System information block (SIB) request method, communication device, and storage medium

Abstract

Embodiments of the present disclosure provide a system information block (SIB) request method, a communication device, and a storage medium. The SIB request method comprises: on the basis of whether a first cell periodically sends an SIB, determining a mode for acquiring the SIB of the first cell.

Description

System Information Block (SIB) request methods, communication devices, and storage media Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a method for requesting a System Information Block (SIB), a communication device, and a storage medium. Background Technology

[0002] Network energy saving (NES) technology has been proposed to reduce energy consumption at base stations and on the network side. NES technology limits the transmission and reception of network devices in the time domain and increases the sleep time of network devices, thereby achieving the goal of energy saving.

[0003] Summary of the Invention

[0004] This disclosure provides an SIB request method, communication device, and storage medium.

[0005] According to a first aspect of the present disclosure, a method for requesting an Information System Block (SIB) is provided, executed by a terminal, the method comprising: determining a method for obtaining the SIB of a first cell based on whether a first cell periodically sends SIBs.

[0006] According to a second aspect of the embodiments of this disclosure, a method for requesting an SIB is provided, wherein...

[0007] The method, performed by the first network device of the first cell, includes:

[0008] The receiving terminal sends a first request; the first request is used by the terminal to request the System Information Block (SIB) of the first cell;

[0009] Based on the first request, the SIB requested by the terminal is sent.

[0010] According to a third aspect of the present disclosure, a method for requesting System Information B (SIB) is provided, wherein the request is performed by a second network device of a second cell, the method comprising:

[0011] The receiving terminal sends a second request when it has a cell reselection requirement; the second request is used by the terminal to request the first cell to send a System Information Block (SIB).

[0012] According to a fourth aspect of the present disclosure, a method for requesting System Information B (SIB) is provided, wherein the request is performed by a second network device of a second cell, the method comprising:

[0013] The cell configuration of the first cell is sent to the terminal; the cell configuration is used by the terminal to determine whether the first cell periodically sends SIBs.

[0014] According to a fifth aspect of the present disclosure, a terminal is provided, comprising:

[0015] The processing module is configured to determine the method for obtaining the SIB of the first cell based on whether the first cell periodically sends the SIB.

[0016] According to a sixth aspect of the present disclosure, a first network device is provided to perform the method comprising:

[0017] The receiving module is configured to receive a first request sent by the terminal; the first request is used by the terminal to request the System Information Block (SIB) of the first cell.

[0018] The sending module is configured to send the SIB requested by the terminal in accordance with the first request.

[0019] According to a seventh aspect of the present disclosure, a second network device is provided, comprising:

[0020] The receiving module is configured to receive a second request sent by the terminal when it has a cell reselection requirement; the second request is used by the terminal to request the first cell to send a System Information Block (SIB).

[0021] According to an eighth aspect of the present disclosure, a second network device is provided, comprising:

[0022] The sending module is configured to send the cell configuration of a first cell to the terminal; the cell configuration is at least used by the terminal to determine whether the first cell periodically sends SIBs.

[0023] According to a ninth aspect of the present disclosure, a terminal is provided, comprising:

[0024] The processing module is configured to determine the method for obtaining the SIB of the first cell based on whether the first cell periodically sends the SIB.

[0025] According to a tenth aspect of the present disclosure, a first network device is provided to perform the method comprising:

[0026] The receiving module is configured to receive a first request sent by the terminal; the first request is used by the terminal to request the System Information Block (SIB) of the first cell.

[0027] The sending module is configured to send the SIB requested by the terminal in accordance with the first request.

[0028] According to an eleventh aspect of the present disclosure, a second network device is provided, comprising:

[0029] The receiving module is configured to receive a second request sent by the terminal when it has a cell reselection requirement; the second request is used by the terminal to request the first cell to send a System Information Block (SIB).

[0030] According to a twelfth aspect of the present disclosure, a second network device is provided, comprising:

[0031] The sending module is configured to send the cell configuration of a first cell to the terminal; the cell configuration is at least used by the terminal to determine whether the first cell periodically sends SIBs.

[0032] According to a thirteenth aspect of the present disclosure, a communication device is provided, wherein the communication device includes: one or more processors; wherein the processors are configured to invoke instructions to cause the communication device to execute a request method for an Information System Block (SIB) provided by any of the technical solutions of the first to fourth aspects.

[0033] According to a fourteenth aspect of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions that, when executed on a communication device, cause the communication device to execute a request method for an Information System Block (SIB) provided by any of the first to fourth aspects.

[0034] The technical solution provided in this disclosure allows the terminal to determine the method for obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs. This reduces the latency for the terminal to obtain the SIB of the first cell compared to waiting in an incorrect manner. It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the embodiments of this disclosure. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of embodiments of this disclosure.

[0036] Figure 1A is a schematic diagram of the architecture of a communication system according to an exemplary embodiment;

[0037] Figure 1B is a schematic diagram illustrating a MIB and SIB according to an exemplary embodiment;

[0038] Figure 1C is a diagram illustrating the resource location relationship between a Synchronization Signal and (Physical Broadcast Channel, PBCH) block (SSB) and a Control Resource Set (CORESET) according to an exemplary embodiment.

[0039] Figure 1D is an interactive schematic diagram of System Information (SI) according to an exemplary embodiment;

[0040] Figure 2A is a flowchart illustrating a method for requesting an SIB according to an exemplary embodiment;

[0041] Figure 2B is a flowchart illustrating a method for requesting an SIB according to an exemplary embodiment;

[0042] Figure 2C is a flowchart illustrating a SIB request method according to an exemplary embodiment;

[0043] Figure 3A is a flowchart illustrating a method for requesting an SIB according to an exemplary embodiment;

[0044] Figure 3B is a flowchart illustrating a method for requesting an SIB according to an exemplary embodiment;

[0045] Figure 4 is a flowchart illustrating a SIB request method according to an exemplary embodiment;

[0046] Figure 5 is a flowchart illustrating a SIB request method according to an exemplary embodiment;

[0047] Figure 6A is a flowchart illustrating a method for requesting an SIB according to an exemplary embodiment;

[0048] Figure 6B is a flowchart illustrating a method for requesting an SIB according to an exemplary embodiment;

[0049] Figure 6C is a flowchart illustrating a method for requesting an SIB according to an exemplary embodiment;

[0050] Figure 6D is a schematic diagram of a MAC CE structure according to an exemplary embodiment;

[0051] Figure 7A is a schematic diagram of the structure of a terminal according to an exemplary embodiment;

[0052] Figure 7B is a schematic diagram of the structure of a first network device according to an exemplary embodiment;

[0053] Figure 7C is a schematic diagram of the structure of a second network device according to an exemplary embodiment;

[0054] Figure 7D is a schematic diagram of the structure of a second network device according to an exemplary embodiment;

[0055] Figure 8A is a schematic diagram of the structure of a communication device according to an exemplary embodiment;

[0056] Figure 8B is a schematic diagram of the structure of a chip according to an exemplary embodiment. Detailed Implementation

[0057] This disclosure provides a method for requesting an Information System Block (SIB), a communication device, a communication system, and a storage medium.

[0058] The first aspect provides a method for requesting an Information System Block (SIB), executed by a terminal, the method comprising: determining the method for obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs.

[0059] Based on the above scheme, the terminal will determine the method of obtaining the SIB of the first cell based on whether the first cell periodically sends the SIB. Compared with waiting to receive the SIB from the first cell in an incorrect way, the delay of the terminal obtaining the SIB of the first cell can be reduced.

[0060] In some embodiments of the first aspect, determining the method of obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs includes: if a first condition is met, determining the method of obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs;

[0061] The first condition includes at least one of the following:

[0062] The terminal has a need for cell reselection;

[0063] The terminal recovered from the overlay vulnerability;

[0064] The terminal received a system broadcast change instruction from the first cell;

[0065] The terminal has positioning requirements;

[0066] Paging downlink control information DCI indication system information for the first cell;

[0067] The validity period of the SIB in the first cell of the terminal storage has expired.

[0068] The above scheme specifies the methods by which a terminal determines the SBI of the first cell based on whether it periodically sends SIBs in which scenarios.

[0069] In some embodiments of the first aspect, determining the method of obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs includes at least one of the following: if the terminal has a cell reselection requirement and the first cell does not periodically send SIBs, the terminal determines to send a first request to the first cell; the first request is used to request the SIB of the first cell; if the terminal has a cell reselection requirement and the first cell does not periodically send SIBs, the terminal determines to send a second request to the second cell; the second request is used to request the SIB of the first cell.

[0070] In some embodiments of the first aspect, when a terminal has a cell reselection requirement and a first cell non-periodicly transmits an SIB, the terminal sends a first request to the first cell requesting the first cell SIB, including at least one of the following:

[0071] The terminal has a cell reselection requirement and the first cell sends SIBs non-periodically. It is determined to send a first request to the first cell before reselecting to the first cell.

[0072] The terminal has a cell reselection requirement and the first cell sends SIBs non-periodically. It determines that after reselecting to the first cell, it will send a first request to the first cell.

[0073] In some embodiments of the first aspect, where the terminal has a cell reselection requirement and the first cell periodically transmits an SIB, determining to send a first request to the first cell to request the first cell SIB includes:

[0074] The terminal has a cell reselection requirement and the first cell sends an SIB non-periodically. The terminal determines to send a random access request to the first cell. The random access request includes a first random access preamble indicating the request SIB.

[0075] In some embodiments of the first aspect,

[0076] The method also includes:

[0077] Receive the random access response sent by the first network device in the first cell;

[0078] The first network device determines whether it has received the first request based on the random access response.

[0079] In some embodiments of the first aspect,

[0080] The method also includes:

[0081] After sending the first request, listen for the requested SIBs on the first cell according to the configuration of periodically sending SIBs;

[0082] Whether the first network device has received the first request is determined based on whether the requested SIB is detected.

[0083] In some embodiments of the first aspect,

[0084] The method also includes:

[0085] In response to determining that the first network device has not received the first request, the system determines to increase the transmit power of the random access request and continues to send the random access request.

[0086] In some embodiments of the first aspect,

[0087] The method also includes:

[0088] When the transmit power of the random access request reaches the maximum transmit power and / or the number of transmissions of the first random access preamble reaches the maximum number of transmissions, it is determined to stop sending random access requests.

[0089] In some embodiments of the first aspect,

[0090] The first request and / or the second request includes at least one of the following:

[0091] The signage for the first residential area;

[0092] The identification information of the requested SIB.

[0093] In some embodiments of the first aspect,

[0094] The method also includes at least one of the following:

[0095] Based on the Master Information Block (MIB) of the first cell, determine whether the first cell periodically sends an SIB;

[0096] Based on the cell configuration of the first cell sent by the second cell, determine whether the first cell periodically sends SIBs.

[0097] In some embodiments of the first aspect, determining whether the first cell periodically transmits an SIB based on the Master Information Block (MIB) of the first cell includes at least one of the following:

[0098] Whether the first cell periodically sends an SIB depends on whether the MIB of the first cell contains the first bit.

[0099] Based on the verification method used by the MIB of the first cell, determine whether the first cell periodically sends SIB;

[0100] Based on the indication content of the second bit in the MIB of the first cell, determine whether the first cell periodically sends an SIB.

[0101] In some embodiments of the first aspect,

[0102] Based on the verification method used by the MIB of the first cell, determine whether the first cell periodically sends SIBs, including at least one of the following:

[0103] Based on the verification algorithm used by the MIB of the first cell, determine whether the first cell periodically sends SIB;

[0104] Based on the check mask used by the MIB of the first cell, determine whether the first cell periodically sends an SIB.

[0105] In some embodiments of the first aspect,

[0106] The community configuration includes at least one of the following:

[0107] The first information indicates whether the first cell should periodically send SIBs;

[0108] The second piece of information indicates whether the first cell should send SIBs based on an on-demand mechanism;

[0109] The third information is used by the terminal to send a first request to the first cell, and / or the third information is used by the terminal to send a second request to the second cell; the first request and / or the second request are used by the terminal to request an SIB from the first cell.

[0110] The second aspect provides a method for requesting System Information B (SIB), wherein the request is executed by a first network device of a first cell, and the method includes:

[0111] The terminal receives a first request; the first request is used by the terminal to request a System Information Block (SIB) of the first cell.

[0112] Based on the first request, send the SIB requested by the terminal.

[0113] In some embodiments of the second aspect, the first request includes: a random access request; the random access request includes: a first random access preamble indicating the request SIB.

[0114] In some embodiments of the second aspect, the method further includes: sending a request response to a terminal; the request response being used by the terminal to determine whether the first network device has received the first request.

[0115] In some embodiments of the second aspect, the request response includes: a random access response; the random access response being used to instruct the terminal that the first network device has determined that a random access request for a request SIB has been received.

[0116] In some embodiments of the second aspect, the first request is a request sent by the terminal before the cell is reselected to the first cell; or, the first request is a request sent by the terminal after the cell is reselected to the first cell.

[0117] In some embodiments of the second aspect, the method further includes: determining the verification method of the MIB based on whether the first cell periodically transmits the SIB; determining whether the MIB contains a first bit based on whether the first cell periodically transmits the SIB; and determining the indication content of the second bit contained in the MIB based on whether the first cell periodically transmits the SIB.

[0118] In some embodiments of the second aspect, determining the MIB verification method based on whether the first cell periodically sends SIBs includes at least one of the following: determining the MIB verification algorithm based on whether the first cell periodically sends SIBs; determining the MIB verification mask based on whether the first cell periodically sends SIBs.

[0119] A third aspect provides a method for requesting System Information B (SIB), wherein the request is executed by a second network device of a second cell, and the method includes:

[0120] The receiving terminal sends a second request when it has a cell reselection requirement; the second request is used by the terminal to request the first cell to send a System Information Block (SIB).

[0121] In some embodiments of the third aspect, the method further includes sending a second request to a first network device of the first cell.

[0122] The fourth aspect provides a method for requesting System Information B (SIB), wherein the request is executed by a second network device of a second cell, and the method includes:

[0123] The cell configuration of the first cell is sent to the terminal; the cell configuration is used at least by the terminal to determine whether the first cell periodically sends SIBs.

[0124] In some embodiments of the fourth aspect, the cell configuration includes at least one of the following: first information indicating whether the first cell periodically sends SIBs; second information indicating whether the first cell sends SIBs based on an on-demand mechanism; third information used by the terminal to send a first request to the first cell, and / or, the third information used by the terminal to send a second request to the second cell; the first request and / or the second request used by the terminal to request SIBs from the first cell.

