CN111918393B

CN111918393B - Transmission method of downlink data channel, communication device and computer storage medium

Info

Publication number: CN111918393B
Application number: CN201910382411.4A
Authority: CN
Inventors: 花梦
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2022-05-06
Anticipated expiration: 2039-05-09
Also published as: CN111918393A

Abstract

The application provides a transmission method of a downlink data channel, a communication device and a computer storage medium. The transmission method comprises the following steps: receiving time-frequency resource configuration information of a downlink data channel from access network equipment to acquire a first time-frequency resource for transmitting the downlink data channel; receiving time-frequency resource configuration information of a downlink control channel from access network equipment to acquire a second time-frequency resource for transmitting the downlink control channel; and receiving the downlink data channel in a third time frequency resource, wherein the third time frequency resource is part or all of a first time frequency resource block in the second time frequency resource, the first time frequency resource block comprises a time frequency resource of a downlink control channel for scheduling the downlink data channel, the first time frequency resource block is overlapped with the first time frequency resource, and the third time frequency resource is not overlapped with the first time frequency resource. According to the method and the device, the idle time-frequency resources are utilized to transmit the downlink data channel, so that the utilization rate of the resources can be improved.

Description

Transmission method of downlink data channel, communication device and computer storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a transmission technology of a downlink data channel.

Background

In the current communication protocol, the access network device usually configures a time-frequency resource dedicated to transmitting a downlink data channel for the terminal device. Generally, the terminal device can only transmit the downlink data channel by using the configured time-frequency resources, which results in lower transmission efficiency of the downlink data channel. Therefore, how to better perform the transmission of the downlink data channel is a problem to be solved.

Disclosure of Invention

The application provides a transmission method of a downlink data channel, a communication device and a computer storage medium, so as to improve the utilization efficiency of time-frequency resources.

In a first aspect, a method for receiving a downlink data channel is provided, where the method includes: receiving time-frequency resource configuration information of a downlink data channel from access network equipment, wherein the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is a time-frequency resource used for transmitting the downlink data channel; receiving time-frequency resource configuration information of a downlink control channel from access network equipment, wherein the time-frequency resource configuration information of the downlink control channel indicates a second time-frequency resource, the second time-frequency resource is used for transmitting the time-frequency resource of the downlink control channel, the second time-frequency resource comprises a first time-frequency resource block, the first time-frequency resource block comprises the time-frequency resource of the downlink control channel of a scheduling downlink data channel, and the first time-frequency resource block and the first time-frequency resource are overlapped; and receiving a downlink data channel in a third time frequency resource, wherein the third time frequency resource is part or all of the first resource block, and the third time frequency resource is not overlapped with the first time frequency resource.

It should be understood that, the third time-frequency resource is a part or all of the first time-frequency resource block means that the third time-frequency resource is located inside the first time-frequency resource block, that is, the time domain range of the third time-frequency resource is smaller than or equal to the time domain range of the first time-frequency resource block, and the frequency domain resource width of the third time-frequency resource is smaller than or equal to the frequency domain resource width of the first time-frequency resource block.

The second time frequency resource may include a plurality of time frequency resource blocks, and the first time frequency resource block is one of the plurality of time frequency resource blocks. In addition, the first time-frequency resource block is a time-frequency resource block, and the first time-frequency resource block includes both time domain resources and frequency domain resources.

It should be understood that in the present application, a first time-frequency resource block is a "block" of time-frequency resources in a second time-frequency resource, which is typically composed of a plurality of such time-frequency resource blocks. The first time-frequency resource is a time-frequency resource used for transmitting a downlink data channel, and the first time-frequency resource block and the first time-frequency resource belong to different types of time-frequency resources.

In addition, the time frequency resource block in the present application is also different from a Resource Block (RB), where the RB is a basic unit constituting a time frequency resource, and the multiple time frequency resource blocks mentioned in the present application refer to multiple "blocks" of time frequency resources constituting a second time frequency resource.

Optionally, the third time-frequency resource is a part of the first time-frequency resource block, which is located outside the first time-frequency resource.

In the application, the downlink data channel is received by using the third time-frequency resource located outside the first time-frequency resource in the first time-frequency resource block, so that the utilization rate of the resource can be improved.

Furthermore, by using the third time-frequency resource to transmit the downlink data channel, more time-frequency resources can be scheduled to transmit the downlink data channel, and the transmission efficiency of the downlink data channel can be improved to a certain extent.

Optionally, the method further includes: and determining the third time-frequency resource according to the first time-frequency resource and the first time-frequency resource block.

Specifically, after the first time-frequency resource and the first time-frequency resource block are obtained, at least a part of the time-frequency resources in the time-frequency resource block that do not overlap with the first time-frequency resource may be determined as the third time-frequency resource.

The main body of the above method may be a communication device, and the communication device may be a terminal device (the terminal device may specifically include a device as shown in the third paragraph of the detailed description).

Specifically, for the current communication device, a downlink data channel received by the communication device generally has a corresponding downlink control channel (the downlink control channel is used for scheduling the downlink data channel), the downlink control channel is generally located in a second time-frequency resource (e.g., a CORESET resource), and the downlink control channel is generally distributed in the second time-frequency resource in a discrete manner, which may cause the second time-frequency resource to be scattered by the downlink control channel, so that a time-frequency unit (e.g., a REG bundle) including the downlink control channel resource in the second time-frequency resource cannot be allocated to other communication devices, resulting in resource waste. In the application, the downlink data channel is received by using the third time-frequency resource, the first time-frequency resource block can be located outside the first time-frequency resource, and the resource which cannot be allocated to other communication devices is allocated to the current communication device to receive the downlink data channel, so that the waste of the second time-frequency resource can be reduced, and the utilization rate of the second time-frequency resource is improved.

Wherein a group of REGs may form a REG bundle (english name: REG bundle). In general, {2,3,6} REGs may be contained in one REG bundle.

Optionally, the method further includes: and receiving the downlink data channel in the first time-frequency resource.

It should be understood that, in addition to receiving the downlink data channel by using the third time frequency resource, the present solution may also receive the downlink data channel based on the originally allocated first time frequency resource, and compared with the existing solution, more time frequency resources may be called to receive the downlink data channel, so that the transmission of the downlink data channel may be better performed.

Optionally, the downlink data channel is a Physical Downlink Shared Channel (PDSCH).

Optionally, the first time-frequency resource is a time-frequency resource for transmitting a PDSCH.

Optionally, the second time-frequency resource is a resource corresponding to a control resource set (CORESET).

Optionally, the downlink control channel is a Physical Downlink Control Channel (PDCCH).

Optionally, the time-frequency resource configuration information of the downlink data channel is carried in Downlink Control Information (DCI) received from the access network device.

Specifically, the time-frequency resource configuration information of the downlink data channel may be frequency domain resource allocation information (frequency domain resource allocation) and time domain resource allocation information (time domain resource allocation) carried in DCI.

The frequency domain resource allocation information in the time frequency resource allocation information of the downlink data channel indicates the frequency domain resource of the first time frequency resource, and the time domain resource allocation information in the time frequency resource allocation information of the downlink data channel indicates the time domain resource of the first time frequency resource.

