Method executed by user equipment and user equipment

Abstract

The invention provides a method executed by user equipment and the user equipment. The method comprises the following steps: aiming at a PDSCH (Physical Downlink Shared Channel) used for MBS (Multimedia Broadcasting System) broadcast, acquiring an RNTI (Radio Network Temporary Identity) used for scheduling DCI (Downlink Control Information) scrambling CRC (Cyclic Redundancy Check) of the PDSCH from a network, an SCS (Service Control System) used for transmitting the PDSCH and a repetition coefficient And according to the obtained RNTI, the SCS and the repetition coefficient, determining the maximum number of PRBs (Physical Resource Blocks) of a PDSCH (Physical Downlink Shared Channel) which can be processed.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a method for determining downlink frequency domain resources executed by a user equipment and a corresponding user equipment. Background Art

[0002] This section introduces various aspects that may help to better understand the present invention. Therefore, the statements in this section should be read from this perspective and should not be understood as an admission of what is or is not prior art.

[0003] Several typical applications are defined in the 5G system. For example, industrial wireless sensor applications are committed to accelerating industrial transformation and digitalization to gain flexibility in industrial production processes, improve productivity and efficiency, and help reduce maintenance and improve operational safety. Video surveillance equipment is used in smart city construction to help achieve better urban management and services. Wearable devices can be used for intelligent services in many aspects such as medical care and life. The devices for these applications all expect lower complexity and less power consumption to reduce costs and expand the scope of application. Release 17 supports reducing the maximum bandwidth of some device types from 100MHz to 20MHz, thereby reducing device cost and complexity. To further reduce the complexity of user equipment, some new methods can be adopted, for example, reducing the maximum bandwidth of user equipment from 20MHz to 5MHz. These methods or their combination can further reduce the complexity of equipment and reduce costs in different aspects. At the same time, considering the need to ensure the coexistence of these devices with other types of NR user equipment in the same cell to maintain the integrity of the ecosystem, maximize the scale of the ecosystem, and improve network benefits, these new business requirements raise some new issues for the existing NR network. For example, when using a common channel to transmit data to all users in a cell or a user group including several users, the receiving capabilities of different user devices need to be considered to ensure correct reception by the users and improve system efficiency. The related methods of the present invention provide a better method for implementing these devices in the network, and can ensure coexistence with existing devices in the network when relevant constraints are met, thereby obtaining better network utilization efficiency. Summary of the invention

[0004] In order to solve at least part of the above problems, the present invention provides a method and user equipment executed by a user equipment, which can ensure that the storage required for processing PDSCH is always within the capability of UE, ensure the correct operation of the service, and make full use of the demodulation capability of UE when the coverage is good, saving system resources.

[0005] According to the present invention, a method performed by a user equipment UE is proposed, comprising: for a PDSCH used for MBS broadcasting, obtaining from the network an RNTI used for DCI scrambling CRC for scheduling the PDSCH, an SCS used for transmitting the PDSCH, and a repetition factor for the PDSCH transmission; and determining the maximum number of PRBs of the PDSCH that can be processed based on the obtained RNTI, the SCS, and the repetition factor.

[0006] In addition, according to the present invention, a method performed by a user equipment UE is proposed, comprising: for a PDSCH used for MBS broadcasting, obtaining from the network the RNTI used for DCI scrambling CRC for scheduling the PDSCH, the SCS used for transmitting the PDSCH, and the number of PRBs of the PDSCH; and determining a range or set of repetition coefficients that can be used for the transmission of the PDSCH based on the obtained RNTI, the SCS, and the number of PRBs.

[0007] Preferably, when the UE receives a PDSCH scheduled by DCI for MBS broadcast using MCCH-RNTI scrambled CRC, the number of PRBs of the processable PDSCH is determined to be no greater than a first value; when the UE receives a PDSCH scheduled by DCI for MBS broadcast or multicast using G-RNTI scrambled CRC, the number of PRBs of the processable PDSCH is determined to be no greater than a second value.

[0008] Preferably, when the UE receives a PDSCH scheduled by DCI for MBS broadcasting using MCCH-RNTI scrambled CRC, the number of PRBs of the processable PDSCH is determined to be no greater than a first value; when the UE receives a PDSCH scheduled by DCI for MBS broadcasting using G-RNTI scrambled CRC, when the PDSCH is not sent on multiple consecutive time slots using a repetition factor configuration, the number of PRBs of the processable PDSCH is determined to be no greater than a second value; when the PDSCH is sent on multiple consecutive time slots using a repetition factor configuration obtained from the network, the number of PRBs of the processable PDSCH is determined to be no greater than a third value.

[0009] In addition, according to the present invention, a method performed by a user equipment UE is proposed, comprising: for a PDSCH used for MBS multicast, obtaining from the network an SCS used to transmit the PDSCH, a repetition factor used for the PDSCH transmission, and a HARQ feedback state used by the PDSCH; and determining the maximum number of PRBs of the PDSCH that can be processed based on the acquired SCS, the repetition factor, and the HARQ feedback state.

[0010] In addition, according to the present invention, a method performed by a user equipment UE is proposed, comprising: for a PDSCH used for MBS multicast, obtaining from the network an SCS used to transmit the PDSCH, the number of PRBs of the PDSCH, and a HARQ feedback status used by the PDSCH; and determining a range or set of repetition coefficients that can be used for the transmission of the PDSCH based on the obtained SCS, the number of PRBs, and the HARQ feedback status.

[0011] Preferably, for the DCI scheduling of G-RNTI scrambled CRC or the DCI scheduling of G-CS-RNTI scrambled CRC or the activated PDSCH, when the PDSCH is transmitted on multiple consecutive time slots without using the repetition factor configuration and the HARQ feedback status indication is no feedback, the number of PRBs of the processable PDSCH is determined to be no greater than the first value; otherwise, the number of PRBs of the processable PDSCH is determined to be no greater than the second value.

[0012] In addition, according to the present invention, a method performed by a user equipment UE is proposed, comprising: obtaining an SCS for transmitting PDSCH and the number of PRBs of the PDSCH from a network; and determining the minimum interval between two adjacent PDSCHs for MBS multicast or broadcast based on the obtained SCS and the number of PRBs.

[0013] Preferably, when the PDSCH is repeatedly transmitted over a plurality of consecutive time slots using a repetition transmission coefficient, the minimum interval is the interval between the last time slot of the last transmission of the previous PDSCH repetition transmission and the first time slot of the next PDSCH.

[0014] In addition, according to the present invention, a user equipment is proposed, comprising: a processor; and a memory storing instructions, wherein the instructions execute the above method when executed by the processor.

[0015] Effects of the Invention

[0016] According to the present invention, it can ensure that the storage required for processing PDSCH is always within the capability range of UE, ensure the correct execution of services, and fully utilize the demodulation capability of UE when the coverage is good, saving system resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a flowchart showing a method performed by a user equipment according to Example 1 of Embodiment 1 of the present invention.

[0019] Figure 2is a flowchart showing a method performed by a user equipment according to Example 2 of Embodiment 1 of the present invention.

