PDSCH Transmission Method, PDSCH Transmission Device, and Communication Device

Abstract

The present application discloses a PDSCH transmission method, device, apparatus, and storage medium, the method including: performing a Physical Downlink Shared Channel (PDSCH) transmission based on related configuration information of a PDCCH when the Physical Downlink Control Channel (PDCCH) transmission occupies one or more transmission occasions and is repeatedly transmitted.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and specifically relates to a PDSCH transmission method, apparatus, device, and storage medium.

Background Art

[0002] PDCCH (Physical Downlink Control Channel) transmission and PDSCH (Physical Downlink Shared Channel) transmission are closely related.

[0003] When enhanced reliable transmission of PDCCH is introduced, for example, when PDCCH is repeatedly transmitted on different CORESETs or different transmission occasions, the transmission of PDSCH scheduled by PDCCH may fail.

[0004] Therefore, a PDSCH transmission method that can adapt when enhanced reliable transmission of PDCCH is introduced to propose is is an urgent problem that needs to be solved.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Embodiments of this application provide a PDSCH transmission method, apparatus, device, and storage medium that can guarantee the scheduling and successful transmission of PDSCH.

Means for Solving the Problems

[0006] According to a first aspect, a communication device executed by provides a PDSCH transmission method, and this method includes performing PDSCH transmission based on relevant configuration information of PDCCH when physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted.

[0007] According to a second aspect, a PDSCH transmission apparatus is provided, which includes a transmission module for performing PDSCH transmission based on related configuration information of PDCCH when physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted.

[0008] According to a third aspect, a communication device is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the method according to the first aspect are realized.

[0009] According to a fourth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method according to the first aspect are realized.

[0010] According to a fifth aspect, a chip is provided, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor runs a communication device program or instruction and is used to realize the method according to the first aspect.

Advantages of the Invention

[0011] In the embodiments of the present application, when physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, different methods are adopted to determine the transmission position of PDSCH based on different related configuration information of PDCCH, and then this PDSCH is scheduled and transmitted, so as to relatively well adapt to the case where the reliable transmission of PDCCH is enhanced, and ensure the success of PDSCH scheduling and transmission.

Brief Description of the Drawings

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Embodiments for Carrying Out the Invention

[0013] The following clearly describes the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0014] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not for describing a specific order or sequence. It should be understood that such terms are interchangeable when appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type and do not limit the number of objects. For example, the first object may be one or more. In addition, "and / or" in the description and claims represents at least one of the connected objects, and the character " / " generally represents that the related objects before and after are in an "or" relationship.

[0015] It should be noted that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be applied to other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are always used interchangeably, and the described technology may be used in the systems and radio technologies mentioned above, or in other systems and radio technologies. The following description describes the New Radio (NR) system for illustrative purposes and uses NR terms in most of the following descriptions, but these technologies may also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems.

[0016] FIG. 1 is a block diagram of a wireless communication system according to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. Here, the terminal 11 may also be referred to as a terminal device or a user equipment (UE). The terminal 11 may be a terminal-side device such as a mobile phone, a tablet personal computer, a laptop computer (or called a notebook computer), a personal digital assistant (PDA), a palm top computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), a wearable device, or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), etc. The wearable device includes a bracelet, earphones, glasses, etc. It should be noted that the embodiments of the present application do not limit the specific type of the terminal 11. The network-side device 12 may be a base station or a core network. Here, the base station may be called a Node B, an evolved Node B, an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS) , home a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting receiving point (TRP), or other suitable terms in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0017] In the following, with reference to the drawings, the PDSCH transmission method and apparatus according to the embodiments of the present application will be described in detail by way of specific embodiments and their application scenarios.

[0018] FIG. 2 is a flowchart of the PDSCH transmission method according to the embodiments of the present application. As shown in FIG. 2, this method includes the following steps.

[0019] Step 200, when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, perform PDSCH transmission based on the relevant configuration information of the PDCCH.

[0020] Specifically, PDCCH (Physical Downlink Control Channel) transmission and PDSCH (Physical Downlink Shared Channel) transmission are closely related. For example, the start position of the time-frequency resource of the PDSCH scheduled by DCI format 1_0 needs to reference the CORESET (Control Resource Set) where the DCI (Downlink Control Information) is located. When there is an overlap collision between the PDCCH and the PDSCH on the time-frequency resource, the PDSCH needs to perform rate matching. When the DMRS (Demodulation Reference Signal) pilot frequency of the PDSCH collides with the CORESET on the time-frequency resource, the DMRS code needs to be moved backward to avoid it, and the PDCCH and PDSCH scheduling need to maintain an interval limit in the time domain.

[0021] However, when enhanced reliable transmission of PDCCH is introduced, for example, when PDCCH is repeatedly transmitted on different CORESETs or different monitoring occasions, the conventional PDSCH scheduling method cannot be applied. Therefore, based on different related configuration information of PDCCH, the transmission position of the physical downlink shared channel PDSCH can be flexibly determined, and the transmission of PDSCH may be performed.

[0022] As can be understood, the monitoring occasion mentioned in this embodiment is for the terminal. Correspondingly, for the network side, it may be described as a transmission occasion.

[0023] As can be understood, in this embodiment, the communication device may be a network-side device. When the communication device is a network-side device and the PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, PDSCH may be transmitted based on the related configuration information of PDCCH.

[0024] As can be understood, in this embodiment, the communication device may be a terminal device. When the communication device is a terminal device and the PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, PDSCH may be received based on the related configuration information of PDCCH.

[0025] In the embodiments of this application, when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, different methods are adopted to determine the transmission position of PDSCH based on different related configuration information of PDCCH, and then this PDSCH is scheduled and transmitted. By doing so, it can better adapt to the case where enhanced reliable transmission of PDCCH is introduced, and ensure the success of PDSCH scheduling and transmission.

