Dynamic signaling of feedback mode

Abstract

Methods, apparatuses, and systems are disclosed that enable dynamic signaling of various feedback modes. In one example aspect, a method for wireless communication includes a base station transmitting a message to a terminal device that configures the terminal device to operate in a feedback mode, and performing transmissions with the terminal device in accordance with the feedback mode.

Description

Technical Field

[0001] This patent document generally relates to wireless communication. Background Technology

[0002] Mobile communication technology is driving the world toward an increasingly interconnected and networked society. The rapid growth and technological advancements in mobile communications have created greater demands for capacity and connectivity. Other important aspects, such as energy consumption, equipment cost, spectrum efficiency, and latency, are also crucial for meeting the needs of various communication scenarios. Various technologies are under discussion, including new methods to provide higher quality of service, longer battery life, and improved performance. Summary of the Invention

[0003] The patent document specifically describes a technology that enables dynamic signaling with various feedback modes, thereby facilitating appropriate feedback reporting based on application scenarios.

[0004] In one example aspect, a method for wireless communication includes: a base station sending a message to a terminal device that configures the terminal device to operate in a feedback mode; and performing a transmission with the terminal device according to the feedback mode.

[0005] In another example, a method for wireless communication includes: a terminal device receiving a message from a base station that configures the terminal device to operate in a feedback mode; and performing a transmission with the base station according to the feedback mode.

[0006] In another example, a method for wireless communication includes: a base station configuring a resource set for a terminal device to transmit control information, wherein the resource set includes one or more resources. At least one of the one or more resources is associated with a feedback mode. The method further includes: the base station sending an indication to the terminal device indicating the resource for the terminal device to transmit control information and the feedback mode associated with the resource.

[0007] In another example, a method for wireless communication includes: a terminal device receiving configuration information from a base station. The configuration information includes information about a set of resources for the terminal device to transmit control information. The resource set includes one or more resources, and the configuration information indicates that at least one of the one or more resources is associated with a feedback mode. The method includes: the terminal device receiving an indication from the base station indicating the resources for the terminal device to transmit control information and the feedback mode associated with the resources; and operating the terminal device according to the indication.

[0008] In another example, a method for wireless communication includes: a terminal device receiving indication information from a base station. The indication information indicates that multiple feedback messages based on various feedback modes will be transmitted in a time-domain unit. The method further includes: the terminal device sending the multiple feedback messages to the base station by applying an acknowledgment and non-acknowledgment mode that always provides feedback to the time-domain unit.

[0009] In another example, a method for wireless communication includes: a base station sending indication information to a terminal device. The indication information indicates that multiple feedback messages based on various feedback modes will be transmitted in a time-domain unit. The method further includes: the base station receiving the multiple feedback messages from the terminal device in a time-domain unit using an acknowledgment and non-acknowledgment mode that always provides feedback.

[0010] In another example, a communication device is disclosed. The device includes a processor configured to implement the methods described above.

[0011] In yet another example, a computer program storage medium is disclosed. This computer program storage medium includes code stored thereon. When executed by a processor, this code causes the processor to implement the described method.

[0012] These and other aspects are described in this document. Attached Figure Description

[0013] Figure 1 An example Hybrid Automatic Repeat Request (HARQ) feedback mechanism is shown.

[0014] Figure 2A This is a flowchart representation of a method for wireless communication based on this technology.

[0015] Figure 2B This is a flowchart representation of another method for wireless communication based on this technology.

[0016] Figure 3A This is a flowchart representation of another method for wireless communication based on this technology.

[0017] Figure 3B This is a flowchart representation of another method for wireless communication based on this technology.

[0018] Figure 4A This is a flowchart representation of another method for wireless communication based on this technology.

[0019] Figure 4B This is a flowchart representation of another method for wireless communication based on this technology.

[0020] Figure 5An example of a wireless communication system is shown, in which techniques according to one or more embodiments of the present technology can be applied.

[0021] Figure 6 This is a block diagram representation of a portion of a radio station applicable to one or more embodiments of the present technology. Detailed Implementation

[0022] Section headings are used in this document for readability purposes only and not to limit the scope of the embodiments and techniques disclosed in each section to that section only. Examples of fifth-generation (5G) wireless protocols are used to describe certain features. However, the applicability of the disclosed techniques is not limited to 5G wireless systems.

