiment;

FIG3B is a schematic flow chart of a cell selection method according to an exemplary embodiment;

FIG3C is a schematic flow chart of a cell selection method according to an exemplary embodiment;

FIG4A is a schematic flow chart of a cell selection method according to an exemplary embodiment;

FIG4B is a schematic diagram of a flow chart of a cell selection method according to an exemplary embodiment;

FIG4C is a schematic flow chart of a cell selection method according to an exemplary embodiment;

FIG5A is a schematic diagram showing the structure of a terminal according to an exemplary embodiment;

FIG5B is a schematic diagram showing the structure of a first network device according to an exemplary embodiment;

FIG5C is a schematic diagram showing the structure of a second network device according to an exemplary embodiment;

FIG5D is a schematic diagram showing the structure of a second network device according to an exemplary embodiment;

FIG6A is a timing diagram of RRC reestablishment according to an exemplary embodiment;

FIG6B is a schematic diagram of a MIB according to an exemplary embodiment;

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

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

FIG7A is a schematic diagram showing the structure of a communication device according to an exemplary embodiment;

FIG. 7B is a schematic structural diagram of a chip according to an exemplary embodiment.

DETAILED DESCRIPTION

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

A first aspect provides a cell selection method, which is performed by a terminal, and the method includes:

Whether to select the first cell is determined according to whether the first cell sends SIB1 in a first manner; sending SIB1 in a first manner includes at least one of the following: sending SIB1 based on a terminal request; sending SIB1 based on an on-demand mechanism.

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, which is equivalent to adding a reference factor of whether the first cell sends SIB1 in the first manner in the process of selecting a serving cell or a resident cell. If the terminal establishes or reestablishes an RRC connection with the selected cell, the cell that sends SIB1 in the first manner may not be selected, thereby reducing the delay.

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.

Based on the above solution, when the first condition is met, whether to select the first cell is determined according to whether the first cell sends SIB1 in the first manner, rather than all cell selections are determined according to whether the first cell sends SIB1 in the first manner, thereby This makes it possible or more likely for the terminal to access or reside in a cell that sends SIB1 in the first manner.

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

The terminal's radio link fails (Radio Link Failure, RLF);

The terminal's cell handover failure (Handover Failure, HOF).

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 in which the terminal is eager to establish a (Radio Resource Control, RRC) connection with the cell or re-establish an RRC connection can be applied to the first condition.

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

Receiving first information from the second cell; the first information is used by the terminal to determine whether the first cell sends SIB1 in a first manner;

It is determined, according to the first information, whether the first cell sends SIB1 in a first manner.

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 by the current cell (ie, the current serving cell or the current camping cell).

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

The physical cell identification (PCI) of the cell that does not send SIB1;

Frequency identification.

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

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

Receiving the MIB sent by the first cell;

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

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

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

Determine, according to the verification method of the MIB, whether the first cell sends SIB1 according to the first method;

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

According to the indication content of the second bit included in the MIB, it is determined whether the first cell sends SIB1 in the first manner.

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.

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

Determine, according to a verification algorithm used by the MIB, whether the first cell sends SIB1 in a first manner;

It is determined whether the first cell sends SIB1 in the first manner according to the check mask used by the MIB.

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 simple implementation.

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:

The first cell sends SIB1 in a first manner, and determines not to select the first cell;

The first cell sends SIB1 in a second manner to determine that the first cell is selected; the second manner is different from the first manner.

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.

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 the information required for the terminal to access a third cell; the third cell is a cell that sends SIB1 in the first manner;

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:

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, and determines to select the first cell;

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;

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.

The above solution specifically defines how the terminal selects a cell in combination with the second information, and is easy to implement.

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:

SIB1 of the first cell;

Criteria information for selecting the first cell.

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

A second aspect provides a cell selection method, wherein the method is performed 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 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:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

Determine a verification method of the MIB according to whether the first cell sends the SIB1 in the first manner;

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

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.

In some embodiments of the second aspect, 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:

Determine a verification algorithm for the MIB according to whether the first cell sends the SIB1 in the first manner;

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

A third aspect provides a cell selection method, wherein the method is performed by a second network device of a second cell, and the method includes:

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 a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

The physical cell identifier PCI of the cell that does not send SIB1;

Frequency identification.

A fourth aspect provides a cell selection method, wherein the method is performed by a second network device of a second cell, and the method includes:

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 for the terminal to select a cell to access; sending SIB1 in the first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

identification information of the third cell;

SIB1 of the third cell;

Criteria information for selecting the third cell.

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

A physical cell identifier of a third cell;

Frequency information of the third cell.

