CN111867096A - Communication method, device and system

Info

Abstract

Description

Claims

CN111867096A

Publication number: CN111867096A
Application number: CN201910760333.7A
Authority: CN
Inventors: 花梦; 吴海; 龙毅
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-26
Filing date: 2019-08-16
Publication date: 2020-10-30
Anticipated expiration: 2039-08-16
Also published as: CN111867096B

The embodiment of the application provides a communication method, a device and a system, which can improve the utilization rate of resources on the premise of not influencing the receiving performance of a downlink data channel. The scheme comprises the following steps: the terminal equipment receives configuration information from the network equipment; the terminal equipment receives downlink control information from the network equipment; the terminal equipment determines a first resource according to the configuration information, wherein the first resource is a resource which cannot transmit a downlink data channel and a demodulation reference signal of the downlink data channel; the terminal equipment determines a second resource according to the downlink control information, wherein the second resource comprises a resource used for transmitting a downlink data channel and a demodulation reference signal of the downlink data channel; the terminal equipment determines a third resource according to the first resource and the second resource, wherein the third resource is a resource used for transmitting a downlink data channel and a demodulation reference signal of the downlink data channel in the second resource; and the terminal equipment receives the downlink data channel from the network equipment and the demodulation reference signal of the downlink data channel on the third resource.

Communication method, device and system

This application claims priority from a chinese patent application filed by the national intellectual property office on 26/04/2019 under application number 201910346044.2 entitled "communication method, apparatus and system", the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method, device, and system.

Background

In an existing New Radio (NR) system, a frequency domain minimum scheduling granularity of a Physical Downlink Shared Channel (PDSCH) is a plurality of Resource Blocks (RBs). For example, in type 0(type0), the frequency domain minimum scheduling granularity of the PDSCH is a Resource Block Group (RBG).

In addition, some time-frequency resources that cannot be used for transmitting the PDSCH are defined in the NR system, and if the time-frequency resources intersect with time-frequency resource blocks determined by the terminal device according to Downlink Control Information (DCI), the intersected time-frequency resources are not used for transmitting the PDSCH. Meanwhile, in order to avoid the complexity of channel estimation, the protocol specifies: the terminal device does not expect the demodulation reference signal (DMRS) of the PDSCH and the resources that cannot be used to transmit the PDSCH to overlap, even partially overlap (a UE is not expected to be transmitted to the channel where PDSCH DMRS is area overlapping, even the event part, with the new rs not available for PDSCH).

However, as shown in fig. 1a, if N RB resources defined by the NR system are present in one RBG and PDSCH cannot be transmitted, if the whole RBG is not scheduled, RB resources other than the N RB resources in the RBG are wasted. If the RBG is scheduled, the network device needs to configure the resources of the entire RBG to the terminal device through DCI, and indicate the resources of N RBs that cannot be used to transmit the PDSCH. In this case, the terminal device can know the resources of N RBs that cannot be used to transmit the PDSCH from the indication information, but the terminal device does not expect the DMRS for the PDSCH and the resources that cannot be used to transmit the PDSCH to overlap in consideration of protocol specifications, and therefore the terminal device still considers that the DMRS exists at a position for transmitting the DMRS, which obviously affects channel estimation and noise estimation, and affects reception performance of the PDSCH.

Disclosure of Invention

The embodiment of the application provides a communication method, a device and a system, which can improve the utilization rate of resources on the premise of not influencing the receiving performance of a downlink data channel.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a communication method is provided, and the method includes: the terminal equipment receives configuration information from the network equipment; the terminal equipment receives downlink control information from the network equipment; the terminal equipment determines a first resource according to the configuration information, wherein the first resource is a resource which can not transmit a downlink data channel and a demodulation reference signal of the downlink data channel; the terminal equipment determines a second resource according to the downlink control information, wherein the second resource comprises a resource used for transmitting the downlink data channel and a demodulation reference signal of the downlink data channel; the terminal device determines a third resource according to the first resource and the second resource, where the third resource is a resource used for transmitting the downlink data channel and a demodulation reference signal of the downlink data channel in the second resource; and the terminal equipment receives the downlink data channel from the network equipment and the demodulation reference signal of the downlink data channel on the third resource. Based on the scheme, since the first resource in the scheme is a resource which can not transmit the downlink data channel and the demodulation reference signal of the downlink data channel, the second resource comprises a resource for transmitting the downlink data channel scheduled by the DCI and the demodulation reference signal of the downlink data channel, and the third resource is a resource for transmitting the downlink data channel and the demodulation reference signal of the downlink data channel in the second resource, and therefore, in the case where the frequency domain minimum scheduling granularity of the downlink data channel is a plurality of RBs, the plurality of RBs can be scheduled, and receives or transmits the demodulation reference signals of the downlink data channel and the downlink data channel only on the resource (i.e. the third resource) for transmitting the demodulation reference signals of the downlink data channel and the downlink data channel in the second resource, therefore, the utilization rate of resources can be improved on the premise of not influencing the receiving performance of the downlink data channel.

In one possible design, the determining, by the terminal device, the first resource according to the configuration information includes: and the terminal equipment determines the first resource according to the configuration information and the downlink control information. That is to say, in the embodiment of the present application, when determining the first resource according to the configuration information, the terminal device may determine the first resource by combining the downlink control information, so as to further meet the scheduling requirement of the downlink data channel.

In a second aspect, a communication method is provided, the method comprising: the network equipment sends configuration information to the terminal equipment, wherein the configuration information is used for determining a first resource, and the first resource is a resource which can not transmit a downlink data channel and a demodulation reference signal of the downlink data channel; the network equipment sends downlink control information to the terminal equipment, wherein the downlink control information is used for determining second resources, and the second resources comprise resources used for transmitting the downlink data channel and demodulation reference signals of the downlink data channel; the network device determines a third resource according to the first resource and the second resource, where the third resource is a resource used for transmitting the downlink data channel and the demodulation reference signal of the downlink data channel in the second resource; and the network equipment sends the downlink data channel and the demodulation reference signal of the downlink data channel to the terminal equipment on the third resource. Based on the scheme, since the first resource in the scheme is a resource which can not transmit the downlink data channel and the demodulation reference signal of the downlink data channel, the second resource comprises a resource for transmitting the downlink data channel scheduled by the DCI and the demodulation reference signal of the downlink data channel, and the third resource is a resource for transmitting the downlink data channel and the demodulation reference signal of the downlink data channel in the second resource, and therefore, in the case where the frequency domain minimum scheduling granularity of the downlink data channel is a plurality of RBs, the plurality of RBs can be scheduled, and receives or transmits the demodulation reference signals of the downlink data channel and the downlink data channel only on the resource (i.e. the third resource) for transmitting the demodulation reference signals of the downlink data channel and the downlink data channel in the second resource, therefore, the utilization rate of resources can be improved on the premise of not influencing the receiving performance of the downlink data channel.

In one possible design, the downlink control information is also used to determine the first resource. That is to say, in the embodiment of the present application, when determining the first resource according to the configuration information, the terminal device may determine the first resource by combining the downlink control information, so as to further meet the scheduling requirement of the downlink data channel.

With reference to the first aspect or the second aspect, in a possible design, the configuration information includes indication information of frequency domain resources in the first resource; wherein, the time domain resources in the first resources include all time domain resources within the validity period of the first resources. That is to say, in the embodiment of the present application, only the frequency domain resources in the first resources may be configured, and the time domain resources in the first resources are defaulted (e.g., specified by a protocol) to all the time domain resources within the validity period of the first resources.

With reference to the first aspect or the second aspect, in a possible design, the configuration information includes indication information of frequency domain resources in the first resource and indication information of time domain resources in the first resource, where the indication information of time domain resources is used to indicate that the time domain resources in the first resource include all time domain resources within the validity period of the first resource. That is to say, in the embodiment of the present application, a frequency domain resource and a time domain resource in the first resource may be configured simultaneously, where the time domain resource in the first resource is configured as all time domain resources within the validity period of the first resource.

With reference to the first aspect or the second aspect, in one possible design, the configuration information is characterized by M rate matching patterns, where M is a positive integer less than or equal to a first set value. For example, the configuration information is characterized by 1 rate matching pattern, or the configuration information is characterized by a limited number of rate matching patterns.