[0125] The fifth aspect provides a terminal, comprising: a processing module configured to determine the method of obtaining the SIB of the first cell based on whether the first cell periodically sends an SIB.

[0126] A sixth aspect provides a method performed by a first network device, comprising: a receiving module configured to receive a first request sent by a terminal; the first request being used by the terminal to request a System Information Block (SIB) of a first cell;

[0127] The sending module is configured to send the SIB requested by the terminal based on the first request.

[0128] A seventh aspect provides a second network device, comprising: a receiving module configured to receive a second request sent by a terminal when it has a cell reselection requirement; the second request is used by the terminal to request a first cell to send a System Information Block (SIB).

[0129] An eighth aspect provides a second network device, comprising: a transmitting module configured to transmit a cell configuration of a first cell to a terminal; the cell configuration being used by the terminal to determine whether the first cell periodically transmits an SIB.

[0130] Ninthly, embodiments of this disclosure provide a communication device, the communication device comprising: one or more processors;

[0131] The processor is used to invoke instructions to cause the communication device to execute the request method of the information system block (SIB) described in the optional implementations of the first to fourth aspects.

[0132] In a tenth aspect, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform a request method for an Information System Block (SIB) as described in optional implementations of the first to fourth aspects.

[0133] In one aspect, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to execute the request method for an Information System Block (SIB) as described in the optional implementations of the first to fifth aspects.

[0134] In a twelfth aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to execute the request method for an Information System Block (SIB) as described in optional implementations of the first to fourth aspects.

[0135] It is understood that the aforementioned terminals, network devices, communication systems, program products, and computer programs are all used to execute the methods provided in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0136] This disclosure provides a method for requesting an Information System Block (SIB), a communication device, a communication system, and a storage medium. This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0137] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0138] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0139] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the aforementioned," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0140] In the embodiments disclosed herein, "multiple" refers to two or more.

[0141] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0142] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "A in one case, B in another", etc., may include the following technical solutions depending on the situation: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, C, etc.

[0143] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0144] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. As another example, if the object being described is "information", then "first type of information" and "second type of information" can be the same information or different information, and their content can be the same or different.

[0145] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0146] In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “when…”, “when…”, “if…”, etc. can be used interchangeably.

[0147] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0148] In some embodiments, devices, etc., can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0149] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0150] In some embodiments, the terms "access network device (AN device)," "radio access network device (RAN device)," "base station (BS)," "radio base station," "fixed station," "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "antenna panel," "antenna array," "cell," "macro cell," "small cell," "femto cell," "pico cell," "sector," "cell group," "serving cell," "carrier," "component carrier," and "bandwidth part (BWP)" can be used interchangeably.

[0151] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", and "client" can be used interchangeably.

[0152] In some embodiments, access network devices, core network devices, or network devices can be replaced by terminals. For example, embodiments of this disclosure can also be applied to structures where communication between access network devices, core network devices, or network devices and terminals is replaced by communication between multiple terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel, and uplink link, downlink, etc., can be replaced with sidelink link.

[0153] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0154] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0155] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0156] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0157] Figure 1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0158] As shown in Figure 1A, the communication system 100 includes a terminal 101 and a network device 102. The network device 102 may include access network devices and / or core network devices.

[0159] In some embodiments, terminal 101 includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0160] In some embodiments, the terminal is also referred to as user equipment (UE).

[0161] In some embodiments, the access network device may be a node or device that connects a terminal to a wireless network. The access network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system.

[0162] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0163] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0164] In some embodiments, the core network equipment can be a single device, including a first network element, or it can be multiple devices or a group of devices, each including a first network element. Network elements can be virtual or physical. The core network includes, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0165] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions provided in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in this disclosure are also applicable to similar technical problems.

[0166] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1A, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1A are illustrative. The communication system may include all or some of the main bodies in FIG1A, or it may include other main bodies outside of FIG1A. The number and form of each main body are arbitrary. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0167] The embodiments disclosed herein can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems utilizing configuration methods of other resources, and next-generation systems extended from them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE and NR).

[0168] The content broadcast by a cell in the NR system may include: MIB, SIB1, and other system information (OSI). The RMSI may include at least SIB1.

[0169] In some embodiments, the Remaining Minimum System Information (RMSI) may include MIB and SIB1.

[0170] As shown in Figure 1B, the MIB may include configuration information for SIB1. For example, the MIB includes configuration information for scheduling resources. These scheduling resources may include Physical Downlink Control Channel (PDCCH) resources. Downlink Control Information (DCI) transmitted on this PUCCH resource is used to schedule SIB1. SIB1 can also be used to configure OSI scheduling resources. In some embodiments, SIB1 may also include information required for accessing the corresponding cell and Unified Access Control (UAC) parameters, etc.

[0171] For example, SIB2 may include cell reselection information. This cell reselection information is primarily related to the serving cell.

[0172] For example, SIB3 may include reselection information related to the current service frequency and co-frequency neighboring cells.

[0173] For example, SIB4 may include reselection information related to other NR frequencies and inter-frequency neighboring cells.

[0174] For example, SIB5 may include Evolved-Universal-Terrestrial Radio Access (E-UTRA) frequencies and E-UTRA neighbor cell reselection information.

[0175] For example, SIB6 may include a primary notification from the Emergency Telecommunications Warning System (ETWS).

[0176] For example, SIB7 may include ETWS secondary notifications.

[0177] For example, SIB8 may include Commercial Mobile Alert System (CMAS) alarm notifications.

[0178] For example, SIB9 may include information related to the positioning system time and world time.

[0179] 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.

[0180] In some embodiments, the control resource set (CORESET) of the RMSI is configured by the MIB. There are at least three resource location relationships between the RMSI's CORESET and the SSB. The control resource set includes one or more PDCCH resources. PDSCHs can be used to send SIBs.

[0181] The terminal can obtain the resource location of the PDCCH from the PBCH in the SSB, and further listen for DCI based on the resource location of the PDCCH. Based on the monitored DCI scheduling, it receives the RMSI.

[0182] Figure 1C shows the diagrams of the CORESET and SSB of the communication system under different multiplexing modes.

[0183] Figure 1 is used for Time Division Multiplexing (TDM) communication systems. Figure 2 is used for both TDM and Frequency Division Multiplexing (FDM) communication systems. Figure 3 is used for FDM communication systems.

[0184] In some embodiments, network energy saving (NES) is achieved by reducing the amount of system information sent by the network side.

[0185] In some embodiments, the network device requests other SIBs besides MIB and SIB1 on demand. That is, when the terminal needs other SIBs, the terminal sends a System Information (SI) request to the network device, and the network device determines whether to broadcast the corresponding SIB after receiving the SI request.

[0186] SI requests may include: SI requests based on message 1 (Msg1) of the random access request and / or SI requests based on message 3 of the random access request.

[0187] In some embodiments, Msg1-based SI requests may use reserved preamble and / or random access channel (RACH) resources.

[0188] In some embodiments, Msg3-based SI requests do not require reserved RACH resources and a random access preamble.

[0189] SI requests based on Msg3 can be defined as RRCSystemInfoRequest messages (Msg3).

[0190] The terminal determines whether to use an SI request based on Msg1 or Msg3 by reading system information.

[0191] If the base station provides configuration information for the SI request in the system information (SIB1) (e.g., si-Request-Config), then the SI request based on Msg1 is used; otherwise, the SI request based on Msg3 is used.

[0192] After receiving the SI request, the base station can send an SI request confirmation to the terminal.

[0193] After receiving confirmation of the SI request, the terminal receives the SI within the current modification period. The terminal receives the SI until the modification period ends or until it knows that the SI has been received. If RACH fails during the SI request process, the subsequent behavior of the UE depends on the UE implementation.

[0194] Figure 1D illustrates a method for information exchange between a network device and a terminal, which may include:

[0195] Network devices broadcast MIB;

[0196] Network devices broadcast SIB1;

[0197] The terminal sends an SI request;

[0198] Network devices send system information.

[0199] Under normal circumstances, in order for more terminals to access or camp on a cell in energy-saving mode, the cell needs to periodically send MIBs and SIB1s. Therefore, how to ensure that terminals can successfully access or camp on a cell in energy-saving mode without the network equipment periodically sending SIB1s and other SIBs is a problem that needs further investigation.

[0200] In view of this, as shown in FIG2A, this disclosure provides a method for requesting an SIB, executed by a communication system. The method may include:

[0201] S2101: The network device sends network information to the terminal.

[0202] In some embodiments, the network device may be an access network device.

[0203] In some embodiments, the network device sending network information may be a first network device and / or a second network device. The second network device is different from the first network device. For example, the first network device and the second network device may be two access network devices arranged adjacent to each other.

[0204] The first network device is the network device for the first cell. The second network device can be the network device for the second cell.

[0205] The first cell and the second cell can be adjacent cells. For example, the first cell and the second cell can be co-frequency adjacent cells, or the first cell and the second cell can be inter-frequency adjacent cells.

[0206] The first and second cells can be cells with overlapping coverage.

[0207] For carrier aggregation and / or dual connectivity scenarios, the second cell can be the primary cell of the first cell, and the first cell can be the secondary cell. Alternatively, the first cell can be a conventional secondary cell, and the second cell can be either a primary or secondary cell.

[0208] In some embodiments, the second cell may be the terminal's current cell. For example, if the terminal is in RRC connected state, the second cell may be the terminal's current serving cell. Also for example, if the terminal is in RRC idle state and / or RRC inactive state, the second cell may be the terminal's current camped cell.

[0209] In some embodiments, network devices broadcast, unicast, or multicast network information.

[0210] In some embodiments, the network information may be the MIB of the first cell.

[0211] In some embodiments, the network information may be the cell configuration of the first cell.

[0212] In some embodiments, the network information can be used by the terminal to determine whether the first cell periodically transmits SIBs.

[0213] In some embodiments, the network information can be used by the terminal to determine whether the first cell periodically transmits SIB1.

[0214] In some embodiments, periodically sending SIBs may include: sending SIBs according to a semi-statically configured period, and / or sending SIBs according to a period corresponding to a periodic configuration or a dynamic configuration.

[0215] In some embodiments, assuming that the first cell transmits SIBs non-periodically, the first cell may not transmit SIBs, transmit SIBs based on an on-demand mechanism, or transmit SIBs based on a terminal's request.

[0216] Sending SIBs based on an on-demand mechanism may include, but is not limited to, at least one of the following:

[0217] Cells send SIBs according to their own needs. For example, when a cell wants to establish downlink synchronization with a terminal or rebuild a downlink connection, it can be considered to have a need and therefore can actively broadcast an SIB.

[0218] The cell sends SIBs according to the needs of the terminals. For example, when a terminal needs to obtain an SIB, it can send a request to the network device. In this way, the network device will know that the terminal needs to obtain an SIB and then determine whether to broadcast the SIB.

[0219] In some embodiments, a terminal may request an SIB from a cell that periodically transmits SIBs by sending a Wake Up Signal (WUS).

[0220] In some embodiments, the first network device of the first cell periodically broadcasts the MIB.

[0221] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends an SIB.

[0222] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends SIB1.

[0223] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends an SIB, including but not limited to at least one of the following:

[0224] The verification method of MIB is determined based on whether the first cell periodically sends SIB;

[0225] Determine whether the MIB contains the first bit based on whether the first cell periodically sends the SIB;

[0226] The content of the second bit in the MIB is determined based on whether the first cell periodically sends the SIB.

[0227] In some embodiments, the MIB of the first cell explicitly indicates whether the first cell periodically transmits SIBs. For example, the MIB of the first cell has an indication bit indicating whether the first cell periodically transmits SIBs. For instance, the MIB of the first cell explicitly indicates whether the first cell periodically transmits SIB1.

[0228] In some embodiments, the MIB of the first cell implicitly indicates whether the first cell periodically transmits SIBs. For example, when the first cell does not periodically transmit SIBs, the MIB may include PUCCH resources containing scheduling information (e.g., DCI) for SIB1. Alternatively, when the first cell periodically transmits SIBs, the MIB may not include PUCCH resources containing scheduling information (e.g., DCI) for SIB1. Again, for example, the MIB of the first cell implicitly indicates whether the first cell periodically transmits SIB1.

[0229] In some embodiments, the method of MIB verification determines whether the first cell periodically transmits SIB.

[0230] For example, if the first cell periodically transmits SIBs, then the first cell's MIB uses a first verification method. If the first cell does not periodically transmit SIBs, then the first cell's MIB uses a second verification method. In this case, if the terminal successfully verifies the first cell's MIB using the first verification method, it is determined that the first cell periodically transmits SIBs; otherwise, it is determined that the first cell does not periodically transmit SIBs. Alternatively, if the terminal successfully verifies the first cell's MIB using the second verification method, it is determined that the first cell does not periodically transmit SIBs; otherwise, it is determined that the first cell periodically transmits SIBs.

[0231] In some embodiments, it is determined whether the first cell periodically transmits an SIB based on the verification algorithm used by the MIB. For example, different verification algorithms may correspond to different polynomials that generate the CRC.

[0232] In some embodiments, it is determined whether the first cell periodically transmits an SIB based on the verification mask used by the MIB.

[0233] For example, taking CRC as an example, the check mask can be (CRC mask). For example, the information bits of the MIB and the bit sequence generated based on the polynomial are XORed to obtain a CRC of a specified length, and the specified length CRC and the check mask are XORed and appended to the back end of the MIB, which is then uniformly sent to the terminal by the network device.

[0234] In some embodiments, it is determined whether the first cell periodically transmits the SIB based on whether the MIB contains the first bit.

[0235] For example, an unused idle bit and / or reserved bit in the MIB can be used as the first bit. There can be one or more first bits. Different values ​​of the first bit represent whether the first cell periodically transmits the SIB.

[0236] Based on the indication content of the second bit contained in the MIB, it is determined whether the first cell periodically transmits the SIB.

[0237] In some embodiments, a new bit can be added to the MIB or an idle bit in the MIB can be used as a second bit. There can be one or more second bits. The indication content of the second bit corresponds to its value. Based on the indication content of the second bit, it is determined whether the first cell periodically transmits the SIB.

[0238] In some embodiments, depending on whether the first cell periodically sends an SSB, the first cell determines the value of the idle spare bit in the first cell's MIB.

[0239] Based on whether the first cell periodically transmits SSB, the first cell determines the value of the synchronization signal broadcast block - subcarrier spacing offset ssb-SubcarrierOffest indicator bit in the MIB of the first cell;

[0240] Based on whether the first cell periodically sends SSB, the first cell determines the value of the system frame number SFN indicator bit in the MIB of the first cell.

