CN112738889B

CN112738889B - Frequency domain resource indication method and device

Info

Publication number: CN112738889B
Application number: CN201911030392.5A
Authority: CN
Inventors: 李岩; 金婧; 王飞; 郑毅; 王菡凝; 王启星
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2023-04-07
Anticipated expiration: 2039-10-28
Also published as: WO2021082900A1; CN112738889A

Abstract

A method and a device for indicating frequency domain resources are provided, the method comprises: and sending downlink control information to a terminal, wherein the downlink control information carries frequency domain resource indication information of L PDSCHs, and L is an integer greater than or equal to 1. According to the method and the device for indicating the frequency domain resources, which are provided by the embodiment of the invention, the frequency domain resource indication information of L PDSCHs is carried in the downlink control information, so that the frequency domain resource indication of the PDSCHs in a Multi-TRP scene is realized. In addition, the embodiment of the invention also realizes the mapping relation between a plurality of TCI states activated by the downlink control information and a plurality of PDSCHs.

Description

Frequency domain resource indication method and device

Technical Field

The invention relates to the technical field of mobile communication, in particular to a method and equipment for indicating frequency domain resources.

Background

The new air interface of 5G will support three application scenarios, namely enhanced mobile broadband (eMBB), mass machine type communication (mtc), and ultra-high reliable low-latency communication (URLLC). For URLLC, it features high reliability and low delay, usually up to 99.999% reliability, and delay as low as within 1 ms. The main applications of URLLC include: industrial applications and controls, traffic safety and controls, remote manufacturing, remote training, remote surgery, and the like. For example, internet of vehicles is one of the main applications of URLLC, and there is a high demand for reliability of information transmission.

Currently, in a Single-transmission-point (Single-TRP) operating mode, frequency domain resources of a Physical Downlink Shared Channel (PDSCH) may be discontinuously distributed (corresponding to a PDSCH Resource allocation Type 0, i.e., a Resource Type 0) or continuously distributed (corresponding to a PDSCH Resource allocation Type 1, i.e., a Resource Type 1). A frequency domain resource indication mode of a Physical Downlink Shared Channel (PDSCH) sent by a transmission point indicates according to different PDSCH resource allocation types, specifically:

when the PDSCH Resource allocation Type is Type 0 (Resource Type 0), the PDSCH frequency domain resources are non-contiguously distributed, and at this time, the PDSCH frequency domain resources can be indicated in the form of a bitmap (bitmap) by N _ RBG bits (bits), for example, 10010011;

when the PDSCH Resource allocation Type is Type 1 (Resource Type 1), the PDSCH frequency domain resources are continuously distributed, and this time, the PDSCH Resource allocation Type can be changed according to the Resource Type

A single bit indication.

In the above, N _ RBG represents the total number of RBGs allocated to the terminal by the network side,

indicates the total number of RBs allocated to the terminal by the network side.

In order to enhance the reliability and robustness of transmission, the prior art proposes a Multi-transmission point (Multi-TRP) transmission technique. For transmission of Multi-TRP, the same Transport Block (TB) may be sent from at least 2 different transmission points (TRP), as shown in fig. 1. To support soft combining at the receiving end, different redundancy versions may be used for these repeated transport blocks. In addition, to further enhance the reliability of the transmission, these repeated transport blocks may be scheduled by repeated physical downlink control channels.

Currently, no specific solution has been provided for the frequency domain resource indication manner of each PDSCH in the Multi-TRP scenario.

Disclosure of Invention

At least one embodiment of the present invention provides a method, a terminal, and a network device for indicating frequency domain resources, which implement frequency domain resource indication of a PDSCH in a Multi-TRP scenario.

According to an aspect of the present invention, at least one embodiment provides a method for indicating frequency domain resources, which is applied to a network device, and includes:

and sending downlink control information to a terminal, wherein the downlink control information carries frequency domain resource indication information of L PDSCHs, and L is an integer greater than or equal to 1.

Optionally, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes L first bit groups with a length of N _ RBGs, where the L first bit groups are in one-to-one correspondence with the L PDSCHs and are used to indicate the L PDSCH frequency domain resources in a bit bitmap manner, where the N _ RBGs are the total number of RBGs allocated to the terminal by the network side.

Optionally, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, where the L sub-bit groups correspond to the L PDSCHs one to one and are used to indicate L PDSCH frequency domain resources, where N _ RBG is the total number of RBGs allocated to the terminal by the network side.

Optionally, the L sub-bit groups are configured to indicate L PDSCH frequency domain resources in a bitmap manner, and each bit corresponds to L RBGs;

or, each bit in the second bit group corresponds to an RBG one-to-one, and each sub-bit group includes the number of bits of RBG

The N _ RBG is the total number of RBGs distributed to the terminal by the network side;

or, each bit in the second bit group corresponds to an RBG one to one, wherein the length of each sub-bit group is determined according to first resource allocation information, and the correspondence between different values of the first resource allocation information and the length allocation proportion of the sub-bit group is agreed in advance;

or, each bit in the second bit group corresponds to an RBG one to one, wherein the length of each sub-bit group is determined according to second resource allocation information, and a corresponding relationship between different values of the second resource allocation information and a length allocation proportion of the sub-bit group is pre-configured.