[0026] Optionally, based on the related configuration information of the PDCCH, before performing the transmission of the PDSCH, the method further includes: when the PDCCH is configured to be related to a CORESET of multiple different control resource set CORESET IDs, determining the position of the smallest RB in the specified CORESET among the different CORESETS related to the resource block RB start index of the PDSCH, or when the PDCCH is allowed to be configured to be related to only one CORESET ID of a CORESET, further including determining the position of the smallest RB in the CORESET of the one CORESET ID related to the RB start index of the PDSCH, wherein the PDSCH is scheduled by any one common search space type of downlink control information DCI format.

[0027] Specifically, in the NR system, a UE cannot successfully decode the PDCCH without knowing the position of the PDCCH in the frequency domain and the position in the time domain. Therefore, the NR system packages information such as the frequency band occupied by the PDCCH in the frequency domain and the number of OFDM symbols occupied in the time domain into the CORESET, and packages information such as the PDCCH start OFDM symbol number and the PDCCH monitoring period into the search space Search Space. The possible positions of the PDCCH can be determined by the CORESET and the Search Space.

[0028] Specifically, the PDCCH, i.e., the downlink control channel, is mainly used to carry uplink scheduling information and downlink scheduling information. The control information carried on the PDCCH is called DCI (Downlink control information). Since the functions of DCI are relatively numerous, in order to facilitate differentiation, generally DCI is divided into various types. In 5G NR, the PDCCH is mainly responsible for transmitting various important control information of the physical layer, among which the frequency domain scheduling information of the PDSCH is included.

[0029] Specifically, the allocation method in the frequency domain of the PDSCH is divided into two types: Type 0 and Type 1. Type 0 represents non - continuous RB scheduling, and Type 1 represents continuous RB scheduling. For Type 0, since the allocation of frequency domain resources has a certain discreteness, some frequency diversity gains can be obtained. For Type 1, since the frequency domain scheduling resources are characterized by the start RB index and the number of scheduled RBs, the data bit transmission overhead in the PDCCH can be saved.

[0030] Specifically, the scheduling of Type 0 or Type 1 is arranged by the upper - layer parameter resourceAllocation in the PDSCH - Config parameter set. Here, resourceAllocationType0 represents Type 0 scheduling, resourceAllocationType1 represents Type 1 scheduling, and dynamicSwitch represents dynamic scheduling. Specifically, it indicates whether the scheduling type is Type 0 or Type 1 based on a 1 - bit field in the DCI.

[0031] Note that when the PDSCH is scheduled by DCI 1-0, the frequency domain resource scheduling type can be configured as only Type1, which can save the DCI bit overhead of the PDCCH.

[0032] Specifically, the search space parameter set includes the parameter searchSpaceType, which is used to indicate the search space type and the DCI Format for scheduling. Here, the search space type includes CSS (Common Search Space) or USS (UE Specific Search Space), and the DCI Format includes 0-0, 0-1, 1-0, 1-1, 2-0, 2-1, 2-2, and 2-3.

[0033] Generally speaking, when the PDSCH is scheduled by the DCI format 1_0 of any one common search space type, regardless of which activated bandwidth part (BWP) bandwidth the PDSCH is located on, the starting position of the RB number of the PDSCH is the position of the minimum index RB of the CORESET where this DCI format 1_0 is located, rather than referring to the position of the minimum index RB of the BWP.

[0034] In this embodiment, when enhancing the reliable transmission of the PDCCH and this PDCCH is associated with different CORESET IDs, in order to successfully execute the PDSCH transmission, the minimum RB index corresponding to the CORESET ID associated with the RB index of the scheduled PDSCH may be directly specified.

[0035] For example, based on the relevant configuration information of a certain PDCCH, if it can be determined that this PDCCH is transmitted using the repetition method, different repetition occasions are related to different search spaces, and different search spaces are related to different CORESET IDs, then this PDCCH may be considered to be related to different CORESET IDs. Therefore, the minimum RB index corresponding to the CORESET ID associated with the RB index of the scheduled PDSCH may also be directly specified.

[0036] Therefore, when the PDSCH is scheduled by the PDCCH DCI format1_0 and this PDCCH may be of any one type of common search space, if the network arranges this CSS to be related to multiple CORESETs and different CORESET IDs are arranged for different CORESETs, the starting position of the RB number of the PDSCH may be specified in advance.

[0037] For example, it may be specified that the starting position of the RB number of the PDSCH references the position of the minimum RB in the CORESET with the minimum CORESET ID among the multiple CORESETs related to the PDCCH. For example, it may be specified that the starting position of the RB number of the PDSCH references the position of the minimum RB in all CORESETs related to it.

[0038] Specifically, in order to successfully execute PDSCH transmission, the PDCCH may be allowed to be arranged to be related to a CORESET with only one CORESET ID, and this PDCCH may be of any one type of common search space (CSS), that is, this CSS can only be associated with one CORESET ID. In this case, it can be determined that the RB start index of the PDSCH scheduled by the DCI format of this CSS is related to the position of the smallest RB in the CORESET of this only CORESET ID.

[0039] Optionally, when the PDCCH collides with the time-frequency resource of the PDSCH scheduled thereby, based on the related arrangement information of the PDCCH, before executing the transmission of the PDSCH, the method is to transmit the PDSCH without occupying the collided time-frequency resource, where the time-frequency resource is the time-frequency resource of all collided PDCCH transmission occasions, and all the collided PDCCH transmission occasions are determined by the UE based on the PDCCH transmission occasions successfully detected by the UE according to a preset rule, or when one PDCCH transmission occasion collides with one PDSCH transmission occasion and the TCI state activated by the CORESET related to the PDCCH and the TCI state indicated by the PDSCH transmission occasion are not in the same group, further includes transmitting the PDSCH on the collided time-frequency resource.

[0040] Specifically, generally speaking, when a collision / overlap occurs between the time-frequency resource allocated to one PDSCH and the PDCCH scheduling this PDSCH, the time-frequency resource where the overlap occurs is not used for PDSCH transmission.

[0041] In this embodiment, when the PDCCH adopts enhanced reliable transmission, the UE may be able to perform reception and detection of the PDSCH as long as it successfully detects some of the PDCCHs. Since there may be an overlap between the time-frequency resources occupied by the PDCCHs not successfully detected and the PDSCH, in order to successfully perform PDSCH transmission, it is necessary to further determine the time-frequency resources occupied by the PDCCHs not successfully detected.