A fifth aspect provides a terminal, comprising:

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 a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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:

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 a first manner; sending SIB1 in a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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:

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; and sending SIB1 in a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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:

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 for the terminal to select a cell to access; sending SIB1 in the first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

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

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.

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.

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 manners of the first to fourth aspects.

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 in the corresponding methods, which will not be repeated here.

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, in a certain embodiment, a solution after removing some steps 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.

In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and/or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

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.

In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "the", "the", etc., may 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 after the article may be understood as a singular expression or a plural expression.

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

In some embodiments, terms such as "at least one of", "one or more", "a plurality of", "multiple" and the like can be used interchangeably.

In some embodiments, "at least one of A and B", "A and/or B", "A in one case, B in another case", "A in one case, B in another case", etc., may include the following technical solutions according to 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); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

In some embodiments, the recording method of "A or B" may include the following technical solutions according to 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). When there are more branches such as A, B, C, etc., the above is also similar.

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 restrictions 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 restrictions should be imposed 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 ordinal numbers, and can be one or more. Taking the "first device" as an example, the number of "devices" can be In addition, the objects modified by different prefixes can be the same or different. For example, if the object described 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 object described is "information", then "the first type of information" and "the second type of information" can be the same information or different information, and their contents can be the same or different.

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.

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

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 lower 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", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

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.

In some embodiments, "network" may be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

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

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 and the like can be used interchangeably.

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 access network device, the core network device, or the network device and the communication between the terminals is replaced by the communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a 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.

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 also be configured to have a structure that has all or part of the functions of the terminal.

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

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

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

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

As shown in Fig. 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.

In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with a communication function, a smart car, a tablet computer, a computer with a 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, and a wireless terminal device in industrial control. At least one of terminal equipment, wireless terminal equipment in a smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in a smart city, and wireless terminal equipment in a smart home, but not limited to these.

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

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 Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (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.

In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between access network devices or within access network devices involved in the embodiments of the present disclosure may become internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

In some embodiments, the access network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit). The CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.

In some embodiments, the core network device may be a device including a first network element, etc., 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).

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. A person skilled in the art 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.

The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A, or part of the subject, but are not limited thereto. The subjects shown in FIG1A are examples, and the communication system may include all or part of the subjects in FIG1A, or may include other subjects other than FIG1A, and the number and form of the subjects are arbitrary, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, which may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the fourth generation mobile communication system (4G), the fifth 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) network, Device to Device (D2D) system, Machine to Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle to-Everything (V2X), system using configuration methods of other resources, next generation systems expanded based on them, and the like. In addition, a plurality of systems may be combined (for example, a combination of LTE and NR).

In some cases, IoT devices are often driven by traditional batteries with limited lifespans, which negatively impacts the user experience. The astronomical growth in the number of IoT devices, coupled with the emergence of a large number of IoT devices, has pushed maintenance expenses, including labor and battery costs, to a whole new level. Billions of traditional batteries are discarded every year, and only a small portion can be effectively recycled, which has a harmful impact on the earth's ecosystem. In some extreme environmental conditions, it can be very challenging to maintain the operation of IoT networks and replace batteries. In this regard, battery-free IoT communications have been proposed to improve network performance and sustainability and expand application scenarios. In addition, battery-free communications are more environmentally friendly and safer for children and the elderly. By removing traditional batteries, device size and cost can be significantly reduced, paving the way for a variety of new applications.

In some embodiments, various low power wide area (LPWA) technologies have been developed, such as Machine Type Communication (MTC), Narrow Band Internet of Things (NB-IoT), Reduced Capability (RedCap), etc., to meet the growing needs of vertical fields. These LPWA technologies achieve low cost, low power consumption and large-scale connectivity, which can meet the requirements of many applications. However, there are still many use cases and applications that cannot be solved in the following situations. First, battery-driven devices are not applicable, such as in extreme environmental conditions (such as high voltage, extremely high/low temperature, humid environment). Second, maintenance-free devices are required (for example, traditional batteries that do not need to be replaced in the device). Finally, ultra-low complexity, very small device size/form factor (such as mm thickness), longer life cycle, etc. are required. Ambient power-enabled IoT is a promising technology that can meet the above unmet needs. An ambient power-enabled IoT device is an IoT device powered by energy harvesting, without a battery or with limited energy storage capacity (such as using a capacitor), and is powered by collecting radio waves, light, motion, heat or any other suitable power source.

The energy obtained from the environment can drive the data transmission and wireless communication of the sensing nodes. The current mainstream low-power IoT communication chips (such as BLE, LoRa, NB-IoT) have a power consumption of tens or even hundreds of milliwatts for transmission and reception, while the energy obtained by environmental energy harvesting is only at the microwatt level, which cannot drive these types of nodes to work. Therefore, a new wireless communication technology is needed to reduce the 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 all things". The methods that can be used include backscatter transmission (Backscatter Communications) is a technology.