Optionally, the time-frequency resource configuration information of the downlink control channel includes control resource set information (ControlResourceSet or ControlResourceSetZero) and search space information (SearchSpace or SearchSpaceZero).

The control resource set information is used for determining the size of the time domain resource and the size of the frequency domain resource of the resource block of the second time frequency resource, and the search space information is used for determining the position of the time domain resource of the resource block of the second time frequency resource.

Therefore, the time domain range and the frequency domain range of each time frequency resource block in the second time frequency resource can be determined according to the control resource set information and the search space information.

With reference to the first aspect, in some implementations of the first aspect, the third time-frequency resource includes a partial time-frequency resource of each of at least one fourth time-frequency resource;

the first time-frequency resource block comprises at least one fourth time-frequency resource, the time domain range of each fourth time-frequency resource in the at least one fourth time-frequency resource is the same as the time domain range of the first time-frequency resource block, the frequency domain resource width of each fourth time-frequency resource in the at least one fourth time-frequency resource is a plurality of Resource Blocks (RBs), and each fourth time-frequency resource in the at least one fourth time-frequency resource comprises a part of time-frequency resources of a downlink control channel for scheduling a downlink data channel;

and the partial time frequency resources of each fourth time frequency resource do not overlap with the first time frequency resources, and the partial time frequency resources of each fourth time frequency resource do not comprise the time frequency resources of a downlink control channel for scheduling a downlink data channel and the time frequency resources of a demodulation reference signal of the downlink control channel.

Assuming that the execution subject of the method is the current communication device, the fourth time-frequency resource includes the time-frequency resource of the downlink control channel and the time-frequency resource of the demodulation reference signal of the downlink control channel, and therefore, the fourth time-frequency resource cannot be allocated to other communication devices except the current communication device. In the present application, the fourth time-frequency resource is allocated to the current communication apparatus, so that the current communication apparatus can transmit the downlink data channel by using the resource in the fourth time-frequency resource, which can improve the utilization rate of the resource. Furthermore, in the present application, by using a part of the time-frequency resources in the fourth time-frequency resources to receive the downlink data channel, interference caused to transmission of the downlink control channel or the demodulation reference signal when the downlink data channel is received can be reduced or avoided.

With reference to the first aspect, in certain implementations of the first aspect, the frequency domain range of the partial time-frequency resources of each fourth time-frequency resource is within the frequency domain range of the first time-frequency resource.

When part of the frequency domain resources of the fourth time frequency resources are in the frequency domain range of the first time frequency resources, the resources in the same frequency domain range as the first time frequency resources can be adopted to receive the downlink data channel, and the receiving effect of the downlink data channel can be improved.

With reference to the first aspect, in certain implementation manners of the first aspect, a frequency domain resource width of each of the at least one fourth time frequency resource is a Resource Block Group (RBG), or the frequency domain resource width of each of the at least one fourth time frequency resource is a part of an RBG, or the frequency domain resource width of a part of the fourth time frequency resource is an RBG, and the frequency domain resource width of a part of the fourth time frequency resource is a part of an RBG.

For example, the second time-frequency resources collectively include two fourth time-frequency resources, then the frequency domain resource width of each of the two fourth time-frequency resources is one RBG, or the frequency domain resource width of each of the two fourth time-frequency resources is a part of one RBG, or the frequency domain resource width of one of the two fourth time-frequency resources is one RBG, and the frequency domain resource width of the other fourth time-frequency resource is a part of one RBG.

Therefore, the frequency domain resource width of the fourth time-frequency resource may not be a complete RBG, mainly, in some cases, RBs in the second time-frequency resource are discontinuous or segmented, and in addition, an RBG may also be composed of a plurality of RBs (for example, one RBG is composed of 16 RBs), so that the fourth time-frequency resource with the time-frequency resource width less than one RBG may appear on the second time-frequency resource.

With reference to the first aspect, in some implementation manners of the first aspect, the precoding granularity corresponding to the second time-frequency resource is a Resource Element Group (REG) bundle.

Assuming that the main execution body of the method is the current communication device, when the precoding granularity corresponding to the second time-frequency resource is the REG bundle, the REG bundle including the downlink control channel only includes the demodulation reference signal of the downlink data channel, and for the REG bundle including the downlink data channel and the corresponding demodulation reference signal, the other idle resources except the resource corresponding to the downlink data channel and the corresponding demodulation reference signal cannot be allocated to other communication devices except the current communication device.

With reference to the first aspect, in some implementations of the first aspect, mapping of Control Channel Elements (CCEs) to REGs in the second time-frequency resource is interleaved.

Assuming that the execution subject of the method is the current communication device, in the interleaving mode, the time-frequency resources of the downlink data channel are distributed in the second time-frequency resources more dispersedly, so that many REG bundles in the second time-frequency resources cannot be scheduled to other communication devices except the current communication device.

With reference to the first aspect, in some implementation manners of the first aspect, the precoding granularity corresponding to the second time-frequency resource is all consecutive RBs.

When the precoding granularity corresponding to the second time-frequency resource is all continuous RBs, all time-frequency resources in the first time-frequency resource block, which are located outside the first time-frequency resource, may be used as third time-frequency resources, and at this time, the third time-frequency resources may all be used to be allocated to the current communication device for transmitting a downlink data channel, which may improve the utilization rate of resources.

In a second aspect, a method for transmitting a downlink data channel is provided, where the method includes: sending time-frequency resource configuration information of a downlink data channel to a communication device, wherein the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is a time-frequency resource used for transmitting the downlink data channel; sending time-frequency resource configuration information of a downlink control channel to a communication device, wherein the time-frequency resource configuration information of the downlink control channel indicates a second time-frequency resource, the second time-frequency resource comprises a first time-frequency resource block, the first time-frequency resource block comprises a time-frequency resource of a downlink control channel for scheduling the downlink data channel, and the first time-frequency resource block and the first time-frequency resource are overlapped; and sending a downlink data channel to the communication device in a third time-frequency resource, wherein the third time-frequency resource is part or all of the first time-frequency resource block, and the third time-frequency resource is not overlapped with the first time-frequency resource.

In the application, the downlink data channel is sent by using the third time frequency resource located outside the first time frequency resource block in the second time frequency resource, so that the utilization rate of the resource can be improved.

The method in the second aspect may be performed by an access network device, and the specific form of the access network device may be as shown in the fourth paragraph of the specific embodiment.

With reference to the second aspect, in some implementations of the second aspect, the third time-frequency resource includes a partial time-frequency resource of each of at least one fourth time-frequency resource;

the second time-frequency resource comprises at least one fourth time-frequency resource, the time domain range of each fourth time-frequency resource in the at least one fourth time-frequency resource is the same as the time domain range of the first time-frequency resource block, the frequency domain resource width of each fourth time-frequency resource in the at least one fourth time-frequency resource is a plurality of RBs, and each fourth time-frequency resource in the at least one fourth time-frequency resource comprises a part of time-frequency resources of a downlink control channel for scheduling a downlink data channel;

With reference to the second aspect, in some implementations of the second aspect, the frequency domain range of the partial time-frequency resource of each fourth time-frequency resource is within the frequency domain range of the first time-frequency resource.