[0042] Therefore, in this embodiment, based on a preset rule and based on the successfully detected PDCCH transmission occasions, all the collided PDCCH transmission occasions can be determined, and further all the collided time-frequency resources can be determined, that is, it is not necessary to occupy all the collided time-frequency resources when transmitting the PDSCH.

[0043] For example, when the PDCCH schedules the PDSCH transmission, here, this PDCCH may be composed of M (M>=1) candidate PDCCHs, that is, PDCCH candidates, and this PDSCH may be composed of N (N>=1) PDSCH transmission occasions for transmitting the same TB block. When the UE identifies M1 (M>=M1>=1) PDCCH transmission candidates and an overlap occurs between the time-frequency resources occupied by the M1 PDCCHs and N1 (N>=N1>=1) PDSCH transmission occasions for transmitting the same TB block, this PDSCH transmission does not occupy the overlapping time-frequency resources.

[0044] Here, the UE can identify M1 PDCCH transmission candidates based on a preset rule only by the M2 (M2<M1) successfully detected PDCCH transmission candidates.

[0045] Here, the network side may notify the UE of this preset rule in advance through signaling transmission.

[0046] Specifically, if the network side does not notify the UE of this preset rule in advance or this rule is not preset, the PDSCH may adopt a specific transmission method, and in this specific transmission method, the PDSCH does not overlap with the PDCCH candidates that schedule this PDSCH.

[0047] Specifically, the PDCCH adopts repetition transmission and occupies different transmission occasions, but the correlation of these transmission occasions is not notified to the UE. Just by successfully detecting one of these transmission occasions, the UE cannot know the positions of other transmission occasions and cannot know whether other transmission occasions collide with the PDSCH. Therefore, to avoid this problem, the network side may transmit while ensuring that there is no collision between the PDCCH and the scheduled PDSCH when transmitting.

[0048] Specifically, in this embodiment, when one PDCCH transmission occasion collides with one PDSCH transmission occasion and the TCI (Transmission Configuration Indicator) state activated by the CORESET related to the PDCCH and the TCI state indicated by the PDSCH transmission occasion are not in the same group, the PDSCH may be transmitted on the collided time-frequency resource.

[0049] Specifically, in this embodiment, the arrangement of the group is pre-indicated for the PDSCH by higher layer parameters.

[0050] For example, the UE communicates with two base stations or two TRPs, where one PDCCH transmission occasion is transmitted on the first TRP and one PDSCH transmission occasion is transmitted on the second TRP. The base station may notify a TCI state group that it may ignore interference between transmission signals associated with different TCI states within the group. In this way, when the UE receives the PDCCH, it can determine that it may ignore interference from the PDSCH on the collision resource, and when the UE receives the PDSCH, it can determine that it may ignore interference from the PDCCH on the collision resource. Therefore, it is not necessary to perform an avoidance action between the two, that is, the PDSCH may transmit a PDSCH signal on the collision time-frequency resource.

[0051] Optionally, the preset rule is determined based on the association relationship between the successfully detected PDCCH transmission occasion and all collided PDCCH transmission occasions, and the association relationship is determined based on the associated allocation information of the PDCCH.

[0052] Specifically, the preset rule may be obtained by the UE based on the associated allocation of the PDCCH. Specifically, it is the association relationship between the successfully detected PDCCH transmission occasion and all collided PDCCH transmission occasions, and based on this association relationship, all collided PDCCH transmission occasions can also be determined based on the successfully detected PDCCH transmission occasion.

[0053] Optionally, when the PDSCH scheduled by the PDCCH is in the first mapping method, based on the associated allocation information of the PDCCH, before performing the transmission of the PDSCH, the method when the first start OFDM symbol of the PDCCH is not located after the first start OFDM symbol of the PDSCH, scheduling the PDSCH, or Scheduling the PDSCH when the first starting OFDM symbol of the last transmission occasion occupied in the time domain by the PDCCH is not located after the first starting OFDM symbol of the PDSCH, or further comprising scheduling the PDSCH when a preset gap satisfies the capabilities reported by the UE.

[0054] Specifically, the PDSCH time domain resource allocation parameter PDSCH-TimeDomainResourceAllocation is carried in the RRC signaling PDSCH-Config and PDSCH-ConfigCommon. There are mainly three parameters, k0, mappingType, and startSymbolAndLength. Here, K0 represents the offset slot size between the slot where the current DCI is located and the slot where the indicated PDSCH is located. mappingType indicates that the adopted allocation type is typeA or typeB, and startSymbolAndLength indicates a SLIV value, and based on this value, the starting OFDM symbol position S of the slot where the PDSCH is located and the occupancy of the continuous OFDM symbols L can be inferred.

[0055] Specifically, FIG. 3 is one of the schematic diagrams of the OFDM symbol arrangement of the PDCCH and PDSCH according to the embodiment of the present application, and FIG. 4 is the other of the schematic diagrams of the OFDM symbol arrangement of the PDCCH and PDSCH according to the embodiment of the present application. As shown in FIGS. 3 and 4, when it is determined that the PDSCH scheduled by the PDCCH is in the first mapping method based on the related configuration information of the PDCCH, it is necessary to ensure that the first starting OFDM symbol of the PDCCH is not located after at least the first starting OFDM symbol of the PDSCH.

[0056] FIG. 5 is the third of the schematic diagrams of the OFDM symbol arrangements of PDCCH and PDSCH according to the embodiment of the present application. When the first PDCCH repetition is introduced by the TDM time division method, as shown in FIG. 5, it can be guaranteed that the first PDCCH repetition does not locate after at least the first starting OFDM symbol of the PDSCH, but it cannot be guaranteed for the second PDCCH repetition and the scheduled PDSCH.