[0020] Figure 3 is a flowchart showing a method performed by a user equipment according to Example 1 of Embodiment 2 of the present invention.

[0021] Figure 4 is a flowchart showing a method performed by a user equipment according to Example 2 of Embodiment 2 of the present invention.

[0022] Figure 5 is a flowchart showing a method executed by a user equipment according to embodiment 3 of the present invention.

[0023] Figure 6 The figure is a simplified structural block diagram of a user equipment UE involved in the present invention. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below, which are provided only as examples to convey the scope of the subject matter to those skilled in the art. In addition, for the sake of simplicity, detailed descriptions of known technologies that are not directly related to the present invention are omitted to prevent confusion in the understanding of the present invention.

[0025] Generally, unless clearly given and / or implied different meanings in the context of using the term, all terms used in this article will be interpreted according to their common meanings in the relevant technical field. Unless clearly stated, all references to one element, device, assembly, part, step, etc. should be publicly interpreted as referring to at least one instance of the element, device, assembly, part, step, etc. Unless a step must be clearly described as after or before another step and / or a step must be after or before another step implicitly, the steps of any method disclosed herein do not have to be performed in the exact order disclosed. Where appropriate, any feature of any embodiment disclosed herein may be applicable to any other embodiment. Similarly, any advantage of any embodiment may be applicable to any other embodiment, and vice versa.

[0026] The following uses the 5G / NR mobile communication system and its subsequent evolution versions as example application environments to specifically describe multiple embodiments of the present invention. However, it should be noted that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as communication systems after 5G and 4G and 3G mobile communication systems before 5G, 802.11 wireless networks, etc.

[0027] The following describes some of the terms involved in the present invention. Unless otherwise specified, the terms involved in the present invention are defined herein. The terms given in the present invention may be named differently in LTE, LTE-Advanced, LTE-Advanced Pro, NR and subsequent or other communication systems, but unified terms are used in the present invention, and when applied to a specific system, they can be replaced by the terms used in the corresponding system.

[0028] 3GPP: 3rd Generation Partnership Project

[0029] LTE: Long Term Evolution

[0030] NR: New Radio

[0031] UE:User Equipment

[0032] gNB: NR base station

[0033] FR1: Frequency range 1as defined in TS 38.104, frequency range 1 defined by TS38.104

[0034] FR2: Frequency range 2as defined in TS 38.104, frequency range 2 defined by TS38.104

[0035] BWP: BandWidth Part, bandwidth fragment / part

[0036] SFN: System frame number, system frame number

[0037] OFDM: Orthogonal Frequency Division Multiplexing

[0038] CP: Cyclic Prefix

[0039] TA: Timing Advance, uplink timing advance

[0040] SCS: sub-carrier spacing, sub-carrier spacing

[0041] RB: Resource Block

[0042] RE:Resource Element

[0043] CRB: Common Resource Block

[0044] PRB: Physical Resource Block, physical resource block

[0045] VRB: Virtual resource block, virtual resource block

[0046] REG: Resource Element Group, resource element group

[0047] CCE: Control channel element

[0048] EPRE: Energy per resource element, energy per resource unit

[0049] TDD: Time Division Duplexing

[0050] FDD: Frequency Division Duplexing

[0051] CSI: Channel State Information

[0052] DCI: Downlink Control Information, downlink control information

[0053] MCS: Modulation and Coding Scheme, modulation and coding scheme

[0054] CRC: Cyclic Redundancy Check

[0055] SFI: Slot Format Indication, slot format indication

[0056] QCL: Quasi co-location

[0057] HARQ: Hybrid Automatic Repeat Request

[0058] CORESET: Control resource set, control resource set

[0059] MIB: Master Information Block, master information block

[0060] SIB: system information block

[0061] SIB1: System Information Block Type 1, system information block type 1

[0062] SSB: SS / PBCH block, synchronization signal / physical broadcast channel block

[0063] PSS: Primary Svnchronization Signal, primary synchronization signal

[0064] SSS: Secondary Synchronization Signal, auxiliary synchronization signal

[0065] SRS: Sounding Reference Signal, detection reference signal

[0066] DMRS: Demodulation Reference Signal

[0067] CSI-RS: Channel State Information Reference Signal, channel state information reference signal

[0068] TRS: Tracking Reference Signal, tracking reference signal

[0069] RACH: random-access channel, random access channel

[0070] PBCH: Physical broadcast channel

[0071] PUCCH: Physical Uplink Control Channel, physical uplink control channel

[0072] PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

[0073] PRACH: Physical random-access channel, physical random access channel

[0074] PDSCH: Physical downlink shared channel, physical downlink shared channel

[0075] PDCCH: Physical downlink control channel, physical downlink control channel

[0076] UL-SCH: Uplink Shared Channel, uplink shared channel

[0077] DL-SCH: Downlink Shared Channel, uplink shared channel

[0078] NZP-CSI-RS: Not-Zero-Power CSI-RS, non-zero power CSI-RS

[0079] C-RNTI: Cell Radio Network Temporary Identifier, cell radio network temporary identifier

[0080] P-RNTI: Paging RNTI, Paging Radio Network Temporary Identifier

[0081] RA-RNTI: Random Access RNTI, random access wireless network temporary identifier

[0082] SI-RNTI: System Information RNTI, system information radio network temporary identifier

[0083] TC-RNTI: Temporary C-RNTI, temporary cell wireless network temporary identifier

[0084] RAR: Random access response, random access response

[0085] CSS: Common search space

[0086] RIV: resource indication value, resource indication value

[0087] G-RNTI: Group RNTI, group RNTI

[0088] G-CS-RNTI: group Configured Scheduling RNTI, group configuration scheduling wireless network temporary identifier

[0089] SLIV:Start and length indicator value, start and length indicator value

[0090] MBS: Multicast / Broadcast Service

[0091] MCCH: MBS Control Channel

[0092] The following is a description of the technology associated with the solution of the present invention. Unless otherwise specified, the meanings of the same terms in the specific embodiments and the related technology are the same.

[0093] It is worth pointing out that the user, user equipment and terminal involved in the specification of the present invention have the same meaning. UE can also be used to represent user equipment in the text, and no specific distinction or limitation will be made in the following text. Similarly, network equipment is equipment that communicates with user equipment, including but not limited to base station equipment, gNB, eNB, wireless AP, wireless relay, user equipment with relay capability, etc., and no specific distinction or limitation will be made in the following text. In the text, a base station can be used as a form of network equipment implementation for illustration, and other forms of network equipment can be easily used for replacement in specific implementation.