With reference to the second aspect, in some implementations of the second aspect, a frequency domain resource width of each of the at least one fourth time frequency resource is one RBG, or a frequency domain resource width of each of the at least one fourth time frequency resource is a part of one RBG, or a frequency domain resource width of a part of the fourth time frequency resource is one RBG, and a frequency domain resource width of a part of the fourth time frequency resource is a part of one RBG.

With reference to the second aspect, in some implementation manners of the second aspect, the precoding granularity corresponding to the second time-frequency resource is an REG bundle.

With reference to the second aspect, in some implementations of the second aspect, the mapping of CCEs to REGs in the second time-frequency resource is interleaved.

It should be understood that the method for transmitting the downlink data channel in the second aspect corresponds to the method for receiving the downlink data channel in the first aspect, and the downlink data channel received in the method in the first aspect may be the downlink data channel transmitted by the method in the second aspect. The above definitions and explanations of the relevant contents of the first aspect and the various implementations in the first aspect also apply to the second aspect and the various implementations in the second aspect.

In a third aspect, a communication device is provided, where the communication device includes a module corresponding to the method/operation/step/action described in the first aspect, and the module may be a hardware circuit, or may be a software circuit, or may be implemented by a hardware circuit and a software combination.

The communication apparatus in the third aspect may specifically be a terminal device, and may also be a chip applied to the terminal device.

In a fourth aspect, a communication device is provided, which includes a module corresponding to the method/operation/step/action described in the second aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit.

The communication device in the fourth aspect may specifically be an access network device, and may also be a chip applied to the access network device.

In a fifth aspect, a communication device is provided that includes a processor and a transceiver, and may further include a memory. The processor is configured to invoke the program code stored in the memory to perform some or all of the operations in any of the manners described above in connection with the first aspect.

In particular, the transceiver and the processor are configured to perform some or all of the operations in any of the above-described first aspects when the processor invokes the program code stored in the memory.

Optionally, the memory is a non-volatile memory.

Optionally, the memory and the processor are coupled to each other.

The communication device in the fifth aspect may specifically be a terminal device, and may also be a chip applied to the terminal device.

In a sixth aspect, a communications apparatus is provided that includes a processor and a transceiver, and may further include a memory. The processor is configured to call the program code stored in the memory to perform part or all of the operations of any one of the above-described second aspects.

In particular, the transceiver and the processor are adapted to perform some or all of the operations of any of the above described second aspects when the processor invokes the program code stored in the memory.

Optionally, the memory is a non-volatile memory.

Optionally, the memory and the processor are coupled to each other.

The communication device in the sixth aspect may specifically be an access network device, and may also be a chip applied to the access network device.

In a seventh aspect, this application provides a computer-readable storage medium storing program code, where the program code includes instructions for performing part or all of the steps of any one of the methods in the first and second aspects.

Optionally, the computer readable storage medium is located in an access network device or a terminal device.

In an eighth aspect, embodiments of the present application provide a computer program product, which when run on a computer, causes the computer to perform some or all of the steps of any one of the methods of the first and second aspects.

In a ninth aspect, there is provided a chip comprising a processor configured to perform some or all of the operations of any one of the first and second aspects.

Optionally, the chip is located inside the terminal device or the access network device.

When the chip is located inside a terminal device, the terminal device including the chip may be configured to perform part or all of the operations in any manner of the first aspect.

When the chip is located inside an access network device, the access network device including the chip may be configured to perform some or all of the operations in any manner of the second aspect.

Drawings

FIG. 1 is a schematic diagram of a scenario in which embodiments of the present application may be applied;

fig. 2 is a schematic flow chart of a transmission method of a downlink data channel according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a first time-frequency resource;

FIG. 4 is a diagram of a second time-frequency resource;

FIG. 5 is a diagram illustrating resource blocks corresponding to a control resource set;

FIG. 6 is a schematic diagram of a third time-frequency resource;

FIG. 7 is a schematic diagram of a fourth time-frequency resource in a first time-frequency resource block;

fig. 8 is a schematic diagram of a part of time-frequency resources in a fourth time-frequency resource;

fig. 9 is a schematic diagram of a part of time-frequency resources in a fourth time-frequency resource;

fig. 10 is a schematic diagram of a part of time-frequency resources in a fourth time-frequency resource;

FIG. 11 is a diagram of a second time-frequency resource block and a first time-frequency resource;

FIG. 12 is a diagram of a second time-frequency resource block and a first time-frequency resource;

FIG. 13 is a diagram illustrating a fourth time-frequency resource and a first time-frequency resource in a second time-frequency resource block;

fig. 14 is a schematic diagram of a fourth time-frequency resource and a first time-frequency resource in a second time-frequency resource block;

fig. 15 is a schematic block diagram of a communication apparatus of an embodiment of the present application;

fig. 16 is a schematic block diagram of a communication apparatus of an embodiment of the present application;

fig. 17 is a schematic block diagram of a communication apparatus of an embodiment of the present application;

fig. 18 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, a New Radio (NR) system in a fifth generation (5G) mobile communication system, or a future mobile communication system, etc.

The Terminal device in the embodiment of the present application may also be referred to as a Terminal, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and the like. The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, 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 surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in home (smart home) (e.g., internet of things device, wearable device), and so on. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

The access network device in the embodiment of the present application is an access device in which a terminal device is wirelessly accessed to the mobile communication system, and may be a base station NodeB, an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), a next generation base station (next generation NodeB, gNB) in a 5G mobile communication system, a base station in a future mobile communication system, an access node or a relay station in a WiFi system, and the like; or may be a module or a unit that performs part of the functions of the base station, for example, a Centralized Unit (CU) or a Distributed Unit (DU). The embodiment of the present application does not limit the specific technology and the specific device form adopted by the access network device.

In the embodiment of the present application, the terminal device or the access network device may include a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer may include hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer may include applications such as a browser, an address book, word processing software, and instant messaging software. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided in the embodiment of the present application, as long as the execution main body can perform communication according to the method provided in the embodiment of the present application by running and recording a program corresponding to the method provided in the embodiment of the present application, for example, the execution main body of the method provided in the embodiment of the present application may be a terminal device or an access network device, or a functional module, such as a chip, in the terminal device or the access network device.

Various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "computer-readable storage medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

For better understanding of the embodiment of the present application, a brief description is given below of a possible application scenario of the embodiment of the present application with reference to fig. 1.

Fig. 1 is a schematic diagram of a scenario in which an embodiment of the present application may be applied.

Fig. 1 is a schematic architecture diagram of a mobile communication system suitable for use in the embodiments of the present application. As shown in fig. 1, the mobile communication system includes a core network device 110, an access network device 120, and at least one terminal device (e.g., a terminal device 130 and a terminal device 140 in fig. 1). The terminal equipment is connected with the access network equipment in a wireless mode, and the access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the access network device may be separate physical devices, or the function of the core network device and the logical function of the access network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the access network device. The terminal equipment may be fixed or mobile. Fig. 1 is a schematic diagram, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1. The embodiments of the present application do not limit the number of core network devices, access network devices, and terminal devices included in the mobile communication system. The access network device in fig. 1 may send a downlink control channel to the terminal device, and then send a downlink data channel to the terminal device.

