WO2019157920A1 - Method for transmitting feedback information and communication device - Google Patents

Abstract

The present application provides a method for transmitting feedback information and a communication device. The method comprises: a terminal device receives at least one piece of downlink information from a time unit set; the terminal device determines a second time unit for bearing feedback information corresponding to the downlink information, the time unit set having a first association relationship to the second time unit; the terminal device determines a first codebook, wherein when first downlink information in a time unit subset satisfies a preset condition, the first codebook comprises feedback information corresponding to the first downlink information but does not comprise feedback information corresponding to a particular time unit in the time unit subset, the preset condition comprises a first condition that is the number of the first downlink information satisfies a first preset value, and the time unit subset has a second association relationship to the second time unit; and the terminal device sends the first codebook in the second time unit. The technical solutions of embodiments of the present application can improve the resource utilization efficiency of an uplink control channel for bearing the feedback information

Description

Method and communication device for transmitting feedback information

This application is required to be submitted to the Chinese Patent Office on February 13, 2018, the application number is 201810150623.5, the application name is "Method and Communication Equipment for Transmission of Feedback Information", and the Chinese Patent Office is submitted to the Chinese Patent Office on April 4, 2018, and the application number is 2011018302168.6. The priority of the Chinese Patent Application entitled "Method and Communication Device for Transmission of Feedback Information" is incorporated herein by reference.

Technical field

The present application relates to the field of communications and, more particularly, to a method and communication device for transmitting feedback information.

Background technique

A semi-static codebook configuration is supported in a Long Term Evolution (LTE) system, that is, a codebook is determined based on the number of downlink subframes in a semi-static downlink subframe set. For example, the codebook of the Acknowledge (ACK) information/Negative-acknowledge (NACK) information is composed of feedback information corresponding to all downlink subframes in the semi-static downlink subframe set. The downlink subframe that includes the physical downlink shared channel (PDSCH) that is actually scheduled or the semi-persistent scheduling (SPS) release indication, and the downlink subframe that is not scheduled. . The downlink subframe in which the unscheduled downlink subframe or the terminal device does not receive the scheduling signaling is processed by the padding NACK in the codebook.

In the existing LTE system, for the semi-static codebook configuration, the back-off scheduling and the back-off codebook are supported. The future 5th Generation (5G) system is different from the LTE system. Therefore, how to implement the back-off codebook and the back-off scheduling mechanism in the 5G system and improve the resource utilization efficiency of the uplink control channel carrying the feedback information become a technical problem to be solved in the 5G system.

Summary of the invention

The present application provides a method and a communication device for transmitting feedback information, which can improve resource utilization efficiency of an uplink control channel carrying feedback information.

A first aspect provides a method for transmitting feedback information, including: a terminal device receiving at least one downlink information in at least one first time unit of a time unit set, the time unit set being at least configured by the terminal device a collection of at least one first time unit on a frequency domain unit;

Determining, by the terminal device, a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship;

Determining, by the terminal device, a first codebook, where the first codebook includes feedback information corresponding to the first downlink information, where the first downlink information in the time unit subset meets a preset condition, The first codebook does not include feedback information corresponding to a specific time unit in the subset of time units, where the specific time unit is at least the first time unit of the time unit set except the first downlink information. a first time unit, the preset condition includes a first condition, where the first condition is that the number of the first downlink information meets a first preset value, and the time unit subset is the time unit set a subset of the time unit and the second time unit have a second association relationship;

The terminal device sends uplink control information in the second time unit, where the uplink control information carries the first codebook.

In the technical solution of the embodiment of the present application, when the terminal device schedules multiple downlink information in multiple time units in the time unit set corresponding to the first association relationship, the downlink information corresponding to the second association relationship When the number of the first condition is met, the codebook can be retired, thereby improving the resource utilization efficiency of the uplink control channel carrying the feedback information.

With reference to the first aspect, in some implementations of the first aspect, the preset condition further includes a second condition, where the second condition is that the indication information in the downlink control channel of the first downlink information is dynamically scheduled. The value is the second preset value.

Optionally, the second preset value may be a value of a Downlink Assignment Indicator (DAI).

With reference to the first aspect, in some implementations of the first aspect, the preset condition further includes a third condition, where the first condition that the first downlink information is located is the time The first time unit of a particular time domain location in a collection of cells.

With reference to the first aspect, in some implementations of the first aspect, the preset condition further includes a fourth condition, where the fourth condition is that the first downlink information is carried in the at least one frequency domain unit The primary frequency domain unit or the primary secondary frequency domain unit.

In conjunction with the first aspect, in some implementations of the first aspect, the preset condition includes a first condition, and may further include any one or more of the second condition, the third condition, and the fourth condition. For example, the preset condition includes a second condition and a third condition in addition to the first condition. The preset condition includes a second condition and a fourth condition in addition to the first condition. This application does not limit this.

With reference to the first aspect, in some implementations of the first aspect, when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes The feedback information corresponding to all the first time units in the set of time units.

In conjunction with the first aspect, in some implementations of the first aspect, the value of the indication information is set according to a preset rule associated with the subset of time units.

With reference to the first aspect, in some implementations of the first aspect, the preset is in at least one first time unit on each of the at least one frequency domain unit in the subset of time units The rule counts up and down the order of time units; or

For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.

In the technical solution of the embodiment of the present application, the problem of inconsistent understanding between the terminal device and the network device caused by the codebook fallback is solved by performing DAI independent cumulative counting in the time subset.

With reference to the first aspect, in some implementations of the first aspect, the at least one downlink information further includes second downlink information, where the downlink control channel that schedules the second downlink information is a semi-persistently scheduled downlink control channel, The first codebook further includes feedback information corresponding to the second downlink information.

With reference to the first aspect, in some implementations of the first aspect, the first association relationship is predefined according to a standard and/or the network device is configured by using Radio Resource Control (RRC) signaling. Terminal equipment.

In conjunction with the first aspect, in some implementations of the first aspect, the second association relationship is determined according to a downlink control channel that dynamically schedules the first downlink information.

In conjunction with the first aspect, in some implementations of the first aspect, before the determining, by the terminal device, the first codebook, the method further includes:

The terminal device determines a semi-static codebook mode from a plurality of candidate codebook modes, where the plurality of candidate codebook modes include a semi-static codebook mode and a dynamic codebook mode.

With reference to the first aspect, in some implementations of the first aspect, the first preset value is greater than or equal to 1, wherein, when the first preset value is greater than 1, the first preset value is The first downlink information carries the same transport block information.

In conjunction with the first aspect, in some implementations of the first aspect, the first preset value of the first downlink information is scheduled by the same downlink control channel.

With reference to the first aspect, in some implementation manners of the first aspect, the first preset value is less than or equal to a third preset value, where the third preset value is determined according to a downlink set parameter configured by the high layer signaling of.

A second aspect provides a method for transmitting feedback information, including: the network device transmitting, to the terminal device, at least one downlink information in at least one first time unit of the set of time units, where the set of time units is a set of at least one first time unit on at least one of the configured frequency domain units;

Determining, by the network device, a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship;

The network device receives the uplink control information sent by the terminal device in the second time unit, where the uplink control information carries a first codebook, where the first codebook is the first time in the time unit subset The first codebook includes the feedback information corresponding to the first downlink information, where the first codebook does not include the specific time unit corresponding to the time unit subset. And the specific time unit is at least one first time unit of the time unit set except the first time unit where the first downlink information is located, where the preset condition includes a first condition, The first condition is that the number of the first downlink information meets a first preset value, the subset of time units is a subset of the set of time units, the subset of time units and the second time The unit has a second association.

In the technical solution of the embodiment of the present application, the network device receives the first codebook sent by the terminal device, and when the first downlink information meets the preset condition in the time unit subset, the first codebook performs codebook rollback, thereby improving The resource utilization efficiency of the system for the uplink control channel carrying the feedback information.

With reference to the second aspect, in some implementation manners of the second aspect, the preset condition further includes a second condition, where the second condition is that the indication information in the downlink control channel of the first downlink information is dynamically scheduled. The value is the second preset value.

With reference to the second aspect, in some implementations of the second aspect, the preset condition further includes a third condition, where the first time unit in which the first downlink information is located is the time The first time unit of a particular time domain location in a collection of cells.

With reference to the second aspect, in some implementations of the second aspect, the preset condition further includes a fourth condition, where the first condition is that the first downlink information is carried in the at least one frequency domain unit The primary frequency domain unit or the primary secondary frequency domain unit.

In conjunction with the second aspect, in some implementations of the second aspect, the preset condition includes a first condition, and may further include any one or more of the second condition, the third condition, and the fourth condition. For example, the preset condition includes a second condition and a third condition in addition to the first condition. The preset condition includes a second condition and a fourth condition in addition to the first condition. This application does not limit this.

With reference to the second aspect, in some implementations of the second aspect, when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes The feedback information corresponding to all the first time units in the set of time units.

In conjunction with the second aspect, in some implementations of the second aspect, the value of the indication information is set according to a preset rule associated with the subset of time units.

With reference to the second aspect, in some implementations of the second aspect, the preset is in at least one first time unit on each of the at least one frequency domain unit in the subset of time units The rule counts up and down the order of time units; or

For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.

In the technical solution of the embodiment of the present application, the problem of inconsistent understanding between the terminal device and the network device caused by the codebook fallback is solved by performing DAI independent cumulative counting in the time subset.

With reference to the second aspect, in some implementations of the second aspect, the at least one downlink information further includes second downlink information, where the downlink control channel that schedules the second downlink information is a semi-persistently scheduled downlink control channel, The first codebook further includes feedback information corresponding to the second downlink information.

With reference to the second aspect, in some implementations of the second aspect, the first association relationship is configured according to a standard and/or the network device is configured to the terminal device by using a radio resource control RRC signaling configuration.

In conjunction with the second aspect, in some implementations of the second aspect, the second association relationship is indicated by a downlink control channel that dynamically schedules the first downlink information.

With reference to the second aspect, in some implementations of the second aspect, before the receiving, by the network device, the uplink control information sent by the terminal device in the second time unit, the method further includes:

Determining, by the network device, a semi-static codebook mode from a plurality of candidate codebook modes, where the plurality of candidate codebook modes include a semi-static codebook mode and a dynamic codebook mode;

The network device configures the semi-static codebook mode to the terminal device by signaling.

With reference to the second aspect, in some implementations of the second aspect, the first preset value is greater than or equal to 1, wherein, when the first preset value is greater than 1, the first preset value is The first downlink information carries the same transport block information.

With reference to the second aspect, in some implementation manners of the second aspect, the first preset value of the first downlink information is scheduled by the same downlink control channel.

In combination with the second aspect, in some implementation manners of the second aspect, the first preset value is less than or equal to a third preset value, where the third preset value is determined according to a downlink set parameter configured by the high layer signaling of.

With reference to the first aspect and the second aspect, in some possible implementations, the at least one downlink information is dynamically scheduled downlink information, and specifically, may include a downlink semi-persistent scheduling SPS release indication or a dynamically scheduled downlink data channel. . The dynamically scheduled downlink data channel is scheduled by the dynamic downlink control channel, and the dynamic means that each downlink data channel transmission requires a corresponding downlink control channel for scheduling.

The semi-persistently scheduled downlink data channel is scheduled by the semi-persistent downlink control channel. After the semi-persistent downlink control channel sends the control information once, the corresponding semi-persistent downlink data channel can be sent according to the pre-configured transmission period without The semi-continuous downlink control channel needs to be sent each time. The semi-persistent downlink scheduling may be released by using a specific downlink control channel, and the downlink control channel used to implement the release indication of the downlink semi-persistent scheduling is generally not used for scheduling the downlink data channel, but the terminal device also needs to feed back an ACK/NACK. Feedback.

With reference to the first aspect or the second aspect, in some possible implementations, the time unit may be at least one of a time slot, a mini slot, and a subframe.

In combination with the first aspect or the second aspect, in some possible implementations, the frequency domain unit may be a carrier or a carrier bandwidth segment (BWP).

With reference to the first aspect or the second aspect, in some possible implementations, the first time unit is a downlink time unit or a flexible time unit.

With reference to the first aspect or the second aspect, in some possible implementations, the second time unit is an uplink time unit or a flexible time unit.

With reference to the first aspect or the second aspect, in some possible implementations, the downlink control channel for the fallback scheduling has at least one of the following features:

For data scheduling before RRC establishment, all the values of all the fields in the control channel cannot be configured through RRC proprietary signaling. For example, a time domain resource allocation field, a Downlink Assignment Indicator (DAI) field, a BWP indication field, and the like.

With reference to the first aspect or the second aspect, in some possible implementations, the terminal device may be configured for downlink control channel detection of non-backoff scheduling, the control channel having at least one of the following features:

For data scheduling after RRC establishment, the value of at least one field in the control channel may be all configured through RRC dedicated signaling, for example, a time domain resource allocation field, a Downlink Assignment indicator (DAI) field. , BWP indicates fields, etc.

With reference to the first aspect or the second aspect, in some possible implementations, the first indication information included in the downlink control channel that dynamically schedules the first specific downlink information is a DAI field, and the preset value is preferably The state of the DAI=1 or DAI field is the value represented by '00'.

With reference to the first aspect or the second aspect, in some possible implementation manners, in the dynamic codebook mode, the terminal device determines a second codebook of the feedback information, where the second codebook includes a time unit set The feedback information corresponding to the first time unit that is actually scheduled.

With reference to the first aspect or the second aspect, in some possible implementation manners, before the terminal device sends the feedback information in the second time unit according to the first codebook, the terminal device determines an uplink. a target resource set of the control channel, the target resource of the uplink control channel is determined in the target resource set; the terminal device sends uplink control information on the target resource in the second time unit, where the uplink control information bearer The first codebook.

With reference to the first aspect or the second aspect, in some possible implementations, for example, the number of the first downlink information in the at least one downlink information is a first preset value (for example, the first preset value is In the case of 1) or when the other conditions are met, that is, the first codebook is the back-off codebook, the target resource set is the first resource set, and the first resource set corresponds to the first codebook. The codebook size is less than or equal to 2.

With reference to the first aspect or the second aspect, in some possible implementations, in a case where the number of the first downlink information in the at least one downlink information is not the first preset value, the target resource set is The second resource set, where the second resource set corresponds to the codebook size of the first codebook is greater than 2, that is, the non-return codebook or the normal semi-static codebook. At this time, the terminal device sends the first codebook of the feedback information through the second target resource in the second resource set.

A third aspect provides a communication device for transmitting feedback information, including: a transceiver unit, configured to receive at least one downlink information in at least one first time unit of a set of time units, where the set of time units is configured for a terminal device a collection of at least one first time unit on at least one frequency domain unit;

a processing unit, configured to determine a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship And determining, by the first codebook, the first codebook includes feedback information corresponding to the first downlink information, where the first downlink information in the subset of the time unit meets a preset condition, where One codebook does not include feedback information corresponding to a specific time unit in the subset of time units, and the specific time unit is at least one of the time unit set except the first time unit in which the first downlink information is located. a first time unit, the preset condition includes a first condition, where the first condition is that the number of the first downlink information meets a first preset value, and the subset of time units is a set of the time unit a subset, the time unit subset and the second time unit have a second association relationship;

The transceiver unit is configured to send uplink control information in the second time unit, where the uplink control information carries the first codebook.

In the technical solution of the embodiment of the present application, in the semi-static codebook mode, the communication device that transmits the feedback information is configured to transmit at least one time unit of the feedback information, specifically, the time unit set corresponding to the first association relationship. When a plurality of downlink information is scheduled in the time unit, when the number of downlink information corresponding to the second association relationship satisfies the first condition, the codebook can be rolled back, thereby improving the system for carrying the feedback information. Resource utilization efficiency of the uplink control channel.

With reference to the third aspect, in some implementation manners of the third aspect, the preset condition further includes a second condition, where the second condition is that the indication information in the downlink control channel of the first downlink information is dynamically scheduled. The value is the second preset value.

With reference to the third aspect, in some implementations of the third aspect, the preset condition further includes a third condition, where the first condition that the first downlink information is located is the time The first time unit of a particular time domain location in a collection of cells.

With reference to the third aspect, in some implementations of the third aspect, the preset condition further includes a fourth condition, where the fourth condition is that the first downlink information is carried in the at least one frequency domain unit The primary frequency domain unit or the primary secondary frequency domain unit.

With reference to the third aspect, in some implementations of the third aspect, when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes The feedback information corresponding to all the first time units in the set of time units.

In conjunction with the third aspect, in some implementations of the third aspect, the value of the indication information is set according to a preset rule associated with the subset of time units.

With reference to the third aspect, in some implementations of the third aspect, the preset is in at least one first time unit on each of the at least one frequency domain unit in the subset of time units The rule counts up and down the order of time units; or

For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.

In the technical solution of the embodiment of the present application, the problem of inconsistent understanding between the terminal device and the network device caused by the codebook fallback is solved by performing DAI independent cumulative counting in the time subset.

