TURBO-HARQ uplink control information feedback compression

Abstract

Methods, systems, and apparatus for wireless communications are described. An example wireless communications method at a user equipment includes receiving a data transmission for each of a plurality of component carriers (CCs) from a base station over a wireless channel, wherein each data transmission is associated with a number of code block groups (CBGs). The method further includes identifying a feedback protocol to be applied to the plurality of CCs, and selecting a subset of the plurality of CCs for which feedback information for the CBGs is to be reported based at least in part on the feedback protocol. The method may also include generating feedback information based at least in part on the subset of the plurality of CCs and the feedback protocol, and transmitting a feedback message to the base station, the feedback message indicating feedback information for the subset of the plurality of CCs for the wireless channel.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. Patent Application No. 17 / 338,592, entitled “TURBO-HARQ UPLINK CONTROL INFORMATION FEEDBACK COMPRESSION,” filed by ELSHAFIE et al. on June 3, 2021, and U.S. Provisional Patent Application No. 63 / 035,591, entitled “TURBO-HARQ UPLINK CONTROL INFORMATION FEEDBACK COMPRESSION,” filed by ELSHAFIE et al. on June 5, 2020, each of which is assigned to the assignee of this application and expressly incorporated herein by reference. Technical Field

[0003] The following relates generally to wireless communications, and more particularly to turbo hybrid automatic repeat request (HARQ) uplink control information (UCI) feedback compression.

[0004] background

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may use various technologies, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting the communication of multiple communication devices, which may be referred to as user equipment (UE) in addition.

[0006] Overview

[0007] The described technology relates to improved methods, systems, devices and apparatuses for supporting uplink control information (UCI) compression in Turbo-HARQ. In general, the described technology is used to fix the bit size of feedback messages in Turbo-HARQ transmissions when multiple component carriers (CCs) are used. Each CC may have one or more code block groups (CBGs) in the transmitted data. When data transmission occurs, a certain number of CBGs for each CC may be successfully received, while some CBGs may not be successfully received. This number may change between transmissions. If feedback for each CC with failed CBGs is transmitted, the size of the transmission will vary between transmissions because the number of CBGs successfully received also changes between transmissions. This size variation can lead to inefficiency and delay. The technology described herein provides a fixed size for feedback transmissions, regardless of how many CBGs fail.

[0008] A method for wireless communication at a UE is described. The method may include receiving a data transmission for each CC in a CC set from a base station on a wireless channel, wherein each data transmission is associated with a number of CBGs. The method may further include identifying a feedback protocol to be applied to the CC set, and selecting a subset of the CC set for which feedback information for CBGs is to be reported based on the feedback protocol. The method may also include generating feedback information based on the subset of the CC set and the feedback protocol, and transmitting a feedback message to the base station, the feedback message indicating feedback information for the subset of the CC set for the wireless channel.

[0009] A device for wireless communication at a UE is described. The device may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor so that the device: receives data transmission for each CC in a CC set from a base station on a wireless channel, wherein each data transmission is associated with several CBGs. The instructions may also be executable by the processor so that the device: identifies a feedback protocol to be applied to the CC set, and selects a subset of the CC set for which feedback information for CBGs is to be reported based on the feedback protocol. The instructions may also be executable by the processor so that the device: generates feedback information based on a subset of the CC set and the feedback protocol, and transmits a feedback message to the base station, the feedback message indicating feedback information for a subset of the CC set for the wireless channel.

[0010] Another apparatus for wireless communication at a UE is described. The apparatus may include: a device for receiving a data transmission for each CC in a CC set from a base station on a wireless channel, wherein each data transmission is associated with a number of CBGs. The apparatus may also include: a device for identifying a feedback protocol to be applied to the CC set, and a device for selecting a subset of the CC set for which feedback information for CBGs is to be reported based on the feedback protocol. The apparatus may also include a device for the following operations: generating feedback information based on the subset of the CC set and the feedback protocol, and transmitting a feedback message to the base station, the feedback message indicating feedback information for the subset of the CC set for the wireless channel.

[0011] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to perform the following operations: receiving data transmissions for each CC in a CC set from a base station on a wireless channel, wherein each data transmission is associated with a number of CBGs. The code may include instructions executable by the processor for the following operations: identifying a feedback protocol to be applied to the CC set, and selecting a subset of the CC set for which feedback information for CBGs is to be reported based on the feedback protocol. The code may also include instructions executable by the processor for the following operations: generating feedback information based on a subset of the CC set and the feedback protocol, and transmitting a feedback message to the base station, the feedback message indicating feedback information for a subset of the CC set for the wireless channel.

[0012] Some examples of the methods, apparatuses (devices) and non-transitory computer-readable media described herein may further include operations, features, apparatuses or instructions for determining a reception state of each CBG for each data transmission for each CC in a CC set, wherein the feedback information may be based on the reception state.

[0013] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: receiving an indication of a feedback protocol from a base station, wherein identifying the feedback protocol may be based on receiving the indication. In some examples, the indication of the feedback protocol may be included in one of a radio resource control (RRC) signal, a media access control (MAC) control element (CE), or a downlink control information (DCI) message.

[0014] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the feedback information includes one or more of a channel quality index (CQI), a modulation and coding scheme (MCS), or a downlink control information miss detection.

[0015] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the identification feedback protocol may further include operations, features, apparatuses, or instructions for the following actions: determining a maximum number of bits for feedback information, wherein generating feedback information may be based on the maximum number of bits.

[0016] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the feedback protocol defines a priority order of CCs. In such examples, selecting a subset of a set of CCs for which feedback information for a CBG is to be reported may further include operations, features, apparatus, or instructions for determining a maximum size of a subset of a set of CCs, identifying CCs that may have failed CBGs, and including a highest priority CC with at least one failed CBG in the subset of the set of CCs until the maximum size of the subset of the set of CCs is reached, wherein generating the feedback information may be based on the inclusion.

[0017] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the priority order of CCs may be based on at least one of: a CC index, a mapping of each CC to a priority level, a type of information included in the data transmission of each CC, a quality of service requirement for each CC, or a priority of information included in the data transmission of each CC.

[0018] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for determining a conflict between a first CC and a second CC having the same priority, and selecting one of the first CC and the second CC based on an order of the CCs.

[0019] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, a feedback protocol defines an order of CCs, and wherein selecting a subset of a set of CCs for which feedback information for a CBG is to be reported may further include operations, features, apparatus, or instructions for identifying CCs that may have failed CBGs, and including those CCs having at least one failed CBG in a subset of the set of CCs based on the order, wherein generating the feedback information may be based on the inclusion.

[0020] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, a feedback protocol defines a threshold number of failed CCs, and wherein selecting a subset of a set of CCs for which feedback information for CBGs is to be reported may further include operations, features, apparatus, or instructions for identifying those CCs that may have at least a threshold number of failed CBGs, and including CCs that may have at least a threshold number of failed CBGs in a subset of the set of CCs, wherein generating feedback information may be based on the inclusion.

[0021] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, including CCs that may have at least a threshold number of failed CBGs may further include operations, features, apparatus, or instructions for prioritizing CCs with a higher number of failed CBGs in a subset of a set of CCs.

[0022] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the threshold number of failed CBGs comprises a ratio of failed CBGs in each CC to the total number of CBGs in the CC. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the threshold number of failed CBGs comprises a percentage of failed CBGs in each CC.

[0023] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, a feedback protocol defines a maximum number of CCs to be included in a CC subset, and wherein selection of a subset of a set of CCs for which feedback information for a CBG is to be reported can be based on the maximum number.

[0024] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: encoding additional feedback information of two or more CCs as joint feedback information, wherein generating the feedback information may be further based on the joint feedback information. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the two or more CCs may not be included in the subset of CCs.

[0025] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: determining that the size of the feedback information can be smaller than the total size of the feedback message, wherein encoding the additional feedback information can be based on determining that the size of the feedback information can be smaller than the total size.

[0026] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, encoding additional feedback information may further include operations, features, apparatuses, or instructions for the following actions: applying a decoding table to the additional feedback information to encode the joint feedback information.

[0027] A method of wireless communication at a base station is described. The method may include: identifying a feedback protocol to be applied to a set of component carriers to determine feedback information; transmitting an indication of the feedback protocol to a user equipment (UE); transmitting a data transmission for each component carrier in the set of component carriers to the UE on a wireless channel, wherein each data transmission is associated with a number of code block groups; and receiving a feedback message from the UE according to the feedback protocol, the feedback message indicating feedback information for a subset of the set of component carriers of the wireless channel.

[0028] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: identify a feedback protocol to be applied to a set of component carriers to determine feedback information; transmit an indication of the feedback protocol to a UE; transmit a data transmission for each component carrier in the set of component carriers to the UE on a wireless channel, wherein each data transmission is associated with a number of code block groups; and receive a feedback message from the UE according to the feedback protocol, the feedback message indicating feedback information for a subset of the set of component carriers of the wireless channel.

[0029] Another apparatus for wireless communication at a base station is described. The apparatus may include means for identifying a feedback protocol to be applied to a set of component carriers to determine feedback information; transmitting an indication of the feedback protocol to a UE; transmitting a data transmission for each component carrier in the set of component carriers to the UE on a wireless channel, wherein each data transmission is associated with a number of code block groups; and receiving a feedback message from the UE according to the feedback protocol, the feedback message indicating feedback information for a subset of the set of component carriers of the wireless channel.