The transmission method of the downlink data channel according to the embodiment of the present application may be applied in the scenario shown in fig. 1, and when the reception method of the downlink data channel according to the embodiment of the present application is applied in the scenario shown in fig. 1, the terminal device 130 and the terminal device 140 may be an execution main body of the reception method of the downlink data channel according to the embodiment of the present application, that is, the terminal device 130 or the terminal device 140 may receive the downlink data channel sent by the access network device 120.

When the method for sending a downlink data channel according to the embodiment of the present application is applied to the scenario shown in fig. 1, the access network device 120 or the chip in the access network device 120 may be an execution main body of the method for sending a downlink data channel according to the embodiment of the present application, that is, the access network device 120 or the chip in the access network device 120 may be capable of sending a downlink data channel to the terminal device 130 and the terminal device 140.

In NR, one PDCCH may include L ═ {1,2,4,8,16} Control Channel Elements (CCEs). Here, L is referred to as an Aggregation Level (AL) of the PDCCH.

One CCE contains 6 resource-element groups (REGs), each REG corresponding to one Resource Block (RB) on one orthogonal frequency-division multiplexing (OFDM) symbol (symbol).

One PDCCH candidate (PDCCH candidate) may include L ═ {1,2,4,8,16} CCEs, and one PDCCH candidate may or may not transmit a PDCCH of one UE. The UE may detect one PDCCH candidate to determine whether there is a PDCCH transmitted to itself.

For a search space with AL L, a set of PDCCH candidates with AL L may be defined. Where one set of search spaces (SearchSpaceSet) is a set of different ALs. One SearchSpaceSet corresponds to one control resource set (CORESET).

CORESET is a concept introduced in NR system, wherein a parameter of CORESET with ID of controlresourcesettid can be configured in RRC information element ControlResourceSet or controlresourcesetzro (when configured with controlresourcesetzro, controlresourcesettid is 0).

When configuring the CORESET with ControlResourceSeet/ControlResourceSetzero, the parameters of CORESET can be as shown in Table 1.

TABLE 1

As shown in table 1, the control resource set (controlresourceseset) is an Information Element (IE) containing various parameters, and the control resource set 0(ControlResourceSetZero) is a configured parameter with an ID of 0 in the CORESET. The time-frequency resource block size of the CORESET can be determined according to the frequency domain parameters and the time domain interval parameters of the CORESET shown in the table 1.

One SearchSpaceSet can and only corresponds to one CORESET, and one CORESET can correspond to multiple searchspacesets.

A searchbaceset may be configured by the RRC information unit searchbace or searchbacezero.

When configured by SearchSpace, SearchSpace set contains the following parameters:

monitoringslotpriodicityandoffset: a period in slots and an initial slot offset;

duration: the number of slots which are continuous in one period;

monitorngsymbols within slot: a bitmap indicates the starting symbol in each slot (there may be multiple starting symbols in a slot);

this IE may contain the time domain information of SearchSpaceSet 0 when configured by SearchSpaceZero.

It should be understood that the communication system shown in fig. 1 only shows a certain access network device and a certain terminal device, and in fact, the embodiment of the present application may also be applied to a scenario that includes a plurality of terminal devices, and each terminal device may independently execute the receiving method of the downlink data channel in the embodiment of the present application.

In this application, the downlink control channel may be a control channel used to schedule a downlink data channel, where the downlink control channel may specifically be a PDCCH, and the downlink data channel may specifically be a PDSCH.

In this application, a plurality may mean two or more.

The following describes in detail a transmission method of a downlink data channel according to an embodiment of the present application with reference to fig. 2. The method shown in fig. 2 includes both transmission and reception of the downlink data channel. The method shown in fig. 2 may be performed by a communication apparatus, which may be a terminal device (the terminal device may specifically include a device as shown in the third section of the detailed description). The method shown in fig. 2 comprises steps 1001 to 1003, which are described in detail below.

1001. The access network equipment sends the time-frequency resource configuration information of the downlink data channel to the communication device, and the communication device receives the time-frequency resource configuration information of the downlink data channel.

The time-frequency resource configuration information (for) of the downlink data channel indicates a first time-frequency resource, which is a time-frequency resource for transmitting the downlink data channel. That is, the first time-frequency resource may be a time-frequency resource allocated by the access network device to the communication apparatus for the communication apparatus to receive the downlink data channel from the access network device.

The time-frequency resource configuration information of the downlink data channel in step 1001 may be carried in Downlink Control Information (DCI) received from the access network device.

Fig. 3 is a schematic diagram of the first time-frequency resource, where when the time-frequency resource configuration information of the downlink data channel is carried in DCI, the frequency domain resource allocation information in the time-frequency resource configuration information of the downlink data channel indicates the frequency domain resource of the first time-frequency resource, and the time domain resource allocation information in the time-frequency resource configuration information of the downlink data channel indicates the time domain resource of the first time-frequency resource. The frequency domain resource and the time domain resource of the first time frequency resource can be determined through the frequency domain resource allocation information and the time domain resource allocation information in the time domain resource allocation information of the downlink data channel.

Optionally, the downlink data channel is a PDSCH.

In addition, in step 1001, the communications apparatus may receive the time-frequency resource configuration information of the downlink data channel directly from the access network device, or may receive the time-frequency resource configuration information of the downlink data channel from the access network device by using another relay device or a relay device.

1002. The access network equipment sends the time-frequency resource configuration information of the downlink control channel to the communication device, and the communication device receives the time-frequency resource configuration information of the downlink control channel.

The time-frequency resource configuration information of the downlink control channel (for) indicates a second time-frequency resource, which is a time-frequency resource used for transmitting the downlink control channel.

The second time-frequency resource may generally be formed by a plurality of time-frequency resource blocks, and these resource blocks are generally distributed in different time domain ranges (here, different time domain ranges refer to time domain ranges that are completely non-overlapping), but are distributed in the same frequency domain range. For example, as shown in fig. 4, the second time-frequency resource is composed of three time-frequency resource blocks, which are located in the same frequency domain range but in different time domain ranges.

The second time-frequency resource may include a first time-frequency resource block, where the first time-frequency resource block includes a time-frequency resource of a downlink control channel for scheduling a downlink data channel, and the first time-frequency resource block overlaps with the first time-frequency resource.

The control resource set information is used for determining the size of the time domain resource and the size of the frequency domain resource of the resource block of the second time frequency resource, and the search space information is used for determining the position of the time domain resource of the resource block of the second time frequency resource. Therefore, the time domain range and the frequency domain range of each time frequency resource block in the second time frequency resource can be determined by the control resource set information and the search space information.

Optionally, the downlink control channel is a PDCCH.

For example, the second time-frequency resource in fig. 4 may be a resource corresponding to a control resource set (CORESET), where the resource corresponding to the control resource set (CORESET) includes three resource blocks, and fig. 5 illustrates a case of one time-frequency resource block in fig. 4.

For the resource block corresponding to the control resource set (CORESET) in fig. 5, the frequency domain position of the resource block may be determined according to a frequency domain parameter (frequency domain resource of a CORESET configured by controlled resource set or controlled resource set zero), and the time domain section of the resource block may be determined according to a time domain parameter (CORESET duration configured by controlled resource set or controlled resource set zero). As shown in fig. 5, the frequency domain resource of the resource block corresponding to the control resource set (CORESET) may be represented by the number of RBs, and the time domain duration of the resource block corresponding to the control resource set (CORESET) may be represented by the number of symbols.

