Method performed by a user equipment and user equipment

Abstract

The application provides a method executed by a user equipment and the user equipment. A method executed by a user equipment (UE) comprises: the UE receiving a system information block (SIB1) sent by a network; and the UE determining how to acquire a system information block (SIB(s)) of other required system information according to a first condition and a second condition, and executing a corresponding process, wherein the UE judges whether the second condition is met, and the second condition comprises at least one of the following: the UE is a SIB1 on-demand sending UE; the cell is a SIB1 on-demand sending cell; the saved SIB1 is acquired in a current modification period; and a SIB1 search space is configured on an activated partial bandwidth (BWP), and in the case that the second condition is met, the UE determines the operation corresponding to the acquisition of the required system information block according to a system information broadcast state.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and more specifically, to a method for network power saving performed by a user equipment and a corresponding user equipment. Background Technology

[0002] Network energy conservation helps reduce environmental impact and save operator costs. Networks typically require random access resources to enable terminal access. Under low system load, a large or dense allocation of random resources can waste network resources. Networks can be configured with sparser random access resources and dynamically adjusted to adapt to changes in system load. For these reasons, the 3rd Generation Partnership Project (3GPP) approved the NES enhancement work item for version 19 at the RAN plenary meeting, the details of which can be found in non-patent literature: RP-242354 WID: Enhancements of network energy savings for NR. This work item includes the network ceasing periodic broadcasting of SIB1 under low system load conditions, allowing UEs to request SIB1 on demand, and triggering SIB1 broadcasting based on UE requests. Summary of the Invention

[0003] According to one aspect of the present invention, a method executed by a user equipment (UE) is provided, comprising: the UE receiving a system information block (SIB1) sent by a network; and the UE determining how to obtain other required system information blocks (SIBs) based on a first condition and a second condition, and executing a corresponding process, wherein the UE determines whether the second condition is satisfied, the second condition including at least one of the following: the UE is an on-demand SIB1 UE; the cell is an on-demand SIB1 cell; the stored SIB1 was obtained in the current modification period; and an SIB1 search space is configured on an active partial bandwidth (BWP). If the second condition is satisfied, the UE determines the operation corresponding to obtaining the required system information block based on the system information broadcast status.

[0004] In the above method, preferably, the UE determines whether the first condition is met before determining the second condition, and if the first condition is met, determines whether the second condition is met. The first condition includes at least one of the following: the UE is in the Radio Resource Control (RRC)_CONNECTED state; the T311 timer is not running; other system information search spaces are configured on an active BWP; and the UE has not yet saved a valid version of the required system information block.

[0005] In the above method, preferably, if the second condition is not met, the UE requests the required system information block from the network, that is, it initiates a transmission proprietary SIB request message to obtain the system information SI message.

[0006] In the above method, preferably, the SIB1 search space configured on the activated BWP is included in the SIB1, and the system information broadcast status is included in the SIB1.

[0007] In the above method, preferably, the operation of the UE determining the required SIB(s) based on the system information broadcast state includes: if the SI message contains at least one required SIB(s) and the system information broadcast state corresponding to the SI message is set to broadcast, then the UE obtains the SI message; if the SI message contains at least one required SIB(s) and the system information broadcast state corresponding to the SI message is set to non-broadcast, then the UE requests the required SIB(s) from the network, that is, initiates a transmission dedicated SIB request message to obtain the SI message.

[0008] In the above method, preferably, when the UE receives a system information change indication sent by the network, if the UE in the RRC_CONNECTED state has an active BWP with an configured SIB1 search space and paging search space, and has already received the system information change indication, then the UE determines whether the second condition is met. If the second condition is met, the UE reacquires SIB1. If the second condition is not met, if the synchronization signal / physical broadcast channel block SSB subcarrier offset indication SIB1 in the main information block MIB is transmitted or scheduled in the cell, then the UE reacquires SIB1.

[0009] In the above method, preferably, the UE determines whether the second condition is met. If the second condition is met, and if the UE in the RRC_CONNECTED state has an active BWP with an configured SIB1 search space and paging search space, and has received a system information change indication, then the UE reacquires SIB1. If the second condition is not met, and if the SSB subcarrier offset indication in the MIB indicates that SIB1 is transmitted or scheduled in the cell, then the UE reacquires SIB1.

[0010] According to another aspect of the present invention, a user equipment is provided, comprising: a processor; and a memory storing instructions, wherein the instructions, when executed by the processor, perform the method described in any of the preceding aspects.

