CN118234039A

CN118234039A - Method for determining downlink frequency domain resource and user equipment

Info

Publication number: CN118234039A
Application number: CN202211646570.9A
Authority: CN
Inventors: 马小骏; 刘仁茂; 罗超
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Filing date: 2022-12-19
Publication date: 2024-06-21

Abstract

The invention provides a method for determining downlink frequency domain resources, which is executed by User Equipment (UE), and comprises the following steps: determining a downlink resource allocation mode based on a high-level parameter of network configuration; determining whether a downlink frequency domain frequency hopping parameter exists in high-level parameters of network configuration; determining whether PDSCH repetition parameters indicating the application of the same symbol allocation over several consecutive slots exist in higher layer parameters of the network configuration; and when the downlink frequency domain frequency hopping parameter and the PDSCH repetition parameter exist in the high-level parameters configured by the network, determining downlink frequency domain resources for transmitting the PDSCH on the continuous time slot indicated by the PDSCH repetition parameter by using the downlink frequency domain frequency hopping parameter and the frequency domain resource allocation parameter corresponding to the determined downlink resource allocation mode.

Description

Method for determining downlink frequency domain resource and user equipment

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method for determining downlink frequency domain resources performed by a user equipment and a corresponding user equipment.

Background

This section presents a simplified summary in order to provide a better understanding of various aspects of the invention. The statements in this section are thus to be read in this light, and not as admissions of what is or is not prior art.

Several typical applications are defined in 5G systems, for example, industrial wireless sensor applications are aimed at speeding up industrial transformation and digitization to obtain flexibility in industrial production processes, improving productivity and efficiency, also helping to reduce maintenance, improve operational safety, etc. The video monitoring equipment is applied to intelligent city construction, and better city management and service are realized by aid of assistance. Wearable devices may be used for intelligent services in a number of aspects of medicine, life, etc. Devices for these applications all desire lower complexity and less power consumption to reduce cost and expand the application range. Rel-17 reduces the maximum bandwidth of some device types from 100MHz to 20MHz, thereby reducing device cost. To further reduce the complexity of the user devices, new approaches may be taken, such as reducing the peak data rate supported by these devices to around 10Mbps, or further reducing the maximum bandwidth of the user devices from 20MHz to 5MHz. These methods, or combinations thereof, can further reduce the complexity of the device in different ways, reducing costs. Meanwhile, considering the need to ensure coexistence of the devices and other types of NR user equipment in the same cell so as to maintain ecological integrity, maximize ecological scale and promote network benefit, the new service requirements present some new problems for the existing NR network. For example, the data transmission bandwidth scheduled to the user equipment does not exceed 5MHz, which may result in degradation of transmission performance, etc., and may require some enhancement to ensure terminal performance. The related method provides a better method for realizing the devices in the network, and can ensure the coexistence of the devices in the network with the existing devices when the related constraint conditions are met, thereby obtaining better network utilization efficiency.

Disclosure of Invention

In order to solve at least a part of the above problems, the present invention provides a method executed by a user equipment and the user equipment, which can meet the requirement of related equipment in a network for reducing data transmission bandwidth, and ensure the coexistence requirement with the existing equipment in the network, thereby obtaining better network utilization efficiency.

According to the present invention, there is provided a method performed by a user equipment for determining downlink frequency domain resources, comprising: determining a downlink resource allocation mode based on a high-level parameter of network configuration; determining whether a downlink frequency domain frequency hopping parameter exists in high-level parameters of network configuration; determining whether PDSCH repetition parameters indicating the application of the same symbol allocation over several consecutive slots exist in higher layer parameters of the network configuration; and when the downlink frequency domain frequency hopping parameter and the PDSCH repetition parameter exist in the high-level parameters configured by the network, determining downlink frequency domain resources for transmitting the PDSCH on the continuous time slot indicated by the PDSCH repetition parameter by using the downlink frequency domain frequency hopping parameter and the frequency domain resource allocation parameter corresponding to the determined downlink resource allocation mode.

Furthermore, according to the present invention, there is provided a user equipment comprising: a processor; and a memory storing instructions, wherein the instructions, when executed by the processor, perform the method described above.

Effects of the invention

According to the invention, the capacity reduction requirement of related equipment in the network can be met, the coexistence requirement of the related equipment in the network can be ensured, and the better network utilization efficiency can be obtained.

Drawings

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

fig. 1 is a flowchart of a method of determining downlink frequency domain resources performed by a user equipment according to an embodiment of the present invention.

Fig. 2 is a flowchart of one example of a downlink frequency domain resource determining process in a method of determining downlink frequency domain resources according to an embodiment of the present invention.

Fig. 3 is a flowchart of another example of a downlink frequency domain resource determining process in a method of determining downlink frequency domain resources according to an embodiment of the present invention.

Fig. 4 is a flowchart of still another example of a downlink frequency domain resource determining process in a method of determining downlink frequency domain resources according to an embodiment of the present invention.

Fig. 5 is a schematic block diagram of a user equipment UE according to the present invention.

Detailed Description

The invention is described in detail below with reference to the drawings and the detailed description. It should be noted that the present invention should not be limited to the specific embodiments described below, which are provided as examples only in order to convey the scope of the subject matter to those skilled in the art. In addition, for the sake of brevity, detailed descriptions of well-known techniques, which are not directly related to the present invention, are omitted to prevent confusion of the understanding of the present invention.

Generally, all terms used herein will be interpreted according to their ordinary meaning in the relevant art, unless explicitly given and/or implied by the use of such terms in the context of their use. All references to one such element, device, component, section, step, etc. are to be interpreted openly as referring to at least one instance of the element, device, component, section, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless it has to be explicitly described as being followed or preceded by another step and/or implicitly as being followed or preceded by another step. Any feature of any embodiment disclosed herein may be applicable to any other embodiment, where appropriate. Likewise, any advantages of any embodiment may apply to any other embodiment and vice versa.

Various embodiments in accordance with the present invention are described in detail below with respect to an exemplary application environment for a 5G/NR mobile communication system and its subsequent evolutions. However, it should be noted that the present invention is not limited to the following embodiments, but is applicable to many other wireless communication systems, such as a communication system after 5G and 4G, 3G mobile communication systems before 5G, 802.11 wireless networks, etc.

The following describes some of the terms involved in the present invention. Unless otherwise indicated, the terms used in connection with the present invention are defined herein. The terms given in the present invention may be named differently in LTE, LTE-Advanced Pro, NR and later or other communication systems, but the present invention uses uniform terms, and when applied to a specific system, may be replaced by terms used in the corresponding system.