The content of cell broadcast in the NR system may include: MIB, SIB1 and other system information (Other System Inforamation, OSI). The RMSI may include at least SIB1.

In some embodiments, the remaining minimum system information (RMSI) may include MIB and SIB1.

As shown in FIG. 1B , the MIB may include configuration information of SIB1. For example, the MIB includes configuration information of scheduling resources. The scheduling resources may include physical downlink control channel (PDCCH) resources. The downlink control information (DCI) sent on the PUCCH resource is used to schedule SIB1. SIB1 can also be used to configure scheduling resources of OSI. In some embodiments, SIB1 may also include information required to access the corresponding cell and unified access control (UAC) parameters.

Exemplarily, SIB2 may include cell reselection information. The cell reselection information is mainly related to the serving cell.

Exemplarily, SIB3 may include reselection information related to the current serving frequency and the same-frequency neighboring cells.

Exemplarily, SIB4 may include reselection information related to other NR frequencies and inter-frequency neighboring cells.

Exemplarily, SIB5 may include Evolved-(Universal Mobile Telecommunications System, UMTS) Universal Terrestrial Radio Access (E-UTRA) frequencies and E-UTRA neighbor cell related reselection information.

Exemplarily, SIB6 may include Emergency Telecommunications Warning System (ETWS) primary notifications.

For example, SIB7 may include ETWS secondary notification.

Exemplarily, SIB8 may include Commercial Mobile Alert System (CMAS) alert notifications.

For example, SIB9 may include information related to positioning system time and world time.

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.

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

The terminal can obtain the resource location of the PDCCH according to 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.

FIG. 1C shows CORESET and SSB patterns of a communication system in different multiplexing modes.

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

In some embodiments, in order to save network energy (NES), the system information sent by the network side will be reduced.

In some embodiments, in addition to sending MIB and SIB1, other SIBs are requested on demand by the network device. That is, when the terminal needs other SIBs, the terminal sends a system information (SI) request to the network device, and the network device determines whether to broadcast the corresponding SIB after receiving the SI request.

The SI request may include: an SI request based on a message 1 (Msg1) of a random access request and/or an SI request based on a random access request. Requested message 3 is the SI request.

In some embodiments, the Msg1-based SI request may use reserved random access preamble (Preamble) and/or random access channel (Random Access Channel, RACH) resources.

In some embodiments, the SI request based on Msg3 does not need to reserve RACH resources and random access preamble.

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

The terminal learns whether to adopt the SI request based on Msg1 or the SI request based on Msg3 by reading the system information.

If the base station provides 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.

After receiving the SI request, the base station may send an SI request confirmation to the terminal.

After receiving the SI request confirmation, the terminal receives SI in the current modification period. The terminal receives SI to know that the modification period ends or SI is received. If RACH fails during the SI request process, the subsequent behavior of the UE depends on the UE implementation.

FIG. 1D shows a method for information interaction between a network device and a terminal, which may include:

Network devices broadcast MIB;

The network device broadcasts SIB1;

The terminal sends an SI request;

Network devices send system information.

Currently, when a wireless link failure or handover failure occurs in a terminal, the terminal selects a suitable target cell for access through the cell selection, and then initiates the RRC connection reconstruction process to the target cell. In the process of initiating RRC connection reconstruction, 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 RRC connection reconstruction (for example, if the RRC connection reconstruction timer times out and the RRC connection reconstruction has not been completed, the terminal RRC connection reconstruction fails) or the RRC connection reconstruction delay is large.

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

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

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

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

In some embodiments, the network device of the second cell sends the first information

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

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

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.

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

In some embodiments, the first information directly or indirectly indicates a cell that sends SIB1 in a first manner.

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

In some embodiments, the first information may include a cell list. The cell list includes one or more cells that send 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.

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.

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

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.

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.

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

The physical cell identifier PCI of the cell that does not send SIB1;

Frequency identification.

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

Frequency layer identification;

Band identification;

Carrier identification;

Frequency point identification, etc.

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.

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

In some embodiments, if the first information includes configuration information that the terminal requests SIB1 from the first cell, it can be considered that the first information implicitly indicates that the first cell sends SIB1 in a first manner. In some embodiments, the SI request for requesting SIB may include but is not limited to the aforementioned SI request based on Msg1, SI request based on Msg3 and/or request based on a wake-up signal (Wake Up Signal, WUS).

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

Send SIB1 based on terminal request;

Send SIB1 based on an on-demand mechanism;

SIB1 is sent aperiodically.

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

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 SIB1 can be actively broadcast.

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.