[0094] In NR, there are many ways to reduce the complexity of user equipment, for example, by limiting the number of MIMO layers supported by the user equipment, or the maximum bandwidth used by the user equipment for service transmission, etc. In NR, a device with limited capabilities is called a RedCap device. RedCap devices support the use of a maximum 20MHz RF and baseband bandwidth on the FR1 band, which can greatly reduce the implementation cost or complexity of user equipment compared to the maximum 100MHz bandwidth required by non-RedCap devices, and can be used in application scenarios that do not require particularly high capabilities. We consider further reducing the bandwidth and capabilities required by RedCap devices, for example, further limiting the total bandwidth used by user equipment for certain PDSCH or PUSCH transmissions on the FR1 band to no more than 5MHz, so that it can further reduce complexity while meeting the maximum rate requirements, and can coexist with RedCap devices or other types of devices in the same network, thereby improving the penetration rate of user equipment and improving network value. To distinguish from other types of UEs, this further limited capability device is recorded as an eRedCap device, or a RedCap UE identified by supportOfRedCap-r18. In the following text, eRedCap UE is used to represent this type of UE.

[0095] In the NR network, the bandwidth of the data channel to be processed by the eRedCap device can be limited to reduce the complexity of the user equipment. For example, the bandwidth that the eRedCap UE needs to process some PDSCHs is limited to a maximum of 5MHz; that is, when the SCS is 15kHz, the maximum number of PRBs that the UE can process is 25, and when the SCS is 30kHz, the maximum number of PRBs that the UE can process is 12. For this limitation, it can be abbreviated as the maximum number of PRBs processed by the UE is 25 / 12 in the following text. For scenarios using different SCSs, similar expressions may also be used when the PRB number limit uses other values, which will not be detailed one by one. On the other hand, in order to better ensure the coexistence of the eRedCap device with other devices, the RF module of the eRedCap UE can support a bandwidth of not less than 20MHz, and the size of the data cache after FFT for downlink reception is not less than 20MHz bandwidth. In this way, the network can configure a downlink BWP with a maximum bandwidth of 20MHz for the eRedCap device for data transmission of the eRedCap device, and use different maximum bandwidth limitation methods for different channels. For example, for some common channels used to transmit common information to all user equipment in a cell, the base station may use PDSCH resources greater than 25 / 12 PRBs to transmit the channel to ensure coverage. At this time, the eRedCap user equipment can cache the FFT data of the entire bandwidth of the relevant channel, and then use more time, such as one or more time slots after the PDSCH reception time slot, for subsequent processing, such as channel estimation, decoding and other operations, which can also receive PDSCH data greater than 25 / 12 PRBs with greatly simplified UE complexity. In this way, the base station can use the same PDSCH resource to share some common channels for eRedCap user equipment and other types of devices in the cell, reducing system resource overhead. Due to the need for additional processing time, eRedCap users also have some restrictions on receiving these PDSCH data. For example, when the base station repeatedly transmits PDSCH in consecutive time slots or schedules different PDSCHs in consecutive time slots, if the bandwidth of PDSCH is greater than 25 / 12, that is, when the eRedCap user is receiving and caching the PDSCH of the current time slot, the cache used by the PDSCH of the previous time slot has not been fully released, which may exceed the cache capacity of the user equipment and cause unsuccessful data transmission.

[0096] In the present invention, the number of PRBs that can be processed is determined by targeting the scenario of using repetition parameters or continuously scheduling PDSCH transmission and the HARQ feedback of users receiving PDSCH data, etc. This enables the base station and the terminal to correctly schedule and receive related data channels, thereby improving the efficiency of the system.

[0097] The implementation of the present invention is described in detail below. Unless otherwise specified, the user equipment or user device mentioned below refers to the eRedCap user equipment.

[0098] [Example 1]

[0099] eRedCap UE can support MBS (Multicast and Broadcast Services), receive related broadcast or multicast PDSCH, obtain related information, and receive related services.

[0100] In NR network, for MBS broadcast service, the same service and the same specific data content are provided to all users in the area (authenticated by reception) at the same time. UE can receive MBS broadcast data in RRC states such as RRC_IDLE, RRC_INACTIVE and RRC_CONNECTED. For MBS multicast service, the same service and the same specific data content are provided to users in a dedicated set at the same time. Users can receive MBS multicast data in RRC_CONNECTED state.

[0101] In the NR network, the MBS services provided can use a variety of data transmission methods. For example, the base station in the cell can use the DCI with MCCH-RNTI scrambled CRC to schedule PDSCH for transmitting relevant MBS configuration information for broadcast sessions. The base station can also schedule PDSCH with G-RNTI scrambled CRC DCI for transmitting MBS broadcast information. The base station can schedule PDSCH with G-RNTI scrambled CRC DCI for transmitting MBS multicast information, or use G-CS-RNTI scrambled CRC DCI scheduling or activate SPS PDSCH transmission for transmitting MBS multicast information, and so on.

[0102] When the base station transmits MBS data using DCI-scrambled or activated PDSCH with G-RNTI or G-CS-RNTI, it also supports repeated transmission of PDSCH in consecutive time slots through high-level parameters or DCI indication. The UE can receive these multiple PDSCHs and merge them according to their coded redundancy version parameters, thereby improving the reception performance of PDSCH.

[0103] For example, when the base station transmits the PDSCH scheduled by the DCI encrypted by the G-RNTI for broadcast, if the pdsch-AggregationFactor is configured in the high-level configuration parameter PDSCH-ConfigPTM, then the same PDSCH symbol configuration is applied to the number of consecutive time slots indicated by the pdsch-AggregationFactor for repeated transmission of the PDSCH.

[0104] In addition, the base station can also indicate the repeated transmission of PDSCH in multiple consecutive time slots through DCI. For example, the DCI can use the bits of the FDRA field to indicate a parameter group entry in the high-level parameter list PDSCH-TimeDomainResourceAllocation to determine the time domain resource parameters used by the currently scheduled PDSCH, such as scheduling delay, symbol starting position and number of symbols (SLIV) in the time slot, etc. A parameter group entry can include a repetitionNumber parameter to indicate that when the SLIV parameter in this item is applied to transmit PDSCH, the same symbol configuration parameter SLIV is applied to the number of consecutive time slots indicated by repetitionNumber, that is, PDSCH is repeatedly transmitted in these consecutive time slots.

[0105] For example, for a DCI-scheduled PDSCH with a G-CS-RNTI scrambled CRC for multicast, or a DCI-scheduled PDSCH with a G-RNTI scrambled CRC for broadcast or multicast, if the TDRA field in the DCI indicates that the PDSCH transmission uses an entry in the PDSCH-TimeDomainResourceAllocation of the higher-level parameter pdsch-ConfigMulticast or PDSCH-Config-Broadcast, and the entry contains the repetitionNumber parameter, then the same symbol configuration parameter SLIV is applied to the number of consecutive time slots indicated by the repetitionNumber for repeated transmission of the PDSCH.

[0106] According to the relevant definition, the parameter pdsch-AggregationFactor can use repetition coefficients such as n2, n4, n8 to indicate that the corresponding number of consecutive time slots is 2, 4, and 8 respectively. The parameter repetitionNumber can use repetition coefficients such as n2, n3, n4, n5, n6, n7, n8, n16 to indicate that the corresponding number of consecutive time slots is 2, 3, 4, 5, 6, 7, 8, 16. For the consistency of the description, we can use n1 to indicate that the number of consecutive time slots is 1, or when n1 is used, PDSCH does not use the above-mentioned method of repeating PDSCH on multiple consecutive time slots, or does not indicate the use of pdsch-AggregationFactor or repetitionNumber for PDSCH transmission through relevant signaling. In addition, the repeated transmission of PDSCH is not a simple repetition, but different coded redundant versions can be used to transmit the same shared channel data, so that the UE may combine multiple transmissions according to a certain method to obtain higher coding gain and good transmission performance.