3GPP:3rd Generation Partnership Project third generation partnership project

LTE: long Term Evolution Long term evolution technology

NR: new Radio, new air interface

UE: user Equipment

GNB: NR base station

FRi: frequency range 1as defined in TS38.104, frequency range 1 defined by TS38.104

FR2: frequency range 2as defined in TS38.104, frequency range 2 defined by TS38.104

BWP: bandwidth Part, bandWidth segment/section

SFN: SYSTEM FRAME number, system frame number

OFDM: orthogonal Frequency Division Multiplexing orthogonal frequency division multiplexing

CP: cyclic Prefix

TA: TIMING ADVANCE uplink timing advance

SCS: sub-CARRIER SPACING subcarrier spacing

RB: resource Block, resource Block

RE: resource Element, resource unit

CRB: common Resource Block common resource blocks

PRB: physical Resource Block physical resource blocks

VRB: virtual resource block virtual resource blocks

REG: resource Element Group resource unit group

CCE: control CHANNEL ELEMENT, control channel unit

EPRE: ENERGY PER resource element, energy per resource unit

TDD: time Division Duplexing time division duplexing

FDD: frequency Division Duplexing frequency division duplexing

CSI: CHANNEL STATE Information, channel state Information

DCI: downlink Control Information downlink control information

MCS: modulation and Coding Scheme modulation coding scheme

CRC: cyclic Redundancy Check cyclic redundancy check

SFI: slot Format Indication, slot format indication

QCL: quasi co-location, quasi co-location

HARQ: hybrid Automatic Repeat Request hybrid automatic repeat request

CORESET: control resource set controlling resource sets

MIB: master Information Block main information block

SIB: system information block System information block

SIB1: system Information Block Type 1, system information block type 1

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

PSS: primary Synchronization Signal, primary synchronization signal

SSS: secondary Synchronization Signal, auxiliary synchronization signal

SRS: sounding REFERENCE SIGNAL, sounding reference signal

DMRS: demodul ation REFERENCE SIGNAL demodulation reference signal

CSI-RS: CHANNEL STATE Information REFERENCE SIGNAL, channel state Information reference signal

TRS: TRACKING REFERENCE SIGNAL tracking reference signals

RACH: random-ACCESS CHANNEL random access channel

PBCH: physical broadcast channel physical broadcast channel

PUCCH: physical Uplink Control Channel physical uplink control channel

PUSCH: physical Uplink SHARED CHANNE1, physical Uplink shared channel

PRACH: physical random-ACCESS CHANNEL Physical random access channel

PDSCH: physical downlink SHARED CHANNEL physical downlink shared channel

PDCCH: physical downlink control channel physical downlink control channel

UL-SCH: uplink SHARED CHANNEL Uplink shared channel

DL-SCH: downlink SHARED CHANNEL, uplink shared channel

NZP-CSI-RS: not-Zero-Power CSI-RS, non-Zero Power CSI-RS

C-RNTI: cell Radio Network Temporary Identifier cell radio network temporary identity

P-RNTI: PAGING RNTI paging radio network temporary identity

RA-RNTI: random ACCESS RNTI, random access wireless network temporary identifier

CS-RNTI: configured Scheduling RNTI, configuring scheduling wireless network temporary identities

SI-RNTI: system Information RNTI System information radio network temporary identification

TC-RNTI: temporary C-RNTI, temporary cell radio network temporary identity

RAR: random access response random access response

CSS: common SEARCH SPACE, common search space

RIV: resource indication value resource indication value

The following is a description of the technology associated with the scheme of the present invention. Unless otherwise indicated, the same terms in the specific examples have the same meaning as those in the related art.

It should be noted that, in the description of the present invention, the user equipment has the same meaning as the terminal, and the UE may also be used to denote the user equipment, which is not specifically distinguished and limited hereinafter. Similarly, the network device is a device that communicates with the user device, including but not limited to a base station device, a gNB, an eNB, a wireless AP, a wireless relay, a relay-capable user device, and the like, and is not specifically distinguished and limited hereinafter. The description herein may be made in terms of one form of base station implemented as a network device, and other forms of network device may be readily substituted for the specific implementation.

DCI transmittable through PDCCH in a network indicates a user equipment to receive PDSCH. The DCI information may include Time Domain Resource Allocation (TDRA) of PDSCH, frequency Domain Resource Allocation (FDRA) and other parameters such as TCI status information, antenna port information, NDI, etc. SPS (Semi-PERSISTENT SCHEDULING) parameters may also be configured in the network and DCI may be used to activate or deactivate transmissions of PDSCH that may not require scheduling of DCI. The ue may determine configuration information of PDSCH on one or more timeslots according to DCI and higher layer configuration parameters, including time-frequency resource locations, related reference signals, etc., to implement data transmission. The DCI may have a variety of formats for indicating different commands. For example, DCI format 10 is used for scheduling some downlink common PDSCH, and DCI format 11 may be used for scheduling PDSCH in the user control channel search space.

Various methods can be used in NR to reduce the complexity of the user equipment, for example, by limiting the number of layers the user equipment supports MIMO, or the maximum bandwidth the user equipment uses for traffic transmission, etc. In NR, one device that limits capacity is called RedCap device. RedCap devices support the use of a maximum of 20MHz of radio frequency and baseband bandwidth on the FR1 band, which can greatly reduce the implementation cost or complexity of the user device for application scenarios that do not require particularly high capabilities, compared to a maximum of 100MHz bandwidth required by non-RedCap devices. We consider that the bandwidth and capability required by RedCap devices can be further reduced, for example, the total bandwidth of the user device for PDSCH or PUSCH transmission is further limited to be no more than 5MHz on the FR1 band, so that it can further reduce complexity under the condition of meeting the requirement of a certain maximum rate, and can coexist with RedCap devices or non-RedCap devices in the same network, thereby improving the permeability of the user device and improving the network value. Such a further capacity limiting device is herein denoted eRedCap device.

To better ensure coexistence of eRedCap devices and other devices, the radio frequency module of eRedCap may support a bandwidth not less than 20MHz, and the size of the post-FFT buffer for downlink reception is also not less than 20 MHz. Thus, the network may configure a maximum bandwidth of 20MHz BWP for eRedCap devices for data transmission for eRedCap devices, and the network transmits data for eRedCap using a total bandwidth of no more than 5 MHz.

Since eRedCap uses smaller bandwidth for data transmission, the number of RBs used is smaller, which may lead to degradation of transmission performance. For example, in typical scenarios of eRedCap equipment applications, indoor, factory-like environments, etc., the channel delay spread is typically low and the frequency diversity gain obtainable with a bandwidth of 5MHz is small. It is thus possible to consider transmitting data using different bandwidths on a BWP bandwidth greater than 5MHz, for example, using a frequency hopping method, to maintain coverage. In addition, the use of different bandwidth transmission not only provides frequency diversity gain, but also can average the interference of the whole 20MHz bandwidth BWP, which is beneficial to the receiving performance of the user equipment.

In order to enhance the reliability of PDSCH transmission, the network may employ a repeated transmission manner to enhance the reception performance of PDSCH, that is, the ue receives PDSCH transmitting the same data block in consecutive slots according to the configuration and DCI. eRedCap user equipment may support both frequency hopping and PDSCH repeated transmissions. In this way, eRedCap ue uses smaller transmission bandwidth to transmit in larger BWP, so as to obtain larger gain, meet the requirement of receiving performance, or make the number of repetition needed under the same requirement of receiving performance smaller, occupy less resources, etc.

Embodiments of the present invention will be specifically described below. Hereinafter, unless explicitly stated, the term user equipment or user equipment refers to such eRedCap user equipment.

Hereinafter, an outline of an embodiment of the method of determining a downlink frequency domain resource of the present invention will be described in detail with reference to the accompanying drawings. The methods provided by the following embodiments may be applied to eRedCap user equipment as described above.

As shown in fig. 1, in 101, the ue determines the downlink resource allocation used based on higher layer parameters of the network configuration.