[0241] Based on whether the first cell periodically transmits SSB, the first cell determines the value of the demodulation reference signal DRMS-type A position indicator bit in the MIB of the first cell.

[0242] Based on whether the first cell periodically sends an SSB, the first cell determines the value of the cell prohibition indicator bit in the MIB of the first cell, and thus determines the type of the first cell.

[0243] Based on whether the first cell periodically transmits SSB, the first cell determines the value of the subcarrierSpacingCommon indicator bit in the MIB of the first cell.

[0244] Based on whether the first cell periodically transmits SSB, determine the value of the intraFreqReselections indicator bit in the MIB of the first cell.

[0245] Based on whether the first cell periodically sends SSB, determine the value of the downlink control channel SIB1 configuration (pdcch-ConfigSIB1) indicator bit in the MIB of the first cell;

[0246] The value of the CellBarred indicator bit in the MIB of the first cell is determined based on whether the first cell periodically sends an SSB.

[0247] In some embodiments, at least one indicator bit in the MIB of the first cell has a value within a first set, indicating that the first cell is a first type of cell. In some embodiments, at least one indicator bit in the MIB of the first cell has a value within a second set, indicating that the first cell is a second type of cell.

[0248] In some embodiments, the value of the ssb-SubcarrierOffest indicator bit in the MIB includes the last bit of the ssb-SubcarrierOffest indicator bit in the MIB.

[0249] In some embodiments, the value of the ssb-SubcarrierOffest indicator bit in the MIB of the first cell is located within a first set, indicating that the first cell is a first type of cell. In some embodiments, the value of the ssb-SubcarrierOffest indicator bit in the MIB of the first cell is located within a second set, indicating that the first cell is a second type of cell.

[0250] In some embodiments, the value of the pdcch-ConfigSIB1 indicator bit in the MIB of the first cell is located within a first set, indicating that the first cell is a first type of cell. In some embodiments, the value of the pdcch-ConfigSIB1 indicator bit in the MIB of the first cell is located within a second set, indicating that the first cell is a second type of cell.

[0251] In some embodiments, the values ​​in the first set and the second set can be configured by the network device or predefined by means of protocol agreement, etc.

[0252] For example, the first set contains even values, and the second set contains odd values. Alternatively, the first set may contain values ​​with a range different from the second set. For instance, the values ​​in the first set may all be less than the values ​​in the second set, or the values ​​in the first set may all be greater than the values ​​in the second set.

[0253] In some embodiments, a second network device of the second cell transmits the cell configuration of the first cell. Exemplarily, this cell configuration can be used by the terminal to determine whether the first cell periodically transmits SIBs. For example, the cell configuration can be used by the terminal at least to determine whether to periodically transmit SIB1.

[0254] In some embodiments, the cell configuration includes at least one of the following:

[0255] The first information indicates whether the first cell should periodically send SIBs;

[0256] The second piece of information indicates whether the first cell should send SIBs based on an on-demand mechanism;

[0257] The third information is used by the terminal to send a first request to the first cell, and / or the third information is used by the terminal to send a second request to the second cell; the first request and / or the second request are used by the terminal to request an SIB from the first cell.

[0258] In some embodiments, when the cell configuration includes the first information, the second information may be omitted from the cell configuration.

[0259] In some embodiments, when the cell configuration includes second information, the first information may be omitted from the cell configuration.

[0260] In some embodiments, when the cell configuration includes third information, the first and second information may be omitted from the cell configuration. For example, this cell configuration is equivalent to configuring a terminal to request the SIB of the first cell through a first request.

[0261] In some embodiments, the third information may include at least one of the following:

[0262] The method of sending the first request may include, for example, one-time sending and / or repeated sending;

[0263] Receive time-domain location information of the time window.

[0264] In some embodiments, if the third information does not contain time-domain location information of the receiving time window, the sending method of the first request can be assumed to be a one-time sending, and the indication information of the sending method can be omitted.

[0265] S2102: The terminal determines whether the first cell periodically sends SIBs.

[0266] In some embodiments, the terminal determines whether the first cell periodically sends an SIB based on the MIB and / or cell configuration of the first cell.

[0267] In some embodiments, the terminal determines whether the first cell periodically sends an SIB during the current time period based on the MIB and / or cell configuration of the first cell.

[0268] S2103: The terminal determines the method for obtaining the SIB of the first cell.

[0269] In some embodiments, the terminal determines the method for obtaining the SIB of the first cell based on whether the first cell periodically sends the SIB.

[0270] In some embodiments, SIBs are periodically transmitted in the first cell, and SIBs are received from the first cell at corresponding times according to the transmission period of the first cell.

[0271] In some embodiments, the SIB is transmitted non-periodically in the first cell, and the method for obtaining the SIB of the first cell is determined according to the cell type of the first cell.

[0272] In some embodiments, if the first cell transmits SIBs aperiodically, and if the first cell is a first-type cell that transmits SIBs on demand, it is determined to request an SIB from the first cell based on the request information.

[0273] In some embodiments, if the first cell transmits SIBs aperiodically, and if the first cell is a second type of cell that does not transmit SIBs, the SIB of the first cell is determined to be obtained from the reference cell (or anchor cell) of the first cell.

[0274] In some embodiments, when the terminal has a cell reselection requirement, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0275] When the terminal recovers from the overlay vulnerability, the method for obtaining the SIB of the first cell is determined based on whether the first cell periodically sends the SIB.

[0276] In some embodiments, the coverage vulnerability here may be an area without network coverage.

[0277] When the terminal receives a system broadcast change instruction from the first cell, it determines the method of obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs.

[0278] In some embodiments, if a terminal receives a system broadcast change indication from a first cell, it indicates that the first cell has updated its SIBs. For example, if the first cell has a system broadcast change indication, the indication may indicate whether SIB1 and / or SIBn have been updated, where n can be a positive integer greater than or equal to 2. If SIB1 has been updated, the terminal needs to obtain the SIB1 of the first cell. If SIBn has been updated, the terminal needs to obtain the SIB1 of the first cell and retrieve the resource configuration of SIBn based on SIB1.

[0279] When the terminal has a positioning requirement, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0280] For example, when a terminal has a satellite positioning requirement, it needs to obtain the SIBs related to positioning. For instance, if a terminal has a positioning requirement, it needs to obtain the timing SIB9 of the satellite positioning system. And to obtain SIB9, the terminal needs to obtain the configuration information of SIB9 based on SIB1.

[0281] When the terminal receives the paging downlink control information (DCI) indicating system information updates from the first cell, it determines the method for obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs.

[0282] In some embodiments, if the terminal paging downlink control information (DCI) indicates that the system information has been updated, it means that the SIB has been updated. Similarly, if the terminal needs to camp or access the first cell, it needs to obtain the updated SIB. Therefore, it is necessary to determine the method of obtaining the SIB of the first cell.

[0283] When the validity period of the SIB of the first cell stored in the terminal expires, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0284] In some embodiments, the SIB of the first cell has a certain validity period. If the validity period expires, the terminal may not be able to determine whether the SIB is still valid and needs to reacquire the SIB of the first cell. Therefore, it is necessary to determine the method of acquiring the SIB of the first cell.

[0285] S2104: The terminal sends the first request to the first cell.

[0286] In some embodiments, if the terminal determines that the method for obtaining the SIB of the first cell is to obtain the SIB of the first cell by sending a first request to the first cell, then the terminal sends a first request to the first cell.

[0287] For example, if the first cell is a cell that sends an SIB based on a terminal request, then the terminal sends a first request to the first cell.

[0288] For example, if the first cell is a cell that transmits SIBs on demand, then the terminal sends a first request to the first cell.

[0289] For example, if the first cell sends SIBs based on terminal requests or sends SIBs on demand and the cell is configured to obtain the SIBs of the first cell based on the first request, then the terminal sends the first request to the first cell.

[0290] In some embodiments, the terminal sends a first request to the first cell before accessing or camping on the first cell.

[0291] In some embodiments, the terminal sends a first request to the first cell during a random access process to or camp on the first cell.

[0292] For example, if a terminal has a need for cell reselection and the first cell sends an SIB non-periodically, the terminal determines to send a first request to the first cell to request the first cell SIB.

[0293] For example, if a terminal has a need for cell reselection and the first cell sends SIBs non-periodically, it determines to send a first request for the first cell SIB to the first cell before reselecting to the first cell.

[0294] Before reselecting to the first cell, a first request is sent to the first cell, which can be used to request the SIB.

[0295] For example, during the cell reselection process, the terminal sends a first request to the first cell.

[0296] In some embodiments, the first request may include: identification information of the requested SIB. For example, the SIB requested by the terminal may be SIB1. In some embodiments, the identification information of the SIB may be omitted from the first request. For example, the SIB requested by the terminal before reselecting to the first cell may default to a specified SIB. The specified SIB may include, but is not limited to, SIB1.

[0297] In some embodiments, the first request may further include: the cell identifier of the first cell.

[0298] In some embodiments, the cell identifier may include, but is not limited to, physical cell identifier and / or high-rise cell identifier.

[0299] It is worth noting that if the terminal sends the first request to the first cell, the cell identifier of the first cell is optional. For example, if the terminal sends the first request from the resource location where the first request was sent in the first cell, the first request may not carry the cell identifier of the first cell.

[0300] In some embodiments, the terminal may request an SIB from the first cell based on Msg1 of the four-step random access request.

[0301] In some embodiments, the terminal may request an SIB from the first cell based on Msg3 of the four-step random access request.

[0302] In some embodiments, the terminal may request an SIB from the first cell based on the MsgA of a two-step random access request.

[0303] In some embodiments, the terminal has a cell reselection requirement and the first cell non-periodicly transmits SIBs. The terminal determines that after reselecting to the first cell, it will send a first request to the first cell to request the first cell SIB.

[0304] For example, if a terminal has a need for cell reselection and the first cell sends an SIB non-periodically, it determines to send a second request to the second cell requesting the SIB of the first cell.

[0305] In some embodiments, the network device may reserve a specific random access preamble. When the terminal sends a random access message carrying the specific random access preamble, it can be considered that the terminal is requesting an SIB from the network device.

[0306] In some embodiments, there are multiple specific random access preambles. For example, different specific random access preambles correspond to different SIBs. Thus, the terminal selects the corresponding specific random access preamble to send a random access message based on the correspondence and the SIB it needs to request.

[0307] S2105: The first cell sends a request response.

[0308] In some embodiments, the request response may include a random access response sent by the first cell.

[0309] In some embodiments, if the first cell determines that the terminal is allowed to camp and / or determines the SIB to send the terminal request, it sends a random access response to the terminal.

[0310] As shown in Figure 6D, the random access response may include one or more subheaders.

[0311] In some embodiments, a subheading may include a Random Access Preamble Identity (RAP ID).

[0312] In some embodiments, if a terminal receives a subheader containing its own RAP ID, it can be considered that it has received a random access response.

[0313] In other embodiments, if the terminal receives a subheader containing only the RAP ID, it can be considered that a random access response has been received.

[0314] In some embodiments, these subheaders may also carry subheaders such as a Backoff Indicator (BI).

[0315] In some embodiments, the random access response may further include a MAC Random Access Response (RAR).

[0316] In some embodiments, the request response may include: a terminal-requested SIB sent by the first cell.

[0317] In some embodiments, the request response may be an RRC message indicating the SIB requested by the sending terminal.

[0318] In some embodiments, the request response may be an RRC message indicating the SIB to be broadcast.

[0319] In some embodiments, the request response may indicate whether the SIB requested by the terminal will be sent. If the request response indicates that the first cell and / or the second cell will send the SIB requested by the terminal, the terminal listens for the SIB sent by the first cell and / or the second cell.

[0320] In some embodiments, the request response may also carry resource location information of the SIB requested by the terminal sent by the first cell and / or the second cell, which facilitates the terminal to listen to the SIB at the resource location indicated by the resource location information, for example, listening to SIB1.

[0321] S2106: The terminal determines whether the network device has detected the first request.

[0322] In some embodiments, the terminal listens for the response to the first request within a receiving time window after sending the first request. If a response is received within the time window, it is determined that the network device has received the first request; otherwise, it is assumed that the terminal has not received the response.

[0323] In some embodiments, the terminal determines whether the network side has received the first request based on whether it has received the SIB requested by the terminal from the network side. For example, if the terminal detects that the first network device sends its own requested SIB, it determines that the network side has received the first request; otherwise, it can be assumed that the network side has not received the first request.

[0324] In some embodiments, the terminal determines whether the network side has received the first request based on whether it has received a random access response. For example, if the terminal detects a random access response containing its own RAP ID when receiving the random access response, it determines that the network side has received the first request; otherwise, it can be assumed that the network side has not received the first request.

[0325] In some embodiments, the terminal determines whether the network side has received the first request based on whether it receives a request response to the first request. For example, if the terminal receives a request response sent by the first network device, it determines that the network side has received the first request; otherwise, it can be assumed that the network side has not received the first request.

[0326] S2107: The terminal resends the first request to the first cell.

[0327] In some embodiments, if it is determined that the network device has not detected the first request, the first request is resent.

[0328] In some embodiments, if it is determined that the network device has not detected the first request, the transmission power is increased and the first request is retransmitted until the number of transmissions of the first request reaches the maximum number or the transmission power of the first request reaches the maximum transmission power.

[0329] In some embodiments, the terminal increases the power of the random access request and retransmits the random access request corresponding to the first request.

[0330] In some embodiments, the terminal increases the power of the random access request and retransmits the random access request corresponding to the first request until the transmission power of the random access request reaches the maximum transmission power or the number of transmissions of the first random access preamble reaches the maximum number of transmissions.

[0331] In some embodiments, if it is determined that the network device has detected the first request, the transmission of the first request to the first cell is suspended regardless of whether the network side sends the SIB of the terminal request.

[0332] In some embodiments, if a terminal has urgent service transmission needs, it can choose to access or camp on other cells that periodically send SSBs and / or SIBs.

[0333] As shown in Figure 2B, this embodiment of the disclosure provides a method for requesting an SIB, executed by a communication system. The method may include:

[0334] S2201: The network device sends network information to the terminal.

[0335] In some embodiments, the network device may be an access network device.

[0336] In some embodiments, the network device sending network information may be a first network device and / or a second network device. The second network device is different from the first network device. For example, the first network device and the second network device may be two access network devices arranged adjacent to each other.

[0337] The first network device is the network device for the first cell. The second network device can be the network device for the second cell.