[0011] Invention Effects

[0012] According to the present invention, the UE can be informed of changes in cell type in a timely manner, correctly obtain SIB1 and OSI, and at the same time reduce the UE's signaling overhead. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of method one executed by the UE according to one or more embodiments.

[0014] Figure 2 This is a schematic diagram of method two executed by the UE according to one or more embodiments.

[0015] Figure 3 This is a simplified structural block diagram of the user equipment (UE) involved in the present invention. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below. Furthermore, for the sake of simplicity, detailed descriptions of well-known technologies not directly related to the present invention have been omitted to prevent confusion in understanding the present invention.

[0017] The following describes some of the terms involved in this invention. For the specific meanings of these terms, please refer to the latest 3GPP standard specifications.

[0018] UE: User Equipment

[0019] gNB: the next generation Node B, next-generation base station

[0020] RAN: Radio Access Network, Wireless Access Layer

[0021] CN: Core Network

[0022] NR: New Radio, next-generation wireless technology

[0023] PLMN: Public Land Mobile Network

[0024] AS: Access Stratum

[0025] L3: Layer 3

[0026] MAC: Medium Access Control

[0027] CE: control element, control unit

[0028] RRC: Radio Resource Control

[0029] RRC_CONNECTED: RRC connection state

[0030] RRC_INACTIVE: RRC inactive state

[0031] RRC_IDLE: RRC idle state

[0032] PDCCH: Physical downlink control channel

[0033] PUCCH: Physical Uplink Control Channel

[0034] PUSCH: Physical Uplink Shared Channel

[0035] PRACH: Physical Random Access Channel

[0036] PBCH: Physical broadcast channel

[0037] SFN: System Frame Number

[0038] PDU: Protocol Data Unit

[0039] SSB: SS / PBCH block, Synchronization Signal / Physical Broadcast Channel Block

[0040] CSI-RS: Channel Status Information-Reference Signal

[0041] BWP: Bandwidth part, partial bandwidth

[0042] DCI: Downlink Control Information

[0043] RNTI: Radio Network Temporary Identifier

[0044] C-RNTI: Cell RNTI, Cell RNTI

[0045] P-RNTI: Paging RNTI, Pager RNTI

[0046] RA-RNTI: Random Access RNTI

[0047] SI-RNTI: System Information RNTI

[0048] RSRP: Reference Signal Received Power

[0049] RSRQ: Reference Signal Received Quality

[0050] SpCell: Special Cell, including PCCell and PSCell.

[0051] SCell: Secondary Cell

[0052] PCell: Primary Cell

[0053] PSCell: Primary SCG Cell (SCG Main Cell)

[0054] CA: Carrier Aggregation

[0055] DC: Dual Connectivity

[0056] MCG: Master Cell Group

[0057] SCG: Secondary Cell Group

[0058] MIB: Master Information Block

[0059] SIB: System Information Block

[0060] SI: System Information

[0061] OSI: Other System Information

[0062] RLF: Radio Link Failure.

[0063] NES: Network Energy Saving

[0064] RAPID: Random Access Preamble Identifier

[0065] RAR: Random Access Response

[0066] WUS: wake up signal

[0067] OD: on-demand, sending on demand.

[0068] UL: uplink

[0069] In this invention, the network (or NW), base station (or gNB or eNB), and RAN can be used interchangeably. The network can be a Long Term Evolution (LTE) network, a New Radio Access Technology (NR) network, an enhanced Long Term Evolution (eLTE) network, or other networks defined in subsequent 3GPP evolution versions.

[0070] In this invention, User Equipment (UE) can refer to a device that supports network power saving, a device that supports enhanced network power saving, a device that supports on-demand SIB1, or other types of NR or LTE devices.

[0071] In this invention, "message" and "signaling" can be used interchangeably.

[0072] In this invention, the terms "feedback", "submit", "report", "send", "transmit or transport", "inform or notify", "indicate", and "provide" can be used interchangeably.

[0073] In this invention, terms such as "use", "be available / be valid", "apply", "implement", "enable", "activate", "perform", "do", and "start" can be used interchangeably.

[0074] In this invention, "trigger" and "initiate" can be used interchangeably.

[0075] In this invention, "deactivate (non-active or deactivate / deactivate)," "stop / stop," "de-enable," "exit," "invalidate," and "make unavailable / unusable" can be used interchangeably.

[0076] In this invention, "activate", "start", "enable", "use", "enter", and "wake up" can be used interchangeably.

[0077] In this invention, "activated", "available", "valid" and "available" can be used interchangeably.