[0107] In the NR network, for UEs that expect to receive MBS services, they can receive system message SIB20 and receive MCCH information according to the relevant configuration parameters in SIB20. The UE can determine the CFR common frequency resources used for MCCH and MTCH reception based on the CFR-ConfigMCCH-MTCH configuration in the configuration parameters of SIB20. For example, locationAndBandwidthBroadcast is used in CFR-ConfigMCCH-MTCH to indicate whether the relevant frequency resource range is the same as the initial downlink BWP, or the CFR common frequency resources are determined by configuring specific frequency domain offsets and width parameters relative to reference point A. When the locationAndBandwidthBroadcast parameter is not configured, the user determines that the CFR common frequency resources used for broadcasting use the same frequency domain position and bandwidth as CORESET#0 configured in SIB1.

[0108] In the NR network, the bandwidth of the initial downlink BWP used for the FRi band can be up to 100 MHz, that of CORESET#0 can be up to 96 RB, and the bandwidth configured through locationAndBandwidthBroadcast can be up to 273 RB. These bandwidth sizes may exceed the receiving capability of the eRedCap UE.

[0109] Figure 1 is a flowchart showing a method performed by a user equipment according to Example 1 of Embodiment 1 of the present invention.

[0110] like Figure 1As shown, Example 1 of Embodiment 1 includes steps 101 and 103 .

[0111] In step 101, for a PDSCH used for MBS broadcasting, the UE obtains from the network an RNTI used for DCI scrambling CRC for scheduling the PDSCH, an SCS used for transmitting the PDSCH, and a repetition factor used for the PDSCH transmission.

[0112] In step 103, the maximum number of PRBs of the processable PDSCH is determined according to the acquired RNTI, the SCS, and the repetition factor.

[0113] Figure 2 is a flowchart showing a method performed by a user equipment according to Example 2 of Embodiment 1 of the present invention.

[0114] like Figure 2 As shown, Example 2 of Embodiment 1 includes steps 201 and 203 .

[0115] In step 201, for a PDSCH used for MBS broadcasting, the UE obtains from the network the RNTI used for DCI scrambling CRC for scheduling the PDSCH, the SCS used for transmitting the PDSCH, and the number of PRBs of the PDSCH.

[0116] In step 203, a range or set of repetition coefficients that can be used for the PDSCH transmission is determined according to the acquired RNTI, the SCS, and the number of PRBs.

[0117] Optionally, when the UE receives a PDSCH scheduled by DCI for MBS broadcast using MCCH-RNTI scrambled CRC, it determines that the number of PRBs of the processable PDSCH is no greater than A; when the UE receives a PDSCH scheduled by DCI for MBS broadcast or multicast using G-RNTI scrambled CRC, it determines that the number of PRBs of the processable PDSCH is no greater than C.

[0118] Optionally, A and C can be predefined numbers, for example, when the SCS of PDSCH is 15kHz, A is the maximum number of PRBs in 20MHz bandwidth, which is 106, and C is the maximum number of PRBs in 5MHz bandwidth, which is 25. When the SCS of PDSCH is 30kHz, A is the maximum number of PRBs in 20MHz bandwidth, which is 51, and C is the maximum number of PRBs in 5MHz bandwidth, which is 12.

[0119] Since the MCCH-RNTI in a cell is unique and applicable to all UEs, there can be multiple G-RNTIs, which can be set for eRedCap UEs. This can avoid excessive bandwidth restrictions on MCCH transmission and ensure system efficiency.

[0120] Optionally, when the UE receives a PDSCH scheduled by DCI for MBS broadcast using MCCH-RNTI scrambled CRC, the number of PRBs of the processable PDSCH is determined to be no greater than A; when the UE receives a PDSCH scheduled by DCI for MBS broadcast using G-RNTI scrambled CRC, when the repetition factor is not configured to be sent on multiple consecutive time slots, the number of PRBs of the processable PDSCH is determined to be no greater than B; when the PDSCH is sent on multiple consecutive time slots using the repetition factor configured by the higher layer or DCI, the number of PRBs of the processable PDSCH is determined to be no greater than C.

[0121] Optionally, A, B, and C may be predefined numbers, for example, when the SCS of the PDSCH is 15kHz, A and B are the maximum number of PRBs in the 20MHz bandwidth, which is 106, and C is the maximum number of PRBs in the 5MHz bandwidth, which is 25. When the SCS of the PDSCH is 30kHz, A and B are the maximum number of PRBs in the 20MHz bandwidth, which is 51, and C is the maximum number of PRBs in the 5MHz bandwidth, which is 12.

[0122] Optionally, A, B and C can be predefined numbers, for example, when the SCS of PDSCH is 15kHz, A and B are the maximum number of PRBs in 20MHz bandwidth, 106, and C is half of the maximum number of PRB caches in 20MHz bandwidth, 53. When the SCS of PDSCH is 30kHz, A and B are the maximum number of PRBs in 20MHz bandwidth, 51, and C is half of the number of PRB caches in 20MHz bandwidth, 25.

[0123] This ensures that the storage required for processing PDSCH is always within the capability of the UE, ensuring the correct operation of the service, and fully utilizing the demodulation capability of the UE when coverage is good, saving system resources.

[0124] Furthermore, for the PDSCH scheduled by the DCI with G-RNTI scrambled CRC, if the UE can also determine more available PRBs according to the repetition factor used by the PDSCH, it can better support the coexistence of eRedCap UE and other types of UE.

[0125] Optionally, for MBS broadcast, the DCI scheduling PDSCH using the CRC scrambled by the G-RNTI, the user also determines the maximum number of PRBs of the PDSCH that can be processed according to the repetition factor of the PDSCH transmission determined by the higher layer parameters and the SCS used to transmit the PDSCH;

[0126] An example is shown in Table 1, where Y indicates that the UE can support PDSCH transmission under this configuration combination, and N indicates that the UE does not support PDSCH transmission under this configuration combination. A1, A2, A3, B1, B2, B3 are the number of PRBs used to determine the range of each configuration combination. n2, n3, n4 are the repetition coefficients determined by the UE according to the high-level parameter pdsch-AggregationFactor.

[0127] Table 1

[0128]

[0129]

[0130] For example, when the terminal determines that the repetition coefficient configured by the higher layer is n2, when the SCS of the PDSCH is 15kHz, the number of PRBs of the PDSCH that can be processed is one in the range of 1 to A1 or A1+1 to A2; when the SCS of the PDSCH is 30kHz, the number of PRBs that can be processed is one in the range of 1 to B1 or X+1 to X2.

[0131] Optionally, the corresponding combination range can be represented by a method in which a repetition coefficient set corresponds to a PRB range. For example, as shown in Table 2, the UE determines the correspondence between the range of PRBs that can be processed under different SCSs and the set of available repetition coefficients.