[0057] Therefore, in this embodiment, in order to successfully execute the PDSCH transmission, when it satisfies that the first starting OFDM symbol of the PDCCH does not locate after the first starting OFDM symbol of the PDSCH, the transmission and scheduling of the PDCCH and the PDSCH may be set to be realizable, or when it satisfies that the first starting OFDM symbol of the last transmission occasion occupied in the time domain by the PDCCH does not locate after the first starting OFDM symbol of the PDSCH, the transmission and scheduling of the PDCCH and the PDSCH may be set to be realizable, or when it satisfies that the preset gap is used to satisfy the ability reported by the UE, the transmission and scheduling of the PDCCH and the PDSCH may be set to be realizable.

[0058] In this embodiment, the first mapping method may be a type B mapping method.

[0059] For example, when the PDSCH scheduled by the PDCCH is a type B mapping method, this PDCCH may be composed of M (M>=1) PDCCH candidates, and this PDSCH may be composed of N (N>=1) PDSCH transmission occasions that transmit the same TB block.

[0060] When ensuring that the first starting OFDM symbol of this PDCCH is not located after at least the first starting OFDM symbol of this PDSCH, it may be set to enable the transmission and scheduling of PDCCH and PDSCH.

[0061] Furthermore, ensure that the first starting OFDM symbol of the last monitoring occasion occupied by this PDCCH in the time domain is not located after at least the first starting OFDM symbol of this PDSCH, and it may be set to enable the transmission and scheduling of PDCCH and PDSCH.

[0062] Furthermore, an overlap in the time superposition occurs between one PDSCH transmission occasion and two PDCCH transmission occasions, and one preset gap that satisfies the capabilities reported by the UE may be set to enable the transmission and scheduling of PDCCH and PDSCH.

[0063] Optionally, the preset gap is the interval between two PDCCH transmission occasions, or the preset gap is the interval between a PDSCH transmission occasion and the second PDCCH transmission occasion.

[0064] Specifically, the preset gap may be the interval between two PDCCH transmission occasions. For example, it is the gap between the last OFDM symbol occupied by the first PDCCH transmission occasion and the first OFDM symbol occupied by the second PDCCH transmission occasion. Specifically, the preset gap may be the interval between a PDSCH transmission occasion and the second PDCCH transmission occasion. For example, it is the gap between the first OFDM symbol occupied by a PDSCH transmission occasion and the first OFDM symbol occupied by a second PDCCH transmission occasion.

[0065] Optionally, when any one of the front-loaded DMRSs in a PDSCH transmission occasion included in the PDSCH scheduled by the PDCCH collides with any one of the CORESETs, based on the related configuration information of the PDCCH, before performing the transmission of the PDSCH, the method includes: moving the front-loaded DMRS backward until the front-loaded DMRS no longer collides with any of the CORESETs, or when the index of the CORESET pool where the CORESET that collided with the front-loaded DMRS is located is different from the index of the CORESET pool of the CORESET related to the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS, not moving the front-loaded DMRS backward, or when the TCI state activated by the CORESET that collided with the front-loaded DMRS and the TCI state activated by the CORESET related to the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS are not in the same group, or when the TCI state activated by the CORESET that collided with the front-loaded DMRS and the TCI state indicated by the PDSCH transmission occasion of the front-loaded DMRS are not in the same group, not moving the front-loaded DMRS backward, otherwise, further including moving the front-loaded DMRS backward until the front-loaded DMRS no longer collides with any of the CORESETs.

[0066] Generally speaking, when the front-loaded DMRS arranged in the PDSCH, that is, the front-loaded DM-RS collides with any one of the CORESETs arranged for this UE, in order to successfully execute the PDSCH transmission, the front-loaded DM-RS code may be moved backward until it no longer collides with any CORESET.

[0067] In this embodiment, if the TCI state (TCI state) related to the front-loaded DM-RS and the TCI state related to the CORESET are not in a QCL relationship, or when the mutual interference between the two is very small, the front-loaded DM-RS may or may not be moved.

[0068] Specifically, the front-loaded DMRS may be directly moved backward until it no longer collides with any CORESET. Specifically, when the index of the CORESET pool arranged in the CORESET that collides with the front-loaded DMRS is different from the index of the CORESET pool of the CORESET related to the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS, the front-loaded DMRS may not be moved backward. Specifically, when the TCI state activated by the CORESET that collides with the front-loaded DMRS and the TCI state activated by the CORESET related to the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS are not in the same group, or when the TCI state activated by the CORESET that collides with the front-loaded DMRS and the TCI state indicated by the PDSCH transmission occasion of the front-loaded DMRS are not in the same group, the front-loaded DMRS may not be moved backward; otherwise, the front-loaded DMRS may be moved backward until it no longer collides with any CORESET.

[0069] For example, when the PDCCH schedules one PDSCH transmission, here, this PDSCH may be composed of N (N>=1) PDSCH transmission occasions that transmit the same TB block. When the front-loaded DMRS in some PDSCH transmission occasions collides with the CORESET where it is located, this front-loaded DMRS may be shifted backward until it no longer collides with the CORESET.

[0070] Furthermore, when the CORESET pool index of the CORESET where this front-loaded DMRS collides is different from the CORESET pool index of the CORESET related to the PDCCH of this front-loaded DMRS's PDSCH transmission occasion, this front-loaded DMRS may not need to be shifted backward.

[0071] Furthermore, when the TCI state activated by the CORESET where this front-loaded DMRS collides and the TCI state activated by the CORESET related to the PDCCH that schedules this front-loaded DMRS's PDSCH transmission occasion are not located within one group, or when the TCI state indicated by this front-loaded DMRS's PDSCH transmission occasion is not located within one group, this front-loaded DMRS may not need to be shifted backward. Otherwise, this front-loaded DMRS may be shifted backward until it no longer collides with the CORESET.

[0072] Optionally, after moving the front-loaded DMRS backward as described above, Further including moving an additional DMRS corresponding to the front-loaded DMRS backward, wherein the front-loaded DMRS maintains the same interval as the corresponding additional DMRS.

[0073] Specifically, when moving the front-loaded DMRS, i.e., the front loaded DMRS, backward, the corresponding additional DMRS, i.e., the additional loaded DMRS, may be moved synchronously. Here, when moving the additional DMRS, the interval between the front-loaded DMRS and the corresponding additional DMRS is maintained unchanged.