With reference to the third aspect, in some implementations of the third aspect, the at least one downlink information further includes second downlink information, where the downlink control channel that schedules the second downlink information is a semi-persistently scheduled downlink control channel, The first codebook further includes feedback information corresponding to the second downlink information.

With reference to the third aspect, in some implementations of the third aspect, the first association relationship is configured according to a standard and/or the network device is configured to the terminal device by using radio resource control RRC signaling.

In conjunction with the third aspect, in some implementations of the third aspect, the second association relationship is determined according to the dynamically scheduled downlink control channel.

With reference to the third aspect, in some implementations of the third aspect, the processing unit is further configured to: determine a semi-static codebook mode from the plurality of candidate codebook modes, where the multiple candidate codebook modes include semi-static Codebook mode and dynamic codebook mode.

With reference to the third aspect, in some implementation manners of the third aspect, the first preset value is greater than or equal to 1, wherein, when the first preset value is greater than 1, the first preset value is The first downlink information carries the same transport block information.

With reference to the third aspect, in some implementation manners of the third aspect, the first preset value first downlink information is scheduled by the same downlink control channel.

With reference to the third aspect, in some implementation manners of the third aspect, the first preset value is less than or equal to a third preset value, where the third preset value is determined according to a downlink set parameter configured by the high layer signaling of.

A fourth aspect provides a communication device for transmitting feedback information, including: a transceiver unit, configured to send at least one downlink information to a terminal device in at least one first time unit of a set of time units, where the time unit set is Determining, by the terminal device, a set of at least one first time unit on at least one frequency domain unit;

a processing unit, configured to determine a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship ;

The transceiver unit receives the uplink control information sent by the terminal device in the second time unit, where the uplink control information carries the first codebook, where the first codebook is the first downlink in the time unit subset The first codebook includes the feedback information corresponding to the first downlink information, where the first codebook does not include the corresponding time unit of the time unit subset. The feedback information, the specific time unit is at least one first time unit of the time unit set except the first time unit where the first downlink information is located, and the preset condition includes a first condition, where The first condition is that the number of the first downlink information satisfies a first preset value, the subset of time units is a subset of the set of time units, the subset of time units and the second time unit There is a second association.

In the technical solution of the embodiment of the present application, the network device receives the first codebook sent by the terminal device, and when the first downlink information meets the preset condition in the time unit subset, the first codebook performs codebook rollback, thereby improving The resource utilization efficiency of the system for the uplink control channel carrying the feedback information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the preset condition further includes a second condition, where the second condition is that the indication information in the downlink control channel of the first downlink information is dynamically scheduled. The value is the second preset value.

With reference to the fourth aspect, in some implementations of the fourth aspect, the preset condition further includes a third condition, where the first condition that the first downlink information is located is the time The first time unit of a particular time domain location in a collection of cells.

With reference to the fourth aspect, in some implementations of the fourth aspect, the preset condition further includes a fourth condition, where the fourth condition is that the first downlink information is carried in the at least one frequency domain unit The primary frequency domain unit or the primary secondary frequency domain unit.

With reference to the fourth aspect, in some implementations of the fourth aspect, when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes The feedback information corresponding to all the first time units in the set of time units.

In conjunction with the fourth aspect, in some implementations of the fourth aspect, the value of the indication information is set according to a preset rule associated with the subset of time units.

With reference to the fourth aspect, in some implementations of the fourth aspect, the preset is in at least one first time unit on each of the at least one frequency domain unit in the subset of time units The rule counts up and down the order of time units; or

For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.

In the technical solution of the embodiment of the present application, the problem of inconsistent understanding between the terminal device and the network device caused by the codebook fallback is solved by performing DAI independent cumulative counting in the time subset.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the at least one downlink information further includes second downlink information, where the downlink control channel that schedules the second downlink information is a semi-persistently scheduled downlink control channel, The first codebook further includes feedback information corresponding to the second downlink information.

In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first association relationship is configured according to a standard and/or the network device is configured to the terminal device by using radio resource control RRC signaling.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the second association relationship is indicated by a downlink control channel that dynamically schedules the first downlink information.

In conjunction with the fourth aspect, in some implementations of the fourth aspect, the processing unit is further configured to:

Determining a semi-static codebook mode from a plurality of candidate codebook modes, the plurality of candidate codebook modes including a semi-static codebook mode and a dynamic codebook mode;

The transceiver unit is further configured to configure the semi-static codebook mode to the terminal device by using signaling.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first preset value is greater than or equal to 1, wherein, when the first preset value is greater than 1, the first preset value is The first downlink information carries the same transport block information.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first preset value first downlink information is scheduled by the same downlink control channel.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first preset value is less than or equal to a third preset value, where the third preset value is determined according to a downlink set parameter configured by the high layer signaling of.

A fifth aspect provides a communication device for transmitting feedback information, comprising a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the communication device performs the first Aspect or aspect of any of the second aspects and embodiments thereof.

In a sixth aspect, a communication system is provided, the system comprising the communication device of any one of the third aspect or the third aspect, and the possible implementation of any of the fourth or fourth aspect Communication equipment.

In a seventh aspect, a chip system is provided, comprising a memory and a processor for storing a computer program, the processor for calling and running the computer program from the memory, such that the communication device on which the chip system is installed performs the above The method of any of the first aspect or the second aspect and the embodiment thereof.

In an eighth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is processed by a communication unit, a processing unit or a transceiver of a communication device (eg, a terminal device or a network device) When the device is in operation, the communication device is caused to perform the method of any of the first or second aspects described above and embodiments thereof.

A ninth aspect, a computer readable storage medium storing a program causing a communication device (eg, a terminal device or a network device) to perform any of the above first aspect or second aspect On the one hand and the method in its embodiment.

DRAWINGS

FIG. 1 is a schematic diagram of a communication system in accordance with an embodiment of the present application.

2 is a schematic diagram of an LTE system association relationship based on a semi-static codebook (taking a single TDD carrier as an example) according to an embodiment of the present application.

3 is a schematic diagram of a 5G system association relationship (taking a single TDD carrier as an example) according to an embodiment of the present application.

4 is an interactive flowchart of a terminal device transmitting feedback information according to an embodiment of the present application.

FIG. 5 is a schematic diagram of scheduling multiple PDSCHs by one DCI according to an embodiment of the present application.

FIG. 6 is a schematic diagram of a feedback information fallback mode according to an embodiment of the present application.

FIG. 7 is a schematic diagram of a feedback information fallback mode according to an embodiment of the present application.

FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application.

FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.

FIG. 10 is a schematic structural diagram of a communication device according to another embodiment of the present application.

11 is a schematic structural diagram of a communication device according to another embodiment of the present application.

Detailed ways

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

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division multiple access. (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WIMAX) communication system, and the future fifth generation (5th Generation, 5G) system or new radio (New Radio, NR) and so on.

The terminal device in the embodiment of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or User communication device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), with wireless communication. Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, terminal devices in future 5G networks, or terminal devices in the future evolution of the Public Land Mobile Network (PLMN), This embodiment of the present application is not limited thereto.

In the embodiment of the present application, the terminal device may also be a wearable device. A wearable device, which can also be called a wearable smart device, is a general term for applying wearable technology to intelligently design and wear wearable devices such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are more than just a hardware device, but they also implement powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-size, non-reliable smartphones for full or partial functions, such as smart watches or smart glasses, and focus on only one type of application, and need to work with other devices such as smartphones. Use, such as various smart bracelets for smart signs monitoring, smart jewelry, etc.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system, and the IoT is an important component of future information technology development, and its main technical feature is to pass the article through the communication technology. Connected to the network to realize an intelligent network of human-machine interconnection and physical interconnection.

In the embodiment of the present application, the IoT technology can achieve massive connection, deep coverage, and terminal power saving through, for example, Narrow Band NB technology. For example, the NB includes only one resource block (Resource Bloc, RB), that is, the bandwidth of the NB is only 180 KB. In order to achieve massive access, the terminal must be required to be discrete in access. According to the communication method of the embodiment of the present application, the congestion problem of the IoT technology massive terminal when accessing the network through the NB can be effectively solved.

In this embodiment of the present application, the network device may include an access network device or a core network device.

The access network device may be a device for communicating with the mobile device, such as an access network device, and the access network device may be an access point (AP) in the WLAN, a base station in the GSM or CDMA (Base Transceiver Station, BTS), which may also be a base station (NodeB, NB) in WCDMA, or a gNB in a new radio system (NR) system, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE. , or a relay station or an access point, or an in-vehicle device, a wearable device, and an access network device in a future 5G network or an access network device in a future evolved PLMN network.

In addition, in the embodiment of the present application, the access network device provides a service for the cell, and the terminal device communicates with the access network device by using a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell, where the cell The cell corresponding to the access network device (for example, the base station), the cell may belong to the macro base station, or may belong to the base station corresponding to the small cell, where the small cell may include: a metro cell and a micro cell. (Micro cell), Pico cell, Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

In addition, multiple carriers can work at the same frequency on the carrier in the LTE system or the 5G system. In some special scenarios, the concept of the carrier and the cell can be considered to be equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a terminal device, the carrier index of the secondary carrier and the cell identifier (Cell ID) of the secondary cell working in the secondary carrier are simultaneously carried. In this case, the concept of the carrier and the cell can be considered to be equivalent, for example, the terminal device accessing one carrier and accessing one cell are equivalent.

The core network device can be connected to multiple access network devices for controlling the access network device, and can distribute data received from the network side (for example, the Internet) to the access network device.

It should be understood that the functions and specific implementation manners of the terminal device, the access network device, and the core network device listed above are merely exemplary descriptions, and the application is not limited thereto.

1 is a schematic diagram of a system 100 in which a communication method of an embodiment of the present application can be applied. As shown in FIG. 1, the system 100 includes a network device 102, which may include one antenna or multiple antennas such as antennas 104, 106, 108, 110, 112, and 114. Additionally, network device 102 may additionally include a transmitter chain and a receiver chain, as will be understood by those of ordinary skill in the art, which may include multiple components related to signal transmission and reception (eg, processor, modulator, multiplexing) , demodulator, demultiplexer or antenna, etc.).

Network device 102 can communicate with a plurality of terminal devices (e.g., terminal device 116 and terminal device 122). However, it will be appreciated that network device 102 can communicate with any number of terminal devices similar to terminal device 116 or terminal device 122. Terminal devices 116 and 122 can be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radio communication devices, global positioning systems, PDAs, and/or for communicating over wireless communication system 100. Any other suitable device.

As shown in FIG. 1, terminal device 116 is in communication with antennas 112 and 114, wherein antennas 112 and 114 transmit information to terminal device 116 over a forward link (also referred to as downlink) 118 and through the reverse link (also Information referred to as uplink 120 receives information from terminal device 116. In addition, terminal device 122 is in communication with antennas 104 and 106, wherein antennas 104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.

For example, in a Frequency Division Duplex (FDD) system, for example, forward link 118 can use a different frequency band than reverse link 120, and forward link 124 can be used differently than reverse link 126. Frequency band.

For example, in a Time Division Duplex (TDD) system and a Full Duplex system, the forward link 118 and the reverse link 120 can use a common frequency band, a forward link 124 and a reverse link. Path 126 can use a common frequency band.

Each antenna (or set of antennas consisting of multiple antennas) and/or regions designed for communication is referred to as a sector of network device 102. For example, the antenna group can be designed to communicate with terminal devices in sectors of the network device 102 coverage area. The network device can transmit signals to all of the terminal devices in its corresponding sector through a single antenna or multiple antenna transmit diversity. In the course of network device 102 communicating with terminal devices 116 and 122 via forward links 118 and 124, respectively, the transmit antenna of network device 102 may also utilize beamforming to improve the signal to noise ratio of forward links 118 and 124. Moreover, when the network device 102 utilizes beamforming to transmit signals to the randomly dispersed terminal devices 116 and 122 in the associated coverage area, as compared to the manner in which the network device transmits signals to all of its terminal devices through single antenna or multi-antenna transmit diversity, Mobile devices in neighboring cells are subject to less interference.

At a given time, network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting communication device and/or a wireless communication receiving communication device. When transmitting data, the wireless communication transmitting communication device can encode the data for transmission. In particular, the wireless communication transmitting communication device may acquire (eg, generate, receive from other communication communication devices, or store in memory, etc.) a certain number of data bits to be transmitted over the channel to the wireless communication receiving communication device. Such data bits may be included in a transport block (or multiple transport blocks) of data that may be segmented to produce multiple code blocks.

In addition, the communication system 100 may be a PLMN network, a Device to Device (D2D) network, a Machine to Machine (M2M) network, an IoT network, or other networks. FIG. 1 is merely a simplified schematic diagram. Other network devices may also be included in the network, which are not shown in FIG.

The network device in the network or the network device in the PLMN network in the future is not limited in this embodiment.

The transmission object (ie, feedback information) of the embodiment of the present application will be described in detail below.

In the embodiment of the present application, the transmission of the downlink data may adopt a feedback technology, which is not limited by examples. The feedback technology may include, for example, a hybrid automatic repeat request (HARQ) technology.

Among them, the HARQ technology is a technology formed by combining Forward Error Correction (FEC) and Automatic Repeat Request (ARQ).

For example, in the HARQ technology, after receiving data from the transmitting end, the receiving end can determine whether the data is accurately decoded. If the decoding is not possible, the receiving end may feed back the negative-acknowledge (NACK) information to the transmitting end, so that the transmitting end may determine that the receiving end does not accurately receive the data based on the NACK information, so that the retransmission process may be performed; If the decoding can be accurately performed, the receiving end can feed back Acknowledge (ACK) information to the transmitting end, so that the transmitting end can determine that the receiving end accurately receives the data based on the ACK information, so that the data transmission can be determined to be completed.

That is, in the embodiment of the present application, when the receiving end decodes successfully, the ACK information can be sent to the sending end, and when the decoding fails, the NACK information can be fed back to the sending end.

By way of example and not limitation, in the embodiment of the present application, the uplink control information may include ACK information or NACK information in the HARQ technology.

In the LTE system, the downlink time slot and the uplink time slot are respectively based on Orthogonal Frequency Division Multiplexing Access (OFDMA) and Single Carrier-Frequency Division Multiplexing Access (SC). -FDMA), the time-frequency resources are divided into OFDM or SC-FDMA symbols (hereinafter referred to as time domain symbols) in the time domain dimension and subcarriers in the frequency domain dimension, and the smallest resource granularity is called a resource element (Resource Element, RE), which represents a time domain symbol in the time domain and a time-frequency grid consisting of one subcarrier on the frequency domain.

The transmission of services in the LTE system is based on base station scheduling. The basic time unit of scheduling is one subframe, and one subframe includes multiple time domain symbols. The specific scheduling procedure is that the base station sends a control channel, for example, a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH), and the control channel can carry a physical downlink shared channel (Physical). Downlink Shared Channel (PDSCH) or scheduling information of a physical uplink shared channel (PUSCH), and the scheduling information includes, for example, resource allocation information, and adjustment control information such as an encoding method. The terminal device detects the control channel in the subframe, and performs downlink data channel reception or uplink data channel transmission according to the detected scheduling information carried in the control channel.

In the embodiment of the present application, the PDCCH is taken as an example to describe the downlink control channel, and the PDSCH is used as an example to describe the downlink data channel, and the PUCCH is used as an example to describe the uplink control channel, and the ACK/NACK is used as an example to perform feedback information. Description: Take the carrier as an example to describe the frequency domain unit, take the subframe as an example to describe the time unit in the LTE system, use the time slot as an example to describe the time unit in the 5G system, and take the base station as an example for the network device. description of. This application is not limited to this.

Both FDD and TDD duplex modes are supported in the LTE system. For FDD, the downlink subframe and the uplink subframe are transmitted on different carriers. For the TDD system, the uplink subframe and the downlink subframe are transmitted at different times of the same carrier. The special subframe in the frame structure of the TDD can be regarded as a downlink subframe. The special subframe can carry downlink data but cannot carry uplink data.

The LTE system adopts the HARQ mechanism. In the following behavior example, after the terminal device receives the PDSCH, if the receiving is correct, the terminal device feeds back an ACK on the PUCCH. If not correct, NACK is fed back on the PUCCH. For FDD, for example, after receiving the PDSCH in subframe n-4, the terminal device feeds back ACK/NACK in subframe n. For TDD, for example, the timing relationship between the PDSCH reception and its corresponding ACK/NACK feedback is as shown in Table 1. The subframe of the standard number is the uplink subframe n for feeding back ACK/NACK, and the number of the identifier is indicated in the uplink subframe. The ACK/NACK corresponding to the PDSCH in the downlink subframe set of nk (k belongs to K) needs to be fed back.

For example, as shown in Table 1, K={7, 6} in the subframe n=2 of the uplink and downlink configuration 1 indicates that the uplink subframe n=2 is used to feed back two downlink subframes of n-7 and n-6. The ACK/NACK corresponding to the PDSCH is specific, n-7 is the downlink subframe 5, and n-6 is the downlink subframe 6.