[0023] In current 5G communication systems, terminal devices provide feedback information to base stations to facilitate the scheduling of subsequent transmissions. For example, ... Figure 1 As shown, a Hybrid Automatic Repeat Request (HARQ) Acknowledgement (ACK) feedback mode is used to provide HARQ ACK and Non-Acknowledgement (NACK) feedback to facilitate high-rate forward error correction (FEC) and automatic repeat request (ARQ) error control. In HARQ-ACK mode, both ACK and NACK feedback are always provided. With the development of wireless technology, additional feedback modes have been introduced. An example HARQ feedback mode is described below:

[0024] (1) HARQ-ACK feedback mode: always provides feedback (ACK and NACK) regardless of whether the transmission is successfully received.

[0025] (2) NACK-only feedback mode: Feedback is provided only when reception fails (NACK).

[0026] (3) ACK-only feedback mode: Feedback is provided only when reception is successful (ACK).

[0027] (4) Disable feedback mode: Disable feedback regardless of whether data reception fails or succeeds.

[0028] Each of the above example feedback patterns is considered to have its own applicable scenario. For example, the classic feedback pattern (HARQ-ACK feedback pattern) is suitable for regular services. For high-reliability services, NACK-only feedback is provided to reduce feedback signaling overhead. For semi-static configurations with short transmission cycles, ACK-only feedback is more beneficial for reducing feedback signaling overhead. The disable feedback pattern is suitable for ideal channel environments, and the base station can stop UE feedback for a short time, thereby saving feedback overhead.

[0029] As network conditions and transmission types change, it is necessary to update the feedback method accordingly. This patent document discloses techniques that can be implemented in various embodiments to dynamically transmit signals and update feedback modes, thereby ensuring that the base station can obtain appropriate feedback without incurring necessary signaling overhead.

[0030] Figure 2A This is a flowchart representation of a method 200 for wireless communication according to the present technology. Method 200 includes: at operation 210, a base station sending a message to a terminal device, the message configuring the terminal device to operate in a feedback mode. Method 200 further includes: at operation 220, performing a transmission with the terminal device according to the feedback mode.

[0031] Figure 2B This is a flowchart representation of a method for wireless communication according to the present technology. Method 250 includes: at operation 260, a terminal device receiving a message from a base station, the message configuring the terminal device to operate in a feedback mode. Method 250 further includes: at operation 270, performing a transmission with the base station according to the feedback mode.

[0032] In some embodiments, the feedback modes include: an acknowledged and non-acknowledged mode that always provides feedback; a non-acknowledged mode that provides feedback only when the transmission fails or is not detected; an acknowledged mode that provides feedback only when the transmission succeeds; or a disabled mode that disables feedback. In some embodiments, the message includes a Radio Resource Configuration (RRC) signaling message. In some embodiments, the message is transmitted on a multicast control channel. In some embodiments, the message includes one or more feedback modes configured for semi-persistent scheduling.

[0033] In some embodiments, the message includes a Downlink Control Information (DCI) message, which includes one or more fields indicating a feedback mode. In some embodiments, resources for the terminal device to transmit control information to the base station are specified in the message. This resource is associated with the feedback mode. In some embodiments, the resource is specified using a Physical Uplink Control Channel (PUCCH) resource indicator in the DCI message. In some embodiments, if a resource is not configured with a corresponding feedback mode, a default feedback mode is used as the feedback mode.

[0034] Figure 3A This is a flowchart representation of a method for wireless communication. Method 300 includes: at operation 310, a base station configuring a resource set for a terminal device to transmit control information. The resource set includes one or more resources. At least one of the one or more resources is associated with a feedback mode. Method 300 further includes: at operation 320, the base station sending an indication to the terminal device indicating the resources for the terminal device to transmit control information and the feedback mode associated with those resources.

[0035] Figure 3B This is a flowchart representation of a method for wireless communication. Method 350 includes: at operation 360, a terminal device receiving configuration information from a base station. The configuration information includes information about a resource set for the terminal device to transmit control information. The resource set includes one or more resources, and the configuration information indicates that at least one of the one or more resources is associated with a feedback mode. Method 350 includes: at operation 370, the terminal device receiving an indication from the base station indicating the resources for the terminal device to transmit control information and the feedback mode associated with the resources. Method 350 further includes: at operation 380, operating the terminal device according to the indication.