In some embodiments, non-periodic transmission of SIB1 may include: not transmitting SIB1 according to a semi-statically configured period, and/or not transmitting SIB1 according to a period corresponding to a periodic configuration or a dynamic configuration. That is, whether the first cell transmits SIB1 in a first manner may include: the first cell periodically transmits SIB1 and the first cell non-periodic transmission of SIB1.

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.

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

In some embodiments, the terminal determines whether to select the first cell according to a cell selection procedure.

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

A: Initial cell selection process:

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 in the UTRA band. On each carrier, the UE needs to search for the strongest cell and then select a suitable cell that has been selected and belongs to the PLMN.

B: Cell selection based on stored information:

Cell selection based on stored information requires that the terminal has stored some carrier frequency information and cell parameters such as scrambling codes of candidate cells, which are obtained in the previous measurement control information elements. Once the terminal finds a suitable cell among these cells, it selects the suitable cell. If no suitable cell is found, the initial cell selection process is started.

In some embodiments, the terminal determines whether to select the first cell according to whether the first cell sends SIB1 in a first manner. Exemplarily, the first cell sends the SIB1 in the first manner, and it is determined not to select the first cell. Also exemplarily, the first cell sends the SIB1 in a second manner, and it is determined to select the first cell; the second manner is different from the first manner.

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

In some embodiments, the terminal determines whether the first cell sends SIB1 in a first manner according to the first information.

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 can 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 can 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 the first information and the MIB at the same time, the priority of the MIB broadcast by the first cell is higher than the first information.

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.

In some embodiments, the MIB of the first cell implicitly indicates whether the first cell sends SIB1 in a first manner, for example, When the cell does not send SIB1 in the first manner, the MIB may include PUCCH resources of the scheduling information (e.g., DCI) of SIB1. For another example, when the first cell sends SIB1 in the first manner, the MIB does not include PUCCH resources of the scheduling information (e.g., DCI) of SIB1.

In some embodiments, the terminal may also determine whether the first cell sends SIB1 in the first manner according to the 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.

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.

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

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

In some embodiments, satisfying the first condition may further include: cell switching failure of the terminal.

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.

In some 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 ignores whether the first cell sends SIB1 in a first manner to determine whether to select the first cell.

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.

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 service transmission. At this time, in order to reduce the delay of RRC connection reconstruction and reduce the reconstruction failure caused by the delay in completing 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 according to whether the first cell sends SIB1 in the first manner. The specified time here can be determined by the operation of timer T301 and/or 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. If T301 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. T301 is started after the terminal finds a suitable cell. If the terminal has not yet accessed 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.

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

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

The first information indicates that the first cell does not send SIB1 in the first manner, and determines to select the first cell;

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

The first information indicates that the first cell does not send SIB1 in the second manner, and determines not to select the first cell.

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.

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

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

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

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

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

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

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

Exemplarily, different verification methods correspond to different verification algorithms and/or verification parameters.

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

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.

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

Send SIB1 based on terminal request;

Send SIB1 based on an on-demand mechanism;

SIB1 is sent aperiodically.

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

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 SIB1 can be actively broadcast.

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.

In some embodiments, non-periodic transmission of SIB1 may include: not transmitting SIB1 according to a semi-statically configured period, and/or not transmitting SIB1 according to a period corresponding to a periodic configuration or a dynamic configuration. That is, whether the first cell transmits SIB1 in a first manner may include: the first cell periodically transmits SIB1 and the first cell non-periodic transmission of SIB1.

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.

In some embodiments, Fig. 6B is a schematic diagram of a MIB. Exemplarily, the MIB may include a frame number, a subcarrier spacing, a location of a demodulation reference signal type A, a PDCCH resource for configuring SIB1, a cell barring indicator and/or intra-frequency cell reselection information, etc.

In some embodiments, Fig. 6C is a schematic diagram of a SIB1. Exemplarily, 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 of a terminal.

In some embodiments, Fig. 6D is a schematic diagram of a serving cell common configuration SIB (ServingCelConfigCommonSIB) included in SIB1. Exemplarily, ServingCelConfigCommonSIB may include common configurations of various cells, such as common channel configurations, common channel measurement configurations, and the like.

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

In some embodiments, the terminal determines whether to select the first cell according to whether the first cell sends SIB1 in the first manner.

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

In some embodiments, the terminal determines whether the first cell sends SIB1 in the first manner according to the MIB of the first cell.

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

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

For example, if the first cell sends SIB1 in the first way, the MIB of the first cell uses the first verification method. If the first cell does not send SIB1 in the first way, 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 way, otherwise it is determined that the first cell does not send SIB1 in the first way. 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 way, otherwise it is determined that the first cell sends SIB1 in the first way.

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

In some embodiments, whether the first cell sends SIB1 in the first manner is determined according to a check mask used by the MIB.