Table 1

The LTE system also supports the CA technology, that is, the base station configures multiple carriers to one terminal device to increase the data rate of the terminal device. When the CA is performed, the multiple carriers sent by the base station are synchronized in time, and the terminal device can separately detect the PDCCH and the corresponding PDSCH for scheduling each carrier, wherein the specific detection process of each carrier is similar to the single carrier case described above.

The LTE system also supports FDD CA, TDD CA, and FDD+TDD CA. In the CA mode, there is one primary carrier and at least one secondary carrier. In a typical configuration, the PUCCH carrying the ACK/NACK is sent only on the primary carrier of the terminal device. The PUCCH transmission mode in the CA mode generally uses the mode of the PUCCH format 3. The PUCCH format 3 mode adopts a transmission structure of DFT-S-OFDM, and can support transmission of up to 20 ACK/NACK bits, and can support TDD CA of 5 carriers.

For example, taking the TDD uplink and downlink configuration 2 of the mainstream deployment in the current network as an example, the uplink subframe 2 of one carrier can support the feedback of 4 ACK/NACK bits, and the CA of the TDD uplink and downlink configuration 2 of the 5 carriers is 20 ACKs. /NACK bit. The above 20 bits are called ACK/NACK codebooks, and the ACK/NACK original bits before encoding are arranged in a certain order.

It should be understood that the content of the feedback information listed above is only an exemplary description, and the application is not limited thereto.

The codebook configuration of the uplink ACK/NACK of the LTE system includes a semi-static codebook configuration and a dynamic codebook configuration, and the dynamic codebook configuration determines the codebook based on the number of PDSCHs scheduled in real time.

The semi-static codebook configuration determines the codebook based on the number of downlink subframes in a semi-static downlink subframe set.

For example, the ACK/NACK codebook is composed of feedback information corresponding to all downlink subframes in the semi-static downlink subframe set, and includes the downlink of the actual scheduled PDSCH or Semi-Persistent Scheduling (SPS) release indication. The frame also includes a downlink subframe that is not scheduled. In the codebook, a downlink subframe that is not scheduled or a downlink subframe that the terminal device does not receive scheduling signaling is filled with a NACK to process.

2 is a schematic diagram of an association relationship of an LTE system in the embodiment of the present application (taking a single TDD carrier as an example), specifically, a schematic diagram of a first association relationship based on a semi-static codebook configuration in an LTE system.

For a semi-static codebook configuration, the subframe in which the PUCCH carrying the ACK/NACK codebook is located corresponds to the semi-static downlink subframe set.

For example, the terminal device is configured with 5 TDD carriers for carrier aggregation (other scenarios can be regarded as special cases of the scenario), and the time set may include multiple subframes on the TDD carriers to which the terminal device is configured.

It is assumed that the uplink and downlink subframe configurations between TDD carriers are the same. For example, the uplink subframe 2 in which the PUCCH carrying the ACK/NACK codebook is located corresponds to the downlink subframe set on each carrier on the TDD carriers as {4, 5, 6, 8}.

As shown in FIG. 2 (here, a carrier is taken as an example), the ACK/NACK codebook is composed of 4 downlink subframes on the 5 TDD carriers, that is, the codebook size is the number of bits of the ACK/NACK codebook. 20, it is assumed here that one downlink subframe corresponds to one ACK/NACK bit.

The foregoing uplink subframe 2 is associated with the downlink subframes {4, 5, 6, 8} on each carrier, and the association relationship may be standard pre-configured in the LTE system, that is, no signaling is required. To inform the terminal device.

That is, after acquiring the uplink and downlink configuration of the TDD, the terminal device acquires the association relationship corresponding to the uplink and downlink configuration, so as to obtain the timing relationship between the downlink subframe carrying the PDSCH and the corresponding uplink subframe of the feedback ACK/NACK. .

For example, the timing relationship may receive a timing relationship of the ACK/NACK feedback corresponding thereto as shown in Table 1.

As shown in FIG. 2, in the downlink subframe {4, 5, 6, 8}, the downlink subframe {6, 8} may be a scheduled downlink subframe, and the downlink subframe {4, 5} may be unrecognized. The scheduled downlink subframe. The terminal device may determine whether the data of the downlink subframe {6, 8} is accurately decoded, thereby transmitting ACK/NACK information to the uplink subframe 2. Since the downlink subframe {4, 5} is unscheduled, the downlink subframe is to be processed by sending a NACK to the uplink subframe 2.

Therefore, in the current LTE system, the feedback information of the semi-static codebook configuration, that is, the codebook of the feedback information is determined based on the number of downlink subframes in a semi-static downlink subframe set.

The fallback mechanism in the semi-static codebook configuration is also supported in the LTE system.

For example, if the terminal device is configured with PUCCH format 3 or format 4 or format 5 PUCCH transmission mode (both of these formats can carry more than 2 bits of ACK/NACK on the PUCCH), then:

Codebook and resource fallback mode: If the terminal device only receives the primary PDCCH of the PDSCH on the primary carrier, and the Downlink Assignment Indicator (DAI) field in the primary PDCCH indicates '1', the PUCCH format is used. 1a/1b to feed back ACK/NACK information of 1 bit (for a single codeword) or 2 bits (for a double codeword).

Non-backward mode: If the terminal device receives the primary PDCCH of the PDSCH on the primary carrier, and the value indicated by the DAI field in the primary PDCCH is greater than '1', or receives the secondary PDCCH of the PDSCH on the secondary carrier, the PUCCH format is used. 3 to feedback ACK/NACK. The channel resource of PUCCH format 3 displays an indication by a two-bit field in the primary PDCCH or a two-bit field in the secondary PDCCH that contains a DAI value greater than one.

In this case, the ACK/NACK codebook is composed of the feedback information corresponding to all the downlink subframes in the semi-static downlink subframe set, and includes the downlink subframe that is actually scheduled to be scheduled for PDSCH or SPS release, and the downlink that is not scheduled. In the subframe, the downlink subframe in which the unscheduled downlink subframe or the terminal device does not receive the scheduling signaling is filled in the codebook to be filled with a NACK.

Special fallback mode (considering the PDSCH of the semi-persistent scheduling SPS): If the terminal device only receives the primary PDCCH of the PDSCH on the primary carrier and the PDSCH of one SPS, and the DAI field in the primary PDCCH is indicated as '1', consider In most cases, the SPS PDSCH is not dynamically scheduled by the PDCCH, and there is no field in the primary PDCCH for indicating the PUCCH format 3 resource.

Therefore, at this time, it is impossible to fall back to the PUCCH format 1a/1b, and the PUCCH format 3 resource cannot be used to carry the non-backward codebook. The scheme adopted in the LTE system is a special fallback mode, that is, channel selection is performed between the dynamic PUCCH format 1a/1b resource determined by the primary PDCCH and the semi-static PUCCH format 1a/1b resource corresponding to the SPS PDSCH.

The semi-static codebook configuration, the back-off codebook, and the back-off scheduling mechanism are also supported in the 5G system, but it is different from the LTE system described above, and the first association relationship and the second association relationship exist in the 5G system. . The back-off codebook and the back-off scheduling mechanism in the 5G system will be described below based on the first association relationship and the second association relationship in the 5G system.

First, the first association relationship and the second association relationship in the 5G system will be described.

FIG. 3 is a schematic diagram of association relationships in a 5G system according to an embodiment of the present application. As shown in Figure 3, there are two associations in the semi-static codebook configuration of the 5G system:

It should be understood that the embodiments of the present application are mainly directed to a semi-static codebook configuration, and the following description is mainly based on a semi-static codebook configuration.

First association: similar to the above association in the LTE system, but supports a more flexible configuration.

For example, the first association relationship may be pre-configured or notified to the terminal device by radio resource control (RRC) proprietary signaling.

That is, for the fallback PDCCH scheduling, the first association relationship may be pre-configured. For the non-backward PDCCH scheduling, the first association relationship may be notified to the terminal device by using RRC dedicated signaling.

If the terminal device needs to detect the two PDCCHs at the same time, the first association relationship may be a union of the association relationship between the pre-configured association relationship and the signaling notification.

For example, for a semi-static codebook that needs feedback in the uplink slot n, it may correspond to a downlink slot {n-1, n-2, n-3, n-4, n-5, n-6, n-7. , n-8}, the above 1 to 8 may be pre-configured or notified to the terminal device by RRC dedicated signaling.

In addition, the first association relationship may also be related to the detection slot of the PDCCH.

For example, the first association relationship may be an intersection between the foregoing set of pre-configuration and/or RRC configurations and a PDCCH detection slot.

For example, the period of the PDCCH detection slot is 2 slots, that is, the PDCCH needs to be detected in the slots {n-1, n-3, n-5, n-7}, and the first association relationship may be { N-1, n-2, n-3, n-4, n-5, n-6, n-7, n-8} and {n-1, n-3, n-5, n-7} The intersection of {n-1, n-3, n-5, n-7}.

However, the configuration of the PDCCH detection time slot may be pre-configured or RRC-specific signaling to notify the terminal device. Therefore, the first association relationship may be pre-configuration or RRC-specific signaling to notify the terminal device.

The second association relationship is determined according to timing indication information in the PDCCH. In other words, the second association relationship is indicated to the terminal device by the timing indication information in the PDCCH.

For example, the PDCCH includes 3-bit timing indication information, for example, a timing indication in a Downlink Control Information (DCI), where the timing indication information is used to indicate the time slot and ACK/NACK where the PDSCH scheduled by the PDCCH is located. Timing relationship between time slots.

For example, when the first association relationship is {n-1, n-2, n-3, n-4, n-5, n-6, n-7, n-8}, the timing indication in a certain PDCCH The information may be a value indicated from the eight values of the first association.

As shown in FIG. 3, for the uplink slot i, the set of slots corresponding to the first association relationship and the second association relationship may be the same, and all of the downlink slots 1 to 8. For the uplink time slot j, the time slot set corresponding to the first association relationship is still 1 to 8, but the time slot set corresponding to the second association relationship may include only the downlink time slots 1 and 2, that is, the time slot set corresponding to the second association relationship. It may be a subset of the set of time slots corresponding to the first association.

In the embodiment of the present application, unlike the LTE system, the first association relationship and the second association relationship exist in the 5G system.

An embodiment of the back-off codebook and the back-off scheduling mechanism based on the first association relationship and the second association relationship in the 5G system of the present application will be described in detail below with reference to specific examples.

It should be noted that this is only to help those skilled in the art to better understand the embodiments of the present application, and not to limit the scope of the embodiments of the present application.

It should be understood that, in various embodiments of the present application, the first downlink information, the second downlink information, the first codebook, the second codebook, "first", "second", etc. are only used to refer to different An object does not mean that there are other restrictions on the object being referred to.

4 is an interactive flowchart of a terminal device transmitting feedback information according to an embodiment of the present application.

The terminal device in FIG. 4 may be any one of the terminal devices in FIG. 1 , and the network device in FIG. 4 may also be the network device in FIG. 1 , which is not limited in this application.

It should be noted that, in the embodiment of the present application, the downlink information may be a PDSCH, but the application is not limited.

S410. The terminal device receives at least one downlink information in at least one first time unit of the time unit set, where the time unit set is a set of at least one first time unit on the at least one frequency domain unit configured by the terminal device. .

That is, the network device transmits at least one downlink information to the terminal device in at least one first time unit of the set of time units, the time unit set being at least one first time unit on the at least one frequency domain unit configured by the terminal device set.

It should be understood that the set of time units may be a set of at least one first time unit in different frequency domains, and the first time unit may be a downlink time unit or a flexible time unit for receiving downlink information. A downlink information may be received on the first unit, and multiple downlink information may also be received. This application does not limit this.

Optionally, the time unit may be at least one of a time slot, a micro time slot, and a subframe. For example, in the embodiment of the present application, a time slot may be taken as an example for description.

Optionally, the frequency domain unit may be a carrier or a carrier bandwidth segment (BWP). For example, in the embodiment of the present application, a carrier wave may be taken as an example for description.

S420: The terminal device determines a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship.

Optionally, the second time unit may be an uplink time unit or a flexible time unit. For example, in the embodiment of the present application, the uplink time slot can be taken as an example for description.

Optionally, the first association relationship may be pre-configured or notified to the terminal device by using RRC dedicated signaling. In general, for the backoff PDCCH scheduling, the first association relationship may be pre-configured. For the non-backward PDCCH scheduling, the first association relationship may be notified to the terminal device by using RRC dedicated signaling.

S430, the terminal device determines a first codebook, where the first codebook includes feedback information corresponding to the first downlink information, where the first downlink information in the time unit subset meets a preset condition, The first codebook does not include feedback information corresponding to a specific time unit in the subset of time units, where the specific time unit is at least the first time unit of the time unit set except the first downlink information. a first time unit, the preset condition includes a first condition, where the first condition is that the number of the first downlink information meets a first preset value, and the time unit subset is the time unit set a subset of the time unit subset and the second time unit have a second association relationship.

That is, when the first downlink information in the subset of the time unit satisfies the first downlink information, the first codebook may include only the feedback information corresponding to the first downlink information.

Specifically, the solution may also be applied to a scenario in which a terminal device may schedule multiple PDSCHs that do not overlap in a time domain in a first time unit on one frequency domain unit. For example, a first time unit includes 14 time domain symbols, and the time domain scheduling position in the first time unit is pre-configured to include first to seventh time domain symbols and eighth to fourteenth time domain symbols, the two The group time domain symbol positions are time domain non-overlapping, and for a normal non-backward semi-static codebook, the first time unit corresponds to two bits of ACK/NACK feedback.

The foregoing pre-configuration is configured by using the RRC signaling, and the actual time-scheduled which group of the time-domain scheduling location is actually indicated by the time domain resource allocation indication field in the PDCCH. For example, one bit of the PDCCH may be used to specifically indicate the foregoing two Which of the group time domain symbol locations.

In this scenario, the first codebook includes feedback information corresponding to the first downlink information, and the first codebook does not include feedback information corresponding to the specific time unit in the time unit subset, and the first codebook does not include the The feedback information corresponding to the other time domain scheduling locations except the time domain scheduling location of the PDSCH in the first time unit in which the PDSCH is located, that is, the first codebook only includes the first downlink information, that is, the PDSCH. Corresponding feedback information.

Alternatively, in the above scenario, the different time domain scheduling positions may be regarded as different first time units, for example, the first to seventh time domain symbols and the eighth to the 14th time domain symbols are respectively regarded as The first codebook includes feedback information corresponding to the first downlink information, and the first codebook does not include feedback information corresponding to the specific time unit in the time unit subset.

When the number of the first downlink information in the time unit subset does not satisfy the first condition, the first codebook includes feedback information corresponding to all the first time units in the time unit set.

For example, the first preset value may be 1, and the downlink time slot set includes downlink time slot 1 to downlink time slot 8, that is, the time unit set is the downlink time slot 1 to 8. The downlink time slot subset corresponding to the uplink time slot includes a time slot downlink time slot 1 and a downlink time slot 2, that is, the time unit subset includes a downlink time slot 1 and a downlink time slot 2.

When the number of PDSCHs received on the downlink time slot 1 and the downlink time slot 2 is 1, that is, the first condition included in the preset condition is met, for example, only the PDSCH on the downlink time slot 1 is received, and the ACK/NACK code is received at this time. The ACK/NACK corresponding to the PDSCH in the downlink slot 1 may be included only, and the ACK/NACK corresponding to the other downlink slots in the slots 1 to 8 in the downlink slot set is not included.

When the number of PDSCHs received on the downlink time slot 1 and the downlink time slot 2 is not 1, that is, the first condition included in the preset condition is not met, for example, the PDSCH and the downlink time slot 2 on the downlink time slot 1 are received. The PDSCH, at this time, the ACK/NACK codebook includes the ACK/NACK of the PDSCH in the downlink slots 1 to 8 in the downlink slot set, that is, the back-off codebook is not used, but a normal semi-static codebook is used. This application does not limit this.

For example, the first preset value may be 2, and it is assumed that two dynamically scheduled PDSCHs can be received in one downlink time slot on one carrier, for example, for multiple transmission points or base stations simultaneously on a carrier. A dynamically scheduled PDSCH is transmitted in one downlink slot. Then, the first condition is that when the number of PDSCHs received on one of the downlink time slot 1 and the downlink time slot 2 is 2, that is, the first condition included in the preset condition is met, for example, only the downlink is received. 2 PDSCHs on the time slot 1 at this time, the ACK/NACK codebook may include only the ACK/NACK corresponding to the 2 PDSCHs in the downlink time slot 1, and not include the other time slots 1 to 8 in the downlink time slot set. The ACK/NACK corresponding to the downlink slot. The number of PDSCHs received on the downlink time slot 1 and the downlink time slot 2 does not satisfy the first condition included in the preset condition, for example, the PDSCH on the downlink time slot 1 and the PDSCH on the downlink time slot 2 are received. The ACK/NACK codebook includes the ACK/NACK of the PDSCH in the downlink slots 1 to 8 in the downlink slot set, that is, the back-off codebook is not used, but a normal semi-static codebook is used. It should be understood that this application does not limit this.