[0078] In this invention, "deactivated", "unavailable", "inactive", "invalid", and "unavailable" can be used interchangeably.

[0079] In this invention, the terms "associate", "correspond", and "map" can be used interchangeably.

[0080] In this invention, receiving, detecting, monitoring, acquiring, and deriving are interchangeable.

[0081] In this invention, "time" can be time, duration, period, time period, etc.

[0082] In this invention, "physical layer" and "layer one (L1)" can be used interchangeably. "MAC layer" and "MAC entity" can also be used interchangeably. For the RRC layer, "upper layer(s)" refers to layers above the RRC layer, such as the NAS layer. For the MAC layer, "upper layer(s)" refers to layers above the MAC layer, such as the RRC layer, and "lower layer(s)" refers to layers below the MAC layer, such as the physical layer. For the physical layer, "upper layer" refers to layers above the physical layer, such as the MAC layer and / or the RRC layer.

[0083] In this invention, "not broadcasting" and "on-demand" can be used interchangeably; "broadcasting" and "not on-demand" can also be used interchangeably.

[0084] In this invention, “SIB1 request configuration”, “UL WUS configuration”, “PRACH configuration for on-demand SIB1 request” and “PRACH configuration for SIB1 request” can be used interchangeably.

[0085] In this invention, “OD-SIB1”, “NES” and “on-demand SIB1” can be used interchangeably.

[0086] In this invention, "PRACH", "RACH" and "random access" can be used interchangeably.

[0087] In this invention, “random access parameters (configuration)”, “random access resources (parameters / configuration)”, and “random access resource set (configuration)” can be used interchangeably.

[0088] In this invention, "change", "modify", "update" and "modify" can be used interchangeably.

[0089] In this invention, "System Information Change Instruction" and "Short Message" can be used interchangeably.

[0090] It should be noted that in this specification, the two terms connected by "and", "or", or "and / or" may represent different ways of expressing the same meaning in different application scenarios. There may be a relationship of inclusion between the two terms, and they do not necessarily refer to completely different content.

[0091] The related technologies of the present invention are described below.

[0092] System Information

[0093] In NR, System Information (SI) includes MIB and several SIB(s). SI is divided into Minimum SI and Other SI. Minimum SI includes MIB and SIB1, and SIB(s) other than Minimum SI are called Other SI. Other SI is abbreviated as OSI.

[0094] In NR networks, MIB and SIB1 are important system information. In order for a UE to camp on a certain cell or initiate an RRC connection in a certain cell, it needs to obtain MIB and SIB1 first, thereby obtaining the basic network parameter information for camping on or accessing that cell.

[0095] The MIB is broadcast on the PBCH, and SIB1 is broadcast on the PDSCH. To receive SIB1, the UE needs to listen to the PDCCH to obtain the scheduling information of the PDSCH carrying SIB1. The UE then obtains SIB1 from the PDSCH based on the scheduling information. The MIB contains relevant parameter information for obtaining SIB1. The MIB includes an ssb-SubcarrierOffset field, which indicates whether the cell's SIB1 is scheduled (or transmitted). This field contains 4 bits, and the specific value (or range) of one (or more) of these 4 bits indicates whether the cell's SIB1 is scheduled (or transmitted). If the cell's SIB1 is not scheduled (or transmitted), the UE considers important system information missing, the cell is barred, and cell reselection is performed; if the cell's SIB1 is scheduled (or transmitted), the UE obtains SIB1.

[0096] SIB1 contains parameter information for retrieving other SIBs (i.e., OSIs) besides MIB and SIB1, such as period, SI window length, and whether the OSI(s) is broadcast. SIB(s) with the same period can be mapped to the same SI message.

[0097] System information changes

[0098] System information change instructions are transmitted using Short Message, which is a DCI format with P-RNTI.

[0099] System information changes are implemented using a modification cycle, the boundary of which is determined by the SFN value. m represents the number of radio frames included in the modification cycle, and the boundary of the modification cycle is the SFN value that satisfies SFN mod m = 0. When system information changes, the network sends a system information change indication. The network then broadcasts the updated system information in the next modification cycle immediately following the one that sent the system information change indication.

[0100] In RRC_IDLE or RRC_INACTIVE state, the UE listens for system information change indications at its own paging time. In RRC_CONNECTED state, if the UE is provided with an active common search space on the BWP (including the paging search space, SIB1 search space, and other system information search spaces), the UE listens for system information change indications at least once at any paging time in each modification cycle. After receiving a system information change indication, the UE executes the system information acquisition procedure at the beginning of the next modification cycle.