[0030] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: identify a feedback protocol to be applied to a set of component carriers to determine feedback information; transmit an indication of the feedback protocol to a UE; transmit a data transmission for each component carrier in the set of component carriers to the UE on a wireless channel, wherein each data transmission is associated with a number of code block groups; and receive a feedback message from the UE according to the feedback protocol, the feedback message indicating feedback information for a subset of the set of component carriers of the wireless channel.

[0031] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: determining, based on the feedback information, a reception status of each code block group for each data transmission for each component carrier in a subset of a set of component carriers.

[0032] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the feedback information includes one or more of a channel quality index, a modulation and coding scheme, or a downlink control information miss detection.

[0033] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the identification feedback protocol may further include operations, features, apparatuses, or instructions for the following actions: determining a maximum number of bits for feedback information, wherein the identification feedback protocol may be based on the maximum number of bits.

[0034] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, a feedback protocol defines a priority order of component carriers.

[0035] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the priority order of component carriers may be based on at least one of: a component carrier index, a mapping of each component carrier to a priority level, a type of information included in a data transmission of each component carrier, a quality of service requirement for each component carrier, or a priority of information included in a data transmission of each component carrier.

[0036] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, a feedback protocol defines an order of component carriers, a threshold number of failed code block groups, a maximum number of component carriers to be included in a subset of component carriers, and wherein selection of a subset of a set of component carriers for which feedback information for a code block group is to be reported can be based on the maximum number.

[0037] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: decoding joint feedback information for two or more component carriers from the feedback information.

[0038] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the two or more component carriers may not be included in the subset of component carriers.

[0039] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, encoding additional feedback information may further include operations, features, apparatuses, or instructions for the following actions: applying a decoding table to the additional feedback information to encode the joint feedback information. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1

[0013] An example of a system for wireless communications supporting turbo-HARQ UCI feedback compression in accordance with aspects of the present disclosure is illustrated.

[0042] Figure 2 An example of a block diagram of a turbo-HARQ UCI is illustrated in accordance with aspects of the present disclosure.

[0043] Figure 3 Shown is a swim lane diagram of a wireless communication system illustrating example operations supporting turbo-HARQ UCI feedback compression in accordance with aspects of the present disclosure.

[0044] Figure 4 A flow chart of a method for supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown.

[0045] Figure 5 and 6 A block diagram of an apparatus supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown.

[0046] Figure 7 A block diagram of a UE communications manager supporting turbo-HARQ UCI feedback compression is shown in accordance with aspects of the present disclosure.

[0047] Figure 8 A diagram of a system including a device supporting turbo-HARQ UCI feedback compression is shown in accordance with aspects of the present disclosure.

[0048] Fig. 9 and 10 A block diagram of an apparatus supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown.

[0049] Fig.11 A block diagram of a base station communication manager supporting turbo-HARQ UCI feedback compression is shown in accordance with aspects of the present disclosure.

[0050] Fig.12 A diagram of a system including a device supporting turbo-HARQ UCI feedback compression is shown in accordance with aspects of the present disclosure.

[0051] Figures 13 to 15 A flow chart illustrating a method of supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown.

[0052] Detailed Description

[0053] The wireless communication system may support Turbo-HARQ with AKC / NACK and channel state information (CSI) feedback. In Turbo-HARQ, the UE sends some feedback to the base station, which helps the base station change some modulation parameters to reduce errors whenever there is a NACK. However, when multiple CCs are used and each of them has multiple CBGs, the size of Turbo-HARQ may be different. This is because different numbers of CBGs may fail for different transmissions. This varying feedback information size may be inefficient and difficult to work at the UE and gNB.

[0054] Fixed size feedback information (Channel Quality Index (CQI), MCS and Downlink Control Information (DCI) Missed Detection (DTX)) can improve the functionality of Turbo-HARQ. Several methods of obtaining a fixed size are described. A method of obtaining a fixed size (e.g., a fixed bit size) can be determined and signaled between the UE and the gNB. However, by having a fixed size, not all feedback information can be transmitted for each CC. Therefore, compression can be performed on the feedback message. The different compression solutions described herein provide methods to capture different numbers of CCs.

[0055] The first approach is to discard or omit information from the feedback message. For example, an omission order protocol that can be followed can be determined for CCs. For example, if the CBG of the first CC has a NACK, the first CC can always be included, followed by the second CC, and so on. The order can be set by CC index, and higher indices can be prioritized over lower indices and vice versa. Higher CCs with NACKs are included until the fixed bit size is filled, and the remaining CCs are discarded. The UE and gNB should agree on the ordering and signaling. The signaling can be in RRC or MAC-CE and changed dynamically through DCI. This ordering can be used whenever a conflict occurs between two CCs.

[0056] The sorting and omission can be based on other criteria, such as how many NACKs a CC has, the ratio of NACKs to total CBGs, the percentage of NACKs in total CBGs, the least number of CBGs for which a CC has NACKs, the priority of the CC, the type of information sent on the CC, the maximum number of NACKs to be reported, etc.

[0057] Another technique is to jointly encode some CC information and discard other information. After selecting CCs by one of the above methods, the technique can then determine which additional CCs require uplink control information bundling. These CCs can be jointly encoded into a few remaining bits (e.g., 2 or 3 bits). Tables known at the UE and gNB can be used to encode and decode the jointly encoded UCI.

[0058] The described techniques may result in improved efficiency and communication as well as improved configuration for MCS, lower bit error rate, improved code rate, reduced system latency, and improved user experience.

[0059] Aspects of the present disclosure are initially described in the context of wireless communication systems. Aspects of the present disclosure are further illustrated and described with reference to swim lane diagrams, block diagrams, and flow charts. Aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow charts related to turbo-HARQ UCI feedback compression.

[0060] Figure 1 An example of a wireless communication system 100 supporting turbo-HARQ UCI feedback compression according to various aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0061] The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may be different forms of devices or devices with different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base stations 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 may support communication of signals according to one or more radio access technologies.

[0062] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be different forms of devices or devices with different capabilities. Figure 1Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), such as Figure 1 as shown in .

[0063] Each base station 105 may communicate with the core network 130, or communicate with each other, or both. For example, the base station 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3 or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105), or indirectly (e.g., via the core network 130), or directly and indirectly on the backhaul link 120 (e.g., via X2, Xn or other interfaces). In some examples, the backhaul link 120 may be or include one or more wireless links.

[0064] One or more of the base stations 105 described herein may include or may be referred to by a person of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a B node, an evolved B node (eNB), a next generation B node or a gigabit B node (any of which may be referred to as a gNB), a home B node, a home evolved B node, or other suitable terminology.

[0065] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as electrical appliances or vehicles, meters, etc.

[0066] The UE 115 described herein may be able to communicate with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 as shown in .

[0067] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0068] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by UE 115. A carrier may operate in a standalone mode in which initial acquisition and connection may be made by UE 115 via the carrier, or a carrier may operate in a non-standalone mode in which a connection is anchored using a different carrier (e.g., a different carrier of the same or different radio access technology).

[0069] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in an FDD mode), or may be configured to carry both downlink and uplink communications (e.g., in a TDD mode).

[0070] A carrier may be associated with a particular bandwidth of a radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as a "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)) of a carrier of a particular radio access technology. Devices (e.g., base stations 105, UEs 115, or both) of the wireless communication system 100 may have a hardware configuration that supports communications on a particular carrier bandwidth, or may be configurable to support communications on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., subband, BWP) or all of a carrier bandwidth.

[0071] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system using MCM technology, a resource element may include a code element period (e.g., the duration of a modulation code element) and a subcarrier, where the code element period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the code rate of the modulation scheme, or both). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers can further improve the data rate or data integrity of communication with UE 115.

[0072] One or more parameter designs for a carrier may be supported, where the parameter designs may include subcarrier spacing (Δf) and cyclic prefixes. A carrier may be divided into one or more BWPs with the same or different parameter designs. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications for a UE 115 may be limited to the one or more active BWPs.

[0073] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, and the basic time unit can be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the maximum supported subcarrier spacing, and Nf The maximum supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0074] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of code element periods (e.g., depending on the length of the cyclic prefix added before each code element period). In some wireless communication systems 100, the time slot may be further divided into a plurality of mini-time slots containing one or more code elements. Excluding the cyclic prefix, each code element period may include one or more (e.g., Nf) sampling periods. The duration of the code element period may depend on the subcarrier spacing or the operating frequency band.

[0075] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0076] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across a system bandwidth or a subset of a system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0077] In some examples, base stations 105 may be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0078] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents the information to a person interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, field survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0079] Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed with a reduced peak rate. Other power saving techniques for UE 115 include entering a power saving deep sleep mode when not engaged in active communications, operating on a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a subcarrier or resource block (RB) set) within a carrier, within a guard band of a carrier, or outside a carrier.

[0080] The wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private communication or group communication, and may be supported by one or more mission-critical services (such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low latency, critical mission, and ultra-reliable low latency may be used interchangeably herein.

[0081] In some examples, UE 115 may also be able to communicate directly with other UE 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105, or may not be able to receive transmissions from the base station 105 for other reasons. In some examples, each group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between each UE 115 without involving the base station 105.

[0082] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these communications. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units), or with the network, or both via one or more network nodes (e.g., base station 105) using vehicle-to-network (V2N) communications.

[0083] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by a base station 105 associated with the core network 130. User IP packets may be delivered via a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to a network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0084] Some network devices (such as base stations 105) may include subcomponents, such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or merged into a single network device (e.g., base station 105).