Optionally, when the length of each sub-bit group is determined according to the first resource allocation information, the method further includes: sending the first resource allocation information to a terminal through RRC signaling or downlink control information;

when the length of each sub-bit group is determined according to the second resource allocation information, the method further includes: sending different values of the second resource allocation information to the terminal through RRC signaling; and sending the second resource allocation information to the terminal through the downlink control information.

Optionally, when the PDSCH resource allocation type is type 1, the frequency domain resource indication information includes:

l third bit groups, wherein the third bit groups correspond to the L PDSCHs one by one, and the L third bit groups correspond to frequency domain resources of the L PDSCHs; wherein the content of the first and second substances,

the length of each third bit group is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

alternatively, the first and second electrodes may be,

the length of the third bit group corresponding to the xth PDSCH is:

wherein x is an integer greater than or equal to 1;

wherein the content of the first and second substances,

Optionally, the downlink control information further carries TCI status indication information for indicating L TCI statuses corresponding to the L PDSCH, wherein,

the L TCI states indicated by the TCI state indication information correspond to the L PDSCHs indicated by the frequency domain resource indication information one by one according to a preset sequence;

or, the frequency domain resource indication information further includes correspondence indication information of correspondence between the L PDSCH frequency domain resources and the L TCI states, and different values of the correspondence indication information are used to indicate different pre-configured or pre-agreed correspondence.

According to another aspect of the present invention, at least one embodiment provides a method for indicating frequency domain resources, which is applied to a terminal, and includes:

receiving downlink control information sent by network equipment, wherein the downlink control information carries frequency domain resource indication information of L PDSCHs, and L is an integer greater than or equal to 1;

and receiving the L PDSCHs according to the frequency domain resource indication information.

Optionally, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes L first bit groups with a length of N _ RBGs, where the L first bit groups are in one-to-one correspondence with the L PDSCHs and are used to indicate the L PDSCH frequency domain resources in a bit bitmap manner, where the N _ RBGs are the total number of RBGs allocated to the terminal by the network side. .

or, each bit in the second bit group corresponds to an RBG one to one, and each sub-bit group includes the number of bits of RBG

Optionally, when the length of each sub-bit group is determined according to the first resource allocation information, the method further includes: receiving the first resource allocation information sent by the network equipment through RRC signaling or downlink control information; determining the length of each sub-bit group in the second bit group and the frequency domain resource position of the PDSCH of each transmission point according to the first resource allocation information;

when the length of each sub-bit group is determined according to the second resource allocation information, the method further includes: receiving different values of the second resource allocation information sent by the network equipment through RRC signaling; receiving the second resource allocation information sent by the network equipment through downlink control information; and determining the length of each sub-bit group in the second bit group and the frequency domain resource position of the PDSCH of each transmission point according to the value of the second resource allocation information.

the length of each third bit group is:

alternatively, the first and second electrodes may be,

the length of the third bit group corresponding to the xth PDSCH is:

/>

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

wherein x is an integer greater than or equal to 1;

wherein the content of the first and second substances,

Optionally, the downlink control information further carries TCI status indication information for indicating L TCI statuses corresponding to the L PDSCHs, wherein,

or, the frequency domain resource indication information further includes correspondence indication information of correspondence between the L PDSCH frequency domain resources and the L TCI states, where different values of the correspondence indication information are used to indicate different pre-configured or pre-agreed correspondence;

the method further comprises the following steps:

determining the TCI state corresponding to the PDSCH of each transmission point according to the TCI state indication information;

and determining the receiving beam of the PDSCH of each transmission point according to the TCI state corresponding to the PDSCH of each transmission point.

According to another aspect of the present invention, at least one embodiment provides a network device, including:

a downlink control information sending module, configured to send downlink control information to a terminal, where the downlink control information carries frequency domain resource indication information of L PDSCHs, and L is an integer greater than or equal to 1.

In accordance with another aspect of the present invention, at least one embodiment provides a network device comprising a transceiver and a processor, wherein,

the transceiver is configured to send downlink control information to a terminal, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1.

According to another aspect of the present invention, at least one embodiment provides a terminal including:

a downlink control information receiving module, configured to receive downlink control information sent by a network device, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1;

a PDSCH receiving module, configured to receive the L PDSCHs according to the frequency domain resource indication information.

In accordance with another aspect of the present invention, at least one embodiment provides a terminal comprising a transceiver and a processor, wherein,

the transceiver is configured to receive downlink control information sent by a network device, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1;

the processor is configured to receive the L PDSCHs according to the frequency domain resource indication information.

According to another aspect of the present invention, at least one embodiment provides a communication apparatus comprising: a processor, a memory and a program stored on said memory and executable on said processor, said program when executed by said processor implementing the steps of the method of indicating frequency domain resources as described above.