In 103, the user equipment determines whether there are downlink frequency domain hopping parameters in the higher layer parameters of the network configuration. The downlink frequency domain hopping parameter is a parameter related to the execution of the hopping. For example, the downlink frequency domain hopping parameters may include hopping frequency offset parameters. The frequency hopping offset parameter represents an offset of a frequency hopping start position, which represents a start position of downlink frequency domain resources for transmitting PDSCH on each of consecutive slots in case of applying frequency hopping, with respect to a frequency domain resource start position indicated by DCI.

In 105, the user equipment determines whether there are PDSCH repetition parameters in higher layer parameters of the network configuration indicating that the same symbol allocation is applied over several consecutive slots. In other words, the PDSCH repetition parameter indicates that the PDSCH is repeated over multiple consecutive slots. Here, the present invention is not limited to the execution order of the operations in 103 and 105 described above.

In 107, when the downlink frequency domain hopping parameter and the PDSCH repetition parameter exist in the higher layer parameters configured by the network, the ue determines downlink frequency domain resources for transmitting PDSCH on the consecutive slots indicated by the PDSCH repetition parameter using the downlink frequency domain hopping parameter and the frequency domain resource allocation parameter corresponding to the determined downlink resource allocation manner.

Before performing the operation of 107 above, it may also be determined whether to apply frequency hopping on PDSCH transmission opportunities scheduled by the DCI according to a frequency hopping identification in the DCI to determine downlink frequency domain resources. If it is determined that frequency hopping is not applied to determine the downlink frequency domain resources, then no downlink frequency domain frequency hopping parameter is applied when determining downlink frequency domain resources on PDSCH transmission opportunities scheduled or activated by the DCI.

As shown in fig. 2, in 201, in the case that a downlink frequency domain hopping parameter exists in a higher layer parameter, a hopping frequency offset parameter for a continuous slot is selected from hopping frequency offset parameters configured in a higher layer according to an instruction in DCI. The same frequency hopping offset parameter may be configured for each of the consecutive time slots, in which case a plurality of values as the frequency hopping offset parameter may be included in the higher layer parameters. The user equipment may select one from a plurality of values as a frequency hopping offset parameter for each slot according to the indication in the DCI.

In another example, the frequency hopping offset parameters may be different for each of the consecutive time slots. In this case, a plurality of candidate frequency hopping parameter sets including a plurality of frequency hopping parameter for each of the consecutive slots may be configured in the higher layer parameter, and selection parameters regarding selection of a target frequency hopping resource set from the plurality of candidate frequency hopping parameter sets are indicated in the DCI. At this time, the user equipment may select a group from a plurality of candidate frequency hopping offset parameter groups as a target frequency hopping resource group based on the selection parameter indicated by DCI, and determine each frequency hopping offset parameter in the target frequency hopping resource group as a frequency hopping offset parameter of a corresponding slot in consecutive slots.

At 203, a frequency domain resource start position configured in the higher layer parameter is determined according to a field in the DCI for indicating the frequency domain resource.

At 205, a frequency hopping start location on each of the consecutive time slots is determined based on the frequency hopping offset parameter and the frequency domain resource start location for the consecutive time slots.

At 207, downlink frequency domain resources for transmitting PDSCH on each of the consecutive slots are determined based on the hopping start locations.

Fig. 3 is a flowchart of another example of a downlink frequency domain resource determining process in a method of determining downlink frequency domain resources according to an embodiment of the present invention. The example shown in fig. 3 is a case where the downlink frequency domain resource allocation is indicated using the Type1 scheme described in embodiment 1 described later. In the case of using Type1, that is, in the case of using the resource indication value RIV to indicate the scheduled downlink frequency domain resource, if the higher layer parameter includes the downlink frequency domain hopping parameter, the higher layer parameter is used to indicate the downlink frequency domain resourceN _{DL_hop} high order bits are used in the bits to indicate the frequency hopping offset parameter, N _RB is the size of the downlink active BWP.

At this time, as shown in fig. 3, at 301, the user equipment selects one of the frequency hopping offset parameter values configured by the higher layer parameters as the frequency hopping offset parameter for the consecutive slots according to N _{DL_hop} higher bits in the DCI.

At 303, the user equipment starts a position for downlink frequency domain resources for each of consecutive slots according to a slot number of the slot or a sequence number of a PDSCH transmission opportunity transmitted on the slot.

Then, at 305, the user equipment determines downlink frequency domain resources for transmitting PDSCH on each of the consecutive slots based on the frequency hopping offset parameter and the starting position of the downlink frequency domain resources for each of the slots.

The network may include a PDSCH repetition parameter for indicating that the scheduled PDSCH is repeated over a plurality of consecutive slots in a PDSCH time domain resource allocation parameter configured for the user equipment. At this time, the downlink frequency domain resource may be determined for a plurality of consecutive slots indicated by the PDSCH repetition parameter. In this case, the procedure of determining the downlink frequency domain resource may include the following operations.

In 401, the user equipment determines a frequency hopping offset parameter for each of the consecutive slots according to a TCI mapping mode that maps a TCI state indicated by the DCI to a PDSCH transmitted on each of the consecutive slots, the frequency hopping offset parameter representing an offset of a frequency hopping start position relative to a frequency domain resource start position indicated by the DCI, the frequency hopping start position representing a start position of a downlink frequency domain resource for transmitting the PDSCH on each of the slots in case of applying frequency hopping.

At 403, the user equipment determines a frequency domain resource start position configured in the higher layer parameter according to a field in the DCI for indicating the frequency domain resource.

At 405, the user equipment determines the frequency hopping start location on each of the consecutive time slots based on the frequency hopping offset parameter and the frequency domain resource start location for the consecutive time slots.

At 407, the user equipment transmits downlink frequency domain resources for PDSCH on each of the consecutive slots based on the frequency hopping start location.

Examples are provided below to describe embodiments of the invention in more detail.

[ Example 1]

In NR systems, different bandwidth limiting methods may be used for the shared channel and the control channel by limiting the bandwidth of eRedCap devices to reduce the complexity of the user equipment. For example, the control channel may transmit data using RBs having a total bandwidth not greater than the number of PRBs corresponding to 20MHz, and the shared channel may transmit data using RBs having a total bandwidth not greater than the number of PRBs corresponding to 5 MHz. Typically, control channels are used for transmission of smaller or shorter physical layer control signaling, while shared channels are used for larger or more complex data transmission. Thus, the user equipment can greatly reduce the implementation complexity when transmitting data in the shared channel by using smaller bandwidth, and meanwhile, the control channel can not reduce the performance due to the limitation of the bandwidth, and can keep good compatibility with the existing network configuration.