[0085] The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). In general, the 300 MHz to 3 GHz region is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from about 1 decimeter to 1 meter long. UHF waves may be blocked or redirected by buildings and environmental features, but these waves may penetrate various structures sufficiently for macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0086] The wireless communication system 100 may also operate in a super high frequency (SHF) zone using a frequency band from 3 GHz to 30 GHz (also known as a centimeter band) or in an extremely high frequency (EHF) zone of a spectrum (e.g., from 30 GHz to 300 GHz) (also known as a millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between UE 115 and base station 105, and the EHF antenna of the corresponding device may be smaller and more closely spaced than the UHF antenna. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and a shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency zones, and the use of frequency bands specified across these frequency zones may vary by country or regulatory agency.

[0087] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as the 5 GHz industrial, scientific, and medical (ISM) band). When operating in an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) may employ carrier sensing for conflict detection and avoidance. In some examples, operations in an unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in a licensed band. Operations in an unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0088] The base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located in one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having antenna ports of several rows and columns that the base station 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0089] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0090] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer may be IP-based. The radio link control (RLC) layer may perform packet segmentation and reassembly to communicate on a logical channel. The media access control (MAC) layer may perform priority handling and multiplex logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmission of the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration, and maintenance of an RRC connection that supports radio bearers of user plane data between UE 115 and base station 105 or core network 130. In the physical layer, transport channels may be mapped to physical channels.

[0091] UE 115 and base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. HARQ feedback is a technique for increasing the likelihood of correctly receiving data on communication link 125. HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve the throughput of the MAC layer in poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support simultaneous slot HARQ feedback, wherein the device may provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In other cases, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0092] In RLC applications, data transmission may need to be as fast as possible with the least number of retransmissions. In Turbo-HARQ, the UE provides feedback to the transmitting base station for the base station to change the modulation parameters, MCS or modulation order for subsequent retransmissions. Typically, the first transmission may have a block error rate (BLER) of 10%. The techniques described herein provide a reduced BLER, which results in improved reliability and latency. The techniques described herein may increase the likelihood that the second transmission of a data transmission will be successful.

[0093] exist Figure 1In the present invention, the UE 115 includes a UE communication manager 160. The UE communication manager 160 can perform the techniques described herein related to providing feedback in Turbo-HARQ. The UE communication manager 160 can determine which feedback protocol to use in order to have a fixed bit size Turbo-HARQ feedback. The fixed size Turbo-HARQ feedback can include CQI, MCS, or DTX for at least a subset of CCs for data transmission. Based on the feedback, the base station 105 can change one or more modulation parameters to enhance the transport layer or encode the BLER so that the retransmission should succeed with fewer errors. The UE communication manager 160 can obtain a small BLER within two transmissions per transport block and have a fixed Turbo-HARQ feedback size.

[0094] In some examples, UE communication manager 160 may receive a data transmission for each of a plurality of CCs from base station 105 over a wireless channel, wherein each data transmission is associated with a number of CBGs. UE communication manager 160 may identify a feedback protocol to be applied to a plurality of component carriers, and select a subset of the plurality of component carriers for which feedback information for code block groups is to be reported based at least in part on the feedback protocol. UE communication manager 160 may generate feedback information based at least in part on the subset of the plurality of component carriers and the feedback protocol, and

[0095] A feedback message is transmitted to a base station, the feedback message indicating feedback information for a subset of the plurality of component carriers.

[0096] The base station 105 may include a base station communication manager 165. The base station communication manager 165 may perform the techniques described herein related to receiving feedback in Turbo-HARQ. The base station communication manager 165 may determine a feedback protocol with or without negotiation with the UE 115. The base station communication manager 165 may receive feedback information about data transmission from the UE 115. The feedback information may include, for example, a negative acknowledgement (NACK), a CQI index, an MCS, a DTX, or a transmission rank. The base station communication manager 165 may update one or more transmission parameters, such as an MCS rate, based on the received feedback. Subsequently, the base station 105 may retransmit the data.

[0097] The described techniques can reduce system latency, improve MCS configuration, reduce bit error rate, improve efficiency, improve bit rate, and improve user experience. The described techniques can improve the functionality of ultra-reliable communications. Further, the described techniques can improve the functionality of the physical layer in wireless communications.

[0098] Figure 2An example of a block diagram 200 of a turbo-HARQ UCI according to aspects of the present disclosure is illustrated. In some examples, the block diagram 200 can implement aspects of the wireless communication system 100. The concepts shown in the block diagram 200 can be incorporated into a UE, such as the UE 115 described herein. The block diagram 200 illustrates how data transmission can use several CCs 210 (each CC 210 has several CBGs) and feedback of these CCs 210. For simplicity of illustration, only the CBG 220 of a single CC 210, namely the CBG of CC1 210-a, is shown.

[0099] In general, each CC may have one or more CBGs. CCk can be defined as the number of CBGs per CC k. In this example, CC1 210-a has five CBGs 220 and N CC1 =1. Two stages of feedback may be included. The first stage feedback 230 may include HARQ acknowledgments, and CQIs may be generated for each CBG 220 and may be referred to as the first stage of HARQ feedback. CBG 240 Figure 2 , which corresponds to the state of the CBG 220 for CC1 210-a. In this example, CBG1, CBG3, and CBG5 have been successfully decoded and their receive status is acknowledgement (ACK). However, two CBGs 240 failed to decode, including CBG2 and CBG4. The receive status of these CBGs 240 is negative acknowledgement (NACK). For these two CBGs 240, additional feedback may be sent in the Turbo-HARQ feedback. The additional feedback is the second stage feedback 250 and may include CQI, MCS, and DTX information.

[0100] Because there are two NACK CBGs 240 in this example, the second stage feedback 250 can be a size suitable for information related to two NACK CBGs. However, if there are four NACK CBGs 240, the second stage feedback 250 will have a size suitable for information related to four NACK CBGs. Other examples are similar. That is, the more CBGs that are NACKed, the larger the second stage feedback 250 will have to be. As more or fewer CBGs fail, the size may also be different between data transmissions. These changes in the size of the feedback message may be problematic for communication devices. The technology described herein provides a compression method for maintaining the second stage feedback 250 at a fixed size.

[0101] The size of the first stage feedback 230 may be determined in part by the HARQ-ACK codebook size. If the codebook is type 1 (e.g., semi-static codebook), the size of the first stage feedback 230 is configured by radio resource control (RRC). Alternatively, if the codebook is type 2 (e.g., dynamic codebook), the size of the first stage feedback 230 is indicated by the downlink assignment index (DAI) field in the downlink (DL) downlink control information (DCI).

[0102] The size of the second stage feedback 250 may be determined as N·K, where N is the number of NACKs in the stage 1 codebook and K is the RRC, MAC-CE, or DCI configurable bit width of the associated information with the NACK. The size of the second stage feedback 250 may depend on the payload in the first stage feedback 230. The receiver of the feedback (such as a base station) may need to decode the first stage feedback 230 before determining the size of the second stage feedback 250. The techniques described herein enable the receiver of the feedback to determine the size of the second stage feedback 250 without decoding the first stage feedback 230.

[0103] Various solutions are proposed for the variable size of the total UCI size. In order to have a fixed size, an RRC configuration can be used to provide an upper limit (B) on the total size of the first stage feedback 230 and the second stage feedback 250. Alternatively, an upper limit (L) can be set only for the second stage feedback 250. If the size of the first stage feedback 230 plus the second stage feedback 250 is greater than B for the first option, or the size of the second stage feedback 250 is greater than L for the second option, the first stage feedback 230 can always be transmitted and the second stage feedback 250 can be compressed.

[0104] Three general methods of performing compression are proposed. First, information in the second stage feedback 250 can be discarded or omitted. Second, information in the second stage feedback 250 can be bundled, combined, or jointly encoded across multiple CCs. Third, some information in the second stage feedback 250 can be discarded for some CCs and jointly encoded for other CCs.

[0105] Figure 3 An example of a swim lane diagram of a wireless communication system 300 illustrating example operations supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown. The wireless communication system 300 may include a base station 105-a and a UE 115-a. In some examples, the wireless communication system 300 may implement aspects of the wireless communication system 100, the base station 105-a may be an example of aspects of the base station 105, and the UE 115-a may be an example of aspects of the UE 115.

[0106] At 305, the base station 105-a and the UE 115 may determine a feedback protocol. In some examples, the feedback protocol may be determined a priori by one of the base station 105-a or the UE 115, and the determining device signals the other device which feedback protocol to use. In some examples, the feedback protocol is negotiated by the base station 105-a and the UE 115. In addition to the feedback protocol, the order of the CCs may be determined, which may be used to select a CC or act as a tiebreaker when two or more CCs compete for the same portion of Turbo-HARQ feedback. Different feedback protocol options are discussed below.

[0107] In some examples, to reduce the amount of feedback required, base station 105-a and UE 115 may use an omission ordering protocol, where dropping or omission is performed based on a predefined order across CCs.Some alternatives may be used.

[0108] First, the second stage feedback can omit or discard some feedback information based on the upper limit of the second stage feedback information. Figure 2 For example, assume that the second stage feedback size has been limited to 3K bits, and the predefined order of CCs provides CC1 with the highest priority, followed by CC2, CC3, CC4, and CC5 with the lowest priority. Because the second stage feedback size is limited to 3K, only three CCs can be selected to include their second stage feedback information. Due to the priority order (and assuming that all CCs 1 to 5 have NACKs), CC1 to CC3 are selected to retain their second stage feedback information. Since CC1-CC3 will fill the second stage feedback size, the second stage feedback information for CC4 and CC5 must be discarded.