According to another aspect of the invention, at least one embodiment provides a computer-readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of the method as described above.

Compared with the prior art, the frequency domain resource indication method and the device provided by the embodiment of the invention realize the frequency domain resource indication of the PDSCH in a Multi-TRP scene by carrying the frequency domain resource indication information of L PDSCHs in the downlink control information. In addition, the embodiment of the invention also realizes the mapping relation between a plurality of TCI states activated by the downlink control information and PDSCHs sent by a plurality of TRPs and indicates the terminal.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of an application scenario of a Multi-TRP according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a method for indicating frequency domain resources according to an embodiment of the present invention, when the method is applied to a network device;

fig. 3 is a flowchart illustrating a method for indicating frequency domain resources according to an embodiment of the present invention, applied to a terminal side;

fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 5 is another schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 7 is another schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to NR systems and Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various 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" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.21 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A and GSM are described in the literature from an organization named "third Generation Partnership project" (3 rd Generation Partnership project,3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3 GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and two network devices, TRP 12 and TRP 13, respectively. The terminal 11 may also be referred to as a User terminal or a User Equipment (UE), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The TRP may be a Base Station of 5G or later version (e.g., a gNB, a 5G NR NB, etc.) or a Base Station in other communication system (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as 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), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the invention, only the TRP in the NR system is taken as an example, but a specific type of a network device is not limited.

As described in the background art, a frequency domain resource indication scheme for a PDSCH in a Multi-TRP scenario has not been provided in the prior art, and to solve at least one of the above problems, an embodiment of the present invention provides a method for indicating frequency domain resources, which solves a problem how to indicate frequency domain resources of a PDSCH in a Multi-TRP scenario, and referring to fig. 2, the method for indicating frequency domain resources provided in the embodiment of the present invention, when applied to a network device, includes:

step 21, the network device sends Downlink Control Information (DCI) to the terminal, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1.

Here, the terminal operates in a Multi-TRP scenario, communicating with at least two TRPs. The network device may be one of the TRPs, or may be other network-side devices, which is not specifically limited in this embodiment of the present invention.

Through the steps, the network equipment indicates the frequency domain resources of the PDSCH of each transmission point through the DCI, so that the terminal can obtain the frequency domain resource positions of the PDSCH from the DCI and further receive the PDSCH, and the indication of the frequency domain resources of the PDSCH under a Multi-TRP scene is realized.

Optionally, the L PDSCHs are PDSCHs sent by L transmission points.

For different PDSCH resource allocation types, the embodiment of the present invention may adopt an indication manner of frequency domain resources of the corresponding PDSCH, specifically:

when the PDSCH resource allocation type is type 0, the following indication may be adopted:

mode 1: the frequency domain resource indication information has a length of at least L N RBG bits

The frequency domain resource indication information comprises L first bit groups with the length of N _ RBG, wherein the L first bit groups correspond to the L PDSCHs one by one and are used for indicating the L PDSCH frequency domain resources in a bit bitmap mode. Here, the N _ RBG is the total number of RBGs allocated by the network side to the terminal.

That is to say, the frequency domain resource indication information includes L first bit groups with a length of N _ RBG, each first bit group corresponds to one PDSCH and is used for indicating the position of the frequency domain resource of the PDSCH in a bitmap manner, and at this time, each bit in the first bit group corresponds to an RBG allocated to the terminal by the network side one to one.

In order to reduce the length of the frequency domain indication information, the embodiment of the present invention may further indicate the frequency domain resources of the L PDSCHs through a second bit group having a length of N _ RBG. At this time, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, where the L sub-bit groups correspond to the L PDSCH one-to-one and are used to indicate L PDSCH frequency domain resources, where N _ RBG is the total number of RBGs allocated by the network side for the terminal.

Specifically, when the second bit group is used for indicating, the following multiple modes may be included:

mode 2:

each bit in the second bit group corresponds to an RBG one by one, and each sub-bit group comprises the bit number of

And the N _ RBG is the total number of RBGs allocated to the terminal by the network side.

That is to say, bits in the second bit group correspond to the RBGs allocated to the terminal by the network side one to one, and each sub-bit group is used to indicate the frequency domain resources of the corresponding PDSCH, so that each sub-bit group corresponds to a partial RBG in the RBGs allocated to the terminal by the network side, and the frequency domain resources of the corresponding PDSCH can be indicated in the partial RBG in a bit bitmap manner.

For example, taking 2 TRPs as an example, the N _ RBG may be divided into 2 sub-bit groups, each group including

A first sub-group of bits for pre-determining the value of the terminal to be allocated>

Indicating in the RBG that the second sub-group of bits is to be used in the back->

And indicating in each RBG.

Considering that N _ RBG may not be an integer multiple of L, in order to fully utilize the RBG allocated to the terminal, the length of the first L-1 sub-bit groups may be set to be

The last sub-group of bits is of length->

Mode 3:

and the L sub-bit groups in the second bit group are used for indicating L PDSCH frequency domain resources in a bit bitmap mode, and each bit corresponds to L RBGs.