[0101] On-demand OSI

[0102] For SIB(s) belonging to the OSI model, the network may not broadcast them periodically, but rather transmit them only after a UE requests them. If the SIB(s) required by the UE is broadcast, the UE obtains the SIB(s) according to the period and scheduling information of the SIB(s); if the SIB(s) is non-broadcast, the UE requests the required system information from the network, triggering the network to transmit the SIB(s).

[0103] In the RRC_IDLE and RRC_INACTIVE states, the specific method for the UE to request system information from the network includes: the UE sends a PRACH to the network through the OSI request configuration (including proprietary PRACH resources) to request the SIB(s); after receiving the request, the network sends a response to the UE; and the UE obtains the required SIB(s) according to the window length of the SI.

[0104] In the RRC_CONNECTED state, the UE needs to reacquire the latest SIB1 before acquiring the OSI-related SIB(s). The cell periodically broadcasts SIB1, and the UE acquires SIB1 based on the SIB1 broadcast period and scheduling information. Based on the SI broadcast status contained in the acquired SIB1, the UE determines how to acquire the SIB(s). If the SI broadcast status corresponding to the SIB(s) required by the UE is set to broadcasting, the UE directly acquires the required SIB(s), i.e., it receives the SI message by listening to the PDCCH in the OSI common search space to obtain the time-frequency position of the SI message broadcast on the PDSCH; if the SI broadcast status corresponding to the SIB(s) required by the UE is set to not broadcasting, the UE transmits a DedicatedSIBRequest message to the network to request the SIB(s), and the network sends the requested SIB(s) through a dedicated RRC message (e.g., RRCReconfiguration).

[0105] On-demand SIB1

[0106] A cell is called an OD-SIB1 cell if it employs / supports (enhanced) network power saving, or if its SIB1 is transmitted on demand rather than broadcast, or if it transmits SIB1 in response to a UL WUS sent by a UE, or if it employs / supports on-demand SIB1. In this invention, OD-SIB1 cell is merely an example name and could be other names. In an OD-SIB1 cell, SIB1 is not periodically broadcast but transmitted only after a UE request, for example, transmitted over a period of time.

[0107] For on-demand SIB1, the SIB1 request configuration used to request SIB1 in an OD-SIB1 cell can be sent to the UE by other cells (e.g., neighboring cells of the OD-SIB1 cell), or the already obtained SIB1 request configuration can be updated through the system information update procedure. If a cell's own SIB1 is broadcast, and that cell can send the SIB1 request configuration of other cells (or neighboring cells) to other cells (or neighboring cells), then that cell is called Cell A. In this invention, Cell A is just an example name, and it can also be other names.

[0108] The SIB1 request configuration for requesting SIB1 (or OD-SIB1) in the OD-SIB1 cell may include a PRACH configuration for the SIB1 request, which may include, but is not limited to, a PRACH preamble(s) for the SIB1 request, PRACH resources(s) for the SIB1 request, etc. When the UE is camped in Cell A, the UE can receive the SIB1 request configuration for the OD-SIB1 cell from the system information receiving network of Cell A. When the UE reselects from Cell A to the OD-SIB1 cell, the UE initiates a random access procedure in the OD-SIB1 cell to request SIB1 using the aforementioned SIB1 request configuration. Upon receiving confirmation of the SIB1 request (i.e., receiving the RAR), the UE acquires SIB1 in the OD-SIB1 cell. Alternatively, when the UE is camped in the first OD-SIB1 cell, the UE can receive the SIB1 request configuration for the second OD-SIB1 cell from the system information receiving network of the first OD-SIB1 cell. When the UE reselects from the first OD-SIB1 cell to the second OD-SIB1 cell, the UE uses the SIB1 request configuration to initiate a random access procedure in the second OD-SIB1 cell to request SIB1. Upon receiving confirmation of the SIB1 request, the UE acquires SIB1 in the second OD-SIB1 cell.

[0109] In version 19, UEs in the RRC_IDLE and / or RRC_INACTIVE states can perform the on-demand SIB1 request process as described above. UEs in the RRC_CONNECTED state can only request on-demand SIB1 in the OD-SIB1 cell during an RRC re-establishment process triggered by a radio link failure, in the same manner as RRC_IDLE / RRC_INACTIVE. UEs in the RRC_CONNECTED state cannot request on-demand SIB1 in the OD-SIB1 cell under other circumstances. Furthermore, because the OD-SIB1 cell does not periodically broadcast SIB1, RRC_CONNECTED UEs cannot obtain the latest SIB1 when they need to obtain OSI, and therefore cannot determine which method to use to obtain OSI.