[0109] Signaling for this type of solution may be provided as follows. Base station 105-a and UE 115 may agree on a general ordering for CCs based on importance. For example, the priority ordering may start from the lowest CC index to the highest CC index. Alternatively, the priority ordering may start from the highest CC index to the lowest CC index. As another option, any ordering of CCs and priority levels may be mapped.

[0110] In some examples, the signaling of the ordering may be in RRC or MAC-CE and may be changed dynamically through DCI. The ordering may be used wherever conflicts between CCs occur when a feedback protocol is used.

[0111] In one example, the feedback protocol may be blind omission based on a predefined ordering as described above. That is, those CCs with the highest priority may be included until the second stage feedback information is full, and the remaining CCs may be omitted. This example provides less computation, but may be less efficient overall for improving performance.

[0112] Another example of a feedback protocol may be based on the number of failed CRC CBGs. This type of feedback protocol may be determined in several ways. For example, a CC with a higher number of NACK CBGs may be given a higher priority than a CC with a lower number of NACK CBGs. This may result in better transmission parameters for particularly unclear channels. As a second example, the feedback protocol may be modified so that the number of NACK CBGs for each CC divided by the total number of CBGs may be used to select a subset of CCs. As a third example, the feedback protocol may be based on a percentage or threshold amount of the number of NACK CBGs for each CC relative to the total number of CBGs. Any of these alternative feedback protocols may be signaled on RRC, MAC-CE, or DCI.

[0113] Using one of the feedback protocols based on the number of failed CRC CBGs may result in conflicts (e.g., two or more CCs qualify to be included based on having the same priority, but there is not enough space for all of them). For example, if two or more CCs have the same number of NACK CBGs, these CCs may be given the same priority level. That is, they may be grouped at the same priority level. In this case, a predetermined ordering may be used.

[0114] As an example, consider using the following feedback protocol: For the example of 3 CCs, the higher number of failed CRC CBGs takes precedence. If CC1 has 4 NACK CBGs, CC2 has 2 NACK CBGs, and CC3 has 2 NACK CBGs, CC1 will be given the highest priority level (i.e., level 1), while CC2 and CC3 will be given the second priority level (in this example, level 2). If UE 115-a needs to omit some CQI, MCS, or DTX feedback, UE 115-a may omit CC2 or CC3 CQI. If only one CC needs to be omitted, UE 115-a may use the agreed-upon ordering, so if CC2 is given a higher priority order, CC3 is discarded.

[0115] Another feedback protocol may be based on the minimum number of NACK CBGs required for each CC to report the CQI of that CC. The base station 105-a may configure RRC, MAC-CE, or DCI parameters to inform the UE 115-a that this is the feedback protocol and what the minimum number of NACK CBGs per CC is. That is, the base station 105-a and the UE 115-a may agree that the UE 115-a may report the CC CQI only if the number of NACK CBGs is higher than the minimum number. For example, if the minimum number is three, the UE 115-a may send second-stage feedback only when the CC has more than three NACKs. If the CC has less than or equal to 3 NACKs, the UE 115-a may report the DTX using only 1 bit, or may even omit the DTX. It may also be possible to signal in advance whether a CC that does not meet the requirements will be discarded or signaled using 1 bit. Then, among the remaining CCs, UE 115 - a may assign bits to the highest priority CC until a certain number of bits required for both the first stage UCI and the second stage UCI are met or assign bits only to the second stage UCI.

[0116] An alternative feedback protocol may be based on a maximum number of CCs that need a NACK to report their DTX / CQI or just DTX. After determining the priority order as discussed above, UE 115-a may report second stage feedback for only a subset of those CCs. This may be a UE capability (as the UE may not be able to calculate CQI for all CCs due to lack of capability). Alternatively, only CQI or MCS may be reported in the feedback.

[0117] All of these feedback protocols can be used to reduce the number of CCs that need to report. In other examples, other feedback protocols can be used. Additionally, joint encoding for the second stage feedback information can be used, as discussed below.

[0118] return Figure 3 At 310, the base station 105-a may transmit a data transmission to the UE 115-a. The data transmission may be any type of wireless transmission sent on a wireless channel configured with multiple CCs. The UE 115-a may decode the data transmission using a decoder. At 315, the UE 115-a may determine that there are one or more decoding errors in the data transmission, which may indicate that the wireless channel may have caused errors in the data transmission on one or more CCs. For example, the wireless channel may be poor due to interference, multipath, weather conditions, etc. In some examples, the UE 115-a may perform the described techniques whenever a decoding error is detected. In other examples, the UE 115-a may perform the described techniques only when a threshold number of errors are found in the decoded data transmission.

[0119] At 320, UE 115-a may select a subset of CCs to report second stage feedback using the determined feedback protocol. For example, based on the feedback protocol, only 4 CCs out of 8 CCs may be selected to have their second stage feedback included. If there is a conflict between two or more CCs using the feedback protocol, the ranking may be used as a tiebreaker. Alternatively, a backup or secondary feedback protocol may be used to break a tie.

[0120] At 325, UE 115-a may generate feedback information. That is, first stage feedback may be generated and second stage feedback may be generated based on the inclusion of the CC subset.

[0121] At 330, if there are any remaining bits in the second stage feedback information, UE 115-a may jointly encode feedback for some CCs that are not part of the selected CC subset. Through joint encoding, two or more UCI bits across two or more CCs may be generated and included in the feedback information. Joint encoding may be triggered after CC subset selection. UE 115-a may determine any CCs whose second stage feedback information needs to be bundled. Subsequently, the second stage feedback for these CCs may be jointly encoded.

[0122] As an example, assume that RRC has configured the upper limit to L=2K+m bits, and the CC priority level is CC1 with the highest CBG NACK (highest priority), followed by CC2, followed by CC3, followed by CC4, followed by CC5. First, the second stage feedback for CC1 and CC2 will be selected because they have the highest priority and can be accommodated in L=2K+m bits. The second stage feedback for CC3, CC4, and CC5 can be bundled into m remaining bits. The second stage feedback for CC3, CC4, and CC5 can be jointly encoded into m bits, where m≤K. An index can be used for how to jointly encode based on the number of remaining bits.

[0123] If there are 3 bits remaining (m=3), and if DTX is given priority for reporting, then m bits can be used to report DTX for the remaining CCs. If m>3, three bits can still be used for DTX, and the fourth bit can be used to report additional information about the CQI of all remaining CCs or the CC with the highest priority among those CCs. Table 1 can be used for this example:

[0124]

[0125]

[0126] Table 1

[0127] As shown in Table 1, a given bit value shows what is reported for the three CCs. Base station 105-a and UE 115-a have access to this table as well as the table shown below. If m changes, another table may be used.

[0128] Alternatively, instead of encoding three CCs, UE 115-a may use m bits to encode two CCs (having a higher priority than the third remaining CC), or only encode a single CC (the highest priority one of the remaining CCs). This should be agreed upon by base station 105-a and UE 115-a.

[0129] If m=4, then Table 2 may be used. Level 0 may not require signaling, and it may simply indicate to the base station 105-a to adjust its retransmission parameters without any help from the UE 115-a. CQI level 0 may be a base station implementation. Level 1 and level 2 may be quantifications of the required CQI reduction, and these levels may be signaled using RRC / MAC-CE signaling, and these levels may be known at the base station 105-a and the UE 115-a. How much to reduce may be relative to the previous CQI.

[0130]

[0131]

[0132] Table 2

[0133] If m=2, and this is less than the number of remaining CCs, two options can be used. First, two of the remaining CCs can be signaled jointly, and the rest of the remaining CCs can be omitted. Alternatively, only one of the remaining CCs can be encoded, and all the remaining CCs can be omitted. Table 3 can be used for m=2:

[0134]

[0135]

[0136] Table 4

[0137] Additionally, there is a joint coding mode, which may be initially signaled via RRC or MAC-CE and then dynamically signaled via DCI. The first mode of joint coding may have coding across all CCs (i.e., joint coding of all CCs). All CCs may be jointly coded using L bits using the techniques described herein.

[0138] The second mode may have joint coding across all remaining CCs. That is, after assigning bits to higher priority CCs, joint coding may be performed on all remaining CCs. After assigning bits to the highest priority CC, the remaining number of bits that may be assigned to the remaining CCs may be used to jointly code information on the CCs.

[0139] The third mode may be jointly encoded across one or several remaining CCs (e.g., jointly encoding the remaining set of CCs). This mode may use the remaining bits to encode feedback of one or several (e.g., a subset) CCs. The exact (e.g., maximum) number of remaining CCs to be jointly encoded may also be signaled. For example, if the maximum number is Y, then if Y=1, UE 115-a may use the remaining bits to encode the data of the CC with the highest priority among the remaining CCs. Subsequently, UE 115-a may omit the remaining CCs. If Y=2, UE 115-a may use the remaining bits to encode the data of the two CCs with the highest priority among the remaining CCs. Subsequently, UE 115-a may omit the remaining CCs. If Y=3, UE 115-a may use the remaining bits to encode the data of the three CCs with the highest priority among the remaining CCs. Subsequently, UE 115-a may omit the remaining CCs.

[0140] Any of these feedback protocols and joint encoding methods can be used in combination in different ways. For example, a feedback protocol can be used to select a first subset of CCs to be included in the feedback information, and any remaining information can be jointly encoded. As another example, the feedback protocol can indicate that all CCs are to be jointly encoded. Any combination of feedback protocols and joint encoding is contemplated herein.