[0036] In some embodiments, feedback modes include: an acknowledgment and non-acknowledgment mode that always provides feedback; a non-acknowledgment-only mode that provides feedback only when a transmission fails or is not detected; an acknowledgment-only mode that provides feedback only when a transmission succeeds; and a disable mode that disables feedback. In some embodiments, one or more resources in a resource set are associated with different feedback modes. In some embodiments, if the configuration information fails to indicate the feedback mode associated with a resource, a default feedback mode is assumed to be associated with the resource in the resource set. In some embodiments, the configuration information is carried in a Physical Uplink Control Channel (PUCCH) - Configuration message or a Semi-Persistent Scheduling (SPS) - PUCCH - AN - List - r16 message. In some embodiments, the indication is carried in a Downlink Control Information (DCI) message.

[0037] Figure 4A This is a flowchart representation of a method for wireless communication. Method 400 includes: at operation 410, a terminal device receives indication information from a base station. The indication information indicates that multiple feedback messages based on one or more feedback modes will be transmitted in a time domain unit. Method 400 includes: at operation 420, the terminal device sends multiple feedback messages to the base station by applying an acknowledged and unacknowledged mode that always provides feedback to the time domain unit.

[0038] Figure 4B This is a flowchart representation of a method for wireless communication. Method 450 includes: at operation 460, a base station sends indication information to a terminal device. The indication information indicates that multiple feedback messages based on one or more feedback modes will be transmitted in a time-domain unit. Method 450 also includes: at operation 470, the base station receives multiple feedback messages from the terminal device in a time-domain unit using an acknowledged and unacknowledged mode that always provides feedback.

[0039] In some embodiments, the time-domain unit includes a time slot or a sub-time slot. In some embodiments, the one or more feedback modes include at least: a non-acknowledgment-only mode that provides feedback only when the transmission is unsuccessful or not detected; an acknowledgment-only mode that provides feedback only when the transmission is successful; or an acknowledgment and non-acknowledgment mode.

[0040] In some embodiments, the plurality of feedback information is determined based on one or more feedback modes. In some embodiments, the plurality of feedback information includes at least one of the following: plurality of feedback information based on one or more unacknowledged-only modes; plurality of feedback information based on one or more acknowledged-only modes; or plurality of feedback information based on different types of feedback modes. In some embodiments, the plurality of feedback information based on one or more feedback modes includes physical uplink control channel information corresponding to plurality of feedback information overlapping with each other in the time domain.

[0041] Some examples of the disclosed techniques are further described in the following example embodiments.

[0042] Example 1

[0043] In some embodiments, a base station may send a message to a terminal device configuring the terminal device to operate in feedback mode. This message may be a DCI message transmitted on a control channel. For example, one or more existing parameter fields in the DCI message may be reinterpreted to indicate feedback mode. Alternatively or additionally, one or more new parameter fields may be added to the DCI message to indicate feedback mode. The user equipment (UE) receiving the DCI message can determine the feedback mode based on the values ​​of one or more parameter fields.

[0044] If one or more existing parameter fields in the DCI message are used to indicate the feedback mode, the feedback mode can be determined by a combination of parameter field values. For example, one or more of the following parameter fields in the DCI can be interpreted simultaneously or combined for feedback mode indication.

[0045] Frequency domain resource allocation

[0046] -Time-domain resource allocation

[0047] -HARQ process number

[0048] - Downlink Allocation Index

[0049] -Physical Uplink Control Channel (PUCCH) Resource Indicator

[0050] -Physical Downlink Shared Channel (PDSCH) to HARQ Feedback Timing Indicator

[0051] -PUCCH resource indicator (PRI)

[0052] In some embodiments, one or more bits in the parameter field can be used to indicate the feedback mode. For example, multiple highest or lowest bits in the parameter field can be used. In some embodiments, if the message does not carry information indicating the feedback mode, a default or preset feedback mode (e.g., HARQ-ACK feedback mode) can be used. For example, an empty (NULL) parameter field (e.g., a parameter field configured to have zero bits) can be associated with a default or preset feedback mode.