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

In some embodiments, whether the first cell sends SIB1 in the first manner is determined according to whether the MIB includes the first bit.

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

According to the indication content of the second bit included in the MIB, it is determined whether the first cell sends SIB1 in the first manner.

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. According to the indication content of the second bit, it is determined whether the first cell sends SIB1 in the first manner.

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

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

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.

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.

In some embodiments, when the first cell sends SIB1 in a first manner and the terminal selects a cell due to a radio link failure or a cell switching failure during service transmission, it is determined not to select the first cell.

In some embodiments, in some embodiments, the first condition is met, and whether to select the first cell is determined according to whether the first cell sends SIB1 in a first manner.

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

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

In some embodiments, satisfying the first condition may further include: cell switching failure of the terminal.

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.

In some 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 by ignoring whether the first cell sends SIB1 in a first manner.

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.

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 some time, and the terminal may be eager to complete the RRC connection reconstruction for service transmission. At this time, in order to reduce the delay of RRC connection reconstruction and reduce the reconstruction failure caused by the delay in completing the RRC connection reconstruction within the prescribed 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 prescribed 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.

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.

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

It is worth noting that the target cell here can also be understood as a suitable cell. The selection process of the suitable cell can refer to the embodiment corresponding to FIG. 2A , which will not be repeated here.

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

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

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

In some embodiments, the second cell may be a service cell for a terminal in a connected state, a camping cell for a terminal in an idle state/inactive state, or the like.

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 sends SSB.

In some embodiments, for the scenario of carrier connection and/or dual connectivity, 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.

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

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

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

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

In some embodiments, 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).

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

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

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

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

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

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:

Physical cell identification;

Configuration of common channels;

The configuration of SSB, for example, the transmission period of SSB, the transmission mechanism of SSB and/or the transmission power of SSB, etc.

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

SIB1 of the first cell;

Criteria information for selecting the first cell.

Exemplarily, the criterion information may include: information of S criterion.

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

For example, taking the cell as a TDD cell, the criteria for cell selection are as follows:

Srxlev>0

Among them, Srxlev = Qrxlevmeas-Qrxlevmin-Pcompensation (dB),

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

Qrxlevmin——the minimum receiving level value (dBm) required by the cell; Qrxlevmin can be understood as the threshold at which the terminal can access or reselect the cell;

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

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

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

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

identification information of the third cell;

SIB1 of the third cell;

Criteria information for selecting the third cell.

Exemplarily, the identification information of the third cell is a physical cell identification and/or a high-layer cell identification. If the identification information of the third cell is a physical cell identification, 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 identification.

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

A physical cell identifier of a third cell;

Frequency information of the third cell.

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

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.

In the disclosed embodiment, since the second information includes the information required (needed) for accessing 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 the failure rate of RRC connection reconstruction.

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

In some embodiments, for example, the second information includes complete confidence required for one or more terminals to reside in or access the third cell, and the terminal determines that the first cell sends SIB1 in the first manner and the first cell belongs to the third cell according to the first information in the embodiment corresponding to FIG. 2A or according to the MIB in the embodiment corresponding to FIG. 2B, then the first cell is selected. Alternatively, when the terminal determines that the first cell sends SIB1 in the first manner and the first cell belongs to the third cell according to the first information in the embodiment corresponding to FIG. 2A or according to the MIB in the embodiment corresponding to FIG. 2B, then the first cell is selected.

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

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.

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 will still lead to the problem of RRC connection reestablishment failure or long delay in RRC connection reestablishment. Therefore, in the embodiment of the present disclosure, not selecting the first cell can reduce the failure rate and delay of RRC connection reestablishment.

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.

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

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

It is worth noting that the target cell here can also be understood as a suitable cell. The selection process of the suitable cell can refer to the embodiment corresponding to FIG. 2A , which will not be repeated here.

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

S3101: Receive first information.

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

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

In some embodiments, the relevant content of the first information and/or the first method can refer to the embodiment corresponding to Figure 2A.

S3102: Determine whether to select the first cell.

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.

In some embodiments, any optional implementation of S3102 can refer to the optional implementation of S2102 of the corresponding embodiment of FIG. 2A .

As shown in FIG. 3B , an embodiment of the present disclosure provides a cell selection method, which is performed by a terminal. The method includes:

S3201: Receive the MIB of the first cell.

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

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.

S3202: Determine whether to select the first cell.

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.

In some embodiments, any optional implementation of S3202 can refer to the optional implementation of S2202 of the corresponding embodiment of FIG. 2B .

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

S3301: Receive second information.

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

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

In some embodiments, the relevant description of the second information and the first method can refer to the embodiment corresponding to Figure 2B.