[0141] Return again Figure 3 , at 335, UE 115-a may transmit a feedback message with CQI, MCS, or DCI missed detection information to base station 115-a. The feedback message may include first stage and second stage feedback information. For example, the feedback message may include an indication of one or more of a CQI index, a number of transmission layers, a transmission rank, channel state information, DTX, or a combination thereof. In some examples, the feedback message may include an indication of a CQI index. In other examples, the feedback message may include an indication of a CQI index and a transmission rank. In other examples, the feedback message may include an indication of a transmission rank or layer. The feedback message may also include a NACK.

[0142] The base station 105-a may receive the feedback message and determine feedback information based on the feedback message. At 340, the base station 105-a may update one or more transmission parameters based on the feedback message. For example, the base station 105-a may adjust the MCS or number of transmission layers for retransmission of the data packet or for subsequent transmission of other data packets. At 345, the base station 105-a may retransmit at least some data to the UE 115-a.

[0143] Techniques described herein may utilize Turbo-HARQ to improve fidelity and reduce data errors.Using the techniques described herein, the Turbo-HARQ feedback size may be a fixed or known size.

[0144] Figure 4 A flow chart of a method 400 for supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown. In some examples, the method 400 may implement aspects of the wireless communication system 100. The method 400 may be implemented by a UE.

[0145] At 405, the UE may receive data transmissions on multiple CCs. At 410, the UE may determine a reception status for each CC. That is, each CBG of each CC may have a reception status of being received (ACK) or not received (NACK). At 415, a feedback protocol for sending the second stage feedback information may be identified. In some examples, the second stage feedback information may be identified prior to transmission of the data (such as by other signaling).

[0146] At 420, the UE may select a subset of CCs that may be included in the second stage feedback information based on the feedback protocol. However, in some examples, all CCs will be used for the joint coding method.

[0147] At 425, the UE may determine whether there are any conflicts between the priority levels of the two or more CCs based on the feedback protocol. If so, the method 400 proceeds to 430 and uses the omitted order to resolve the conflict. If not, the method 400 proceeds to 435 to determine whether there are any remaining bits in the second stage feedback information after the selected CC is included. If so, the method 400 proceeds to 440. If not, the method 400 proceeds to 450.

[0148] At 440, the UE may select a joint coding table based on the size of the remaining bits m. At 445, the UE may select CCs for joint coding and encode them according to the selected table.

[0149] At 450, a feedback message may be generated. The feedback message may include the first stage feedback information and the second stage feedback information, which may include the subset of selected CCs and any joint coding. In some examples, the second stage feedback information includes only the joint coding.

[0150] At 455, the UE transmits the feedback message to the transmitter of the data transmission. Due to the fixed size of the feedback message, the receiver of the feedback message may be able to decode the second stage feedback information without first decoding the first stage feedback information.

[0151] Figure 5 A block diagram 500 of a device 505 supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown. The device 505 may be an example of aspects of a UE 115 as described herein. The device 505 may include a receiver 510, a UE communication manager 515, and a transmitter 520. The device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0152] The receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to turbo-HARQ UCI feedback compression (e.g., feedback protocol), etc.). The information may be passed to other components of the device 505. The receiver 510 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The receiver 510 may utilize a single antenna or a collection of antennas.

[0153] The UE communication manager 515 may receive a data transmission for each component carrier in a set of component carriers from a base station on a wireless channel, wherein each data transmission is associated with a number of code block groups. The UE communication manager 515 may generate feedback information based on a subset of the set of component carriers and a feedback protocol, and transmit a feedback message to the base station, the feedback message indicating feedback information for a subset of the set of component carriers for the wireless channel. The UE communication manager 515 may identify a feedback protocol to be applied to the set of component carriers, and select a subset of the set of component carriers for which feedback information for code block groups is to be reported based on the feedback protocol. The UE communication manager 515 may be an example of aspects of the UE communication manager 810 described herein.

[0154] The UE communication manager 515 or its subcomponents may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the UE communication manager 515 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device designed to perform the functions described in the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0155] The UE communication manager 515 or its subcomponents may be physically located in various locations, including being distributed so that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the UE communication manager 515 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the UE communication manager 515 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0156] Transmitter 520 may transmit signals generated by other components of device 505. In some examples, transmitter 520 may transmit feedback messages. In some examples, transmitter 520 may be co-located with receiver 510 in a transceiver module. For example, transmitter 520 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The transmitter 520 may utilize a single antenna or a collection of antennas.

[0157] Figure 6 A block diagram 600 of a device 605 supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown. The device 605 may be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a UE communication manager 615, and a transmitter 635. The device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0158] The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to turbo-HARQ UCI feedback compression, etc.). The information may be passed to other components of the device 605. The receiver 610 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The receiver 610 may utilize a single antenna or a collection of antennas.

[0159] UE communication manager 615 may be an example of aspects of UE communication manager 515 as described herein. UE communication manager 615 may include feedback component 620, protocol manager 625, and selection manager 630. UE communication manager 615 may be an example of aspects of UE communication manager 810 described herein.

[0160] The feedback component 620 can receive a data transmission for each component carrier in a set of component carriers from a base station on a wireless channel, wherein each data transmission is associated with a number of code block groups; generate feedback information based on a subset of the set of component carriers and a feedback protocol; and transmit a feedback message to the base station, the feedback message indicating feedback information for the subset of the set of component carriers for the wireless channel.

[0161] The protocol manager 625 may identify a feedback protocol to apply to a set of component carriers.

[0162] The selection manager 630 may select a subset of the set of component carriers for which feedback information for a code block group is to be reported based on the feedback protocol.

[0163] The transmitter 635 can transmit signals generated by other components of the device 605. In some examples, the transmitter 635 can be co-located with the receiver 610 in a transceiver module. For example, the transmitter 635 can be a reference Figure 8 Examples of aspects of the described transceiver 820. The transmitter 635 may utilize a single antenna or a collection of antennas.

[0164] Figure 7 A block diagram 700 of a UE communication manager 705 supporting turbo-HARQ UCI feedback compression in accordance with aspects of the present disclosure is shown. The UE communication manager 705 may be an example of aspects of the UE communication manager 515, the UE communication manager 615, or the UE communication manager 810 described herein. The UE communication manager 705 may include a feedback component 710, a protocol manager 715, a selection manager 720, an ACK / NACK manager 725, and a joint encoder 730. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0165] The UE communication manager 705 may receive a data transmission for each component carrier in the set of component carriers (forwarded from a receiver) from a base station on a wireless channel, wherein each data transmission is associated with a number of code block groups.

[0166] The protocol manager 715 may identify a feedback protocol to be applied to the set of component carriers. In some examples, the protocol manager 715 may receive an indication of the feedback protocol from the base station, wherein the identification of the feedback protocol is based on the received signal. In some cases, the indication of the feedback protocol is included in one of a radio resource control signal, a MAC control element, or a downlink control information message.

[0167] In some examples, the protocol manager 715 may determine a maximum number of bits for the feedback information, wherein generating the feedback information is based on the maximum number of bits. In other examples, the protocol manager 715 may determine a maximum size of a subset of the set of component carriers.

[0168] In some examples, the protocol manager 715 may determine a conflict between a first component carrier and a second component carrier having the same priority. In some examples, the protocol manager 715 may select one of the first component carrier and the second component carrier based on an order of the component carriers. In some cases, the priority order of the component carriers is based on at least one of: a component carrier index, a mapping of each component carrier to a priority level, a type of information included in a data transmission of each component carrier, a quality of service requirement for each component carrier, or a priority of information included in a data transmission of each component carrier.

[0169] In some cases, the feedback protocol defines a maximum number of component carriers to be included in the subset of component carriers, and wherein selecting the subset of the set of component carriers for which feedback information for a codeblock group is to be reported is based on the maximum number.

[0170] The selection manager 720 may select a subset of the set of component carriers for which to report feedback information for a code block group based on the feedback protocol. In some examples, the selection manager 720 may include a highest priority component carrier having at least one failed code block group in the subset of the set of component carriers until a maximum size of the subset of the set of component carriers is reached, wherein generating the feedback information is based on the inclusion.

[0171] In some examples, the selection manager 720 may include those component carriers having at least one failed code block group in a subset of the set of component carriers based on an order, wherein generating the feedback information is based on the inclusion. In some examples, the selection manager 720 may include component carriers having at least a threshold number of failed code block groups in a subset of the set of component carriers, wherein generating the feedback information is based on the inclusion. In some cases, the threshold number of failed code block groups includes a ratio of failed code block groups in each component carrier to a total number of code block groups in the component carrier. In some cases, the threshold number of failed code block groups includes a percentage of failed code block groups in each component carrier.

[0172] In some examples, the selection manager 720 may prioritize component carriers with a higher number of failed code block groups in the subset of the set of component carriers.In some cases, two or more component carriers are not included in the subset of component carriers.

[0173] The ACK / NACK manager 725 may determine a reception status for each code block group for each data transmission for each component carrier in the set of component carriers, wherein the feedback information is based on the reception status. In some examples, the ACK / NACK manager 725 may identify component carriers with failed code block groups. In some examples, the ACK / NACK manager 725 may identify those component carriers with at least a threshold number of failed code block groups.

[0174] The joint encoder 730 may encode the additional feedback information for the two or more component carriers into joint feedback information, wherein generating the feedback information is further based on the joint feedback information. In some examples, the joint encoder 730 may determine that the size of the feedback information is less than the total size of the feedback message, wherein encoding the additional feedback information is based on determining that the size of the feedback information is less than the total size. In some examples, the joint encoder 730 may apply a coding table to the additional feedback information to encode the joint feedback information.