Thus, each sub-group of bits may be indicated in all RGB or part of RBG allocated to the terminal. For example, the terminals may be divided intoThe allocated N _ RBG RBGs are sorted according to the high-low order of the frequency, and the sorted RBG sequence is divided according to L groups to obtain

And when the N _ RBG is not an integral multiple of L, zero padding can be carried out at the tail part of the RBG sequence to ensure that the length of the RBG sequence is an integral multiple of L, so that the last group of RBG also comprises L RBGs. Setting the length of the first L-1 sub-bit group to ∑ or>

The length of the last sub-bit group is

Each bit in each sub-bit group in turn corresponds to a group of RGB in the RBG sequence. Bit length in a group of sub-bits greater than +>

When it is longer than->

And RBGs corresponding to the remaining bits are all empty. />

Still taking 2 TRPs as an example, the frequency domain resources of TRP1 and TRP2 are indicated in the DCI in the form of bitmap by N _ RBG bits, wherein the first N _ RBG/2bits represents the frequency domain resources of TRP1, the second N _ RBG/2bits represents the frequency domain resources of TRP2, and each 1bit represents 2 consecutive RBGs allocated to the terminal, and the consecutive RBGs are adjacent in position in the RBG sequence. Here, it is assumed that N _ RBG is an integer multiple of 2.

Mode 4:

each bit in the second bit group corresponds to an RBG one by one, wherein the length of each sub-bit group is determined according to first resource allocation information, and the corresponding relation between different values of the first resource allocation information and the length allocation proportion of the sub-bit group is agreed in advance.

Here, the bits in the second bit group correspond to RBGs allocated to the terminal by the network side one by one, and each sub-bit group is determined by additional first resource allocation information. When the method 4 is used for indicating, the network device may also send the first resource allocation information to the terminal through RRC signaling or downlink control information.

Still taking 2 TRPs as an example, 2bits of first resource allocation information are agreed in advance, and a value 00 of the first resource allocation information indicates that the first 1/5 bit in the second bit group belongs to TRP1, and a value 01 indicates that the first 2/5 bit belongs to TRP1 … …, so that the length of each sub-bit group can be determined according to the value of the first resource allocation information, and the resource position of each PDSCH can be determined.

Mode 5:

each bit in the second bit group corresponds to an RBG one-to-one, wherein the length of each sub-bit group is determined according to second resource allocation information, and the corresponding relation between different values of the second resource allocation information and the length allocation proportion of the sub-bit group is configured in advance.

When the method 5 is adopted for indication, the network device may further send different values of the second resource allocation information and corresponding length allocation proportions thereof to the terminal through RRC signaling; and sending the second resource allocation information to the terminal through the downlink control information.

The specific indication manner of the frequency domain resource indication information when the PDSCH resource allocation type is type 0 is introduced above. The specific form of the frequency domain resource indication information when the PDSCH resource allocation type is type 1 is further described below:

when the PDSCH resource allocation type is type 1, that is, when PDSCH frequency domain resources allocated to the terminal are continuously distributed, the frequency domain resource indication information includes:

l third bit groups, wherein the L third bit groups correspond to the L PDSCHs one by one, and the L third bit groups correspond to frequency domain resources of the L PDSCHs; wherein the content of the first and second substances,

the length of each third bit group is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

alternatively, the first and second electrodes may be,

the length of the third bit group corresponding to the xth PDSCH is:

wherein x is an integer greater than or equal to 1;

wherein the content of the first and second substances,

The frequency domain resource indication of the PDSCH when the PDSCH resource allocation type is type 0 and 1 is introduced above, respectively. Through the steps, the frequency domain resource indication of the PDSCH in the Multi-TRP scene can be realized.

In addition, the prior art also does not provide an indication scheme for a Transmission Configuration Indication (TCI) status (TCI State) in a Multi-TRP scenario. The following is a description of related background: the characteristic of analog beamforming causes that the network side needs to indicate the beam used for downlink transmission to the terminal through a control signaling, so that the terminal sets a proper receiving beam, which is called beam indication (BeamIndication). For PDSCH, the new air interface (NR) system indicates a downlink Transmission beam through a Transmission Configuration Indication (TCI) field in Downlink Control Information (DCI). The DCI received by the terminal includes TCI states, and each TCI state generally includes a Reference Signal Identification (RSID) and a QCL Type (QCL Type). The terminal finds a corresponding Reference Signal (RS) according to the RSID in the TCI state, where the RS may be an RS measured in the beam management process, and through the measurement process of the beam management, the terminal already knows a receiving beam to be used for receiving the RS (i.e., the corresponding beam), so that the terminal may receive the PDSCH using the receiving beam of the RS.