[0053] Example 2

[0054] In some embodiments, the base station may use Radio Resource Configuration (RRC) messages to configure and / or indicate the feedback mode. In some embodiments, the base station may use Media Access Control (MAC) Control Element (CE) messages to configure and / or indicate the feedback mode. In some embodiments, for Multicast and Broadcast Service (MBS), the feedback mode may be configured by messages carried on the Multicast Control Channel (MCCH). When the UE receives an MBS transmission, the UE provides feedback according to the feedback mode configured for the MBS service.

[0055] In some embodiments, for semi-persistent scheduling (SPS), a feedback mode can be configured in the SPS configuration. For example, a feedback mode corresponding to each SPS configuration can be configured in the SPS configuration (SPS-Config). When the UE receives an SPS transmission according to the SPS-Config signaling, the UE can also use the feedback mode corresponding to the SPS configuration.

[0056] In some embodiments, RRC messages can be used to configure multiple candidate feedback modes for the UE. For example, multiple candidate feedback modes can be configured for an SPS configuration in the SPS-Config signaling. The base station then sends a second message (e.g., a DCI message as described in Embodiment 1) to select a specific feedback mode from the candidate feedback modes.

[0057] Example 3

[0058] In some embodiments, resources used for reporting uplink control information (e.g., PUCCH resources) may be associated with a corresponding feedback mode. The base station configures one or more PUCCH resources for the UE to perform uplink reporting. If a PUCCH resource is configured to be associated with a feedback mode, the UE can use the corresponding feedback mode to provide feedback.

[0059] In some embodiments, different feedback modes can be configured for different PUCCH resources. In some embodiments, if the PUCCH is not configured to be associated with any feedback mode, the default feedback mode (e.g., HARQ-ACK feedback mode) is used.

[0060] In some embodiments, the UE can be configured with more than one candidate feedback mode, such as those discussed in Embodiment 2. For example, both the HARQ-ACK feedback mode and the NACK-only feedback mode can be configured as candidate feedback modes. The UE then receives a PUCCH resource configuration indicating that the PUCCH resource is associated with the NACK-only feedback mode. For subsequent feedback reports, the UE adopts the NACK-only feedback mode. If the PUCCH resource does not have an associated feedback mode, the HARQ-ACK feedback mode can be used instead.

[0061] Example 4

[0062] In some embodiments, the base station can configure a resource set for the UE to perform uplink reporting. The resource set may include one or more resources (e.g., one or more PUCCH resources). The PUCCH resources in the resource set may be associated with different feedback modes.

[0063] The current PUCCH resource selection mechanism can be reused to obtain PUCCH resources. Alternatively, the corresponding feedback mode can be determined when selecting PUCCH resources. For example, the PUCCH Resource Indicator (PRI) field in the DCI message can be used to select PUCCH resources from the PUCCH resource set. The UE can then perform subsequent transmissions based on the PUCCH resources and / or the corresponding feedback mode.

[0064] For example, a resource set comprising Q PUCCH resources is configured, where Q is a positive integer. The Q PUCCH resources include a maximum of M PUCCH resources associated with the HARQ-ACK feedback mode and a maximum of N PUCCH resources associated with the NACK-only feedback mode. Based on the configured PUCCH resources, the base station can flexibly switch between different feedback modes using signaling messages (e.g., DCI signaling). To further reduce signaling overhead, if a PUCCH resource is not configured with a feedback mode, the default feedback mode is used to provide feedback.

[0065] As another example, multiple feedback modes (e.g., NACK-only feedback mode, ACK-only feedback mode, and HARQ-ACK feedback mode) can be candidate feedback modes configured in the SPS. The base station can configure a PUCCH resource set and can include PUCCH resources associated with different feedback modes in the PUCCH resource set. The UE is then notified to select a PUCCH resource from the PUCCH resource set based on the PRI field in the DCI. The UE can then use the feedback mode corresponding to the PUCCH resource to perform feedback reporting.