[0175] Feedback component 710 can generate feedback information based on the subset of the set of component carriers and the feedback protocol.In some cases, the feedback information includes one or more of CQI, MCS, or DCI miss detection.

[0176] The UE communication manager 705 may transmit a feedback message to the base station, the feedback message indicating feedback information for a subset of the set of component carriers of the wireless channel.

[0177] Figure 8 A diagram of a system 800 including a device 805 supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown. The device 805 may be an example of a device 505, a device 605, or a UE 115 as described herein or include components of these devices. The device 805 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 810, an I / O controller 815, a transceiver 820, an antenna 825, a memory 830, and a processor 840. These components may be in electronic communication via one or more buses (e.g., a bus 845).

[0178] The communication manager 810 may receive a data transmission for each component carrier in a component carrier set from a base station on a wireless channel, wherein each data transmission is associated with a number of code block groups; generate feedback information based on a subset of the component carrier set and a feedback protocol; transmit a feedback message to the base station, the feedback message indicating feedback information for a subset of the component carrier set for the wireless channel; identify a feedback protocol to be applied to the component carrier set; and select a subset of the component carrier set for which feedback information for a code block group is to be reported based on the feedback protocol.

[0179] I / O controller 815 can manage input and output signals of device 805. I / O controller 815 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 815 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 815 can utilize an operating system, such as Or another known operating system. In other cases, I / O controller 815 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 815 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I / O controller 815 or via hardware components controlled by I / O controller 815.

[0180] The transceiver 820 may communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 820 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 820 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0181] In some cases, a wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0182] The memory 830 may include random access memory (RAM) and read-only memory (ROM). The memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 830 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices. In some examples, the memory 830 may store tables for joint encoding.

[0183] The processor 840 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks that support turbo-HARQ UCI feedback compression).

[0184] The code 835 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 835 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 835 may not be directly executed by the processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0185] Fig. 9 A block diagram 900 of a device 905 supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown. The device 905 may be an example of aspects of a base station 105 as described herein. The device 905 may include a receiver 910, a base station communication manager 915, and a transmitter 920. The device 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0186] The receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to turbo-HARQ UCI feedback compression, etc.). The information may be passed to other components of the device 905. The receiver 910 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The receiver 910 may utilize a single antenna or a collection of antennas.

[0187] The base station communication manager 915 may determine a feedback protocol. In some examples, the base station communication manager 915 may decide the feedback protocol and generate a signal indicating the feedback protocol to the UE. In other examples, the base station communication manager 915 negotiates with the UE to determine the feedback protocol and may generate a signal of the feedback protocol to the UE. The base station communication manager 915 may be an example of aspects of the base station communication managers 165 and 1210 described herein.

[0188] The base station communication manager 915 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the base station communication manager 915 or its subcomponents may be performed by a general purpose processor, DSP, ASIC, FPGA or other programmable logic device designed to perform the functions described in the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0189] The base station communication manager 915 or its subcomponents may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the base station communication manager 915 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the base station communication manager 915 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, I / O components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0190] The transmitter 920 may transmit signals generated by other components of the device 905. In some examples, the transmitter 920 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 920 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The transmitter 920 may utilize a single antenna or a collection of antennas.

[0191] Fig.10 A block diagram 1000 of a device 1005 supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure is shown. The device 1005 may be an example of aspects of the device 905 or base station 105 as described herein. The device 1005 may include a receiver 1010, a base station communication manager 1015, and a transmitter 1030. The device 1005 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0192] The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to turbo-HARQ UCI feedback compression, etc.). The information may be passed to other components of the device 1005. The receiver 1010 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The receiver 1010 may utilize a single antenna or a collection of antennas.

[0193] The base station communication manager 1015 may be an example of aspects of the base station communication manager 915 as described herein. The base station communication manager 1015 may include a protocol manager 1020 and a retransmission manager 1025. The base station communication manager 1015 may be an example of aspects of the base station communication manager 1210 described herein.

[0194] The protocol manager 1020 may identify a feedback protocol to use. The protocol manager 1020 may signal the feedback protocol to the UE. The retransmission manager 1025 may instruct the transmitter 1030 to retransmit at least a portion of the data packet based on the updated transmission parameters.

[0195] Transmitter 1030 may transmit signals generated by other components of device 1005. In some examples, transmitter 1030 may be co-located with receiver 1010 in a transceiver module. Fig.12 Examples of various aspects of the described transceiver 1220. The transmitter 1030 may utilize a single antenna or a collection of antennas.

[0196] Fig.11 A block diagram 1100 of a base station communication manager 1105 supporting turbo-HARQ UCI feedback compression is shown in accordance with aspects of the present disclosure. The base station communication manager 1105 may be an example of aspects of the base station communication manager 915, the base station communication manager 1015, or the base station communication manager 1210 described herein. The base station communication manager 1105 may include a protocol manager 1115, a retransmission manager 1110, and a feedback manager 1120. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0197] The protocol manager 1115 may identify the feedback protocol to use. The protocol manager 1115 may signal the feedback protocol to the UE. The protocol manager 1115 may use any feedback protocol and joint encoding as described herein.

[0198] Feedback manager 1120 may update transmission parameters based on a channel quality indicator or DTX received in a feedback message. In some examples, feedback manager 1120 may update a modulation and coding scheme based on the first and second stage feedback information. In some examples, feedback manager 1120 may update a coding length for retransmitted data based on channel state information or transmission rank. In some examples, feedback manager 1120 may update resources for retransmitted data based on the feedback message.

[0199] The modulation manager 1115 may update one or more modulation parameters. The retransmission manager 1110 may cause a transmitter of the base station to retransmit at least a portion of the data transmission over the wireless channel using the updated transmission parameters.

[0200] Fig.12 A diagram of a system 1200 including a device 1205 supporting turbo-HARQ UCI feedback compression according to various aspects of the present disclosure is shown. The device 1205 may be an example of a device 905, a device 1005, or a base station 105 as described herein or include components of these devices. The device 1205 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a base station communication manager 1210, a network base station communication manager 1215, a transceiver 1220, an antenna 1225, a memory 1230, a processor 1240, and an inter-site base station communication manager 1245. These components may be in electronic communication via one or more buses (e.g., bus 1250).

[0201] The base station communications manager 1210 may negotiate or otherwise determine a feedback protocol, decode the feedback information according to the specifications of the feedback protocol, and adjust retransmissions based on the feedback information.

[0202] The network base station communication manager 1215 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network base station communication manager 1215 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0203] The transceiver 1220 may communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1220 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1220 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0204] In some cases, a wireless device may include a single antenna 1225. However, in some cases, the device may have more than one antenna 1225, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0205] Memory 1230 may include RAM, ROM, or a combination thereof. Memory 1230 may store computer readable code 1235 including instructions that, when executed by a processor (e.g., processor 1240), cause the device to perform various functions described herein. In some cases, memory 1230 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0206] Processor 1240 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1240 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1240. Processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) to cause device 1205 to perform various functions (e.g., functions or tasks that support turbo-HARQUCI feedback compression).

[0207] The inter-site base station communication manager 1245 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UE 115 in coordination with other base stations 105. For example, the inter-site base station communication manager 1245 may coordinate scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmissions. In some examples, the inter-site base station communication manager 1245 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0208] The code 1235 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1235 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 1235 may not be directly executed by the processor 1240, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0209] Fig.13 1 is a flow chart illustrating a method 1300 for supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure. The operations of the method 1300 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1300 may be implemented by a UE 115 or components thereof as described herein. Figures 1 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0210] At 1305, the UE may receive a data transmission for each component carrier in the set of component carriers from a base station on a wireless channel, wherein each data transmission is associated with a number of code block groups. The operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed as described with reference to Figures 5 to 8 The feedback component described is performed.

[0211] At 1310, the UE may identify a feedback protocol to be applied to a set of component carriers. The operations of 1310 may be performed according to the methods described herein. In some examples, aspects of the operations of 1310 may be performed as described in reference to Figures 5 to 8 The described protocol manager is executed.

[0212] At 1315, the UE may select a subset of the set of component carriers for which to report feedback information for the code block group based on the feedback protocol. The operations of 1315 may be performed according to the methods described herein. In some examples, aspects of the operations of 1315 may be as described in reference to Figures 5 to 8 The selection manager described is executed.

[0213] At 1320, the UE may generate feedback information based on the subset of the component carrier set and the feedback protocol. The operations of 1320 may be performed according to the methods described herein. In some examples, aspects of the operations of 1320 may be as described with reference to Figures 5 to 8 The feedback component described is performed.

[0214] At 1325, the UE may transmit a feedback message to the base station indicating feedback information for a subset of the set of component carriers of the wireless channel. The operations of 1325 may be performed according to the methods described herein. In some examples, aspects of the operations of 1325 may be as described with reference to Figures 5 to 8 The feedback component described is performed.

[0215] Fig.14 1 is a flow chart illustrating a method 1400 for supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure. The operations of the method 1400 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1400 may be implemented by a UE 115 or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0216] At 1405, the UE may receive a data transmission for each component carrier in the set of component carriers from a base station on a wireless channel, wherein each data transmission is associated with a number of code block groups. The operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed as described with reference to Figures 5 to 8 The feedback component described is performed.

[0217] At 1410, the UE may identify a feedback protocol to be applied to a set of component carriers. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed as described in reference to Figures 5 to 8 The described protocol manager is executed.

[0218] At 1415, the UE may select a subset of the set of component carriers for which to report feedback information for the code block group based on the feedback protocol. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed as described in reference to Figures 5 to 8 The selection manager described is executed.