With reference to the first aspect or the second aspect, in a possible design, a first rate matching pattern of the M rate matching patterns includes S segments of frequency domain resources, where S is a positive integer smaller than or equal to a second set value. For example, the first rate matching pattern of the M rate matching patterns includes 1 segment of frequency domain resources, or the first rate matching pattern of the M rate matching patterns includes a limited number of segments of frequency domain resources.

With reference to the first aspect or the second aspect, in a possible design, the frequency domain resources in the first resources are N segments of frequency domain resources, and N is a positive integer smaller than or equal to a third setting value. For example, the frequency domain resource in the first resource is 1 segment of frequency domain resource; or, the frequency domain resources in the first resources are multiple segments of frequency domain resources.

With reference to the first aspect or the second aspect, in a possible design, the first resource is a resource other than resources corresponding to at least one group of rate matching patterns, where the resources corresponding to the at least one group of rate matching patterns are resources that cannot transmit the downlink data channel and are indicated by the downlink control information.

With reference to the first aspect or the second aspect, in a possible design, the downlink data channel belongs to a downlink data channel with a mapping type of type a. That is, only the demodulation reference signal of the downlink data channel with the mapping type of type a may overlap with the resource that cannot be used for transmitting the downlink data channel, and the demodulation reference signal of the downlink data channel with the mapping type of type B may not overlap with the resource that cannot be used for transmitting the downlink data channel. In this case, the processing of the downlink data channel with the mapping type of type B may refer to the scheme of the existing protocol, which is not described herein again.

With reference to the first aspect or the second aspect, in a possible design, the downlink data channel belongs to a downlink data channel whose mapping type is type B and whose persistent time domain resource length is a fourth set value. That is, only the demodulation reference signal of the downlink data channel whose mapping type is type B and whose persistent time domain resource length is the fourth setting value may overlap with the resource that cannot be used for transmitting the downlink data channel; the mapping type is type B, and the demodulation reference signal of the downlink data channel with the persistent time domain resource length being a value other than the fourth set value cannot overlap with the resource that cannot be used for transmitting the downlink data channel. In this case, the mapping type is type B, and the processing of the downlink data channel with the persistent time domain resource length being a value other than the fourth setting value may refer to the scheme of the existing protocol, which is not described herein again.

With reference to the first aspect or the second aspect, in a possible design, in a case that the demodulation reference signal of the downlink data channel is in a two-symbol mode, the two-symbol mode demodulation reference signal includes at least one group of two-symbol demodulation reference signals. If the fourth resource includes a first demodulation reference signal symbol corresponding to a group of two-symbol demodulation reference signals on a resource block and does not include a second demodulation reference signal symbol corresponding to the group of two-symbol demodulation reference signals on the resource block, the second demodulation reference signal symbol cannot be used for transmitting a demodulation reference signal of a downlink data channel. And the fourth resource is the intersection of the first resource and the second resource. Optionally, the second demodulation reference signal symbol cannot be used for transmitting a downlink data channel.

With reference to the first aspect or the second aspect, in a possible design, the first resource includes one symbol in a time domain and all resource blocks in one bandwidth portion BWP in a frequency domain or all resource blocks in one carrier, or the first resource includes one resource block in the frequency domain and all symbols in the time domain. Or, if the first resource includes a resource block in the frequency domain and a symbol in the time domain, it is determined that the first resource includes the symbol in the time domain and all resource blocks in a bandwidth portion BWP in the frequency domain or all resource blocks in a carrier, or the first resource includes the resource block in the frequency domain and all symbols in the time domain.

With reference to the first aspect or the second aspect, in a possible design, if a resource used for transmitting a demodulation reference signal of a downlink data channel in the second resource overlaps with the first resource, the terminal device or the network device may determine that the resource is within a frequency domain of the overlapping resource, and the second resource cannot be used for transmitting the demodulation reference signal of the downlink data channel within a duration of the second resource. Optionally, within the frequency domain range of the overlapping resource, the second resource cannot be used for transmitting the downlink data channel within the duration of the second resource.

With reference to the first aspect or the second aspect, in a possible design, if a resource used for transmitting a demodulation reference signal of a downlink data channel in the second resource overlaps with the first resource, the terminal device or the network device may determine that the resource overlaps in a time domain range, and the resource cannot be used for transmitting the demodulation reference signal of the downlink data channel in a frequency domain range. Optionally, the time domain range of the overlapped resource and the frequency domain range of the second resource may not be used for transmitting the downlink data channel.

In a third aspect, a communications apparatus is provided for implementing the various methods described above. The communication device may be the terminal device of the first aspect or a chip system that implements the function of the terminal device; alternatively, the communication device may be the network device in the second aspect or a chip system that implements the function of the network device. The communication device includes corresponding modules, units, or means (means) for implementing the above methods, and the modules, units, or means may be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

In a fourth aspect, a communication apparatus is provided, including: a processor and a memory; the memory is configured to store computer instructions that, when executed by the processor, cause the communication device to perform the method of any of the above aspects. The communication device may be the terminal device of the first aspect or a chip system that implements the function of the terminal device; alternatively, the communication device may be the network device in the second aspect or a chip system that implements the function of the network device.

In a fifth aspect, a communication apparatus is provided, including: a processor; the processor is configured to be coupled to the memory, and after reading the instructions in the memory, perform the method according to any one of the above aspects. The communication device may be the terminal device of the first aspect or a chip system that implements the function of the terminal device; alternatively, the communication device may be the network device in the second aspect or a chip system that implements the function of the network device.

In a sixth aspect, there is provided a computer readable storage medium having stored therein instructions which, when run on a computer, cause the computer to perform the method of any of the above aspects.

In a seventh aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the above aspects.

In an eighth aspect, a communication device (which may be a chip or a system of chips, for example) is provided, which comprises a processor for implementing the functionality referred to in any of the above aspects. In one possible design, the communication device further includes a memory for storing necessary program instructions and data. When the communication device is a chip system, the communication device may be constituted by a chip, or may include a chip and other discrete devices.

For technical effects brought by any one of the design manners in the third aspect to the eighth aspect, reference may be made to the technical effects brought by different design manners in the first aspect or the second aspect, and details are not described here.

A ninth aspect provides a communication system comprising the terminal device of the above aspect and the network device of the above aspect.

Drawings

Fig. 1a is a schematic diagram of a conventional PDSCH scheduling;

FIG. 1b is a diagram of a conventional rate matching pattern;

fig. 1c is a first mapping diagram of a conventional PDSCH;

Fig. 1d is a diagram illustrating a conventional mapping of PDSCH;

fig. 1e is a third mapping diagram of a conventional PDSCH;

fig. 2 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a terminal device and a network device provided in an embodiment of the present application;

fig. 4 is another schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a communication method according to an embodiment of the present application;

fig. 6a is a schematic location diagram of an RB resource provided in an embodiment of the present application;

fig. 6b is a schematic diagram of a location of a frequency domain resource in a first resource according to an embodiment of the present application;

fig. 6c is a schematic diagram illustrating a location of a frequency domain resource in a first resource according to an embodiment of the present application;

fig. 6d is a schematic diagram of a location of a frequency domain resource in a first resource according to the present application;

fig. 6e is a schematic diagram illustrating a location of a frequency domain resource in a first resource according to an embodiment of the present application;

fig. 6f is a schematic diagram of a location of a frequency domain resource in a first resource according to an embodiment of the present application;

fig. 7a is a first schematic diagram illustrating a location of a first resource according to an embodiment of the present application;

fig. 7b is a schematic diagram illustrating a location of a first resource according to an embodiment of the present application;

Fig. 8 is a schematic location diagram of a second resource provided in an embodiment of the present application;

fig. 9a is a first schematic diagram illustrating a location of a third resource according to an embodiment of the present application;

fig. 9b is a schematic diagram illustrating a location of a third resource according to an embodiment of the present application;

fig. 10a is a third schematic diagram illustrating a location of a first resource according to an embodiment of the present application;

fig. 10b is a fourth schematic diagram illustrating a location of a first resource according to an embodiment of the present application;

fig. 11a is a schematic location diagram of a first resource according to an embodiment of the present application;

fig. 11b is a sixth schematic diagram illustrating a location of a first resource according to an embodiment of the present application;

fig. 12 is a schematic diagram of PDSCH scheduling provided in the embodiment of the present application;

fig. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

To facilitate understanding of the technical solutions of the embodiments of the present application, a brief description of related technologies or terms of the present application is first given as follows.