1003. The access network equipment sends a downlink data channel to the communication device, and the communication device receives the downlink data channel.

The third time-frequency resource is part or all of the first time-frequency resource block, and the third time-frequency resource is not overlapped with the first time-frequency resource.

It should be understood that, the third time-frequency resource is a part or all of the first time-frequency resource block means that all the third time-frequency resources are located inside the first time-frequency resource block, that is, the time domain range of the third time-frequency resource is smaller than or equal to the time domain range of the first time-frequency resource block, and the frequency domain resource width of the third time-frequency resource is smaller than or equal to the frequency domain resource width of the first time-frequency resource block.

The third time-frequency resource may be a part of the first time-frequency resource block, which is located outside the first time-frequency resource.

For example, as shown in fig. 6, the third time-frequency resource is a part of the time-frequency resource block outside the first time-frequency resource (the shaded part of the resource in fig. 6 is the third time-frequency resource).

It should be understood that fig. 6 only shows a case that the frequency domain ranges of the first resource block and the first frequency domain resource are the same, and actually, the present application does not limit the relationship between the frequency domain ranges of the first resource block and the first frequency domain resource as long as there is an overlap between the first resource block and the first time frequency resource.

For the current communication device, a downlink data channel received by the communication device generally has a corresponding downlink control channel (the downlink control channel is used for scheduling the downlink data channel), the downlink control channel is generally located in a second time-frequency resource (e.g., a CORESET resource), and since the downlink control channel is generally distributed in the second time-frequency resource in a discrete manner, the second time-frequency resource is scattered by the downlink control channel, so that a time-frequency unit (e.g., a REG bundle) including the downlink control channel resource in the second time-frequency resource cannot be allocated to other communication devices, which results in resource waste.

In the application, the downlink data channel is received by using the third time-frequency resource, the first time-frequency resource block can be located outside the first time-frequency resource, and the resource which cannot be allocated to other communication devices is allocated to the current communication device to receive the downlink data channel, so that the waste of the second time-frequency resource can be reduced, and the utilization rate of the second time-frequency resource is improved.

Optionally, before the step 1003, the method shown in fig. 2 further includes:

1002b, the communication device determines the third time-frequency resource according to the first time-frequency resource and the first time-frequency resource block.

Specifically, after the communication apparatus acquires (or determines) the first time-frequency resource and the first time-frequency resource block, at least a part of the time-frequency resources in the first time-frequency resource block that do not overlap with the first time-frequency resource may be determined as the third time-frequency resource.

Optionally, before the step 1002b, the method shown in fig. 2 further includes: the communications device determines a first block of time frequency resources.

After the communication device determines the first time-frequency resource according to the time-frequency resource configuration information of the downlink data channel and determines the second time-frequency resource according to the time-frequency resource configuration information of the downlink control channel, the communication device may determine the first time-frequency resource block from the second time-frequency resource. Specifically, the second time-frequency resource generally includes a plurality of time-frequency resource blocks, and the communication device may determine, as the first time-frequency resource block, a time-frequency resource of a downlink control channel including a downlink data channel in the plurality of time-frequency resource blocks, and a resource block overlapping with the first time-frequency resource.

Optionally, the method shown in fig. 2 further includes: the access network equipment sends the downlink data channel to the communication device on the first time-frequency resource, and the communication device receives the downlink data channel on the first time-frequency resource.

It should be understood that, in this case, the method shown in fig. 2 is to transmit the downlink data channel by using the first time-frequency resource and the third time-frequency resource. Therefore, in the scheme, in addition to receiving the downlink data channel by using the third time-frequency resource, the downlink data channel can be received based on the originally allocated first time-frequency resource.

The third time frequency resource may be a part of the resource located in the first time frequency resource block and having no overlap with the first time frequency resource, and details of which resources are specifically included in the third time frequency resource are described below.

The second time-frequency resource may include at least one fourth time-frequency resource, where a time domain range of each fourth time-frequency resource is the same as a time domain range of the first time-frequency resource block, a frequency domain resource width of each fourth time-frequency resource is multiple resource blocks, and each fourth time-frequency resource includes a part of time-frequency resources of a downlink control channel for scheduling a downlink data channel.

For example, as shown in fig. 7, the first time-frequency resource block includes a fourth time-frequency resource, and the fourth time-frequency resource includes two parts of resources (a resource located in a shaded portion and a resource located outside the shaded portion), where the resource located in the shaded portion is a time-frequency resource of a downlink control channel and a demodulation reference signal. It should be understood that fig. 7 only shows that the first time-frequency resource block includes one fourth time-frequency resource, and in fact, the first time-frequency resource block may include one or more fourth time-frequency resources, and the specific number of the fourth time-frequency resources included in the first time-frequency resource block is not limited in the present application.

When the first time-frequency resource block includes at least one fourth time-frequency resource, the third time-frequency resource may include a part of the time-frequency resource of each fourth time-frequency resource in the at least one fourth time-frequency resource. Wherein the partial time frequency resource of each fourth time frequency resource is a specific time frequency resource in each fourth time frequency resource.

Specifically, there is no overlap between the partial time frequency resources of each fourth time frequency resource and the first time frequency resource, and the partial time frequency resources of each fourth time frequency resource do not include the time frequency resources of the downlink control channel that schedules the downlink data channel, nor the time frequency resources of the demodulation reference signal of the downlink control channel.

For example, as shown in fig. 8, the first time-frequency resource block includes a fourth time-frequency resource, and a part of the time-frequency resource of the fourth time-frequency resource is other resources except for the first part of the resources and the second part of the resources in the fourth time-frequency resource. The first part of resources are time-frequency resources of a downlink control channel and a demodulation reference signal, and the second part of resources are time-frequency resources which are in the first time-frequency resource block, except the first part of resources, and are located inside the first time-frequency resources.

The partial time-frequency resources of the fourth time-frequency resources may be located within the frequency domain range of the first time-frequency resources (that is, the frequency domain resources of the partial time-frequency resources of the fourth time-frequency resources are part or all of the frequency domain resources of the first time-frequency resources), or may be located outside the frequency domain range of the first time-frequency resources (that is, the frequency domain resources of the partial time-frequency resources of the fourth time-frequency resources are not part or all of the frequency domain resources of the first time-frequency resources).

When part of the time-frequency resources of the fourth time-frequency resources are located in the frequency domain range of the first time-frequency resources, because the frequency domain range of the first time-frequency resources is closer to that of the fourth time-frequency resources, the effect of channel estimation can be improved when the downlink data channel is transmitted by using the part of the time-frequency resources of the fourth time-frequency resources as the third time-frequency resources.

That is to say, when part of the time-frequency resources of the fourth time-frequency resource is located in the frequency domain range of the first time-frequency resource, the downlink data channel and the demodulation reference signal are both transmitted in the same frequency domain range, and the channel estimation according to the demodulation reference signal has a better effect.