S3302: Determine whether to select the first cell.

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.

In some embodiments, any optional implementation of S3302 can refer to the optional implementation of S2202 of the corresponding embodiment of Figure 2B.

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:

S4101: Send the first information.

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

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

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

In some embodiments, the relevant content of the first information and/or the first method can refer to the embodiment corresponding to Figure 2A.

As shown in FIG. 4B , an embodiment of the present disclosure provides a cell selection method, which is performed by a second network device of a second cell, and the method includes:

S4201: Send the second information.

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

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

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

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

In some embodiments, the relevant content of the first information and/or the first method can refer to the embodiment corresponding to Figure 2C.

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

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

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

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

Exemplarily, the verification method may include a CRC verification.

In some embodiments, whether the MIB includes the first bit is determined according to whether the first cell sends SIB1 in a first manner.

In some embodiments, the indication content of the second bit included in the MIB is determined according to whether the first cell sends SIB1 in the first manner.

In some embodiments, the association relationship 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 .

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

S4302: Send the MIB of the first cell.

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

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.

The disclosed embodiment provides that when 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 RRC connection recovery, and improve user experience.

Mode 1: The current serving cell is configured with a blacklist cell for cell selection before failure, and the terminal skips the cells in the blacklist during cell selection.

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 RLF or HOF, etc., and performs cell selection, the terminal will not use the cells in the cell list as candidate cells for RRC connection reestablishment, or the terminal skips evaluating whether the cells in the cell list meet the S criterion.

Method 2: The terminal autonomously detects the MIB of the target cell selected by the cell to determine the SIB broadcast status and decide whether to select the cell as the RRC connection reestablishment cell.

As shown in FIG6A , for a terminal in a connected state (RRC_CONNECTED), when the terminal sends RLF or HOF, etc., and performs cell selection, the terminal obtains SIB1 broadcast status indication information in the MIB for a 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 use the cell as a candidate cell for RRC connection reestablishment, or the terminal skips evaluating whether the cell meets the S criterion.

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

Option 1: The subcarrier spacing offset (ssb-SubcarrierOffset) of the SSB in the MIB can be used to indicate that RMSI is not included and SIB1 can be requested, for example, ssb-SubcarrierOffset = 30 for frequency range 1 (FR1) or ssb-SubcarrierOffset = 14 (FR2) for frequency range 2 (FR2).

Option 2: The spare bit in the MIB can also indicate that SIB1 is not available but can be requested.

Option 3: Specify a separate CRC for the MIB, which is different from the traditional CRC and is used to indicate that there is no SIB1 but it can be requested. The new CRC can be calculated based on the original CRC, for example, the new CRC is equal to the original CRC+1.

Option 4: Define at least two CRC masks, one of which indicates that there is no SIB1 but it 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.

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

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

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

PCI and frequency f;

Cell ID.

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

Cell SIB1;

Configuration parameters of the S criterion for cell evaluation.

When the terminal sends RLF or HOF, during cell selection, if the target cell is a cell in the cell list, the terminal performs S criterion evaluation according to the configuration parameters, and initiates the RRC connection reestablishment process if the criteria are met.

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.

The disclosed embodiment provides that for cells that require a request to send SIB1, when RLF/HOF occurs, the terminal can skip such cells when performing cell selection, thereby increasing the success rate of RRC connection reestablishment, reducing the service interruption delay during RRC connection recovery, and improving user experience.

1: The current serving cell is a blacklist cell in the cell selection configuration before the failure. The terminal skips the cells in the blacklist during the cell selection process.

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

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

In the embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations of other embodiments.

In the embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations of other embodiments.

The embodiments of the present disclosure also provide a device for implementing any of the above methods, for example, a device is provided, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods. For another example, another device is provided, including a unit or module for implementing each step performed by a network device (for example, an access network device, or a core network device, etc.) in any of the above methods.

It should be understood that the division of the units or modules in the above device is only a division of logical functions, which can be fully or partially integrated into one physical entity or physically separated in actual implementation. In addition, the units or modules in the device can 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 instructions are stored in the memory. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, 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 inside the device or a memory outside the device. Alternatively, the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be implemented by designing the hardware circuits. The hardware circuits may be understood as one or more processors; for example, in one implementation, the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules may be implemented by designing the logical relationship of the components in the circuits; for another example, in another implementation, the hardware circuits may be implemented by programmable logic devices (PLDs), and Field Programmable Gate Arrays (FPGAs) may be used as an example, which may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuring the configuration files, thereby implementing the functions of some or all of the above units or modules. All units or modules of the above devices may be implemented in the form of software called by the processor, or in the form of hardware circuits, or in the form of software called by the processor, and the remaining part may be implemented in the form of hardware circuits.