[0338] The first cell and the second cell can be adjacent cells. For example, the first cell and the second cell can be co-frequency adjacent cells, or the first cell and the second cell can be inter-frequency adjacent cells.

[0339] The first and second cells can be cells with overlapping coverage.

[0340] For carrier aggregation and / or dual connectivity scenarios, the second cell can be the primary cell of the first cell, and the first cell can be the secondary cell. Alternatively, the first cell can be a conventional secondary cell, and the second cell can be either a primary or secondary cell.

[0341] In some embodiments, the second cell may be the terminal's current cell. For example, if the terminal is in RRC connected state, the second cell may be the terminal's current serving cell. Also for example, if the terminal is in RRC idle state and / or RRC inactive state, the second cell may be the terminal's current camped cell.

[0342] In some embodiments, network devices broadcast, unicast, or multicast network information.

[0343] In some embodiments, the network information may be the MIB of the first cell.

[0344] In some embodiments, the network information may be the cell configuration of the first cell.

[0345] In some embodiments, the network information can be used by the terminal to determine whether the first cell periodically transmits SIBs.

[0346] In some embodiments, the network information can be used by the terminal to determine whether the first cell periodically transmits SIB1.

[0347] In some embodiments, periodically sending SIBs may include: sending SIBs according to a semi-statically configured period, and / or sending SIBs according to a period corresponding to a periodic configuration or a dynamic configuration.

[0348] In some embodiments, assuming that the first cell transmits SIBs non-periodically, the first cell may not transmit SIBs, transmit SIBs based on an on-demand mechanism, or transmit SIBs based on a terminal's request.

[0349] Sending SIBs based on an on-demand mechanism may include, but is not limited to, at least one of the following:

[0350] Cells send SIBs according to their own needs. For example, when a cell wants to establish downlink synchronization with a terminal or rebuild a downlink connection, it can be considered to have a need and therefore can actively broadcast an SIB.

[0351] The cell sends SIBs according to the needs of the terminals. For example, when a terminal needs to obtain an SIB, it can send a request to the network device. In this way, the network device will know that the terminal needs to obtain an SIB and then determine whether to broadcast the SIB.

[0352] In some embodiments, a terminal may request an SIB from a cell that periodically transmits SIBs by sending a Wake Up Signal (WUS).

[0353] In some embodiments, the first network device of the first cell periodically broadcasts the MIB.

[0354] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends an SIB.

[0355] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends SIB1.

[0356] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends an SIB, including but not limited to at least one of the following:

[0357] The verification method of MIB is determined based on whether the first cell periodically sends SIB;

[0358] Determine whether the MIB contains the first bit based on whether the first cell periodically sends the SIB;

[0359] The content of the second bit in the MIB is determined based on whether the first cell periodically sends the SIB.

[0360] In some embodiments, the MIB of the first cell explicitly indicates whether the first cell periodically transmits SIBs. For example, the MIB of the first cell has an indication bit indicating whether the first cell periodically transmits SIBs. For instance, the MIB of the first cell explicitly indicates whether the first cell periodically transmits SIB1.

[0361] In some embodiments, the MIB of the first cell implicitly indicates whether the first cell periodically transmits SIBs. For example, when the first cell does not periodically transmit SIBs, the MIB may include PUCCH resources containing scheduling information (e.g., DCI) for SIB1. Alternatively, when the first cell periodically transmits SIBs, the MIB may not include PUCCH resources containing scheduling information (e.g., DCI) for SIB1. Again, for example, the MIB of the first cell implicitly indicates whether the first cell periodically transmits SIB1.

[0362] In some embodiments, the method of MIB verification determines whether the first cell periodically transmits SIB.

[0363] For example, if the first cell periodically transmits SIBs, then the first cell's MIB uses a first verification method. If the first cell does not periodically transmit SIBs, then the first cell's MIB uses a second verification method. In this case, if the terminal successfully verifies the first cell's MIB using the first verification method, it is determined that the first cell periodically transmits SIBs; otherwise, it is determined that the first cell does not periodically transmit SIBs. Alternatively, if the terminal successfully verifies the first cell's MIB using the second verification method, it is determined that the first cell does not periodically transmit SIBs; otherwise, it is determined that the first cell periodically transmits SIBs.

[0364] In some embodiments, it is determined whether the first cell periodically transmits an SIB based on the verification algorithm used by the MIB. For example, different verification algorithms may correspond to different polynomials that generate the CRC.

[0365] In some embodiments, it is determined whether the first cell periodically transmits an SIB based on the verification mask used by the MIB.

[0366] For example, taking CRC as an example, the check mask can be (CRC mask). For example, the information bits of the MIB and the bit sequence generated based on the polynomial are XORed to obtain a CRC of a specified length, and the specified length CRC and the check mask are XORed and appended to the back end of the MIB, which is then uniformly sent to the terminal by the network device.

[0367] In some embodiments, it is determined whether the first cell periodically transmits the SIB based on whether the MIB contains the first bit.

[0368] For example, an unused idle bit and / or reserved bit in the MIB can be used as the first bit. There can be one or more first bits. Different values ​​of the first bit represent whether the first cell periodically transmits the SIB.

[0369] Based on the indication content of the second bit contained in the MIB, it is determined whether the first cell periodically transmits the SIB.

[0370] In some embodiments, a new bit can be added to the MIB or an idle bit in the MIB can be used as a second bit. There can be one or more second bits. The indication content of the second bit corresponds to its value. Based on the indication content of the second bit, it is determined whether the first cell periodically transmits the SIB.

[0371] In some embodiments, a second network device of the second cell transmits the cell configuration of the first cell. Exemplarily, this cell configuration can be used by the terminal to determine whether the first cell periodically transmits SIBs. For example, the cell configuration can be used by the terminal at least to determine whether to periodically transmit SIB1.

[0372] In some embodiments, the cell configuration includes at least one of the following:

[0373] The first information indicates whether the first cell should periodically send SIBs;

[0374] The second piece of information indicates whether the first cell should send SIBs based on an on-demand mechanism;

[0375] The third information is used by the terminal to send a first request to the first cell, and / or the third information is used by the terminal to send a second request to the second cell; the first request and / or the second request are used by the terminal to request an SIB from the first cell.

[0376] In some embodiments, when the cell configuration includes the first information, the second information may be omitted from the cell configuration.

[0377] In some embodiments, when the cell configuration includes second information, the first information may be omitted from the cell configuration.

[0378] In some embodiments, when the cell configuration includes third information, the first and second information may be omitted from the cell configuration. For example, this cell configuration is equivalent to configuring a terminal to request the SIB of the first cell through a first request and / or a second request.

[0379] In some embodiments, the third information may include at least one of the following:

[0380] The method of sending the second request may include, for example, sending it once and / or sending it repeatedly;

[0381] Receive time-domain location information of the time window.

[0382] In some embodiments, if the third information does not contain time-domain location information of the receiving time window, the second request can be sent in a one-time manner by default, and the indication information of the sending method can be omitted.

[0383] When the terminal recovers from the overlay vulnerability, the method for obtaining the SIB of the first cell is determined based on whether the first cell periodically sends the SIB.

[0384] In some embodiments, the coverage vulnerability here may be an area without network coverage.

[0385] When the terminal receives a system broadcast change instruction from the first cell, it determines the method of obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs.

[0386] In some embodiments, if a terminal receives a system broadcast change indication from a first cell, it indicates that the first cell has updated its SIBs. For example, if the first cell has a system broadcast change indication, the indication may indicate whether SIB1 and / or SIBn have been updated, where n can be a positive integer greater than or equal to 2. If SIB1 has been updated, the terminal needs to obtain the SIB1 of the first cell. If SIBn has been updated, the terminal needs to obtain the SIB1 of the first cell and retrieve the resource configuration of SIBn based on SIB1.

[0387] When the terminal has a positioning requirement, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0388] For example, when a terminal has a satellite positioning requirement, it needs to obtain the SIBs related to positioning. For instance, if a terminal has a positioning requirement, it needs to obtain the timing SIB9 of the satellite positioning system. And to obtain SIB9, the terminal needs to obtain the configuration information of SIB9 based on SIB1.

[0389] When the terminal receives the paging downlink control information (DCI) indicating system information updates from the first cell, it determines the method for obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs.

[0390] In some embodiments, if the terminal paging downlink control information (DCI) indicates that the system information has been updated, it means that the SIB has been updated. Similarly, if the terminal needs to camp or access the first cell, it needs to obtain the updated SIB. Therefore, it is necessary to determine the method of obtaining the SIB of the first cell.

[0391] When the validity period of the SIB of the first cell stored in the terminal expires, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0392] In some embodiments, the SIB of the first cell has a certain validity period. If the validity period expires, the terminal may not be able to determine whether the SIB is still valid and needs to reacquire the SIB of the first cell. Therefore, it is necessary to determine the method of acquiring the SIB of the first cell.

[0393] S2202: The terminal determines whether the first cell periodically sends SIBs.

[0394] In some embodiments, the terminal determines whether the first cell periodically sends an SIB based on the MIB and / or cell configuration of the first cell.

[0395] In some embodiments, the terminal determines whether the first cell periodically sends an SIB during the current time period based on the MIB and / or cell configuration of the first cell.

[0396] S2203: The terminal determines the method for obtaining the SIB of the first cell.

[0397] In some embodiments, the terminal determines the method for obtaining the SIB of the first cell based on whether the first cell periodically sends the SIB.

[0398] In some embodiments, SIBs are periodically transmitted in the first cell, and SIBs are received from the first cell at corresponding times according to the transmission period of the first cell.

[0399] In some embodiments, the SIB is transmitted non-periodically in the first cell, and the method for obtaining the SIB of the first cell is determined according to the cell type of the first cell.

[0400] In some embodiments, if the first cell transmits SIBs aperiodically, and if the first cell is a first-type cell that transmits SIBs on demand, it is determined to request an SIB from the first cell based on the request information.

[0401] In some embodiments, if the first cell transmits SIBs aperiodically, and if the first cell is a second type of cell that does not transmit SIBs, the SIB of the first cell is determined to be obtained from the reference cell (or anchor cell) of the first cell.

[0402] In some embodiments, when the terminal has a cell reselection requirement, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0403] S2204: The terminal sends a second request to the second cell.

[0404] In some embodiments, the second cell may be the terminal's current cell. For example, the second cell may be the cell where the terminal is currently camped.

[0405] In some embodiments, the second cell may be a regular cell at the terminal's current location. This regular cell may be a cell that periodically transmits SSB and / or SIB.

[0406] In some embodiments, if the terminal obtains the SIB of the first cell by sending a second request to the second cell, based on the determined method of obtaining the SIB of the first cell, then the terminal sends a second request to the first cell.

[0407] For example, if the first cell is a cell that sends an SIB based on a terminal request, then the terminal sends a second request to the second cell.

[0408] For example, if the first cell is a cell that transmits SIBs on demand, then the terminal sends a second request to the second cell.

[0409] For example, if the first cell sends SIBs based on terminal requests or sends SIBs on demand and the cell is configured to obtain the SIBs of the first cell based on a second request, then the terminal sends a second request to the second cell.

[0410] In some embodiments, the terminal sends a second request to the second cell before accessing or camping on the first cell.

[0411] In some embodiments, the terminal sends an RRC message, MAC message, or Uplink Control Information (UCI) carrying a second request to the second cell.

[0412] S2205: The first cell and / or the second cell send a request response.

[0413] In some embodiments, the request response may include: a terminal-requested SIB sent by the first cell.

[0414] In some embodiments, the request response may be an RRC message indicating the SIB requested by the sending terminal.

[0415] In some embodiments, the request response may be an RRC message indicating the SIB to be broadcast.

[0416] In some embodiments, the request response may indicate whether the SIB requested by the terminal will be sent. If the request response indicates that the first cell and / or the second cell will send the SIB requested by the terminal, the terminal listens for the SIB sent by the first cell and / or the second cell.

[0417] In some embodiments, the request response may also carry resource location information of the SIB requested by the terminal sent by the first cell and / or the second cell, which facilitates the terminal to listen to the SIB at the resource location indicated by the resource location information, for example, listening to SIB1.

[0418] In some embodiments, the second request includes at least one of the following:

[0419] The signage for the first residential area;

[0420] The identification information of the requested SIB.

[0421] In some embodiments, the second request may include: identification information of the requested SIB. For example, the SIB requested by the terminal may be SIB1.

[0422] In some embodiments, the identification information of the SIB may be omitted in the second request. For example, the SIB requested by the terminal before reselecting to the first cell may default to a specified SIB. The specified SIB may include, but is not limited to, SIB1.

[0423] In some embodiments, the cell identifier may include, but is not limited to, physical cell identifier and / or high-rise cell identifier.

[0424] S2206: The terminal determines whether the network device has detected the second request.

[0425] In some embodiments, the terminal listens for the response to the second request within a receiving time window after sending the second request. If a response is detected within the time window, it is determined that the network side has detected the second request; otherwise, it can be assumed that the terminal has not detected the response.

[0426] In some embodiments, the terminal determines whether the network side has received the second request based on whether it has received the SIB requested by the terminal from the network side. For example, if the terminal detects that the network side has sent the SIB it requested, it determines that the network side has received the second request; otherwise, it can be assumed that the network side has not received the second request.

[0427] In some embodiments, the terminal determines whether the network side has received the second request based on whether it receives a request response to the second request. For example, if the terminal receives a request response sent by the first network device, it determines that the network side has received the second request; otherwise, it can be assumed that the network side has not received the second request.

[0428] S2207: Resend the second request to the second cell.

[0429] In some embodiments, the second request is resent to the second cell until the maximum number of times the second request has been sent is reached.

[0430] In some embodiments, if it is determined that the network device has detected the second request, the transmission of the second request to the second cell is suspended regardless of whether the network side sends the SIB of the terminal request.

[0431] In some embodiments, if a terminal has urgent service transmission needs, it can choose to access or camp on other cells that periodically send SSBs and / or SIBs.

[0432] As shown in Figure 2C, this embodiment of the disclosure provides a method for requesting an SIB, executed by a communication system. The method may include:

[0433] S2301: The network device sends network information to the terminal.

[0434] In some embodiments, the network device may be an access network device.

[0435] In some embodiments, the network device sending network information may be a first network device and / or a second network device. The second network device is different from the first network device. For example, the first network device and the second network device may be two access network devices arranged adjacent to each other.

[0436] The first network device is the network device for the first cell. The second network device can be the network device for the second cell.

[0437] The first cell and the second cell can be adjacent cells. For example, the first cell and the second cell can be co-frequency adjacent cells, or the first cell and the second cell can be inter-frequency adjacent cells.