[0132] Table 2

[0133]

[0134] As a specific example, in Table 2, when the SCS of PDSCH is 15kHz, PDSCH is transmitted using PRBs in the range of A1+1 to A2, and its repetition coefficient can be one of {n1, n2}.

[0135] Optionally, the maximum number of PRBs corresponding to each repetition coefficient may be used, as shown in Table 3. The terminal determines, based on the repetition coefficient, that the supported number of PRBs when using the coefficient ranges from 1 to the corresponding maximum number of PRBs.

[0136] Table 3

[0137]

[0138] For example, according to Table 3, when the repetition factor configured by the higher layer is n4 and the SCS of the PDSCH is 15 kHz, the maximum number of PRBs that the UE can process is A1.

[0139] In a specific example, the number of related PRBs can be further determined according to relevant conditions. In one scenario, the time for the terminal to process PRBs is proportional to the number of PRBs. When the PRB bandwidth of PDSCH is within 5MHz, no additional cache processing time is required. When the PRB bandwidth is about 5-10MHz, an additional time slot of cache processing time is required. When the PRB bandwidth is about 10-15MHz, an additional 2 time slots of cache processing time are required. When the PRB bandwidth is 15-20MHz, an additional 3 time slots of cache processing time are required. In order to ensure that the cache that the UE needs to maintain in each time slot is not greater than the requirement corresponding to 20MHz, the number of PRBs that can be processed in the time slot is limited. When using a 15KHz SCS, the maximum number of PRBs under a 20MHz BWP is 106. Considering that two caches coexist in the same time slot, the available cache for PDSCH is 53RB. Similarly, the situation of using other SCS configurations can be obtained. Table 1a shows a configuration based on this assumption.

[0140] Table 1a

[0141]

[0142] Similarly, the UE may determine to use a method of corresponding a PRB to a repetition coefficient set or a method of corresponding a repetition coefficient to a maximum PRB, which are respectively represented in Table 2a and Table 3a.

[0143] Table 2a

[0144]

[0145] Table 3a

[0146]

[0147]

[0148] In another scenario, when the terminal processes PRBs, when the PRB bandwidth of PDSCH is within 5MHz, no additional buffer processing time is required, and when the PRB bandwidth is greater than 5MHz, an additional buffer processing time of one time slot is required. Then, when the repetition factor is greater than or equal to 2, it is only necessary to ensure that the number of PRBs of PDSCH is not greater than half of the total bandwidth to meet the processing capacity requirements of the UE. Table 1b shows a configuration based on this scenario.

[0149] Table 1b

[0150]

[0151] Similarly, the UE may determine to use a method of corresponding a PRB to a repetition coefficient set or a method of corresponding a repetition coefficient to a maximum PRB, which may be represented as Table 2b and Table 3b, respectively.

[0152] Table 2b

[0153]

[0154] Table 3b

[0155]

[0156] Different assumptions may be made in other scenarios, and different values ​​of Ax or Bx may be obtained, which will not be explained here one by one.

[0157] In another optional embodiment, when the terminal receives an indication from the network, and the DCI indicates that the currently scheduled PDSCH uses a time domain resource allocation entry including a repetition coefficient repetitionNumber, the terminal determines the number of processable PDSCHs according to the parameter.

[0158] Optionally, for DCI scheduling PDSCH with CRC scrambled by G-RNTI for MBS broadcast, the user determines the maximum number of PRBs of PDSCH that can be processed based on the repetition factor determined by DCI and the SCS used to transmit PDSCH; or for DCI scheduling PDSCH with CRC scrambled by G-RNTI for MBS broadcast, the user determines the range or set of repetition factors that can be used for PDSCH transmission based on the SCS used to transmit PDSCH and the number of PRBs of PDSCH.

[0159] An example is shown in Table 4, where Y indicates that the UE can support PDSCH transmission under this configuration combination, and N indicates that the UE does not support PDSCH transmission under this configuration combination. A1, A2, A3, B1, B2, B3 are the number of PRBs used to determine the range of each configuration combination. n2, n3, n4, ..., n16 are the repetition coefficients determined by the UE according to repetitionNumber.

[0160] Table 4

[0161]

[0162] Optionally, the corresponding combination range can be represented by a method in which a repetition coefficient set corresponds to a PRB range. For example, as shown in Table 5, the UE determines the correspondence between the range of PRBs that can be processed under different SCSs and the set of available repetition coefficients.

[0163] Table 5

[0164]

[0165] As a specific example, in Table 5, when the SCS of PDSCH is 15 kHz, PDSCH is transmitted using PRBs in the range of A1+1 to A2, and its repetition coefficient can be one of {n1, n2, n3}.

[0166] Optionally, the maximum number of PRBs corresponding to each repetition coefficient may be used, as shown in Table 3. The terminal determines, based on the repetition coefficient, that the supported number of PRBs when using the coefficient ranges from 1 to the corresponding maximum number of PRBs.

[0167] Table 6

[0168]

[0169] For example, according to Table 3, when the repetition factor configured by the higher layer is n4 and the SCS of the PDSCH is 15 kHz, the maximum number of PRBs that the UE can process is A1.

[0170] In a specific example, the number of relevant PRBs can be further determined according to relevant conditions. In one scenario, the time for the terminal to process PRBs is proportional to the number of PRBs. When the PRB bandwidth of the PDSCH is within 5MHz, no additional cache processing time is required. When the PRB bandwidth is about 5-10MHz, an additional time slot of cache processing time is required. When the PRB bandwidth is about 10-15MHz, an additional 2 time slots of cache processing time are required. When the PRB bandwidth is 15-20MHz, an additional 3 time slots of cache processing time are required. In order to ensure that the cache that the UE needs to maintain in each time slot is not greater than the requirement corresponding to 20MHz, the number of PRBs that can be processed in the time slot is limited. Table 4a gives a configuration based on this assumption.

[0171] Table 4a

[0172]

[0173]

[0174] Similarly, the manner of determining whether to use a PRB corresponding to a repetition coefficient set or a repetition coefficient corresponding to a maximum PRB can be represented as Table 5a and Table 6a, respectively.

[0175] Table 5a

[0176]

[0177] Table 6a

[0178]

[0179] In another scenario, when the terminal processes PDSCH, when the PRB bandwidth of PDSCH is within 5MHz, no additional buffer processing time is required, and when the PRB bandwidth is greater than 5MHz, an additional buffer processing time of one time slot is required. Table 4b shows a configuration based on this assumption.

[0180] Table 4b

[0181]

[0182] Similarly, the manner of determining whether to use a PRB corresponding to a repetition coefficient set or a repetition coefficient corresponding to a maximum PRB can be represented as Table 5b and Table 6b, respectively.