[0074] Optionally, after moving the additional DMRS corresponding to the front-loaded DMRS backward as described above, if the additional DMRS collides with the CORESET, further including moving the additional DMRS corresponding to the front-loaded DMRS backward until it no longer collides with any CORESET.

[0075] Specifically, when maintaining the interval between the front-loaded DMRS and the corresponding additional DMRS unchanged, when moving the front-loaded DMRS until it no longer collides with any CORESET, the additional DMRS that moves synchronously may collide with the CORESET. Therefore, the additional DMRS may continue to be moved until it no longer collides with any CORESET. In this process, the front-loaded DMRS may not need to be moved.

[0076] Optionally, after moving the additional DMRS corresponding to the front-loaded DMRS backward as described above, if the additional DMRS moves beyond the allocated time domain symbols of the PDSCH, further including discarding the additional DMRS.

[0077] Specifically, when maintaining the interval between the front-loaded DMRS and the corresponding additional DMRS unchanged, when moving the front-loaded DMRS until it no longer collides with any CORESET, there is a risk that the additional DMRS that moves synchronously may move beyond the allocated time domain symbols of the PDSCH. Therefore, this additional DMRS beyond the allocated time domain symbols of the PDSCH may be directly discarded.

[0078] In the embodiments of the present application, when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, different methods are adopted to determine the transmission position of the PDSCH based on different related configuration information of the PDCCH, and then the PDSCH is scheduled and transmitted. By doing so, it can better adapt to the case where the reliable transmission of the PDCCH is enhanced, and ensure the success of the scheduling and transmission of the PDSCH.

[0079] It should be noted that for the PDSCH transmission method according to the embodiments of the present application, the execution entity may be a PDSCH transmission device, or a control module for executing the PDSCH transmission method in this PDSCH transmission device. In the embodiments of the present application, taking the PDSCH transmission device executing the PDSCH transmission method as an example, the PDSCH transmission device according to the embodiments of the present application is described.

[0080] FIG. 6 is a schematic structural diagram of a PDSCH transmission device according to an embodiment of the present application. As shown in FIG. 6, this device includes a transmission module 610, where The transmission module 610 is used to execute the transmission of the PDSCH based on the related configuration information of the PDCCH when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted.

[0081] Specifically, when the PDSCH transmission device repeatedly transmits while the PDCCH transmission occupies one or more transmission occasions, the transmission module 610 executes the transmission of the physical downlink shared channel PDSCH based on the related allocation information of the PDCCH.

[0082] In the embodiments of the present application, when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, different methods are adopted to determine the transmission position of the PDSCH based on different related allocation information of the PDCCH, and further, by scheduling and transmitting this PDSCH, it can better adapt to the case where the reliable transmission of the PDCCH is enhanced, and ensure the success of the scheduling and transmission of the PDSCH.

[0083] Optionally, the device a first determination module for determining the position of the minimum RB in the specified CORESET in the different CORESET related to the RB start index of the PDSCH when the PDCCH is arranged to be related to the CORESETs of a plurality of different control resource set CORESET IDs, or further includes a second determination module for determining the position of the minimum RB in the CORESET of the one CORESET ID related to the RB start index of the PDSCH when the PDCCH is allowed to be arranged to be related to the CORESET of only one CORESET ID, Here, the PDSCH is scheduled by any one of the downlink control information DCI formats of the common search space type.

[0084] Optionally, when the PDCCH collides with the time-frequency resource of the PDSCH scheduled thereby, the device A first transmission module for transmitting the PDSCH without occupying conflicting time-frequency resources, where the time-frequency resources are the time-frequency resources of all conflicting PDCCH transmission occasions, and all the conflicting PDCCH transmission occasions are determined by the UE based on the PDCCH transmission occasions successfully detected by the UE according to a preset rule, or further includes a second transmission module for transmitting the PDSCH on the conflicting time-frequency resources when one PDCCH transmission occasion conflicts with one PDSCH transmission occasion and the TCI state activated by the CORESET related to the PDCCH and the TCI state indicated by the PDSCH transmission occasion are not in the same group.

[0085] Optionally, the preset rule is determined based on the association relationship between the successfully detected PDCCH transmission occasion and all the conflicting PDCCH transmission occasions, and the association relationship is determined based on the related configuration information of the PDCCH.

[0086] Optionally, when the PDSCH scheduled by the PDCCH is in the first mapping method, the device includes a first scheduling module for scheduling the PDSCH when the first start OFDM symbol of the PDCCH is not located after the first start OFDM symbol of the PDSCH, or includes a second scheduling module for scheduling the PDSCH when the first start OFDM symbol of the last transmission occasion occupied by the PDCCH in the time domain is not located after the first start OFDM symbol of the PDSCH, or further includes a third scheduling module for scheduling the PDSCH when a preset gap meets the capabilities reported by the UE.

[0087] Optionally, the preset gap is the interval between two PDCCH transmission occasions, or the preset gap is the interval between a PDSCH transmission occasion and a second PDCCH transmission occasion.

[0088] Optionally, when any one of the front-loaded DMRSs in a PDSCH transmission occasion included in the PDSCH scheduled by the PDCCH collides with any one of the CORESETs, the device a first moving module for moving the front-loaded DMRS backward until the front-loaded DMRS no longer collides with any CORESET, or a second moving module for not moving the front-loaded DMRS backward when the index of the CORESET pool where the CORESET that collided with the front-loaded DMRS is located is different from the index of the CORESET pool of the CORESET related to the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS, or when the TCI state activated by the CORESET that collided with the front-loaded DMRS and the TCI state activated by the CORESET related to the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS are not in one group, or when the TCI state activated by the CORESET that collided with the front-loaded DMRS and the TCI state indicated by the PDSCH transmission occasion of the front-loaded DMRS are not in one group, not moving the front-loaded DMRS backward, otherwise, further including a third moving module for moving the front-loaded DMRS backward until the front-loaded DMRS no longer collides with any CORESET.