[0438] The first and second cells can be cells with overlapping coverage.

[0439] For carrier aggregation and / or dual connectivity scenarios, the second cell can be the primary cell of the first cell, and the first cell can be the secondary cell. Alternatively, the first cell can be a conventional secondary cell, and the second cell can be either a primary or secondary cell.

[0440] In some embodiments, the second cell may be the terminal's current cell. For example, if the terminal is in RRC connected state, the second cell may be the terminal's current serving cell. Also for example, if the terminal is in RRC idle state and / or RRC inactive state, the second cell may be the terminal's current camped cell.

[0441] In some embodiments, network devices broadcast, unicast, or multicast network information.

[0442] In some embodiments, the network information may be the MIB of the first cell.

[0443] In some embodiments, the network information may be the cell configuration of the first cell.

[0444] In some embodiments, the network information can be used by the terminal to determine whether the first cell periodically transmits SIBs.

[0445] In some embodiments, the network information can be used by the terminal to determine whether the first cell periodically transmits SIB1.

[0446] In some embodiments, periodically sending SIBs may include: sending SIBs according to a semi-statically configured period, and / or sending SIBs according to a period corresponding to a periodic configuration or a dynamic configuration.

[0447] In some embodiments, assuming that the first cell transmits SIBs non-periodically, the first cell may not transmit SIBs, transmit SIBs based on an on-demand mechanism, or transmit SIBs based on a terminal's request.

[0448] Sending SIBs based on an on-demand mechanism may include, but is not limited to, at least one of the following:

[0449] Cells send SIBs according to their own needs. For example, when a cell wants to establish downlink synchronization with a terminal or rebuild a downlink connection, it can be considered to have a need and therefore can actively broadcast an SIB.

[0450] The cell sends SIBs according to the needs of the terminals. For example, when a terminal needs to obtain an SIB, it can send a request to the network device. In this way, the network device will know that the terminal needs to obtain an SIB and then determine whether to broadcast the SIB.

[0451] In some embodiments, a terminal may request an SIB from a cell that periodically transmits SIBs by sending a Wake Up Signal (WUS).

[0452] In some embodiments, the first network device of the first cell periodically broadcasts the MIB.

[0453] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends an SIB.

[0454] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends SIB1.

[0455] In some embodiments, a first network device of a first cell determines the MIB of a first cell based on whether the first cell periodically sends an SIB, including but not limited to at least one of the following:

[0456] The verification method of MIB is determined based on whether the first cell periodically sends SIB;

[0457] Determine whether the MIB contains the first bit based on whether the first cell periodically sends the SIB;

[0458] The content of the second bit in the MIB is determined based on whether the first cell periodically sends the SIB.

[0459] In some embodiments, the MIB of the first cell explicitly indicates whether the first cell periodically transmits SIBs. For example, the MIB of the first cell has an indication bit indicating whether the first cell periodically transmits SIBs. For instance, the MIB of the first cell explicitly indicates whether the first cell periodically transmits SIB1.

[0460] In some embodiments, the MIB of the first cell implicitly indicates whether the first cell periodically transmits SIBs. For example, when the first cell does not periodically transmit SIBs, the MIB may include PUCCH resources containing scheduling information (e.g., DCI) for SIB1. Alternatively, when the first cell periodically transmits SIBs, the MIB may not include PUCCH resources containing scheduling information (e.g., DCI) for SIB1. Again, for example, the MIB of the first cell implicitly indicates whether the first cell periodically transmits SIB1.

[0461] In some embodiments, the method of MIB verification determines whether the first cell periodically transmits SIB.

[0462] For example, if the first cell periodically transmits SIBs, then the first cell's MIB uses a first verification method. If the first cell does not periodically transmit SIBs, then the first cell's MIB uses a second verification method. In this case, if the terminal successfully verifies the first cell's MIB using the first verification method, it is determined that the first cell periodically transmits SIBs; otherwise, it is determined that the first cell does not periodically transmit SIBs. Alternatively, if the terminal successfully verifies the first cell's MIB using the second verification method, it is determined that the first cell does not periodically transmit SIBs; otherwise, it is determined that the first cell periodically transmits SIBs.

[0463] In some embodiments, it is determined whether the first cell periodically transmits the SIB based on the verification algorithm used by the MIB. For example, different verification algorithms may correspond to different polynomials used to generate the Cyclic Redundancy Check (CRC) code.

[0464] In some embodiments, it is determined whether the first cell periodically transmits an SIB based on the verification mask used by the MIB.

[0465] For example, taking CRC as an example, the check mask can be (CRC mask). For example, the information bits of the MIB and the bit sequence generated based on the polynomial are XORed to obtain a CRC of a specified length, and the specified length CRC and the check mask are XORed and appended to the back end of the MIB, which is then uniformly sent to the terminal by the network device.

[0466] In some embodiments, it is determined whether the first cell periodically transmits the SIB based on whether the MIB contains the first bit.

[0467] For example, an unused idle bit and / or reserved bit in the MIB can be used as the first bit. There can be one or more first bits. Different values ​​of the first bit represent whether the first cell periodically transmits the SIB.

[0468] Based on the indication content of the second bit contained in the MIB, it is determined whether the first cell periodically transmits the SIB.

[0469] In some embodiments, a new bit can be added to the MIB or an idle bit in the MIB can be used as a second bit. There can be one or more second bits. The indication content of the second bit corresponds to its value. Based on the indication content of the second bit, it is determined whether the first cell periodically transmits the SIB.

[0470] In some embodiments, a second network device of the second cell transmits the cell configuration of the first cell. Exemplarily, this cell configuration can be used by the terminal to determine whether the first cell periodically transmits SIBs. For example, the cell configuration can be used by the terminal at least to determine whether to periodically transmit SIB1.

[0471] In some embodiments, the cell configuration includes at least one of the following:

[0472] The first information indicates whether the first cell should periodically send SIBs;

[0473] The second piece of information indicates whether the first cell should send SIBs based on an on-demand mechanism;

[0474] The third information is used by the terminal to send a first request to the first cell, and / or the third information is used by the terminal to send a second request to the second cell; the first request and / or the second request are used by the terminal to request an SIB from the first cell.

[0475] In some embodiments, when the cell configuration includes the first information, the second information may be omitted from the cell configuration.

[0476] In some embodiments, when the cell configuration includes second information, the first information may be omitted from the cell configuration.

[0477] In some embodiments, when the cell configuration includes third information, the first and second information may be omitted from the cell configuration. For example, this cell configuration is equivalent to configuring a terminal to request the SIB of the first cell through a first request and / or a second request.

[0478] In some embodiments, the third information may include at least one of the following:

[0479] The method of sending the first request may include, for example, one-time sending and / or repeated sending;

[0480] Receive time-domain location information of the time window.

[0481] In some embodiments, if the third information does not contain time-domain location information of the receiving time window, the sending method of the first request can be assumed to be a one-time sending, and the indication information of the sending method can be omitted.

[0482] When the terminal recovers from the overlay vulnerability, the method for obtaining the SIB of the first cell is determined based on whether the first cell periodically sends the SIB.

[0483] In some embodiments, the coverage vulnerability here may be an area without network coverage.

[0484] When the terminal receives a system broadcast change instruction from the first cell, it determines the method of obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs.

[0485] In some embodiments, if a terminal receives a system broadcast change indication from a first cell, it indicates that the first cell has updated its SIBs. For example, if the first cell has a system broadcast change indication, the indication may indicate whether SIB1 and / or SIBn have been updated, where n can be a positive integer greater than or equal to 2. If SIB1 has been updated, the terminal needs to obtain the SIB1 of the first cell. If SIBn has been updated, the terminal needs to obtain the SIB1 of the first cell and retrieve the resource configuration of SIBn based on SIB1.

[0486] When the terminal has a positioning requirement, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0487] For example, when a terminal has a satellite positioning requirement, it needs to obtain the SIBs related to positioning. For instance, if a terminal has a positioning requirement, it needs to obtain the timing SIB9 of the satellite positioning system. And to obtain SIB9, the terminal needs to obtain the configuration information of SIB9 based on SIB1.

[0488] When the terminal receives the paging downlink control information (DCI) indicating system information updates from the first cell, it determines the method for obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs.

[0489] In some embodiments, if the terminal paging downlink control information (DCI) indicates that the system information has been updated, it means that the SIB has been updated. Similarly, if the terminal needs to camp or access the first cell, it needs to obtain the updated SIB. Therefore, it is necessary to determine the method of obtaining the SIB of the first cell.

[0490] When the validity period of the SIB of the first cell stored in the terminal expires, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0491] In some embodiments, the SIB of the first cell has a certain validity period. If the validity period expires, the terminal may not be able to determine whether the SIB is still valid and needs to reacquire the SIB of the first cell. Therefore, it is necessary to determine the method of acquiring the SIB of the first cell.

[0492] S2302: The terminal determines whether the first cell periodically sends SIBs.

[0493] In some embodiments, the terminal determines whether the first cell periodically sends an SIB based on the MIB and / or cell configuration of the first cell.

[0494] In some embodiments, the terminal determines whether the first cell periodically sends an SIB during the current time period based on the MIB and / or cell configuration of the first cell.

[0495] S2303: The terminal determines the method for obtaining the SIB of the first cell.

[0496] In some embodiments, the terminal determines the method for obtaining the SIB of the first cell based on whether the first cell periodically sends the SIB.

[0497] In some embodiments, SIBs are periodically transmitted in the first cell, and SIBs are received from the first cell at corresponding times according to the transmission period of the first cell.

[0498] In some embodiments, the SIB is transmitted non-periodically in the first cell, and the method for obtaining the SIB of the first cell is determined according to the cell type of the first cell.

[0499] In some embodiments, if the first cell transmits SIBs aperiodically, and if the first cell is a first-type cell that transmits SIBs on demand, it is determined to request an SIB from the first cell based on the request information.

[0500] In some embodiments, if the first cell transmits SIBs aperiodically, and if the first cell is a second type of cell that does not transmit SIBs, the SIB of the first cell is determined to be obtained from the reference cell (or anchor cell) of the first cell.

[0501] In some embodiments, when the terminal has a cell reselection requirement, the method of obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

[0502] For example, if a terminal has a need for cell reselection and the first cell sends an SIB non-periodically, the terminal determines to send a first request to the first cell to request the first cell SIB.

[0503] For example, if a terminal has a need for cell reselection and the first cell sends SIBs non-periodically, it determines to send a first request for the first cell SIB to the first cell before reselecting to the first cell.

[0504] Before reselecting to the first cell, a first request is sent to the first cell, which can be used to request the SIB.

[0505] For example, during the cell reselection process, the terminal sends a first request to the first cell.

[0506] In some embodiments, the first request may include: identification information of the requested SIB. For example, the SIB requested by the terminal may be SIB1. In some embodiments, the identification information of the SIB may be omitted from the first request. For example, the SIB requested by the terminal before reselecting to the first cell may default to a specified SIB. The specified SIB may include, but is not limited to, SIB1.

[0507] In some embodiments, the first request may further include: the cell identifier of the first cell. It is worth noting that if the terminal sends the first request to the first cell, the cell identifier of the first cell is optional. For example, if the terminal sends the first request from the resource location where the first request was sent in the first cell, the first request may not carry the cell identifier of the first cell.

[0508] In some embodiments, the terminal may request an SIB from the first cell based on Msg1 of the four-step random access request.

[0509] In some embodiments, the terminal may request an SIB from the first cell based on Msg3 of the four-step random access request.

[0510] In some embodiments, the terminal may request an SIB from the first cell based on the MsgA of a two-step random access request.

[0511] In some embodiments, the terminal has a cell reselection requirement and the first cell non-periodicly transmits SIBs. The terminal determines that after reselecting to the first cell, it will send a first request to the first cell to request the first cell SIB.

[0512] For example, if a terminal has a need for cell reselection and the first cell sends an SIB non-periodically, it determines to send a second request to the second cell requesting the SIB of the first cell.

[0513] In some embodiments, the network device may reserve a specific random access preamble. When the terminal sends a random access message carrying the specific random access preamble, it can be considered that the terminal is requesting an SIB from the network device.

[0514] In some embodiments, there are multiple specific random access preambles. For example, different specific random access preambles correspond to different SIBs. Thus, the terminal selects the corresponding specific random access preamble to send a random access message based on the correspondence and the SIB it needs to request.

[0515] S2304: The terminal sends the first request to the first cell.

[0516] In some embodiments, if the terminal determines that the method for obtaining the SIB of the first cell is to obtain the SIB of the first cell by sending a first request to the first cell, then the terminal sends a first request to the first cell.

[0517] For example, if the first cell is a cell that sends an SIB based on a terminal request, then the terminal sends a first request to the first cell.

[0518] For example, if the first cell is a cell that transmits SIBs on demand, then the terminal sends a first request to the first cell.

[0519] For example, if the first cell sends SIBs based on terminal requests or sends SIBs on demand and the cell is configured to obtain the SIBs of the first cell based on the first request, then the terminal sends the first request to the first cell.

[0520] In some embodiments, the terminal has a cell reselection requirement and the first cell non-periodicly transmits SIBs. The terminal determines that after reselecting to the first cell, it will send a first request to the first cell to request the first cell SIB.

[0521] For example, if the terminal detects the MIB or completes downlink synchronization with the first cell, it can be assumed that the terminal has reselected to the first cell.

[0522] After the terminal reselects to the first cell, it can request an SIB from the first cell.

[0523] The first request may include, but is not limited to, requesting an SIB from the first cell during the process of establishing a connection between the terminal and the first cell.

[0524] In some embodiments, after the terminal accesses or camps on the first cell, it sends a first request to the first cell.

[0525] S2305: The first cell sends a request response.

[0526] In some embodiments, the request response may include: a terminal-requested SIB sent by the first cell.

[0527] In some embodiments, the request response may be an RRC message indicating the SIB requested by the sending terminal.

[0528] In some embodiments, the request response may be an RRC message indicating the SIB to be broadcast.

[0529] In some embodiments, the request response may indicate whether the SIB requested by the terminal will be sent. If the request response indicates that the first cell and / or the second cell will send the SIB requested by the terminal, the terminal listens for the SIB sent by the first cell and / or the second cell.

[0530] In some embodiments, the request response may also carry resource location information of the SIB requested by the terminal sent by the first cell and / or the second cell, which facilitates the terminal to listen to the SIB at the resource location indicated by the resource location information, for example, listening to SIB1.

[0531] S2306: The terminal determines whether the network device has detected the first request.