[0066] For MBS transmissions, the base station can use a set of group common control information shared by multiple UEs to schedule MBS transmissions to multiple UEs. Alternatively, the base station can use UE-specific control information to schedule MBS transmissions to multiple UEs. Both scheduling methods have their own advantages and disadvantages. If group common control information is used, the NACK-only feedback mode is more advantageous because it reduces the signaling overhead of simultaneous acknowledgments from multiple UEs. The base station can use the PRI field in the DCI message carried on the group common PDCCH to indicate that one or more resources are associated with the NACK-only feedback mode. If UE-specific control information is used, the HARQ-ACK feedback mode is more suitable for each UE to provide complete feedback for the transmission. The base station can use the PRI field in the DCI message carried on the UE-specific PDCCH to indicate that one or more resources are associated with the HARQ-ACK feedback mode.

[0067] To disable feedback reporting, the base station can, for example, indicate via a DCI message that a feedback-disabled mode should be used. In some embodiments, empty PUCCH resources can be configured in a resource set. Empty PUCCH resources are specifically associated with a feedback-disabled mode. When the PRI field in a DCI message indicates an empty PUCCH resource from the resource set, the UE can disable feedback reporting for subsequent transmissions. Alternatively or additionally, when the PRI field indicates that a PUCCH resource is not configured in the resource set, the unconfigured resource is associated with a feedback-disabled mode. For example, a 3-bit PRI field can indicate up to eight resources. The resource set only has seven PUCCH resources configured corresponding to values ​​0 to 6. When the PRI field has a value of 7, corresponding to a resource not configured for the resource set, the UE can interpret the value of the PRI field as a feedback-disabled mode.

[0068] Example 5

[0069] In some cases, the mixed use of different feedback modes and the semi-static or dynamic construction of codebooks or dynamic codebook mechanisms can lead to inconsistencies between the base station and the UE. For example, a UE may be configured with a semi-static codebook mechanism to construct a HARQ-ACK codebook. Then, a NACK-only feedback mechanism may be configured for the UE. When the base station schedules one or more PDSCH transmissions via DCI signaling (e.g., PDSCH1, PDSCH2, PDSCH3), problems may arise when a portion of the NACK-only feedback information is multiplexed into the HARQ-ACK codebook, because the UE and base station may have inconsistent understandings of the size and location of the multiplexed feedback information. In a specific example, PDSCH1 reception fails, while PDSCH2 and PDSCH3 reception succeeds. The UE uses a NACK-only feedback mode, providing a 1-bit HARQ-ACK codebook with NACK for PDSCH1. However, given a 1-bit HARQ-ACK codebook, the base station does not know which PDSCH has failed.

[0070] The problems discussed above can be solved using at least one of the following methods.

[0071] Method 1 If the UE is configured with a NACK-only feedback mode or an ACK-only feedback mode with a semi-static codebook mechanism or a dynamic codebook mechanism, and if the HARQ-ACK codebook includes more than one NACK-only or ACK-only feedback message, or includes multiple feedback messages corresponding to different feedback modes (e.g., NACK-only, ACK-only, or HARQ-ACK), then the UE switches back to the HARQ-ACK feedback mode for HARQ-ACK codebook construction.

[0072] Method 2If the UE is configured to report multiple feedback messages corresponding to different feedback modes in the same time domain, the UE switches back to HARQ-ACK feedback mode. For example, the UE is configured with NACK-only (or ACK-only) feedback mode. The base station instructs the UE to send multiple feedback messages for NACK-only (or ACK-only) feedback mode in the same time slot or sub-time slot n, and the UE switches back to HARQ-ACK feedback mode to build a HARQ-ACK codebook for all PDSCHs, regardless of whether the reception is correct or incorrect. As another example, the UE is configured with both NACK-only and ACK-only feedback modes. The base station instructs the UE to send one or more feedback messages for NACK-only feedback mode and / or one or more feedback messages for ACK-only feedback mode in the same time slot or sub-time slot n, and the UE switches back to HARQ-ACK feedback mode to build a HARQ-ACK codebook. As yet another example, the UE is configured with either NACK-only or ACK-only feedback mode. The base station instructs the UE to transmit one or more feedbacks for NACK-only feedback mode (and / or one or more feedbacks for ACK-only feedback mode) and one or more feedbacks for HARQ-ACK feedback mode in the same time slot or sub-time slot n. The UE then switches back to HARQ-ACK feedback mode to construct the HARQ-ACK codebook. Because the multiple feedbacks carried on the PUCCH overlap in the time domain (e.g., in the same time domain unit), the UE switches back to HARQ-ACK feedback mode to construct the HARQ-ACK codebook for all PDSCHs.