For example, the frequency domain range of the partial time-frequency resource of the fourth time-frequency resource shown in fig. 8 is located within the frequency domain range of the first time-frequency resource, and the downlink data channel may be transmitted by using the partial time-frequency resource of the fourth time-frequency resource.

As another example, the frequency domain range of the part of the time-frequency resource of the fourth time-frequency resource shown in fig. 9 and 10 partially exceeds the frequency domain range of the first time-frequency resource, in this case, the downlink data channel can still be transmitted by using the part of the time-frequency resource of the fourth time-frequency resource shown in fig. 9 and 10.

In fact, when determining the partial time-frequency resources of the fourth time-frequency resources, the frequency domain range of the partial time-frequency resources of the fourth time-frequency resources may also be directly limited to the frequency domain range of the first time-frequency resources. That is to say, the time frequency resource of the part of the time frequency resource in the fourth time frequency resource shown in fig. 9 and fig. 10 in the frequency domain of the first time frequency resource can be used as the part of the time frequency resource in the new fourth time frequency resource, and the downlink data channel can be transmitted by using the part of the time frequency resource.

It should be understood that fig. 8, fig. 9, and fig. 10 only show that the first time-frequency resource block includes one fourth time-frequency resource, and in fact, the second time-frequency resource may include one or more fourth time-frequency resources, and the specific number of the fourth time-frequency resources included in the first time-frequency resource block is not limited in the present application.

In this application, when the first time-frequency resource and the first time-frequency resource block overlap, a third time-frequency resource, which is located outside the first time-frequency resource, in the first time-frequency resource block may be used to transmit the downlink channel.

In fact, when there is no overlap between the first time-frequency resource and the resource block in the second time-frequency resource, the resource block in the second time-frequency resource may also be utilized to transmit downlink data.

Specifically, when the second time-frequency resource includes a second time-frequency resource block, the second time-frequency resource block includes a time-frequency resource of a downlink control channel for scheduling the downlink data channel, and the second time-frequency resource block is adjacent to the second time-frequency resource or a time-domain distance from the second time-frequency resource is within a preset range, then the downlink data channel may also be transmitted by using a resource in the second time-frequency resource block.

The second time frequency resource block is a block of time frequency resource which forms the second time frequency resource, the first time frequency resource is used for transmitting the time frequency resource of the downlink data channel, and the second time frequency resource block and the first time frequency resource belong to different types of time frequency resources.

For example, as shown in fig. 11, the first time-frequency resource is adjacent to the second time-frequency resource block but does not overlap with the second time-frequency resource block, and at this time, the downlink data channel may be transmitted by directly using the resource in the second time-frequency resource block.

For another example, as shown in fig. 12, the distance between the first time-frequency resource and the second time-frequency resource block in the time domain is d, and if d is smaller than the preset time-domain distance, the downlink data channel may also be transmitted directly by using the resource in the second resource block.

Optionally, the specific measurement unit of d is an OFDM symbol.

Alternatively, d may represent absolute time, and in this case, the unit of d may be x milliseconds (ms), where x is a real number smaller than 1 and larger than 0.

That is to say, when the time domain distance between the first time-frequency resource and the second time-frequency resource block is within a certain range, the downlink data channel may be transmitted by using the resource in the second time-frequency resource block, so the distance between the first time-frequency resource and the second time-frequency resource block is limited because the demodulation reference signal of the downlink data channel is in the first time-frequency resource region, and if the downlink data channel is received on the second time-frequency resource block, the channel estimation needs to be obtained according to the demodulation reference signal of the downlink data channel. Therefore, the time domain resource where the resource for transmitting the downlink data channel is located and the time domain resource where the resource for transmitting the demodulation reference signal is located cannot be too far away, otherwise, the channel estimation is not accurate enough.

Similar to the first time-frequency resource block, the second time-frequency resource block may also include at least one fourth time-frequency resource, and at this time, each fourth time-frequency resource in the at least one fourth time-frequency resource may also be used as a third time-frequency resource to transmit the downlink data channel.

When the downlink data channel is transmitted by using the second time frequency resource block in fig. 11 and fig. 12, the downlink data channel may be specifically transmitted by using a fourth time frequency resource in at least one fourth time frequency resource in the second time frequency resource block.

As shown in fig. 13, the first time-frequency resource block and the second time-frequency resource block are adjacent, and the first time-frequency resource block includes a fourth time-frequency resource, so that a part of the time-frequency resources in the fourth time-frequency resource may be used to transmit the downlink data channel.

As shown in fig. 14, the first time-frequency resource block and the second time-frequency resource block are neither adjacent nor overlapped, and the first time-frequency resource block includes a fourth time-frequency resource, so that a part of the time-frequency resources in the fourth time-frequency resource may be used to transmit the downlink data channel.

In fig. 13 and 14, a part of the fourth time-frequency resources are resources indicated by horizontal line regions in the fourth time-frequency resources.

It should be understood that fig. 13 and fig. 14 only illustrate that the second time-frequency resource block includes one fourth time-frequency resource, and actually, the second time-frequency resource block of fig. 13 and fig. 14 may further include a plurality of fourth time-frequency resources, and all of the plurality of fourth time-frequency resources may be used for transmitting the downlink data channel.

It should be understood that, in the present application, the second time-frequency resource includes either the first time-frequency resource block or the second time-frequency resource block. When the second time-frequency resource includes the first time-frequency resource block, the downlink data channel may be transmitted by using a part of the resources in the first time-frequency resource block (see above for what resources in the first time-frequency resource block are specifically used for transmitting the downlink data channel), and when the second time-frequency resource includes the second time-frequency resource block, the downlink data channel may be transmitted by using a part of the resources in the second time-frequency resource block (specifically, the downlink data channel may be transmitted by using resources similar to the first time-frequency resource block in the second time-frequency resource block).

Optionally, the frequency domain resource width of each of the at least one fourth time frequency resource is one RBG.

Optionally, the precoding granularity corresponding to the second time-frequency resource is an REG bundle.

Assuming that the execution subject of the method is the current communication device, when the precoding granularity corresponding to the second time-frequency resource is the REG bundle, only the REG bundle including the downlink control channel includes the demodulation reference signal of the downlink data channel, and for the REG bundle including the downlink data channel and the corresponding demodulation reference signal, other idle resources except the resource corresponding to the downlink data channel and the corresponding demodulation reference signal are not allocated to other communication devices except the current communication device.

Optionally, the mapping of CCEs to REGs in the second time-frequency resource is interleaved.

Optionally, the precoding granularity corresponding to the second time-frequency resource is all consecutive RBs.

The transmission method of the downlink data channel according to the embodiment of the present application is described in detail with reference to fig. 1 to 12, and the communication apparatus according to the embodiment of the present application is described with reference to fig. 15 to 18.

Fig. 15 is a schematic block diagram of a communication apparatus according to an embodiment of the present application. The communication device 2000 shown in fig. 15 may be used to perform the various steps performed by the communication device in the method shown in fig. 2.