[0532] In some embodiments, the terminal listens for the response to the first request within a receiving time window after sending the first request. If a response is received within the time window, it is determined that the network device has received the first request; otherwise, it is assumed that the terminal has not received the response.

[0533] In some embodiments, the terminal determines whether the network side has received the first request based on whether it has received the SIB requested by the terminal from the network side. For example, if the terminal detects that the first network device sends its own requested SIB, it determines that the network side has received the first request; otherwise, it can be assumed that the network side has not received the first request.

[0534] In some embodiments, the terminal determines whether the network side has received the first request based on whether it receives a request response to the first request. For example, if the terminal receives a request response sent by the first network device, it determines that the network side has received the first request; otherwise, it can be assumed that the network side has not received the first request.

[0535] S2307: Continue sending the first request to the first cell.

[0536] In some embodiments, if it is determined that the network device has not detected the first request, the first request is resent.

[0537] In some embodiments, if it is determined that the network device has not detected the first request, the transmission power is increased and the first request is retransmitted until the number of transmissions of the first request reaches the maximum number or the transmission power of the first request reaches the maximum transmission power.

[0538] In some embodiments, if it is determined that the network device has detected the first request, the sending of the first request to the network device is suspended regardless of whether the network side sends the SIB of the terminal request.

[0539] In some embodiments, if a terminal has urgent service transmission needs, it can choose to access or camp on other cells that periodically send SSBs and / or SIBs.

[0540] As shown in Figure 3A, this embodiment of the disclosure provides a method for requesting an SIB, which can be executed by a terminal. The method may include:

[0541] S3101: Receive network information.

[0542] In some embodiments, the terminal receives the MIB of the first cell.

[0543] In some embodiments, the terminal receives the cell configuration of a first cell. Exemplarily, the terminal receives the cell configuration of the first cell in a second cell.

[0544] In this embodiment of the disclosure, the relevant description of network information can be found in the embodiment corresponding to Figure 2A.

[0545] S3102: Determine whether the first cell periodically sends SIBs.

[0546] In some embodiments, the terminal determines whether the first cell periodically sends SIB1 based on the received network information.

[0547] In some embodiments, the optional steps of S3102 can be found in any embodiment of S2102 corresponding to FIG2A.

[0548] S3103: Determine the method for obtaining the SIB of the first cell.

[0549] In some embodiments, the terminal determines the method for obtaining the SIB of the first cell based on the determined result.

[0550] In some embodiments, optional implementations of S3103 may refer to any embodiment of S2103 corresponding to FIG2A.

[0551] S3104: The terminal sends the first request.

[0552] In some embodiments, if the terminal determines that the network side sends an SIB based on the terminal's request, the terminal sends a first request to the first cell.

[0553] In some embodiments, the terminal sends a first request to the first cell before accessing or camping on the first cell.

[0554] In some embodiments, after the terminal accesses or camps on the first cell, it sends a first request to the first cell.

[0555] In some embodiments, optional implementations of S3104 may refer to any embodiment of S2104 in FIG2A.

[0556] In some embodiments, optional implementations of S3104 may refer to any embodiment of S2304 corresponding to FIG2C.

[0557] S3105: Receive request response.

[0558] In some embodiments, a request response sent by the first cell is received.

[0559] In some embodiments, a request response sent by a second cell is received.

[0560] In some embodiments, a request response sent by the network side is received within a receiving time window after the first request is sent.

[0561] In some embodiments, optional implementations of S3105 may refer to any embodiment of S2105 in FIG2A.

[0562] In some embodiments, optional implementations of S3105 may refer to any embodiment of S2305 corresponding to FIG2C.

[0563] S3106; Determine whether the network device has received the first request.

[0564] In some embodiments, it is determined whether the network device has received the first request based on the result of receiving the request response.

[0565] In some embodiments, optional implementations of S3106 may refer to any embodiment of S2106 in FIG2A.

[0566] In some embodiments, optional implementations of S3106 may refer to any embodiment of S2306 corresponding to FIG2C.

[0567] S3107: Resend the first request.

[0568] In some embodiments, if it is determined that the network device has not received the first request, the first request is resent.

[0569] In some embodiments, if it is determined that the network device has not detected the first request, the first request is resent.

[0570] In some embodiments, if it is determined that the network device has not detected the first request, the transmission power is increased and the first request is retransmitted until the number of transmissions of the first request reaches the maximum number or the transmission power of the first request reaches the maximum transmission power.

[0571] In some embodiments, if it is determined that the network device has detected the first request, the sending of the first request to the network device is suspended regardless of whether the network side sends the SIB of the terminal request.

[0572] In some embodiments, if a terminal has urgent service transmission needs, it can choose to access or camp on other cells that periodically send SSBs and / or SIBs.

[0573] In some embodiments, optional implementations of S3107 may refer to any embodiment of S2107 in FIG2A.

[0574] In some embodiments, optional implementations of S3107 may refer to any embodiment of S2307 corresponding to FIG2C.

[0575] As shown in Figure 3B, this embodiment of the disclosure provides a method for requesting an SIB, which can be executed by a terminal. The method may include:

[0576] S3201: Receive network information.

[0577] In some embodiments, the terminal receives the MIB of the first cell.

[0578] In some embodiments, the terminal receives the cell configuration of a first cell. Exemplarily, the terminal receives the cell configuration of the first cell in a second cell.

[0579] In this embodiment of the disclosure, the relevant description of network information can be found in the embodiment corresponding to Figure 2B.

[0580] S3202: Determine whether the first cell periodically sends SIBs.

[0581] In some embodiments, the terminal determines whether the first cell periodically sends SIB1 based on the received network information.

[0582] In some embodiments, the optional steps of S3202 can be found in any embodiment of S2202 corresponding to FIG2B.

[0583] S3203: Determine the method for obtaining the SIB of the first cell.

[0584] In some embodiments, the terminal determines the method for obtaining the SIB of the first cell based on the determined result.

[0585] In some embodiments, optional implementations of S3203 may refer to any embodiment of S2203 corresponding to FIG2B.

[0586] S3204: The terminal sends a second request.

[0587] In some embodiments, the terminal sends a second request to the second cell.

[0588] In some embodiments, if the terminal determines that the network side sends an SIB based on the terminal's request, then the terminal sends a second request to the second cell.

[0589] In some embodiments, the terminal sends a second request to the second cell before accessing or camping on the first cell.

[0590] In some embodiments, after the terminal accesses or camps on the first cell, it sends a second request to the second cell.

[0591] In some embodiments, optional implementations of S3204 may refer to any embodiment of S2204 in FIG2B.

[0592] S3205: Receive request response.

[0593] In some embodiments, a request response sent by the first cell is received.

[0594] In some embodiments, a request response sent by a second cell is received.

[0595] In some embodiments, a request response sent by the network side is received within a receiving time window after the second request is sent.

[0596] In some embodiments, optional implementations of S3105 may refer to any embodiment of S2205 in FIG2B.

[0597] S3206; Determine whether the network device has received the second request.

[0598] In some embodiments, it is determined whether the network device has received the second request based on the result of receiving the request response.

[0599] In some embodiments, optional implementations of S3206 may refer to any embodiment of S2206 in FIG2B.

[0600] S3207: Resend the second request.

[0601] In some embodiments, if it is determined that the network device has not received the second request, the second request is resent.

[0602] In some embodiments, if it is determined that the network device has not detected the second request, the second request is resent.

[0603] In some embodiments, if it is determined that the network device has not detected the second request, the transmission power is increased and the second request is retransmitted until the number of transmissions of the second request reaches the maximum number or the transmission power of the second request reaches the maximum transmission power.

[0604] In some embodiments, if it is determined that the network device has detected the second request, the sending of the second request to the network device is suspended regardless of whether the network side sends the SIB of the terminal request.

[0605] In some embodiments, if a terminal has urgent service transmission needs, it can choose to access or camp on other cells that periodically send SSBs and / or SIBs.

[0606] In some embodiments, alternative implementations of S3207 may refer to any embodiment of S2207 in FIG2B.

[0607] As shown in Figure 4, this embodiment of the disclosure provides a method for requesting an SIB, which can be executed by a first network device of a first cell. The method may include:

[0608] S4101: Send MIB.

[0609] In some embodiments, the MIB verification method is determined based on whether the first cell periodically transmits SIBs. For example, the MIB verification algorithm is determined based on whether the first cell periodically transmits SIBs. Also for example, the MIB verification mask is determined based on whether the first cell periodically transmits SIBs.

[0610] In some embodiments, whether the MIB contains the first bit is determined based on whether the first cell periodically transmits the SIB.

[0611] In some embodiments, the indication content of the second bit contained in the MIB is determined based on whether the first cell periodically transmits the SIB.

[0612] In the embodiments disclosed herein, optional implementations of S4101 can be found in the embodiments corresponding to Figures 2A to 2C.

[0613] S4102: Receive the first request.

[0614] In some embodiments, the first request is used by the terminal to request the SIB of the first cell.

[0615] In some embodiments, the first request may be a request message sent by the terminal before it accesses or camps on the first cell.

[0616] In some embodiments, the first request may be a request message sent after the terminal accesses or camps on the first cell.

[0617] In some embodiments, the first request includes a random access request.

[0618] In some embodiments, the random access request includes: a first random access preamble indicating the request for an SIB.

[0619] In some embodiments, the relevant description of the first request can be found in the embodiments corresponding to FIG2A and / or FIG2C.

[0620] S4103: Send request response.

[0621] In some embodiments, the request response is used by the terminal to determine whether the first network device has received the first request.

[0622] In some embodiments, the request response includes a random access response.

[0623] In some embodiments, a random access response is used to instruct the terminal that a first network device has determined that a random access request for a request SIB has been received.

[0624] In some embodiments, after receiving the first request, a request response is sent within a receiving time window.

[0625] In some embodiments, optional implementations of S4103 may refer to any optional embodiment of S2105 in FIG2A.

[0626] In some embodiments, alternative implementations of S4103 may refer to any alternative embodiment of S2305 in FIG2C.

[0627] S4104: Continue receiving the first request.

[0628] In some embodiments, the first request to continue receiving may be the first request after the transmission power is increased.

[0629] In some embodiments, a description of the first request to continue receiving may be found in any of the alternative embodiments of S2107 in FIG2A.

[0630] In some embodiments, a description of the first request to continue receiving may be found in any of the alternative embodiments of S2307 in FIG2C.

[0631] It is worth noting that:

[0632] In some embodiments, S4103 and S4104 are optional steps. For example, if the first cell determines that it will not respond to the terminal's request, it may not need to send a request response and / or continue to receive the first request.

[0633] In some embodiments, S4101 is an optional step. For example, the MIB of the first cell can be sent by the first cell or by the second cell. If the MIB of the first cell is sent by the second cell, or if the terminal determines whether the first cell periodically sends an SIB based on the cell configuration of the first cell sent by the second cell, then S4101 can be omitted.

[0634] In some embodiments, S4104 may be an optional step; for example, the terminal may not continue to send the first request. For instance, assuming the cell configuration does not specify that the terminal can repeatedly send the first request, the second network device does not need to continue receiving the first request.

[0635] As shown in Figure 5, this embodiment of the present disclosure provides a method for requesting System Information Block (SIB), wherein the method is executed by a second network device of a second cell, and includes:

[0636] S5101: Send the cell configuration of the first cell.

[0637] In some embodiments, the cell configuration includes at least one of the following:

[0638] The first information indicates whether the first cell should periodically send SIBs;

[0639] The second piece of information indicates whether the first cell should send SIBs based on an on-demand mechanism;

[0640] The third information is used by the terminal to send a first request to the first cell, and / or the third information is used by the terminal to send a second request to the second cell; the first request and / or the second request are used by the terminal to request an SIB from the first cell.

[0641] In some embodiments, when the cell configuration includes the first information, the second information may be omitted from the cell configuration.

[0642] In some embodiments, when the cell configuration includes second information, the first information may be omitted from the cell configuration.

[0643] In some embodiments, when the cell configuration includes third information, the first and second information may be omitted from the cell configuration. For example, this cell configuration is equivalent to configuring a terminal to request the SIB of the first cell through a first request and / or a second request.

[0644] In some embodiments, the relevant description of the cell configuration can be found in the corresponding embodiments of Figures 2A to 2C.

[0645] In some embodiments, S5101 is an optional step. For example, the cell configuration of the first cell can be sent by the first cell or by other cells. If the terminal determines whether the first cell periodically sends the SIB based on the MIB of the first cell, then the second network device of the second cell does not need to send the cell configuration of the first cell.

[0646] In some other embodiments, S5101 can be executed independently. For example, the second cell sends the cell configuration of the first cell to the terminal, but the terminal requests the SIB directly from the first cell instead of the second cell.

[0647] S5102: Receive the second request sent by the terminal.

[0648] The second request is used by the terminal to request the first cell to send the System Information Block (SIB).

[0649] In some embodiments, the second request includes at least one of the following:

[0650] The signage for the first residential area;

[0651] The identification information of the requested SIB.

[0652] In some embodiments, the second request may include: identification information of the requested SIB. For example, the SIB requested by the terminal may be SIB1.

[0653] In some embodiments, the identification information of the SIB may be omitted in the second request. For example, the SIB requested by the terminal before reselecting to the first cell may default to a specified SIB. The specified SIB may include, but is not limited to, SIB1.

[0654] In some embodiments, the cell identifier may include, but is not limited to, physical cell identifier and / or high-rise cell identifier.

[0655] In some embodiments, optional implementations of S5102 may refer to any optional embodiment of S2305 in FIG2C.

[0656] In some embodiments, the second network device receives a second request sent by the terminal when there is a cell reselection requirement.

[0657] S5103: Send the second request.

[0658] In some embodiments, a second request is sent to the first cell.

[0659] For example, a second request is sent to the first cell based on the airspace and / or tunnel between the first and second cells.

[0660] In some embodiments, if the second network device sends the SIB in place of the first cell, the second network device may send the SIB of the first cell to the terminal, and the second network device does not need to send the second request to the first cell.

[0661] In some embodiments, if the second network device is a non-SIB transmission device, the second network device may transmit SIBs in place of the first cell in other cells.

[0662] S5104: Continue receiving the second request.

[0663] In some embodiments, S5104 may be an optional step; for example, the terminal may not continue to send the second request. For instance, assuming the cell configuration does not specify that the terminal can repeatedly send the second request, the second network device does not need to continue receiving the second request.

[0664] This invention provides a process for requesting SIB1 via RRC-IDLE / INACTIVE, enabling the network side to avoid periodically sending SIB1 and further obtain network energy-saving gains.