For Multi-TRP communication scenarios, taking 2 TRPs as an example, the TCI state indication mode for PDSCH transmission in the prior art includes 3 steps: the RRC configures 128 kinds of TCI states at most, the MAC CE activates 8 pairs, 3 bits in the DCI indicate 1 pair of the TCI states, and the 1 pair represents the TCI states corresponding to 2 PDSCHs with 2 TRPs. When the terminal receives 2 TCI states = { TCI state0, TCI state1} indicated by 3 bits in the DCI, it cannot determine the correspondence between the two TCI states and the 2 PDSCHs sent by the received 2 TRPs. In order to solve the above problem, in the embodiment of the present invention, the downlink control information in step 21 of the network device further carries TCI status indication information for indicating L TCI statuses corresponding to the L PDSCHs, and specifically, any one of the following manners may be adopted:

1) The L TCI states indicated by the TCI state indication information correspond to the L PDSCHs indicated by the frequency domain resource indication information one by one according to a preset sequence. For example, according to the sequence of each TCI state in the downlink control information and the sequence of each PDSCH in the downlink control information, each TCI state and PDSCH are in one-to-one correspondence.

2) The frequency domain resource indication information further includes correspondence indication information of correspondence between the L PDSCH frequency domain resources and the L TCI states, and different values of the correspondence indication information are used for indicating different pre-configured or pre-agreed correspondences. For example, still taking 2 TRPs as an example, adding 1bit in the PDSCH frequency domain resource indication field of the DCI to indicate the corresponding TCI state information, for example, 0 indicates that the first TCI state corresponds to the first PDSCH frequency domain resource, and the second TCI state corresponds to the second PDSCH frequency domain resource; 1 indicates that the second TCI state corresponds to the first PDSCH frequency domain resource, and the first TCI state corresponds to the second PDSCH frequency domain resource.

Through the above steps, the embodiment of the present invention may indicate, to the terminal, the mapping relationship between the multiple TCI states activated by the downlink control information and the PDSCH transmitted by the multiple TRPs.

The embodiments of the present invention are described above from the network device side, and are further described below from the terminal side.

Referring to fig. 3, the method for indicating frequency domain resources according to the embodiment of the present invention, when applied to a terminal, includes:

step 31, receiving downlink control information sent by the network device, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1.

And step 32, receiving the L PDSCHs according to the frequency domain resource indication information.

Through the steps, the embodiment of the invention realizes the frequency domain resource indication of the PDSCH in the Multi-TRP scene, so that the terminal can receive the PDSCH sent by each transmission point.

Specifically, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information has multiple indication modes:

mode 1:

the frequency domain resource indication information comprises L first bit groups with the length of N _ RBG, wherein the L first bit groups correspond to the L PDSCH one by one and are used for indicating the L PDSCH frequency domain resources in a bit bitmap mode, and the N _ RBG is the total number of RBG allocated to a terminal by a network side. .

Mode 2:

the frequency domain resource indication information comprises 1 second bit group with the length of N _ RBG, the second bit group comprises L sub-bit groups, the L sub-bit groups correspond to the L PDSCHs one by one and are used for indicating L PDSCH frequency domain resources, and the N _ RBG is the total number of RBGs allocated to the terminal by the network side. Wherein each bit in the second bit group corresponds to an RBG one by one, and each sub-bit group comprises the bit number of

Mode 3:

the frequency domain resource indication information comprises 1 second bit group with the length of N _ RBG, the second bit group comprises L sub-bit groups, the L sub-bit groups correspond to the L PDSCHs one by one and are used for indicating L PDSCH frequency domain resources, and the N _ RBG is the total number of RBGs allocated to the terminal by the network side. Wherein the L sub-bit groups are used to indicate L PDSCH frequency domain resources in a bitmap manner, and each bit corresponds to L RBGs.

Mode 4:

the frequency domain resource indication information comprises 1 second bit group with the length of N _ RBG, the second bit group comprises L sub-bit groups, the L sub-bit groups correspond to the L PDSCHs one by one and are used for indicating L PDSCH frequency domain resources, and the N _ RBG is the total number of RBGs allocated to the terminal by the network side. Each bit in the second bit group corresponds to an RBG one to one, wherein the length of each sub-bit group is determined according to first resource allocation information, and the correspondence between different values of the first resource allocation information and the length allocation proportion of the sub-bit group is predetermined.

At this time, the terminal may further receive the first resource allocation information sent by the network device through RRC signaling or downlink control information; and determining the length of each sub-bit group in the second bit group and the frequency domain resource position of the PDSCH of each transmission point according to the first resource allocation information.

Mode 5:

the frequency domain resource indication information comprises 1 second bit group with the length of N _ RBG, the second bit group comprises L sub-bit groups, the L sub-bit groups correspond to the L PDSCHs one by one and are used for indicating L PDSCH frequency domain resources, and the N _ RBG is the total number of RBGs allocated to the terminal by the network side. Each bit in the second bit group corresponds to an RBG one to one, wherein the length of each sub-bit group is determined according to second resource allocation information, and a corresponding relationship between different values of the second resource allocation information and a length allocation proportion of the sub-bit group is pre-configured.