The network may use FDRA (Frequency domain resource assignment) field in the DCI to indicate the frequency domain resource allocation of PDSCH scheduled by the DCI. There are various downlink frequency domain resource allocation methods, for example, downlink resource allocation method 0 (which may be denoted as type 0), downlink resource allocation method 1 (which may be denoted as type 1), and so on. type0 indicates the allocated resources using a bitmap manner, and the downlink BWP bandwidth is divided into N _RBG RBGs. When the frequency domain resource indication scheme of type0 is used, N _RBG bits are used in FDRA to indicate whether each RBG on BWP is scheduled. For example, a bit value of 1 indicates that the relevant RBG is scheduled, and a bit value of 0 indicates that the relevant RBG is not scheduled. When the frequency domain resource indication scheme of type0 is used, the scheduled resource is indicated using the scheme RIV (resource indication value). The user equipment may determine a frequency domain start position RB _start and a consecutive number of RBs L _RB of the scheduled resource on BWP by the RIV value indicated in FDRA, and determine the frequency domain resource scheduled on BWP for PDSCH transmission. The ue may determine the downlink resource allocation manner used according to the higher layer parameters. For example, the higher layer parameter resourceAllocation indicates type1, the UE determines FDRA the frequency domain resource allocation indicated using type 1. The higher layer parameter resourceAllocation may also indicate dynamic handover, where the UE further determines from the indication in the DCI that the DCI is to use type0 or type1 to determine the frequency domain resources of the scheduled PDSCH, e.g., from the MSB of FDRA, and when the bit is 0, uses the resource allocation of type 0; this bit is 1, and the type1 resource allocation scheme is used. A field of a corresponding number of bits is used in the DCI to indicate FDRA in different resource allocation manners. For example, when the frequency domain resource indication is performed using the resource allocation type0, the number of bits of FDRA field in DCI is N _RBG. When the frequency domain resource indication is performed by using the resource allocation type1, the bit number of FDRA field in DCI isWhere N _RB is the size of the downlink active BWP. When the higher layer configuration resource allocation mode is dynamic switching, the bit number of FDRA domains isThe highest bit indicates which resource allocation mode is used, and the remaining bits indicate the frequency domain resource allocation indicated by the application-related resource allocation mode.

PDSCH transmission of DL SPS scheduling is also supported in NR. The network configures the relevant parameters through SPS-config and activates or deactivates the SPS transmissions using DC 1. The sps-config contains a period parameter according to which a terminal may receive PDSCH in slots over multiple periods.

Optionally, the ue determines the frequency domain resource used for PDSCH transmission according to a higher layer parameter configured by the network, where the higher layer parameter is a downlink frequency domain hopping parameter. For example, the user equipment may be configured with downlink frequency domain hopping parameters, which include several frequency domain offset parameters, e.g., denoted as frequency-hopping-list. When determining the downlink resource allocation mode of the PDSCH usage typel of the DCI scheduling and configuring the downlink frequency domain hopping parameter by the higher layer, the user equipment determines the frequency domain resource used by the PDSCH transmission scheduled or activated by the DCI using the related hopping parameter and the frequency domain resource parameter indicated by FDRA.

Optionally, the ue further determines whether to apply a downlink frequency hopping parameter in the higher layer parameters on the PDSCH scheduled by the DCI to determine the frequency domain resource according to a hopping identifier in the DCI, for example, the identifier is hopping-flag. For example, when the higher layer is configured with a frequency hopping parameter frequency-hopping-list, a hopping-flag of 1 bit is used in the DCI to indicate whether frequency hopping is applied. When hopping-flag indicating bit is 1, the high-layer frequency hopping parameter is applied to the PDSCH transmission opportunity scheduled by DCI to determine the frequency domain resource, and when hopping-flag indicating bit is 0, the high-layer frequency hopping parameter is not applied to the PDSCH transmission opportunity scheduled or activated by DCI to determine the frequency domain resource.

As a specific example, when the user equipment receives PDSCH scheduled by DCI format 1_1 or 1_2 in PDCCH with CRC scrambled by C-RNTI, MCS-C-RNTI or CS-RNTI and ndi=1, if the network configures PDSCH repetition parameters for the user equipment by means of higher layer PDSCH configuration parameters PDSCH-config, e.g. denoted as PDSCH-AggregationFactor parameters, the same symbol allocation will be applied to several consecutive slots indicated by PDSCH-AggregationFactor, the transmission on these slots may be referred to as several PDSCH transmission opportunities of DCI scheduled or one SPS transmission. If the user equipment is further configured with higher layer downlink frequency domain hopping parameters, the user equipment determines frequency domain resources used by the PDSCH transmitters according to the frequency domain resource allocation parameters and the hopping parameters indicated by the DCI on consecutive time slots indicated by PDSCH-AggregationFactor.

As a specific example, the user equipment, when receiving PDSCH scheduled by DCI format 1_1 or 1_2 in PDCCH with CRC scrambled by CS-RNTI and ndi=0; or PDSCH without corresponding PDCCH scheduling using higher layer parameter sps-Config configuration activated by DCI format 1_1 or 1_2, the same symbol allocation will be applied to consecutive slots indicated by PDSCH-Config or PDSCH-AggregationFactor of sps-Config configuration. That is, the user equipment receives PDSCH using the same symbol resources on these consecutive slots. The user equipment determines whether to use the downlink frequency domain hopping parameter to determine the PDSCH frequency domain resource according to the higher layer parameter and/or the indication of the DCI, and determines the used frequency domain resource according to the frequency domain resource allocation parameter and the hopping parameter indicated by the DCI on the continuous time slots with the number indicated by the PDSCH-AggregationFactor.

Optionally, the user equipment selects one frequency domain resource allocation parameter for determining the consecutive time slots from the frequency domain offset parameters configured by the higher layer according to the indication in the DCI.

For example, when the user equipment determines that the size of the activated BWP is smaller than N PRBs, an offset value used for PDSCH scheduled by the DCI is indicated by using 1 bit in the DCI, and the user equipment selects one of two offset parameter values of the higher layer parameter configuration according to the indication in the DCI; when the size of the activated BWP is greater than or equal to N PRBs, an offset parameter value used for PDSCH scheduled by the DCI is indicated by using 2 bits in the DCI, and the user equipment selects one of four offset parameter values of the higher-layer parameter configuration according to the indication in the DCI.

Optionally, the value of N is 51.eRedCap supports a maximum BWP bandwidth of 20MHz. The number of available PRBs is 106 when SCS used on the bandwidth transmits PDSCH at 15kHz according to network requirements when the bandwidth of BWP is 20MHz, and is 51 when SCS used on the bandwidth transmits PDSCH at 30 kHz. Setting N to 51, eRedCapUE also requires only 1 bit in the DCI to indicate frequency hopping when configured with frequency hopping, when SCS is 30 kHz. This allows eRedCap users to reduce the DCI overhead.

Optionally, the value of N is 52. When the BWP bandwidth is 10MHz and the SCS used on the bandwidth transmits PDSCH at 15kHz, the number of available PRBs is 52. Setting N to 52, eRedCapUE also requires only 1 bit in the DCI to indicate frequency hopping when configured to support the typical 10MHz BWP bandwidth. This allows eRedCap users to reduce the DCI overhead.

Alternatively, the value of N is 50. Thus, the user equipment can use the same criterion as the uplink time slot or the time slot frequency hopping, and the design of the user equipment is simplified to a certain extent.

According to the previous method, the user equipment determines PDSCH frequency domain resources using the hopping parameters and also determines fields for hopping indication in the DCI.