[0665] Option 1: Based on the SIB1 request of the target cell initiated by cell reselection, specifically, it may include: sending an SIB1 request to the target cell before cell reselection, so as to trigger the target cell to trigger the terminal to send SIB1 to the terminal in the target cell during reselection. The target cell corresponds to the aforementioned first cell.

[0666] As shown in Figure 6A, this disclosure provides a method that may include:

[0667] Step 1: The state of a certain cell is switched, and the Network Energy Saving (NES) mechanism is implemented.

[0668] Step 2: The terminal receives the cell configuration of SIB1 as needed when it receives the cell requesting reselection in a regular cell.

[0669] Step 3: Send an Uplink (UP) WUS to the target cell. The terminal evaluates cell reselection and determines the target cell. If the target cell does not have SIB1 transmitting, the terminal triggers an SIB1 request process to the target cell, for example, by sending a WUS. The WUS can be a random access preamble. The random access preamble can be a pre-reserved random access preamble by the system. Sending the random access preamble indicates a request for SIB1 or SIB and OSI.

[0670] Step 4: The terminal listens to the SIB1 and / or OSI transmitted by the target cell.

[0671] The terminal receives SIB1 from the target cell's System Information Radio Network Temporary Identifier (SI-RNTI). If it does not receive SIB1 according to the SIB1 transmission cycle, the terminal continues to increase its power and transmit WUS. This continues until it receives SIB1, reaches its maximum uplink transmit power, reaches the cell's maximum allowed uplink transmit power, or reaches the maximum number of random access preamble transmissions. At this point, it notifies the higher layers that the SIB1 request failed.

[0672] Before steps 1 and 2, the terminal receives a system broadcast in the current cell. This system broadcast contains configuration information about neighboring cells, such as at least one of the following: configuration information for sending UL WUS, cell common configuration, SIB broadcast status indication information, etc. The configuration is associated with a neighboring cell ID (e.g., PCI and frequency).

[0673] Before steps 1, 2, and 3, the current cell and neighboring cells exchange information indicating the cell's SIB1 broadcast status.

[0674] Before initiating a UL WUS request to SIB1, the terminal first checks the broadcast status of the target cell SIB1. If there is no broadcast, then it requests SIB1.

[0675] Furthermore, the terminal can obtain the SIB1 broadcast status indication (i.e., whether it is in broadcast status) based on the reception of the target cell MIB.

[0676] The MIB indicates the broadcast status of SIB1, for CD-SSBs or SSBs transmitted on the synchronization grid.

[0677] Option 1: The absence of an RMSI can be indicated by the SSB subcarrier offset (ssb-SubcarrierOffset) in the MIB, and SIB1 can be requested, for example, ssb-SubcarrierOffset = 30 (FR1) or ssb-SubcarrierOffset = 14 (FR2). Option 2: The spare bit in the MIB can also indicate that SIB1 is not present but can be requested.

[0678] Option 3: Specify a separate CRC for a MIB, which is different from the traditional CRC and is used to indicate that SIB1 is not available but can be requested. This new CRC can be calculated based on the original CRC; for example, the new CRC is equal to the original CRC + 1.

[0679] Option 4: Define at least two CRC masks. One CRC mask indicates that SIB1 is not sent but a request is possible. The other CRC mask indicates that no SIB1 was sent. A third CRC mask can also be defined to indicate that SIB1 was sent.

[0680] Option 5: The MIB carries an indication message indicating whether there is no SIB available to request, no SIB is available, or an SIB is available.

[0681] Option 2: Based on the SIB1 request of the target cell initiated by cell reselection, send the SIB1 request to the current cell before cell reselection.

[0682] As shown in Figure 6B, this disclosure provides a method that may include:

[0683] Step 1: The state of a certain cell is switched, and the Network Energy Saving (NES) mechanism is implemented.

[0684] Step 2: The terminal receives the cell configuration of SIB1 as needed when it receives the cell requesting reselection in a regular cell.

[0685] Step 3: Send an uplink (UP) WUS to the current cell. The terminal evaluates cell reselection and determines the target cell. If the target cell does not have SIB1 transmitting, the terminal triggers an SIB1 request process to the target cell, for example, by sending a WUS. The WUS can be a random access preamble. The random access preamble can be a pre-reserved random access preamble by the system. Sending the random access preamble indicates a request for SIB1 or SIB and OSI.

[0686] Step 4: The current cell sends an SI request to the target cell;

[0687] Step 5: The target cell sends SIB1 and / or OSI.

[0688] The terminal evaluates cell reselection and determines the target cell for cell reselection. If the target cell does not have SIB1 being transmitted, the terminal triggers the process of initiating an SIB1 request to the current cell.

[0689] For example, an RRCSystemInfoReq terminal st is sent to the current cell. The signaling includes the cell ID requesting SIB1, and / or indication information for requesting SIB1. It may also indicate the request for OSI, and / or indication information for SIBx.

[0690] After receiving the instruction, the current cell forwards the SIB1 request instruction and / or OSI request instruction and / or SIBx instruction information to the target cell (SIBx means per SIB request).

[0691] The terminal listens for SI-RNTI in the target cell to receive SIB1.

[0692] Before steps 1 and 2, the terminal receives a system broadcast in the current cell. This system broadcast contains configuration information about neighboring cells, such as at least one of the following: cell common configuration, SIB broadcast status indication information, etc. The configuration is associated with a neighboring cell ID (e.g., PCI and frequency).

[0693] Before steps 1, 2, and 3, the current cell and neighboring cells exchange information indicating the cell's SIB1 broadcast status.

[0694] Before initiating a request for SIB1, the terminal first checks the broadcast status of the target cell SIB1. If there is no broadcast, then it requests SIB1.

[0695] Furthermore, the terminal can obtain the SIB1 broadcast status indication (i.e., whether it is in broadcast status) based on the reception of the target cell MIB.

[0696] The MIB indicates the broadcast status of SIB1, for CD-SSBs or SSBs transmitted on the synchronization grid.

[0697] Option 1: The ssb-SubcarrierOffset in the MIB can indicate that RMSI is not included, and SIB1 can be requested, for example, ssb-SubcarrierOffset = 30 (FR1) or ssb-SubcarrierOffset = 14 (FR2). Option 2: The spare bit in the MIB can also indicate that SIB1 is not included but can be requested.

[0698] Option 3: Specify a separate CRC for a MIB, which is different from the traditional CRC and is used to indicate that SIB1 is not available but can be requested. This new CRC can be calculated based on the original CRC; for example, the new CRC is equal to the original CRC + 1.

[0699] Option 4: Define at least two CRC masks. One CRC mask indicates that SIB1 is not sent but a request is possible. The other CRC mask indicates that no SIB1 was sent. A third CRC mask can also be defined to indicate that SIB1 was sent.

[0700] Option 5: The MIB carries an indication message indicating whether there is no SIB available to request, no SIB is available, or an SIB is available.

[0701] Option 3: Initiate an SIB1 request for the target cell based on cell reselection -> After cell reselection, send an SIB1 request to the current cell.

[0702] As shown in Figure 6C, this disclosure provides a method that may include:

[0703] Step 1: The state of a certain cell is switched, and the Network Energy Saving (NES) mechanism is implemented.

[0704] Step 2: The terminal receives the cell configuration of SIB1 as needed when it receives the cell requesting reselection in a regular cell.

[0705] Step 3: After reselecting the target cell, send an uplink (UP) WUS to the target cell. The terminal evaluates the cell reselection and determines the target cell. If the target cell does not have SIB1 transmitting, the terminal triggers an SIB1 request process to the target cell, for example, by sending a WUS. The WUS can be a random access preamble. The random access preamble can be a pre-reserved random access preamble by the system. Sending the random access preamble indicates a request for SIB1 or SIB and OSI.

[0706] Step 4: The target cell sends SIB1 and / or OSI.

[0707] The terminal evaluates cell reselection, determines the target cell for cell reselection, and performs cell reselection. If the target cell does not have SIB1 transmitting, then:

[0708] Option a: The terminal triggers the SIB1 request process to the target cell, for example, by sending a WUS, which can be a random access preamble.

[0709] The random access preamble can be a pre-reserved random access preamble in the system. Sending the random access preamble indicates a request for SIB1 or SIB and OSI.

[0710] Option b: The terminal triggers the process of initiating an SIB1 request to the current cell.

[0711] For example, sending RRCSystemInfoReq terminal st to the current cell contains an indication message requesting SIB1.

[0712] The following follow-up actions are required:

[0713] Option a-1: The terminal listens for SIB1 in the target cell's SI-RNTI. If no SIB1 is received according to the SIB1 transmission cycle, the terminal continues to increase its power and transmit WUS until SIB1 is received, or the terminal's maximum uplink transmit power, the cell's maximum allowed uplink transmit power, or the maximum number of random access preamble transmissions is reached. Then, the terminal notifies the higher layers that the SIB1 request failed.

[0714] Option a-2: If the terminal receives the RAPID header of its own transmitted random access preamble, the random access is considered successfully completed; otherwise, it continues to send random access preambles with increasing power. Upon success, it notifies the higher layer that it has received the SI request for confirmation.

[0715] Option b-1: The terminal listens for SI-RNTI in the target cell to receive SIB1.

[0716] Before steps 1 and 2, the terminal receives a system broadcast in the current cell. This system broadcast contains configuration information about neighboring cells, such as at least one of the following: configuration information for sending UL WUS, cell common configuration, SIB broadcast status indication information, etc. The configuration is associated with a neighboring cell ID (e.g., PCI and frequency).

[0717] Before steps 1, 2, and 3, the current cell and neighboring cells exchange information indicating the cell's SIB1 broadcast status.

[0718] Before initiating a UL WUS request for SIB1, the terminal first confirms the broadcast status of the target cell SIB1. If there is no broadcast, the terminal then requests SIB1. Furthermore, the terminal can obtain the SIB1 broadcast status indication (i.e., whether it is in a broadcast state) based on the reception of the target cell MIB.

[0719] The MIB indicates the broadcast status of SIB1, for CD-SSBs or SSBs transmitted on the synchronization grid.

[0720] Option 1: You can indicate that RMSI is not included by using ssb-SubcarrierOffset in the MIB, and you can request SIB1.

[0721] For example, ssb-SubcarrierOffset = 30 (FR1) or ssb-SubcarrierOffset = 14 (FR2).

[0722] Option 2: The spare bit in the MIB can also indicate that SIB1 is not available but can be requested.

[0723] Option 3: Specify a separate CRC for a MIB, which is different from the traditional CRC and is used to indicate that SIB1 is not available but can be requested. This new CRC can be calculated based on the original CRC; for example, the new CRC is equal to the original CRC + 1.

[0724] Option 4: Define at least two CRC masks. One CRC mask indicates that SIB1 is not sent but a request is possible. The other CRC mask indicates that no SIB1 was sent. A third CRC mask can also be defined to indicate that SIB1 was sent.

[0725] Option 5: The MIB carries an indication message indicating whether there is no SIB available to request, no SIB is available, or an SIB is available.

[0726] Option 4: Recovering from the coverage hole triggers the endpoint request SIB1.

[0727] The following factors or events may also trigger the terminal to initiate the SIB1 request process:

[0728] The terminal recovered from the overlay vulnerability;

[0729] Received system broadcast change instruction;

[0730] Receive system broadcast change indication (systemInfoModification) or public alarm notification indication (etwsAndCmasIndication) from paging DCI.

[0731] Requests based on high-level location;

[0732] It has been 3 hours since the last valid SIB1 was stored.

[0733] In order to support the above-mentioned SIB1 request process for the current serving cell, the current serving cell also needs to configure the SIB1 request configuration information in the system broadcast configuration, such as the UL WUS-specific random access preamble.

[0734] This invention provides a process for requesting SIB1 in the RRC idle / RRC inactive state (RRC-IDLE / INACTIVE), which allows the network side to avoid periodically sending SIB1 and further obtain network energy-saving gains.

[0735] In the embodiments disclosed herein, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations in other embodiments.

[0736] In the embodiments disclosed herein, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations in other embodiments.

[0737] This disclosure also provides apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, or a core network device) in any of the above methods.

[0738] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0739] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a type of microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), a Deep Learning Processing Unit (DPU), etc.

[0740] As shown in Figure 7A, this embodiment of the present disclosure provides a terminal, wherein the terminal includes:

[0741] The processing module 5101 is configured to determine the method of obtaining the SIB of the first cell based on whether the first cell periodically sends the SIB.

[0742] In some embodiments, the terminal may further include: a transmitting module and / or a receiving module.

[0743] In some embodiments, the transmitting module and / or receiving module may correspond to the network interface and / or transceiver antenna of the terminal.

[0744] In some embodiments, the processing module can be used by the terminal to execute information processing-related steps in any SIB request method.

[0745] In some embodiments, the sending module can be used by the terminal to perform information sending-related steps in any SIB request method.

[0746] In some embodiments, the receiving module can be used by the terminal to perform information sending related steps in any SIB request method.

[0747] In some embodiments, the processing module is configured to determine the method of obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs, in accordance with a first condition.

[0748] The first condition includes at least one of the following:

[0749] The terminal has a cell reselection requirement;

[0750] The terminal recovered from the overlay vulnerability;

[0751] The terminal receives a system broadcast change instruction from the first cell;

[0752] The terminal has a positioning requirement;

[0753] The paging downlink control information (DCI) indicating system information of the first cell;

[0754] The validity period of the SIB of the first cell stored in the terminal has expired.

[0755] In some embodiments, the processing module is configured to perform at least one of the following:

[0756] The terminal has a cell reselection requirement and the first cell sends an SIB non-periodically. The terminal has a cell reselection requirement and the first cell sends an SIB non-periodically. The terminal determines to send a first request to the first cell to request the first cell SIB.

[0757] The terminal has a cell reselection requirement and the first cell is sending SIBs non-periodically. The terminal determines to send a second request to the second cell to request the SIB of the first cell.

[0758] In some embodiments, the processing module is configured to perform at least one of the following:

[0759] The terminal has a cell reselection requirement and the first cell sends SIBs non-periodically. It is determined that a first request for the first cell SIB should be sent to the first cell before reselecting to the first cell.

[0760] The terminal has a cell reselection requirement and the first cell sends SIBs non-periodically. It is determined that after reselecting to the first cell, it will send a first request to the first cell to request the first cell SIB.

[0761] In some embodiments, the processing module is configured to perform at least one of the following:

[0762] The terminal has a cell reselection requirement and the first cell sends an SIB non-periodically. The terminal determines to send a random access request to the first cell. The random access request includes a first random access preamble indicating the request SIB.