First, DCI:

in the NR system, a PDCCH (Physical downlink control channel) for scheduling a PDSCH carries DCI. The DCI includes a frequency domain resource allocation (frequency domain resource assignment) information field, a time domain resource allocation (time domain resource assignment) information field, and a rate matching indication field.

Wherein, the frequency domain resource allocation (frequency domain resource allocation) information field is used for indicating the position of the frequency domain resource. The time domain resource allocation (time domain resource allocation) information field is used for indicating the number of starting symbols (symbols) and persistent symbols on the PDSCH time domain, the mapping type of the PDSCH and the DMRS position of the PDSCH. The terminal equipment can determine a time-frequency resource block for transmitting the DMRS of the PDSCH and the PDSCH according to frequency domain resource allocation (frequency domain resource allocation) information and time domain resource allocation (time domain resource allocation) information, and can acquire the mapping type of the PDSCH scheduled by the DCI and the position of the DMRS of the PDSCH. For the description of the mapping type of the PDSCH, reference may be made to the contents in the following embodiments, which are not repeated herein.

The rate matching indication field is used to indicate whether resources in a rate matching pattern group (rate matching pattern group) can be used for transmitting the PDSCH. For example, if a bit corresponding to a rate matching pattern group is 1, the resource in the rate matching pattern group cannot be used for transmitting the PDSCH, and the related description of the rate matching pattern group may refer to the contents in the following embodiments, which are not described herein again.

Of course, other fields may also be included in the DCI, which is not specifically limited in this embodiment of the present application.

It should be noted that the symbol (symbol) in the embodiment of the present application may also be referred to as a time domain symbol, and the symbol may be, for example, an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing) symbol in a Long Term Evolution (LTE) system or an NR system, or other symbols in a future system, and is herein described in a unified manner and will not be described again.

Second, resources that cannot be used to transmit PDSCH:

currently, the resources defined by the NR system that cannot be used to transmit PDSCH are divided into three categories, including: resource at a Resource Block (RB) symbol (symbol) level, resource at a Resource Element (RE) level, and Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) (SS/PBCH block, SSB) resource. In the following embodiments of the present application, the RB symbol level resource is mainly involved, and the RE level resource and the SSB resource are not involved, which are described in a unified manner and will not be described in detail below.

Third, RB symbol level resources that cannot be used to send PDSCH:

each bandwidth part (BWP) of a terminal device may configure up to 4 rate matching patterns (rate match patterns) at the BWP level, and each serving cell may configure up to 4 rate matching patterns at the cell level. Currently, one rate matching pattern may include:

A pair of reserved resources configured by the network device, the pair of reserved resources comprising an RB level table (bitmap) of 1RB granularity and a symbol level bitmap on a time unit comprising 12 or 14 OFDM symbols. Wherein, if the bit value of the RB-level bitmap and the symbol-level bitmap is 1, it indicates that the corresponding resource cannot be used for transmitting the PDSCH. For each RB-level bitmap and symbol-level bitmap pair, a period and pattern (periodicity and pattern) may be configured, where each bit in the periodicity and pattern corresponds to a symbol-level bitmap. Wherein, if the bit value in periodicityand pattern is 1, it represents that the unit has a reserved resource pair. For example, assuming that periodicityand pattern is 10, RB level bitmap is 00110 … … 11, and symbol level bitmap is 10 … … 1101 … … 10, the corresponding resource locations that cannot be used for transmitting PDSCH can be as shown in fig. 1 b.

It should be noted that, in the embodiment of the present application, a time unit including 12 OFDM symbols or 14 OFDM symbols is called a subframe in an LTE system, and corresponds to 2 slots (slots); corresponding to 1 slot in the NR system. In the following embodiments of the present application, slots (slots) are described by taking slots (slots) of an NR system as an example, and are described herein in a unified manner, which is not described again below.

Fourth, rate matching pattern group (rate match pattern group):

wherein, a configured rate pattern group (for example, the rate pattern group1 or the rate pattern group2) includes a set of resource sets corresponding to the rate pattern. Each ratemap pattern group corresponds to 1bit in the rate matching indication field in DCI carried on the PDCCH scheduling this PDSCH. If the bit corresponding to a rate pattern group is 1, this part of resources cannot be used for transmitting PDSCH. Furthermore, the rate pattern resource not included in any one of the rate pattern groups is not used to transmit PDSCH.

Fifth, frequency domain scheduling granularity of PDSCH:

currently, there are two frequency domain resource scheduling methods for PDSCH, type 0(type0) and type 1(type 1).

In type0, a BWP is grouped at RBG granularity, and then a bitmap (bitmap) is used to indicate whether the resource of a certain RBG group is allocated to a certain terminal device. Here, the size of the RBG may be determined in conjunction with the following table, BWP bandwidth (bandwidth size), and higher layer parameter RBG-size, where RBG-size indicates whether the end device uses configuration 1(configuration 1) or configuration 2(configuration 2).

Watch 1

In type1, a segment of continuous Virtual Resource Block (VRB) of a downlink BWP is allocated to a terminal device, and there are two modes, i.e., interleaving mode and non-interleaving mode. In the non-interleaved mode, VRBs are directly mapped to (physical RBs). In the interleaving mode, row-column interleaving based on 2 is performed for VRBs to PRBs, and the interleaving unit is 2RB or 4 RB.

Sixthly, a time domain mapping method of the PDSCH:

in the NR system, there are two mapping types for PDSCH: mapping type a (mapping type a) and mapping type b (mapping type b). The starting symbol S (the first symbol number of the slot is denoted by 0, and so on) and the number L of persistent symbols (counted from the symbol S) of the two types of PDSCHs are different, and the positions of DMRSs are also different. Table two shows the differences in S and L for the two types.

Watch two

As can be seen from table two, in the case of a normal Cyclic Prefix (CP) (normal CP, NCP) (extended CP (ECP) is similar):

(1) the start symbol of type a may be the first 4 symbols {0, 1, 2, 3}, and the start symbol of type B may be the first 13 symbols {0, …, 12 };

(2) the number of persistent symbols for type A may be {3, …, 14} and the number of persistent symbols for type B may be {2, 4, 7 }.

For example, taking mapping type a as an example, assuming that the starting symbol is 2 and the number of persistent symbols is 11, the PDSCH may be mapped to symbols {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}, as shown in fig. 1 c.

Or, for example, taking mapping type B as an example, assuming that the starting symbol is 4 and the number of persistent symbols is 2, the PDSCH may be mapped to symbols {4, 5}, as shown in fig. 1 d.

Or, for example, taking mapping type B as an example, assuming that the starting symbol is 8 and the number of persistent symbols is 4, the PDSCH may be mapped to symbols {8, 9, 10, 11}, as shown in fig. 1 e.

In addition, it should be noted that, for mapping type a, according to the higher layer parameter DMRS-type a-Position, the Position of the first DMRS symbol may be determined, which may be at symbol 2 or symbol 3; and for mapping type B, the first DMRS symbol is on the first symbol of PDSCH. In addition, the two mapping types of scheduling may also have additional DMRS symbols, which are described herein in a unified manner and are not described in detail below.

Seventh, time domain mapping method of DMRS of PDSCH:

in the NR system, DMRSs for PDSCH have two modes, single symbol and two symbol. In the single symbol mode, DMRS may be transmitted on one or more symbols, and the symbols transmitting DMRS are not connected to each other. In the two-symbol mode, DMRS may be transmitted on one or more groups of symbols, each group of symbols transmitting one group of DMRS, each group of DMRS being transmitted on 2 consecutive OFDM symbols, with no group-to-group connection.

In the dual-symbol mode, DMRSs of 2 symbols of a group of terminal-side devices are all received, and then the group of DMRSs is used to perform channel estimation.

Note that the index of the symbol starts from 0, but the index of the symbol is the number 1. That is, the symbol with index 0 is the 1 st symbol, the symbol with index 1 is the 2 nd symbol, and so on.

Reference point and location of the first DMRS symbol₀Depending on the mapping type of PDSCH: for PDSCHmapping type A, l is defined relative to the start symbol of the slot, l ₀3 or l₀2 (determined from higher layer parameters); for PDSCH mapping type B, | is defined by the starting symbol of the scheduled PDSCH resource, |₀＝0。

Symbol duration l of DMRS_dIs defined as: for PDSCH mapping type A, l_dIs the duration from the first symbol of the slot to the last symbol of the scheduled PDSCH resources; for PDSCH mapping type B, l_dIs the number of OFDM symbols of the scheduled PDSCH resources.