Alternatively, when the user equipment determines to use resource allocation type 1 by higher layer configuration or DCI indication and determines to use frequency hopping to determine PDSCH frequency domain resources, the user equipment is used to indicate the frequency domain resourcesOf the bits, N _{DL_hop} high-order bits (MSBs) are used for a sequence number indicating a frequency hopping offset value. Wherein/>M is the number of candidate values in the down frequency domain hopping parameter of the high layer configuration. For example, if the higher layer parameter frequency-hopping-list contains two offset values, then N _{DL_hop} =1, and if the higher layer parameter frequency-hopping-list contains 4 offset values, then N _{DL_hop} =2. The user equipment is based on the remaining/>The bits determine the frequency domain resource start position RB _start,DCI and the RB number L _RB indicated by the DCI.

The user equipment may determine a transmission parameter RB _offset for the PDSCH according to the N _{DL_hop} high-order bit indications in the DCI. For example, the frequency domain offset parameter of the higher layer configuration contains two values, such as frequency-hopping-list= { RB _offset,1,RB_offset,2 }, and the indication corresponding to N _{DL_hop} bits in the DCI is 0, the user equipment selects RB _offset＝RB_offset,1, otherwise RB _offset＝RB_offset,2. Similar approaches apply equally to scenes using more high-level configuration parameters.

The user equipment determines frequency domain resources used for PDSCH transmission in consecutive slots indicated by PDSCH-AggregationFactor based on the determined RBs _offset. For example, PDSCH-AggregationFactor indicates PDSCH transmission of N consecutive slots, and the user equipment determines the number n=0, 1. The RB number L _RB,n is equal to the RB number L _RB indicated in the DCI.

Optionally, the ue determines the starting position of the frequency domain resource according to the slot numbers where PDSCH of the consecutive slots are located. When (when)When PDSCH starts to be located at RB _start,n＝RB_start,DCI, the frequency domain resource on the time slot is equal to the sum of the number of times of/>When the initial position of the frequency domain resource of PDSCH on the time slot isWherein/>The RB _start,DC1 is the RB start position indicated in DC1 for the slot number for PDSCH transmission scheduled or activated for DCI. /(I)The number of PRBs of downlink BWP scheduled for DCI. mod is a modulo operation.

Optionally, the ue determines the starting position of the frequency domain resource according to the sequence numbers of PDSCH of the consecutive slots. Optionally, when nmod 2=0, the starting position of the frequency domain resource of PDSCH on the time slot is RB _start,n＝RB_start,DCI, and when nmod 2=1, the starting position of the frequency domain resource of PDSCH on the time slot is RB _start,n＝RB_start,DCI Where n=0, 1.

Alternatively, in addition to the above method for determining the frequency domain resource of the PDSCH transmission opportunity, the ue may determine the frequency domain resource allocation parameter for PDSCH on consecutive slots according to a plurality of configuration values of the higher layer parameter. For example, the network configures several frequency domain offset parameters, which are the same as the number of slots indicated by pdsch-AggregationFactor, by the higher layer parameter frequency-hopping-list. The user equipment respectively applies the related frequency domain offset parameters on the continuous time slots indicated by the pdsch-AggregationFactor scheduled by the DCI to determine the frequency domain resource allocation parameters on the corresponding time slots.

For example, the user equipment is configured with PDSCH-AggregationFactor =n4 by the higher layer parameters, that is, the user equipment transmits PDSCH in 4 consecutive slots indicated by PDSCH-AggregationFactor scheduled by DCI. The user equipment is further configured with 4 offset parameters by the higher layer parameters frequency-hopping-list, for example frequency-hopping-list= { RB _offset,0,RB_offset,1,RB_offset,2,RB_offset,3 }, and the user equipment applies PDSCH transmission opportunities on 4 consecutive slots scheduled or activated by DCI, respectively And determining corresponding frequency domain resources, wherein n is the sequence number of the PDSCH transmission opportunity.

Optionally, the user equipment determines the frequency domain resource allocation parameter for determining the consecutive time slots according to the indication of the higher layer parameter in combination with the DCI. For example, the network configures K sets of frequency domain offset parameters by higher layer parameters frequency-hopping-list, each set containing the same number of frequency domain offset parameters as the number of slots indicated by pdsch-AggregationFactor. The user equipment determines a set of PDSCH transmission opportunities to be applied to DCI scheduling according to an indication of ceil (log 2 (K)) in the DCI. The user equipment respectively applies the related frequency domain offset parameters on the continuous time slots indicated by the pdsch-AggregationFactor scheduled by the DCI to determine the frequency domain resource allocation parameters on the corresponding time slots.

For example, the user equipment is configured with PDSCH-AggregationFactor =n4 by the higher layer parameters, that is, the user equipment transmits PDSCH in 4 consecutive slots indicated by PDSCH-AggregationFactor scheduled by DCI. The user equipment is also configured by the higher layer parameters that the k=2 groups contain offset parameter group numbers that can be used with 1 bit indication in the 4 offset parameters frequency-hopping-list＝{{RB_offset,1,0,RB_offset,1,1,RB_offset,1,2,RB_offset,1,3},{RB_offset,2,0,RB_offset,2,1,RB_offset,2,2,RB_offset,2,3}}.DCI. For example, the user equipment selects to use the first set of offset parameters according to the 1-bit indication 0 in the DCI, and the user equipment applies respectively on 4 consecutive slots scheduled by the DCIAnd determining corresponding frequency domain resources, wherein n is the sequence number of the PDSCH transmission opportunity.

Alternatively, when the UE receives PDSCH with CRC scheduled by DCI format 4_1 or 4_2 in the G-RNTI scrambled PDCCH, the same symbols are applied on PDSCH-AggregationFactorMulticast consecutive slots if the UE is configured with PDSCH-AggregationFactorMulticast at PDSCH-Config-Multicast and associated G-RNTI. Or when PDSCH scheduled by DCI format 4_1 or 4_2 is received in PDCCH, CRC is scrambled by G-CS-RNTI, or PDSCH without corresponding PDCCH transmission using sps-Config configuration and activated by DCI format 4_1 or 4_2, the same symbol allocation will be applied to PDSCH-AggregationFactorMulticast consecutive slots. Similar manner as above may apply PDSCH transmissions scheduled or activated by the relevant DCI format 4_1 or 4_2 if the UE is also configured by the higher layers with relevant frequency hopping parameters.

[ Example 2]

The network may configure several PDSCH-TimeDomainResourceAllocation options through higher layer parameters PDSCH-TimeDomainResourceAllocatiolist and use TDRA (time domain resource allocation) fields in the DCI to indicate which PDSCH the DCI is scheduling to use to determine the relevant PDSCH transmission parameters. The PDSCH-TimeDomainResourceAllocation includes a plurality of configuration parameters, for example, k0 is used to indicate the interval between the scheduled PDSCH and the time slot where the DCI is located; a PDSCH containing repetitionNumber for indicating scheduling is repeated over a plurality of slots indicated by repetitionNumber, and so on. When the UE is configured by the network that the higher layer parameter(s) PDSCH-TimeDomainResourceAllocation contain repetitionNumber, the UE may determine one or two TCI states from the code point indicated by the TCI (Transmission Configuration Indication) field in the DCI, and the TDRA field in the DCI indicates one PDSCH-TimeDomainResourceAllocation option containing repetitionNumber, and the DM-RS Port of the same CDM group indicated in the DCI field "Antenna Port(s)": (for simplicity of description, it may be noted that R is repetitionNumber the number of consecutive time slots indicated)

-When the TCI field in the DCI indicates two TCI states, the UE may receive the same Transport Block (TB) on PDSCH transmission opportunities of multiple slots and use the two TCI states in PDSCH transmission opportunities of repetitionNumber indicated number of consecutive slots. If the user equipment is further configured with a downlink frequency domain hopping parameter by the higher layer parameter, the user equipment determines the used frequency domain resource on the R continuous time slot according to the frequency domain resource allocation parameter and the hopping parameter indicated by the DCI.