[0183] Table 5b

[0184]

[0185] Table 6b

[0186]

[0187] In addition, since the coefficient set of the repetition parameter pdsch-AggregationFactor used is a subset of the repetition parameter coefficient indicated by the repetitionNumber parameter, a unified method can be applied to determine the size of the relevant PRB for the occasions where these two parameters are used to indicate the repetition coefficient. For example, the scenarios of Tables 1, 2, and 3 are used as a subset of Tables 4, 5, and 6 respectively, and the UE can apply the relationship between the corresponding repetition factor and the number of PRBs in Tables 4 / 5 / 6 to the scenarios of Tables 1 / 2 / 3. Examples are not given here one by one.

[0188] When only the peak rate limiting feature FG48-2 is used to reduce UE complexity, the eRedCap UE can process PDSCH data with a bandwidth of no more than 20MHz. The UE may receive MBS broadcast PDSCH in RRC_IDLE, RRC_INACTIVE or RRC_CONNECTED state. When the UE is in RRC_CONNECTED state, the base station can obtain the UE's capability information when performing multicast services with the UE, and then distinguish the UE's feature type to enable better data transmission.

[0189] Optionally, when the UE is in RRC_CONNECTED and does not have the FG48-2 feature or the UE is in RRC_IDLE or RRC_INACTIVE state, this embodiment is applicable, and the UE determines the number of PRBs that can be processed according to the method in the aforementioned optional embodiment.

[0190] [Example 2]

[0191] The base station may transmit the MBS multicast information by using the DCI scheduling PDSCH with the G-RNTI scrambled CRC, or may use the DCI scheduling or activation SPS PDSCH with the G-CS-RNTI scrambled CRC to transmit the MBS multicast information.

[0192] When using DCI scheduling with G-RNTI scrambled CRC or DCI scheduling with G-CS-RNTI scrambled CRC or activating PDSCH transmission, the base station also supports a method of repeatedly transmitting PDSCH on consecutive time slots.

[0193] For example, when the base station transmits a DCI-scheduled PDSCH scrambled by a G-RNTI for multicast, if the pdsch-AggregationFactor parameter is configured in the MBS-RNTI-SpecificConfig associated with the G-RNTI, the same symbol configuration is applied to the number of consecutive time slots indicated by the pdsch-AggregationFactor. The base station repeatedly transmits the PDSCH in these time slots.

[0194] When receiving a PDSCH scheduled by a DCI with a G-CS-RNTI scrambled CRC, or a PDSCH with no PDCCH transmission that applies an SPS-Config and is activated by a DCI with a G-CS-RNTI scrambled CRC, if pdsch-AggregationFactor is configured in the associated SPS-Config, the same symbol configuration is applied to the number of consecutive time slots indicated by pdsch-AggregationFactor. The base station repeats the transmission of PDSCH on these time slots.

[0195] On the other hand, the repetition of PDSCH on consecutive time slots can also be indicated by DCI. For example, for DCI-scheduled PDSCH transmission with G-CS-RNTI scrambled CRC for multicast, if the TDRA field in the DCI indicates that an entry parameter group of PDSCH-TimeDomainResourceAllocation in pdsch-ConfigMulticast contains the repetitionNumber parameter, the same SLIV is applied to the consecutive time slots indicated by repetitionNumber.

[0196] Different from the PDSCH reception process associated with the MBS broadcast service, the UE may also use different HARQ-ACK modes when receiving the MBS multicast service according to the higher layer indication or the indication in the DCI. For example, for a multicast service, the base station may use the higher layer indication parameter harq-FeedbackEnablerMulticast to indicate the mode of the HARQ process associated with the relevant G-RNTI. When this parameter is missing, the UE does not use HARQ feedback when receiving the corresponding MBS multicast service. When this parameter exists and is indicated as enabled, the UE always uses HARQ feedback for the MBS multicast service in response. When this parameter exists and is indicated as dci-enabler, it is determined whether to use HARQ feedback for the PDSCH scheduled by the corresponding DCI according to the indication in the DCI. When the Enabling / disabling HARQ-ACK feedback indication in the DCI indicates 1, the UE uses HARQ feedback for the PDSCH scheduled or activated by the DCI. When the indication is 0, the UE does not use HARQ feedback for the PDSCH scheduled or activated by the DCI.

[0197] When harq-FeedbackEnablerMulticast is configured in the network, the network also indicates the HARQ feedback mode through harq-FeedbackOptionMulticast. When harq-FeedbackOptionMulticast indicates ack-nack, the UE needs to feedback the corresponding ACK or NACK information according to the received PDSCH demodulation situation, or it is called the first HARQ-ACK reporting mode; when it is indicated as NACK-Only, the UE only needs to feedback NACK information when the received PDSCH demodulation is erroneous, or it is called the second HARQ-ACK reporting mode.

[0198] When only the peak rate limiting feature FG48-2 is used to reduce UE complexity, the eRedCap UE can process PDSCH data with a bandwidth of no more than 20MHz. And the UE always receives multicast PDSCH in the RRC_connected state, and the base station can obtain the UE's capability information when performing multicast services with the UE. Therefore, when the UE does not have the FG48-2 feature, this embodiment is applicable.

[0199] Figure 3 is a flowchart showing a method performed by a user equipment according to Example 1 of Embodiment 2 of the present invention.

[0200] like Figure 3 As shown, Example 1 of Embodiment 2 includes steps 301 and 303 .

[0201] In step 301, for a PDSCH used for MBS multicast, the UE obtains from the network an SCS used to transmit the PDSCH, a repetition factor used for the PDSCH transmission, and a HARQ feedback state used by the PDSCH.

[0202] In step 303, the maximum number of PRBs of the processable PDSCH is determined according to the acquired SCS, the repetition coefficient, and the HARQ feedback state.

[0203] Figure 4 is a flowchart showing a method performed by a user equipment according to Example 2 of Embodiment 2 of the present invention.

[0204] like Figure 4 As shown, Example 2 of Embodiment 2 includes steps 401 and 403 .

[0205] In step 401, for a PDSCH used for MBS multicast, the UE obtains from the network the SCS used to transmit the PDSCH, the number of PRBs of the PDSCH, and the HARQ feedback state used by the PDSCH.

[0206] In step 403, a range or set of repetition coefficients that can be used for the PDSCH transmission is determined based on the acquired SCS, the number of PRBs, and the HARQ feedback status.

[0207] Optionally, for an eRedCap UE that is not indicated to use only the peak rate limiting feature, for a PDSCH that is used for MBS multicast, a DCI scheduling of a G-RNTI scrambled CRC, or a DCI scheduling or activation of a G-CS-RNTI scrambled CRC, when the PDSCH is not transmitted on multiple consecutive time slots using a repetition factor configuration, and the HARQ feedback state is indicated by a high-level parameter as no feedback, the UE determines that the number of PRBs of the PDSCH that can be processed is not greater than A; otherwise, the UE determines that the number of PRBs of the PDSCH that can be processed is not greater than B. A and B can be predefined numbers, for example, when the SCS of the PDSCH is 15kHz, A is 106 and B is 25. When the SCS of the PDSCH is 30kHz, A is 51 and B is 12. This ensures that the storage required to process the PDSCH is always within the capability of the UE, ensuring the correct conduct of the service.