As can be seen from the following tables III and IV, according to the PDSCH mapping type, the higher layer parameter dmrs-AdditionalPosition and PDSCH duration l_dThe location of the DMRS symbol(s) can be determined

Wherein the DMRS is placed in

On the symbol of (c). Wherein: in the single sign mode of the display device,

is one or more symbols that are not consecutive, l' is 0; in the two-symbol mode, the first symbol is,

for the discontinuous symbol or symbols, i.e. the first symbol of each set of DMRS symbols, l' may be 0 or 1, corresponding to 2 consecutive symbols in the dual symbol mode.

In the single symbol mode, after channel estimation is performed using each DMRS, filtering operations (e.g., wiener filtering) may be performed on results of multiple channel estimation to obtain channel estimation on REs of the PDSCH; in the dual-symbol mode, after channel estimation is performed using each group of DMRSs, filtering operation may be performed on results of multiple channel estimation to obtain channel estimation on REs of PDSCH. Different numbers of DMRSs and filtering parameters corresponding to different positions may be different.

Watch III

Watch four

Wherein, in table III, l₁The value is 11 or 12, determined by the high level parameters.

Eighth, bandwidth part:

under NR, BWP is introduced, where a BWP is a continuous segment RB. of a carrier, and multiple downlink BWPs and multiple uplink BWPs can be configured on the carrier, but only 1 downlink active BWP and 1 uplink active BWP can be configured at a certain time.

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Where in the description of the present application, "/" indicates a relationship where the objects associated before and after are an "or", unless otherwise stated, for example, a/B may indicate a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple. In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance. Also, in the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion for ease of understanding.

The embodiment of the present application may be applied to an LTE system or an NR system (which may also be referred to as a fifth generation (5G) system), and may also be applied to other new systems facing the future, and the like, and the embodiment of the present application is not particularly limited to this. In addition, the term "system" may be used interchangeably with "network".

Fig. 2 shows a communication system 20 according to an embodiment of the present application. The communication system 20 includes a network device 30 and one or more terminal devices 40 connected to the network device 30. Alternatively, different terminal devices 40 may communicate with each other.

Taking an example of interaction between the network device 30 shown in fig. 2 and any terminal device 40, in the embodiment of the present application, the network device 30 is configured to send DCI and configuration information to the terminal device 40. The network device 30 is further configured to determine a third resource according to the first resource and the second resource, and send the downlink data channel and the demodulation reference signal of the downlink data channel to the terminal device 40 on the third resource. The terminal device 40 is further configured to receive the DCI and the configuration information from the network device 30, and determine a second resource according to the DCI; and determining the first resource according to the configuration information. The terminal device 40 is further configured to determine a third resource according to the first resource and the second resource, and receive the downlink data channel from the network device 30 and the demodulation reference signal of the downlink data channel on the third resource. The first resource is a resource which cannot transmit the downlink data channel and the demodulation reference signal of the downlink data channel, the second resource comprises a resource used for transmitting the downlink data channel and the demodulation reference signal of the downlink data channel, and the third resource is a resource used for transmitting the downlink data channel and the demodulation reference signal of the downlink data channel in the second resource. The specific implementation of the scheme will be described in detail in the following method embodiments, and will not be described herein again. Based on the scheme, since the first resource in the scheme is a resource which can not transmit the downlink data channel and the demodulation reference signal of the downlink data channel, the second resource comprises a resource for transmitting the downlink data channel scheduled by the DCI and the demodulation reference signal of the downlink data channel, and the third resource is a resource for transmitting the downlink data channel and the demodulation reference signal of the downlink data channel in the second resource, and therefore, in the case where the frequency domain minimum scheduling granularity of the downlink data channel is a plurality of RBs, the plurality of RBs can be scheduled, and receives or transmits the demodulation reference signals of the downlink data channel and the downlink data channel only on the resource (i.e. the third resource) for transmitting the demodulation reference signals of the downlink data channel and the downlink data channel in the second resource, therefore, the utilization rate of resources can be improved on the premise of not influencing the receiving performance of the downlink data channel.

Optionally, the network device 30 in this embodiment is a device that connects the terminal device 40 to a wireless network, and may be an evolved Node B (eNB or eNodeB) in an LTE system; or may be a base station in an NR system or a Public Land Mobile Network (PLMN) in a future evolution, a broadband network service gateway (BNG), a convergence switch or a 3rd generation partnership project (3 GPP) access device, and the like, which is not specifically limited in this embodiment of the present invention. Optionally, the base station in the embodiment of the present application may include various forms of base stations, for example: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like, which are not specifically limited in this embodiment of the present application.

Optionally, the terminal device 40 in the embodiment of the present application may be a device for implementing a wireless communication function, such as a terminal or a chip that can be used in the terminal. The terminal may be a User Equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, a terminal device, or the like in an LTE system, an NR system, or a PLMN which is evolved in the future. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, or a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The terminal may be mobile or stationary.

Optionally, the network device 30 and the terminal device 40 in this embodiment may also be referred to as a communication apparatus, which may be a general device or a special device, and this is not specifically limited in this embodiment.

Optionally, as shown in fig. 3, a schematic structural diagram of the network device 30 and the terminal device 40 provided in the embodiment of the present application is shown.

The terminal device 40 includes at least one processor (exemplarily illustrated in fig. 3 by including one processor 401) and at least one transceiver (exemplarily illustrated in fig. 3 by including one transceiver 403). Optionally, the terminal device 40 may further include at least one memory (exemplarily illustrated in fig. 3 by including one memory 402), at least one output device (exemplarily illustrated in fig. 3 by including one output device 404), and at least one input device (exemplarily illustrated in fig. 3 by including one input device 405).

The processor 401, the memory 402 and the transceiver 403 are connected by a communication line. The communication link may include a path for transmitting information between the aforementioned components.

The processor 401 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the present disclosure. In a specific implementation, the processor 401 may also include multiple CPUs as an embodiment, and the processor 401 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores that process data (e.g., computer program instructions).

The memory 402 may be a device having a storage function. Such as, but not limited to, read-only memory (ROM) or other types of static storage devices that may store static information and instructions, Random Access Memory (RAM) or other types of dynamic storage devices that may store information and instructions, electrically erasable programmable read-only memory (EEPROM), compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 402 may be separate and coupled to the processor 401 via a communication link. The memory 402 may also be integrated with the processor 401.

The memory 402 is used for storing computer-executable instructions for executing the present application, and is controlled by the processor 401 to execute. Specifically, the processor 401 is configured to execute computer-executable instructions stored in the memory 402, so as to implement the communication method described in the embodiment of the present application.

Alternatively, in this embodiment of the application, the processor 401 may also perform functions related to processing in a communication method provided in embodiments described below in the application, and the transceiver 403 is responsible for communicating with other devices or a communication network, which is not specifically limited in this embodiment of the application.

Optionally, the computer execution instruction in the embodiment of the present application may also be referred to as an application program code or a computer program code, which is not specifically limited in the embodiment of the present application.

The transceiver 403 may use any transceiver or other device for communicating with other devices or communication networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), or the like. The transceiver 403 includes a transmitter (Tx) and a receiver (Rx).

An output device 404 is in communication with the processor 401 and may display information in a variety of ways. For example, the output device 404 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like.

The input device 405 is in communication with the processor 401 and may accept user input in a variety of ways. For example, the input device 405 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

Network device 30 includes at least one processor (illustrated in fig. 3 as including one processor 301), at least one transceiver (illustrated in fig. 3 as including one transceiver 303), and at least one network interface (illustrated in fig. 3 as including one network interface 304). Optionally, the network device 30 may further include at least one memory (exemplarily illustrated in fig. 3 by including one memory 302). The processor 301, the memory 302, the transceiver 303, and the network interface 304 are connected via a communication line. The network interface 304 is configured to connect with a core network device through a link (e.g., an S1 interface), or connect with a network interface of another network device (not shown in fig. 3) through a wired or wireless link (e.g., an X2 interface), which is not specifically limited in this embodiment of the present application. In addition, the description of the processor 301, the memory 302 and the transceiver 303 may refer to the description of the processor 401, the memory 402 and the transceiver 403 in the terminal device 40, and will not be repeated herein.