At this time, the terminal may further receive different values of the second resource allocation information sent by the network device through RRC signaling; receiving the second resource allocation information sent by the network equipment through downlink control information; and determining the length of each sub-bit group in the second bit group and the frequency domain resource position of the PDSCH of each transmission point according to the value of the second resource allocation information.

When the PDSCH resource allocation type is type 1, the frequency domain resource indication information may include:

l third bit groups, wherein the third bit groups correspond to the L PDSCHs one by one, and the L third bit groups correspond to frequency domain resources of the L PDSCHs; wherein, the first and the second end of the pipe are connected with each other,

the length of each third bit group is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

wherein x is an integer greater than or equal to 1;

wherein, the first and the second end of the pipe are connected with each other,

In addition, in this embodiment of the present invention, the downlink control information may further carry TCI status indication information for indicating L TCI statuses corresponding to the L PDSCH, where,

the L TCI states indicated by the TCI state indication information correspond to the L PDSCHs indicated by the frequency domain resource indication information one by one according to a preset sequence; or, the frequency domain resource indication information further includes correspondence indication information of correspondence between the L PDSCH frequency domain resources and the L TCI states, and different values of the correspondence indication information are used to indicate different pre-configured or pre-agreed correspondences.

At this time, the terminal may determine, according to the TCI status indication information, a TCI status corresponding to the PDSCH of each transmission point; and determining a receiving beam of the PDSCH of each transmission point according to the TCI state corresponding to the PDSCH of each transmission point, and further receiving the corresponding PDSCH by using the determined receiving beam.

Various methods of embodiments of the present invention have been described above. An apparatus for carrying out the above method is further provided below.

An embodiment of the present invention provides a network device shown in fig. 4. Referring to fig. 4, a network device 40 according to an embodiment of the present invention includes:

a downlink control information sending module 41, configured to send downlink control information to a terminal, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1.

Here, as an implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes L first bit groups with a length of N _ RBG, where the L first bit groups are in one-to-one correspondence with the L PDSCHs and are used to indicate the L PDSCH frequency domain resources in a bitmap manner, where the N _ RBG is a total number of RBGs allocated to the terminal by the network side.

Here, as another implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, where the L sub-bit groups are in one-to-one correspondence with the L PDSCHs and are used for indicating L PDSCH frequency domain resources, where N _ RBG is a total number of RBGs allocated to the terminal by the network side. The L sub-bit groups are used to indicate L PDSCH frequency domain resources in a bitmap manner, and each bit corresponds to L RBGs.

Here, as another implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with length N _ RBGAnd the second bit group comprises L sub-bit groups, and the L sub-bit groups correspond to the L PDSCHs one to one and are used for indicating L PDSCH frequency domain resources, wherein the N _ RBGs are the total number of RBGs allocated to the terminal by the network side. Each bit in the second bit group corresponds to an RBG one by one, and each sub-bit group comprises the bit number of

Here, as another implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, where the L sub-bit groups are in one-to-one correspondence with L PDSCHs and are used for indicating L PDSCH frequency domain resources, where N _ RBG is a total number of RBGs allocated to the terminal by the network side. Each bit in the second bit group corresponds to an RBG one by one, wherein the length of each sub-bit group is determined according to first resource allocation information, and the corresponding relation between different values of the first resource allocation information and the length allocation proportion of the sub-bit group is agreed in advance.

At this time, the network device may further include:

and the first allocation information sending module is used for sending the first resource allocation information to the terminal through RRC signaling or downlink control information.

Here, as another implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, where the L sub-bit groups are in one-to-one correspondence with L PDSCHs and are used for indicating L PDSCH frequency domain resources, where N _ RBG is a total number of RBGs allocated to the terminal by the network side. Each bit in the second bit group corresponds to an RBG one by one, wherein the length of each sub-bit group is determined according to second resource allocation information, and the corresponding relation between different values of the second resource allocation information and the length allocation proportion of the sub-bit group is configured in advance.

At this time, the network device may further include:

a second allocation information sending module, configured to send different values of the second resource allocation information to the terminal through an RRC signaling; and sending the second resource allocation information to the terminal through the downlink control information.

Here, as another implementation manner, when the PDSCH resource allocation type is type 1, the frequency domain resource indication information includes:

the length of each third bit group is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

alternatively, the first and second electrodes may be,

the length of the third bit group corresponding to the xth PDSCH is:

wherein x is an integer greater than or equal to 1;

wherein the content of the first and second substances,

indicating the total number of RBs allocated by the network side to the terminal.

or, the frequency domain resource indication information further includes correspondence indication information of correspondence between the L PDSCH frequency domain resources and the L TCI states, and different values of the correspondence indication information are used to indicate different pre-configured or pre-agreed correspondences.