Optionally, the technical solution of the embodiment of the present application may be applicable to a scenario in which one DCI schedules multiple PDSCHs. As shown in FIG. 5, for the uplink slot i, the set of slots corresponding to the first association relationship and the second association relationship may be the same, and all of the downlink slots 1 to 8. For the uplink time slot j, the time slot set corresponding to the first association relationship is still 1 to 8, but the time slot set corresponding to the second association relationship may include only downlink time slots 1 and 2, that is, the time unit subset includes the downlink time slot 1 And the downlink time slot 2, in addition, the PDSCH of the downlink time slot 1 and the PDSCH of the downlink time slot 2 are scheduled by one DCI, that is, a scenario in which one DCI schedules multiple PDSCHs.

The first preset value is X, and X may be a positive integer greater than or equal to 1. For example, X=1, 2, 3, 4, 5, 6, 7, 8. The first time unit may be a time unit of the symbol of the last one of the plurality of first downlink information, or may be a symbol of the first one of the plurality of first downlink information. Time unit. For example, the downlink time slot 1 to the downlink time slot 4 where the four PDSCHs are located, and the first time unit corresponding to the four PDSCHs may be the downlink time slot 4 or the downlink time slot 1.

For example, in the embodiment of the present application, the first preset value may be 4, that is, it is assumed that four PDSCHs can be received in at least one downlink time slot on one carrier, and the four PDSCHs are used to carry the same transport block information. . The four PDSCHs are scheduled for one DCI. Then, when the time unit subset satisfies the first condition in the preset condition, that is, the number of the first downlink information in the time unit subset satisfies the first preset value, the terminal performs the codebook fallback.

For example, the downlink time slot set includes downlink time slot 1 to downlink time slot 8, and the downlink time slot corresponding to the uplink time slot includes downlink time slot 1 and downlink time slot 2, that is, the time unit subset includes downlink time slot 1 and downlink. Slot 2, if the number of PDSCHs received only on downlink slot 2 is 4. At this time, the ACK/NACK codebook may include only the ACK/NACK corresponding to the four PDSCHs in the downlink slot 2, and does not include the ACK/NACK corresponding to the other downlink slots in the slots 1 to 8 in the downlink slot set. . If the number of PDSCHs received on the time slot 1 is 4, the number of PDSCHs received on the downlink time slot 2 is 4. At this time, the ACK/NACK codebook includes the PDSCH in the downlink time slots 1 to 8 in the downlink time slot set. The ACK/NACK, that is, not backing up the codebook, uses a normal semi-static codebook.

It should be noted that, in the embodiment of the present application, when the time unit subset satisfies the first condition in the preset condition, that is, the number of the first downlink information in the time unit subset satisfies the first preset value, which may be The number of the first downlink information on only one time unit in the time unit subset is equal to the first preset value, or the number of the first downlink information on only one time unit in the time unit subset may be less than the first preset value. .

For example, in the embodiment of the present application, the first preset value may be 4, that is, it is assumed that four PDSCHs can be received in at least one downlink time slot on one carrier, and the four PDSCHs are used to carry the same transport block information. . These 4 PDSCHs are scheduled for one DCI. Then, the first condition at this time is that when the number of PDSCHs received on at least one downlink time slot in the time unit subset is less than or equal to 4, that is, the first condition included in the preset condition is met.

For example, only the four PDSCHs on the downlink time slot 1 are received, and the ACK/NACK codebook may include only the ACK/NACK corresponding to the four PDSCHs in the downlink time slot 1 without including the downlink time slot set. ACK/NACK corresponding to other downlink slots in slots 1 to 8.

In the embodiment of the present application, the number of the first downlink information in the subset of time units may be smaller than the first preset value, for example, only three PDSCHs on the downlink time slot 1 to the downlink time slot 3 are received, and the three The PDSCH is scheduled by one DCI. In this case, the ACK/NACK codebook may include only the ACK/NACK corresponding to the three PDSCHs on the downlink time slot 1 to the downlink time slot 3, and does not include the time slot 1 in the downlink time slot set. ACK/NACK corresponding to other downlink time slots in 8.

When the number of PDSCHs received in the time unit subset does not satisfy the first condition included in the preset condition, the ACK/NACK codebook includes the ACK/NACK of the PDSCH in the downlink time slots 1 to 8 in the downlink time slot set, that is, does not do Instead of backing up the codebook, use a normal semi-static codebook.

For example, five PDSCHs are received in at least one time slot in the time unit subset. At this time, the ACK/NACK codebook includes the ACK/NACK of the PDSCH in the downlink time slots 1 to 8 in the downlink time slot set, that is, no back Instead of a codebook, use a normal semi-static codebook.

It should be understood that when multiple PDSCHs are received in at least one time slot in the time unit subset, when the multiple PDSCHs are not scheduled by the same DCI, the back-off codebook is not used, but a normal semi-static codebook is used.

For example, when the first preset value may be 4, 4 PDSCHs are received in at least one time slot in the time unit subset, and the 4 PDSCHs are from scheduling of two DCIs. At this time, the ACK/NACK codebook includes the downlink. The ACK/NACK of the PDSCH in the downlink slots 1 to 8 in the slot set, that is, the back-off codebook is not used, but a normal semi-static codebook is used. It should be understood that the fourth embodiment of the present application is merely illustrative and does not limit the embodiments of the present application.

It should be noted that, in the embodiment of the present application, the first preset value needs to meet the third preset value that is less than or equal to the third preset value, and the third preset value is determined according to the downlink aggregation parameter configured by the high layer signaling of the base station, and the downlink aggregation is performed. The parameter is the number of times the information in the first downlink information is repeatedly transmitted. The downlink aggregation parameter may be the number of times the information in the first downlink information in a time slot is repeatedly transmitted, or the downlink aggregation parameter may be the number of times the information in the first downlink information on multiple time slots is repeatedly transmitted. This application does not limit this.

Optionally, the downlink aggregation parameter may be a number of times that information is repeatedly transmitted in the first downlink information in one time slot, and then the first condition may be applied to one or more downlink time slots of the downlink time slot set.

For example, the first preset value may be 2, that is, it is assumed that two PDSCHs can be received in only one downlink time slot on one carrier of the time unit subset (downlink slot 1 and downlink slot 2), the two The PDSCH is used to carry the same transport block information. These two PDSCHs are scheduled for one DCI. Then, the first condition may be that the number of PDSCHs received on one downlink time slot in the time unit subset is less than or equal to 2, that is, the first condition included in the preset condition is met. For example, only the two PDSCHs on the downlink time slot 1 are received, and the ACK/NACK codebook may include only the ACK/NACK corresponding to the two PDSCHs in the downlink time slot 1 without including the downlink time slot set. ACK/NACK corresponding to other downlink slots in slots 1 to 8.

The number of PDSCHs received in the subset of time units does not satisfy the first condition included in the preset condition, for example, three PDSCHs are received on the time slots in the subset of time units, for example, three are received on the downlink time slot 2. The PDSCH, at this time, the three PDSCHs are larger than the first preset value, and thus the condition is not satisfied. At this time, the ACK/NACK codebook includes the ACK/NACK of the PDSCH in the downlink slots 1 to 8 in the downlink slot set, that is, the back-off codebook is not used, and the normal semi-static codebook is used.

The correspondence between the number of PDSCHs received in the time unit subset and the downlink aggregation parameter does not satisfy the first condition included in the preset condition, for example, one PDSCH is received on the downlink slot 1 and one PDSCH is received on the downlink slot 2. At this time, the ACK/NACK codebook includes the ACK/NACK of the PDSCH in the downlink slots 1 to 8 in the downlink slot set, that is, the back-off codebook is not used, but the normal semi-static codebook is used, which should be understood. Therefore, the two PDSCHs do not belong to the same downlink time slot. Therefore, it can be considered that the downlink aggregation parameter is not a condition for the number of times the information is repeatedly transmitted in the first downlink information in one time slot. It should be understood that 2 in the embodiments of the present application are merely illustrative and do not limit the embodiments of the present application.

Optionally, the downlink aggregation parameter may be a number of times that information is repeatedly transmitted in the first downlink information on the multiple time slots, and then the first condition is applied to multiple downlink time slots of the downlink time slot set.

For example, the first preset value may be 2, that is, it is assumed that two PDSCHs may be received in two downlink slots on one carrier in the time unit subset (downlink slot 1 and downlink slot 2), the two PDSCHs Used to carry the same transport block information. The two PDSCHs are scheduled for one DCI. Then, the first condition is that the number of PDSCHs received in the plurality of downlink time slots of the downlink time slot set in the time unit subset is less than or equal to 2, that is, the first condition included in the preset condition is met.

For example, one PDSCH is received on the downlink time slot 1 and the downlink time slot 2, and the ACK/NACK codebook may include only the ACK/NACK corresponding to the two PDSCHs in the downlink time slot 1 and the downlink time slot. The ACK/NACK corresponding to other downlink slots in slots 1 to 8 in the downlink slot set is not included.

The number of PDSCHs received in the time unit subset does not satisfy the first condition included in the preset condition. For example, two PDSCHs are received on the downlink time slot 1 and one PDSCH is received on the downlink time slot 2. At this time, the ACK/ The NACK codebook includes the ACK/NACK of the PDSCH in the downlink time slots 1 to 8 in the downlink time slot set, that is, the back-off codebook is not used, but a normal semi-static codebook is used. It should be understood that the three PDSCHs at this time It is larger than the first preset value, so it can be considered that the condition is not satisfied.

The correspondence between the number of received PDSCHs and the downlink aggregation parameters does not meet the first condition included in the preset condition. For example, only two PDSCHs on the downlink slot 1 are received. At this time, the ACK/NACK codebook includes the downlink slot set. The ACK/NACK of the PDSCH in the mid-downlink slots 1 to 8, that is, the back-off codebook is not used, but a normal semi-static codebook is used. It should be noted that the two PDSCHs belong to the same downlink slot at this time, so It can be considered that the failure to satisfy the downlink aggregation parameter may be a condition for the number of times the information in the first downlink information on the plurality of slots is repeatedly transmitted. It should be understood that 2 in the present application is only an example and is not limited thereto.

It should be understood that when the first preset value is 8, the 8 PDSCHs are used to carry the same transport block information, and the 1st bit can be used to indicate whether the terminal receives the transport block information of the 8 PDCSH bearers, and the terminal is accurate to the data. Decoding; the terminal can also indicate whether the terminal accurately decodes the data after receiving the transport block information carried by each of the 8 PDCSHs by the receiving end. This embodiment of the present application does not limit this.

It should be noted that the first preset value needs to meet the third preset value that is less than or equal to the third preset value, and the third preset value is determined according to the downlink aggregation parameter configured by the high layer signaling of the base station. It can be understood that the downlink aggregation parameter may be the number of times the information in the first downlink information is repeatedly transmitted. When the third preset value is Y, X is less than or equal to Y. Y can be a positive integer greater than or equal to 1. This application does not limit this

Optionally, the first condition includes that the number of the first downlink information is less than or equal to a first preset value and not greater than a third preset value, where the time unit subset is the time unit. a subset of the set, the subset of time units having a second association with the second unit of time. Optionally, the first condition further includes that the downlink aggregation parameter is greater than 1. Optionally, the first preset value is greater than 1.

Optionally, the first condition includes that the number of the first downlink information meets a first preset value that is less than or equal to a first preset value, where the subset of time units is a subset of the set of time units, the time The unit subset has a second association with the second time unit. Optionally, the first condition further includes that the downlink aggregation parameter is greater than 1. Optionally, the first preset value is greater than 1.

Optionally, the first preset value is a number of bits of feedback information corresponding to a first time unit on a frequency domain unit in a semi-static codebook configuration. In addition, if the number of dynamically scheduled PDSCHs received in the subset of time units is less than a first preset value, and the PDSCHs are all in a first time unit on the one frequency domain unit, for the first codebook The bits other than the ACK/NACK bits corresponding to the PDSCH described above are NACK-filled. The solution is mainly applied to a PDSCH in which a terminal device can be scheduled in a first time unit on a frequency domain unit and does not overlap in a time domain. For example, a first time unit includes 14 time domain symbols, and the first time unit is configured. The time domain scheduling position in a time unit includes the first to seventh time domain symbols and the 8th to 14th time domain symbols, and the two sets of time domain symbol positions are time domain non-overlapping, then for normal non-return In the semi-static codebook, the first time unit corresponds to two bits of ACK/NACK feedback, that is, the first preset value is 2. The above-mentioned pre-configuration is configured by using RRC signaling, and specifically, which group of the time domain scheduling location is actually scheduled by the time domain resource allocation indication field in the PDCCH, for example, one bit of the PDCCH may be used to specifically indicate the two groups. Which group of time domain symbol positions.

Under the above alternatives, it can be divided into the following two cases:

Case 1: When the number of dynamically scheduled PDSCHs received in the time unit subset is 1, the size of the first codebook is the first preset value, that is, one of the frequency domain units under the semi-static codebook configuration. The number of bits of feedback information corresponding to the first time unit. NACK padding is performed on bits other than the ACK/NACK bits corresponding to the PDSCH in the first codebook. For example, in the above example, the first preset value is 2, then the size of the first codebook is two bits, and the NACK padding is performed for the ACK/NACK position corresponding to the other time domain scheduling position of the PDSCH that has not received the PDSCH.

Case 2: when the number of dynamically scheduled PDSCHs received in the time unit subset is greater than 1 and the PDSCHs are all in a first time unit on the one frequency domain unit, the size of the first codebook is the foregoing A preset value, that is, the number of bits of feedback information corresponding to a first time unit on a frequency domain unit in a semi-static codebook configuration. For example, in the above example, the first preset value is 2, and if the number of dynamically scheduled PDSCHs received in the time unit subset is 2, the size of the first codebook is 2 bits, corresponding to the two sets of time domains respectively. The ACK/NACK feedback of the PDSCH of the scheduling location.

Optionally, in the embodiment of the present application, the second association relationship is an association relationship determined by the dynamically scheduled downlink control channel.

For example, the second association relationship may be determined by timing indication information in the PDCCH. In other words, the second association relationship is indicated to the terminal device by the timing indication information in the PDCCH. The PDCCH includes 3-bit timing indication information, which is used to indicate a timing relationship between a time slot in which the PDSCH scheduled by the PDCCH is located and a time slot in which the ACK/NACK is located. Taking the first association relationship as {n-1, n-2, n-3, n-4, n-5, n-6, n-7, n-8} as an example, then the timing indication in a certain PDCCH The information is a value indicated from the eight values of the first association.

Optionally, in the embodiment of the present application, the preset condition may further include a second condition, where the second condition is that the value of the indication information in the downlink control channel that dynamically schedules the first downlink information is Two preset values, and the downlink control channel is a control channel used for backoff scheduling.

In an embodiment of the present application, for example, the second preset value may be a preset DAI value.

For example, the time unit subset includes a downlink time slot 10 and a downlink time slot 11, and the first preset value of the number of first downlink information in the first condition may be 1.

Assume that the second preset value has a value of 1. The value of the DAI included in the PDCCH for scheduling the PDSCH in the downlink time slot 10 is 1, and the value of the DAI included in the PDCCH for scheduling the PDSCH in the downlink time slot 11 is 2, and the terminal device misses the downlink time slot 11 at this time. PDCCH, the terminal device detects only one scheduled PDSCH, and the first condition is that the number of downlink control information is 1 (for example, when the first preset value is 1); the second preset included in the downlink time slot 10 If the value satisfies the second condition being 1, the terminal device sends the ACK/NACK corresponding to the PDSCH in the downlink time slot 10 to the base station. At this time, the base station and the terminal device have the same understanding of the back-off codebook, that is, both of the ACK/NACKs in the back-off codebook are corresponding to the PDSCH whose DAI is 1 (for example, in the downlink time slot 10 described above). PDSCH). This application does not limit this.

Optionally, in the embodiment of the present application, the downlink control channel may be a control channel used for backoff scheduling.

In the embodiment of the present application, for example, the downlink control channel of the fallback scheduling may have at least one of the following features. For example, the downlink control channel of the backoff scheduling may be used for data scheduling before RRC establishment, and downlink of the backoff scheduling. The values of all the fields in the control channel cannot be configured through RRC proprietary signaling.

In an embodiment of the present application, for example, the terminal device may be detected by a downlink control channel that is not back-off scheduled. The control channel of the non-backoff scheduling may have at least one of the following features, for example, for data scheduling after RRC establishment, and the value of at least one field in the control channel may be configured through RRC dedicated signaling.

For example, the downlink control channel of the non-backoff scheduling may configure a time domain resource allocation field, a DAI field, a BWP indication field, and the like through RRC dedicated signaling.

Optionally, the indication information included in the downlink control channel that dynamically schedules the first downlink information may be a DAI field, and the preset value is preferably a value represented by DAI=1 or a DAI field of “00”.

Optionally, in the embodiment of the present application, the preset condition may further include a third condition, where the first time unit in which the first downlink information is located is in the time unit set. The first time unit of a particular time domain location.

Optionally, the specific time domain location may be one or more.