[0089] Optionally, the device After moving the front-loaded DMRS backward, it further includes a fourth moving module for moving an additional DMRS corresponding to the front-loaded DMRS backward, where the front-loaded DMRS maintains the same interval as the corresponding additional DMRS.

[0090] Optionally, the apparatus After moving the additional DMRS corresponding to the front-loaded DMRS backward, if the additional DMRS collides with the CORESET, it further includes a fifth moving module for moving the additional DMRS corresponding to the front-loaded DMRS backward until it no longer collides with any CORESET.

[0091] Optionally, the apparatus After moving the additional DMRS corresponding to the front-loaded DMRS backward, if the additional DMRS moves beyond the allocated time domain symbols of the PDSCH, it further includes a discarding module for discarding the additional DMRS.

[0092] In the embodiments of the present application, when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, different methods are adopted to determine the transmission position of the PDSCH based on different associated configuration information of the PDCCH, and further, by scheduling and transmitting this PDSCH, it can better adapt to the case where the reliable transmission of the PDCCH is enhanced, and can guarantee the success of the scheduling and transmission of the PDSCH.

[0093] The PDSCH transmission device in the embodiments of this application may be a device, or may be a component, integrated circuit, or chip in a terminal. This device may be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal may include, but is not limited to, the types of terminal 11 listed above. The non-mobile terminal may be a server, a Network Attached Storage (NAS), a personal computer (PC), a television (TV), a deposit and payment machine, or a self-service machine, etc. The embodiments of this application are not specifically limited.

[0094] The PDSCH transmission device in the embodiments of this application may be a device having an operating system. This operating system may be an Android (registered trademark) operating system, an iOS operating system, or other possible operating systems. The embodiments of this application are not specifically limited.

[0095] The PDSCH transmission device according to the embodiments of this application can implement each process realized by the method embodiments in FIGS. 2 to 5 and achieve the same technical effects. To avoid repetition of the description, it will not be further described here.

[0096] Optionally, FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in FIG. 7, the communication device 700 includes a processor 701, a memory 702, and a program or instruction stored in the memory 702 and executable on the processor 701. For example, when the communication device 700 is a terminal, when this program or instruction is executed by the processor 701, each process of the embodiment of the transmission method of the synchronization signal block can be realized, and the same technical effect can be achieved. When the communication device 700 is a network-side device, when this program or instruction is executed by the processor 701, each process of the embodiment of the PUSCH transmission method can be realized, and the same technical effect can be achieved. To avoid repetition of the description, it will not be described further here.

[0097] FIG. 8 is a schematic hardware structure diagram of a network-side device according to an embodiment of the present application.

[0098] As shown in FIG. 8, this network-side device 800 includes an antenna 801, a radio frequency device 802, and a baseband device 803. The antenna 801 and the radio frequency device 802 are connected. In the uplink direction, the radio frequency device 802 receives information via the antenna 801 and transmits the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes the information to be transmitted, transmits it to the radio frequency device 802, and the radio frequency device 802 transmits the received information after processing via the antenna 801.

[0099] The above frequency band processing device may be located in the baseband device 803. In the above embodiments, the method executed by the network-side device may be realized in the baseband device 803. This baseband device 803 includes a processor 804 and a memory 805.

[0100] The baseband device 803 may include, for example, at least one baseband board, on which a plurality of chips are installed. As shown in FIG. 8, one of the chips is, for example, the processor 804, which is connected to the memory 805, calls a program in the memory 805, and executes the network-side device operations shown in the embodiments of the above method.

[0101] This baseband device 803 may further include a network interface 806, which is used for information exchange with the radio frequency device 802. This interface is, for example, a common public radio interface (abbreviated as CPRI).

[0102] Specifically, the network-side device in the embodiments of the present application further includes instructions or programs stored in the memory 805 and executable on the processor 804. The processor 804 calls the instructions or programs in the memory 805, executes the methods executed by the respective modules shown in FIG. 6, and can achieve the same technical effects. To avoid repetition of the description, it will not be further described herein.

[0103] FIG. 9 is a schematic diagram of the hardware structure of a terminal according to an embodiment of the present application.

[0104] This terminal 900 includes, but is not limited to, components such as a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910.

[0105] As would be understood by those skilled in the art, the terminal 900 may further include a power source (e.g., a battery) for supplying power to each component. The power source may be logically connected to the processor 910 by a power management system, whereby functions such as charge and discharge management and power consumption management can be realized by the power management system. The terminal structure shown in FIG. 9 does not constitute a limitation on the terminal. The terminal may include more or fewer components than those shown, or a combination of some components, or a different arrangement of components, which will not be further described herein.

[0106] It should be understood that in the embodiments of the present application, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042. The graphics processing unit 9041 processes the image data of a still image or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be arranged in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 907 includes a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. The other input devices 9072 may include a physical keyboard, function keys (e.g., volume control buttons, switch buttons, etc.), a trackball, a mouse, an operation lever, etc., but are not limited thereto, and will not be further described herein.

[0107] In the embodiments of the present application, after receiving the downlink data from the network-side device, the radio frequency unit 901 causes the processor 910 to process it, and also transmits the uplink data to the network-side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0108] Memory 909 may be used to store software programs or instructions and various data. Memory 909 may mainly include a program or instruction storage area and a data storage area. Here, the program or instruction storage area can store an operating system, application programs or instructions required for at least one function (for example, a voice playback function, an image playback function, etc.). Note that Memory 909 may include a high-speed random access memory and may also include a non-volatile memory. Here, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. For example, it may be at least one magnetic disk memory device, a flash memory device, or other non-volatile solid-state memory devices.

[0109] Processor 910 may include one or more processing units. Optionally, Processor 910 may integrate an application processor and a modem processor. Here, the application processor mainly processes an operating system, a user interface, and application programs or instructions, etc., and the modem processor mainly processes wireless communications, for example, a baseband processor. As can be understood, the above modem processor may not be integrated into Processor 910.

[0110] Here, when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, Processor 910 is used to execute the transmission of PDSCH based on the relevant configuration information of PDCCH.