[0110] To address at least some of the aforementioned problems, the present invention provides a method and a user equipment (UE) that are executed by a user equipment, enabling the UE to promptly learn of changes in cell type, correctly acquire SIB1 and OSI, and simultaneously reduce the UE's signaling overhead.

[0111] Example

[0112] To distinguish it from ordinary UEs, this invention refers to a UE having at least one of the following characteristics as an OD-SIB1 UE. OD-SIB1 UE is merely an example name, and any other UE having at least one of the following characteristics can be used interchangeably with OD-SIB1 UE:

[0113] - Features enhanced network energy-saving capabilities;

[0114] -Supports on-demand SIB1;

[0115] -Supports on-demand SIB1 retrieval / request (process);

[0116] -Supports obtaining on-demand SIB1 via UL WUS;

[0117] - Has on-demand SIB1 (request) capability;

[0118] - Has SIB1 request capability;

[0119] -Supports obtaining SIB1 by requesting SIB1;

[0120] - Save (or have) a valid UL WUS configuration.

[0121] Optionally, the UE in this invention is an OD-SIB1 UE.

[0122] Figure 1 This is a schematic diagram illustrating method one executed by the UE according to one or more embodiments. The UE can execute... Figure 1 One or more steps. Figure 1 This includes steps S101 to S102.

[0123] Optionally, in step S101, the UE receives SIB1 sent by the network. Optionally, the UE saves the SIB1. Optionally, the SIB1 includes at least one of the following configurations:

[0124] -System information scheduling information (si-SchedulingInfo);

[0125] -SIB1 search space (searchSpaceSIB1);

[0126] -Other System Information search space

[0127] - Paging Search Space.

[0128] Optionally, searchSpaceSIB1, searchSpaceOtherSystemInformation, and pagingSearchSpace are all public search spaces, and each of them is configured for a BWP. Optionally, one or more BWP configurations are contained in SIB1. Optionally, each cell can have at most one active BWP.

[0129] Optionally, si-SchedulingInfo contains a scheduling information list (schedulingInfoList), which is a list of SI message scheduling information.

[0130] Optionally, each SI scheduling information in schedulingInfoList includes a system information broadcast status (si-BroadcastStatus). Optionally, si-BroadcastStatus is used to indicate whether the corresponding SI message is being broadcast. si-BroadcastStatus set to broadcasting indicates that the corresponding SI is being broadcast, and si-BroadcastStatus set to notBroadcasting indicates that the corresponding SI is not being broadcast.

[0131] Optionally, in step S102, the UE needs to obtain the OSI SIB(s). Based on the first condition and the second condition, the UE determines how to obtain the required OSI SIB(s) and executes the corresponding process.

[0132] Optionally, the UE determines a first condition, which includes at least one of the following conditions:

[0133] -UE is in RRC_CONNECTED state;

[0134] -T311 is not running;

[0135] - The BWP is active and has searchSpaceOtherSystemInformation configured.

[0136] - The UE has not yet saved a valid version of the required SIB(s).

[0137] Optionally, if the first condition is met, the UE determines the second condition, which includes at least one of the following (another implementation is that the UE does not determine the first condition but directly determines the second condition):

[0138] -UE is OD-SIB1 UE;

[0139] -The cell is an OD-SIB1 cell;

[0140] - The saved SIB1 (or the SIB1 that has been obtained) was acquired in the current modification cycle;

[0141] - There is a BWP with searchSpaceSIB1 configured.

[0142] Optionally, in this invention, "the cell is an OD-SIB1 cell" can also be expressed as: the SIB1 of the cell is transmitted on demand, or the SIB1 of the cell is not periodically broadcast, or the cell transmits SIB1 on demand; "the cell is not an OD-SIB1 cell" can also be expressed as: the SIB1 of the cell is periodically broadcast, or the SIB1 of the cell is not transmitted on demand, or the cell periodically broadcasts SIB1.