[0073] Example 6

[0074] Currently, one type of HARQ-ACK codebook is called a Type 3 codebook, as defined in 3GPP TS 38.213. Constructing a Type 3 codebook requires unsent feedback information from all HARQ procedures. Therefore, even when the feedback mechanism is disabled or not needed, Type 3 codebooks can introduce significant signaling overhead because the codebook needs to be filled with information from all HARQ procedures (necessary or unnecessary). The same signaling overhead problem exists in Type 1 codebooks (defined in 3GPP TS 38.213). This problem can be addressed using at least one of the following methods.

[0075] Method 1:

[0076] When a type 3 or type 1 codebook construction is triggered, the construction of the codebook does not include any feedback information for one or more of the following types of transmissions:

[0077] 1. PDSCH transmission with a disabled feedback report;

[0078] 2. SPS configuration with feedback reports that can be disabled;

[0079] 3. MBS services with feedback reports that can be disabled; or

[0080] 4. MBS service does not require feedback information.

[0081] In other words, when feedback reports are disabled or not needed, there is no need to fill the codebook with unnecessary information, thereby reducing the signaling overhead of the Type 3 or Type 1 codebook.

[0082] Method 2:

[0083] Alternatively or additionally, a Type 3 or Type 1 codebook is constructed based on the index of the active SPS configuration, rather than all HARQ processes. For example, four SPS configurations are configured for the UE, with indices SPS0, SPS1, SPS2, and SPS3. The SPS2 configuration is disabled for feedback reporting. When codebook construction is triggered, the UE constructs the codebook sequentially (e.g., in ascending order) according to the index of the enabled SPS configuration. For example, construction could begin with SPS0, followed by SPS1 and SPS3. The HARQ-ACKs of the SPS configurations are then concatenated to form the codebook. Therefore, feedback information from the enabled SPS configuration is reported only, reducing signaling overhead for the codebook.

[0084] Method 3

[0085] For MBS transmissions, the construction of a Type 3 or Type 1 codebook includes only untransmitted HARQ-ACK information that meets one of the following conditions:

[0086] 1. HARQ-ACK information for one or more MBS indicated in the DCI only.

[0087] 2. HARQ-ACK information for MBS corresponding only to RNTI of DCI.

[0088] 3. HARQ-ACK information received by the UE from all MBS.

[0089] 4. HARQ-ACK information received by the UE from all MBS, excluding MBS that have de-enabled feedback reports.

[0090] In this way, only a subset of feedback information is included in the codebook, thereby reducing signaling overhead.

[0091] Figure 5An example of a wireless communication system 500 is illustrated, in which techniques according to one or more embodiments of the present invention can be applied. The wireless communication system 500 may include one or more base stations (BS) 505a, 505b, one or more wireless devices 510a, 510b, 510c, 510d, and a core network 525. Base stations 505a and 505b may provide wireless services to wireless devices 510a, 510b, 510c, and 510d in one or more wireless sectors. In some embodiments, base stations 505a and 505b include directional antennas to generate two or more directional beams to provide wireless coverage in different sectors.

[0092] The core network 525 can communicate with one or more base stations 505a and 505b. The core network 525 provides connectivity with other wireless communication systems and wired communication systems. The core network may include one or more service subscription databases to store information related to subscribed wireless devices 510a, 510b, 510c, and 510d. The first base station 505a can provide wireless services based on a first wireless access technology, while the second base station 505b can provide wireless services based on a second wireless access technology. Depending on the deployment scenario, base stations 505a and 505b can be located in the same area or can be installed separately in the field. Wireless devices 510a, 510b, 510c, and 510d can support a variety of different wireless access technologies. The technologies and embodiments described in this document can be implemented by base stations of the wireless devices described in this document.