In conjunction with the schematic structural diagram of the terminal device 40 shown in fig. 3, fig. 4 is a specific structural form of the terminal device 40 provided in the embodiment of the present application.

Wherein, in some embodiments, the functions of the processor 401 in fig. 3 may be implemented by the processor 110 in fig. 4.

In some embodiments, the functions of the transceiver 403 in fig. 3 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, and the like in fig. 4.

Wherein the

antennas

1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in terminal equipment 40 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a solution including wireless communication technologies such as 2G/3G/4G/5G applied to the terminal device 40. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.

The wireless communication module 160 may provide solutions for wireless communication applied on the terminal device 40, including WLAN (e.g., Wi-Fi network), Bluetooth (BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the signal into electromagnetic waves through the antenna 2 to radiate the electromagnetic waves. When the terminal device 40 is a first device, the wireless communication module 160 may provide a solution for NFC wireless communication applied on the terminal device 40, meaning that the first device includes an NFC chip. The NFC chip can improve the NFC wireless communication function. When the terminal device 40 is a second device, the wireless communication module 160 may provide a solution for NFC wireless communication applied on the terminal device 40, that is, the first device includes an electronic tag (e.g., a Radio Frequency Identification (RFID) tag). The NFC chip of the other device is close to the electronic tag to perform NFC wireless communication with the second device.

In some embodiments, antenna 1 of terminal device 40 is coupled to mobile communication module 150 and antenna 2 is coupled to wireless communication module 160 so that terminal device 40 can communicate with networks and other devices via wireless communication techniques. The wireless communication technology may include Long Term Evolution (LTE), BT, GNSS, WLAN, NFC, FM, or IR technology, among others. The GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou satellite navigation system (BDS), a quasi-zenith satellite system (QZSS), or a Satellite Based Augmentation System (SBAS).

In some embodiments, the functions of the memory 402 in fig. 3 may be implemented by the internal memory 121 in fig. 4 or an external memory (e.g., a Micro SD card) or the like connected to the external memory interface 120.

In some embodiments, the functionality of output device 404 in FIG. 3 may be implemented by display screen 194 in FIG. 4. The display screen 194 is used to display images, videos, and the like. The display screen 194 includes a display panel.

In some embodiments, the functionality of the input device 405 of fig. 3 may be implemented by a mouse, a keyboard, a touch screen device, or the sensor module 180 of fig. 4. Illustratively, as shown in fig. 4, the sensor module 180 may include, for example, one or more of a pressure sensor 180A, a gyroscope sensor 180B, a barometric pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, and a bone conduction sensor 180M, which is not particularly limited in this embodiment of the present application.

In some embodiments, as shown in fig. 4, the terminal device 40 may further include one or more of an audio module 170, a camera 193, an indicator 192, a motor 191, a key 190, a SIM card interface 195, a USB interface 130, a charging management module 140, a power management module 141, and a battery 142, wherein the audio module 170 may be connected to a speaker 170A (also referred to as a "speaker"), a receiver 170B (also referred to as a "receiver"), a microphone 170C (also referred to as a "microphone", "microphone"), or an earphone interface 170D, which is not particularly limited in this embodiment.

It is to be understood that the structure shown in fig. 4 does not constitute a specific limitation to the terminal device 40. For example, in other embodiments of the present application, terminal device 40 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The communication method provided by the embodiment of the present application will be described below by taking an example of interaction between the network device 30 shown in fig. 2 and any terminal device 40 with reference to fig. 2 to 4.

It should be noted that, in the following embodiments of the present application, names of messages between network elements or names of parameters in messages are only an example, and other names may also be used in a specific implementation, which is not specifically limited in this embodiment of the present application.

Taking the NR system as the communication system shown in fig. 2, the PDSCH as the downlink data channel, and the DMRS as the demodulation reference signal of the PDSCH as an example, as shown in fig. 5, the communication method provided in the embodiment of the present application includes the following steps S501 to S507:

s501, the network equipment sends configuration information to the terminal equipment. The terminal device receives configuration information from the network device.

The configuration information is used for determining a first resource, and the first resource is a resource which cannot transmit the PDSCH and the DMRS of the PDSCH.

S502, the network equipment sends the DCI to the terminal equipment. The terminal device receives the DCI from the network device.

Wherein the DCI is used to determine second resources including resources for transmitting DMRS of the PDSCH and the PDSCH.

S503, the network device determines a third resource according to the first resource and the second resource.

And the third resource is a resource of the second resource for transmitting DMRS of the PDSCH and the PDSCH.

S504, the terminal equipment determines the first resource according to the configuration information.

And S505, the terminal equipment determines a second resource according to the DCI.

S506, the terminal equipment determines a third resource according to the first resource and the second resource.

And S507, the network equipment sends the PDSCH and the DMRS of the PDSCH to the terminal equipment on the third resource. The terminal device receives the PDSCH and the DMRS of the PDSCH from the network device on the third resource.

Optionally, in this embodiment of the present application, after determining the first resource, the network device generally sends configuration information for determining the first resource to the terminal device; the network device generally determines the second resource first and then sends DCI for determining the second resource to the terminal device, which is described herein in a unified manner and will not be described again below.

Optionally, there is no inevitable execution sequence among step S501, step S502, and step S503 in this embodiment, any step may be executed first, and then the remaining steps are executed, or two steps may be executed first, and then the remaining step is executed, or the three steps may be executed simultaneously, which is not specifically limited in this embodiment of the present application.

Optionally, there is no inevitable execution sequence between step S504 and step S505 in this embodiment, and step S504 may be executed first, and then step S505 is executed; step S505 may be executed first, and then step S504 may be executed; step S504 and step S505 may also be executed simultaneously, which is not specifically limited in this embodiment of the application.

Wherein, in the above steps S501 to S507:

optionally, in this embodiment of the application, the frequency domain resources in the first resources are N segments of frequency domain resources, and N is a positive integer smaller than or equal to a third setting value. For example, the third setting value may be 2, and N may take a value of 1 or 2. If the value of N is 1, representing that the frequency domain resource in the first resource is 1 segment of frequency domain resource; or, if the value of N is 2, the frequency domain resource in the first resource is represented as 2 segments of frequency domain resources.

Optionally, in this embodiment of the present application, each segment of frequency domain resources may include one or more (including 2) RB resources, where the plurality of RB resources are consecutive RB resources.

In the present embodiment, the continuous RB resource refers to a frequency domain resource with a continuous RB resource number. For example, as shown in fig. 6a, the RB1 resource, the RB2 resource to the RB3 resource may be regarded as 3 consecutive RB resources, and the RB1 resource and the RB3 resource may be discontinuous RB resources.

For example, assuming that the frequency domain resources in the first resources are 1 segment of frequency domain resources, the schematic location diagram of the frequency domain resources in the first resources may be as shown in fig. 6b or fig. 6 c. Fig. 6b illustrates an example that the frequency domain resource in the first resource includes 1 RB resource; fig. 6c illustrates an example in which the frequency domain resource in the first resource includes a plurality of consecutive RB resources.

Or, for example, assuming that the frequency domain resources in the first resources are 2 segments of frequency domain resources, the schematic location diagram of the frequency domain resources in the first resources may be as shown in fig. 6d or fig. 6e or fig. 6 f. Fig. 6d illustrates that each segment of frequency domain resources includes 1 RB resource; fig. 6e illustrates an example in which 1 segment of frequency domain resources includes 1 RB resource, and in which 1 segment of frequency domain resources includes a plurality of consecutive RB resources; fig. 6f illustrates an example where each segment of frequency domain resources includes a plurality of consecutive RB resources.

Optionally, in this embodiment of the application, the time domain resources in the first resource include all time domain resources (for example, time domain symbols) within a validity period of the first resource, where when the first resource is determined according to the configuration information, after the configuration information is configured, the first resource may be regarded as being within the validity period; when the configuration information is deleted, the first resource may be considered to be not within the validity period. When the first resource is determined according to the configuration information and the DCI, it may be considered that the first resource is within the time domain range of the PDSCH and within the validity period, which is described herein in a unified manner and is not described in detail below.

For example, taking 1 RBG in the frequency domain and 1 slot in the time domain as an example, the schematic location diagram of the first resource may be as shown in fig. 7a or fig. 7 b. In fig. 7a, the frequency domain resources in the first resources are 1 segment of frequency domain resources, and in fig. 7b, the frequency domain resources in the first resources are 2 segments of frequency domain resources.