When the TCI field in the DCI indicates one TCI state, the UE may receive the same TB on PDSCH transmission opportunities of multiple slots and indicate that PDSCH transmission opportunities of a number of consecutive slots use one TCI state at repetitionNumber. If the user equipment is further configured with a downlink frequency domain hopping parameter by the higher layer parameter, the user equipment determines the used frequency domain resource on the R continuous time slot according to the frequency domain resource allocation parameter and the hopping parameter indicated by the DCI.

The user equipment may determine whether to use the frequency hopping parameter and the RB _offset used according to the higher layer parameter and/or the indication of DCI using the method described in embodiment one. An RB _offset value is determined, for example, from the higher layer parameter frequency-hopping-list.

Optionally, the user equipment determines frequency domain resources used for PDSCH transmission in consecutive slots indicated by repetitionNumber according to the determined RBs _offset. For example, when nmod 2=0, the starting position of the frequency domain resource of the PDSCH transmission opportunity on the slot is RB _start,n＝RB_start,DC1, and when nmod 2=1, the starting position of the frequency domain resource of the PDSCH transmission opportunity on the slot isN=0, 1..n is the sequence number of PDSCH opportunities associated with each TCI state.

The user equipment may determine the TCI status used by each PDSCH transmission opportunity from the TCI indication in the DCI. If the TCI field in DC1 indicates two TCI states and the TDRA field in DCI indicates one option, which is PDSCH-TimeDomainResourceAllocation containing repetitionNumber (i.e., where a certain PDSCH-TimeDomainResourceAllocation contains repetitionnumber parameters, the network may configure multiple TimeDomainResourceAllocation and use TDRA to indicate which to use, if TDRA indicates TimeDomainResourceAllocation option containing repetitionnumber, then apply repetititon), and the DCI field "Antenna Port(s)" indicates DM-RS ports in the same CDM group, the user equipment may determine PDSCH transmission opportunities over repetitionNumber parameter values indicating the number of consecutive slots. The first TCI state applies to the first PDSCH transmission opportunity. If the number indicated by repetitionNumber is equal to 2, the second TCI state is applied to the second PDSCH transmission opportunity. If repetitionNumber indicates a number greater than 2, the user equipment may enable one of two modes used for PDSCH transmission by the network configuration higher layer parameters TCIMAPPING: CYCLICMAPPING (cyclic mapping) or sequenticalMapping (sequential mapping).

If CYCLICMAPPING mode is enabled, the first and second PDSCH transmission opportunities apply the first and second TCI states, respectively, and then the same mapping mode is applied to the remaining PDSCH transmission opportunities. If sequenticalMapping mode is enabled, the first TCI state is applied to the first and second PDSCH transmission opportunities and the second TCI is applied to the third and fourth PDSCH transmission opportunities. The same mapping pattern is then applied to the remaining PDSCH transmission opportunities.

Otherwise, i.e., the DCI indicates one TCI state, and the TDRA field in the DCI indicates an option, which is PDSCH-TimeDomainResourceAllocation containing repetitionNumber, all PDSCH opportunities scheduled by the DCI are associated to one TCI state.

Optionally, the ue determines whether to use the hopping parameter and the determined RB _offset according to the higher layer parameter and/or the indication of the DCI, and determines the frequency domain resource used for PDSCH transmission according to the indication of the TCI in the DCI. When the number indicated by repetitionNumber is greater than 2, the user equipment determines the frequency domain resources to be used at the plurality of PDSCH transmitters of the DCI schedule. For example, the user equipment determines that when nmod 2=0, the user equipment determines that the frequency domain resource used by the PDSCH transmission opportunity starts as RB _start,n＝RB_start,DCI, and when nmod 2=1, the user equipment determines that the frequency domain resource used by the PDSCH transmission opportunity starts as Where n=0, 1. N is the number of PDSCH opportunities, counting only PDSCH transmission opportunities associated to the same TCI state. /(I)Is the size of BWP for PDSCH transmission.

Alternatively, if the TCI field in the DCI indicates two TCI states and the number indicated by repetitionNumber is greater than 2, the user equipment determines the frequency domain resources used by the PDSCH transmission opportunity according to TCIMAPPING enabled mode.

For example, if CYCLICMAPPING mode is enabled, the first and second PDSCH transmission opportunities apply RB _start,n＝RB_start,DCI to determine frequency domain resources, n=0, 1, respectively; third and fourth PDSCH transmission opportunities apply respectivelyFrequency domain resources are determined, n=2, 3. /(I)Is the size of BWP for PDSCH transmission. The same pattern is then applied to the remaining PDSCH transmission opportunities. For example, the following formula may be used:

If sequenticalMapping mode is enabled, the first and second PDSCH transmission opportunities apply RB _start,n＝RB_start,DC1 and RB respectively Frequency domain resources are determined and then the same pattern is applied to the remaining PDSCH transmission opportunities. For example, the following formula may be used:

it is also possible to support multi-slot reception when the user equipment is configured to receive multicast traffic.

Alternatively, when the user equipment receives PDSCH scheduled by DCI in PDCCH of G-RNTI or G-CS-RNTI scrambling CRC for Multicast reception, if at least one PDSCH-TimeDomainResourceAllocation including repetitionNumber is in PDSCH-Config-Multicast or PDSCH-Config-Broadcast. When the user configures the downlink frequency hopping parameter by the higher layer, the ue may also determine the frequency domain resources of PDSCH on multiple timeslots according to the similar method above.

[ Example 3]

In NR networks, there are various common signals or channels, such as SSB, etc., transmitted in addition to PDSCH channels transmitted to users. SSBs occupy 20 RBs and 4 symbols and are transmitted in different time-frequency locations using multiple beams. The user equipment may acquire beam information using SSB, implement synchronization, perform RRM measurement, etc., so when SSB overlaps PDSCH, normal transmission of SSB still needs to be guaranteed, and PDSCH may be transmitted in a rate-matched manner to avoid interference to SSB.

ERedCap the user equipment limits the bandwidth used for data transmission, for example, when transmitting unicast PDSCH, its total PRB number is not more than 25 when SCS is used of 15kHz, and its total PRB number is not more than 11 when SCS is used of 30 kHz. Thus if the PDSCH transmitted by eRedCap user equipment overlaps with SSB, then all or most of the scheduled resources will not be available for PDSCH transmission, resulting in reduced performance.