In the disclosed embodiments, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as 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 may 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.

As shown in FIG5A , an embodiment of the present disclosure provides a terminal, wherein the terminal includes:

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 a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

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

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.

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

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

In some embodiments, the processing module is configured to meet a first condition and determine whether to select the first cell according to whether the first cell sends SIB1 in a first manner.

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

The terminal's wireless link fails;

The terminal's cell handover fails.

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.

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

The physical cell identifier PCI of the cell that does not send SIB1;

Frequency identification.

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

The processing module is also configured to determine, according to the MIB, whether the first cell sends SIB1 in a first manner.

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

Determine, according to the verification method of the MIB, whether the first cell sends SIB1 according to the first method;

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

According to the indication content of the second bit included in the MIB, it is determined whether the first cell sends SIB1 in the first manner.

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

Determine, according to a verification algorithm used by the MIB, whether the first cell sends SIB1 in a first manner;

It is determined whether the first cell sends SIB1 in the first manner according to the check mask used by the MIB.

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

The first cell sends SIB1 in a first manner, and determines not to select the first cell;

The first cell sends SIB1 in a second manner to determine that the first cell is selected; the second manner is different from the first manner.

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;

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

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, and determines to select the first cell;

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;

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.

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

SIB1 of the first cell;

Criteria information for selecting the first cell.

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:

The sending module 5201 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 a first manner; sending SIB1 in a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

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.

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.

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

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:

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; and sending SIB1 in a first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

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.

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.

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.

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

The physical cell identifier PCI of the cell that does not send SIB1;

Frequency identification.

As shown in FIG. 5D , 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:

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 for the terminal to select a cell to access; sending SIB1 in the first manner includes at least one of the following:

Send SIB1 based on terminal request;

SIB1 is sent based on an on-demand mechanism.

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

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.

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.

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.

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

identification information of the third cell;

SIB1 of the third cell;

Criteria information for selecting the third cell.

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

A physical cell identifier of a third cell;

Frequency information of the third cell.

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 so that the communication device executes a cell selection method that can be implemented in any of the aforementioned embodiments.

7A and/or 7B, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memory 8102 may also be outside the communication device 8100.

The communication device may be the aforementioned terminal and network device. In some embodiments, the network device may be a primary node and/or an auxiliary node.

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 executed by the transceiver 8103, and the other steps are executed by the processor 8101.

In some embodiments, the transceiver may include a receiver and a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

Optionally, the communication device 8100 further includes one or more interface circuits 8104, which are connected to the memory 8102. The interface circuit 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 circuit 8104 can read instructions stored in the memory 8102 and send the instructions to the processor 8101.

The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in 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, and optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiving device; Mobile phones, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.; (6) Others, etc.

7B is a schematic diagram of the structure of a chip 8200 provided in an embodiment of the present disclosure. In the case where the communication device 8100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 8200 shown in FIG. 7B , but the present invention is not limited thereto.

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.

In some embodiments, the chip 8200 further includes one or more interface circuits 8202, which are connected to the memory 8203. The interface circuit 8202 can be used to receive signals from the memory 8203 or other devices, and the interface circuit 8202 can be used to send signals to the memory 8203 or other devices. For example, the interface circuit 8202 can read the instructions stored in the memory 8203 and send the instructions to the processor 8201. Optionally, the terms such as interface circuit, interface, transceiver pin, and transceiver can be replaced with each other.

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

The present disclosure also provides a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 8100, the communication device 8100 executes 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 it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but it can also be a temporary storage medium.

The present disclosure also provides a program product, and when the program product is executed by the communication device 8100, the communication device 8100 executes any one of the above cell selection methods. Optionally, the program product is a computer program product.

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.

Those skilled in the art will readily appreciate other implementations of the disclosed embodiments after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the disclosed embodiments, which follow the general principles of the disclosed embodiments and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered merely exemplary, and the true scope and spirit of the disclosed embodiments are indicated by the following claims.

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 may 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 (25)