[0143] Optionally, the UE determines whether the cell is an OD-SIB1 cell based on the ssb-SubcarrierOffset field (SSB) included in the MIB. This field, containing 4 bits, indicates whether the SIB1 of the cell is scheduled (or transmitted). If the ssb-SubcarrierOffset value is a first value or a first range of values, it indicates that the SIB1 of the cell is scheduled (or transmitted). If the ssb-SubcarrierOffset value is a second value or a second range of values, it indicates that the SIB1 of the cell is not scheduled (or transmitted). If the SIB1 of the cell is not scheduled (or transmitted), the UE considers the cell to be an OD-SIB1 cell; or if the SIB1 of the cell is not scheduled (or transmitted) and the UE has a valid UL WUS configuration (for the cell), the UE considers the cell to be an OD-SIB1 cell. Alternatively, if ssb-SubcarrierOffset is a third value or a third value range, it indicates that the cell's SIB1 is transmitted on demand, meaning the UE considers the cell to be an OD-SIB1 cell. Alternatively, if ssb-SubcarrierOffset is any other value or any other value range, it indicates that the cell does not have SIB1 or does not provide SIB1 transmission. The UE considers important system information missing, the cell is barred, and cell reselection is performed.

[0144] Optionally, if the second condition is met, the UE determines the system information broadcast state and determines the operation corresponding to the required SIB(s) based on the different values ​​of the system information broadcast state.

[0145] Optionally, if the second condition is not met (if the judgment of the first condition is executed after the judgment of the second condition, then if the first condition is not met), the UE requests the required SIB(s) from the network, that is, initiates the transmission of a DedicatedSIBRequest message to obtain the SI message, or obtains the SIB(s) required by the UE.

[0146] Another implementation is as follows: The UE first judges the second condition. If the second condition is met, the UE judges the first condition. If the first condition is met, the UE judges the system information broadcast state. Based on the different values ​​of the system information broadcast state, the UE determines the operation corresponding to the required SIB(s).

[0147] Optionally, if (based on the SI scheduling information in SIB1) the SI message contains at least one required SIB, and the si-BroadcastStatus corresponding to the SI message is set to broadcasting, then the SI message is acquired, i.e., the PDCCH time at which the SI message is listened for is determined according to searchSpaceOtherSystemInformation. Optionally, if (based on the SI scheduling information in SIB1) the SI message contains at least one required SIB, and the si-BroadcastStatus corresponding to the SI message is set to notBroadcasting, then the UE requests the required SIB(s) from the network, i.e., initiates the transmission of a DedicatedSIBRequest message to acquire the SI message.

[0148] Optionally, the failure to meet the second condition can also be described as: the UE is not an OD-SIB1 UE, and / or the cell is not an OD-SIB1 cell, and / or the saved SIB1 was not obtained in the current modification period.

[0149] Optionally, the T311 timer starts when the UE initiates the RRC reconstruction procedure and stops when a suitable NR cell is selected.

[0150] Figure 2 This is a schematic diagram illustrating method two executed by the UE according to one or more embodiments. The UE can execute... Figure 2 One or more steps. Figure 2 This includes steps S201 to S204.

[0151] Optionally, step S201 is the same as step S101. The difference from step S101 is that for OD-SIB1 cell, the change of si-BroadcastStatus causes a change in the system information in the Short Message; in other words, except for OD-SIB1 cell, the change of si-BroadcastStatus does not cause a change in the system information in the Short Message.

[0152] Optionally, in step S202, the UE receives a system information change indication sent by the network, the indication being contained in a Short Message.

[0153] Optionally, in step S203, the UE acquires the MIB or reacquires the MIB.

[0154] Optionally, the UE acquires (or reacquires) the MIB if at least one of the following conditions is met:

[0155] -Second condition;

[0156] - The UE is in the RRC_CONNECTED state;

[0157] -T311 is not running;

[0158] - The BWP is active and has searchSpaceSIB1 and pagingSearchSpace configured.

[0159] -We have received a system information change instruction.

[0160] Optionally, in step S204, the UE acquires SIB1 or reacquires SIB1.

[0161] Optionally, if a UE in the RRC_CONNECTED state has searchSpaceSIB1 and pagingSearchSpace configured on an active BWP and has received a system information change indication, the UE determines the second condition. Optionally, if the second condition is met, the UE acquires (or reacquires) SIB1, i.e., acquires SIB1 according to the schedule. Optionally, if the second condition is not met, if the SSB-SubcarrierOffset in the MIB indicates that SIB1 is transmitted (or scheduled) in the cell, the UE acquires SIB1, i.e., acquires SIB1 according to the schedule.

[0162] Optionally, another implementation is as follows: The UE determines the second condition. If the second condition is met, and the UE in the RRC_CONNECTED state has searchSpaceSIB1 and pagingSearchSpace configured on an active BWP, and has received a system information change indication, then the UE acquires (or reacquires) SIB1, i.e., acquires SIB1 according to the schedule. Optionally, if the second condition is not met, if the SSB-SubcarrierOffset in the MIB indicates that SIB1 is transmitted (or scheduled) in the cell, then the UE acquires SIB1, i.e., acquires SIB1 according to the schedule.