Optionally, the terminal may determine the frequency domain resource parameter to be used according to the coincidence state of the PDSCH transmission and other channels. For example, after the terminal determines the frequency domain resource of the PDSCH using the frequency hopping parameter and the method in the related embodiment, if there is a partial or complete overlap between the PDSCH and the time-frequency resource used by the SSB in one slot, the resource used for PDSCH transmission in the slot may be determined according to the overlap condition. The example user equipment compares the determined number of remaining REs N1 after removing REs overlapping with SSB using the determined resources used by one PDSCH transmission opportunity determined in the previous embodiment with the determined number of remaining REs N2 after removing REs overlapping with SSB when the frequency hopping parameter is not applied. If N1< N2, then RB _start,DC1 and L _RB are used to determine the frequency domain resources of the PDSCH transmission opportunity on the PDSCH transmission opportunity, otherwise RB _start and L _RB are used to determine the frequency domain resources of the PDSCH transmission opportunity.

Alternatively, the terminal may determine to transmit the PDSCH in a sounding manner according to the coincidence state of the PDSCH transmission and other channels. For example, after the terminal determines the frequency domain resource of the PDSCH using the frequency hopping parameter and the method in the related embodiment, if there is a partial or complete overlap between the PDSCH and the time-frequency resource used by the SSB in one slot, in order to reduce the burden of the terminal using different ratematch modes, the sounding mode may be used to determine the resource used by the PDSCH. The terminal determines REs overlapping with SSBs as available and transmits PDSCH using 0 power on these REs. Therefore, the terminal can combine the PDSCH on a plurality of time slots by using smaller decoding complexity, so that a better receiving effect is realized, and the transmission of SSB is not affected.

[ Example 4]

ERedCap the user equipment needs to guarantee coexistence with RedCap users in a network. Due to a further limitation of the bandwidth by eRedCap user equipments, for example, the number of PRBs scheduled in the uplink grant for scheduling msg3 transmissions contained in the Random Access Response (RAR) message cannot exceed the number of PRBs corresponding to 5 MHz. Thus, if the bandwidth of the uplink BWP for the eRedCap user equipment random access is greater than 5MHz, the eRedCap user equipment should notify the network using a specific PRACH preamble so that the network can distinguish the user type and correctly transmit the uplink grant for msg3 transmission. To reduce overhead, eRedCap devices may share initial uplink or downlink BWP for random access with RedCap devices, where eRedCap devices need to determine whether there are associated random access resources based on whether there are associated configurations when the cell supports eRedCap devices. Several sets of random access resources for different characteristics or combinations of characteristics may be configured in the network. For example, a set of random access resources may contain a FeatureCombination configuration parameters. FeatureCombination contain several optional fields, such as redCap, eRedCap, featureA, etc., for identifying different characteristics. If the relevant characteristics field in FeatureCombination is set to true, the RA resource may be used for random access procedures of the user equipment supporting these characteristics.

When a user selects a Random Access (RA) resource set for a random access procedure, the MAC entity should make a relevant decision for each configured 4-step random access resource set and 2-step random access resource set:

1. If redCap of one RA resource set is set to true, then that resource is not considered for the random access procedure, if none of the following conditions are met:

RA for one RedCap application

RA applied for one eRedCap and without random access resource set

ERedCap set as true

2. If eRedCap of one RA resource set is set to true, if the RA is not an RA of eRedCap application (the user is not a eRedCap user), then the resource set is considered not to be used for the random access procedure.

3. If one RA resource set is not configured with the characteristic combination parameter FeatureCombination, the random access resource is not associated with any characteristic.

The eRedCap user can determine the random access resources available for the random access procedure according to the steps and conditions described above. For example, eRedCap devices allow access in a cell, and eRedCap that there is one RA resource set is set to true, then eRedCap devices can select that RA resource set for the random access procedure. If redCap of one RA resource set is set to true in the cell at the same time, eRedCap user does not select the RA resource set for the random access procedure either.

If eRedCap device allows access in the cell and RedCap that there is one RA set of resources is set to true and eRedCap that there is no RA set of resources is set to true, only RedCap or eRedCap devices can select the RA set of resources for the random access procedure.

If eRedCap devices allow access in the cell and none of RedCap or eRedCap of the RA resource sets is set to true, eRedCap the user can select RA resource sets for random access procedures that are not configured with the characteristic combination parameter FeatureCombination.

Next, a user equipment that can perform the method performed by the user equipment described in detail above of the present invention as an embodiment will be described with reference to fig. 5.

Fig. 5 is a block diagram showing a user equipment UE according to the present invention.

As shown in fig. 5, the user equipment UE500 comprises a processor 501 and a memory 502. The processor 501 may include, for example, a microprocessor, microcontroller, embedded processor, or the like. The memory 502 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. The memory 502 has stored thereon program instructions. Which, when executed by the processor 501, may perform the above-described method performed by the user equipment as described in detail herein.

The method and the apparatus involved of the present invention have been described above in connection with preferred embodiments. It will be appreciated by those skilled in the art that the methods shown above are merely exemplary and that the embodiments described above can be combined with one another without contradiction. The method of the present invention is not limited to the steps and sequences shown above. The network nodes and user equipment shown above may comprise further modules, e.g. modules that may be developed or developed in the future that may be used for a base station, MME, or UE, etc. The various identifiers shown above are merely exemplary and are not intended to be limiting, and the present invention is not limited to the specific cells that are examples of such identifiers. Many variations and modifications may be made by one of ordinary skill in the art in light of the teachings of the illustrated embodiments. In addition, the above embodiments may not be limited to the application to the reduced-capability devices, and other devices may also apply the related methods to obtain the corresponding effects if similar requirements, such as performance improvement, etc.

It should be understood that the above-described embodiments of the present invention may be implemented by software, hardware, or a combination of both software and hardware. For example, the various components within the base station and user equipment in the above embodiments may be implemented by a variety of means including, but not limited to: analog 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.

In the present application, the "base station" may refer to a mobile communication data and control switching center with a larger transmitting power and a wider coverage area, including functions of resource allocation scheduling, data receiving and transmitting, etc. "user equipment" may refer to user mobile user equipment including, for example, mobile phones, notebooks, etc., that may communicate wirelessly with a base station or micro base station.

Furthermore, embodiments of the invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is one of the following: has a computer readable medium encoded thereon with computer program logic that, when executed on a computing device, provides relevant operations to implement the above-described aspects of the invention. The computer program logic, when executed on at least one processor of a computing system, causes the processor to perform the operations (methods) described in embodiments of the invention. Such an 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), floppy disk or hard disk, or other a medium such as firmware or microcode on one or more ROM or RAM or PROM chips, or as downloadable software images in one or more modules, shared databases, etc. The software or firmware or such configuration may be installed on a computing device to cause one or more processors in the computing device to perform the techniques described by embodiments of the present invention.

Furthermore, each functional module or individual feature of the base station apparatus and the user equipment used in each of the above embodiments may be implemented or performed by a circuit, typically one or more integrated circuits. Circuits designed to perform the 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, discrete gate or transistor logic, or discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The or each circuit may be configured by digital circuitry or may be configured by logic circuitry. In addition, when advanced technologies capable of replacing the current integrated circuits are presented due to advances in semiconductor technology, the present invention can also use integrated circuits obtained using the advanced technologies.

While the invention has been shown above in connection with the preferred embodiments thereof, it will be understood by those skilled in the art that various modifications, substitutions and changes may be made thereto without departing from the spirit and scope of the invention. Accordingly, the invention should not be limited by the above-described embodiments, but by the following claims and their equivalents.