Optionally, the second resource in this embodiment may include multiple RB resources. For example, the frequency domain scheduling granularity of the PDSCH may be an RBG corresponding to the frequency domain resource scheduling type0 of the PDSCH; alternatively, the frequency domain scheduling granularity of the PDSCH may be a continuous VRB of a segment of downlink BWP corresponding to the frequency domain resource scheduling type1 of the PDSCH, which is not specifically limited in this application.

Optionally, in this embodiment of the application, the third resource is a resource other than an intersection of the first resource and the second resource in the second resource.

Exemplarily, taking a time domain mapping mode of a PDSCH as a mapping type a, and two frequency domain resource scheduling modes of the PDSCH as a type 0 (i.e., RBG granularity) as an example, assuming that a starting symbol is 2 and the number of persistent symbols is 11, a position diagram of a corresponding second resource is as shown in fig. 8, and assuming that a position diagram of a first resource is as shown in fig. 7a, a position diagram of a third resource may be as shown in fig. 9 a; alternatively, assuming that the location map of the first resource is shown in fig. 7b, the location map of the third resource may be shown in fig. 9 b.

Optionally, in this embodiment of the application, the determining, by the terminal device, the second resource may include: and the terminal equipment determines the second resource according to frequency domain resource allocation (frequency domain resource allocation) information and time domain resource allocation (time domain resource allocation) information in the DCI.

Optionally, in this embodiment of the present application, the determining, by the terminal device, the first resource may include: and the terminal equipment determines the first resource according to the configuration information.

Or, optionally, in this embodiment of the application, the determining, by the terminal device, the first resource may include: and the terminal equipment determines the first resource according to the configuration information and the DCI. For example, the terminal device determines the first resource according to the configuration information and the rate matching indication field in the DCI. Wherein, the rate matching indication field in the DCI indicates whether resources in a matching pattern group (rate match pattern group) can be used for DMRS for transmitting PDSCH and PDSCH. One or more rate matching patterns may be included in a rate matching pattern group. For example, if the bit corresponding to one rate matching pattern group is 1, the resource in the rate matching pattern group cannot be used to transmit the PDSCH and the DMRS of the PDSCH. For the description of the rate matching pattern in the embodiment of the present application, reference may be made to the following description, which is not repeated herein.

Optionally, the configuration information in this embodiment may be configured to the terminal device through a higher layer signaling, where the higher layer signaling may be, for example, Radio Resource Control (RRC) signaling or media access control unit (MAC-CE) signaling, and this is not specifically limited in this embodiment.

By way of example, several possible implementations of configuration information are given below:

in a possible implementation manner, the configuration information includes indication information of frequency domain resources in the first resources. The time domain resource in the first resource is default (e.g., specified by a protocol) by the terminal device or the network device, and includes all time domain resources (e.g., time domain symbols) within the validity period of the first resource.

Optionally, the indication information of the frequency domain resource in the first resource may be, for example, a bit map (bitmap) at RB level.

For example, assuming that the RB level bitmap is 00110 … … 11, the location of the first resource on multiple slots (slots) can be schematically shown in fig. 10 a.

Or, for example, assuming that the RB level bitmap is 01110 … … 00, the schematic diagram of the location of the first resource on multiple slots (slots) can be as shown in fig. 10 b.

Or, in another possible implementation manner, the configuration information includes indication information of frequency domain resources in the first resource and indication information of time domain resources in the first resource, where the indication information of time domain resources is used to indicate that the time domain resources in the first resource include all time domain resources within the validity period of the first resource.

Optionally, the indication information of the time domain resource in the first resource may be, for example, a symbol level bitmap, where bit values in the symbol level bitmap are all 1, and bit values in a default (e.g., protocol specification) periodicity and pattern are all 1.

Or, optionally, the indication information of the time domain resource in the first resource may be, for example, a symbol level bitmap and a periodicity and pattern, where bit values in the symbol level bitmap and the periodicity and pattern are all 1.

For example, assuming that the RB level bitmap is 00110 … … 11, the bit values in the symbol level bitmap are all 1, and the bit values in the periodicity and pattern are all 1, the schematic diagram of the position of the first resource on multiple slots (slots) can be as shown in fig. 11 a.

Alternatively, for example, assuming that the RB level bitmap is 01110 … … 00, all the bit values in the symbol level bitmap are 1, and all the bit values in the periodicity and pattern are 1, the schematic diagram of the location of the first resource on multiple slots (slots) can be as shown in fig. 11 b.

Optionally, in this embodiment of the present application, the configuration information is characterized by M rate matching patterns, where M is a positive integer less than or equal to the first setting value. For example, the first setting value may be 2, and M may take a value of 1 or 2. If the value of M is 1, representing that the configuration information is represented by 1 rate matching pattern; or, if the value of M is 2, it indicates that the configuration information is characterized by 2 rate matching patterns.

Optionally, in this embodiment of the present application, if M is greater than 1, frequency domain resources corresponding to the M rate matching patterns may overlap, or may not overlap at all, which is not specifically limited in this embodiment of the present application.

Optionally, a first rate matching pattern of the M rate matching patterns includes S segments of frequency domain resources, where S is a positive integer less than or equal to a second set value. For example, the first set value may be 2, and S may take a value of 1 or 2. If the value of S is 1, indicating that the first rate matching pattern comprises 1 segment of frequency domain resources; or, if the value of S is 2, it indicates that the first rate matching pattern includes 2 segments of frequency domain resources.

For example, if M is 1 and S is 1, the rate matching pattern in the embodiment of the present application may be as shown in fig. 10b or fig. 11 b.

Alternatively, for example, if M is 1 and S is 2, the rate matching pattern in the embodiment of the present application may be as shown in fig. 10a or fig. 11 a.

Of course, if M is 2, each of the 2 rate matching patterns may include 1 segment of frequency domain resources; alternatively, each of the 2 rate matching patterns may comprise 2 segments of frequency domain resources; alternatively, one of the 2 rate matching patterns includes 1 segment of frequency domain resources, and the other rate matching pattern includes 2 segments of frequency domain resources. The 2 rate matching patterns may be the same or different, and this is not particularly limited in the embodiment of the present application.

Optionally, in this embodiment of the application, the first resource is a resource other than resources corresponding to at least one group of rate matching patterns, where the resource corresponding to each group of rate matching patterns in the at least one group of rate matching patterns is a resource that cannot transmit the PDSCH and is indicated by the DCI. For example, the first resource may be a resource other than at least one set of rate matching patterns that cannot transmit the PDSCH, which is indicated by a rate matching indication field in the existing DCI.

Optionally, the PDSCH in the embodiment of the present application belongs to a PDSCH with a mapping type of type a. That is, only the DMRS that maps the PDSCH of type a may overlap with resources that cannot be used to transmit the PDSCH, and the DMRS that maps the PDSCH of type B may not overlap with resources that cannot be used to transmit the PDSCH. In this case, the processing of the PDSCH mapped to type B may refer to the existing protocol scheme, which is not described herein.

Or, optionally, the PDSCH in the embodiment of the present application belongs to a PDSCH of which the mapping type is type B and the persistent time domain resource length is a fourth setting value. That is, only the DMRS for the PDSCH of which the mapping type is type B and the persistent time domain resource length is the fourth setting value may overlap with resources that cannot be used to transmit the PDSCH; the mapping type is type B, and the DMRS of the PDSCH with the continuous time domain resource length of a value beyond a fourth set value cannot overlap with the resources which cannot be used for transmitting the PDSCH. In this case, the mapping type is type B, and the processing of the PDSCH with the persistent time domain resource length being a value other than the fourth set value may refer to the scheme of the existing protocol, which is not described herein again.

Illustratively, the duration time domain resource length here may be, for example, 2 time domain symbols.

Optionally, in this embodiment of the present application, when the DMRS of the PDSCH is in a dual-symbol mode, the DMRS in the dual-symbol mode includes at least one set of dual-symbol DMRSs. If the fourth resource includes a first DMRS symbol corresponding to a set of two-symbol DMRSs on one RB and does not include a second DMRS symbol corresponding to the set of two-symbol DMRSs on the RB, the DMRS on the second DMRS symbol cannot be used for transmitting the PDSCH. And the fourth resource is the intersection of the first resource and the second resource. Optionally, the second DMRS symbol cannot be used for transmitting PDSCH.