The communication apparatus 2000 shown in fig. 15 includes:

a receiving module 2001, configured to receive time-frequency resource configuration information of a downlink data channel from an access network device, where the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is a time-frequency resource used for transmitting the downlink data channel;

the receiving module 2001 is further configured to receive time-frequency resource configuration information of a downlink control channel from the access network device, where the time-frequency resource configuration information of the downlink control channel indicates a second time-frequency resource, the second time-frequency resource is a time-frequency resource used for transmitting the downlink control channel, the second time-frequency resource includes a first time-frequency resource block, the first time-frequency resource block includes a time-frequency resource of the downlink control channel for scheduling the downlink data channel, and the first time-frequency resource block and the first time-frequency resource are overlapped;

a determining module 2002, configured to determine the third time-frequency resource according to the first time-frequency resource and the first time-frequency resource block, where the third time-frequency resource is a part or all of the first time-frequency resource block, and there is no overlap between the third time-frequency resource and the first time-frequency resource;

the receiving module 2001 is further configured to receive the downlink data channel in the third time-frequency resource.

Optionally, as an embodiment, the third time-frequency resource includes a partial time-frequency resource of each of at least one fourth time-frequency resource;

the first time-frequency resource block comprises the at least one fourth time-frequency resource, the time domain range of each fourth time-frequency resource in the at least one fourth time-frequency resource is the same as the time domain range of the first time-frequency resource block, the frequency domain resource width of each fourth time-frequency resource in the at least one fourth time-frequency resource is a plurality of Resource Blocks (RBs), and each fourth time-frequency resource in the at least one fourth time-frequency resource comprises a part of time-frequency resources of a downlink control channel for scheduling the downlink data channel;

and the partial time frequency resources of each fourth time frequency resource do not overlap with the first time frequency resource, and the partial time frequency resources of each fourth time frequency resource do not comprise the time frequency resources of a downlink control channel for scheduling the downlink data channel and the time frequency resources of a demodulation reference signal of the downlink control channel.

Optionally, as an embodiment, a frequency domain range of the partial time-frequency resource of each fourth time-frequency resource is within a frequency domain range of the first time-frequency resource.

Optionally, as an embodiment, a frequency domain resource width of each fourth time frequency resource in the at least one fourth time frequency resource is one resource block group RBG, or a frequency domain resource width of each fourth time frequency resource in the at least one fourth time frequency resource is a part of one RBG, or a frequency domain resource width of a part of the fourth time frequency resource in the at least one fourth time frequency resource is one RBG, and a frequency domain resource width of a part of the fourth time frequency resource is a part of one RBG.

Optionally, as an embodiment, the precoding granularity corresponding to the second time-frequency resource is a resource element group REG bundle.

Optionally, as an embodiment, the mapping of control channel elements CCE to REG in the second time-frequency resource is interleaved.

Fig. 16 is a schematic block diagram of a communication apparatus according to an embodiment of the present application. The communications apparatus 3000 shown in fig. 16 may be used to perform various steps performed by the access network device in the method shown in fig. 2.

The communication device 3000 shown in fig. 16 includes:

a sending module 3001, configured to send, to a terminal device, time-frequency resource configuration information of a downlink data channel, where the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is a time-frequency resource used for transmitting the downlink data channel;

the sending module 3001 is further configured to send, to the terminal device, time-frequency resource configuration information of a downlink control channel, where the time-frequency resource configuration information of the downlink control channel indicates a second time-frequency resource, the second time-frequency resource includes a first time-frequency resource block, the first time-frequency resource block includes a time-frequency resource of a downlink control channel that schedules the downlink data channel, and the first time-frequency resource block overlap;

a determining module 3002, configured to determine the third time-frequency resource according to the first time-frequency resource and the first time-frequency resource block, where the third time-frequency resource is a part or all of the first time-frequency resource block, and there is no overlap between the third time-frequency resource and the first time-frequency resource;

the sending module 3002 is further configured to send the downlink data channel to the terminal device at the third time-frequency resource, where the third time-frequency resource is part or all of the first time-frequency resource block, and the third time-frequency resource does not overlap with the first time-frequency resource.

Fig. 17 is a schematic block diagram of a communication apparatus according to an embodiment of the present application. The communications apparatus 4000 shown in fig. 17 may be used to perform the various steps performed by the communications apparatus in the method shown in fig. 2.

The communication device 4000 shown in fig. 17 includes:

a transceiver 4001, said transceiver 4001 being operable to perform receiving or transmitting steps of the communication apparatus of fig. 2, in particular to:

receiving time-frequency resource configuration information of a downlink data channel from access network equipment, wherein the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is used for transmitting the time-frequency resource of the downlink data channel;

receiving time-frequency resource configuration information of a downlink control channel from the access network device, where the time-frequency resource configuration information of the downlink control channel indicates a second time-frequency resource, the second time-frequency resource is a time-frequency resource used for transmitting the downlink control channel, the second time-frequency resource includes a first time-frequency resource block, the first time-frequency resource block includes a time-frequency resource of the downlink control channel for scheduling the downlink data channel, and the first time-frequency resource block overlaps with the first time-frequency resource;

a memory 4002 for storing programs;

a processor 4003 configured to execute the program stored in the memory 4002, wherein when the program stored in the memory 4002 is executed, the processor 4003 is configured to perform the determining and other processing steps of the communication apparatus shown in fig. 2, and specifically, to determine the third time-frequency resource according to the first time-frequency resource and the first time-frequency resource block, where the third time-frequency resource is a part or all of the first time-frequency resource block, and the third time-frequency resource does not overlap with the first time-frequency resource; receiving time-frequency resource configuration information of a downlink data channel from access network equipment, wherein the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is used for transmitting the time-frequency resource of the downlink data channel;

the transceiver 4001 is further configured to receive the downlink data channel in the third time-frequency resource.

Fig. 18 is a schematic block diagram of a communication apparatus according to an embodiment of the present application. The communications apparatus 5000 shown in fig. 18 may be used to perform various steps performed by the access network device in the method shown in fig. 2.

A transceiver 5001, where the transceiver 5001 may be configured to perform the receiving or sending steps of the access network device shown in fig. 2, specifically to:

sending time-frequency resource configuration information of a downlink data channel to a terminal device, wherein the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is used for transmitting the time-frequency resource of the downlink data channel;

sending time-frequency resource configuration information of a downlink control channel to the terminal equipment, wherein the time-frequency resource configuration information of the downlink control channel indicates a second time-frequency resource, the second time-frequency resource comprises a first time-frequency resource block, the first time-frequency resource block comprises a time-frequency resource of a downlink control channel for scheduling the downlink data channel, and the first time-frequency resource block and the first time-frequency resource are overlapped;

a memory 5002 for storing programs;

a processor 5003 configured to execute the program stored in the memory 5002, wherein when the program stored in the memory 5002 is executed, the processor 5003 is configured to perform the processing steps of determining the access network device shown in fig. 2, and in particular, is configured to determine the third time-frequency resource according to the first time-frequency resource and the first time-frequency resource block, where the third time-frequency resource is a part or all of the first time-frequency resource block, and there is no overlap between the third time-frequency resource and the first time-frequency resource;

the transceiver 5001 is further configured to send the downlink data channel to the terminal device in the third time-frequency resource, where the third time-frequency resource is a part or all of the first time-frequency resource block, and there is no overlap between the third time-frequency resource and the first time-frequency resource.

The communication device in fig. 15 and 17 may be a terminal device, or may be a chip or a functional module applied to a terminal device.