Referring to fig. 5, an embodiment of the present invention provides a structural diagram of a network device 500, including: a processor 501, a transceiver 502, a memory 503, and a bus interface, wherein:

in this embodiment of the present invention, the network device 500 further includes: a program stored on a memory 503 and executable on a processor 501, said program realizing the following steps when executed by the processor 501: and sending downlink control information to a terminal, wherein the downlink control information carries frequency domain resource indication information of L PDSCHs, and L is an integer greater than or equal to 1.

It can be understood that, in the embodiment of the present invention, when the computer program is executed by the processor 501, each process of the embodiment of the method for indicating frequency domain resources shown in fig. 2 can be implemented, and the same technical effect can be achieved.

In fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 501 and various circuits of memory represented by memory 503 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 502 may be a plurality of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium.

The processor 501 is responsible for managing the bus architecture and general processing, and the memory 503 may store data used by the processor 501 in performing operations.

In some embodiments of the invention, there is also provided a computer readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of: and sending downlink control information to a terminal, wherein the downlink control information carries frequency domain resource indication information of L PDSCHs, and L is an integer greater than or equal to 1.

When executed by the processor, the program can implement all implementation manners in the frequency domain resource indication method applied to the network device, and can achieve the same technical effect, and is not repeated herein to avoid repetition.

Referring to fig. 6, an embodiment of the present invention provides a terminal 60, including:

a downlink control information receiving module 61, configured to receive downlink control information sent by a network device, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1;

a PDSCH receiving module 62, configured to receive the L PDSCHs according to the frequency domain resource indication information.

Here, as another implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, where the L sub-bit groups correspond to L PDSCHs one to one and are used to indicate L PDSCH frequency domain resources, where N _ RBG is a total number of RBGs allocated to a terminal by a network side. The L sub-bit groups are used to indicate L PDSCH frequency domain resources in a bitmap manner, and each bit corresponds to L RBGs.

Here, as another implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, where the L sub-bit groups are associated with L PDSCHs, i.e., one PDSCH bit groupA corresponding unit for indicating L PDSCH frequency domain resources, wherein each bit in the second bit group corresponds to an RBG one by one, and the number of bits included in each sub-bit group is

Here, as a further implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, where the L sub-bit groups are in one-to-one correspondence with L PDSCHs and used for indicating L PDSCH frequency domain resources, where each bit in the second bit group is in one-to-one correspondence with an RBG, where the length of each sub-bit group is determined according to the first resource allocation information, and a correspondence relationship between different values of the first resource allocation information and length allocation examples of the sub-bit groups is predetermined.

At this time, the terminal further includes:

a first allocation information receiving module, configured to receive the first resource allocation information sent by the network device through an RRC signaling or downlink control information; and determining the length of each sub-bit group in the second bit group and the frequency domain resource position of the PDSCH of each transmission point according to the first resource allocation information.

Here, as a further implementation manner, when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, which are in one-to-one correspondence with L PDSCHs and used for indicating L PDSCH frequency domain resources, where each bit in the second bit group is in one-to-one correspondence with an RBG, where the length of each sub-bit group is determined according to the second resource allocation information, and a correspondence relationship between different values of the second resource allocation information and length allocation examples of the sub-bit groups is preconfigured.

At this time, the terminal further includes:

a second allocation information receiving module, configured to receive different values of the second resource allocation information sent by the network device through RRC signaling; receiving the second resource allocation information sent by the network equipment through downlink control information; and determining the length of each sub-bit group in the second bit group and the frequency domain resource position of the PDSCH of each transmission point according to the value of the second resource allocation information.

the length of each third bit group is:

alternatively, the first and second electrodes may be,

the length of the third bit group corresponding to the xth PDSCH is:

alternatively, the first and second electrodes may be,

the length of the third bit group corresponding to the xth PDSCH is:

wherein x is an integer greater than or equal to 1;

wherein the content of the first and second substances,

or, the frequency domain resource indication information further includes correspondence indication information of correspondence between the L PDSCH frequency domain resources and the L TCI states, where different values of the correspondence indication information are used to indicate different pre-configured or pre-agreed correspondences;

at this time, the terminal further includes:

a TCI status determining module, configured to determine, according to the TCI status indication information, a TCI status corresponding to the PDSCH of each transmission point; and determining the receiving beam of the PDSCH of each transmission point according to the TCI state corresponding to the PDSCH of each transmission point.

Referring to fig. 7, a schematic structural diagram of a terminal according to an embodiment of the present invention is shown, where the terminal 700 includes: a processor 701, a transceiver 702, a memory 703, a user interface 704, and a bus interface.

In this embodiment of the present invention, the terminal 700 further includes: programs stored on the memory 703 and executable on the processor 701.

The processor 701 implements the following steps when executing the program:

It can be understood that, in the embodiment of the present invention, when being executed by the processor 701, the computer program can implement each process of the frequency domain resource indication method embodiment shown in fig. 3, and can achieve the same technical effect, and is not described herein again to avoid repetition.

In fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 703, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 704 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.