That is, DMRS on the second DMRS symbol that cannot be used for transmission of PDSCH and PDSCH; or, the DMRS that cannot be used for transmitting the PDSCH on the second DMRS symbol may be used for transmitting the PDSCH.

Optionally, in this embodiment of the application, the first resource includes one symbol in a time domain and all RBs on one BWP in a frequency domain or all RBs on one carrier, or the first resource includes one RB in the frequency domain and all symbols in the time domain. Or, if the first resource includes one RB in the frequency domain and one symbol in the time domain, it is determined that the first resource includes the symbol and all RBs of one BWP in the frequency domain or all RBs on one carrier, or the first resource includes the RB and all symbols in the time domain.

In a possible implementation manner, in this embodiment of the application, if the resource of the DMRS for transmitting the PDSCH in the second resource overlaps with the first resource, the terminal device or the network device may determine that the resource overlaps in the frequency domain range, and the resource cannot be used for transmitting the PDSCH and the DMRS for the PDSCH within the duration of the second resource; alternatively, in the frequency domain range of the overlapped resource, the DMRS that cannot be used for transmitting the PDSCH can be used for transmitting the PDSCH within the duration of the second resource.

In another possible implementation manner, in this embodiment of the application, if the resource of the DMRS for transmitting the PDSCH in the second resource overlaps with the first resource, the terminal device or the network device may determine that the PDSCH and the DMRS for the PDSCH cannot be transmitted in the frequency domain of the second resource within the time domain range of the overlapped resource; or, in the time domain range of the overlapped resources, and in the frequency domain range of the second resource, the DMRS that cannot be used for transmitting the PDSCH may be used for transmitting the PDSCH.

That is, in the embodiment of the present application, if the resource for transmitting the DMRS for the PDSCH in the second resource and the first resource overlap on one symbol of one RB, the RB on the entire BWP or the RB on the entire carrier on the symbol cannot be used for the DMRS for the PDSCH, and optionally cannot be used for transmitting the PDSCH. Alternatively, all symbols on this RB may not be used to transmit DMRS for PDSCH, and optionally may not be used to transmit PDSCH.

The communication method shown in fig. 5 is described by taking the communication system shown in fig. 2 as an NR system, the downlink data channel as a PDSCH, and the demodulation reference signal of the downlink data channel as a DMRS of the PDSCH as an example. Of course, as described above, the solutions provided in the embodiments of the present application may also be applied to other communication systems, and for the related description, reference may be made to the embodiment shown in fig. 5, which is not described herein again.

Based on the communication method provided by the embodiment of the application, because the first resource in the scheme is a resource which cannot transmit the downlink data channel and the demodulation reference signal of the downlink data channel, the second resource includes a resource for transmitting the downlink data channel scheduled by the DCI and the demodulation reference signal of the downlink data channel, and the third resource is a resource for transmitting the downlink data channel and the demodulation reference signal of the downlink data channel in the second resource, and therefore, in the case where the frequency domain minimum scheduling granularity of the downlink data channel is a plurality of RBs, the plurality of RBs can be scheduled, and receives or transmits the demodulation reference signals of the downlink data channel and the downlink data channel only on the resource (i.e. the third resource) for transmitting the demodulation reference signals of the downlink data channel and the downlink data channel in the second resource, therefore, the utilization rate of resources can be improved on the premise of not influencing the receiving performance of the downlink data channel. For example, as shown in fig. 12, with the communication method provided in the embodiment of the present application, the network device may schedule the whole RBG, and send the PDSCH and the DMRS of the PDSCH on the RB resources other than the N RB resources, and the terminal device may receive the PDSCH and the DMRS of the PDSCH on the RB resources other than the N RB resources, so that the resource utilization rate may be improved without affecting the PDSCH receiving performance.

The processor 301 in the network device 30 shown in fig. 3 may call the application code stored in the memory 302 to instruct the network device to perform the actions of the network device in the above steps S501 to S507, and the processor 401 in the terminal device 40 shown in fig. 3 may call the application code stored in the memory 402 to instruct the network device to perform the actions of the terminal device in the above steps S501 to S507, which is not limited in this embodiment.

It is to be understood that, in the above embodiments, the method and/or the step implemented by the terminal device may also be implemented by a chip system that implements the functions of the terminal device, and the method and/or the step implemented by the network device may also be implemented by a chip system that implements the functions of the network device.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. Correspondingly, the embodiment of the application also provides a communication device, and the communication device is used for realizing the various methods. The communication device may be the terminal device in the above method embodiment or a chip system for implementing the function of the terminal device; alternatively, the communication apparatus may be the network device in the foregoing method embodiment or a chip system that implements the function of the foregoing network device. It is to be understood that the communication device comprises corresponding hardware structures and/or software modules for performing the respective functions in order to realize the above-mentioned functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. 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 application.

In the embodiment of the present application, the communication apparatus may be divided into functional modules according to the method embodiments, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

For example, the communication device is taken as the terminal device in the above method embodiment. Fig. 13 shows a schematic structural diagram of a terminal device 130. The terminal device 130 includes a processing module 1301 and a transceiver module 1302. The transceiver module 1302, which may also be referred to as a transceiver unit, is used to implement a transmitting and/or receiving function, and may be, for example, a transceiver circuit, a transceiver, or a communication interface.

The transceiver module 1302 is configured to receive configuration information from a network device; the transceiver module 1302 is further configured to receive downlink control information from a network device; a processing module 1301, configured to determine a first resource according to the configuration information, where the first resource is a resource incapable of transmitting a downlink data channel and a demodulation reference signal of the downlink data channel; the processing module 1301 is further configured to determine a second resource according to the downlink control information, where the second resource includes a resource used for transmitting a downlink data channel and a demodulation reference signal of the downlink data channel; the processing module 1301 is further configured to determine a third resource according to the first resource and the second resource, where the third resource is a resource used for transmitting a downlink data channel and a demodulation reference signal of the downlink data channel in the second resource; the transceiver module 1302 is further configured to receive a downlink data channel from the network device and a demodulation reference signal of the downlink data channel on the third resource.

All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the present embodiment, the terminal device 130 is presented in a form of dividing each functional module in an integrated manner. A "module" herein may refer to a particular ASIC, a circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that provides the described functionality. In a simple embodiment, those skilled in the art will appreciate that the terminal device 130 may take the form of the terminal device 40 shown in fig. 3.

For example, the processor 401 in the terminal device 40 shown in fig. 3 may execute the instructions by calling a computer stored in the memory 402, so that the terminal device 40 executes the communication method in the above-described method embodiment.

Specifically, the functions/implementation procedures of the processing module 1301 and the transceiver module 1302 in fig. 13 can be implemented by the processor 401 in the terminal device 40 shown in fig. 3 calling the computer execution instructions stored in the memory 402. Alternatively, the function/implementation procedure of the processing module 1301 in fig. 13 may be implemented by the processor 401 in the terminal device 40 shown in fig. 3 calling a computer executing instruction stored in the memory 402, and the function/implementation procedure of the transceiver module 1302 in fig. 13 may be implemented by the transceiver 403 in the terminal device 40 shown in fig. 3.

Since the terminal device 130 provided in this embodiment can execute the above communication method, the technical effects obtained by the terminal device can refer to the above method embodiment, and are not described herein again.

Or, for example, the communication device is taken as the network device in the above method embodiment. Fig. 14 shows a schematic structural diagram of a network device 140. The network device 140 includes a processing module 1401 and a transceiver module 1402. The transceiver module 1402, which may also be referred to as a transceiver unit, may be a transceiver circuit, a transceiver or a communication interface, for example.

The transceiver module 1402 is configured to send configuration information to the terminal device, where the configuration information is used to determine a first resource, and the first resource is a resource that cannot transmit a downlink data channel and a demodulation reference signal of the downlink data channel; the transceiver module 1402 is further configured to send downlink control information to the terminal device, where the downlink control information is used to determine a second resource, and the second resource includes a resource used to transmit a downlink data channel and a demodulation reference signal of the downlink data channel; a processing module 1401, configured to determine a third resource according to the first resource and the second resource, where the third resource is a resource used for transmitting a downlink data channel and a demodulation reference signal of the downlink data channel in the second resource; the transceiver module 1402 is further configured to send the downlink data channel and the demodulation reference signal of the downlink data channel to the terminal device on the third resource.