[0111] In the embodiments of the present application, when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, different methods are adopted to determine the transmission position of the PDSCH based on different related configuration information of the PDCCH, and further, by scheduling and transmitting this PDSCH, when the enhancement of the reliable transmission of the PDCCH is introduced, it can adapt relatively well to ensure the scheduling and successful transmission of the PDSCH.

[0112] Optionally, the processor further when the PDCCH is arranged to be related to a CORESET of a plurality of different control resource sets CORESET ID, determines the position of the minimum RB in the designated CORESET in the different CORESET related to the resource block RB start index of the PDSCH, or when the PDCCH is allowed to be arranged to be related to only one CORESET ID of the CORESET, is used to determine the position of the minimum RB in the CORESET of the one CORESET ID related to the RB start index of the PDSCH, wherein the PDSCH is scheduled by any one of the common search space type downlink control information DCI format.

[0113] Optionally, the processor further, when the PDCCH collides with the time-frequency resource of the PDSCH scheduled thereby, transmits the PDSCH without occupying the collided time-frequency resource, wherein the time-frequency resource is the time-frequency resource of all the collided PDCCH transmission occasions, and all the collided PDCCH transmission occasions are determined by the UE based on the PDCCH transmission occasions successfully detected by the UE according to a preset rule, or When one PDCCH transmission occasion collides with one PDSCH transmission occasion, and the TCI state activated by the CORESET associated with the PDCCH and the TCI state indicated by the PDSCH transmission occasion are not within the same group, it is used to transmit the PDSCH on the collided time-frequency resources.

[0114] Optionally, the preset rule is determined based on the association relationship between the successfully detected PDCCH transmission occasion and all collided PDCCH transmission occasions, and the association relationship is determined based on the associated configuration information of the PDCCH.

[0115] Optionally, when the PDSCH scheduled by the PDCCH is in the first mapping method, and when the first start OFDM symbol of the PDCCH is not located after the first start OFDM symbol of the PDSCH, the processor schedules the PDSCH, or when the first start OFDM symbol of the last transmission occasion occupied by the PDCCH in the time domain is not located after the first start OFDM symbol of the PDSCH, the processor schedules the PDSCH, or when a preset gap meets the capabilities reported by the UE, it is used to schedule the PDSCH.

[0116] Optionally, the preset gap is the interval between two PDCCH transmission occasions, or the preset gap is the interval between the PDSCH transmission occasion and the second PDCCH transmission occasion.

[0117] Optionally, the processor further moves the front-loaded DMRS backward until the front-loaded DMRS no longer collides with any CORESET when any one of the front-loaded DMRSs in the PDSCH transmission occasion included in the PDSCH scheduled by the PDCCH collides with any one of the CORESETs, or when the index of the CORESET pool where the CORESET that collided with the front-loaded DMRS is located is different from the index of the CORESET pool of the CORESET associated with the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS, the front-loaded DMRS is not moved backward, or when the TCI state activated by the CORESET that collided with the front-loaded DMRS and the TCI state activated by the CORESET associated with the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS are not within one group, or when the TCI state activated by the CORESET that collided with the front-loaded DMRS and the TCI state indicated by the PDSCH transmission occasion of the front-loaded DMRS are not within one group, the front-loaded DMRS is not moved backward; otherwise, it is used to move the front-loaded DMRS backward until the front-loaded DMRS no longer collides with any CORESET.

[0118] Optionally, the processor is further used to move the additional DMRS corresponding to the front-loaded DMRS backward after moving the front-loaded DMRS backward, where the front-loaded DMRS maintains the same interval as the corresponding additional DMRS.

[0119] Optionally, the processor is further used to move the additional DMRS corresponding to the front-loaded DMRS backward, and if the additional DMRS collides with the CORESET after the movement, move the additional DMRS corresponding to the front-loaded DMRS backward until it no longer collides with any CORESET.

[0120] Optionally, the processor is further used to discard the additional DMRS if the additional DMRS moves beyond the allocated time domain symbols of the PDSCH after moving the additional DMRS corresponding to the front-loaded DMRS backward.

[0121] In the embodiments of the present application, when the physical downlink control channel PDCCH transmission occupies one or more transmission occasions and is repeatedly transmitted, different methods are adopted to determine the transmission position of the PDSCH based on different related configuration information of the PDCCH, and then the PDSCH is scheduled and transmitted. By doing so, when the enhanced reliable transmission of the PDCCH is introduced, it can better adapt and ensure the success of the scheduling and transmission of the PDSCH.

[0122] The embodiments of the present application further provide a readable storage medium, on which a program or instruction is stored. When this program or instruction is executed by a processor, each process of the embodiment of the above PDSCH transmission method is realized, and the same technical effect can be achieved. To avoid repeated description, it will not be described further here.

[0123] Here, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0124] An embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, the processor runs a program or instruction of a network-side device, and is used to implement each process of the embodiment of the above PDSCH transmission method, and the same technical effect can be achieved. To avoid repetition of description, it will not be described further here.

[0125] It should be understood that the chip referred to in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a chip system, or a system-on-chip.

[0126] It should be noted that in this specification, the term "including", "comprising" or any other variation thereof is intended to cover non-exclusive "including", whereby a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article or device. In the case of no further limitation, for an element limited by the phrase "comprising one...", it is not excluded that there are other same elements in the process, method, article or device comprising this element. It should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to executing functions in the order illustrated or discussed, and may include executing functions in a substantially simultaneous manner or in a reverse order based on the related functions. For example, a method described in a procedure different from that described can be executed, and various steps can be added, omitted or combined. Also, features described with reference to some examples can be combined in other examples.

[0127] As can be clearly understood by those skilled in the art from the description of the above embodiments, the method of the above embodiments can be implemented in the form of software and the necessary general-purpose hardware platform. Of course, it may also be implemented by hardware, but in many cases, the former is a more preferred embodiment. Based on such an understanding, the technical solution of the present application may, in essence, be embodied in the form of a software product even if the part that contributes to the prior art. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the embodiments of the present application.