Claims

1. A method performed by a user equipment of determining downlink frequency domain resources, comprising:

Determining a downlink resource allocation mode based on a high-level parameter of network configuration;

determining whether a downlink frequency domain frequency hopping parameter exists in high-level parameters of network configuration;

determining whether PDSCH repetition parameters indicating the same symbol allocation applied over a plurality of consecutive slots exist in higher layer parameters of the network configuration; and

When the downlink frequency domain frequency hopping parameter and the PDSCH repetition parameter exist in the high-level parameters of the network configuration, determining downlink frequency domain resources for transmitting the PDSCH on the continuous time slot indicated by the PDSCH repetition parameter by using the downlink frequency domain frequency hopping parameter and the frequency domain resource allocation parameter corresponding to the determined downlink resource allocation mode.

2. The method of claim 1, wherein prior to determining the downlink frequency domain resources, the method further comprises:

determining whether to apply frequency hopping on PDSCH transmission opportunities scheduled by DCI to determine the downlink frequency domain resources according to frequency hopping identifications in the DCI; and

If it is determined that frequency hopping is not applied to determine the downlink frequency domain resources, the downlink frequency domain frequency hopping parameter is not applied when determining the downlink frequency domain resources on PDSCH transmission opportunities scheduled or activated by the DCI.

3. The method of claim 1, wherein determining the downlink frequency domain resources comprises:

When any one of the following conditions is satisfied and a downlink frequency domain frequency hopping parameter and the PDSCH repetition parameter exist in a higher layer parameter configured by a network, determining downlink frequency domain resources for transmitting PDSCH on the consecutive time slots indicated by the PDSCH repetition parameter by using the downlink frequency domain frequency hopping parameter and a frequency domain resource allocation parameter corresponding to the determined downlink resource allocation manner:

When receiving a PDSCH scheduled by DCI format 11 or 12 in PDCCH with CRC scrambled by one of C-RNTI, MCS-C-RNTI, or CRC scrambled by CS-RNTI and NDI of 1;

PDSCH scheduled by DCI format 11 or 12 in PDCCH with ndi=0 when CRC is received, scrambled by CS-RNTI;

when receiving PDSCH without corresponding PDCCH scheduling configured by the higher layer parameters activated by DCI format 11 or 12;

When the UE receives PDSCH scheduled by DCI format 41 or 42 in the G-RNTI scrambled PDCCH, if the user equipment is network configured with PDSCH repetition parameters for multicasting and G-RNTI associated with multicasting;

When PDSCH scheduled by DCI format 41 or 42 is received in PDCCH, CRC is scrambled by G-CS-RNTI, or PDSCH without corresponding PDCCH transmission configured using sps-Config and activated by DCI format 41 or 42.

4. The method of claim 1, wherein the downlink frequency domain hopping parameter comprises a hopping frequency offset parameter representing an offset of a hopping starting position from a frequency domain resource starting position indicated by DCI, the hopping starting position representing a starting position of downlink frequency domain resources for transmitting PDSCH on the respective slots with hopping applied, the determining the downlink frequency domain resources comprising:

Under the condition that the downlink frequency domain frequency hopping parameter exists in the high-layer parameter, selecting the frequency hopping frequency offset parameter aiming at the continuous time slot from the frequency hopping frequency offset parameters configured in the high-layer according to the indication in the DCI;

Determining a frequency domain resource starting position configured in the high-level parameter according to a field used for indicating the frequency domain resource in the DCI;

Determining the frequency hopping start position on each of the consecutive time slots based on frequency hopping offset parameters for the consecutive time slots and the frequency domain resource start position; and

Downlink frequency domain resources for transmitting PDSCH on each of the consecutive slots are determined based on the hopping start locations.

5. The method of claim 4, wherein selecting the frequency hopping offset parameter for the consecutive slots from among the frequency hopping offset parameters of the higher layer configuration according to the indication in the DCI comprises:

Determining the bit number of the frequency hopping offset parameter used for indicating the PDSCH scheduled by the DCI according to the comparison result of the BWP size and the preset threshold value indicating the PRB number; and

And selecting one of the frequency hopping offset parameter values configured by the high-level parameters according to the determined bit number as the frequency hopping offset parameter for the continuous time slot.

6. The method of claim 1, wherein, in case of indicating the scheduled downlink frequency domain resources by means of a resource indication value RIV, if the higher layer parameters include downlink frequency domain hopping parameters, then the higher layer parameters are used to indicate the downlink frequency domain resourcesN _{DL_hop} high-order bits of the bits are used to indicate the frequency hopping offset parameter, N _RB is the size of the downlink active BWP,

The process of determining the downlink frequency domain resource includes:

selecting one of the frequency hopping offset parameter values configured by the higher-layer parameters as the frequency hopping offset parameter for the continuous time slot according to the N _{DL_hop} high-order bits in the DCI;

For each time slot in the continuous time slots, according to the time slot number of the time slot or the serial number of the PDSCH transmission opportunity transmitted on the time slot, the starting position of the downlink frequency domain resource for the time slot number or the serial number is aimed; and

And determining downlink frequency domain resources for transmitting PDSCH on each time slot of the continuous time slots based on the frequency hopping offset parameter and the downlink frequency domain resource starting position for each time slot.

7. The method of claim 4, wherein a plurality of candidate frequency hopping parameter sets including a plurality of frequency hopping parameter for each of the consecutive slots, respectively, are configured in the higher layer parameter, and a selection parameter regarding selection of a target frequency hopping resource set from the plurality of candidate frequency hopping parameter sets is indicated in the DCI,

According to the indication in the DCI, selecting the frequency hopping offset parameter for the continuous time slot from the frequency hopping offset parameters configured by a high layer comprises:

And selecting a group from the plurality of candidate frequency hopping frequency offset parameter groups to serve as the target frequency hopping resource group based on the selection parameters indicated by DCI, and determining each frequency hopping frequency offset parameter in the target frequency hopping resource group as the frequency hopping frequency offset parameter of the corresponding time slot in the continuous time slots.

8. The method of claim 1, wherein the method further comprises:

determining the coincidence state of downlink frequency resources for receiving PDSCH and frequency domain resources for other channels; and

And determining a downlink frequency domain resource parameter used by the PDSCH according to the superposition state.

9. The method of claim 1, wherein the downlink frequency domain hopping parameter comprises a hopping frequency offset parameter, and when a PDSCH time domain resource allocation parameter configured by the network for the user equipment includes a PDSCH repetition parameter for indicating that a scheduled PDSCH is repeated over a plurality of consecutive slots, the consecutive slots being a plurality of consecutive slots indicated by the PDSCH repetition parameter, the determining the downlink frequency domain resource comprises:

Determining a frequency hopping offset parameter for each of the consecutive slots according to a TC1 mapping mode that maps a TCI state indicated by DCI to PDSCH transmitted on each of the consecutive slots, the frequency hopping offset parameter representing an offset of a frequency hopping start position, which represents a start position of downlink frequency domain resources for transmitting PDSCH on each of the slots with frequency hopping applied, relative to a frequency domain resource start position indicated by DCI;

Downlink frequency domain resources for transmitting PDSCH on each of the consecutive slots based on the hopping start location.

10. A user equipment, comprising:

A processor; and

A memory in which instructions are stored,

Wherein the instructions, when executed by the processor, perform the method according to any one of claims 1 to 9.