[0093] Figure 6 This is a block diagram representation of a portion of a radio station that can be applied according to one or more embodiments of the present technology. Radio station 605, such as a base station or terminal device (or wireless device), may include processor electronics 610, such as a microprocessor, which implements one or more wireless technologies presented herein. Radio station 605 may include transceiver electronics 615 for transmitting and / or receiving wireless signals via one or more communication interfaces, such as an antenna 620. Radio station 605 may include other communication interfaces for transmitting and receiving data. Radio station 605 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some embodiments, processor electronics 610 may include at least a portion of transceiver electronics 615. In some embodiments, at least some of the disclosed technologies, modules, or functions are implemented using radio station 605. In some embodiments, radio station 605 may be configured to perform the methods described herein.

[0094] It should be understood that this document discloses techniques that can be implemented in various embodiments to signal notifications and invoke appropriate feedback reports while reducing reporting overhead. The disclosed and other embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuits, or in computer software, firmware, or hardware (including the structures disclosed in this document and their structural equivalents), or in a combination of one or more of them. The disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by a data processing device or for controlling the operation of a data processing device. A machine-readable storage medium can be a machine-readable storage device, a machine-readable storage substrate, a storage device, a combination of materials that implement machine-readable propagation signals, or a combination of one or more of them. The term "data processing apparatus" includes all means, devices, and machines for processing data, such as a programmable processor, a computer, or a plurality of processors or computers. In addition to hardware, the apparatus may also include code that creates an execution environment for the computer program in question, for example, code constituting processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. A propagating signal is an artificially generated signal, such as a machine-generated electrical, optical, or electromagnetic signal, which is generated to encode information for transmission to a suitable receiver device.

[0095] Computer programs (also known as programs, software, software applications, scripts, or code) can be written in any programming language, including compiled or interpreted languages, and can be deployed in any form, including as standalone programs, or as modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored as a part of a file containing other programs or data (e.g., one or more scripts stored in a markup language file), in a single file dedicated to the program in question, or in multiple co-located files (e.g., multiple files containing one or more modules, subroutines, or portions of code). A computer program can be deployed to execute on a single computer or on multiple computers located at a single site or distributed across multiple sites and interconnected via a communication network.

[0096] The processes and logic flows described in this document can be executed by one or more programmable processors, which execute one or more computer programs to perform functions by manipulating input data and generating outputs. The processes and logic flows can also be executed by dedicated logic circuits, and the devices can be implemented as dedicated logic circuits, such as field-programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs).

[0097] For example, processors suitable for executing computer programs include general-purpose and special-purpose microprocessors, as well as any one or more processors of any kind of digital computer. Typically, the processor receives instructions and data from read-only memory or random access memory, or both. The basic components of a computer are a processor for executing instructions and one or more storage devices for storing instructions and data. Typically, a computer will also include one or more mass storage devices (e.g., magnetic disks, magneto-optical disks, or optical disks) for storing data, or be operatively coupled to one or more mass storage devices to receive data from or transfer data to them, or both. However, a computer does not necessarily need to have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, such as: semiconductor memory devices, such as EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD-ROMs and DVD-ROMs. The processor and memory may be supplemented by or incorporated into special-purpose logic circuitry.

[0098] While this patent document contains numerous details, these details should not be construed as limiting any invention or potentially claimed scope, but rather as descriptions of features that may be specific to particular embodiments of a particular invention. Some features described in the context of different embodiments in this patent document may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although features may be described above as functioning in certain combinations and even initially claimed in this way, in some cases, one or more features from a claimed combination may be removed from that combination, and the claimed combination may refer to a sub-combination or a variation thereof.

[0099] Similarly, although operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order, or requiring all shown operations to achieve the desired result. Furthermore, the separation of various system components in the embodiments described in this patent document should not be construed as requiring such separation in all embodiments.

[0100] Only some implementations and examples are described, and other implementations, enhancements and variations may be made based on what is described and shown in this patent document.

Claims

1. A method for wireless communication, comprising: The terminal device receives a Radio Resource Configuration (RRC) message from a base station, wherein the RRC message indicates a feedback mode for Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information for Multicast and Broadcast Services (MBS), wherein the feedback mode is a first feedback mode or a second feedback mode, the first feedback mode providing ACK and non-ACK, and the second feedback mode providing only NACK; and In response to the terminal device requesting to reuse the second feedback information corresponding to the second feedback mode and the first feedback information corresponding to the first feedback mode, the terminal device provides the second feedback information based on the first feedback mode.