[0208] According to this embodiment, when the UE is configured not to require HARQ feedback, the UE can use the cache to store data and extend the processing time, so that when the base station transmits multicast information, a larger bandwidth can be used to share transmission resources for the eRedCap UE and other users.

[0209] Similar to the method in which the UE determines the repetition coefficient and the number of PRBs of the PDSCH in Example 1, if the number of PRBs of the PDSCH is further determined according to the repetition coefficient used by the PDSCH, the coexistence of the eRedCap UE and other types of UEs can be better supported.

[0210] Optionally, when the DCI scheduling PDSCH using the CRC scrambled by the G-RNTI for MBS multicast and the HARQ feedback state is indicated by the high-level parameters as no feedback, the user determines the maximum number of PRBs of the PDSCH that can be processed according to the repetition factor of the PDSCH transmission determined by the high-level parameters and the SCS used to transmit the PDSCH. For example, the number of PRBs when the PDSCH applies the repetition factor indicated by the high-level layer is determined according to Table 1, Table 2, or Table 3, or the number of PRBs when the PDSCH applies the repetition factor indicated by the DCI is determined according to Table 4, Table 5, or Table 6.

[0211] Similarly, when using the above method to determine the number of PRBs or a set of repetition coefficients for the PDSCH used for multicast, the relationship between the maximum number of PRBs and the repetition coefficient can also be determined according to different UE conditions. Please refer to the relevant examples in Example 1. For example, when determining the repetition coefficient configured by a high layer or the repetition coefficient indicated by the DCI according to the scenarios related to Table 1b / 2b / 3b / 4b / 5b / 6b, the relationship between different numbers of PRBs will not be repeated here.

[0212] [Example 3]

[0213] The base station may use multiple DCIs to schedule the transmission of different PDSCHs in consecutive time slots, or transmit different PDSCHs in consecutive time slots by configuring SPS parameters. For example, the first DCI is used to schedule the first PDSCH using N1 PRBs in time slot n, and the second DCI is used to schedule the second PDSCH using N2 PRBs in time slot n+1. If N1 is large, the cache used to process the PDSCH in time slot n+1 has not been released, which may cause the UE to fail to receive the PDSCH in time slot n+1. On the other hand, if these different PDSCHs scheduled by the base station are also configured with repeated transmissions, so that the UE needs to receive in more consecutive time slots, there is a similar problem. In these scenarios, when the UE receives the PDSCH, it is similar to receiving the PDSCH transmission in consecutive time slots in the previous embodiment. If there are no restrictions on the transmission of the PDSCH, there may be a problem of exceeding the UE's receiving capability.

[0214] Figure 5 is a flowchart showing a method executed by a user equipment according to embodiment 3 of the present invention.

[0215] like Figure 5As shown, embodiment 3 includes steps 501 and 503.

[0216] In step 501, the UE obtains the SCS and the number of PRBs used by the PDSCH from the network.

[0217] In step 503, a minimum interval between two adjacent PDSCHs for MBS multicast or broadcast is determined according to the acquired SCS and the number of PRBs.

[0218] Optionally, the UE determines the minimum interval between two adjacent PDSCHs based on the number of PRBs used by the first PDSCH and the SCS. Optionally, the interval is determined using the number of time slots. In this case, the interval is the number of time slots between the last time slot where the first PDSCH is located and the first time slot where the second PDSCH is located. For example, the last time slot where the first PDSCH is located is time slot n, and the first time slot where the second PDSCH is located is time slot n+k, then the interval is k-1 time slots.

[0219] A specific example is shown in Table 7. The UE can determine the minimum number of interval time slots between two PDSCHs based on the table and the number of PRBs and SCS used by the first PDSCH. If the interval is less than the interval, the UE does not need to process the second PDSCH.

[0220] Table 7

[0221]

[0222] Specifically, further, the specific number of PRBs and the number of intervals can be determined according to different situations of UE processing capabilities. For example, assuming that the number of additional processing time slots required by the UE when processing a bandwidth greater than 5MHz has a certain proportional relationship with the size of the bandwidth. Then an example of the relationship between the minimum interval time slot required by the bandwidth of the PDSCH and the PRB is shown in Table 7a.

[0223] Table 7a

[0224]

[0225] For another example, assume that the number of time slots of additional processing time required by the UE when processing a bandwidth greater than 5 MHz is 1. Then an example of the relationship between the minimum interval time slot required by the bandwidth of the PDSCH and the PRB is shown in Table 7b.

[0226] Table 7b

[0227]

[0228]

[0229] Optionally, when PDSCH is repeatedly transmitted over multiple consecutive time slots using a repetition factor, the minimum interval is the interval between the last time slot of the last transmission of the previous repeated transmission of PDSCH and the first time slot of the next PDSCH.

[0230] Optionally, the interval is determined by the number of symbols. In this case, the interval is the number of symbols between the last symbol of the last time slot where the first PDSCH is located and the first symbol of the first time slot where the second PDSCH is located. For example, the last time slot where the first PDSCH is located is time slot n, the last symbol is 12, and the first time slot where the second PDSCH is located is time slot n+k, and the first symbol is 2. At the same time, assuming that the number of symbols in a time slot in the cell is 14, and the symbol number starts counting from 0, then the symbol interval is (k-1)*14+3 symbols.

[0231] Optionally, when the PDSCH is repeatedly transmitted over multiple consecutive time slots using a repetition factor, the minimum interval is the interval between the last symbol of the last transmission of the previous repeated transmission of the PDSCH and the first symbol of the next PDSCH.

[0232] When only the peak rate limiting feature FG48-2 is used to reduce UE complexity, the eRedCap UE can process PDSCH data with a bandwidth no greater than 20 MHz.

[0233] Optionally, when the UE is in RRC_CONNECTED state and has the FG48-2 feature, the UE determines that the minimum interval is 0, otherwise the UE determines the number of PRBs that can be processed according to the method in the aforementioned optional embodiment.

[0234] The UE may also determine the correspondence between the minimum interval symbol and the number of PRBs using a table relationship in a similar manner to the above embodiment. The UE may also determine the minimum interval symbol number K based on the calculation of the number of PRBs. For example, when the SCS used by the PDSCH is 15kHz and the normal CP is used, K=ceil(N / 25)*14. N is the number of PRBs used,

[0235] Similarly, the UE may also use absolute time to determine the minimum interval, and may also use a similar method, which will not be repeated here.

[0236] When the interval between two adjacent PDSCHs is less than the minimum interval, the UE also needs to determine how to handle the related PDSCH reception. After the UE determines the minimum interval, it can also determine the processing priority according to the type of PDSCH. Optionally, when the first PDSCH is a DCI-scheduled PDSCH with SI-RNTI or P-RNTI or RA-RNTI or MsgB-RNTI or MCCH-RNTI scrambled CRC, the UE always receives the corresponding first PDSCH. Optionally, when the first PDSCH is a DCI-scheduled or activated PDSCH with G-CS-RNTI scrambled CRC, and the second PDSCH is a DCI-scheduled PDSCH with C-RNTI or G-RNTI scrambled CRC, the UE always receives the second PDSCH.