[0163] In this method, the second condition is the same as the second condition in step S102.

[0164] Method 3, which is performed by the UE according to one or more embodiments, is described below.

[0165] Optionally, the UE receives the first indication sent by the network. Optionally, the UE is in the RRC_CONNECTED state.

[0166] Optionally, the first indication is contained in a DCI (e.g., a Short Message), a MAC CE, or an RRC message.

[0167] Optionally, the first indication is used to indicate at least one of the following information:

[0168] - The cell was changed from an OD-SIB1 cell to a non-OD-SIB1 cell;

[0169] - The cell changed from sending SIB1 on demand to periodically broadcasting SIB1;

[0170] - The SIB1 of the cell changed from on-demand transmission to periodic broadcast.

[0171] The cell in question refers to the current cell or the currently serving cell. A “non-OD-SIB1” cell refers to a regular cell, or Cell A, or a cell that periodically broadcasts SIB1.

[0172] Optionally, if the UE receives the first indication, the UE considers the cell not to be an OD-SIB1 cell, or the UE considers the cell to be a normal cell.

[0173] Alternatively, the first indication may also be used to indicate at least one of the following information:

[0174] - The cell was changed from a non-OD-SIB1 cell to an OD-SIB1 cell;

[0175] - The cell changed from periodically broadcasting SIB1 to sending SIB1 on demand;

[0176] - The SIB1 of the cell changed from periodic broadcasting to on-demand transmission.

[0177] Optionally, if the first indication indicates that the cell changes from an OD-SIB1 cell to a non-OD-SIB1 cell, or the cell changes from on-demand SIB1 transmission to periodic broadcast SIB1, or the cell's SIB1 transmission changes from on-demand to periodic broadcast (optionally, the UE is in the RRC_CONNECTED state), then the UE performs at least one of the following operations:

[0178] - It is assumed that the cell is not an OD-SIB1 cell;

[0179] - Obtain SIB1 and / or the required OSI SIB(s) according to the original process;

[0180] - Obtain SIB1 and / or the required OSI SIB(s) based on the scheduling information (or searchSpaceSIB1 and / or searchSpaceOtherSystemInformation).

[0181] Optionally, if the first indication indicates that the cell changes from a non-OD-SIB1 cell to an OD-SIB1 cell, or the cell changes from periodically broadcast SIB1 to on-demand SIB1, or the cell's SIB1 changes from periodically broadcast to on-demand (optionally, the UE is in the RRC_CONNECTED state), then the UE performs at least one of the following operations:

[0182] - The cell is considered to be an OD-SIB1 cell;

[0183] - Obtain SIB1 and / or the required OSI SIB(s) from RRC proprietary messages;

[0184] - Obtain SIB1 and / or the required OSI SIB(s) according to the corresponding OD-SIB1 procedure;

[0185] - When OSI SIB(s) are needed, initiate the transmission of the DedicatedSIBRequest message.

[0186] Method 4, which is performed by the UE according to one or more embodiments, is described below.

[0187] Optionally, the UE receives a second SIB. Optionally, the second SIB includes a UL WUS configuration. Optionally, the UL WUS configuration is used by the UE to request SIB1.

[0188] Optionally, if the second SIB indicates the release of the UL WUS configuration (or the UL WUS configuration is set to release), and / or the current cell is an OD-SIB1 cell, then the UE considers the cell not to be an OD-SIB1 cell.

[0189] Method 5, which is performed by the UE according to one or more embodiments, is described below.

[0190] Optionally, the UE receives SIB1 sent by the network. Optionally, the SIB1 includes the SIB1 search space (searchSpaceSIB1) and / or other system information search space (searchSpaceOtherSystemInformation).

[0191] Optionally, both searchSpaceSIB1 and searchSpaceOtherSystemInformation are public search spaces, and both searchSpaceSIB1 and searchSpaceOtherSystemInformation are configured for BWP.

[0192] Optionally, for OD-SIB1 cells, if BWP's searchSpaceSIB1 does not exist, then searchSpaceOtherSystemInformation does not exist.

[0193] Figure 3 This is a simplified structural block diagram of the user equipment (UE) involved in this invention. Figure 3 As shown, the user equipment UE300 includes a processor 301 and a memory 302. The processor 301 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 302 may include, for example, volatile memory (such as random access memory, RAM), a hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory. Program instructions are stored on the memory 302. When executed by the processor 301, these instructions can perform the methods described in detail herein, executed by the user equipment.