[0763] In some embodiments, the receiving module is configured to receive a random access response sent by a first network device of the first cell;

[0764] The processing module is configured to determine whether the first network device has received the first request based on the random access response.

[0765] In some embodiments, the sending module is configured to listen for the requested SIB on the first cell after sending the first request, according to the configuration of periodically sending SIBs;

[0766] The processing module is configured to determine whether the first network device has received the first request based on whether the SIB of the request has been listened to.

[0767] In some embodiments, the processing module is configured to, in response to determining that the first network device has not received the first request, determine to increase the transmit power of the random access request and continue sending the random access request.

[0768] In some embodiments, the processing module is configured to determine to stop sending random access requests when the transmit power of the random access request reaches the maximum transmit power and / or the number of transmissions of the first random access preamble reaches the maximum number of transmissions.

[0769] Figure 7B illustrates the execution of a method by a first network device according to an embodiment of this disclosure, including:

[0770] The receiving module 5201 is configured to receive a first request sent by the terminal; the first request is used by the terminal to request a System Information Block (SIB) of the first cell.

[0771] The sending module 5202 is configured to send the SIB requested by the terminal according to the first request.

[0772] In some embodiments, the network device may further include a processing module.

[0773] In some embodiments, the transmitting module and / or receiving module may correspond to the network interface and / or transceiver antenna of the first network device.

[0774] In some embodiments, the processing module may be configured to perform any information processing-related steps in the SIB request method executed by the first network device.

[0775] In some embodiments, the first request includes: a random access request;

[0776] The random access request includes: a first random access preamble indicating the request SIB.

[0777] In some embodiments, the sending module is configured to send a request response to the terminal; the request response is used by the terminal to determine whether the first network device has received the first request.

[0778] In some embodiments, the request response includes: a random access response;

[0779] A random access response is used to instruct the terminal that the first network device has confirmed that a random access request for a request SIB has been received.

[0780] In some embodiments, the first request is a request sent by the terminal before the cell is reselected to the first cell; or, the first request is a request sent by the terminal after the cell is reselected to the first cell.

[0781] In some embodiments, the processing module is configured to perform at least one of the following:

[0782] The verification method of MIB is determined based on whether the first cell periodically sends SIB;

[0783] Determine whether the MIB contains the first bit based on whether the first cell periodically sends the SIB;

[0784] The content of the second bit in the MIB is determined based on whether the first cell periodically sends the SIB.

[0785] In some embodiments, the processing module is configured to perform at least one of the following:

[0786] The MIB verification algorithm is determined based on whether the first cell periodically sends SIBs.

[0787] The check mask of the MIB is determined based on whether the first cell periodically sends the SIB.

[0788] As shown in Figure 7C, this embodiment of the present disclosure provides a second network device, which includes:

[0789] The sending module 5301 is configured to send the cell configuration of the first cell to the terminal; the cell configuration is used at least by the terminal to determine whether the first cell periodically sends SIBs.

[0790] In some embodiments, the cell configuration includes at least one of the following:

[0791] The first information indicates whether the first cell should periodically send SIBs;

[0792] The second piece of information indicates whether the first cell should send SIBs based on an on-demand mechanism;

[0793] The third information is used by the terminal to send a first request to the first cell, and / or the third information is used by the terminal to send a second request to the second cell; the first request and / or the second request are used by the terminal to request an SIB from the first cell.

[0794] As shown in Figure 7D, this embodiment of the present disclosure provides a second network device, which includes:

[0795] The receiving module 5401 is configured to receive a second request sent by the terminal when it has a cell reselection requirement; the second request is used by the terminal to request the first cell to send a System Information Block (SIB).

[0796] In some embodiments, the second network device may further include: a transmitting module and / or a receiving module.

[0797] In some embodiments, the transmitting module and / or receiving module may correspond to the network interface and / or transceiver antenna of the second network device.

[0798] In some embodiments, the processing module can be used by the second network device to perform information processing-related steps in any SIB request method.

[0799] In some embodiments, the sending module is configured to send the second request to a first network device of the first cell.

[0800] This disclosure also provides a communication device, which may include one or more processors; wherein the processors are configured to invoke instructions to cause the communication device to execute a request method for an Information System Block (SIB) that can be implemented in any of the foregoing embodiments.

[0801] In some embodiments, as shown in FIG8A and / or FIG8B, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may also be located outside the communication device 8100.

[0802] The communication device may be the aforementioned terminal or network device. In some embodiments, the network device may be a master node and / or a slave node.

[0803] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the communication steps such as sending and receiving in the above method are performed by the transceivers 8103, and other steps are performed by the processor 8101.

[0804] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, etc., may be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., may be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., may be used interchangeably.

[0805] Optionally, the communication device 8100 further includes one or more interface circuits 8104, which are connected to the memory 8102. The interface circuits 8104 can be used to receive signals from the memory 8102 or other devices, and can be used to send signals to the memory 8102 or other devices. For example, the interface circuits 8104 can read instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0806] The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in this disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG8A. The communication device may be a standalone device or may be part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0807] Figure 8B is a schematic diagram of the structure of chip 8200 provided in an embodiment of this disclosure. For cases where the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of chip 8200 shown in Figure 8B, but it is not limited thereto.

[0808] Chip 8200 includes one or more processors 8201, which are used to invoke instructions to cause chip 8200 to execute any of the above information system block (SIB) request methods.

[0809] In some embodiments, chip 8200 further includes one or more interface circuits 8202 connected to memory 8203. Interface circuits 8202 can be used to receive signals from memory 8203 or other devices, and can also be used to send signals to memory 8203 or other devices. For example, interface circuit 8202 can read instructions stored in memory 8203 and send those instructions to processor 8201. Optionally, terms such as interface circuit, interface, transceiver pin, and transceiver can be used interchangeably.

[0810] In some embodiments, chip 8200 further includes one or more memories 8203 for storing instructions. Optionally, all or part of the memories 8203 may be located outside of chip 8200.

[0811] This disclosure also provides a storage medium storing instructions that, when executed on a communication device 8100, cause the communication device 8100 to perform any of the methods described above. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but it can also be a temporary storage medium.

[0812] This disclosure also provides a program product that, when executed by a communication device 8100, causes the communication device 8100 to execute any of the above-described information system block (SIB) request methods. Optionally, the program product is a computer program product.

[0813] This disclosure also provides a computer program that, when run on a computer, causes the computer to execute the request method for any of the above-described Information System Blocks (SIBs).

[0814] Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the embodiments of this disclosure that follow the general principles of the embodiments of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the embodiments of this disclosure are indicated by the following claims.

[0815] It should be understood that the embodiments disclosed herein are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments disclosed herein is limited only by the appended claims.

Claims

1. A method for requesting System Information Block (SIB), wherein, The method, executed by a terminal, includes: The method for obtaining the SIB of the first cell is determined based on whether the first cell periodically sends SIBs.

2. The method according to claim 1, wherein, The step of determining the method for obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs includes: if a first condition is met, determining the method for obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs; The first condition includes at least one of the following: The terminal has a cell reselection requirement; The terminal recovered from the overlay vulnerability; The terminal receives a system broadcast change instruction from the first cell; The terminal has a positioning requirement; The paging downlink control information (DCI) indicating system information of the first cell; The validity period of the SIB of the first cell stored in the terminal has expired.

3. The method according to claim 1 or 2, wherein, The method of determining the method for obtaining the SIB of the first cell based on whether the first cell periodically sends SIBs includes at least one of the following: The terminal has a cell reselection requirement and the first cell sends the SIB non-periodically, so it determines to send a first request to the first cell. The first request is used to request the SIB of the first cell. The terminal has a cell reselection requirement and the first cell sends the SIB non-periodically, so it determines to send a second request to the second cell; the second request is used to request the SIB of the first cell.

4. The method according to claim 3, wherein, The terminal has a cell reselection requirement and the first cell non-periodicly sends the SIB, sending a first request to the first cell for the first cell SIB, including at least one of the following: The terminal has a cell reselection requirement and the first cell sends the SIB non-periodically, so it is determined to send the first request to the first cell before reselecting to the first cell; The terminal has a cell reselection requirement and the first cell sends the SIB non-periodically, so it determines that after reselecting to the first cell, it will send the first request to the first cell.

5. The method according to claim 3 or 4, wherein, The terminal has a cell reselection requirement and the first cell non-periodicly sends the SIB, determining to send a first request to the first cell for the first cell SIB, including: The terminal has a cell reselection requirement and the first cell sends the SIB non-periodically, so it determines to send a random access request to the first cell; the random access request includes: a first random access preamble indicating the request SIB.

6. The method according to claim 5, wherein, The method further includes: Receive the random access response sent by the first network device in the first cell; The first network device is determined to have received the first request based on the random access response.

7. The method according to claim 5, wherein, The method further includes: Listen for SIB requests on the first cell according to the configuration of periodically sending the SIB; Whether the first network device has received the first request is determined based on whether the requested SIB is detected.

8. The method according to any one of claims 5 to 7, wherein, The method further includes: In response to determining that the first network device has not received the first request, it determines to increase the transmit power of the random access request and continues to send the random access request.

9. The method according to claim 10, wherein, The method further includes: When the transmit power of the random access request reaches the maximum transmit power and / or the number of transmissions of the first random access preamble reaches the maximum number of transmissions, it is determined to stop sending the random access request.

10. The method according to claim 3, wherein, The first request and / or the second request includes at least one of the following: The community identifier of the first community; The identification information of the requested SIB.

11. The method according to any one of claims 1 to 10, wherein, The method further includes at least one of the following: Based on the Master Information Block (MIB) of the first cell, determine whether the first cell periodically sends the SIB; Based on the cell configuration of the first cell sent by the second cell, it is determined whether the first cell periodically sends the SIB.

12. The method according to claim 11, wherein, Determining whether the first cell periodically sends the SIB based on the first cell's Master Information Block (MIB) includes at least one of the following: Whether the first cell periodically sends the SIB is determined based on whether the MIB of the first cell contains the first bit; Based on the verification method used by the MIB of the first cell, determine whether the first cell periodically sends the SIB; Based on the indication content of the second bit in the MIB of the first cell, it is determined whether the first cell periodically sends the SIB.

13. The method according to claim 12, wherein, Determining whether the first cell periodically sends the SIB based on the verification method used by the first cell's MIB includes at least one of the following: Based on the verification algorithm used by the MIB of the first cell, determine whether the first cell periodically sends the SIB; Based on the verification mask used by the MIB of the first cell, it is determined whether the first cell periodically sends the SIB.

14. The method according to claim 11, wherein, The cell configuration includes at least one of the following: The first information indicates whether the first cell periodically sends the SIB; The second piece of information indicates whether the first cell sends SIBs based on an on-demand mechanism; The third information is used by the terminal to send a first request to the first cell, and / or the third information is used by the terminal to send a second request to the second cell; the first request and / or the second request are used by the terminal to request an SIB from the first cell.

15. A method for requesting System Information Block (SIB), wherein, The method, performed by the first network device of the first cell, includes: The receiving terminal sends a first request; the first request is used by the terminal to request the System Information Block (SIB) of the first cell; Based on the first request, the SIB requested by the terminal is sent.

16. The method according to claim 15, wherein, The first request includes: a random access request; The random access request includes: a first random access preamble indicating the request SIB.

17. The method according to claim 16, wherein, The method further includes: A request response is sent to the terminal; the request response is used by the terminal to determine whether the first network device has received the first request.

18. The method according to claim 17, wherein, The request response includes: a random access response; The random access response is used to instruct the terminal that the first network device has confirmed receiving a random access request for a request SIB.

19. The method according to any one of claims 15 to 18, wherein, The first request is a request sent by the terminal before the cell is reselected to the first cell; or, the first request is a request sent by the terminal after the cell is reselected to the first cell.

20. The method according to any one of claims 15 to 19, wherein, The method further includes: The verification method of the MIB is determined based on whether the first cell periodically sends SIBs; Whether the MIB contains the first bit is determined based on whether the first cell periodically sends the SIB; The indication content of the second bit contained in the MIB is determined based on whether the first cell periodically sends an SIB.

21. The method according to claim 20, wherein, The step of determining the verification method of the MIB based on whether the first cell periodically sends SIBs includes at least one of the following: The verification algorithm for the MIB is determined based on whether the first cell periodically sends SIBs. The check mask of the MIB is determined based on whether the first cell periodically sends SIBs.

22. A method for requesting System Information Block (SIB), wherein, The method, performed by a second network device in the second cell, includes: The receiving terminal sends a second request when it has a cell reselection requirement; the second request is used by the terminal to request the first cell to send a System Information Block (SIB).

23. The method according to claim 22, wherein, The method further includes: The second request is sent to the first network device of the first cell.

24. A method for requesting System Information Block (SIB), wherein, The method, performed by a second network device in the second cell, includes: The cell configuration of the first cell is sent to the terminal; the cell configuration is used by the terminal to determine whether the first cell periodically sends SIBs.

25. The method according to claim 24, wherein, The cell configuration includes at least one of the following: The first information indicates whether the first cell periodically sends the SIB; The second piece of information indicates whether the first cell sends SIBs based on an on-demand mechanism; The third information is used by the terminal to send a first request to the first cell, and / or the third information is used by the terminal to send a second request to the second cell; the first request and / or the second request are used by the terminal to request an SIB from the first cell.

26. A terminal, wherein, include: The processing module is configured to determine the method for obtaining the SIB of the first cell based on whether the first cell periodically sends the SIB.

27. A first network device performs the method comprising: The receiving module is configured to receive the first request sent by the terminal; The first request is used by the terminal to request the System Information Block (SIB) of the first cell; The sending module is configured to send the SIB requested by the terminal in accordance with the first request.

28. A second network device, wherein, include: The receiving module is configured to receive a second request sent by the terminal when it has a cell reselection requirement; The second request is used by the terminal to request the first cell to send a System Information Block (SIB).

29. A second network device, wherein, include: The sending module is configured to send the cell configuration of the first cell to the terminal; The cell configuration is at least used by the terminal to determine whether the first cell periodically sends SIBs.

30. A communication device, wherein, The communication device includes: One or more processors; The processor is configured to invoke instructions to cause the communication device to execute the request method for the Information System Block (SIB) according to any one of claims 1 to 14, 15 to 21, 22 to 23 and / or claims 24 to 25.

31. A storage medium, wherein, The storage medium stores instructions that, when executed on a communication device, cause the communication device to perform the request method for the Information System Block (SIB) according to any one of claims 1 to 14, 15 to 21, 22 to 23 and / or claims 24 to 25.

Images