The communication device in fig. 16 and 18 may be an access network device, or may be a chip or a functional module applied to the access network device.

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the text of the present application, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship; in the formula of the present application, the character "/" indicates that the preceding and following associated objects are in a "division" relationship.

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic.

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

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

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

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

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

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

Claims

1. A method for receiving a downlink data channel, comprising:

receiving the downlink data channel in a third time-frequency resource, wherein the third time-frequency resource is part of the first time-frequency resource block, and the third time-frequency resource does not overlap with the first time-frequency resource.

2. The method of claim 1, wherein the third time-frequency resource comprises a portion of time-frequency resources of each of at least one fourth time-frequency resource;

3. The method of claim 2, wherein a frequency domain range of the partial time-frequency resources of each fourth time-frequency resource is within a frequency domain range of the first time-frequency resource.

4. The method according to claim 2 or 3, wherein the frequency domain resource width of each of the at least one fourth time frequency resource is one Resource Block Group (RBG), or the frequency domain resource width of each of the at least one fourth time frequency resource is a portion of one RBG, or the frequency domain resource width of a part of the fourth time frequency resource is one RBG and the frequency domain resource width of a part of the fourth time frequency resource is a portion of one RBG.

5. The method of claim 1, wherein the precoding granularity corresponding to the second time-frequency resource is a Resource Element Group (REG) bundle.

6. The method of claim 1, wherein the mapping of Control Channel Elements (CCEs) to REGs in the second time-frequency resource is interleaved.

7. A method for transmitting a downlink data channel, comprising:

sending time-frequency resource configuration information of a downlink data channel to terminal equipment, wherein the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is used for transmitting the time-frequency resource of the downlink data channel;

and sending the downlink data channel to the terminal equipment at a third time-frequency resource, wherein the third time-frequency resource is part of the first time-frequency resource block, and the third time-frequency resource is not overlapped with the first time-frequency resource.

8. The method of claim 7, wherein the third time-frequency resource comprises a portion of the time-frequency resource of each of at least one fourth time-frequency resource;

9. The method of claim 8, wherein a frequency domain range of the partial time-frequency resources of each fourth time-frequency resource is within a frequency domain range of the first time-frequency resource.

10. The method according to claim 8 or 9, wherein the frequency domain resource width of each of the at least one fourth time frequency resource is one resource block group RBG, or the frequency domain resource width of each of the at least one fourth time frequency resource is a portion of one RBG, or the frequency domain resource width of a part of the fourth time frequency resource is one RBG and the frequency domain resource width of a part of the fourth time frequency resource is a portion of one RBG.

11. The method of claim 7, wherein the precoding granularity corresponding to the second time-frequency resource is a Resource Element Group (REG) bundle.

12. The method of claim 7, wherein the mapping of Control Channel Elements (CCEs) to REGs in the second time-frequency resource is interleaved.

13. A communications apparatus, comprising:

a receiving module, configured to receive time-frequency resource configuration information of a downlink data channel from an access network device, where the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is a time-frequency resource used for transmitting the downlink data channel;

the receiving module is further configured to receive time-frequency resource configuration information of a downlink control channel from the access network device, where the time-frequency resource configuration information of the downlink control channel indicates a second time-frequency resource, the second time-frequency resource is a time-frequency resource used for transmitting the downlink control channel, the second time-frequency resource includes a first time-frequency resource block, the first time-frequency resource block includes a time-frequency resource of the downlink control channel that schedules the downlink data channel, and the first time-frequency resource block overlaps with the first time-frequency resource;

a determining module, configured to determine a third time-frequency resource according to the first time-frequency resource and the first time-frequency resource block, where the third time-frequency resource is part of the first time-frequency resource block, and there is no overlap between the third time-frequency resource and the first time-frequency resource;

the receiving module is further configured to receive the downlink data channel in the third time-frequency resource.

14. The communications apparatus of claim 13, wherein the third time-frequency resource comprises a portion of time-frequency resources of each of at least one fourth time-frequency resource;

15. The communications apparatus of claim 14, wherein the frequency domain range of the partial time-frequency resources of each fourth time-frequency resource is within the frequency domain range of the first time-frequency resource.

16. The communication apparatus according to claim 14 or 15, wherein the frequency domain resource width of each of the at least one fourth time frequency resource is one resource block group RBG, or the frequency domain resource width of each of the at least one fourth time frequency resource is a portion of one RBG, or the frequency domain resource width of a portion of the at least one fourth time frequency resource is one RBG and the frequency domain resource width of a portion of the fourth time frequency resource is a portion of one RBG.

17. The communications apparatus of claim 13, wherein the precoding granularity corresponding to the second time-frequency resource is a Resource Element Group (REG) bundle.

18. The communications apparatus of claim 13, wherein the mapping of Control Channel Elements (CCEs) to REGs in the second time-frequency resource is interleaved.

19. A communications apparatus, comprising:

a sending module, configured to send time-frequency resource configuration information of a downlink data channel to a terminal device, where the time-frequency resource configuration information of the downlink data channel indicates a first time-frequency resource, and the first time-frequency resource is a time-frequency resource used for transmitting the downlink data channel;

the sending module is further configured to send, to the terminal device, time-frequency resource configuration information of a downlink control channel, where the time-frequency resource configuration information of the downlink control channel indicates a second time-frequency resource, the second time-frequency resource includes a first time-frequency resource block, the first time-frequency resource block includes a time-frequency resource of a downlink control channel that schedules the downlink data channel, and the first time-frequency resource block overlaps with the first time-frequency resource;

a determining module, configured to determine a third time-frequency resource according to the first time-frequency resource and the first time-frequency resource block, where the third time-frequency resource is a part or all of the first time-frequency resource block, and there is no overlap between the third time-frequency resource and the first time-frequency resource;

the sending module is further configured to send the downlink data channel to the terminal device at the third time-frequency resource, where the third time-frequency resource is part of the first time-frequency resource block, and the third time-frequency resource does not overlap with the first time-frequency resource.

20. The communications apparatus of claim 19, wherein the third time-frequency resource comprises a portion of time-frequency resources of each of at least one fourth time-frequency resource;

21. The communications apparatus of claim 20, wherein the frequency domain range of the partial time-frequency resources of each fourth time-frequency resource is within the frequency domain range of the first time-frequency resource.

22. The communications apparatus as claimed in claim 20 or 21, wherein the frequency domain resource width of each of the at least one fourth time frequency resource is one resource block group RBG, or the frequency domain resource width of each of the at least one fourth time frequency resource is a portion of one RBG, or the frequency domain resource width of a portion of the at least one fourth time frequency resource is one RBG and the frequency domain resource width of a portion of the fourth time frequency resource is a portion of one RBG.

23. The communications apparatus of claim 19, wherein the precoding granularity corresponding to the second time-frequency resource is a Resource Element Group (REG) bundle.

24. The communications apparatus of claim 19, wherein the mapping of Control Channel Elements (CCEs) to REGs in the second time-frequency resource is interleaved.

25. A computer-readable storage medium, characterized in that the computer-readable storage medium stores program code that is executed to implement part or all of the steps of the method according to any one of claims 1-6 or claims 7-12.