[0219] At 1420, the UE may generate feedback information based on the subset of the component carrier set and the feedback protocol. The operations of 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be as described with reference to Figures 5 to 8 The feedback component described is performed.

[0220] At 1425, the UE may determine a maximum size of a subset of the component carrier set. The operations of 1425 may be performed according to the methods described herein. In some examples, aspects of the operations of 1425 may be performed as described in reference to Figures 5 to 8 The described protocol manager is implemented.

[0221] At 1430, the UE may identify the component carrier with the failed code block group. The operations of 1430 may be performed according to the methods described herein. In some examples, aspects of the operations of 1430 may be performed as described with reference to Figures 5 to 8 The ACK / NACK manager described in the specification is used to perform the above operations.

[0222] At 1435, the UE may include the highest priority component carrier having at least one failed code block group in the subset of the component carrier set until a maximum size of the subset of the component carrier set is reached, wherein generating the feedback information is based on the inclusion. The operations of 1435 may be performed according to the methods described herein. In some examples, aspects of the operations of 1435 may be performed as described in reference to Figures 5 to 8 The selection manager described is executed.

[0223] At 1440, the UE may transmit a feedback message to the base station indicating feedback information for a subset of the set of component carriers of the wireless channel. The operations of 1440 may be performed according to the methods described herein. In some examples, aspects of the operations of 1440 may be as described with reference to Figures 5 to 8 The feedback component described is performed.

[0224] Fig.151 is a flow chart illustrating a method 1500 for supporting turbo-HARQ UCI feedback compression according to aspects of the present disclosure. The operations of the method 1500 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1500 may be implemented by a UE 115 or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0225] At 1505, the UE may receive a data transmission for each component carrier in the set of component carriers from a base station on a wireless channel, wherein each data transmission is associated with a number of code block groups. The operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed as described with reference to Figures 5 to 8 The feedback component described is performed.

[0226] At 1510, the UE may identify a feedback protocol to be applied to a set of component carriers. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed as described in reference to Figures 5 to 8 The described protocol manager is implemented.

[0227] At 1515, the UE may select a subset of the set of component carriers for which to report feedback information for the code block group based on the feedback protocol. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be as described in reference to Figures 5 to 8 The selection manager described is executed.

[0228] At 1520, the UE may generate feedback information based on the subset of the component carrier set and the feedback protocol. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be as described with reference to Figures 5 to 8 The feedback component described is performed.

[0229] At 1525, the UE may identify those component carriers that have at least a threshold number of failed code block groups. The operations of 1525 may be performed according to the methods described herein. In some examples, aspects of the operations of 1525 may be as described with reference to Figures 5 to 8 The ACK / NACK manager described in the specification is used to perform the above operations.

[0230] At 1530, the UE may include in a subset of the set of component carriers the component carriers having at least a threshold number of failed code block groups, wherein generating the feedback information is based on the inclusion. The operations of 1530 may be performed according to the methods described herein. In some examples, aspects of the operations of 1530 may be as described with reference to Figures 5 to 8 The selection manager described is executed.

[0231] At 1535, the UE may transmit a feedback message to the base station indicating feedback information for a subset of the set of component carriers of the wireless channel. The operations of 1535 may be performed according to the methods described herein. In some examples, aspects of the operations of 1535 may be as described with reference to Figures 5 to 8 The feedback component described is performed.

[0232] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0233] The following provides an overview of various aspects of the disclosure:

[0234] Aspect 1: A method for wireless communication at a UE, comprising: receiving a data transmission for each of a plurality of component carriers from a base station on a wireless channel, wherein each data transmission is associated with a number of code block groups; identifying a feedback protocol to be applied to the plurality of component carriers; selecting a subset of the plurality of component carriers for which feedback information for the code block groups is to be reported based at least in part on the feedback protocol; generating feedback information based at least in part on the subset of the plurality of component carriers and the feedback protocol, and transmitting a feedback message to the base station, the feedback message indicating feedback information for the subset of the plurality of component carriers.

[0235] Aspect 2: The method of aspect 1 further comprises: determining a reception status of each code block group for each data transmission of each component carrier in a plurality of component carriers, wherein the feedback information is based at least in part on the reception status.

[0236] Aspect 3: The method of any one of aspects 1 to 2, further comprising: receiving an indication of a feedback protocol from a base station, wherein identifying the feedback protocol is based at least in part on receiving the indication.

[0237] Aspect 4: The method of aspect 3, wherein the indication of the feedback protocol is included in one of a radio resource control signal, a MAC control element, or a downlink control information message.

[0238] Aspect 5: The method of any one of aspects 1 to 4, wherein the feedback information comprises one or more of a channel quality index, a modulation and coding scheme, or a downlink control information miss detection.

[0239] Aspect 6: The method of any one of aspects 1 to 5, wherein identifying the feedback protocol further comprises: determining a maximum number of bits for the feedback information, wherein generating the feedback information is based at least in part on the maximum number of bits.

[0240] Aspect 7: A method as in any one of Aspects 1 to 6, wherein the feedback protocol defines a priority order of component carriers, and wherein selecting a subset of multiple component carriers for which feedback information for code block groups is to be reported further includes: determining a maximum size of a subset of multiple component carriers; identifying component carriers with failed code block groups; and including a highest priority component carrier with at least one failed code block group in the subset of multiple component carriers until the maximum size of the subset of multiple component carriers is reached, wherein generating the feedback information is based at least in part on the inclusion.

[0241] Aspect 8: A method as in Aspect 7, wherein the priority order of the component carriers is based on at least one of: a component carrier index, a mapping of each component carrier to a priority level, a type of information included in the data transmission of each component carrier, a quality of service requirement for each component carrier, or a priority of information included in the data transmission of each component carrier.

[0242] Aspect 9: The method of any one of aspects 7 to 8, further comprising: determining a conflict between a first component carrier and a second component carrier having the same priority; and selecting one of the first component carrier and the second component carrier based on an order of the component carriers.

[0243] Aspect 10: A method as in any of Aspects 1 to 9, wherein the feedback protocol defines an order of component carriers, and wherein selecting a subset of multiple component carriers for which feedback information for code block groups is to be reported further includes: identifying component carriers having failed code block groups; and including those component carriers having at least one failed code block group in the subset of multiple component carriers based at least in part on the order, wherein generating the feedback information is based at least in part on the inclusion.

[0244] Aspect 11: A method as in any one of Aspects 1 to 10, wherein the feedback protocol defines a threshold number of failed code block groups, and wherein selecting a subset of multiple component carriers for which feedback information for code block groups is to be reported further comprises: identifying those component carriers having at least the threshold number of failed code block groups; and including the component carriers having at least the threshold number of failed code block groups in the subset of the multiple component carriers, wherein generating the feedback information is based at least in part on the inclusion.

[0245] Aspect 12: The method of aspect 11, wherein including component carriers having at least a threshold number of failed code block groups further comprises: prioritizing component carriers having a higher number of failed code block groups in a subset of the plurality of component carriers.

[0246] Aspect 13: The method of any one of aspects 11 to 12, wherein the threshold number of failed code block groups comprises a ratio of failed code block groups in each component carrier to the total number of code block groups in the component carrier.

[0247] Aspect 14: The method of any one of aspects 11 to 13, wherein the threshold number of failed code block groups comprises a percentage of failed code block groups in each component carrier.

[0248] Aspect 15: A method as in any one of Aspects 1 to 14, wherein the feedback protocol defines a maximum number of component carriers to be included in the subset of component carriers, and selecting the subset of the plurality of component carriers for which feedback information for a code block group is to be reported is based at least in part on the maximum number.

[0249] Aspect 16: The method of any one of aspects 1 to 15, further comprising: encoding additional feedback information of two or more component carriers into joint feedback information, wherein generating the feedback information is further based on the joint feedback information.

[0250] Aspect 17: The method of Aspect 16, wherein the two or more component carriers are not included in a subset of component carriers.

[0251] Aspect 18: The method of any one of Aspects 16 to 17, further comprising: determining that the size of the feedback information is smaller than the total size of the feedback message, wherein encoding the additional feedback information is based on determining that the size of the feedback information is smaller than the total size.

[0252] Aspect 19: The method of any one of aspects 16 to 18, wherein encoding the additional feedback information further comprises: applying a coding table to the additional feedback information to encode the joint feedback information.

[0253] Aspect 20: A method for wireless communication at a base station, comprising: identifying a feedback protocol to be applied to multiple component carriers to determine feedback information; transmitting an indication of the feedback protocol to a user equipment (UE); transmitting a data transmission for each of the multiple component carriers to the UE on a wireless channel, wherein each data transmission is associated with a number of code block groups; and receiving a feedback message from the UE according to the feedback protocol, the feedback message indicating feedback information for a subset of the multiple component carriers of the wireless channel.

[0254] Aspect 21: The method of aspect 20, further comprising: determining a reception status of each code block group for each data transmission for each component carrier in a subset of the plurality of component carriers based at least in part on the feedback information.

[0255] Aspect 22: The method of any one of aspects 20 to 21, wherein the feedback information comprises one or more of a channel quality index, a modulation and coding scheme, or a downlink control information miss detection.

[0256] Aspect 23: The method of any one of aspects 20 to 22, wherein identifying the feedback protocol further comprises: determining a maximum number of bits for the feedback information, wherein identifying the feedback protocol is based at least in part on the maximum number of bits.

[0257] Aspect 24: The method of any one of Aspects 20 to 23, wherein the feedback protocol defines a priority order of the component carriers.