For a scenario in which a terminal device may have multiple candidate time domain locations in one time slot on one carrier, the multiple candidate time domain locations are predefined by RRC pre-configuration or standard, and the multiple candidate time domain locations are predefined. They can overlap each other in time domain, but in actual scheduling, they generally do not overlap in time domain.

For example, a time slot includes 14 time domain symbols, and a plurality of pre-configured candidate time domain locations in a time slot include first, second, third, and fourth candidate time domain locations, respectively: Up to the 4th time domain symbol, the 3rd to 6th time domain symbols, the 7th to 10th time domain symbols, and the 9th to 14th time domain symbols, the maximum time of the 4 sets of time domain symbol positions If the number of candidate time domain locations that do not overlap in the domain is two, then for a semi-static codebook with normal non-return, one slot on one carrier needs to feed back two ACK/NACK bits. The pre-configured four sets of time domain symbol positions are configured by using RRC signaling, and specifically, which group of time domain scheduling positions are actually scheduled by the time domain resource allocation indication field in the PDCCH, for example, may be used in the PDCCH. 2 bits to specifically indicate which of the above four sets of time domain symbol positions.

Assuming that the first preset value is 1, it is necessary to determine which PDSCH the only one PDSCH received by the terminal device in the time unit subset is corresponding to the backoff codebook, or the first time unit in which the PDSCH is located is The back-off codebook is corresponding to the PDSCH scheduled at which specific time domain location in the time unit set.

Therefore, optionally, each of the candidate time domain locations is regarded as the first time unit, and the specific time domain location may be a plurality of first time units that are not overlapped in the maximum time domain included in one time slot. A particular first time unit, and also a first time unit that overlaps with a time domain of the particular first time unit in the time slot.

Specifically, the plurality of first time units that are not overlapped in the time slot in the time slot are the first and third candidate time domain locations, where a specific first time unit needs to be determined according to a preset rule, for example, the specific The first time unit is the first time unit of the first time zone symbol of the first time unit in the foregoing first time unit, for example, the specific first time unit is determined as the first candidate time domain location, and then the first candidate The time domain location in which the time domain location has time domain overlap also includes the third candidate time domain location, because multiple candidate time domain locations with time domain overlap may only be scheduled for one candidate time domain location during actual scheduling, therefore, the above The first time unit corresponding to the first candidate third time domain position may be the specific time domain position described above.

In the embodiment of the present application, it is assumed that the first preset value of the first condition included in the preset condition is 1, and the third condition is that the first time unit of the specific time domain position is the earliest downlink time slot.

For example, if the terminal device receives the dynamically scheduled PDSCH in the downlink time slot subset corresponding to the downlink time slot, the first preset value is 1, and the downlink time slot where the dynamically scheduled PDSCH is located is the downlink time slot. The preset time domain location in the set, that is, the earliest downlink time slot in the downlink time slot set. The ACK/NACK codebook may include only the ACK/NACK corresponding to the PDSCH in the slot 1 and the ACK/NACK corresponding to the other downlink slots in the downlink slot set corresponding to the slot i.

Optionally, in the embodiment of the present application, the preset condition may further include a fourth condition, where the fourth condition is that the first downlink information is carried in a primary frequency of the at least one frequency domain unit. Unit or primary auxiliary unit.

For example, the terminal device may be configured with multiple carriers, and the codebook fallback may be based on whether one PDSCH is scheduled, and the one PDSCH may select a predetermined carrier. For example, the primary carrier, the primary bandwidth portion, the primary secondary carrier, and the primary attached bandwidth portion.

Taking the carrier as an example, the primary secondary carrier may be the primary carrier in the secondary carrier group in the dual connectivity mode, or the primary secondary carrier may be the secondary carrier carrying the PUCCH.

It should be understood that, in the embodiment of the present application, the preset condition includes the first condition, and may further include any one or more of the second condition, the third condition, and the fourth condition. For example, the preset condition includes a second condition and a third condition in addition to the first condition. The preset condition includes a second condition and a fourth condition in addition to the first condition. This application does not limit this.

Optionally, the value of the indication information is set according to a preset rule related to the subset of the time unit.

That is, the value of the indication information included in the downlink control channel corresponding to the first downlink information included in the time unit subset is set according to a preset rule, and the preset rule and the time unit set are removed. The value of the indication information included in the downlink control channel corresponding to the downlink information except the time unit subset is irrelevant.

For example, the downlink time slot set includes downlink time slot 1 to downlink time slot 1 to 8, that is, the time unit set is the downlink time slot 1 to 8. The downlink time slot subset corresponding to the uplink time slot includes a time slot downlink time slot 1 and a downlink time slot 2, that is, the time unit subset includes a downlink time slot 1 and a downlink time slot 2. The value of the indication information is related to the value of the indication information included in the downlink control channel of the PDSCH in the downlink time slot 1 and the downlink time slot 2, and in the downlink control channel of the PDSCH in the downlink time slot 3 to the downlink time slot 8 The value of the included indication information is irrelevant.

It should be understood that, in the embodiment of the present application, the value of the indication information may be a value of the DAI.

Optionally, in the embodiment of the present application, in the at least one first time unit on each of the at least one frequency domain unit in the time unit subset, the preset rule is a time unit. The cumulative count is performed in the order before and after.

For example, the preset rule may be that the value of the indication information of the at least one time unit of the time unit subset of the first frequency domain unit may be counted as {1, 2, 3, 4, 1, 2, 3, 4, .. .}. The value of the indication information of the at least one time unit of the subset of time units of the second frequency domain unit may be counted as {1, 2, 3, 4, 1, 2, 3, 4, ...}, Not limited. It should be noted that the number of bits in the DAI field is generally 2, and only there are 4 states of '00' '01''10''11', and the corresponding values may be 1, 2, 3, and 4, respectively. They are 0, 1, 2 and 3. For example, taking the values 1, 2, 3, and 4 as an example. If it exceeds 4, it can be counted cyclically. For example, the above counts {1, 2, 3, 4, 1, 2, 3, 4, ...} actually The count is {1, 2, 3, 4, 5, 6, 7, 8, ...}.

Optionally, in the embodiment of the present application, in the at least one first time unit of the at least one frequency domain unit in the subset of time units, the preset rule is performed in an order of a pre-frequency domain and a time domain. Cumulative count.

For example, the preset rule may be that the time unit 1 in the frequency domain unit 1 is identified as 1, the time unit 1 in the frequency domain unit 2 is identified as 2, the time unit identifier in the frequency domain unit 3 is 3, and so on. Indicates that the time unit 2 in the frequency domain unit 1 is identified as 4, the time unit 2 in the frequency domain unit 2 is identified as 5, and the time unit 2 in the frequency domain unit 3 is identified as 6, etc., that is, the preset rule is the first frequency. The order of the time domain after the domain is counted cumulatively.

In the embodiment of the present application, the DAI independent cumulative counting is performed in the subset of time slots, which solves the error situation that the terminal device and the base station understand that the codebook fallback may be inconsistent.

Optionally, in the embodiment of the present application, the first association relationship is predefined to the standard and/or the network device is configured to the terminal device by using RRC signaling.

S440: The terminal device sends uplink control information in the second time unit, where the uplink control information carries the first codebook.

That is, the terminal device is in the second time unit, and the second time unit may send the first codebook for the uplink time unit.

Optionally, the second time unit may be an uplink time unit or a flexible time unit. The above time slot is taken as an example for description in the embodiment of the present invention.

It should be noted that the terminal device may send the first codebook encoded/modulated signal in the second time unit.

Optionally, in the embodiment of the present application, the at least one downlink information may further include second downlink information, where the downlink control channel that schedules the second downlink information is a semi-persistently scheduled downlink control channel, where the The codebook further includes feedback information corresponding to the second downlink information.

Optionally, in the embodiment of the present application, before the terminal device determines the first codebook, the terminal device determines a semi-static codebook mode from multiple candidate codebook modes, where the multiple candidate codebook modes are Includes semi-static codebook mode and dynamic codebook mode.

Optionally, in the embodiment of the present application, before the terminal device sends the feedback information in the second time unit according to the first codebook, the terminal device determines a target resource set of an uplink control channel. Determining, in the target resource set, a target resource of the uplink control channel, where the terminal device sends uplink control information on the target resource in the second time unit, where the uplink control information carries the first codebook .

For example, in a case where the number of the first downlink information in the at least one downlink information is the first preset value (for example, the first preset value is 1) or the other conditions are met, that is, the current time A codebook is a back-off codebook, and the target resource set is a first resource set, and the codebook size of the first resource set corresponding to the first codebook is less than or equal to 2.

That is, when the number of the first downlink information, that is, the first condition that the number of PDSCHs meets the preset condition, for example, the first preset value is 1, that is, the terminal device detects a scheduled PDSCH. At the time of the PDCCH, the terminal device can perform codebook fallback. At this time, the terminal device sends the first codebook of the feedback information by using the first target resource in the first resource set.

Optionally, in the embodiment of the present application, in a case where the number of the first downlink information in the at least one downlink information is not the first preset value, the target resource set is a second resource set, where The codebook size corresponding to the first codebook of the second resource set is greater than 2, that is, the non-return codebook or the normal semi-static codebook. At this time, the terminal device sends the first codebook of the feedback information through the second target resource in the second resource set.

It should be understood that, in the embodiment of the present application, the first downlink information may also be dynamically scheduled downlink information.

For example, a downlink semi-persistent scheduling SPS release indication or a dynamically scheduled downlink data channel may be included. The dynamically scheduled downlink data channel can be scheduled by a dynamic downlink control channel.

It should be noted that dynamic scheduling means that each downlink data channel transmission requires a corresponding downlink control channel for scheduling.

Corresponding to the dynamically scheduled downlink data channel is a semi-persistently scheduled downlink data channel, which is scheduled by a semi-persistent downlink control channel. That is, after the semi-persistent downlink control channel is transmitted once, the corresponding semi-persistent downlink data channel can be transmitted according to the pre-configured transmission period without having to transmit a semi-continuous downlink control channel every time.

The semi-persistent downlink scheduling may be released by using a specific downlink control channel, and the downlink control channel used to implement the release indication of the downlink semi-persistent scheduling is generally not used for scheduling the downlink data channel, but the terminal device also needs to feed back an ACK/NACK. Feedback.

It should be understood that the embodiment of the present application may also describe the downlink information by using a dynamically scheduled downlink data channel as an example. This application does not limit this.

Optionally, in the embodiment of the present application, in the dynamic codebook mode, the terminal device may determine a second codebook of the feedback information, where the second codebook includes the first time unit that is actually scheduled in the time unit set. Corresponding feedback information.

In the implementation of the present application, in the semi-static codebook mode, for a time slot in which the feedback information is sent, in a case where a plurality of downlink data are scheduled in a plurality of time units in the time unit set corresponding to the first association relationship When the number of downlink data corresponding to the second association relationship is the first preset (for example, the first preset value is 1), the codebook fallback may be performed. When several other conditions in the preset conditions are satisfied, the demodulation performance of the feedback information is improved.

FIG. 6 is a schematic diagram of a feedback information fallback mode according to an embodiment of the present application.

It should be understood that FIG. 6 is a description of an embodiment using a single carrier as an example, and an embodiment of the present application may be extended to a case of multiple carriers.

In FIG. 6, the downlink time slot set corresponding to the uplink time slot i (for example, the first time unit set) includes time slots 1 to 8, wherein the base station actually schedules the PDSCH to the terminal device in each downlink time slot. The downlink time slot set corresponding to the uplink time slot j includes time slots 4 to 11, wherein the base station actually schedules the PDSCH to the terminal device in the time slots 4 to 8 and the time slots 10 and 11, and does not schedule the downlink time slot 9 to the terminal device. .

The terminal device can feed back ACK/NACK information to the base station in the uplink slots i and j, respectively. The first association relationship exists between the uplink time slot i and the downlink time slots 1 to 8, and the first association relationship exists between the uplink time slot j and the downlink time slots 4 to 11. The first association relationship is specifically candidate scheduling. The timing relationship between the time slot of the PDSCH and the ACK/NACK time slot is 1 to 8 time slots. Specifically, the terminal device can be notified by RRC dedicated signaling through standard pre-defined or base stations.

The downlink time slot subset corresponding to the uplink time slot i includes time slots 1 to 8, and the downlink time slot subset corresponding to the uplink time slot j includes time slots 10 and 11. It can be seen that the downlink time slot subset corresponding to the uplink time slot i is a subset of the downlink time slot set corresponding to the uplink time slot i, and the downlink time slot subset corresponding to the uplink time slot j is the downlink time corresponding to the uplink time slot j. A subset of the gap set.

For example, there is a second association between the uplink time slot i and the downlink time slots 1 to 8, and a second association relationship exists between the uplink time slot j and the downlink time slots 10 and 11. The second association relationship is a timing relationship between the time slot of the actually scheduled PDSCH and the ACK/NACK time slot, and the timing relationship is determined by the timing indication information in the PDCCH of the actually scheduled PDSCH, that is, the second association relationship is dynamically scheduled by the PDSCH. The timing indication information in the PDCCH is determined.

In the embodiment of the present application, for example, the above-mentioned time slot j feeds back ACK/NACK as an example to describe the feedback information fallback mode:

Assume that the first preset value is 1, if the number of dynamically scheduled PDSCHs received by the terminal device in the downlink time slot subset corresponding to the uplink time slot j is 1 (even if the terminal device is in the time slot 4 included in the downlink time slot set) A plurality of dynamically scheduled PDSCHs are received in the time slot 11, that is, the first condition included in the preset condition is met. This application does not limit this.

For example, the PDSCH that is dynamically scheduled in the downlink time slot 10 is received, and the PDCCH of the PDSCH that dynamically schedules the PDSCH in the downlink time slot 11 is missed. At this time, the ACK/NACK codebook (ie, the first codebook) may include only the downlink time. The ACK/NACK corresponding to the PDSCH in the slot 10 does not include the ACK/NACK corresponding to the other downlink slots in the slots 4 to 11 in the downlink slot set corresponding to the uplink slot j. This application does not limit this.

For example, the PDCCH that dynamically schedules the PDSCH in the downlink time slot 10 and the line time slot 11 is received, and the number of downlink information is 2, which does not satisfy the first condition included in the preset condition, that is, the first preset value is not satisfied. . At this time, the ACK/NACK codebook includes ACK/NACK in the downlink slots 4 to 11 in the downlink slot set. That is, instead of backing up the codebook, a normal semi-static codebook is used. This application does not limit this.

In order to support the above-mentioned back-off codebook, the value of the above DAI field may be performed according to a preset rule, thereby avoiding an error situation that may occur during codebook fallback.

For example, if the DAI in the PDCCH corresponding to the downlink time slots 10 and 11 is set to the preset value 1, the terminal device sends the downlink time slot by using the backoff codebook if the PDCCH corresponding to the downlink time slot 10 is missed. 11 corresponding 1-bit ACK/NACK. Alternatively, if the terminal device misses the PDCCH corresponding to the downlink time slot 11, the terminal device transmits the 1-bit ACK/NACK corresponding to the downlink time slot 10 by using the back-off codebook, and the base station does not know which terminal device will miss the check, and therefore The back-off codebook corresponds to which downlink time slot causes fuzzy recognition.

The value of the DAI included in the PDCCH corresponding to the dynamic scheduling PDSCH included in the downlink time slot subset may be set according to a certain preset rule.

In addition, it is considered that the backoff codebook only occurs in the time slot indication information or the slot subset corresponding to the second association relationship, and therefore the foregoing preset rule is in the PDCCH corresponding to the PDSCH except the slot subset in the slot set. The value of the included DAI is irrelevant.

For example, the DAI value-of-value rule in the downlink time slot subset corresponding to the uplink time slot j is cumulatively counted from the preset value in time sequence, that is, the downlink time slot 10 corresponds to DAI=1, and the downlink time slot 11 corresponds to DAI=2.

Optionally, for at least one downlink time slot on each carrier of the at least one carrier in the downlink time slot subset (for example, the time unit subset), the preset rule may be cumulatively counted in time before and after the downlink time slot. Or, for at least one downlink time slot of at least one carrier in the downlink time slot subset, the preset rule may be cumulatively counted in the order of the time domain after the time domain.

For example, the preset rule may be that the value of the indication information of the at least one time unit of the time unit subset of the first frequency domain unit may be counted as {1, 2, 3, 4, 1, 2, 3, 4, .. .}. The value of the indication information of the at least one time unit of the subset of time units of the second frequency domain unit may be counted as {1, 2, 3, 4, 1, 2, 3, 4, ...}, Not limited. It should be noted that the number of bits in the DAI field is generally 2, and only there are 4 states of '00' '01''10''11', and the corresponding values may be 1, 2, 3, and 4, respectively. They are 0, 1, 2 and 3. For example, taking the values 1, 2, 3, and 4 as an example. If it exceeds 4, it can be counted cyclically. For example, the above counts {1, 2, 3, 4, 1, 2, 3, 4, ...} actually The count is {1, 2, 3, 4, 5, 6, 7, 8, ...}.