In the present embodiment, the network device 140 is presented in a form of dividing each functional module in an integrated manner. A "module" herein may refer to a particular ASIC, a circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that provides the described functionality. In a simple embodiment, those skilled in the art will appreciate that the network device 140 may take the form of the network device 30 shown in FIG. 3.

For example, the processor 301 in the network device 30 shown in fig. 3 may execute the instructions by calling a computer stored in the memory 302, so that the network device 30 executes the communication method in the above method embodiment.

Specifically, the functions/implementation procedures of the processing module 1401 and the transceiver module 1402 in fig. 14 may be implemented by the processor 301 in the network device 30 shown in fig. 3 calling the computer execution instructions stored in the memory 302. Alternatively, the function/implementation procedure of the processing module 1401 in fig. 14 may be implemented by the processor 301 in the network device 30 shown in fig. 3 calling a computer executing instruction stored in the memory 302, and the function/implementation procedure of the transceiver module 1402 in fig. 14 may be implemented by the transceiver 303 in the network device 30 shown in fig. 3.

Since the network device 140 provided in this embodiment can execute the above-mentioned communication method, the technical effects obtained by the network device 140 can refer to the above-mentioned method embodiment, and are not described herein again.

Optionally, an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a system-on-chip), where the communication device includes a processor, and is configured to implement the method in any of the above method embodiments. In one possible design, the communication device further includes a memory. The memory for storing the necessary program instructions and data, the processor may call the program code stored in the memory to instruct the communication device to perform the method of any of the above-described method embodiments. Of course, the memory may not be in the communication device. When the communication device is a chip system, the communication device may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in this embodiment of the present application.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or can comprise one or more data storage devices, such as a server, a data center, etc., that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others. In the embodiment of the present application, the computer may include the aforementioned apparatus.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

BWP bandwidth

Configuration

Configuration 2

1. A method of communication, the method comprising:

the terminal equipment receives configuration information from the network equipment;

the terminal equipment receives downlink control information from the network equipment;

the terminal equipment determines a first resource according to the configuration information, wherein the first resource is a resource which can not transmit a downlink data channel and a demodulation reference signal of the downlink data channel;

the terminal equipment determines a second resource according to the downlink control information, wherein the second resource comprises a resource used for transmitting the downlink data channel and a demodulation reference signal of the downlink data channel;

the terminal device determines a third resource according to the first resource and the second resource, where the third resource is a resource used for transmitting the downlink data channel and a demodulation reference signal of the downlink data channel in the second resource;

and the terminal equipment receives the downlink data channel from the network equipment and the demodulation reference signal of the downlink data channel on the third resource.

2. The method of claim 1, wherein the determining, by the terminal device, the first resource according to the configuration information comprises:

And the terminal equipment determines the first resource according to the configuration information and the downlink control information.

3. The method according to claim 1 or 2, wherein the configuration information comprises indication information of frequency domain resources in the first resource;

wherein the time domain resources in the first resources include all time domain resources within the validity period of the first resources.

4. The method according to claim 1 or 2, wherein the configuration information includes indication information of frequency domain resources in the first resource and indication information of time domain resources in the first resource, and wherein the indication information of time domain resources is used to indicate that the time domain resources in the first resource include all time domain resources within the validity period of the first resource.

5. The method according to any of claims 1-4, wherein the configuration information is characterized by M rate matching patterns, M being a positive integer less than or equal to the first set point.

6. The method of claim 5, wherein a first rate matching pattern of the M rate matching patterns comprises S segments of frequency domain resources, S being a positive integer less than or equal to a second set value.

7. The method according to any of claims 1-6, wherein the frequency domain resources in the first resources are N segments of frequency domain resources, where N is a positive integer less than or equal to a third set value.

8. The method according to any of claims 1-7, wherein the first resource is a resource other than resources corresponding to at least one set of rate matching patterns, and wherein the resources corresponding to the at least one set of rate matching patterns are resources that cannot transmit the downlink data channel indicated by the downlink control information.

9. The method according to any of claims 1-8, wherein the downlink data channel belongs to a downlink data channel with a mapping type of type a.

10. The method according to any of claims 1-8, wherein the downlink data channel belongs to a downlink data channel with a mapping type of type B and a persistent time domain resource length of a fourth set value.

11. A method of communication, the method comprising:

the method comprises the steps that network equipment sends configuration information to terminal equipment, wherein the configuration information is used for determining a first resource, and the first resource is a resource which cannot transmit a downlink data channel and a demodulation reference signal of the downlink data channel;

The network equipment sends downlink control information to the terminal equipment, wherein the downlink control information is used for determining second resources, and the second resources comprise resources used for transmitting the downlink data channel and demodulation reference signals of the downlink data channel;

the network device determines a third resource according to the first resource and the second resource, where the third resource is a resource used for transmitting the downlink data channel and a demodulation reference signal of the downlink data channel in the second resource;

and the network equipment sends the downlink data channel and the demodulation reference signal of the downlink data channel to the terminal equipment on the third resource.

12. The method of claim 11, wherein the downlink control information is further used for determining the first resource.

13. The method according to claim 11 or 12, wherein the configuration information comprises indication information of frequency domain resources in the first resource;

14. The method according to claim 11 or 12, wherein the configuration information includes indication information of frequency domain resources in the first resource and indication information of time domain resources in the first resource, and wherein the indication information of time domain resources is used to indicate that the time domain resources in the first resource include all time domain resources within the validity period of the first resource.

15. The method according to any of claims 11-14, wherein the configuration information is characterized by M rate matching patterns, M being a positive integer less than or equal to the first set point.

16. The method of claim 15, wherein a first rate matching pattern of the M rate matching patterns comprises S segments of frequency domain resources, S being a positive integer less than or equal to a second set value.

17. The method according to any of claims 11-16, wherein the frequency domain resources in the first resources are N segments of frequency domain resources, where N is a positive integer less than or equal to a third set value.

18. The method according to any of claims 11-17, wherein the first resource is a resource other than resources corresponding to at least one set of rate matching patterns, and wherein the resources corresponding to the at least one set of rate matching patterns are resources that cannot transmit the downlink data channel indicated by the downlink control information.

19. The method according to any of claims 11-18, wherein the downlink data channel belongs to a downlink data channel with a mapping type of type a.

20. The method according to any of claims 11-18, wherein the downlink data channel belongs to a downlink data channel with a mapping type of type B and a persistent time domain resource length of a fourth set value.

21. A terminal device, characterized in that the terminal device comprises: the device comprises a processing module and a transmitting-receiving module;

the transceiver module is used for receiving configuration information from network equipment;

the transceiver module is further configured to receive downlink control information from the network device;

the processing module is configured to determine a first resource according to the configuration information, where the first resource is a resource incapable of transmitting a downlink data channel and a demodulation reference signal of the downlink data channel;

the processing module is further configured to determine a second resource according to the downlink control information, where the second resource includes a resource used for transmitting the downlink data channel and a demodulation reference signal of the downlink data channel;

the processing module is further configured to determine a third resource according to the first resource and the second resource, where the third resource is a resource used for transmitting the downlink data channel and a demodulation reference signal of the downlink data channel in the second resource;

the transceiver module is further configured to receive, on the third resource, the downlink data channel and a demodulation reference signal of the downlink data channel from the network device.

22. The terminal device according to claim 21, wherein the terminal device is further configured to perform the method according to any of claims 2-10.

23. A network device, characterized in that the network device comprises: the device comprises a processing module and a transmitting-receiving module;

the transceiver module is configured to send configuration information to a terminal device, where the configuration information is used to determine a first resource, where the first resource is a resource incapable of transmitting a downlink data channel and a demodulation reference signal of the downlink data channel;

the transceiver module is further configured to send downlink control information to the terminal device, where the downlink control information is used to determine a second resource, and the second resource includes a resource used to transmit the downlink data channel and a demodulation reference signal of the downlink data channel;

the processing module is configured to determine a third resource according to the first resource and the second resource, where the third resource is a resource used for transmitting the downlink data channel and a demodulation reference signal of the downlink data channel in the second resource;

the transceiver module is further configured to send the downlink data channel and the demodulation reference signal of the downlink data channel to the terminal device on the third resource.

24. The network device of claim 23, wherein the network device is further configured to perform the method of any of claims 12-20.