[0258] Aspect 25: A method as in Aspect 24, wherein the priority order of the component carriers is based on at least one of: a component carrier index, a mapping of each component carrier to a priority level, a type of information included in the data transmission of each component carrier, a quality of service requirement for each component carrier, or a priority of information included in the data transmission of each component carrier.

[0259] Aspect 26: A method as in any of Aspects 20 to 25, wherein the feedback protocol defines an order of component carriers, a threshold number of failed code block groups, a maximum number of component carriers to be included in a subset of component carriers, and selecting a subset of multiple component carriers for which feedback information for code block groups is to be reported is based at least in part on the maximum number.

[0260] Aspect 27: The method of any one of Aspects 20 to 26, further comprising: decoding joint feedback information for two or more component carriers from the feedback information.

[0261] Aspect 28: The method of Aspect 27, wherein the two or more component carriers are not included in a subset of component carriers.

[0262] Aspect 29: The method of any one of aspects 20 to 28, wherein encoding the additional feedback information further comprises: applying a coding table to the additional feedback information to encode the joint feedback information.

[0263] Aspect 30: The method of any one of aspects 20 to 29, wherein the indication of the feedback protocol is included in one of a radio resource control signal, a MAC control element, or a downlink control information message.

[0264] Aspect 31: An apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 1 to 19.

[0265] Aspect 32: An apparatus comprising at least one means for performing the method of any one of aspects 1 to 19.

[0266] Aspect 33: A non-transitory computer-readable medium storing code, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 19.

[0267] Aspect 34: An apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 20 to 30.

[0268] Aspect 35: An apparatus comprising at least one means for performing the method of any one of aspects 20 to 30.

[0269] Aspect 36: A non-transitory computer-readable medium storing code, the code comprising instructions executable by a processor to perform the method of any one of aspects 20 to 30.

[0270] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applied to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0271] The information and signals described herein may be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0272] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0273] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Other examples and implementations fall within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0274] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to transfer from one place to another place.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.As an example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage device, or can be used to carry or store instruction or data structure form of desired program code means and can be accessed by general or special-purpose computer or general or special-purpose processor any other non-transient medium.Similarly, any connection is also properly referred to as computer-readable medium.For example, if software is transmitted from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then this coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are just included in the definition of computer-readable medium. Disk and disc as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0275] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an example step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0276] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between similar components. If only the first reference number is used in the specification, the description may apply to any of the similar components having the same first reference number regardless of the second reference number, or other subsequent reference numbers.

[0277] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that can be implemented or fall within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0278] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the universal principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A first network node for wireless communication, comprising: at least one memory; as well as at least one processor coupled to the at least one memory, wherein the first network node is configured to: receiving, from a second network node, a data transmission for each of a plurality of component carriers over a wireless channel, wherein each data transmission is associated with a number of code block groups; receiving an indication of a feedback protocol from the second network node, wherein the feedback protocol applies to the plurality of component carriers and defines a priority order of the plurality of component carriers; determining a maximum number of component carriers for which feedback information is to be reported; identifying a component carrier having a failed code block group among the plurality of component carriers; selecting, based on the feedback protocol, a subset of the plurality of component carriers for which feedback information for the number of code block groups is to be reported, wherein the subset of the plurality of component carriers includes a highest priority component carrier having at least one failed code block group until the maximum number of component carriers is reached; generating the feedback information based on the subset of the plurality of component carriers and the feedback protocol; as well as A feedback message is transmitted to the second network node, the feedback message indicating the feedback information for the subset of the plurality of component carriers.

2. The first network node according to claim 1, wherein the first network node is further configured to: A reception status of each code block group for each data transmission for each component carrier of the plurality of component carriers is determined, wherein the feedback information is based on the reception status.

3. The first network node of claim 1, wherein the indication of the feedback protocol is included in one of a radio resource control signal, a medium access control (MAC) control element, or a downlink control information message.

4. The first network node of claim 1, wherein the feedback information comprises one or more of a channel quality index, a modulation and coding scheme, or a downlink control information miss detection.

5. The first network node of claim 1, wherein the first network node is further configured to: A maximum number of bits for the feedback information is determined, wherein the feedback information is based on the maximum number of bits.

6. The first network node of claim 1 , wherein the priority order of the plurality of component carriers is based on at least one of: a component carrier index, a mapping of each component carrier to a priority level, a type of information included in the data transmission of each component carrier, a quality of service requirement for each component carrier, or a priority of information included in the data transmission of each component carrier.

7. The first network node of claim 1, wherein the first network node is further configured to: determining a conflict between a first component carrier and a second component carrier having the same priority; and One of the first component carrier and the second component carrier is selected based on an order of the plurality of component carriers.

8. The first network node of claim 1, wherein the first network node is further configured to: Component carriers having at least one failed code block group are included in the subset of the plurality of component carriers based on the order, wherein the feedback information is based on the including.

9. The first network node of claim 1, wherein the feedback protocol defines a threshold number of failed code block groups, and wherein the first network node is further configured to: identifying those component carriers having at least the threshold number of failed code block groups; and The component carrier having at least the threshold number of failed code block groups is included in the subset of the plurality of component carriers, wherein the feedback information is based on the including.

10. The first network node according to claim 9, wherein: In order to include the component carrier having at least the threshold number of failed code block groups in the subset of the plurality of component carriers, the first network node is further configured to: The component carriers having a higher number of failed code block groups are prioritized in the subset of the plurality of component carriers.

11. The first network node of claim 9, wherein the threshold number of failed code block groups comprises a ratio of failed code block groups in each component carrier to a total number of code block groups in the component carrier.

12. The first network node of claim 9, wherein the threshold number of failed codeblock groups comprises a percentage of failed codeblock groups in each component carrier.

13. The first network node of claim 1, wherein the first network node is further configured to: Additional feedback information for two or more component carriers is encoded into joint feedback information, wherein the feedback information is further based on the joint feedback information.

14. The first network node of claim 13, wherein the two or more component carriers are not included in the subset of the plurality of component carriers.

15. The first network node of claim 13, wherein the first network node is further configured to: Determine that the size of the feedback information is smaller than the total size of the feedback message, wherein the additional feedback information is encoded based on determining that the size of the feedback information is smaller than the total size.

16. The first network node according to claim 13, wherein: In order to encode the additional feedback information, the first network node is further configured to: A coding table is applied to the additional feedback information to encode the joint feedback information.

17. A wireless communication method performed by a first network node, comprising: receiving, from a second network node, a data transmission for each of a plurality of component carriers over a wireless channel, wherein each data transmission is associated with a number of code block groups; receiving an indication of a feedback protocol from the second network node, wherein the feedback protocol applies to the plurality of component carriers and defines a priority order of the plurality of component carriers; determining a maximum number of component carriers for which feedback information is to be reported; identifying a component carrier having a failed code block group among the plurality of component carriers; selecting, based on the feedback protocol, a subset of the plurality of component carriers for which feedback information for the number of code block groups is to be reported, wherein the subset of the plurality of component carriers includes a highest priority component carrier having at least one failed code block group until the maximum number of component carriers is reached; generating the feedback information based on the subset of the plurality of component carriers and the feedback protocol; as well as A feedback message is transmitted to the second network node, the feedback message indicating the feedback information for the subset of the plurality of component carriers.

18. The method of claim 17, further comprising: A reception status of each code block group for each data transmission for each component carrier of the plurality of component carriers is determined, wherein the feedback information is based on the reception status.

19. The method of claim 17, wherein the indication of the feedback protocol is included in one of a radio resource control signal, a medium access control (MAC) control element, or a downlink control information message.

20. The method of claim 17, wherein the feedback information comprises one or more of a channel quality index, a modulation and coding scheme, or a downlink control information miss detection.

21. The method of claim 17, wherein identifying the feedback protocol further comprises: A maximum number of bits for the feedback information is determined, wherein generating the feedback information is based on the maximum number of bits.

22. The method of claim 17, further comprising: determining a conflict between a first component carrier and a second component carrier having the same priority; as well as One of the first component carrier and the second component carrier is selected based on an order of the plurality of component carriers.

23. The method of claim 17, wherein including the component carrier having the at least one failed code block group in the subset of the plurality of component carriers is further based on the order, wherein generating the feedback information is based on the including.

24. A wireless communication method performed by a first network node, comprising: transmitting an indication of a feedback protocol to a second network node, wherein the feedback protocol is used for feedback information determination, applies to a plurality of component carriers and defines a priority order of the plurality of component carriers; transmitting, to the second network node, over a wireless channel, a data transmission for each component carrier of the plurality of component carriers, wherein each data transmission is associated with a number of code block groups; as well as A feedback message is received from the second network node according to the feedback protocol, the feedback message indicating feedback information for a subset of the plurality of component carriers of the wireless channel, wherein the subset of the plurality of component carriers includes a highest priority component carrier having at least one failed code block group until a maximum number of component carriers is reached.

25. A first network node for wireless communication, comprising: at least one memory; as well as at least one processor coupled to the at least one memory, wherein the at least one processor is configured to: transmitting an indication of a feedback protocol to a second network node, wherein the feedback protocol is used for feedback information determination, applies to a plurality of component carriers and defines a priority order of the plurality of component carriers; transmitting, to the second network node, over a wireless channel, a data transmission for each component carrier of the plurality of component carriers, wherein each data transmission is associated with a number of code block groups; as well as A feedback message is received from the second network node according to the feedback protocol, the feedback message indicating feedback information for a subset of the plurality of component carriers of the wireless channel, wherein the subset of the plurality of component carriers includes a highest priority component carrier having at least one failed code block group until a maximum number of component carriers is reached.

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