[0237] [Modifications]

[0238] Next, use Figure 6 The following is an explanation of a user equipment as an embodiment that can execute the method executed by the user equipment described in detail above in the present invention.

[0239] Figure 6 It is a block diagram showing a user equipment UE involved in the present invention.

[0240] like Figure 6 As shown, the user equipment UE600 includes a processor 601 and a memory 602. The processor 601 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 602 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories, etc. Program instructions are stored on the memory 602. When the instructions are executed by the processor 601, the above method performed by the user equipment described in detail in the present invention may be executed.

[0241] The method of the present invention and the devices involved have been described above in conjunction with the preferred embodiments. Those skilled in the art will appreciate that the method shown above is only exemplary, and the embodiments described above can be combined with each other without contradiction. The method of the present invention is not limited to the steps and sequence shown above. The network node and user equipment shown above may include more modules, for example, modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, etc. The various identifiers shown above are only exemplary and not restrictive, and the present invention is not limited to specific information elements that serve as examples of these identifiers. Those skilled in the art may make many changes and modifications based on the teachings of the illustrated embodiments. In addition, the above embodiments may not be limited to applications to devices with reduced capabilities. If other devices have similar requirements, such as performance improvement, etc., relevant methods may also be applied to obtain corresponding effects.

[0242] It should be understood that the above embodiments of the present invention can be implemented by software, hardware, or a combination of software and hardware. For example, the various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), programmable logic devices (CPLDs), and the like.

[0243] In this application, "base station" may refer to a mobile communication data and control exchange center with a large transmission power and a wide coverage area, including functions such as resource allocation scheduling, data reception and transmission, etc. "User equipment" may refer to user mobile user equipment, such as mobile phones, notebooks, etc., which can communicate wirelessly with base stations or micro base stations.

[0244] In addition, the embodiments of the present invention disclosed herein can be implemented on a computer program product. More specifically, the computer program product is a product as follows: having a computer-readable medium, on which a computer program logic is encoded, and when executed on a computing device, the computer program logic provides relevant operations to implement the above-mentioned technical solution of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operation (method) described in the embodiment of the present invention. This arrangement of the present invention is typically provided as software, code and / or other data structures arranged or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), a floppy disk or a hard disk, or other media such as firmware or microcode on one or more ROM or RAM or PROM chips, or downloadable software images in one or more modules, shared databases, etc. The software or firmware or such a configuration can be installed on a computing device so that one or more processors in the computing device execute the technical solution described in the embodiment of the present invention.

[0245] In addition, each functional module or each feature of the base station device and the user equipment used in each of the above embodiments can be implemented or executed by a circuit, which is usually one or more integrated circuits. The circuits designed to perform the various functions described in this specification may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC) or a general-purpose integrated circuit, a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, or a discrete hardware component, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller or state machine. The above-mentioned general-purpose processor or each circuit may be configured by a digital circuit, or may be configured by a logic circuit. In addition, when, due to the advancement of semiconductor technology, an advanced technology that can replace the current integrated circuit appears, the present invention may also use an integrated circuit obtained using the advanced technology.

[0246] Although the present invention has been illustrated above in conjunction with the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications, substitutions and changes may be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention should not be limited by the above-described embodiments, but by the appended claims and their equivalents.

Claims

1. A method performed by a user equipment UE, comprising: For the PDSCH used for MBS broadcast, the RNTI used for the DCI scrambling CRC for scheduling the PDSCH, the SCS used for transmitting the PDSCH, and the repetition factor used for the PDSCH transmission are obtained from the network; as well as The maximum number of PRBs of the PDSCH that can be processed is determined based on the acquired RNTI, the SCS, and the repetition factor.

2. A method performed by a user equipment UE, comprising: For the PDSCH used for MBS broadcast, the RNTI used for the DCI scrambling CRC for scheduling the PDSCH, the SCS used to transmit the PDSCH, and the number of PRBs of the PDSCH are obtained from the network; as well as According to the acquired RNTI, the SCS, and the number of PRBs, a range or set of repetition coefficients that can be used for transmission of the PDSCH is determined.

3. The method according to claim 1 or 2, wherein: When the UE receives a DCI-scheduled PDSCH for MBS broadcasting using an MCCH-RNTI scrambled CRC, determining that the number of PRBs of the processable PDSCH is not greater than a first value, When the UE receives a PDSCH scheduled by DCI using a G-RNTI scrambled CRC for MBS broadcast or multicast, the UE determines that the number of PRBs of the processable PDSCH is not greater than the second value.

4. The method according to claim 1 or 2, wherein: When the UE receives a DCI-scheduled PDSCH for MBS broadcasting using an MCCH-RNTI scrambled CRC, determining that the number of PRBs of the processable PDSCH is not greater than a first value, When the UE receives a PDSCH scheduled by DCI using a G-RNTI scrambled CRC for MBS broadcast, without using a repetition factor configuration to send on multiple consecutive time slots, determining that the number of PRBs of the processable PDSCH is not greater than a second value, When the PDSCH is sent on a plurality of consecutive time slots using a repetition factor configuration acquired from a network, the number of PRBs of the processable PDSCH is determined to be no greater than a third value.

5. A method performed by a user equipment UE, comprising: For the PDSCH used for MBS multicast, the SCS used to transmit the PDSCH, the repetition factor used for the PDSCH transmission, and the HARQ feedback state used by the PDSCH are obtained from the network; as well as The maximum number of PRBs of the PDSCH that can be processed is determined based on the acquired SCS, the repetition coefficient, and the HARQ feedback status.

6. A method performed by a user equipment UE, comprising: For the PDSCH used for MBS multicast, the SCS used to transmit the PDSCH, the number of PRBs of the PDSCH, and the HARQ feedback status used by the PDSCH are obtained from the network; as well as Based on the acquired SCS, the number of PRBs, and the HARQ feedback status, a range or set of repetition coefficients that can be used for transmission of the PDSCH is determined.

7. The method according to claim 5 or 6, wherein: For DCI scheduling of G-RNTI scrambled CRC or DCI scheduling of G-CS-RNTI scrambled CRC or activated PDSCH, when the PDSCH is transmitted on multiple consecutive time slots without using a repetition factor configuration and the HARQ feedback status indication is no feedback, the number of PRBs of the processable PDSCH is determined to be no greater than a first value; otherwise, the number of PRBs of the processable PDSCH is determined to be no greater than a second value.

8. A method performed by a user equipment UE, comprising: Obtain the SCS used to transmit PDSCH and the number of PRBs of PDSCH from the network; as well as The minimum interval between two adjacent PDSCHs used for MBS multicast or broadcast is determined according to the acquired SCS and the number of PRBs.

9. The method according to claim 8, wherein: When PDSCH is repeatedly transmitted over multiple consecutive time slots using a repetition transmission coefficient, the minimum interval is the interval between the last time slot of the last transmission of the previous PDSCH repetition transmission and the first time slot of the next PDSCH.

10. A user equipment, comprising: processor; as well as Memory, which stores instructions, Wherein, when the instructions are executed by the processor, the method according to any one of claims 1 to 9 is executed.

Images