[0194] The program running on the device according to the invention can be a program that enables the computer to perform the functions of embodiments of the invention by controlling the central processing unit (CPU). The program or the information processed by the program can be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.

[0195] Programs used to implement the functions of the various embodiments of the present invention can be recorded on a computer-readable recording medium. The corresponding functions can be implemented by causing a computer system to read and execute the programs recorded on the recording medium. The term "computer system" here can refer to a computer system embedded in the device, and may include an operating system or hardware (such as peripheral devices). "Computer-readable recording medium" can be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a short-time dynamic storage program recording medium, or any other computer-readable recording medium.

[0196] Various features or functional modules of the devices used in the above embodiments can be implemented or executed by circuits (e.g., monolithic or multi-chip integrated circuits). Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above devices. A general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above circuits may be digital circuits or analog circuits. In cases where advancements in semiconductor technology have led to new integrated circuit technologies that replace existing integrated circuits, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.

[0197] Furthermore, the present invention is not limited to the embodiments described above. Although various examples of the embodiments have been described, the present invention is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors can be used as terminal devices or communication devices, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

[0198] As described above, embodiments of the present invention have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above embodiments, and the present invention also includes any design modifications that do not depart from the spirit of the invention. Furthermore, various modifications can be made to the present invention within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included within the technical scope of the present invention. In addition, components with the same effects described in the above embodiments can be substituted for each other.

Claims

1. A method executed by a user equipment (UE), comprising: The UE receives system information block SIB1 sent by the network; and The UE determines how to obtain the System Information Block (SIB(s)) for other necessary system information based on the first and second conditions, and executes the corresponding procedures. The UE determines whether the second condition is met, and the second condition includes at least one of the following: The UE is an on-demand SIB1 UE; The cell is a SIB1 cell that transmits on demand; The saved SIB1 was acquired in the current modification cycle; and The active portion of the bandwidth on the BWP is configured with an SIB1 search space. If the second condition is met, the UE determines the operation corresponding to the required system information block based on the system information broadcast status.

2. The method according to claim 1, wherein, Before determining the second condition, the UE determines whether the first condition is met, and if the first condition is met, it determines whether the second condition is met. The first condition includes at least one of the following: The UE is in the Radio Resource Control (RRC)_CONNECTED state. Timer T311 is not running; Other system information search spaces are configured on the activated BWP; The UE has not yet saved a valid version of the required system information block.

3. The method according to claim 1 or 2, wherein, If the second condition is not met, the UE requests the required system information block from the network, that is, it initiates a transmission proprietary SIB request message to obtain the system information SI message.

4. The method according to claim 1 or 2, wherein, The SIB1 search space configured on the activated BWP is contained within SIB1, and The system information broadcast status is included in SIB1.

5. The method according to claim 1 or 2, wherein, The UE determines the operation corresponding to obtaining the required SIB(s) based on the system information broadcast state, including: if the SI message contains at least one required SIB(s) and the system information broadcast state corresponding to the SI message is set to broadcast, then the UE obtains the SI message; if the SI message contains at least one required SIB(s) and the system information broadcast state corresponding to the SI message is set to non-broadcast, then the UE requests the required SIB(s) from the network, that is, initiates a transmission dedicated SIB request message to obtain the SI message.

6. The method according to claim 1, wherein, If the UE receives a system information change indication from the network, and if the UE in the RRC_CONNECTED state has an active BWP configured with an SIB1 search space and a paging search space, and has already received the system information change indication, then the UE determines whether the second condition is met. If the second condition is met, the UE reacquires SIB1. If the second condition is not met, and the Synchronization Signal / Physical Broadcast Channel Block SSB Subcarrier Offset Indicator SIB1 in the Master Information Block (MIB) is transmitted or scheduled in the cell, then the UE reacquires SIB1.

7. The method according to claim 1, wherein, The UE determines whether the second condition is met. If, under the condition of the second condition, the UE in the RRC_CONNECTED state has an active BWP configured with SIB1 search space and paging search space, and has received a system information change indication, then the UE reacquires SIB1. If the second condition is not met, and the SSB subcarrier offset indication in the MIB indicates that SIB1 is transmitted or scheduled in the cell, then the UE reacquires SIB1.

8. A user equipment, comprising: processor; as well as Memory, which stores instructions The instructions, when executed by the processor, perform the method of any one of claims 1 to 7.

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