[0128] The above has described the embodiments of the present application in conjunction with the drawings, but the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can, based on the suggestion of the present application, perform many forms without departing from the spirit and scope of the claims of the present application, and all of them belong to the protection scope of the present application.

[0129] Cross-reference to related applications This application claims the priority of a Chinese patent application filed with the National Intellectual Property Administration on October 23, 2020, with an application number of 202011149238.2 and an application title of "PDSCH Transmission Method, Apparatus, Device, and Storage Medium", and all of its content is incorporated herein by reference.

Claims

1. A method for physical downlink shared channel PDSCH transmission executed by a communication device, comprising: when a physical downlink control channel PDCCH is arranged to be related to CORESETs of a plurality of different control resource sets CORESET ID, determining that a resource block RB start index of the PDSCH is related to a position of a minimum RB in a designated CORESET among the different CORESETs, wherein the designated CORESET is the one with the minimum CORESET ID among a plurality of CORESETs related to the PDCCH; when PDCCH transmission occupies a plurality of transmission occasions and is repeatedly transmitted, executing the transmission of the PDSCH based on related arrangement information of the PDCCH; when the PDSCH scheduled by the PDCCH is in a first mapping method and the first start OFDM symbol of the last transmission occasion among the plurality of transmission occasions occupied by the PDCCH in the time domain is not located after the first start OFDM symbol of the PDSCH, scheduling the PDSCH; A method for physical downlink shared channel PDSCH transmission.

2. The PDSCH transmission method according to claim 1, wherein the PDSCH is scheduled by any one common search space type of downlink control information DCI format.

3. When the PDCCH collides with the time-frequency resource of the PDSCH scheduled thereby, before executing the transmission of the PDSCH based on the related arrangement information of the PDCCH, the PDSCH transmission method further comprises: Transmitting the PDSCH without occupying the conflicting time-frequency resources, where the time-frequency resources are the time-frequency resources of all the conflicting PDCCH transmission occasions, and all the conflicting PDCCH transmission occasions are determined by the UE based on the PDCCH transmission occasions that are successfully detected by the UE according to a preset rule, the preset rule being determined based on the correlation between the successfully detected PDCCH transmission occasions and all the conflicting PDCCH transmission occasions, and the correlation being determined based on the related configuration information of the PDCCH, further comprising the method for transmitting a PDSCH according to claim 1.

4. When any one of the front-loaded DMRSs in a PDSCH transmission occasion included in the PDSCH scheduled by the PDCCH collides with any one of the CORESETs, before executing the transmission of the PDSCH based on the related configuration information of the PDCCH, the method for transmitting a PDSCH is as follows: Moving the front-loaded DMRS backward until the front-loaded DMRS no longer collides with any of the CORESETs, or When the index of the CORESET pool where the CORESET colliding with the front-loaded DMRS is located is different from the index of the CORESET pool of the CORESET related to the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS, not moving the front-loaded DMRS backward, or When the TCI state activated by the CORESET that collided with the front-loaded DMRS and the TCI state activated by the CORESET related to the PDCCH that schedules the PDSCH transmission occasion of the front-loaded DMRS are not within one group, or when the TCI state activated by the CORESET that collided with the front-loaded DMRS and the transmission configuration indication TCI state indicated by the PDSCH transmission occasion of the front-loaded DMRS are not within one group, the method further includes not moving the front-loaded DMRS backward, or moving the front-loaded DMRS backward until the front-loaded DMRS no longer collides with any CORESET. The PDSCH transmission method according to claim 1.

5. After moving the front-loaded DMRS backward as described above, The method further includes moving an additional DMRS corresponding to the front-loaded DMRS backward, where the front-loaded DMRS maintains the same interval as the corresponding additional DMRS. The PDSCH transmission method according to claim 4.

6. After moving the additional DMRS corresponding to the front-loaded DMRS backward as described above, When the additional DMRS collides with the CORESET, the method further includes moving the additional DMRS corresponding to the front-loaded DMRS backward until it no longer collides with any CORESET, Or When the additional DMRS moves beyond the set time domain symbol of the PDSCH, the method further includes discarding the additional DMRS. The PDSCH transmission method according to claim 5.

7. A PDSCH transmission apparatus, When the physical downlink control channel PDCCH is arranged to be related to CORESETs with a plurality of different control resource set CORESET IDs, a first determination module for determining that the resource block RB start index of the PDSCH is related to the position of the minimum RB in the designated CORESET among the different CORESETs, where the designated CORESET is the one with the smallest CORESET ID among the plurality of CORESETs related to the PDCCH, and a first determination module ​ a transmission module for performing transmission of the PDSCH according to related configuration information of the PDCCH when the PDCCH transmission occupies multiple transmission occasions and is repeatedly transmitted; The PDSCH is scheduled when the PDSCH scheduled by the PDCCH is a first mapping scheme and a first start OFDM symbol of a last transmission occasion among the plurality of transmission occasions occupied in the time domain by the PDCCH is not located after a first start OFDM symbol of the PDSCH. PDSCH transmission device.

8. The PDSCH transmission device according to claim 7 , wherein the PDSCH is scheduled according to a downlink control information (DCI) format of any one of common search space types.

9. When the PDCCH collides with the time-frequency resource of the PDSCH scheduled thereby, the PDSCH transmission device:

8. The PDSCH transmission device of claim 7, further comprising: a first transmission module for transmitting the PDSCH without occupying conflicting time-frequency resources, the time-frequency resources being time-frequency resources of all conflicting PDCCH transmission occasions, the all conflicting PDCCH transmission occasions being determined by the UE based on PDCCH transmission occasions successfully detected by the UE based on a preset rule, the preset rule being determined based on an association relationship between the successfully detected PDCCH transmission occasions and all conflicting PDCCH transmission occasions, the association relationship being determined based on associated configuration information of the PDCCH.

10. A communications device comprising a processor, a memory, and a program or instructions stored in the memory and operable on the processor, the communications device implementing the steps of the PDSCH transmission method according to any one of claims 1 to 6 when the program or instructions are executed by the processor.

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