A cell selection method, wherein the method is performed by a terminal, and 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; sending the system information block SIB1 in a first manner includes at least one of the following: Sending the SIB1 based on the terminal request; The SIB1 is sent based on an on-demand mechanism. 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 the first manner comprises: If the first condition is met, it is determined whether to select the first cell according to whether the first cell sends the system information block SIB1 in a first manner. The method according to claim 2, wherein the first condition comprises at least one of the following: The wireless link of the terminal fails; The cell handover of the terminal fails. The method according to any one of claims 1 to 3, wherein the method further comprises: receiving first information from a second cell; the first information is used by the terminal to determine whether the first cell sends SIB1 in the first manner; Determine whether the first cell sends the SIB1 in the first manner according to the first information. The method according to claim 4, wherein the first information includes at least one of the following: The physical cell identifier PCI of the cell that does not send the SIB1; Frequency identification. The method according to any one of claims 1 to 3, wherein the method further comprises: Receiving a master information block MIB sent by the first cell; Determine whether the first cell sends the SIB1 according to the first manner according to the MIB. The method according to claim 6, wherein the determining, according to the MIB, whether the first cell sends the SIB1 in the first manner comprises at least one of the following: Determining, according to the verification method of the MIB, whether the first cell sends the SIB1 in a first manner; Determining, according to whether the MIB includes the first bit, whether the first cell sends the SIB1 in a first manner; Determine whether the first cell sends the SIB1 in a first manner according to the indication content of the second bit included in the MIB. The method according to claim 7, wherein the determining, according to the verification method of the MIB, whether the first cell sends the SIB1 in a first manner comprises at least one of the following: Determining, according to a verification algorithm used by the MIB, whether the first cell sends the SIB1 in a first manner; Determine whether the first cell sends the SIB1 in a first manner according to a check mask used by the MIB. 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 the first manner comprises at least one of the following: The first cell sends the SIB1 according to the first manner, and determines not to select the first cell; The first cell sends the SIB1 in a second manner to determine the selection of the first cell; the second manner is different from the first manner. The method according to any one of claims 1 to 3, wherein the method further comprises: receiving second information from a second cell; the second information includes at least part of the 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 the first manner includes at least one of the following: The first cell sends the SIB1 in the first manner, and the second information includes all information required to access or reside in the first cell, and determines to select the first cell; 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; The first cell sends the SIB1 in the 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. The method according to claim 10, wherein the information required to access or reside in the first cell includes at least one of the following: SIB1 of the first cell; Criteria information for selecting the first cell. A cell selection method, wherein the method is performed 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 the system information block SIB1 in a first manner; the MIB is used by the terminal to determine whether the first cell sends the SIB1 in a first manner; sending the system information block SIB1 in a first manner includes at least one of the following: Sending the SIB1 based on the terminal request; The SIB1 is sent based on an on-demand mechanism. The method according to claim 12, wherein the method further comprises at least one of the following: Determining a verification method of the MIB according to whether the first cell sends SIB1 in a first manner; Determining whether the MIB includes a first bit according to whether the first cell sends SIB1 in a first manner; The indication content of the second bit included in the MIB is determined according to whether the first cell sends SIB1 in the first manner. The method according to claim 12, wherein the determining the verification method of the MIB according to whether the first cell sends SIB1 in a first manner comprises at least one of the following: Determining a verification algorithm for the MIB according to whether the first cell sends SIB1 in a first manner; The check mask of the MIB is determined according to whether the first cell sends SIB1 in a first manner. A cell selection method, wherein the method is performed 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 a system information block SIB1 in a first manner; sending the system information block SIB1 in a first manner includes at least one of the following: Sending the SIB1 based on the terminal request; The SIB1 is sent based on an on-demand mechanism. The method according to claim 15, wherein the first information includes at least one of the following: The physical cell identifier PCI of the cell that does not send the SIB1; Frequency identification. A cell selection method, wherein the method is performed by a second network device of a second cell, and the method includes: Sending second information to the terminal; the second information includes at least part of the 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 a cell to access; 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; The SIB1 is sent based on an on-demand mechanism. The method according to claim 17, wherein the second information includes at least one of the following: identification information of the third cell; SIB1 of the third cell; Criteria information for selecting the third cell. The method according to claim 18, wherein the identification information of the third cell includes at least one of the following: A physical cell identifier of the third cell; The frequency information of the third cell. A terminal, comprising: The processing module is 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; sending the system information block SIB1 in a first manner includes at least one of the following: Sending the SIB1 based on the terminal request; The SIB1 is sent based on an on-demand mechanism. A first network device, wherein the first network device is a network device of a first cell, and the first network device includes: A sending module is configured to send 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 by the terminal to determine whether the first cell sends SIB1 in a first manner; and sending the system information block SIB1 in a first manner includes at least one of the following: Sending the SIB1 based on the terminal request; The SIB1 is sent based on an on-demand mechanism. A second network device, wherein the second network device is a network device of a second cell, and the second network device includes: The sending module is configured to send first information to the terminal; the first information is used to indicate a cell that sends the SIB1 in the first manner; and 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; The SIB1 is sent based on an on-demand mechanism. A second network device, wherein the second network device is a network device of a second cell, and the second network device includes: A sending module is configured to send second information to a terminal; the second information includes at least part of the 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 a 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; The SIB1 is sent based on an on-demand mechanism. A communication device, wherein the communication device comprises: one or more processors; 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. A storage medium, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes 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.