For another example, the preset rule may be that the time unit 1 in the frequency domain unit 1 is identified as 1, the time unit 1 in the frequency domain unit 2 is identified as 2, the time unit identifier in the frequency domain unit 3 is 3, and so on. Indicates that the time unit 2 in the frequency domain unit 1 is identified as 4, the time unit 2 in the frequency domain unit 2 is identified as 5, and the time unit 2 in the frequency domain unit 3 is identified as 6, etc., that is, the preset rule is the first frequency. The order of the time domain after the domain is counted cumulatively.

The second subset of time unit and the second time unit may have a second association relationship. Since the actually scheduled PDSCH time slot in the downlink time slot set is not necessarily indicated, the timing indication information is indicated in the uplink time slot j.

For example, the actually scheduled downlink time slots 4 to 8 in the above set correspond to the uplink time slot i through the timing indication information, and only the downlink time slots 10 and 11 in the set are corresponding to the uplink time slot j by the timing indication information, so the terminal device It may be only necessary to determine whether to perform codebook fallback according to whether the number of dynamically scheduled PDSCHs in the foregoing subset is the first preset value.

Optionally, the preset condition that satisfies the foregoing codebook fallback may further include the following conditions:

Optionally, the preset condition further includes a second condition, where the second condition is that the value of the indication information in the downlink control channel that dynamically schedules the first downlink information is a second preset value.

For example, the value of the DAI included in the PDCCH of only one PDSCH in the received dynamic scheduling slot subset may be a second preset value.

For example, the second preset value takes a value of 1. The value of the DAI included in the PDCCH for scheduling the PDSCH in the downlink time slot 10 is 1, and the value of the DAI included in the PDCCH for scheduling the PDSCH in the downlink time slot 11 is 2, and the terminal device misses the downlink time slot 11 at this time. The PDCCH, the terminal device detects only one scheduled PDSCH, and satisfies the first condition that the number of downlink control information is 1 (for example, when the first preset value is 1). The second preset value included in the downlink time slot 10 also satisfies the second condition being 1, and the terminal device sends the ACK/NACK corresponding to the PDSCH in the downlink time slot 10 to the base station. At this time, the base station can know that the downlink information slot 10 is sent according to the DAI value of different downlink time slots. This application does not limit this.

It should be understood that the PDCCH for scheduling the PDSCH includes the DAI value, so both the terminal device and the base station can determine the DAI value corresponding to any one of the downlink time slots.

If the second condition is not used, the base station cannot determine whether the terminal device misses the PDCCH corresponding to the downlink time slot 10 or the downlink time slot 11, and the base station and the terminal device have inconsistent understanding of the downlink time slot corresponding to the backoff codebook.

The value of the second preset value may be 1 and also considers the case where the DAI bit is limited. For example, a 2-bit DAI, the specific state can be {00, 01, 10, 11}.

At this point, you can identify 4 values that are not repeated, such as {1, 2, 3, 4}. However, considering that the probability of continuously detecting 4 PDCCHs is extremely low, more values can be represented by DAI loops, for example, represented by {00, 01, 10, 11, 00, 01, 10, 11, ...} The values are {1, 2, 3, 4, 1, 2, 3, 4, ...}.

It should be understood that, in the embodiment of the present application, the correspondence between other states and values is not limited. For example, the value of the identifier may be {0, 1, 2, 3, 0, 1, 2, 3, ...}, that is, it may be identified from 0.

It should be noted that, taking FIG. 6 as an example, it is assumed that the downlink time slot {1, 2, 3, 4, 5, 6, 7, 8} can be represented by a DAI cycle as {1, 2, 3, 4, 1, 2,3,4}.

If the base station dynamically schedules 5 downlink time slots {1, 2, 3, 4, 5}, the terminal device misses the downlink time slot {1, 2, 3, 4}, and only the downlink time slot 5 is detected. The PDCCH of the dynamically scheduled PDSCH satisfies the first preset value of 1. If the value of the second preset value is 1, the DAI value in the PDCCH in the dynamically scheduled downlink 5 also satisfies the value of the second preset value. At this time, the PDSCH of the downlink time slot 5 satisfies the first preset value and the second preset value at the same time, and the terminal sends the feedback information of the dynamically scheduled PDSCH on the downlink time slot 5 to the base station.

At this time, the base station is unable to learn the downlink time slot of the terminal device missed detection. Therefore, when the base station receives the feedback information, it cannot determine whether it is the feedback information of the dynamically scheduled PDSCH on the downlink time slot 2 or the downlink time slot 6. Therefore, there may be a problem that the base station and the terminal device do not understand which downlink time slot is corresponding to the back-off codebook. However, in the embodiment of the present application, since the probability of continuously detecting 4 PDCCHs is extremely low, there is no problem that the base station and the terminal device understand that the downlink time slot terminal device and the base station are inconsistent with respect to the back-off codebook.

Optionally, the preset condition further includes a fourth condition, where the first condition is that the first downlink information is carried in a primary frequency domain unit or a primary secondary frequency domain unit in the at least one frequency domain unit.

In the embodiment of the present application, the terminal device may be configured with multiple carriers, and the codebook fallback may be determined based on whether one PDSCH is scheduled, and the one PDSCH may be selected on a predetermined carrier.

For example, the primary carrier or primary bandwidth portion or primary secondary carrier or primary attached bandwidth portion.

Taking the carrier as an example, the primary secondary carrier may be the primary carrier in the secondary carrier group in the dual connectivity mode, or the primary secondary carrier may be the secondary carrier carrying the PUCCH.

Optionally, the foregoing backoff codebook may also be applied to the case where the SPS PDSCH is present.

For example, if the downlink time slot subset can receive only one dynamically scheduled PDSCH and one SPS PDSCH, the terminal device can still use the backoff codebook for ACK/NACK feedback, and the backoff codebook can include only one dynamic PDSCH corresponding. 1 ACK/NACK bit and 1 ACK/NACK bit corresponding to one SPS PDSCH.

In the LTE system, only a special feedback mode of channel selection can be used for receiving a dynamically scheduled PDSCH and an SPS PDSCH, and the 5G system can use a backoff codebook for this case.

Because the PDCCH of the dynamically scheduled PDSCH may have indication information of the ACK/NACK resource, for example, a pre-configured DAI. And the indicated ACK/NACK corresponding to the dynamic PDSCH and the SPS PDSCH may be carried on the indicated PUCCH resource.

FIG. 7 is a schematic diagram of a feedback information fallback mode according to an embodiment of the present application.

It should be understood that FIG. 7 is a description of an embodiment using a single carrier as an example, and an embodiment of the present application may be extended to a case of multiple carriers.

In the embodiment of the present application, for example, the downlink time slot set corresponding to the uplink time slot i includes time slots 1 to 8, wherein the base station actually only schedules the PDSCH to the terminal device in the downlink time slot 1; The downlink time slot set includes downlink time slots 4 to 11, wherein the base station actually schedules the PDSCH to the terminal device only in the downlink time slot 10.

The terminal device needs to feed back ACK/NACK information to the base station in the uplink slot i and the uplink slot j, respectively. The first association relationship between the uplink time slot i and the downlink time slots 1 to 8 is present, and the first association relationship exists between the uplink time slot j and the downlink time slots 4 to 11. The specific first association relationship may be as shown in FIG. Show. This application does not limit this.

As described in FIG. 6, the downlink time slot subset corresponding to the uplink time slot i may include time slots 1 to 8, and the downlink time slot subset corresponding to the uplink time slot j may include the downlink time slots 10 and 11.

It can be seen that the downlink time slot subset corresponding to the uplink time slot i is a subset of the downlink time slot set corresponding to the uplink time slot i, and the downlink time slot subset corresponding to the uplink time slot j is the downlink time corresponding to the uplink time slot j. A subset of the gap set.

Specifically, the second association relationship exists between the uplink time slot i and the downlink time slots 1 to 8. The specific first association relationship may be as shown in FIG. 3 . This application does not limit this.

Optionally, in the embodiment of the present application, the preset condition further includes a third condition, where the third condition is that the first time unit where the first downlink information is located is the time unit. The first time unit of a particular time domain location in the collection.

According to the third condition, the downlink control channel is not required to be restricted as in the embodiment shown in FIG. 6, because the DAI value can be independent at this time.

That is, the downlink control channel that dynamically schedules the first downlink information may be a downlink control channel used for backoff scheduling, or may be a downlink control channel used for non-backoff scheduling.

The first time unit of a particular time domain location may be understood to be that once the time unit set is determined, the particular time domain location is an absolute time domain location in the set of time units.

For example, it may be preset as the earliest time unit or the latest time unit in the set of time units. This application does not limit this.

For example, the ACK/NACK of the above-mentioned time slot i feedback is described as an example:

It is assumed that the first preset value of the first condition included in the preset condition is 1, that is, when the number of the first downlink information is 1 is performed, the codebook is backed off.

If the terminal device receives the dynamically scheduled PDSCH in the downlink time slot subset corresponding to the uplink time slot i, the number of the dynamically scheduled PDSCH is a first preset value, for example, the first preset value is 1, and the dynamically scheduled PDSCH is in the downlink. The time slot 1 is a preset time domain position in the downlink time slot set (for example, the third time condition is that the first time unit of the specific time domain position is the earliest downlink time slot). The ACK/NACK codebook may include only the ACK/NACK corresponding to the PDSCH in the downlink slot 1 and the ACK/NACK corresponding to the other downlink slots in the downlink slot set corresponding to the uplink slot i.

If the number of the dynamically scheduled PDSCHs received by the terminal device in the downlink time slot subset corresponding to the time slot i is a first preset value, for example, the first preset value is 1, the downlink time slot where the dynamically scheduled PDSCH is located 1 is not the preset time domain position in the downlink time slot set, that is, when the third condition in the preset condition is not met, the ACK/NACK codebook includes ACK/NACK corresponding to all PDSCHs in the downlink time slot 1 to the downlink time slot 8.

For example, the above line slot j feedback ACK/NACK is taken as an example for description:

It is assumed that the first preset value of the first condition included in the preset condition is 1, that is, when the number of the first downlink information is 1 is performed, the codebook is backed off.

If the terminal device receives the dynamically scheduled PDSCH in the downlink slot subset corresponding to the uplink slot j as the first preset value bit 1. For example, the PDSCH that is dynamically scheduled in the downlink time slot 10 is received, but the downlink time slot 10 where the dynamically scheduled PDSCH is located is not the preset time domain position in the downlink time slot set (for example, the third condition is a specific time domain). The first time unit of the location is the earliest downlink time slot 4). At this time, the ACK/NACK codebook is a normal semi-static codebook, that is, it is required to include ACK/NACK corresponding to all downlink time slots 4 to 11 in the downlink slot set.

Optionally, the preset condition further includes a fourth condition, where the first condition is that the first downlink information is carried in a primary frequency domain unit or a primary secondary frequency domain unit in the at least one frequency domain unit.

In the embodiment of the present application, the terminal device may be configured with multiple carriers, and the codebook fallback may be determined based on whether one PDSCH is scheduled, and the one PDSCH may be selected on a predetermined carrier.

For example, the primary carrier or primary bandwidth portion or primary secondary carrier or primary attached bandwidth portion.

Taking the carrier as an example, the primary secondary carrier may be the primary carrier in the secondary carrier group in the dual connectivity mode, or the primary secondary carrier may be the secondary carrier carrying the PUCCH.

Optionally, in the embodiment of the present application, the preset condition may further include the second condition and the third condition. That is, the value of the indication information in the downlink control channel that is configured to dynamically schedule the first downlink information is a second preset value, and the first time unit in which the first downlink information is located is the time unit set. The first time unit in a particular time domain location. At this time, according to the second preset value and the first time unit of the specific time domain position, the consistency of the terminal device and the base station for understanding the downlink time slot is improved when the codebook is rolled back.

For example, it is assumed that the first preset value of the first condition included in the preset condition is 1, the second condition is that the second preset value is 1, and the third condition is that the first time unit of the specific time domain position is the earliest downlink. Time slot (eg, downlink time slot 4).

The above line slot j feedback ACK/NACK is taken as an example for description:

If the terminal equipment receives the dynamically scheduled PDSCH in the downlink time slot 10 in the downlink time slot subset corresponding to the time slot j, the PDCCH of the dynamically scheduled PDSCH in the downlink time slot 11 is missed. The value of the DAI in the PDCCH of the downlink time slot 10 is 1, and the value of the DAI in the PDCCH of the downlink time slot 11 is 2. Since the terminal misses the PDCCH of the downlink time slot 11, the PDCCH of the downlink time slot 11 cannot be received. The value of DAI in the middle is 2. At this time, the PDSCH scheduled in the downlink time slot 10 satisfies the first condition and the second condition, but the first time unit that does not satisfy the third condition in the time domain position is the earliest downlink time slot, and therefore, the ACK/NACK codebook It is a normal semi-static codebook, that is, it needs to include ACK/NACK corresponding to all downlink time slots 4 to 11 in the downlink time slot set.

Optionally, the foregoing backoff codebook may also be applied to the case where the SPS PDSCH is present.

For example, if the downlink time slot subset can receive only one dynamically scheduled PDSCH and one SPS PDSCH, the terminal device can still use the backoff codebook for ACK/NACK feedback, and the backoff codebook can include only one dynamic PDSCH corresponding. 1 ACK/NACK bit and 1 ACK/NACK bit corresponding to one SPS PDSCH.

In the LTE system, only a special feedback mode of channel selection can be used for receiving a dynamically scheduled PDSCH and an SPS PDSCH, and the 5G system can use a backoff codebook for this case.

Because the PDCCH of the dynamically scheduled PDSCH may have indication information of the ACK/NACK resource, for example, a pre-configured DAI. And the indicated ACK/NACK corresponding to the dynamic PDSCH and the SPS PDSCH may be carried on the indicated PUCCH resource.

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application. The implementation process constitutes any limitation.

The method for transmitting feedback information according to the embodiment of the present application is described in detail. In the present application, based on the semi-static codebook mode, the terminal device corresponds to at least one time unit for transmitting feedback information, specifically, the first association relationship. When a plurality of downlink information is scheduled in a plurality of time units in the time unit set, when the number of downlink information corresponding to the second association relationship satisfies the first condition, the codebook can be rolled back, thereby improving The resource utilization efficiency of the system for the uplink control channel carrying the feedback information. It should be understood that the terminal device and the network device in the embodiments of the present application may perform various methods in the foregoing embodiments of the present application, that is, the specific working processes of the following various products, and may refer to the corresponding processes in the foregoing method embodiments.

FIG. 8 shows a schematic structural diagram of a communication device 700 according to an embodiment of the present application. The communication device 700 may be a terminal device applied to the system shown in FIG. 1. As shown in FIG. 8, the communication device 700 includes a transceiver unit 710 and a processing unit 720.

The transceiver unit 710 and the processing unit 720 communicate with each other through an internal connection path to transfer control and/or data signals. In one possible design, the transceiver unit 710 and the processing unit 720 can be implemented by a chip to implement the corresponding functions of the terminal device in the embodiment of the present application.

In the embodiment of the present application, the transceiver unit 710 is configured to:

At least one downlink information is received in at least one first time unit of the set of time units, the set of time units being a set of at least one first time unit on at least one frequency domain unit in which the terminal device is configured.

The processing unit 720 is configured to:

Determining a second time unit, wherein the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship; a codebook, where the first codebook includes feedback information corresponding to the first downlink information, where the first codebook does not include the first downlink information in the time unit subset And the specific time unit is at least one first time unit of the time unit set except the first time unit where the first downlink information is located, where The preset condition includes a first condition, where the number of the first downlink information satisfies a first preset value, and the subset of time units is a subset of the set of time units, The subset of time units has a second association with the second unit of time.

The transceiver unit 710 is configured to:

And transmitting uplink control information in the second time unit, where the uplink control information carries the first codebook.

Optionally, the processing unit 720 is further configured to:

A semi-static codebook mode is determined from a plurality of candidate codebook modes, the semi-static codebook mode and a dynamic codebook mode.

Optionally, the preset condition further includes a second condition, where the second condition is that the value of the indication information in the downlink control channel that dynamically schedules the first downlink information is a second preset value.

Optionally, the preset condition further includes a third condition, where the first time unit where the first downlink information is located is a first time unit of a specific time domain position in the time unit set. .

Optionally, the preset condition further includes a fourth condition, where the first downlink information is carried in a primary frequency domain unit or a primary secondary frequency domain unit in the at least one frequency domain unit.

Optionally, in the embodiment of the present application, the preset condition may further include the second condition and the third condition. That is, the value of the indication information in the downlink control channel that is configured to dynamically schedule the first downlink information is a second preset value, and the first time unit in which the first downlink information is located is the time unit set. The first time unit in a particular time domain location. At this time, according to the second preset value and the first time unit of the specific time domain position, the consistency of the terminal device and the base station for understanding the downlink time slot is improved when the codebook is rolled back.

It should be understood that, in the embodiment of the present application, the preset condition includes the first condition, and may further include any one or more of the second condition, the third condition, and the fourth condition. For example, the preset condition includes a second condition and a third condition in addition to the first condition. The preset condition includes a second condition and a fourth condition in addition to the first condition. This application does not limit this.