In some embodiments of the invention, there is also provided a computer readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of:

When executed by the processor, the program can implement all implementation manners in the above-described method for indicating frequency domain resources applied to the terminal side, and can achieve the same technical effect, and is not described herein again to avoid repetition.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for indicating frequency domain resources is applied to a network device, and is characterized by comprising the following steps:

sending downlink control information to a terminal, wherein the downlink control information carries frequency domain resource indication information of L PDSCHs, and L is an integer greater than or equal to 1;

the downlink control information further carries TCI status indication information for indicating L TCI statuses corresponding to the L PDSCHs, wherein,

or, the frequency domain resource indication information further includes correspondence indication information of correspondence between the frequency domain resources of the L PDSCHs and the L TCI states, and different values of the correspondence indication information are used to indicate different pre-configured or pre-agreed correspondences.

2. The method of claim 1, wherein when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes L first bit groups of length N _ RBGs, wherein the L first bit groups are in one-to-one correspondence with the L PDSCHs for indicating frequency domain resources of the L PDSCHs in a bit bitmap manner, and the N _ RBGs are a total number of RBGs allocated by the network side for a terminal.

3. The method of claim 1, wherein when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, the L sub-bit groups are in one-to-one correspondence with L PDSCHs for indicating L PDSCH frequency domain resources, where N _ RBG is a total number of RBGs allocated by a network side for a terminal.

4. The method of claim 3,

the L sub-bit groups are used for indicating L PDSCH frequency domain resources in a bit bitmap mode, and each bit corresponds to L RBGs;

The N _ RBG is the total number of RBGs which are distributed to the terminal by the network side;

or, each bit in the second bit group corresponds to an RBG one to one, wherein the length of each sub-bit group is determined according to second resource allocation information, and a correspondence between different values of the second resource allocation information and a length allocation proportion of the sub-bit group is pre-configured.

5. The method of claim 4,

when the length of each sub-bit group is determined according to the first resource allocation information, the method further includes: sending the first resource allocation information to a terminal through RRC signaling or downlink control information;

6. The method of any of claims 1 to 5, wherein when the PDSCH resource allocation type is type 1, the frequency domain resource indication information comprises:

the length of each third bit group is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

wherein x is an integer greater than or equal to 1;

wherein the content of the first and second substances,

7. A method for indicating frequency domain resources is applied to a terminal, and is characterized by comprising the following steps:

receiving the L PDSCHs according to the frequency domain resource indication information;

8. The method of claim 7, wherein when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes L first bit groups of length N _ RBGs, where the L first bit groups correspond to the L PDSCHs one to one for indicating frequency domain resources of the L PDSCHs in a bit bitmap manner, and the N _ RBGs are total number of RBGs allocated to the terminal by the network side.

9. The method of claim 7, wherein when the PDSCH resource allocation type is type 0, the frequency domain resource indication information includes 1 second bit group with a length of N _ RBG, and the second bit group includes L sub-bit groups, the L sub-bit groups are in one-to-one correspondence with L PDSCHs for indicating L PDSCH frequency domain resources, wherein N _ RBG is a total number of RBGs allocated by a network side for a terminal.

10. The method of claim 9,

11. The method of claim 10,

when the length of each sub-bit group is determined according to the first resource allocation information, the method further includes: receiving the first resource allocation information sent by the network equipment through RRC signaling or downlink control information; determining the length of each sub-bit group in the second bit group and the frequency domain resource position of the PDSCH of each transmission point according to the first resource allocation information;

when the length of each sub-bit group is determined according to the second resource allocation information, the method further includes: receiving different values of the second resource allocation information sent by the network equipment through RRC signaling; receiving the second resource allocation information sent by the network device through downlink control information; and determining the length of each sub-bit group in the second bit group and the frequency domain resource position of the PDSCH of each transmission point according to the value of the second resource allocation information.

12. The method of any of claims 7 to 11, wherein when the PDSCH resource allocation type is type 1, the frequency domain resource indication information comprises:

the length of each third bit group is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

alternatively, the first and second liquid crystal display panels may be,

the length of the third bit group corresponding to the xth PDSCH is:

wherein x is an integer greater than or equal to 1;

wherein the content of the first and second substances,

13. The method according to any one of claims 7 to 11,

the method further comprises the following steps:

14. A network device, comprising:

a downlink control information sending module, configured to send downlink control information to a terminal, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1;

15. A network device comprising a transceiver and a processor, wherein,

the transceiver is configured to send downlink control information to a terminal, where the downlink control information carries frequency domain resource indication information of L PDSCHs, where L is an integer greater than or equal to 1;

16. A terminal, comprising:

a PDSCH receiving module, configured to receive the L PDSCHs according to the frequency domain resource indication information;

17. A terminal comprising a transceiver and a processor, wherein,

the processor is configured to receive the L PDSCHs according to the frequency domain resource indication information;

18. A communication device, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of indicating frequency domain resources of any one of claims 1 to 13.

19. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for indicating frequency domain resources of any one of claims 1 to 13.