2. The method according to claim 1, comprising: The terminal device receives downlink control information (DCI) from the base station, wherein the DCI includes indication information, which indicates: providing ACK and NACK based on the first feedback mode; or disabling feedback.

3. The method according to claim 1, wherein, In response to the terminal device being configured with the second feedback mode, the method further includes: In response to the terminal device providing feedback information based on the second feedback mode, which consists of multiple information bits, the terminal device provides the multiple information bits based on the first feedback mode.

4. The method according to claim 1, comprising: The terminal device receives resource configuration information from the base station, wherein the resource configuration information configures different resources for the first feedback mode and the second feedback mode, respectively.

5. A method for wireless communication, comprising: The base station sends a Radio Resource Configuration (RRC) message to the terminal device, wherein the RRC message indicates a feedback mode for Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information used for Multicast and Broadcast Services (MBS), wherein the feedback mode is a first feedback mode or a second feedback mode, the first feedback mode providing ACK and non-ACK, and the second feedback mode providing only NACK; and In response to the base station determining that the terminal multiplexes second feedback information corresponding to the second feedback mode and first feedback information corresponding to the first feedback mode, the base station determines that the second feedback information is provided based on the first feedback mode.

6. The method according to claim 5, comprising: The base station sends downlink control information (DCI) to the terminal device, wherein the DCI includes indication information, which indicates: providing ACK and NACK based on the first feedback mode; or disabling feedback.

7. The method according to claim 5, comprising: In response to the base station determining that the feedback information provided according to the second feedback mode is a plurality of information bits, the base station determines that the plurality of information bits are provided according to the first feedback mode.

8. The method according to claim 5, comprising: The base station sends resource configuration information to the terminal device, wherein the resource configuration information configures different resources for the first feedback mode and the second feedback mode, respectively.

9. A device for wireless communication, the device comprising one or more processors, the one or more processors being configured to: Receive a Radio Resource Configuration (RRC) message from the base station, where, The RRC message indicates a feedback mode for the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information used for multicast and broadcast services (MBS), wherein the feedback mode is either a first feedback mode or a second feedback mode, the first feedback mode providing ACK and non-ACK, and the second feedback mode providing only NACK; and In response to the need to reuse the second feedback information corresponding to the second feedback mode and the first feedback information corresponding to the first feedback mode, the second feedback information is provided based on the first feedback mode.

10. The device according to claim 9, comprising: Receive downlink control information (DCI) from the base station, wherein the DCI includes indication information, the indication information being used to indicate: provide ACK and NACK based on the first feedback mode; or disable feedback.

11. The device according to claim 9, wherein, In response to the device being configured with the second feedback mode, the one or more processors are configured to: In response to the fact that the feedback information provided according to the second feedback mode is a plurality of information bits, the plurality of information bits are provided based on the first feedback mode.

12. The device according to claim 9, wherein, The one or more processors are configured to: Receive resource configuration information from the base station, wherein the resource configuration information configures different resources for the first feedback mode and the second feedback mode, respectively.

13. A device for wireless communication, the device comprising one or more processors, the one or more processors being configured to: Send a Radio Resource Configuration (RRC) message to the terminal device, wherein, The RRC message indicates a feedback mode for the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information used for multicast and broadcast services (MBS), wherein the feedback mode is either a first feedback mode or a second feedback mode, the first feedback mode providing ACK and non-ACK, and the second feedback mode providing only NACK; and In response to determining that the second feedback information corresponding to the second feedback mode is reused with the first feedback information corresponding to the first feedback mode, it is determined that the second feedback information is provided based on the first feedback mode.

14. The device according to claim 13, wherein, The one or more processors are configured to: Downlink control information (DCI) is sent to the terminal device, wherein the DCI includes indication information, which indicates: providing ACK and NACK based on the first feedback mode; or disabling feedback.

15. The device according to claim 13, wherein, The one or more processors are configured to: The feedback information provided according to the second feedback mode is a plurality of information bits, which are provided according to the first feedback mode.

16. The device according to claim 13, wherein, The one or more processors are configured to: Send resource configuration information to the terminal device, wherein the resource configuration information configures different resources for the first feedback mode and the second feedback mode respectively.

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