Optionally, when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes all first time units in the set of time units. Feedback information.

Optionally, the value of the indication information is set according to a preset rule related to the subset of the time unit.

Optionally, in the at least one first time unit on each of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in a sequence of time units; or

For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.

For example, the preset rule may be that the value of the indication information of the at least one time unit of the time unit subset of the first frequency domain unit may be counted as {1, 2, 3, 4, 1, 2, 3, 4, .. .}. The value of the indication information of the at least one time unit of the subset of time units of the second frequency domain unit may be counted as {1, 2, 3, 4, 1, 2, 3, 4, ...}, Not limited. It should be noted that the number of bits in the DAI field is generally 2, and only there are 4 states of '00' '01''10''11', and the corresponding values may be 1, 2, 3, and 4, respectively. They are 0, 1, 2 and 3. For example, taking the values 1, 2, 3, and 4 as an example. If it exceeds 4, it can be counted cyclically. For example, the above counts {1, 2, 3, 4, 1, 2, 3, 4, ...} actually The count is {1, 2, 3, 4, 5, 6, 7, 8, ...}.

For another example, the preset rule may be that the time unit 1 in the frequency domain unit 1 is identified as 1, the time unit 1 in the frequency domain unit 2 is identified as 2, the time unit identifier in the frequency domain unit 3 is 3, and so on. Indicates that the time unit 2 in the frequency domain unit 1 is identified as 4, the time unit 2 in the frequency domain unit 2 is identified as 5, and the time unit 2 in the frequency domain unit 3 is identified as 6, etc., that is, the preset rule is the first frequency. The order of the time domain after the domain is counted cumulatively.

Optionally, the at least one downlink information further includes second downlink information, where the downlink control channel for scheduling the second downlink information is a semi-persistently scheduled downlink control channel, and the first codebook further includes the second downlink information. Feedback information corresponding to the downlink information.

Optionally, the first association relationship is predefined to the standard and/or the network device is configured to the terminal device by using radio resource control RRC signaling.

Optionally, the second association relationship is determined according to the dynamically scheduled downlink control channel.

Optionally, the time unit may be at least one of a time slot, a micro time slot, and a subframe.

Optionally, the frequency domain unit may be a carrier or a carrier bandwidth part (BWP).

Optionally, the second time unit may be an uplink time unit or a flexible time unit.

Optionally, the first association relationship may be pre-configured or notified to the terminal device by using RRC dedicated signaling. In general, for the backoff PDCCH scheduling, the first association relationship may be pre-configured. For the non-backward PDCCH scheduling, the first association relationship may be notified to the terminal device by using RRC dedicated signaling.

Optionally, in the embodiment of the present application, the downlink control channel may be a control channel used for backoff scheduling.

Optionally, the indication information included in the downlink control channel that dynamically schedules the first downlink information may be a DAI field, and the preset value is preferably a value represented by DAI=1 or a DAI field of “00”.

Optionally, in the embodiment of the present application, the at least one downlink information may further include second downlink information, where the downlink control channel that schedules the second downlink information is a semi-persistently scheduled downlink control channel, where the The codebook further includes feedback information corresponding to the second downlink information.

Optionally, in the embodiment of the present application, before the terminal device determines the first codebook, the terminal device determines a semi-static codebook mode from multiple candidate codebook modes, where the multiple candidate codebook modes are Includes semi-static codebook mode and dynamic codebook mode.

Optionally, in the embodiment of the present application, before the terminal device sends the feedback information in the second time unit according to the first codebook, the terminal device determines a target resource set of an uplink control channel. Determining, in the target resource set, a target resource of the uplink control channel, where the terminal device sends uplink control information on the target resource in the second time unit, where the uplink control information carries the first codebook .

For example, in a case where the number of the first downlink information in the at least one downlink information is the first preset value (for example, the first preset value is 1) or the other conditions are met, that is, the current time A codebook is a back-off codebook, and the target resource set is a first resource set, and the codebook size of the first resource set corresponding to the first codebook is less than or equal to 2.

That is, when the number of the first downlink information, that is, the first condition that the number of PDSCHs meets the preset condition, for example, the first preset value is 1, that is, the terminal device detects a scheduled PDSCH. At the time of the PDCCH, the terminal device can perform codebook fallback. At this time, the terminal device sends the first codebook of the feedback information by using the first target resource in the first resource set.

Optionally, in the embodiment of the present application, in a case where the number of the first downlink information in the at least one downlink information is not the first preset value, the target resource set is a second resource set, where The codebook size corresponding to the first codebook of the second resource set is greater than 2, that is, the non-return codebook or the normal semi-static codebook. At this time, the terminal device sends the first codebook of the feedback information through the second target resource in the second resource set.

It should be understood that, in the embodiment of the present application, the first downlink information may also be dynamically scheduled downlink information.

For example, a downlink semi-persistent scheduling SPS release indication or a dynamically scheduled downlink data channel may be included. The dynamically scheduled downlink data channel can be scheduled by a dynamic downlink control channel.

It should be noted that dynamic scheduling means that each downlink data channel transmission requires a corresponding downlink control channel for scheduling.

The dynamically scheduled downlink data channel corresponds to a semi-persistently scheduled downlink data channel, which is scheduled by a semi-persistent downlink control channel. That is, after the semi-persistent downlink control channel is transmitted once, the corresponding semi-persistent downlink data channel can be transmitted according to the pre-configured transmission period without having to transmit a semi-continuous downlink control channel every time.

The semi-persistent downlink scheduling may be released by using a specific downlink control channel, and the downlink control channel used to implement the release indication of the downlink semi-persistent scheduling is generally not used for scheduling the downlink data channel, but the terminal device also needs to feed back an ACK/NACK. Feedback.

It should be understood that the embodiment of the present application may also describe the downlink information by using a dynamically scheduled downlink data channel as an example. This application does not limit this.

Optionally, in the embodiment of the present application, in the dynamic codebook mode, the terminal device may determine a second codebook of the feedback information, where the second codebook includes the first time unit that is actually scheduled in the time unit set. Corresponding feedback information.

It should be understood that although not shown, the communication device 700 may also include other units, such as an input unit, an output unit, and the like.

FIG. 9 is a structural block diagram of a communication device 800 according to an embodiment of the present application. Communication device 800 can be a network device that is employed in the system shown in FIG. The communication device 800 shown in FIG. 9 includes a transceiving unit 810 and a processing unit 820.

The transceiver unit 810 and the processing unit 820 communicate with each other through an internal connection path to transfer control and/or data signals. In one possible design, the transceiver unit 810 and the processing unit 820 can be implemented by a chip to implement the corresponding functions of the network device in the embodiment of the present application.

In the embodiment of the present application, the transceiver unit 810 is configured to:

Transmitting at least one downlink information to the terminal device in at least one first time unit of the set of time units, the set of time units being a set of at least one first time unit on the at least one frequency domain unit to which the terminal device is configured.

The processing unit 820 is configured to:

And determining, by the second time unit, the feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship.

The transceiver unit 810 is configured to:

Receiving the uplink control information sent by the terminal device in the second time unit, where the uplink control information carries the first codebook, where the first codebook is the first downlink information in the time unit subset meets the pre- The first codebook includes the feedback information corresponding to the first downlink information, and the first codebook does not include the feedback information corresponding to the specific time unit in the time unit subset. The specific time unit is at least one first time unit of the time unit set except the first time unit where the first downlink information is located, and the preset condition includes a first condition, the first The condition is that the number of the first downlink information satisfies a first preset value, the subset of the time unit is a subset of the set of time units, and the subset of the time unit and the second time unit have a second connection relation.

Optionally, the processing unit 820 is further configured to:

Determining a semi-static codebook mode from a plurality of candidate codebook modes, the plurality of candidate codebook modes including a semi-static codebook mode and a dynamic codebook mode;

The transceiver unit 810 is further configured to:

And configuring the semi-static codebook mode to the terminal device by using signaling.

Optionally, the preset condition further includes a second condition, where the second condition is that the value of the indication information in the downlink control channel that dynamically schedules the first downlink information is a second preset value.

Optionally, the preset condition further includes a third condition, where the first time unit where the first downlink information is located is a first time unit of a specific time domain position in the time unit set. .

Optionally, the preset condition further includes a fourth condition, where the first downlink information is carried in a primary frequency domain unit or a primary secondary frequency domain unit in the at least one frequency domain unit.

Optionally, in the embodiment of the present application, the preset condition may further include the second condition and the third condition. That is, the value of the indication information in the downlink control channel that is configured to dynamically schedule the first downlink information is a second preset value, and the first time unit in which the first downlink information is located is the time unit set. The first time unit in a particular time domain location. At this time, according to the second preset value and the first time unit of the specific time domain position, the consistency of the terminal device and the base station for understanding the downlink time slot is improved when the codebook is rolled back.

It should be understood that, in the embodiment of the present application, the preset condition includes the first condition, and may further include any one or more of the second condition, the third condition, and the fourth condition. For example, the preset condition includes a second condition and a third condition in addition to the first condition. The preset condition includes a second condition and a fourth condition in addition to the first condition. This application does not limit this.

Optionally, when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes all first time units in the set of time units. Feedback information.

Optionally, the value of the indication information is set according to a preset rule related to the subset of the time unit.

Optionally, in the at least one first time unit on each of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in a sequence of time units; or

For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.

For example, the preset rule may be that the value of the indication information of the at least one time unit of the time unit subset of the first frequency domain unit may be counted as {1, 2, 3, 4, 1, 2, 3, 4, .. .}. The value of the indication information of the at least one time unit of the subset of time units of the second frequency domain unit may be counted as {1, 2, 3, 4, 1, 2, 3, 4, ...}, Not limited. It should be noted that the number of bits in the DAI field is generally 2, and only there are 4 states of '00' '01''10''11', and the corresponding values may be 1, 2, 3, and 4, respectively. They are 0, 1, 2 and 3. For example, taking the values 1, 2, 3, and 4 as an example. If it exceeds 4, it can be counted cyclically. For example, the above counts {1, 2, 3, 4, 1, 2, 3, 4, ...} actually The count is {1, 2, 3, 4, 5, 6, 7, 8, ...}.

For another example, the preset rule may be that the time unit 1 in the frequency domain unit 1 is identified as 1, the time unit 1 in the frequency domain unit 2 is identified as 2, the time unit identifier in the frequency domain unit 3 is 3, and so on. Indicates that the time unit 2 in the frequency domain unit 1 is identified as 4, the time unit 2 in the frequency domain unit 2 is identified as 5, and the time unit 2 in the frequency domain unit 3 is identified as 6, etc., that is, the preset rule is the first frequency. The order of the time domain after the domain is counted cumulatively.

Optionally, the at least one downlink information further includes second downlink information, where the downlink control channel for scheduling the second downlink information is a semi-persistently scheduled downlink control channel, and the first codebook further includes the second downlink information. Feedback information corresponding to the downlink information.

Optionally, the first association relationship is predefined to the standard and/or the network device is configured to the terminal device by using radio resource control RRC signaling.

Optionally, the second association relationship is indicated by a downlink control channel that dynamically schedules the first downlink information.

Optionally, the time unit may be at least one of a time slot, a micro time slot, and a subframe.

Optionally, the frequency domain unit may be a carrier or a carrier bandwidth part (BWP).

Optionally, the second time unit may be an uplink time unit or a flexible time unit.

Optionally, the first association relationship may be pre-configured or notified to the terminal device by using RRC dedicated signaling. In general, for the backoff PDCCH scheduling, the first association relationship may be pre-configured. For the non-backward PDCCH scheduling, the first association relationship may be notified to the terminal device by using RRC dedicated signaling.

Optionally, in the embodiment of the present application, the downlink control channel may be a control channel used for backoff scheduling.

Optionally, the indication information included in the downlink control channel that dynamically schedules the first downlink information may be a DAI field, and the preset value is preferably a value represented by DAI=1 or a DAI field of “00”.

Optionally, in the embodiment of the present application, the at least one downlink information may further include second downlink information, where the downlink control channel that schedules the second downlink information is a semi-persistently scheduled downlink control channel, where the The codebook further includes feedback information corresponding to the second downlink information.

It should be understood that, in the embodiment of the present application, the first downlink information may also be dynamically scheduled downlink information.

For example, a downlink semi-persistent scheduling SPS release indication or a dynamically scheduled downlink data channel may be included. The dynamically scheduled downlink data channel can be scheduled by a dynamic downlink control channel.

It should be noted that dynamic scheduling means that each downlink data channel transmission requires a corresponding downlink control channel for scheduling.

Corresponding to the dynamically scheduled downlink data channel is a semi-persistently scheduled downlink data channel, which is scheduled by a semi-persistent downlink control channel. That is, after the semi-persistent downlink control channel is transmitted once, the corresponding semi-persistent downlink data channel can be transmitted according to the pre-configured transmission period without having to transmit a semi-continuous downlink control channel every time.

The semi-persistent downlink scheduling may be released by using a specific downlink control channel, and the downlink control channel used to implement the release indication of the downlink semi-persistent scheduling is generally not used for scheduling the downlink data channel, but the terminal device also needs to feed back an ACK/NACK. Feedback.

It should be understood that the embodiment of the present application may also describe the downlink information by using a dynamically scheduled downlink data channel as an example. This application does not limit this.

Optionally, in the embodiment of the present application, in the dynamic codebook mode, the terminal device may determine a second codebook of the feedback information, where the second codebook includes the first time unit that is actually scheduled in the time unit set. Corresponding feedback information.

It should be understood that although not shown, the communication device 800 may also include other units, such as an input unit, an output unit, and the like.

FIG. 10 shows a schematic block diagram of a communication device 900 of another embodiment of the present application. As shown in FIG. 10, the communication device 900 can be a terminal device, or can be a chip or a circuit, such as a chip or a circuit that can be disposed on the terminal device. The terminal device may correspond to the terminal device in the foregoing method.

The communication device 900 can include a processor 11 (ie, can be the processing unit 720 described above) and a memory 12. The memory 12 is for storing instructions for executing the instructions stored by the memory 12 to cause the communication device 900 to implement the steps performed by the terminal device in the corresponding method of FIG.

Further, the communication device 900 may further include an input port 13 (ie, may be the above-mentioned transceiver unit 710) and an output port 14 (ie, may be the above-described transceiver unit 710). Further, the processor 11, memory 12, input port 13 and output port 14 can communicate with one another via internal connection paths to communicate control and/or data signals. The memory 12 is for storing a computer program that can be used to call and run the computer program from the memory 12. The memory 12 can be integrated in the processor 11 or can be provided separately from the processor 11.

Optionally, if the communication device 900 is a terminal device, the input port 13 is a receiver, and the output port 14 is a transmitter. The receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the communication device 900 is a chip or a circuit, the input port 13 is an input interface, and the output port 14 is an output interface.

As an implementation manner, the functions of the input port 13 and the output port 14 can be implemented by a dedicated chip through a transceiver circuit or a transceiver. The processor 11 can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.

As another implementation manner, the terminal device provided by the embodiment of the present application may be implemented by using a general-purpose computer. The program code that implements the functions of the processor 11, the input port 13, and the output port 14 is stored in the memory 12, and the general purpose processor implements the functions of the processor 11, the input port 13, and the output port 14 by executing the code in the memory 12.

The processor is mainly used for processing the communication protocol and the communication data, and controlling the entire terminal device, executing the software program, and processing the data of the software program, for example, the first downlink information used in the subset of time units meets the preset condition. At the time, the codebook is backed off for the first codebook. The memory is primarily used to store software programs and data, for example, to store the first codebook described in the above embodiments.

Those skilled in the art will appreciate that FIG. 10 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like.

As an optional implementation manner, the processor may include a baseband processor and a central processing unit, and the baseband processor is mainly used to process the communication protocol and the communication data, and the central processing unit is mainly used to control and execute the entire terminal device. A software program that processes data from a software program.

The processor in FIG. 10 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus.

Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network standards, and the terminal device may include a plurality of central processors to enhance its processing capabilities, and various components of the terminal devices may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The functions of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.

Exemplarily, in the embodiment of the present application, an antenna and a control circuit having a transceiving function can be regarded as a transceiving unit 710 of the communication device 700, and a processor having a processing function can be regarded as a processing unit 720 of the communication device 700. As shown in FIG. 8, the terminal device 700 includes a transceiver unit 710 and a processing unit 720. The transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver communication device, and the like. Optionally, the device for implementing the receiving function in the transceiver unit 710 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 710 can also be regarded as a sending unit, that is, the transceiver unit 710 includes the receiving unit and the sending unit. unit. Illustratively, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.

FIG. 11 shows a schematic block diagram of a communication device 1000 of another embodiment of the present application. As shown in FIG. 11, the communication device 1000 can be a network device, or can be a chip or a circuit, such as a chip or a circuit that can be disposed in a network device. The network device corresponds to the network device in the foregoing method.

The communication device 1000 can include a processor 31 (ie, can be the processing unit 820 described above) and a memory 32. The memory 32 is for storing instructions for executing the instructions stored by the memory 32 to cause the communication device 1000 to implement the steps performed by the network device in the aforementioned method of FIG.

Further, the communication device 1000 may further include an input port 33 (ie, may be the above-mentioned transceiver unit 810) and an output port 33 (ie, may be the above-described transceiver unit 810). Still further, the processor 31, memory 32, input port 33, and output port 34 can communicate with one another via internal connection paths to communicate control and/or data signals. The memory 32 is used to store a computer program, and the processor 31 can be used to call and run the computer program from the memory 32 to control the input port 33 to receive signals, and control the output port 34 to send signals to complete the above method. The steps of the device. The memory 32 can be integrated in the processor 31 or can be provided separately from the processor 31.

The control input port 33 receives the signal, and the control output port 34 transmits a signal to complete the steps of the network device in the above method. The memory 32 can be integrated in the processor 31 or can be provided separately from the processor 31.

Optionally, if the communication device 1000 is a network device, the input port 33 is a receiver, and the output port 34 is a transmitter. The receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the communication device 1000 is a chip or a circuit, the input port 33 is an input interface, and the output port 34 is an output interface.

Optionally, if the communication device 1000 is a chip or a circuit, the communication device 1000 may not include the memory 32, and the processor 31 may read an instruction (program or code) in the memory external to the chip to implement the foregoing. The function of the network device in the corresponding method in FIG.

As an implementation, the functions of the input port 33 and the output port 34 can be implemented by a dedicated chip through a transceiver circuit or a transceiver. The processor 31 can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.

As another implementation manner, a network device provided by an embodiment of the present application may be implemented by using a general-purpose computer. The program code that implements the functions of the processor 31, the input port 33, and the output port 34 is stored in a memory, and the general purpose processor implements the functions of the processor 31, the input port 33, and the output port 34 by executing code in the memory.

In the embodiment of the present application, FIG. 11 may be a schematic structural diagram of a network device. It can be used to implement the functions of the network device in the above method. The processor 31 can perform the functions of the processing unit 820 in the communication device 800, and the input port 33 and the output port 34 can perform the functions of the transceiver unit 810 in the communication device 800. This application does not limit this.

The method of transmitting feedback information in the above embodiment of the present application may be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or the like. Programming logic device, discrete gate or transistor logic device, discrete hardware component, system chip (SoC), central processor unit (CPU), or network processor (Network) Processor, NP), can also be a digital signal processing circuit (DSP), can also be a microcontroller (Micro Controller Unit (MCU), can also be a programmable controller (Programmable Logic Device (PLD) or other Integrated chip. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc. In the storage medium. The storage medium is located in the memory, and the processor reads the instructions in the memory and combines the hardware to complete the steps of the above method.

It can be understood that when the embodiment of the present application is applied to a network device chip, the network device chip implements the functions of the network device in the foregoing method embodiment. The network device chip receives the uplink shared channel and uplink data to other modules in the network device, such as a radio frequency module or an antenna. The uplink shared channel and the downlink data are sent by the terminal device to the base station.

When the embodiment of the present application is applied to a terminal device chip, the terminal device chip implements the function of the terminal device in the foregoing method embodiment. The terminal device chip sends the uplink control information from other modules in the terminal device, such as a radio frequency module or an antenna, where the uplink control information carries the first codebook.

The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable communication device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains one or more sets of available media. The usable medium can be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium. The semiconductor medium can be a solid state hard drive.

It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application. The implementation process constitutes any limitation.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the system, the communication device and the unit described above can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, communication device and method may be implemented in other manners. For example, the communication device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, communication device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims (60)

1. A method for transmitting feedback information, comprising:

   Receiving, by the terminal device, at least one downlink information in at least one first time unit of the set of time units, the set of time units being a set of at least one first time unit on at least one frequency domain unit configured by the terminal device;

   Determining, by the terminal device, a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship;

   Determining, by the terminal device, a first codebook, where the first codebook includes feedback information corresponding to the first downlink information, where the first downlink information in the time unit subset meets a preset condition, The first codebook does not include feedback information corresponding to the specific time unit in the time unit set, where the specific time unit is at least the first time unit of the time unit set except the first downlink information. a first time unit, the preset condition includes a first condition, where the first condition is that the number of the first downlink information meets a first preset value, and the time unit subset is the time unit set a subset of the time unit and the second time unit have a second association relationship;

   The terminal device sends uplink control information in the second time unit, where the uplink control information carries the first codebook.
2. The method according to claim 1, wherein the preset condition further includes a second condition, where the second condition is a value for dynamically indicating the indication information in the downlink control channel of the first downlink information. Is the second preset value.
3. The method according to claim 1, wherein the preset condition further comprises a third condition, wherein the third condition is that the first time unit in which the first downlink information is located is in the time unit set The first time unit of a particular time domain location.
4. The method according to any one of claims 1 to 3, wherein the preset condition further comprises a fourth condition, wherein the fourth condition is that the first downlink information is carried in the at least one frequency The primary frequency domain unit or the primary secondary frequency domain unit in the domain unit.
5. The method according to claim 1, wherein when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes the time unit Feedback information corresponding to all first time units in the set.
6. The method according to claim 2, wherein the value of the indication information is set according to a preset rule associated with the subset of time units.
7. The method according to claim 6, wherein for at least one first time unit on each of the at least one frequency domain unit in the subset of time units, the preset rule is time Cumulative counting of the unit's front and back order; or

   For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.
8. The method according to any one of claims 1 to 7, wherein the at least one downlink information further includes second downlink information, and the downlink control channel for scheduling the second downlink information is a downlink of semi-persistent scheduling. And a control channel, where the first codebook further includes feedback information corresponding to the second downlink information.
9. The method according to any one of claims 1 to 8, wherein the first association relationship is predefined to a standard and/or a network device is configured to the terminal device by radio resource control RRC signaling. .
10. The method according to any one of claims 1 to 8, wherein the second association relationship is determined according to a downlink control channel for dynamically scheduling the first downlink information.
11. The method according to any one of claims 1 to 10, wherein before the determining, by the terminal device, the first codebook, the method further comprises:

    The terminal device determines a semi-static codebook mode from a plurality of candidate codebook modes, where the plurality of candidate codebook modes include a semi-static codebook mode and a dynamic codebook mode.
12. The method according to any one of claims 1 to 11, wherein the first preset value is greater than or equal to 1, wherein when the first preset value is greater than 1, the first pre-predetermined The first downlink information is set to carry the same transport block information.
13. The method according to claim 12, wherein the first preset value of the first downlink information is scheduled by the same downlink control channel.
14. The method according to claim 12, wherein the first preset value is less than or equal to a third preset value, and the third preset value is determined according to a downlink set parameter configured by the high layer signaling.
15. A method for transmitting feedback information, comprising:

    The network device transmits at least one downlink information to the terminal device in at least one first time unit of the set of time units, the set of time units being at least one first time unit on the at least one frequency domain unit configured by the terminal device set;

    Determining, by the network device, a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship;

    The network device receives the uplink control information sent by the terminal device in the second time unit, where the uplink control information carries a first codebook, where the first codebook is the first time in the time unit subset a first codebook that meets a preset condition, where the first codebook includes feedback information corresponding to the first downlink information, where the first codebook does not include a specific time unit corresponding to the time unit set. And the specific time unit is at least one first time unit of the time unit set except the first time unit where the first downlink information is located, where the preset condition includes a first condition, The first condition is that the number of the first downlink information meets a first preset value, the subset of time units is a subset of the set of time units, the subset of time units and the second time The unit has a second association.
16. The method according to claim 15, wherein the preset condition further includes a second condition, where the second condition is a value for dynamically indicating the indication information in the downlink control channel of the first downlink information. Is the second preset value.
17. The method according to claim 15, wherein the preset condition further comprises a third condition, wherein the third condition is that the first time unit in which the first downlink information is located is in the time unit set The first time unit of a particular time domain location.
18. The method according to any one of claims 15 to 17, wherein the preset condition further comprises a fourth condition, wherein the fourth condition is that the first downlink information is carried in the at least one frequency domain The primary frequency domain unit or the primary secondary frequency domain unit in the unit.
19. The method according to claim 15, wherein when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes the time unit Feedback information corresponding to all first time units in the set.
20. The method according to claim 16, wherein the value of the indication information is set according to a preset rule associated with the subset of time units.
21. The method according to claim 20, wherein for at least one first time unit on each of the at least one frequency domain unit in the subset of time units, the preset rule is time Cumulative counting of the unit's front and back order; or

    For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.
22. The method according to any one of claims 15 to 21, wherein the at least one downlink information further includes second downlink information, and the downlink control channel for scheduling the second downlink information is a downlink of semi-persistent scheduling. And a control channel, where the first codebook further includes feedback information corresponding to the second downlink information.
23. The method according to any one of claims 15 to 22, wherein the first association relationship is predefined according to a standard and/or the network device configures the terminal device by radio resource control RRC signaling configuration. of.
24. The method according to any one of claims 15 to 22, wherein the second association relationship is indicated by a downlink control channel for dynamically scheduling the first downlink information.
25. The method according to any one of claims 15 to 24, wherein before the network device receives the uplink control information sent by the terminal device in the second time unit, the method further includes:

    Determining, by the network device, a semi-static codebook mode from a plurality of candidate codebook modes, where the plurality of candidate codebook modes include a semi-static codebook mode and a dynamic codebook mode;

    The network device configures the semi-static codebook mode to the terminal device by signaling.
26. The method according to any one of claims 15 to 25, wherein the first preset value is greater than or equal to 1, wherein when the first preset value is greater than 1, the first pre- The first downlink information is set to carry the same transport block information.
27. The method according to claim 26, wherein the first preset value of the first downlink information is scheduled by the same downlink control channel.
28. The method according to claim 26, wherein the first preset value is less than or equal to a third preset value, and the third preset value is determined according to a downlink set parameter configured by the high layer signaling.
29. A communication device for transmitting feedback information, comprising:

    Transceiving unit, configured to receive, in at least one first time unit of the set of time units, the set of time units is a set of at least one first time unit on at least one frequency domain unit configured by the terminal device;

    a processing unit, configured to determine a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship And determining, by the first codebook, the first codebook includes feedback information corresponding to the first downlink information, where the first downlink information in the subset of the time unit meets a preset condition, where One codebook does not include feedback information corresponding to a specific time unit in the time unit set, and the specific time unit is at least one of the time unit set except the first time unit in which the first downlink information is located. a first time unit, the preset condition includes a first condition, where the first condition is that the number of the first downlink information meets a first preset value, and the subset of time units is a set of the time unit a subset, the time unit subset and the second time unit have a second association relationship;

    The transceiver unit is configured to send uplink control information in the second time unit, where the uplink control information carries the first codebook.
30. The communication device according to claim 29, wherein the preset condition further comprises a second condition, wherein the second condition is to dynamically schedule indication information in a downlink control channel of the first downlink information. The value is the second preset value.
31. The communication device according to claim 29, wherein the preset condition further comprises a third condition, wherein the third condition is that the first time unit in which the first downlink information is located is the time unit set The first time unit in a particular time domain location.
32. The communication device according to any one of claims 29 to 31, wherein the preset condition further includes a fourth condition, wherein the fourth condition is that the first downlink information is carried in the at least one The primary frequency domain unit or the primary secondary frequency domain unit in the frequency domain unit.
33. The communication device according to claim 29, wherein when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes the time Feedback information corresponding to all first time units in the unit set.
34. The communication device according to claim 30, wherein the value of the indication information is set according to a preset rule associated with the subset of time units.
35. The communication device according to claim 34, wherein for at least one first time unit on each of the at least one frequency domain unit in the subset of time units, the preset rule is The cumulative count of the time units in the order before and after; or

    For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.
36. The communication device according to any one of claims 29 to 35, wherein the at least one downlink information further includes second downlink information, and the downlink control channel for scheduling the second downlink information is semi-persistently scheduled. a downlink control channel, where the first codebook further includes feedback information corresponding to the second downlink information.
37. The communication device according to any one of claims 29 to 36, wherein the first association relationship is predefined according to a standard and/or the network device is configured to the terminal device by radio resource control RRC signaling of
38. The communication device according to any one of claims 29 to 36, wherein the second association relationship is determined according to the dynamically scheduled downlink control channel.
39. The communication device according to any one of claims 29 to 38, wherein the processing unit is further configured to: determine a semi-static codebook mode from the plurality of candidate codebook modes, the plurality of candidate codebooks The mode includes a semi-static codebook mode and a dynamic codebook mode.
40. The communication device according to any one of claims 29 to 39, wherein the first preset value is greater than or equal to 1, wherein when the first preset value is greater than 1, the first The preset first downlink information carries the same transport block information.
41. The communication device according to claim 40, wherein the first preset value of the first downlink information is scheduled by the same downlink control channel.
42. The communication device according to claim 40, wherein the first preset value is less than or equal to a third preset value, and the third preset value is determined according to a downlink set parameter configured by the high layer signaling.
43. A communication device for transmitting feedback information, comprising:

    a transceiver unit, configured to send, to the terminal device, at least one downlink information in at least one first time unit of the time unit set, where the time unit set is at least one first on the at least one frequency domain unit configured by the terminal device a collection of time units;

    a processing unit, configured to determine a second time unit, where the second time unit is configured to carry feedback information corresponding to the at least one downlink information, where the time unit set and the second time unit have a first association relationship ;

    a transceiver unit, configured to receive, in the second time unit, a first codebook sent by the terminal device, where the first codebook is a first time when the first downlink information in the time unit subset meets a preset condition a codebook, the first codebook includes feedback information corresponding to the first downlink information, and the first codebook does not include feedback information corresponding to a specific time unit in the time unit set, the specific time unit And determining, by the first condition, the first condition that is the at least one first time unit except the first time unit where the first downlink information is located in the time unit set. The number of downlink information satisfies a first preset value, the subset of time units is a subset of the set of time units, and the subset of time units and the second time unit have a second association relationship.
44. The communication device according to claim 43, wherein the preset condition further includes a second condition, where the second condition is to dynamically schedule indication information in a downlink control channel of the first downlink information. The value is the second preset value.
45. The communication device according to claim 43, wherein the preset condition further comprises a third condition, wherein the third condition is that the first time unit in which the first downlink information is located is the time unit set The first time unit in a particular time domain location.
46. The communication device according to any one of claims 43 to 45, wherein the preset condition further includes a fourth condition, wherein the fourth condition is that the first downlink information is carried in the at least one The primary frequency domain unit or the primary secondary frequency domain unit in the frequency domain unit.
47. The communication device according to claim 43, wherein when the number of the first downlink information in the subset of time units does not satisfy the first condition, the first codebook includes the time Feedback information corresponding to all first time units in the unit set.
48. The communication device according to claim 44, wherein the value of the indication information is set according to a preset rule associated with the subset of time units.
49. The communication device according to claim 48, wherein said at least one first time unit on each of said at least one frequency domain unit in said subset of time units The preset rule is cumulatively counted in the order of the time unit; or

    For at least one of the at least one of the at least one frequency domain unit in the subset of time units, the preset rule is cumulatively counted in the order of the time domain after the frequency domain.
50. The communication device according to any one of claims 43 to 49, wherein the at least one downlink information further includes second downlink information, and the downlink control channel for scheduling the second downlink information is semi-persistent scheduling. a downlink control channel, where the first codebook further includes feedback information corresponding to the second downlink information.
51. The communication device according to any one of claims 43 to 50, wherein the first association relationship is predefined according to a standard and/or the network device is configured to the terminal device by radio resource control RRC signaling Configured.
52. The communication device according to any one of claims 43 to 50, wherein the second association relationship is indicated by a downlink control channel for dynamically scheduling the first downlink information.
53. The communication device according to any one of claims 43 to 52, wherein the processing unit is further configured to:

    Determining a semi-static codebook mode from a plurality of candidate codebook modes, the plurality of candidate codebook modes including a semi-static codebook mode and a dynamic codebook mode;

    And a transceiver unit, configured to configure the semi-static codebook mode to the terminal device by using signaling.
54. The communication device according to any one of claims 43 to 53, wherein the first preset value is greater than or equal to 1, wherein when the first preset value is greater than 1, the first The preset first downlink information carries the same transport block information.
55. The communication device according to claim 54, wherein the first preset value of the first downlink information is scheduled by the same downlink control channel.
56. The communication device according to claim 54, wherein the first preset value is less than or equal to a third preset value, and the third preset value is determined according to a downlink set parameter configured by the high layer signaling.
57. A communication device, comprising:

    a memory for storing a computer program;

    A processor for executing a computer program stored in the memory to cause the communication device to perform the method of any one of claims 1 to 28.
58. A computer readable storage medium comprising a computer program, when executed on a computer, causing the computer to perform the method of any one of claims 1 to 28.
59. A computer program product, comprising a computer program, which when executed on a computer, causes the computer to perform the method of any one of claims 1 to 14 or 15 to 28.
60. A communication system, comprising: a communication device for performing the method of any one of claims 1 to 14, and a method for performing the method of any one of claims 15 to 28. communication device.

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